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Nondestructive testing can determine the physical properties of materials, such as ductility, tensile strength and fracture toughness. We usually use non-destructive testing to determine the reliability and integrity of the product in order to control the whole manufacturing process. In addition, the government's safety regulations are increasingly stringent in terms of quality control, reliability and safety of machine performance, while manufacturers'demand for improving machine quality and life is also increasing. These are the main factors contributing to the development of the global nondestructive testing equipment market. However, compared with the rapid development of equipment market, the lack of non-destructive professional and technical personnel is a difficult problem that we have to solve urgently. The global inspections ndt equipment market is subdivided according to various nondestructive testing technologies, which are divided into ultrasonic testing, radiation testing, electromagnetic testing, visual testing and other testing technologies (including magnetic particle testing and penetration testing). Ultrasound testing equipment occupies a dominant position in the market. The main factor driving the growth of ultrasonic testing equipment market is its wide application in steel and aluminium materials, construction, manufacturing, aerospace, national defense and automotive industries. According to the region, North America dominates the global inspections ndtequipment market, accounting for about 35.77% of the total market share. Large investments in energy industries such as oil and gas are the main drivers of North American market growth. At the same time, Europe's equipment market is the second largest in the world, and its demand for global inspections ndtequipment will also be further enhanced in our future forecast stage. The demand for modernization of oil and gas and power generation industry is the main factor to promote the development of European market. The automotive industry is likely to make a significant contribution to Europe's future equipment market. And we expect the Asia-Pacific region to be the fastest growing region by 2021.

Nondestructive testing can determine the physical properties of materials, such as ductility, tensile strength and fracture toughness. We usually use non-destructive testing to determine the reliability and integrity of the product in order to control the whole manufacturing process. In addition, the government's safety regulations are increasingly stringent in terms of quality control, reliability and safety of machine performance, while manufacturers'demand for improving machine quality and life is also increasing. These are the main factors contributing to the development of the global nondestructive testing equipment market. However, compared with the rapid development of equipment market, the lack of non-destructive professional and technical personnel is a difficult problem that we have to solve urgently.

  The global inspections ndt equipment market is subdivided according to various nondestructive testing technologies, which are divided into ultrasonic testing, radiation testing, electromagnetic testing, visual testing and other testing technologies (including magnetic particle testing and penetration testing). Ultrasound testing equipment occupies a dominant position in the market. The main factor driving the growth of ultrasonic testing equipment market is its wide application in steel and aluminium materials, construction, manufacturing, aerospace, national defense and automotive industries.

 According to the region, North America dominates the global inspections ndtequipment market, accounting for about 35.77% of the total market share. Large investments in energy industries such as oil and gas are the main drivers of North American market growth. At the same time, Europe's equipment market is the second largest in the world, and its demand for global inspections ndtequipment will also be further enhanced in our future forecast stage. The demand for modernization of oil and gas and power generation industry is the main factor to promote the development of European market. The automotive industry is likely to make a significant contribution to Europe's future equipment market. And we expect the Asia-Pacific region to be the fastest growing region by 2021.

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Ultrasound flaw detection is a method to inspect the defect of a part by means of the reflection characteristics of the interface edge when the ultrasonic energy penetrates into the depth of the metal material and one section enters another section. When the ultrasonic beam passes from the surface of the part to the inside of the metal from the probe, the reflected waves will occur separately when the defect and the bottom of the part are encountered. Pulse waveforms are formed on the fluorescent screen, and the position and size of defects are judged according to these pulse waveforms. Eddy current detection is to use the principle of electromagnetic induction to excite the probe coil with the sinusoidal current. When the probe approaches the metal surface, the alternating magnetic field around the coil generates induced current on the metal surface. For flat metal, the flow direction of the induced current is a circle with concentric coils, similar to a vortex, called eddy current. At the same time, the eddy current also produces the same frequency magnetic field, which is opposite to the coil magnetic field. The loss resistance of the eddy current channel and the reverse flux produced by the eddy current are reflected in the probe coil, which changes the current size and phase of the coil, that is, the impedance of the coil. Therefore, when the probe moves on the metal surface and encounters defects or changes in material and size, the eddy current magnetic field reacts differently to the coil, causing the coil impedance to change. By measuring the variation with the eddy current testing instrument, the defect on the metal surface or other changes in physical properties can be identified. There are many factors affecting the eddy current field, such as the coupling degree between the probe coil and the tested material, the shape and size of the material, conductivity, permeability, and defects, etc. Therefore, the eddy current principle can be used to solve the problems of metal material flaw detection, thickness measurement and sorting.

Ultrasound flaw detection is a method to inspect the defect of a part by means of the reflection characteristics of the interface edge when the ultrasonic energy penetrates into the depth of the metal material and one section enters another section. When the ultrasonic beam passes from the surface of the part to the inside of the metal from the probe, the reflected waves will occur separately when the defect and the bottom of the part are encountered. Pulse waveforms are formed on the fluorescent screen, and the position and size of defects are judged according to these pulse waveforms. Eddy current detection is to use the principle of electromagnetic induction to excite the probe coil with the sinusoidal current. When the probe approaches the metal surface, the alternating magnetic field around the coil generates induced current on the metal surface. For flat metal, the flow direction of the induced current is a circle with concentric coils, similar to a vortex, called eddy current. At the same time, the eddy current also produces the same frequency magnetic field, which is opposite to the coil magnetic field.

 The loss resistance of the eddy current channel and the reverse flux produced by the eddy current are reflected in the probe coil, which changes the current size and phase of the coil, that is, the impedance of the coil. Therefore, when the probe moves on the metal surface and encounters defects or changes in material and size, the eddy current magnetic field reacts differently to the coil, causing the coil impedance to change. By measuring the variation with the eddy current testing instrument, the defect on the metal surface or other changes in physical properties can be identified.

 There are many factors affecting the eddy current field, such as the coupling degree between the probe coil and the tested material, the shape and size of the material, conductivity, permeability, and defects, etc. Therefore, the eddy current principle can be used to solve the problems of metal material flaw detection, thickness measurement and sorting.

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There are many testing methods for ndt wire rope tester, including ultrasonic testing, ray testing, acoustic emission testing, eddy current testing, electromagnetic testing, mechanical testing, acoustic testing, current testing, optical testing, vibration testing, etc. Until recent years, electromagnetic testing is the main method in the testing of ndt wire rope tester, and the other non-destructive testing technology is still limited to the laboratory research stage. In view of LF type defect of local damage, magnetic flux leakage detection principle is adopted, that is, the defect of wire rope is detected by leakage magnetic field at the broken wire of wire rope. In view of LMA type defect of metal cross-section area loss, the main magnetic detection method is adopted, that is, the change of metal cross-section area of wire rope is detected by measuring the magnetic flux passing through the inside of wire rope. According to the different working principle of electromagnetic detection method, its magnetization can be divided into AC magnetization, DC magnetization and permanent magnetization. Because of its small size, light weight, convenient use and low detection cost, especially the development and application of new permanent magnet materials in recent years, the advantages of permanent magnet magnetization detection device are more obvious, so a large number of permanent magnet magnetization methods are used in electromagnetic detection method. The commonly used sensor types are Hall element sensor and induction coil. In practical use, the output signal of Hall sensor is not affected by the moving speed of sensor, and the volume of Hall element is small, which has great advantages in measuring small gap space magnetic field. Therefore, the ndt wire rope tester has been widely used.

There are many testing methods for ndt wire rope tester, including ultrasonic testing, ray testing, acoustic emission testing, eddy current testing, electromagnetic testing, mechanical testing, acoustic testing, current testing, optical testing, vibration testing, etc. Until recent years, electromagnetic testing is the main method in the testing of ndt wire rope tester, and the other non-destructive testing technology is still limited to the laboratory research stage.

 In view of LF type defect of local damage, magnetic flux leakage detection principle is adopted, that is, the defect of wire rope is detected by leakage magnetic field at the broken wire of wire rope.

 In view of LMA type defect of metal cross-section area loss, the main magnetic detection method is adopted, that is, the change of metal cross-section area of wire rope is detected by measuring the magnetic flux passing through the inside of wire rope.

 According to the different working principle of electromagnetic detection method, its magnetization can be divided into AC magnetization, DC magnetization and permanent magnetization. Because of its small size, light weight, convenient use and low detection cost, especially the development and application of new permanent magnet materials in recent years, the advantages of permanent magnet magnetization detection device are more obvious, so a large number of permanent magnet magnetization methods are used in electromagnetic detection method.

 The commonly used sensor types are Hall element sensor and induction coil. In practical use, the output signal of Hall sensor is not affected by the moving speed of sensor, and the volume of Hall element is small, which has great advantages in measuring small gap space magnetic field. Therefore, the ndt wire rope tester has been widely used.

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The basic working principle of eddy current testing instrument is as follows: When the test coil with alternating current is close to the conductor workpiece, the alternating magnetic field generated by the coil will cause the conductor to generate current (eddy current). The size, phase and flow pattern of eddy current are affected by workpiece properties (conductivity, permeability, shape, size) and defects. The voltage and impedance of coil are changed by the reaction of magnetic field. Therefore, the change of voltage or impedance of the test coil can be measured by the instrument, and the nature, state and defect of the workpiece can be judged. Characteristics of Eddy Current Testing Instrument 1. Scope of application of eddy current testing instruments (a) Process inspection and final product inspection: quality control during manufacturing process or rejection of non-conforming products in finished products. b) In-service inspection: periodic inspection for mechanical parts and heat exchange pipes and other facilities. c) Other applications: thickness measurement of metal sheets and coatings, material sorting, conductivity measurement, etc. 2. Advantages of Eddy Current Testing Instruments (a) No contact with the workpiece and no coupling agent are needed in the detection, which can be carried out at high temperature. At the same time, the probe can be extended to remote detection, which can effectively detect the narrow area and deep hole wall of the workpiece. b) The detection sensitivity of surface and near surface defects is very high. c) It is easy to realize high-speed and high-efficiency automatic detection for the detection of tubes, rods and wires. It can digitally process the test results, and then store, reproduce and process the data.

The basic working principle of eddy current testing instrument is as follows:

 When the test coil with alternating current is close to the conductor workpiece, the alternating magnetic field generated by the coil will cause the conductor to generate current (eddy current). The size, phase and flow pattern of eddy current are affected by workpiece properties (conductivity, permeability, shape, size) and defects. The voltage and impedance of coil are changed by the reaction of magnetic field.

 Therefore, the change of voltage or impedance of the test coil can be measured by the instrument, and the nature, state and defect of the workpiece can be judged.

 Characteristics of Eddy Current Testing Instrument

 1. Scope of application of eddy current testing instruments

 (a) Process inspection and final product inspection: quality control during manufacturing process or rejection of non-conforming products in finished products.

 b) In-service inspection: periodic inspection for mechanical parts and heat exchange pipes and other facilities.

 c) Other applications: thickness measurement of metal sheets and coatings, material sorting, conductivity measurement, etc.

 2. Advantages of Eddy Current Testing Instruments

 (a) No contact with the workpiece and no coupling agent are needed in the detection, which can be carried out at high temperature. At the same time, the probe can be extended to remote detection, which can effectively detect the narrow area and deep hole wall of the workpiece.

 b) The detection sensitivity of surface and near surface defects is very high.

 c) It is easy to realize high-speed and high-efficiency automatic detection for the detection of tubes, rods and wires. It can digitally process the test results, and then store, reproduce and process the data.

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Pulsed eddy current inspection technology is a new non-destructive testing technology for subsurface defect detection. It is a new application field of eddy current testing. It determines the location of defect by the time when the maximum magnetic field appears, so as to realize non-destructive detection and quantitative description of defect. As early as the 1970s, Libby of the United States put forward the theory and application of pulsed eddy current inspection technology. However, in recent years, this technology has made some substantial progress and success in the University of Iowa in the United States, DERA in the United Kingdom and Cegely Laboratory in France, and has attracted much attention in the research and development of modern non-destructive testing technology. Compared with the traditional single-frequency sinusoidal eddy current, the pulsed eddy current has many advantages. Traditional eddy current uses sinusoidal current of a single frequency as excitation, while square wave with a certain duty cycle is used as excitation in pulsed eddy current inspection. The traditional pulsed eddy current inspection is used to analyze the steady state of the induced magnetic field, that is, to determine the position of the defect by measuring the amplitude and phase angle of the induced voltage, while the pulse eddy current is used to analyze the transient state of the induced magnetic field in time domain to detect the defect by the time when the maximum value of the induced magnetic field appears directly. In theory, pulsed eddy current can provide more information than single-frequency sinusoidal eddy current, because pulsed eddy current can provide a range of continuous multi-frequency excitation. In addition, the pulsed eddy current inspection signal responds faster than the multi-frequency eddy current signal because it runs a different current frequency at the same time.

Pulsed eddy current inspection technology is a new non-destructive testing technology for subsurface defect detection. It is a new application field of eddy current testing. It determines the location of defect by the time when the maximum magnetic field appears, so as to realize non-destructive detection and quantitative description of defect.

 As early as the 1970s, Libby of the United States put forward the theory and application of pulsed eddy current inspection technology. However, in recent years, this technology has made some substantial progress and success in the University of Iowa in the United States, DERA in the United Kingdom and Cegely Laboratory in France, and has attracted much attention in the research and development of modern non-destructive testing technology. Compared with the traditional single-frequency sinusoidal eddy current, the pulsed eddy current has many advantages.

 Traditional eddy current uses sinusoidal current of a single frequency as excitation, while square wave with a certain duty cycle is used as excitation in pulsed eddy current inspection. The traditional pulsed eddy current inspection is used to analyze the steady state of the induced magnetic field, that is, to determine the position of the defect by measuring the amplitude and phase angle of the induced voltage, while the pulse eddy current is used to analyze the transient state of the induced magnetic field in time domain to detect the defect by the time when the maximum value of the induced magnetic field appears directly. In theory, pulsed eddy current can provide more information than single-frequency sinusoidal eddy current, because pulsed eddy current can provide a range of continuous multi-frequency excitation.

 In addition, the pulsed eddy current inspection signal responds faster than the multi-frequency eddy current signal because it runs a different current frequency at the same time.

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The basic principle of the eddy current apparatus is to place the coil with alternating current on the metal plate to be measured or outside the metal tube to be measured. At this time, the alternating magnetic field will be generated in the coil and its vicinity, so that the induced alternating current in the sample will be whirlpool, which is called eddy current. The distribution and size of eddy current depends not only on the shape and size of the coil, the size and frequency of AC current, but also on the conductivity, permeability, shape and size of the specimen, the distance from the coil and the presence or absence of cracks on the surface. Therefore, under the condition of keeping other factors relatively unchanged, the change of magnetic field caused by eddy current can be measured by a detection coil. The size and phase change of eddy current in the specimen can be inferred, and then the information about the change of conductivity, defects, material condition and other physical quantities (such as shape, size, etc.) or the existence of defects can be obtained. However, because the eddy current is an alternating current and has skin effect, the detected information can only reflect the situation on or near the surface of the specimen. The application of eddy current apparatus: According to the shape of the sample and the purpose of testing, different coils can be used, usually three types: through coil, probe coil and insertion coil. The through coil is used to detect pipes, bars and wires. Its inner diameter is slightly larger than that of the tested object. When the tested object passes through the coil at a certain speed, cracks, inclusions, pits and other defects can be found. Probe coil is suitable for local detection of specimens. When applied, the coil is placed on the metal plate, tube or other parts, which can check the fatigue cracks on the inner barrel of the airplane landing pole and turbine engine blade, etc. Inserted coils, also known as internal probes, are placed in the holes of pipes or parts for inner wall detection, and can be used to check the corrosion degree of the inner walls of various pipes. In order to improve the detection sensitivity, the probe coil and the insertion coil are mostly equipped with magnetic cores. The eddy current method is mainly used for the rapid detection of metal pipes, rods and wires on production lines and for the detection of large quantities of parts such as bearing steel balls and valves (besides eddy current instruments, mechanical devices for automatic loading and unloading and transmission), material sorting and hardness measurement, as well as for the thickness measurement of coatings and coatings. Advantages of eddy current apparatus: When eddy current is detected, the coil does not need to be directly contacted with the measured object. It can carry out high-speed detection and it is easy to realize automation.

The basic principle of the eddy current apparatus is to place the coil with alternating current on the metal plate to be measured or outside the metal tube to be measured. At this time, the alternating magnetic field will be generated in the coil and its vicinity, so that the induced alternating current in the sample will be whirlpool, which is called eddy current. The distribution and size of eddy current depends not only on the shape and size of the coil, the size and frequency of AC current, but also on the conductivity, permeability, shape and size of the specimen, the distance from the coil and the presence or absence of cracks on the surface. Therefore, under the condition of keeping other factors relatively unchanged, the change of magnetic field caused by eddy current can be measured by a detection coil. The size and phase change of eddy current in the specimen can be inferred, and then the information about the change of conductivity, defects, material condition and other physical quantities (such as shape, size, etc.) or the existence of defects can be obtained. However, because the eddy current is an alternating current and has skin effect, the detected information can only reflect the situation on or near the surface of the specimen.

 The application of eddy current apparatus: According to the shape of the sample and the purpose of testing, different coils can be used, usually three types: through coil, probe coil and insertion coil. The through coil is used to detect pipes, bars and wires. Its inner diameter is slightly larger than that of the tested object. When the tested object passes through the coil at a certain speed, cracks, inclusions, pits and other defects can be found. Probe coil is suitable for local detection of specimens. When applied, the coil is placed on the metal plate, tube or other parts, which can check the fatigue cracks on the inner barrel of the airplane landing pole and turbine engine blade, etc. Inserted coils, also known as internal probes, are placed in the holes of pipes or parts for inner wall detection, and can be used to check the corrosion degree of the inner walls of various pipes. In order to improve the detection sensitivity, the probe coil and the insertion coil are mostly equipped with magnetic cores. The eddy current method is mainly used for the rapid detection of metal pipes, rods and wires on production lines and for the detection of large quantities of parts such as bearing steel balls and valves (besides eddy current instruments, mechanical devices for automatic loading and unloading and transmission), material sorting and hardness measurement, as well as for the thickness measurement of coatings and coatings.

 Advantages of eddy current apparatus: When eddy current is detected, the coil does not need to be directly contacted with the measured object. It can carry out high-speed detection and it is easy to realize automation.

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Ndt inspection equipment is widely used in industry, such as aerospace, nuclear industry, weapon manufacturing, machinery industry, shipbuilding, petrochemical industry, railway and high-speed train, automobile, boiler and pressure vessel, special equipment, customs inspection, etc. Many products need Ndt inspection equipment, especially X-ray nondestructive testing equipment. Usually, we can use X-ray for non-destructive testing of automobile parts, non-destructive testing of precision casting parts, non-destructive testing of alloy parts, non-destructive testing of cylinder head, slices, fan blades, ductile iron, compression parts, etc. X-ray can be used to detect on-line pore, inclusion, porosity and crack defects in various products. It improves yield and reduces defective products. X-ray nondestructive testing technology can be said to be widely used. The main characteristics of X-ray Ndt inspection equipment are: high resolution, high definition; small parts testing; highly integrated system, high cost performance; compact equipment, small area; high detection accuracy, small defects can be found; Higher detection image quality; Safety guarantee of equipment operation; With multi-purpose, it can customize fixture. Humanized software design, easy to operate; it is customized according to customer needs, providing solutions; all-network after-sales service platform; cloud platform, huge data, tracing the origin.

Ndt inspection equipment is widely used in industry, such as aerospace, nuclear industry, weapon manufacturing, machinery industry, shipbuilding, petrochemical industry, railway and high-speed train, automobile, boiler and pressure vessel, special equipment, customs inspection, etc.

 Many products need Ndt inspection equipment, especially X-ray nondestructive testing equipment. Usually, we can use X-ray for non-destructive testing of automobile parts, non-destructive testing of precision casting parts, non-destructive testing of alloy parts, non-destructive testing of cylinder head, slices, fan blades, ductile iron, compression parts, etc. X-ray can be used to detect on-line pore, inclusion, porosity and crack defects in various products. It improves yield and reduces defective products. X-ray nondestructive testing technology can be said to be widely used. The main characteristics of X-ray Ndt inspection equipment are: high resolution, high definition; small parts testing; highly integrated system, high cost performance; compact equipment, small area; high detection accuracy, small defects can be found; Higher detection image quality; Safety guarantee of equipment operation; With multi-purpose, it can customize fixture. Humanized software design, easy to operate; it is customized according to customer needs, providing solutions; all-network after-sales service platform; cloud platform, huge data, tracing the origin.

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Wireless Transmission Pipe Ultrasonic Flaw Detector

http://www.bkneddy.com/ultrasonic-testing-equipment/wireless-transmission-pipe-flaw-detector.html

The ultrasonic pipe testing equipment system is suitable for the automatic detection of various internal and external defects of steel pipes. The principle of ultrasonic flaw detection is that after the ultrasonic wave is coupled into the steel pipe through water, the incident propagation will cause ultrasonic reflection when there is a defect in the pipe. The ultrasonic instrument will alarm the ultrasonic reflected signal after realizing the signal to realize the automatic detection of the defect; Transmission ultrasonic pipe testing equipment is currently the advanced detection equipment in China.

Wireless Transmission Pipe Ultrasonic Flaw Detector Introduction

Rotating probe configuration

1. Probe configuration on the spindle section 1

A total of 3 probe adjustment frames are placed on section 1 at 120°apart.  Each of the adjustment frames is equipped with a 2-channel combined ultrasonic line focusing longitudinal probe to detect longitudinal defects of the steel tube in a clockwise direction.

Detection of defects: Vertical and vertical defects in the steel pipe are detected in a clockwise direction.

Center frequency: 5.0MHz±10%

Coupling method: water immersion method

Quantity: 3 sets of probes, each consisting of 2 wafers. These 3 sets of probes are evenly distributed in the circumferential direction of the workpiece, spaced 120° apart, on the same section. A total of 6 channels of water immersion probes.

2.Probe configuration on the main shaft section2

A total 3 probe adjustment frames are placed on section2, separated by120°, and a 2-channel combined ultrasonic line focusing longitudinal probe is arranged on each adjustment frame to detect longitudinal defects of the steel pipe counterclockwise.

Detection of defects: counter-clockwise detection of longitudinal defects inside and outside the steel pipe.

the center frequency: 5.0MHz ± 10%

coupling method: water immersion method

Quantity: 3 sets of probes, each consisting of 2 wafers. These 2 sets of probes are evenly distributed in the circumferential direction of the workpiece, spaced 120° apart, on the same section. A total of 6 channels of water immersion probes.

Defect detection standard

Inspection of Longitudinal and Transverse Defects in Ultrasound Steel Pipe: GB/T5777-2008 L2(C5) Standard

 Number of channels

12 channels

Flaw detection speed

40m / min

Total gain

100dB，step 0.5dB

Working mode

Single probe transmitting, receiving or dual probe

transmitting and receiving separately

Sensitivity margin

≥50dB

resolution

≥26dB

Dynamic range

≥30dB

Scanning range

0～5000mm

Frequency range

0.5～20MHz

Sampling range

250MHz

Repeat frequency

Signal channel100Hz～4KHzadjustable

Vertical linearity

≤2%

Horizontal linearity

≤1%

Detection method

Full-wave, positive half-wave , negative half-wave

Gate setting

3 gates per channel, A and B are defect gates, and c is an

Interface tracking gate

Alarm indication

Alarm color display and audible alarm for each

channel A, B, C

Delay alarm

Two ways, Delay time0.1～10S, step 0.1S waveform storage,

the unlimited number for waveform playback, printing

and report generation

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Portable Magnetic Flux Leakage Testing Equipment

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Magnetic flux leakage test refers to the formation of a leakage magnetic field on the surface of a test piece after it is magnetized due to defects on the surface or near-surface of the test piece. People can detect defects by detecting the change of leakage magnetic field with MFL testing equipment.

Briefly describe the magnetization of ferromagnetic components. In the magnetic non-destructive testing, magnetization is the first step to realize the detection, which determines whether the leakage magnetic field signal can be generated, and also affects the performance characteristics of the detection signal and the structural characteristics of the detection device.  Like magnetic particle inspection, magnetization is achieved by a magnetizer, including both a magnetic source and a magnetic circuit.

The magnetic source and the magnetic circuit change depending on the structure of the member to be tested.

What kind of magnetization can be divided into several categories? The magnetization methods can be generally divided into five categories, namely, alternating current magnetization mode, direct current magnetization mode, permanent magnet magnetization mode, composite magnetization mode, and integrated magnetization method.

What are the characteristics of magnetic flux leakage detection technology?

Because leakage magnetic field detection uses magnetic sensors to detect defects, compared with magnetic powder, penetration and other methods, it has the following advantages:

1. It is easy to realize automation. The computer judges the presence or absence of defects based on the detected signals.

2. The fundamentally high detection reliability can solve the influence of human factors in the magnetic powder and osmosis method, and has high detection reliability.  

3. can achieve preliminary quantification of defects.  In the range of wall thicknesses up to 30 mm, the inner and outer wall defects can be detected simultaneously.  In the detection of the pipeline, 5 high-efficiency, pollution-free automated inspection can achieve high detection efficiency.

BKN's portable magnetic flux leakage testing equipment are capable of detecting workpieces efficiently and accurately.

As an mfl testing equipment manufacturer and supplier, we have been committed to developing and manufacturing high-quality and high-performance NDT equipment to provide customers with the best quality service.

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MFL-7389 Tube Magnetic Flux Leakage Detector

http://www.bkneddy.com/magnetic-flux-leakage-testing-equipment/mfl-7389-tubing-magnetic-flux-leakage-detector.html

Tubing repair is an important measure to reduce the comprehensive cost of production in oil production plants to improve the quality of repairing tubing. It can ensure the quality of oil and water wells to prolong the inspection cycle, reduce the rework of operations and reduce operating costs.  

As an important process in the tubing repair test line, the flaw detection can accurately and effectively detect the defects in the manufacture and use of the inner and outer wall and the pipe body of the oil pipe to ensure the repair quality of the oil pipe.

Fundamental of MFL-7389 Tube Magnetic Flux Leakage Detector

When the detected tubing is saturated and magnetized, the magnetic field lines are distorted by the magnetic lines of force at the defect blocking defect, and a part of the magnetic lines leak out of the inner surface of the tube rod to form a leakage magnetic field, and the electromagnetic detecting method for detecting the leakage magnetic field by the detecting element is detected.  Magnetic flux leakage inspection.  

The leakage magnetic field picked up by the probe from the defect is amplified and converted into a digital signal, and then visually reflected by the flaw detector to the display to display the defect signal from the flaw detector, and directly determine the defect type and size of the detected tube rod.

¢73 and ¢89mm tubing eccentric wear and corrosion pits are detected, automatic detection, automatic alarm, automatic identification, automatic alarm.

MFL-7389 Tubing Magnetic Flux Leakage Detector Brief Introduction

Our company's new MFI tube magnetic flux leakage inspection machine has high sensitivity to very small defects. It can effectively detect defects such as corrosion pits, eccentric wear on the inner wall of the tubing, thinning of tubing wall, etc.

Moreover, the testing speed is fast and pollution-free, and the detection is fully automated. The computer display screen is used to display the detection curve, automatic alarm, marking (defect of steel pipe), grading of tubing (grade I, II and scrap).

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MFL101 Tank Floor MFL Scanner

http://www.bkneddy.com/magnetic-flux-leakage-testing-equipment/mfl101-tank-floor-mfl-scanner.html

Technical Characteristics of MFL101 Tank Floor MFL Scanner

The MFL tank floor scanner has a unique full modular structure, from the main body of the computer mechanism the handle of MFL101 Tank Floor MFL Scanner can be quickly folded, disassembled. It is easy to transport and access manholes. With humanized operation design, the height of armrest and adjustable angle, suitable for different operators. Precise signal conditioning circuit. The four-layer PCB with mixed power excellent performance. data word signal processing system, supercomputing power, advanced evaluation algorithm.

High-performance touch industrial tablet. The operation is very convenient does not require a keyboard and mouse. Unique probe design. It can pick up the magnetic flux leakage signal to overcome the unwanted signal caused by the eddy current effect. The number of physical channels is up to 32. High-performance lithium battery pack, which is at least 50% lighter than the equivalent capacity lead-acid battery Software design that can be operated efficiently.

All scan parameter settings graphical, intuitive, and easy to use, dramatically increasing the speed of operation and avoiding errors. The magnetization is quickly adjustable. By adjusting the ground clearance the magnetic pole, the magnetization of the detection target plate can be quickly changed to meet the requirements of detecting the thickness and minimize the gravity of the instrument and the bottom plate. This design allows the instrument to adapt to a wide range of floor thicknesses and reduce operator effort, increasing battery life.

Different degrees of corrosion are represented by non-color blocks. Online analysis of corrosion degree and position, position coordinates can be displayed in a table or on a scan.

MFL101 Tank Floor MFL Scanner Performance Parameters Host:

Industrial tablet computer interface:

Chinese Working principle: Magnetic flux leakage method:

NdFeB permanent magnet Channel number: 32

Scan width: 260mm

Drive mode: DC brushless motor, worm gear reducer, The motor can be raised.

Convert manual and electric drives at any time.

Detection speed: 0 m / s~0.7m /s step-less adjustable

Detection thickness: 8-20mm Penetration coating: non-magnetic

Penetration thickness: <4mm

Sensitivity: can be set (8-12mm thick 20 % material loss of the bottom plate, 40% material loss of the 12-20mm thick bottom plate

Data storage: local hard disk storage, USB disk dumping

Real-time analysis: Yes

Offline software

Battery specification: 14V40AH

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Magnetic Flux Leakage Testing Equipment

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Electromagnetic detection is a very important non-destructive testing method and is widely used. Magnetic flux leakage is a magnetic method of nondestructive testing that is used to detect corrosion and pitting in steel structures, most commonly pipelines and storage tanks.

The basic magnetic flux leakage principle is that a powerful magnet is used to magnetize the steel. When used in combination with other methods, it provides a quick and inexpensive assessment of the workpiece of ferromagnetic materials. With the advancement of technology, people are paying more and more attention to the automation of the inspection process. This not only reduces the labor intensity of the inspection work but also improves the reliability of the test results and reduces the influence of human factors.

The MFI magnetic flux leakage inspection method is a highly automated magnetic detection technology. The magnetic flux leakage principle is that after the ferromagnetic material is magnetized, the surface and near-surface defects form a leakage magnetic field on the surface of the material, and defects are detected by detecting the leakage magnetic field. In this sense, the magnetic particle detection technology commonly used in pressure vessel inspection. However, it is customary to use the method of measuring the leakage flux with a sensor as the magnetic flux leakage detection, and the magnetic flux to detect the leakage flux. The method is called magnetic particle detection and they are juxtaposed into two detection methods.

Portable Magnetic Flux Leakage Testing Equipment

Magnetic flux leakage test refers to the formation of a leakage magnetic field on the surface of a test piece after it is magnetized due to defects on the surface or near surface of the test piece.

Benchtop Magnetic Flux Leakage Testing Equipment

Magnetic flux leakage test refers to the formation of a leakage magnetic field on the surface of a test piece after it is magnetized due to defects on the surface or near surface of the test piece.

Magnetic particle testing can only detect surface and near-surface crack defects, and it needs surface grinding when testing. It is only suitable for the detection of workpiece discontinuation. In addition to the surface and near-surface crack defects, the MFI magnetic flux leakage inspection can also find the corrosion inside the workpiece from the outside. Defects such as pits, and do not need to be polished on the surface of the workpiece, suitable for on-line inspection of workpieces. On-line inspection of workpieces is currently the most urgent method for users, which can reduce unnecessary parking and reduce inspection costs. In addition, the magnetic flux leakage detection can also quantify the depth and length of defects. Although the application of magnetic flux leakage detection technology is rarely used in workpiece inspection, it has the advantages that magnetic particle detection does not have, so its application prospect is very broad.

As a non destructive testing equipment manufacturer and supplier, we have been committed to developing and manufacturing high-quality and high-performance NDT equipment to provide customers with the best quality service.

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Automatic EDM Notch

http://www.bkneddy.com/edm-notch/automatic-edm-notch/

Automatic EDM Notch is the ideal equipment for processing artificial defects of pipe rod standards in non-destructive testing work. The flaw detector has the characteristics of simple operation, safety and reliability, high production precision, fast processing speed, and convenient carrying by ultrasonic flaw detection. It can process artificial defects on non-ferrous metals and ferrous metal tubes and bar standards. Hardness sorting can process longitudinal, transverse, and oblique rectangular groove injuries on the inner and outer surfaces of the tube and rod. The core part of the equipment adopts advanced digital processing technology and system integration technology. With modern advanced digital control and servo technology, the injury process is fully automated, with high processing precision, fast speed, easy operation and performance at the international advanced level. The entire instrument is portable and easy to carry and has low requirements for the environment of steel pipe scratching.

How electronic fence works

After the pulse generator (main unit) is energized, the transmitting port sends a pulse voltage to the front fence. The time interval is about 1.5 seconds, and the pulse stays on the fence for about 0.1 second. After the loop is formed on the front fence, the pulse is returned to the host for reception. Port, this port receives the feedback pulse signal; the host also detects the resistance between the two transmitters. If the front fence is broken and the circuit is broken or shorted, the receiving port of the pulse host can not receive the pulse signal or the resistance between the two transmitters is too small, the host will issue an alarm.

Fence alarm

Through the working principle of the electronic fence, no matter what voltage working state the pulse host is in, when the fence is damaged, the receiving port can not receive the pulse signal, the pulse host will alarm; similarly, when the two electronic cables are short-circuited When the resistance is very small, the pulse master will also alarm.

As a EDM notch machine manufacturer and supplier, we have been committed to developing and manufacturing high-quality and high-performance NDT equipment to provide customers with the best quality service.

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QTXET-01 Ball Studs Eddy Current Sorting Machine

http://www.bkneddy.com/eddy-current-testing-equipment/qtxet-01-ball-studs-eddy-current-sorting-machine.html

There are two main types of ball studs: one is a combination of a spherical pin and an integral ball seat, and the other is a combination of a hemispherical ball pin and a spherical member. In the past, coil springs were used for preloading and compensating for wear. Nowadays, synthetic resin pellets with elasticity and lubrication are widely used, which reduces the cost and improves the steering stability. In addition, the material and shape of the dust cover, the type of grease, etc. have been greatly improved, the grease nipple has been eliminated, and a maintenance-free structure has been realized. The ball stud is mainly composed of an end cap, a ball pin, a ball seat and a dust cover. Ball studs are widely used in independent suspension systems, and the control arm or thrust rod is often connected to other components through a ball stud at the end. The main function of the ball pin is to achieve the up and down of the wheel and the steering movement.

The ball studs eddy current sorter is a sorting machine with high practical value in industrial applications. As one of the professional manufacturers of vortex separators, BKN Automation will introduce you to this product in this article.

QTXET-01 Ball Studs Eddy Current Sorting Machine Performance

 Detection channel

2 channel

Detection speed

10 ～ 20pieces / min

Detection position

Bulb and rod

Workpiece surface state

turning and extrusion

Calibrated crack

length 5 mm x width 0.01 mm x depth 0.2 mm

High pass

0.1Hz～650Hz

Low pass

1Hz～10000Hz

Phase rotation

0-360° step1 °

Gain

0～99dB，step size 0.1dB

Frequency ranges

10Hz～10MHz

Sampling rate

1～200000SPS adjustment

Probe drive

1%~100% adjustment

 Features of QTXET-01 Ball Studs Eddy Current Sorting Machine

Synchronized alarm output controlled by an internal and external clock

The high precision end, end to tail signal removal

High precision real-time and delayed output

Fast digital／analog electronic balance

Memory track delay blanking function

Real-time impedance display

The instrument can match any probe

Remote automatic help system

The man-machine interface in Chinese and English

Non-equal amplitude phase／amplitude alarm domain

The range of impedance diagram is adjustable in 5 grades

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Eddy Current Testing Equipment for Tube, Bar and Wire

http://www.bkneddy.com/eddy-current-testing-equipment/eddy-current-testing-equipment-tube-bar-and-wire/

ECT Eddy current testing is a non-contact testing method, which mainly uses the electromagnetic field and electromagnetic induction between metals to detect. It is one of the NDT non-destructive testing methods in the industry.

We can use different coils according to the shape of the specimen and the purpose of detection. There are usually three types of coils: through a coil, probe coil and insert coil. It is mainly used for the rapid detection of metal pipes, rods and wires on production lines, and for the detection of large quantities of parts such as bearing steel balls, valves, etc.

The main features of eddy current tester are:

1) The detection sensitivity of the surface of the conductive material and the near surface defects is high;

2) A wide range of applications can be monitored for various physical and technological factors affecting the characteristics of induced eddy currents;

3) It is easy to realize high-speed, high-efficiency and automatic detection of tubes, rods and wires without using a coupling agent;

4) Under certain conditions, it can reflect information about the crack depth;

5) Monitoring can be carried out in the case where other detection methods such as high temperature, thin-walled tubes, thin wires, and inner surface of the parts are not applicable.

Eddy current testing equipment for tube, bar and wire including BKNET-999/H Copper Tube Eddy Current Flaw Detector, GSET-551steel wire eddy current testing, BKNET-101 Automatic Eddy Current Flaw Detector, Rod Tube Rotary Eddy Current Flaw Detector ET-R-15/40/65/90, BKNET-01\02 Welded Pipe Eddy Current Flaw Detector, LGET-553 Aluminum Tube Eddy Current Flaw Detector

These equipments are mainly applicable to the surface defect detection of ferromagnetic non-ferrous metals, austenite, stainless steel tubes, rods and discs. It can be widely used for on-line or off-line  NDT non-destructive testing of raw materials in energy, petrochemical, bearing, automobile, transom manufacturing, household appliances and other industries, such as bearings, raw materials of high strength bolts, copper, aluminum tubes of various refrigeration equipment, condenser tubes of evaporators, etc. This system is the necessary testing equipment for pipe and bar and wire production and application factory. This system adopts rotating balance point probe, resolver signal coupling, synchronously adjusting double detection probe, and the detection method of workpiece passing straight line. It has the characteristics of stable and reliable performance, high detection sensitivity, fast detection speed, no need for magnetizing and demagnetizing devices, and is sensitive to defect detection of pipe, bar and wire. It can make 100% NDT non-destructive detection of raw material surface. The equipment has the functions of defect alarm, automatic feeding and unloading and automatic sorting to achieve the detection automation. It provides an effective detection means for mass production of application pipes, rods and wires in factories and enterprises to ensure quality.

BKN has eddy current machines for sale, we have been committed to developing and manufacturing high-quality and high-performance NDT equipment to provide customers with the best quality service.

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ECT For Automotive And Aerosapce

http://www.bkneddy.com/eddy-current-testing-equipment/ect-for-automotive-and-aerosapce/

NDT Application in Automotive Industry:

Eddy current testing technology has been widely used in the detection of metal components in the automotive and aerospace industry. In order to ensure the flight safety of the aircraft, the relevant components must be periodically inspected. The eddy current technology is usually used to detect aero-engine blade cracks, bolts, cracks in the screw holes, multi-layer structure of the aircraft, landing gear, wheels and aluminum skin as the main NDT non destructive testing methods. And subsurface defects, and used to detect defects in the wing joint weld. In the detection, it can effectively suppress the shaking of the probe, and the material is uneven and cause interference signals. Metal magnetic memory testing technology can be used to diagnose the stress concentration of the above components or early damage.

Due to the complex geometry of the auto parts, the equipment is required to have a high level of materials and complicated materials, requiring diverse equipment and high precision. In addition, the production of auto parts is a large industrial production, with certain beat monitoring requirements, and only by reducing the testing costs, can we reduce the automobile production and improve the competitiveness in the domestic and foreign markets. With the development of the national economy, the automobile industry has become a pillar industry in China. Therefore, non-destructive testing technology for eddy current flaw detectors for automotive parts is also receiving increasing attention from manufacturers and researchers. At present, the most widely used non-destructive testing method in the detection of automotive parts is the eddy current flaw detector ultrasonic testing method. In the ultrasonic flaw detection of eddy current flaw detectors at home and abroad, the most used type A ultrasonic flaw detector. It adopts A-type ultrasonic display, which has the advantages of simple and cheap equipment, can locate and quantify defects, and is widely used in production inspection.

However, its flaw detection results are not intuitive, no record, difficult to detect, and many human factors. Seriously affect the reliability of detection. Due to the continuous development of computer technology and electronic devices, the digital acquisition and analysis of the ultrasonic signal of the eddy current flaw detector become possible, the waveform can be recorded and preserved, and the ultrasonic detection of the eddy current flaw detector is positive digital signal processing and imaging direction development. Super-generation image technology is a remarkable new technology. The ultrasonic image of the object can provide intuitively and a large amount of information, directly reflecting the acoustic and mechanical properties of the object, and can also evaluate the mechanical properties of the microstructure of the solid material. Suddenly macroscopic discontinuities.

In short, the NDT non-destructive testing method for automotive parts eddy current flaw detector will develop with the advancement of modern high-tech, to the direction of intelligence, automation and imaging, in order to adapt to the rapid development of modern automobile manufacturing industrial parts quality inspection, testing requirements.

As a non destructive testing equipment manufacturer and supplier, we have been committed to developing and manufacturing high-quality and high-performance NDT equipment to provide customers with the best quality service.

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EDM Notch

http://www.bkneddy.com/edm-notch/

An electric pulse is a pulse generated by electrons, and a pulse is a process of changing a voltage in a short time. Electropulsing is an unsteady current field generated by a capacitor or an intermittent source. The alternating current we use can be regarded as a pulse current, and one of the cycle processes can be regarded as an electrical pulse. Modern electric pulse technology has developed to the trend of higher frequency and high energy peaks. It has a wide range of applications in materials testing, biology, medicine, nuclear energy, military and other fields. The main working principles are high energy Joule heating effect, hot pressing effect, high-frequency magnetic induction effect, electroforming and so on. Common waveforms are a rectangular, sinusoidal, rectangular, sinusoidal, group, and so on.

Automatic EDM Notch

Automatic EDM Notch is an ideal equipment for processing artificial defects of pipe rod standards in non-destructive testing work. The flaw detector has the characteristics of simple operation, safety...

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The EDM notch is mainly used for the production of standard sample tubes in the non-destructive testing industry, and is an indispensable auxiliary device for nondestructive testing. It can be used to make internal and external longitudinal defects on the sample tube, internal and external lateral defects, and can also make oblique defects at a certain angle according to different requirements of users, and can also make thickness measurement standard sample tubes or layered standard sample tubes. The shape has a U-shaped groove, a rectangular or square groove, a flat bottom hole, and the like. The machining precision is high, the speed is fast, the operation is simple, the degree of automation is high, and the machining depth can be set in one time, and the error is within the allowable tolerance range. The device is light and easy to carry, and can be used in different field environments.

The main features of the EDM Notch:

Small size, light weight and easy to carry

High power, fast scratching, less than 10% error

The distance between the internal injury position and the tube end is not limited, and the position of the wound is accurate

Single-chip control, simple operation, intelligent and efficient, practical

It is only necessary to clean the circulating oil normally, and it is basically maintenance-free

BKN offers EDM notching services, we have been committed to developing and manufacturing high-quality and high-performance NDT equipment to provide customers with the best quality service.