CN109358110A - An Array Electromagnetic Multi-Dimensional Detection System for Internal Defect Imaging of Steel Plates - Google Patents
An Array Electromagnetic Multi-Dimensional Detection System for Internal Defect Imaging of Steel Plates Download PDFInfo
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- 238000001514 detection method Methods 0.000 title claims abstract description 30
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 21
- 230000007547 defect Effects 0.000 title claims abstract description 21
- 239000010959 steel Substances 0.000 title claims abstract description 21
- 238000003384 imaging method Methods 0.000 title claims abstract description 17
- 238000004891 communication Methods 0.000 claims abstract description 27
- 230000005284 excitation Effects 0.000 claims abstract description 13
- 238000012360 testing method Methods 0.000 claims description 18
- 238000005086 pumping Methods 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 6
- 230000005355 Hall effect Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 230000005415 magnetization Effects 0.000 claims description 2
- 229920006395 saturated elastomer Polymers 0.000 claims description 2
- 230000003321 amplification Effects 0.000 abstract description 8
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 8
- 230000004907 flux Effects 0.000 abstract description 5
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000002500 effect on skin Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002159 nanocrystal Substances 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 210000001550 testis Anatomy 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/83—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
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Abstract
本发明公开了一种用于钢板内部缺陷成像的阵列式电磁多维度检测系统，其特征在于：由传感头（1）、信号发生模块（2）、功率放大模块（3）、中控模块（4）、通信模块（5）、电脑（6）、供电模块（7）和马达驱动模块（8）组成；中控模块（4）控制信号发生模块（2）产生正弦信号，经由功率放大模块（3）放大后传输给传感头（1）中的激励线圈，在磁芯的配合下对钢板进行磁化，缺陷的漏磁信息由传感头（1）中的磁信号采集阵列采集，并通过IIC协议传输给中控模块（4），由中控模块（4）控制通讯模块（5）无线传输给电脑（6），通过反演算法在电脑（6）上显示出缺陷的三维重构图。本发明检测速度快、分辨率高、准确性强。
The invention discloses an array electromagnetic multi-dimensional detection system for imaging internal defects of steel plates, which is characterized in that: a sensor head (1), a signal generating module (2), a power amplification module (3), a central control module (4), a communication module (5), a computer (6), a power supply module (7) and a motor drive module (8); the central control module (4) controls the signal generation module (2) to generate a sinusoidal signal, which is passed through the power amplifier module. (3) After amplification, it is transmitted to the excitation coil in the sensor head (1), and the steel plate is magnetized with the cooperation of the magnetic core. The magnetic flux leakage information of the defect is collected by the magnetic signal acquisition array in the sensor head (1), and the It is transmitted to the central control module (4) through the IIC protocol, and the communication module (5) is controlled by the central control module (4) to transmit wirelessly to the computer (6), and the three-dimensional reconstruction of the defect is displayed on the computer (6) through the inversion algorithm. picture. The invention has fast detection speed, high resolution and strong accuracy.
Description
Technical field
The present invention provides a kind of array electromagnetism various dimensions detection systems for the imaging of steel plate internal flaw, belong to electricity
Magnetic testi technical field.
Background technique
Steel is common material in industry and the multiple industries of national economy, is widely used in weaponry, bridge, railway
With pipeline many aspects.Steel material detects these defects the defects of producing and can often crack in, for ensureing
Equipment reliability service and life are significant safely.Electromagnetic nondestructive testing is to develop a kind of faster lossless inspection in recent years
Survey method is that judgment basis to implement defect detection and performance test, base to material and component with the variation of material electromagnetic performance
Present principles are including the methods of leakage field, vortex and Magnetic memory testing based on the theory of electromagnetism.Steel material is due to certainly
The uniformity characteristics of the magnetic conductivity of body are not suitable for vortex large area detection.For this status, needing to design one kind being capable of needle
To the array detection system of steel material large area detection.
Based on the above background, research and develop it is a kind of can quickly detect steel plate internal flaw and can by pick up various dimensions leakage field
Signal is conducive to the speed and defect that improve steel plate defect detection to be more effectively carried out the detection system of defect imaging
The accuracy of imaging.
Summary of the invention
The purpose of the present invention is to provide a kind of array electromagnetism various dimensions detection systems for the imaging of steel plate internal flaw
System.The present invention has array scanning, and detection speed is fast and various dimensions pick up magnetic leakage signal, and defect information, can comprising comprehensive
It the advantages of defect imaging, can be using the detection to the ferrimagnets internal flaw such as steel plate.
The invention is realized by the following technical scheme: a kind of array electromagnetism for the imaging of steel plate internal flaw
Various dimensions detection system, it is characterised in that: by sensing head (1), signal generating module (2), power amplifier module (3), middle control mould
Block (4), communication module (5), computer (6), power supply module (7) and motor driving module (8) composition；Middle control module (4) and signal
Module (2) occur to be connected, control signal generating module (2) generates low-frequency ac pumping signal, signal generating module (2) and function
Rate amplification module (3) is connected, and power amplifier module (3) can amplify the power of low-frequency ac pumping signal, power amplification mould
Block (3) is connected with sensing head (1), and sensing head (1) is connected with middle control module (4), middle control module (4) respectively with communication module
(5) it is connected with motor driving module (8), middle control module (4) control communication module (5) is communicated with computer (6), passes through control
Motor driving module (8) processed realizes the automation of detection device, power supply module (7) respectively with sensing head (1), signal generating module
(2), power amplifier module (3), middle control module (4), communication module (5) are connected with motor driving module (8)；The sensing
Head (1) is made of magnetic core (9), excitation coil (10), magnetic signal acquisition array (11) and sleeve (12)；Excitation coil (10) winding
On sleeve (12), sleeve (12) is placed on magnetic core (9) the two poles of the earth, collectively constitutes magnetizing assembly；Power amplifier module (3) transmission
Low-frequency ac excitation signal generate high-intensity magnetic field under the collective effect of magnetic core (9) and excitation coil (10), to will be inspected
Part carries out saturated magnetization；Magnetic signal acquisition array (11) is in one line according to the mode of being arranged side by side by 16 magneto sensors (13),
It is placed on the centre of (9) two magnetic poles of magnetic core, parallel with tested test specimen, place magneto sensor (13) one is face-down, with quilt
Inspecting the relative distance between part is 1 millimeter, and the distance range between every two magneto sensor (13) is 0.5-1 millimeters, magnetosensitive member
Part (13) selects the three-dimensional magnetic sensor made based on Hall effect, model TLV493D-A1B6, magnetic signal acquisition array
(11) the multidimensional magnetic leakage signal that can pick up tested test specimen is transferred to middle control module (4), middle control module by IIC communications protocol
(4) signal is radioed to computer (6) by communication control module (5), and the multidimensional magnetic leakage signal of tested test specimen passes through inversion algorithm
The Three-dimensional Gravity composition of defect is shown on computer (6).
The signal generating module (1) generates low-frequency ac pumping signal using DDS technology, and signal type is sinusoidal letter
Number, signal frequency range 5Hz-1000Hz, signal amplitude range is 1V-3V；The communication module (5), which is selected, is based on NB-
The SIM7000C module of IOT/GPRS mechanics of communication.
The working principle of the invention is: middle control module control signal occurs module and generates a sinusoidal ac signal, signal
Power amplification is carried out via power amplifier module.Signal after being amplified is applied on excitation coil, and the electric field of alternation is in coil
With generate magnetic field under the collective effect of magnetic core, and form magnetic loop with air and tested test specimen.If tested test specimen is continuous, uniform
, then the magnetic line of force in material will be constrained on material internal, be pierced by almost without the magnetic line of force from the surface of material.But work as material
Surface layer or when internal existing defects, since the magnetic conductivity of defective locations is small, magnetic resistance is very big, and the magnetic line of force will be preferentially smaller from magnetic resistance
Material in pass through, when the material near defect is difficult to receive bigger magnetic flux, the part magnetic line of force can from the position of defect overflow
Test specimen out enters back into test specimen after passing through the air above defect, forms magnetic flux leakage outside test specimen.By based on the more of Hall effect
Dimension magnetic field detection sensor can pick up the information of different dimensions magnetic flux leakage, then the information of magnetic flux leakage is transferred to computer, pass through
Inversion algorithm on computer obtains the three-dimensional imaging figure of defect.
The beneficial effects of the present invention are: signal generating module and power amplifier module can be by integrated chips come real
It is existing, increase the integrated level of system.Sensing head uses the array structure via Parametric designing, can significantly increase detection speed
Degree improves resolution ratio, increases accuracy.It picks up stray field signal and uses three-dimensional magnetic sensor, can more fully collect leakage
The information in magnetic field provides more accurate signal source for defect three-dimensional imaging.The detection frequency of system is very low, in 5Hz-
Between 1000Hz, the problem due to skin effect bring flaw detection depth deficiency is efficiently avoided.Detection device and computer it
Between use NB-IOT/GPRS wireless communication mode, by computer to middle control module send control signal, by middle control module control horse
Up to drive module, realizes the automatic detection of steel plate, save manpower.
Detailed description of the invention
Fig. 1 is a kind of module frame chart of array electromagnetism various dimensions detection system for the imaging of steel plate internal flaw；
Fig. 2 is a kind of sensing head signal of array electromagnetism various dimensions detection system for the imaging of steel plate internal flaw
Figure；
Fig. 3 is a kind of magnetic signal acquisition battle array of array electromagnetism various dimensions detection system for the imaging of steel plate internal flaw
List intention.
Specific embodiment
Present invention is further described in detail with specific embodiment with reference to the accompanying drawing.
Referring to attached drawing 1, a kind of array electromagnetism various dimensions detection system for the imaging of steel plate internal flaw, feature exists
In: by sensing head (1), signal generating module (2), power amplifier module (3), middle control module (4), communication module (5), computer
(6), power supply module (7) and motor driving module (8) composition.Middle control module (4) is connected with signal generating module (2), control
Signal generating module (2) generates low-frequency ac pumping signal, and signal generating module (2) is connected with power amplifier module (3), function
Rate amplification module (3) can amplify the power of low-frequency ac pumping signal, and power amplifier module (3) is connected with sensing head (1),
Sensing head (1) is connected with middle control module (4), middle control module (4) respectively with communication module (5) and motor driving module (8) phase
Connection, middle control module (4) control communication module (5) are communicated with computer (6), are realized by control motor driving module (8)
The automation of detection device, power supply module (7) respectively with sensing head (1), signal generating module (2), power amplifier module (3),
Middle control module (4), communication module (5) are connected with motor driving module (8).Signal generating module (1) is generated using DDS technology
Low-frequency ac pumping signal, using AD9833 as main chip, the signal type of generation is sinusoidal signal, and signal frequency range is
5Hz-1000Hz, signal amplitude range are 1V-3V.Signal amplification module carries out the function of signal using LM317 as main chip
Rate amplification.Communication module (5) selects the SIM7000C module based on NB-IOT/GPRS mechanics of communication.
Referring to attached drawing 2, attached drawing 3, the sensing head (1) is by magnetic core (9), excitation coil (10), magnetic signal acquisition array
(11) it is formed with sleeve (12).Excitation coil (10) is wound on sleeve (12), and sleeve (12) is placed on magnetic core (9) the two poles of the earth,
Collectively constitute magnetizing assembly.The shape of magnetic core (9) is C-shaped, and inner ring radian is 270 degree, and internal diameter is 47.5 millimeters, closed assembly thickness
It is 10 millimeters, magnetic core (9) integral thickness is 60 millimeters.Make the material iron based nano crystal of magnetic core (9), sleeve (12) and magnetic core
(9) it fits closely, is bonded distance less than 1 millimeter.The position that sleeve (12) is placed is at magnetic core (9) the two poles of the earth, apart from yoke bottom 3
Centimetre.Excitation coil (10) selects copper enameled wire, and enameled wire line footpath is 0.49 millimeter, and every side winds 300 circles.Sleeve (12) is adopted
It is made of 3D printing method, material is photosensitive resin, and the inner ring radian of sleeve (12) is 45 degree, and wall thickness is 1 millimeter.Magnetic signal
Acquisition array (11) is in one line according to the mode of being arranged side by side by 16 magneto sensors (13), is placed on (9) two magnetic poles of magnetic core
Centre, it is parallel with tested test specimen, place magneto sensor (13) one down, the relative distance between tested test specimen is
1 millimeter, the distance range between every two magneto sensor (13) is 0.7 millimeter, and magneto sensor (13) selects the Hall effect system of being based on
The three-dimensional magnetic sensor of work, model TLV493D-A1B6, magnetic signal acquisition array (11) can pick up the more of tested test specimen
Magnetic leakage signal is tieed up, middle control module (4), middle control are transferred to by the IIC communications protocol being made of SDA data line and SCL clock line
Signal is radioed to computer (6) by module (4) communication control module (5), and the multidimensional magnetic leakage signal of tested test specimen passes through inverting
Algorithm shows the Three-dimensional Gravity composition of defect on computer (6).
Claims (2)
1. a kind of array electromagnetism various dimensions detection system for the imaging of steel plate internal flaw, it is characterised in that: by sensing head
(1), signal generating module (2), power amplifier module (3), middle control module (4), communication module (5), computer (6), power supply module
(7) it is formed with motor driving module (8)；Middle control module (4) is connected with signal generating module (2), controls signal generating module
(2) low-frequency ac pumping signal is generated, signal generating module (2) is connected with power amplifier module (3), power amplifier module
(3) power of low-frequency ac pumping signal can be amplified, power amplifier module (3) is connected with sensing head (1), sensing head (1)
It is connected with middle control module (4), middle control module (4) is connected with communication module (5) and motor driving module (8) respectively, middle control
Module (4) control communication module (5) is communicated with computer (6), realizes detection device by control motor driving module (8)
Automation, power supply module (7) respectively with sensing head (1), signal generating module (2), power amplifier module (3), middle control module
(4), communication module (5) is connected with motor driving module (8)；The sensing head (1) by magnetic core (9), excitation coil (10),
Magnetic signal acquisition array (11) and sleeve (12) composition；Excitation coil (10) is wound on sleeve (12), and sleeve (12) is placed on
On magnetic core (9) the two poles of the earth, magnetizing assembly is collectively constituted；The low-frequency ac excitation signal of power amplifier module (3) transmission is in magnetic core (9)
High-intensity magnetic field is generated under the collective effect of excitation coil (10), so that tested test specimen is carried out saturated magnetization；Magnetic signal acquisition battle array
Column (11) are in one line according to the mode of being arranged side by side by 16 magneto sensors (13), are placed on the center of (9) two magnetic poles of magnetic core
Centre, parallel with tested test specimen, place magneto sensor (13) one is face-down, and the relative distance between tested test specimen is 1 millimeter,
Distance range between every two magneto sensor (13) is 0.5-1 millimeters, and magneto sensor (13) selection is made based on Hall effect
Three-dimensional magnetic sensor, model TLV493D-A1B6, magnetic signal acquisition array (11) can pick up the multidimensional leakage of tested test specimen
Magnetic signal is transferred to middle control module (4) by IIC communications protocol, and middle control module (4) communication control module (5) is wireless by signal
Computer (6) are transferred to, the multidimensional magnetic leakage signal of tested test specimen shows the Three-dimensional Gravity of defect by inversion algorithm on computer (6)
Composition.
2. a kind of array electromagnetism various dimensions detection system for the imaging of steel plate internal flaw according to claim 1,
It is characterized by: the signal generating module (1) generates low-frequency ac pumping signal using DDS technology, signal type is positive
String signal, signal frequency range 5Hz-1000Hz, signal amplitude range are 1V-3V；Communication module (5) selection is based on
The SIM7000C module of NB-IOT/GPRS mechanics of communication.
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| CN110018230A (en) * | 2019-05-29 | 2019-07-16 | 中国计量大学 | A kind of magnetic field detection and imaging system of steel plate deformation |
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| CN110045005A (en) * | 2019-05-31 | 2019-07-23 | 中国计量大学 | A kind of pipe surface lift-off height adaptive magnetic leakage detection system |
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| CN110018230A (en) * | 2019-05-29 | 2019-07-16 | 中国计量大学 | A kind of magnetic field detection and imaging system of steel plate deformation |
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| CN110018231A (en) * | 2019-05-29 | 2019-07-16 | 中国计量大学 | One kind being based on low frequency leakage field thimble tube pipe crack detector |
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| CN110045010A (en) * | 2019-05-31 | 2019-07-23 | 中国计量大学 | Phase difference low frequency electromagnetic non-destructive testing trolley |
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| CN110412119A (en) * | 2019-05-31 | 2019-11-05 | 中国计量大学 | A low-frequency magnetic flux leakage detection flaw detection system based on white light interference |
| CN110045008A (en) * | 2019-06-01 | 2019-07-23 | 中国计量大学 | A kind of detection of magnetic field system that 20# thickness of steel pipe is thinned |
| CN113390957A (en) * | 2021-04-27 | 2021-09-14 | 杭州电子科技大学 | Anti-crosstalk eddy current nondestructive flaw detection system based on magnetic sensing probe |
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