CN209264626U - A kind of array electromagnetism various dimensions detection system for the imaging of steel plate internal flaw - Google Patents
A kind of array electromagnetism various dimensions detection system for the imaging of steel plate internal flaw Download PDFInfo
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- CN209264626U CN209264626U CN201821968375.7U CN201821968375U CN209264626U CN 209264626 U CN209264626 U CN 209264626U CN 201821968375 U CN201821968375 U CN 201821968375U CN 209264626 U CN209264626 U CN 209264626U
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Abstract
The utility model discloses a kind of array electromagnetism various dimensions detection systems for the imaging of steel plate internal flaw, it is characterised in that: is made of 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)；Middle control module (4) control signal generating module (2) generates sinusoidal signal, via the excitation coil being transferred to after power amplifier module (3) amplification in sensing head (1), steel plate is magnetized under the cooperation of magnetic core, the leakage field information of defect is by the magnetic signal acquisition array acquisition in sensing head (1), and middle control module (4) is transferred to by IIC agreement, computer (6) are radioed to by middle control module (4) control communication module (5), show the Three-dimensional Gravity composition of defect on computer (6) by inversion algorithm.It is strong that the utility model detects fast speed, high resolution, accuracy.
Description
Technical field
The utility model provides a kind of array electromagnetism various dimensions detection system for the imaging of steel plate internal flaw, belongs to
In Electromagnetic Testing Technology 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 this utility model is to provide a kind of array electromagnetism various dimensions inspections for the imaging of steel plate internal flaw
Examining system.The utility model has array scanning, and detection speed is fast and various dimensions pick up magnetic leakage signal, and defect information includes
Comprehensively, can defect imaging the advantages of, can be using detection to the ferrimagnets internal flaw such as steel plate.
The utility model is achieved through the following technical solutions: a kind of array for the imaging of steel plate internal flaw
Electromagnetism various dimensions detection system, it is characterised in that: by sensing head, signal generating module, power amplifier module, middle control module, lead to
Believe module, computer, power supply module and motor driving module composition；Middle control module is connected with signal generating module, controls signal
Module occurs and generates low-frequency ac pumping signal, signal generating module is connected with power amplifier module, power amplifier module energy
Enough amplify the power of low-frequency ac pumping signal, power amplifier module is connected with sensing head, and sensing head is connected with middle control module
It connects, middle control module is connected with communication module and motor driving module respectively, and middle control module control communication module and computer carry out
Communication, the automation of detection device is realized by control motor driving module, and with sensing head, signal mould occurs for power supply module respectively
Block, power amplifier module, middle control module, communication module are connected with motor driving module；The sensing head is by magnetic core, excitation
Coil, magnetic signal acquisition array and sleeve composition；Excitation coil is wound on sleeve, and sleeve is placed on magnetic core the two poles of the earth, jointly
Form magnetizing assembly；The low-frequency ac excitation signal of power amplifier module transmission produces under the collective effect of magnetic core and excitation coil
Raw high-intensity magnetic field, so that tested test specimen is carried out saturated magnetization；Magnetic signal acquisition array is by 16 magneto sensors according to being arranged side by side
Mode is in one line, is placed on the centre of two magnetic poles of magnetic core, parallel with tested test specimen, and place magneto sensor one faces
Under, the relative distance between tested test specimen is 1 millimeter, and the distance range between every two magneto sensor is 0.5-1 millimeters, magnetosensitive
Element selects the three-dimensional magnetic sensor made based on Hall effect, model TLV493D-A1B6, magnetic signal acquisition array energy
Enough multidimensional magnetic leakage signals for picking up tested test specimen are transferred to middle control module, middle control module control communication mould by IIC communications protocol
Signal is radioed to computer by block, and the multidimensional magnetic leakage signal of tested test specimen shows defect by inversion algorithm on computers
Three-dimensional Gravity composition.
The signal generating module generates low-frequency ac pumping signal using DDS technology, and signal type is sinusoidal signal,
Signal frequency range is 5Hz-1000Hz, and signal amplitude range is 1V-3V；The communication module, which is selected, is based on NB-IOT/
The SIM7000C module of GPRS mechanics of communication.
The working principle of the utility model is: module, which occurs, for middle control module control signal generates a sinusoidal ac signal,
Signal carries out power amplification via power amplifier module.Signal after being amplified is applied on excitation coil, and the electric field of alternation exists
Magnetic field is generated under the collective effect of coil and magnetic core, and forms magnetic loop with air and tested test specimen.If tested test specimen be it is continuous,
Uniformly, 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
When the surface layer of material or 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 from magnetic resistance
Pass through in lesser material, when the material near defect is difficult to receive bigger magnetic flux, the part magnetic line of force can be from the portion of defect
Test specimen is overflowed in position, enters back into test specimen after passing through the air above defect, forms magnetic flux leakage outside test specimen.By being based on Hall effect
Multidimensional 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,
By the inversion algorithm on computer, the three-dimensional imaging figure of defect is obtained.
The beneficial effects of the utility model are: signal generating module and power amplifier module can by integrated chip come
It realizes, increases the integrated level of system.Sensing head uses the array structure via Parametric designing, can significantly increase detection
Speed improves resolution ratio, increases accuracy.It picks up stray field signal and uses three-dimensional magnetic sensor, can more fully collect
The information of magnetic flux leakage 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
The utility model is described in further 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
It is formed with motor driving module 8.Middle control module 4 is connected with signal generating module 2, and control signal generating module 2 generates low frequency
Ac-excited signal, signal generating module 2 are connected with power amplifier module 3, and power amplifier module 3 can amplify low-frequency ac
The power of pumping signal, power amplifier module 3 are connected with sensing head 1, and sensing head 1 is connected with middle control module 4, middle control module
4 are connected with communication module 5 and motor driving module 8 respectively, and middle control module 4 controls communication module 5 and communicated with computer 6,
By control motor driving module 8 realize detection device 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 are connected with motor driving module 8.Signal generating module 1 uses DDS
Technology generates low-frequency ac pumping signal, and using AD9833 as main chip, the signal type of generation is sinusoidal signal, signal frequency
Rate range is 5Hz-1000Hz, and signal amplitude range is 1V-3V.Signal amplification module is carried out using LM317 as main chip
The power amplification of signal.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 and set
Cylinder 12 forms.Excitation coil 10 is wound on sleeve 12, and sleeve 12 is placed on 9 the two poles of the earth of magnetic core, collectively constitutes magnetizing assembly.Magnetic
The shape of core 9 is C-shaped, and inner ring radian is 270 degree, and internal diameter is 47.5 millimeters, and for closed assembly with a thickness of 10 millimeters, magnetic core 9 is whole thick
Degree is 60 millimeters.The material iron based nano crystal of magnetic core 9 is made, sleeve 12 and magnetic core 9 fit closely, and fitting distance is less than 1 milli
Rice.The position that sleeve 12 is placed is at 9 the two poles of the earth of magnetic core, apart from 3 centimetres of yoke bottom.Excitation coil 10 selects copper enameled wire, paint
Envelope curve line footpath is 0.49 millimeter, and every side winds 300 circles.Sleeve 12 is made of 3D printing method, and material is photosensitive resin, set
The inner ring radian of cylinder 12 is 45 degree, and wall thickness is 1 millimeter.Magnetic signal acquisition array 11 is by 16 magneto sensors 13 according to being arranged side by side
Mode is in one line, is placed on the centre of 9 two magnetic poles of magnetic core, parallel with tested test specimen, places the one side of magneto sensor 13
Downward, the relative distance between tested test specimen is 1 millimeter, and the distance range between every two magneto sensor 13 is 0.7 millimeter, magnetic
Quick element 13 selects the three-dimensional magnetic sensor made based on Hall effect, model TLV493D-A1B6, magnetic signal acquisition battle array
Column 11 can pick up the multidimensional magnetic leakage signal of tested test specimen, pass through the IIC communication association being made of SDA data line and SCL clock line
View is transferred to middle control module 4, and middle control module 4 controls communication module 5 and signal is radioed to computer 6, is detected the multidimensional of test specimen
Magnetic leakage signal shows the Three-dimensional Gravity composition of defect by inversion algorithm 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) control communication 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 (2) 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821968375.7U CN209264626U (en) | 2018-11-28 | 2018-11-28 | A kind of array electromagnetism various dimensions detection system for the imaging of steel plate internal flaw |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821968375.7U CN209264626U (en) | 2018-11-28 | 2018-11-28 | A kind of array electromagnetism various dimensions detection system for the imaging of steel plate internal flaw |
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| CN209264626U true CN209264626U (en) | 2019-08-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109358110A (en) * | 2018-11-28 | 2019-02-19 | 中国计量大学 | A kind of array electromagnetism various dimensions detection system for the imaging of steel plate internal flaw |
-
2018
- 2018-11-28 CN CN201821968375.7U patent/CN209264626U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109358110A (en) * | 2018-11-28 | 2019-02-19 | 中国计量大学 | A kind of array electromagnetism various dimensions detection system for the imaging of steel plate internal flaw |
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