CN207396406U - Double difference dynamic formula pulse eddy current probe unit, array probe and detection device - Google Patents
Double difference dynamic formula pulse eddy current probe unit, array probe and detection device Download PDFInfo
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- CN207396406U CN207396406U CN201720581102.6U CN201720581102U CN207396406U CN 207396406 U CN207396406 U CN 207396406U CN 201720581102 U CN201720581102 U CN 201720581102U CN 207396406 U CN207396406 U CN 207396406U
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Abstract
The utility model is related to double difference dynamic formula pulse eddy current probe unit, array probe and detection devices.The utility model double difference dynamic formula pulse eddy current probe unit includes probing shell, terminal stud, coil rack, excitation coil, induction coil, differential amplification module and end cap.Array probe is made of 16 double difference dynamic formula pulse eddy current probe units, and fixes contact unit by probe sheath body, is connected with each other between sheath body of popping one's head in by connecting rod, is formed 4 × 4 matrix structures；As needed, contact unit quantity and array arrangement mode expansible or in change array probe.The detection device includes array probe, microcontroller, waveform generating module, signal conditioning circuit, multiplex electronics, serial communication module, data collecting card and direct-flow voltage regulation source.The Lift-off effect that the utility model can effectively inhibit in Eddy Current Nondestructive Testing influences, and improves signal-to-noise ratio and antijamming capability, and with higher detection speed, accuracy of detection and larger detection range.
Description
Technical field
The utility model is related to double difference dynamic formula pulse eddy current probe unit, array probe and detection devices, belong to probe skill
Art field.
Background technology
Impulse eddy current non-destructive testing is the important new and developing branch technology of Eddy Current Nondestructive Testing, is to develop rapidly in recent years
New detection technique, the defects of being mainly used for metal, conductor material surface, sub-surface or different depth detects.
Pulsed eddy current testing detection technique has following advantage compared with traditional eddy-current technique and other nondestructive techniques：1、
Impulse eddy current has very wide spectral range, and spectral range can be from direct current to 100KHz even more highs, so in theory
The defects of can detecting different depth position.2nd, pumping signal during Pulsed eddy current testing uses pulse square wave, makes
It is stronger that signal antijamming capability must be detected.3rd, Pulsed eddy current testing is not required to couplant compared with ultrasound, Poul Dorset Sheep, and by
Body surface is surveyed without cleaning.4th, Pulsed eddy current testing can gather substantial amounts of signal in the short period of time, this causes pulse
Eddy detection technology is easier to develop sensor array technology.
There is also some limitations for Pulsed eddy current testing：Pulsed eddy current testing is easily influenced be subject to Lift-off effect；Arteries and veins
The pulse excitation that EDDY CURRENT uses wide spectrum is rushed, it is higher to the signal-to-noise ratio of detecting system.Therefore design one kind can effectively press down
Lift-off effect processed improves signal-to-noise ratio and the probe and device of accuracy of detection are imperative.
The content of the invention
The technical problems to be solved in the utility model is：The utility model provides further to be visited by double difference dynamic formula impulse eddy current
The array probe that head unit is formed, while the detection device for including the array probe is provided, the utility model can effectively press down
Lift-off effect in Eddy Current Nondestructive Testing processed influences, and improves signal-to-noise ratio and antijamming capability, and with higher detection speed, inspection
Survey precision and larger detection range.
Double difference dynamic formula pulse eddy current probe unit provided by the utility model, including coil rack 1, excitation coil 2, sensing
Loop A 1, A2, B1, B2, differential amplification module 3, terminal stud 4, probing shell 5, end cap 6；The coil rack 1 is fine for ceramics
Dimension material is made, and probing shell 5 is ingot iron pipe；End cap 6 is made of ceramic fibre material.1 inside of coil rack
For the open-end tube with cross frame, excitation coil 2 is around in its outside, and 4 induction coils A1, A2, B1, B2 are around in its inside
On stent；Differential amplification module 3 is located above coil rack, and with sensing loop A 1, A2, B1, B2 connection；Probing shell 5 is
Pipe, terminal stud 4 are placed on its top, there is through hole among terminal stud 4, excitation coil 2, differential amplification module 3 wiring from
It is pierced by the through hole；End cap 6 is connected with 5 bottom of probing shell, will be wound with the coil rack 1 of coil and differential amplification module 3
Axial compression is enclosed in probing shell 5.
Further, the excitation coil 2 is enamel covered wire circular hollow coil, and line is high through 0.4mm, internal diameter 15mm
35mm, 180 circles；4 induction coils A1, A2, B1, B2 are identical, are enamel covered wire square coil, and line is wide through 0.2mm
10mm, high 20mm, 450 circles.
Further, described 4 induction coils A1, A2, B1, B2 differ 90 ° and are distributed in 2 inner periphery of excitation coil two-by-two
In coil rack 1, and perpendicular to 2 cross section of excitation coil；Induction coil A1, A2 and induction coil B1, B2 respectively form one group it is poor
Dynamic formula structure, i.e., each double differential structure probe contain 2 groups of differential induction coil groups.
Further, the differential amplification module 3 is made of four-way operational amplifier chip OP400, and amplification factor leads to
Overpotential device is adjusted.
Further, the utility model further provides for a kind of battle array formed using double difference dynamic formula pulse eddy current probe unit
Row probe, the array of the array probe include 16 double difference dynamic formula pulse eddy current probe units, 7,16 double difference dynamic formula pulse whirlpools
Stream contact unit 7 is fixed by array bracket 8, the matrix form of composition 4 × 4；Array bracket 8 is by 10 structure of probe sheath body 9 and connecting rod
Into；Double difference dynamic formula pulse eddy current probe unit 7 is loaded vertically into probe sheath body 9, by the screw hole I on 11 penetrating probe sheath body 9 of screw
12 fix, and probe wiring is pierced by by the through hole 13 on 9 top of probe sheath body；Each probe sheath body 9 passes through II 14 phase of screw hole by connecting rod 10
It connects；As needed, it can extend or change the contact unit quantity and array arrangement mode in array probe.
Further, the screw thread standard of the screw 11 and screw hole I 12 is M3, screw pitch 0.5mm；The connecting rod 10 and spiral shell
The screw thread standard in hole II 14 is M6, screw pitch 1.0mm；The 10 long 60mm of connecting rod.
Further, the utility model provides a kind of inspection for including the double difference dynamic formula impulse eddy current array probe simultaneously
Device is surveyed, further includes microcontroller, waveform generating module, multiplexing module, Signal-regulated kinase, serial communication module, number
According to capture card and direct-flow voltage regulation source；The microcontroller is connected by serial communication module with PC machine, by RS232 buses from
PC machine upper computer software receives instruction, and according to instruction control waveform generating module and multiplexing module；The waveform occurs
Module generates pulse excitation signal, and timesharing swashs the excitation coil timesharing in double difference dynamic formula pulse eddy current probe unit in order
It encourages, array probe generates the differential wave of 16 road Induced magnetic fields, is sent by conducting wire connection to multiplexing module input terminal；It is described
Simultaneously according to micro-controller instructions, timesharing exports 16 tunnel differential waves to signal condition electricity from public passage multiplexing module
Road input terminal；After the Signal-regulated kinase is to signal filtering process, by signal output to data collecting card, data collecting card will
Analog signal, which becomes being sent to PC machine after digital signal, to be handled, and in upper computer software display defect position and depth.
Further, the microcontroller is STC154K32S microcontrollers.The SCM anti-interference, antistatic effect compared with
By force, working environment needs are met；The microcontroller can pass through internal pulses width modulated mould with 15,6 tunnel High-Accuracy PWM simultaneously
Block generates square-wave signal, and drive waveforms occur module and generate pulse excitation signal.
Further, the waveform generating module mainly by 2N3904 triodes, 1N4007 diodes, GZ5-L solids after
Electric appliance, ADG1206 multiplexing chips are formed.The square-wave signal control triode road that microcontroller generates leads to, and opens relay
Disconnected or closure, generates pulse excitation signal.Pulse excitation signal multiplexes chip by ADG1206, and sequentially array can be visited
Single excitation coil time-sharing exciting in head.
Further, the multiplexing module mainly multiplexes chip by ADG1206 and forms；It is provided for probe matrix
16 input terminals and 1 signal multiplexing passage.16 differential outputs of array probe by the module can timesharing answered by signal
It is exported with passage to Signal-regulated kinase.
Further, the Signal-regulated kinase is made of dual operational amplifier chip LM358.Can filtering circuit carry
DC component and filter high frequency noise.
Further, the serial communication module is mainly made of MAX232 chips, realize microcontroller Transistor-Transistor Logic level with
The communication between microcontroller and PC machine is completed in the mutual conversion of PC machine RS232 level.By the DB9 interfaces of module, use
RS232 universal serial bus is connected with PC machine serial ports.
The beneficial effects of the utility model are：
(1) in double difference dynamic formula pulse eddy current probe unit, using the induction coil layout perpendicular to excitation coil cross section
Mode.In tested test specimen zero defect, induction coil, without magnetic flux, does not generate sensing electric current, that is, exports in vertical direction movement
For 0, it can effectively inhibit Lift-off effect.
(2) in double difference dynamic formula pulse eddy current probe unit, the structure design of differential type.Since its induction coil symmetrically divides
Cloth, thermal coupling, external noise, the air gap etc. disturbs all same, disturbs and will be suppressed after differential output, while also can be into one
Step eliminates the influence of Lift-off effect.So differential structure probe has higher signal-to-noise ratio and antijamming capability, sensitivity is non-
Chang Gao can detect the defects of very small.
(3) unit in double difference dynamic formula pulse eddy current probe, the vertical distribution mode of two groups of differential type induction coils overcome
Common conventional coil probe can also realize two dimensional surface two sides in length and breadth simultaneously to the dependence in defect direction during conventional detection
Upward high-precision detection, accurately identifies defective locations.
(4) double difference dynamic formula pulse eddy current probe unit is integrated with differential amplification module, makes the difference of 4 induction coil two-stages
The step of being completed by circuit, only export differential wave, reducing output quantity and host computer processing.
(5) detection efficiency and detection range of detection device greatly improved in the use of array probe.Meanwhile by specific suitable
Ordered pair contact unit time-sharing exciting, the design method of acquisition time reduce the interference between contact unit.
(6) array probe can extend or change contact unit quantity and array arrangement mode, constituted mode spirit as needed
It is living.
(7) detection device is integrated with multiplexing module, makes the input of probe matrix and output one passage of each needs
It can be completed, saved hardware corridor.
Description of the drawings
Fig. 1-2 is the double difference dynamic formula pulse eddy current probe unit elevational cross-sectional view and overhead sectional view of the utility model；
Fig. 3 is the induction coil of the utility model and excitation coil direction of winding schematic diagram；
Fig. 4 is the double difference dynamic formula pulse eddy current probe cellular construction and interface diagram of the utility model；
Fig. 5 is the differential amplification modular circuit of double difference dynamic formula pulse eddy current probe unit；
Fig. 6 is that the array probe constructive method of the utility model illustrates；
Fig. 7 is the array probe constructive method design sketch of the utility model；
Fig. 8 is the structure of the detecting device and FB(flow block) of the utility model；
Fig. 9 is the microcontroller circuit figure of detection device；
Figure 10 is the serial communication module circuit diagram of detection device；
Figure 11 is the waveform generating module circuit diagram of detection device；
Figure 12 is the multiplexing module circuit diagram of detection device；
Figure 13 is the Signal-regulated kinase circuit diagram of detection device.
Each label in Fig. 1-13：1- coil racks, 2- excitation coils, A1, A2, B1, B2- induction coil, 3- differential amplifications
Module, 4- terminal studs, 5- probing shells, 6- end caps, 7- double difference dynamic formula pulse eddy current probes unit, 8- array brackets, 9- are visited
Headgear shell, 10- connecting rods, 11- screws, 12 screw holes I, 13- through holes, 14- screw holes II.
Specific embodiment
In the following with reference to the drawings and specific embodiments, the utility model is described in further detail.
Embodiment 1：As shown in Figure 1, 2, 3, double difference dynamic formula pulse eddy current probe unit, array probe and detection device, bag
Include coil rack 1, excitation coil 2, induction coil A1, A2, B1, B2, differential amplification module 3, terminal stud 4, probing shell 5,
End cap 6；The coil rack 1 is made of ceramic fibre material, and probing shell 5 is ingot iron pipe；End cap 6 is ceramic fibre
Material is made.1 inside of coil rack is the open-end tube with cross frame, and excitation coil 2 is around in its outside, 4 sensings
Loop A 1, A2, B1, B2 are around in its medial cradle；Differential amplification module 3 is located above coil rack, and same sensing loop A 1,
A2, B1, B2 are connected；Probing shell 5 is pipe, and terminal stud 4 is placed on its top, has through hole, excitation coil among terminal stud 4
2nd, the wiring of differential amplification module 3 is pierced by from the through hole；End cap 6 is connected with 5 bottom of probing shell, will be wound with the line of coil
Ring framework 1 and 3 axial compression of differential amplification module are enclosed in probing shell 5.The line of induction perpendicular to excitation coil cross section
Circle arrangement, in tested test specimen zero defect, induction coil without magnetic flux, does not generate sensing electric current in vertical direction movement, i.e., defeated
Go out for 0, can effectively inhibit Lift-off effect.
As the further embodiment of the utility model, such as Fig. 2, Fig. 3, described 4 induction coil A1, A2, B1, B2 two
Two 90 ° of differences are distributed in the coil rack 1 of 2 inner periphery of excitation coil, and perpendicular to 2 cross section of excitation coil；Induction coil
A1, A2 and induction coil B1, B2 respectively form one group of differential structure, i.e., each double differential structure probe should containing 2 groups of differential senses
Coil group.
As shown in figure 4, there are+12V power supplies, -12V power supplies, common GND, differential output, excitation 5 wiring of input in outside；Its
In+12V power supply, -12V for electrical connection connect direct-flow voltage regulation source, give differential amplification module for power supply；Differential output wiring connections
In multiplexing module multi-channel input；Encourage the multi-channel output of input wires connection waveform generating module.
As the further embodiment of the utility model, such as Fig. 5, the differential amplification module 3 is partly led by Ya De promise (ADI)
The four-way operational amplifier chip OP400 of body company is formed, amplification factor is adjusted by potentiometer, the integrated chip 4
Low imbalance operational amplifier only needs 1 chip that can complete the Modular circuit design, saves space and cost.
Wherein operational amplifier A, B form level-one difference channel, and operational amplifier C forms two level difference channel, and computing is put
Big device D forms in-phase amplification circuit；A, the difference channel structure that B, C operational amplifier are formed is identical, by taking A as an example, if R1=R11,
R3=R7, then operational amplifier A, which exports, is：
A1, A2 induction coil form one group of difference structure access amplifier A, B1, B2 induction coil and form one group of difference structure
Access amplifier B；After two groups of differential coil voltage values do first order difference, output access amplifier C does second level difference, differentiated
Voltage signal is amplified by amplifier D, and amplification factor can pass through potentiometer R4It adjusts, the voltage differential signal of final output
For：
As the further embodiment of the utility model, such as Fig. 6, the utility model further provides for a kind of using double differential
The array probe that formula pulse eddy current probe unit is formed, the array of the array probe include 16 double difference dynamic formula impulse eddy currents and visit
7,16 double difference dynamic formula pulse eddy current probe units 7 of head unit are fixed by array bracket 8, the matrix form of composition 4 × 4；Array
Stent 8 is made of probe sheath body 9 and connecting rod 10；Double difference dynamic formula pulse eddy current probe unit 7 is loaded vertically into probe sheath body 9, by spiral shell
Screw hole I 12 on 11 penetrating probe sheath bodies 9 of silk is fixed, and probe wiring is pierced by by the through hole 13 on 9 top of probe sheath body；Each probe sheath
Shell 9 is connected with each other by connecting rod 10 by screw hole II 14；
As shown in fig. 7, as needed, it can extend or change contact unit quantity and array arrangement side in array probe
Formula.Such as can be as needed, 5 × 5 or 5 × 4 linear transducer array is formed by the method provided.
As the further embodiment of the utility model, the utility model provides a kind of comprising the double difference dynamic formula simultaneously
The detection device of impulse eddy current array probe, such as Fig. 8, it is shown that the structure of detection device and the flow entirely detected, detection dress
It puts including double difference dynamic formula impulse eddy current array probe, microcontroller, waveform generating module, multiplexing module, signal condition mould
Block, serial communication module, data collecting card and direct-flow voltage regulation source；The microcontroller is connected by serial communication module and PC machine
It connects, is received and instructed from PC machine upper computer software by RS232 buses, and according to instruction control waveform generating module and multiplexing
Module；The waveform generating module generates pulse excitation signal, and in order timesharing to double difference dynamic formula pulse eddy current probe unit
In excitation coil time-sharing exciting, array probe generate 16 road Induced magnetic fields differential wave, by conducting wire connection send to multichannel
Multiplexing module input terminal；The multiplexing module is simultaneously according to micro-controller instructions, and timesharing is 16 tunnel differential waves from public
Passage is exported to signal conditioning circuit input terminal；After the Signal-regulated kinase is to signal filtering process, by signal output to number
According to capture card, analog signal is become being sent to PC machine after digital signal by data collecting card to be handled, and is shown in upper computer software
Show defective locations and depth.
As the further embodiment of the utility model, such as Fig. 9, the microcontroller can be macrocrystalline scientific ＆ technical corporation
STC154K32S microcontrollers.The SCM anti-interference, antistatic effect are stronger, meet working environment needs；The microcontroller simultaneously
With 15,6 tunnel High-Accuracy PWM, square-wave signal can be generated by internal pulses width modulation module, module occurs for drive waveforms
Generate pulse excitation signal.STC15W4K32S is connected by I/O port P3.1, P3.0 with serial communication module, receives PC machine instruction；
Multiplexing module is controlled by I/O port P1.0~P1.4；Waveform generating module is controlled by I/O port P2.4~P2.0, P3.7.
As the further embodiment of the utility model, such as Figure 10, the serial communication module mainly believes (MAXIM) by U.S.
The MAX232 chips of company are formed, and realize the mutual conversion of microcontroller Transistor-Transistor Logic level and PC machine RS232 level, complete microcontroller
Communication between device and PC machine.T2IN, T2OUT pin of module U5 and the I/O port P3.1 of microcontroller STC15W4K32S,
P3.0 connections, and pass through the DB9 interfaces of module, it is connected using RS232 universal serial bus with PC machine serial ports.
As the further embodiment of the utility model, such as Figure 11, the waveform generating module is mainly by Ya De promise (ADI)
Multiplexer chip ADG1206, solid-state relay GZ5-L, the triode of Shanghai Chao Cheng electronics corporations of semiconductor company
2N3904, diode 1N4007 are formed.The square-wave signal that waveform generating module is exported by microcontroller, control triode Q1's
Conducting and cut-off, so as to drive relay K1's to cut-off generation pulse excitation signal；Pumping signal is from multiplexing chip U3's
Public passage D is inputted, 16 excitation coils of output terminal S1~S16 connection array probes；Microcontroller by EN, A0, A1,
A2, A3 are encoded, and selection signal exports all the way from S1~S16, so as to fulfill to single probe element excitation line in probe matrix
The order time-sharing exciting of circle.
As the further embodiment of the utility model, such as Figure 12, multiplexing module is mainly partly led by Ya De promise (ADI)
The multiplexer chip ADG1206 of body company is formed；16 tunnels of U6 chip S1~S16 receiving arrays probe of the module are poor
Dynamic output, the public passage D connection Signal-regulated kinases of U6；Microcontroller selects S1 by being encoded to EN, A0, A1, A2, A3
The input of differential wave all the way in~S16, exports to Signal-regulated kinase from public passage D, so as to fulfill more to probe matrix
The common-use tunnel acquisition time of road differential wave.
As shown in figure 13：Signal-regulated kinase by Texas Instrument (TI) company binary channels operational amplifier chip LM358
It forms, is the fourth-order band-pass wave filter that active second-order low-pass filter and active bivalent high-pass filter form.Signal condition mould
Block input terminal connects multiplexing module, output terminal connection data collecting card, and analog signal is become digital letter by data collecting card
PC machine is sent to after number to be handled.
In application, the frequency of general pulse excitation signal is 50-150Hz, pulse signals carry out Fourier transformation and understand,
The amplitude of its order harmonic component very little, there is no testing result influence.Therefore, strobe pulse pumping signal
50 times of fundamental frequency, i.e. cutoff frequencies of the 7500Hz as low-pass filter, select 50Hz as High Pass Filter Cutoff Frequency.
Wherein amplifier A forms low-pass filter, the DC component that filtering circuit carries.The amplification factor of low-pass filter
For：
In addition, cutoff frequency f0=1/2 π R16C3, quality factor q=1/ (2-R12/R2)。
Wherein amplifier B forms high-pass filter, filters out the high-frequency noise interference in signal.The amplification factor of low-pass filter
For：
In addition, cutoff frequency f0=1/2 π R19C12, quality factor q=1/ (2-R10/R9)。
Embodiment 2, the present embodiment other structures and embodiment 1 are identical, wherein as further, the excitation coil 2
Can be enamel covered wire circular hollow coil, line is through 0.4mm, internal diameter 15mm, high 35mm, 180 circles；4 induction coil A1, A2,
B1, B2 are identical, are enamel covered wire square coil, line is through 0.2mm, wide 10mm, high 20mm, 450 circles.
The screw thread standard of the screw 11 and screw hole I 12 can be M3, screw pitch 0.5mm；The connecting rod 10 and screw hole II
14 screw thread standard is M6, screw pitch 1.0mm；The 10 long 60mm of connecting rod.
Specific embodiment of the utility model is explained in detail above in conjunction with attached drawing, but the utility model and unlimited
In above-described embodiment, within the knowledge of a person skilled in the art, the utility model can also not departed from
Various changes can be made on the premise of objective.
Claims (11)
1. double difference dynamic formula pulse eddy current probe unit, it is characterised in that：Including coil rack (1), excitation coil (2), the line of induction
Enclose A1, A2, B1, B2, differential amplification module (3), terminal stud (4), probing shell (5), end cap (6)；The coil rack (1)
Inside is the open-end tube with cross frame, and excitation coil (2) is around in its outside, and 4 induction coils A1, A2, B1, B2 are around in it
In medial cradle；Differential amplification module (3) is located above coil rack, and with sensing loop A 1, A2, B1, B2 connection；Probe is outer
Shell (5) is pipe, and terminal stud (4) is placed on its top, has through hole, excitation coil (2), differential amplification among terminal stud (4)
The wiring of module (3) is pierced by from the through hole；End cap (6) is connected with probing shell (5) bottom, will be wound with the coil bone of coil
Frame (1) and differential amplification module (3) axial compression are enclosed in probing shell (5).
2. double difference dynamic formula pulse eddy current probe unit according to claim 1, it is characterised in that：The coil rack (1)
It is made of ceramic fibre material, probing shell (5) is ingot iron pipe；End cap (6) is made of ceramic fibre material.
3. double difference dynamic formula pulse eddy current probe unit according to claim 1, it is characterised in that：The excitation coil (2)
For enamel covered wire circular hollow coil, line is through 0.4mm, internal diameter 15mm, high 35mm, 180 circles；4 induction coils A1, A2, B1, B2
It is identical, it is enamel covered wire square coil, line is through 0.2mm, wide 10mm, high 20mm, 450 circles.
4. double difference dynamic formula pulse eddy current probe unit according to claim 1, it is characterised in that：4 induction coils
A1, A2, B1, B2 are differed two-by-two in 90 ° of coil racks (1) for being distributed in excitation coil (2) inner periphery, and perpendicular to excitation coil
(2) cross section；Induction coil A1, A2 and induction coil B1, B2 respectively form one group of differential structure, i.e., each double differential structure is visited
Head contains 2 groups of differential induction coil groups.
5. double difference dynamic formula pulse eddy current probe unit according to claim 1, it is characterised in that：The differential amplification module
(3) it is made of four-way operational amplifier chip OP400, amplification factor is adjusted by potentiometer.
6. a kind of array probe formed using claim 1-5 any one of them double difference dynamic formula pulse eddy current probes unit,
It is characterized in that：The array of the array probe includes 16 double difference dynamic formula pulse eddy current probe units (7), 16 double difference dynamic formulas
Pulse eddy current probe unit (7) is fixed by array bracket (8), the matrix form of composition 4 × 4；Array bracket (8) is by probe sheath body
(9) formed with connecting rod (10)；Double difference dynamic formula pulse eddy current probe unit (7) is loaded vertically into probe sheath body (9), is worn by screw (11)
The screw hole I (12) entered on sheath body of popping one's head in (9) is fixed, and probe wiring is pierced by by the through hole (13) on probe sheath body (9) top；Each probe
Sheath body (9) is connected with each other by connecting rod (10) by screw hole II (14)；As needed, it can extend or change the probe in array probe
Element number and array arrangement mode.
7. array probe according to claim 6, it is characterised in that：The screw (11) and the screw thread system of screw hole I (12)
Formula is M3, screw pitch 0.5mm；The screw thread standard of the connecting rod (10) and screw hole II (14) is M6, screw pitch 1.0mm；The connecting rod
(10) long 60mm.
8. a kind of detection device of the array probe comprising described in claim 6 or 7, it is characterised in that：Further include microcontroller,
Waveform generating module, multiplexing module, Signal-regulated kinase, serial communication module, data collecting card and direct-flow voltage regulation source；Institute
It states microcontroller to connect with PC machine by serial communication module, is received and instructed from PC machine upper computer software by RS232 buses, and
According to instruction control waveform generating module and multiplexing module；The waveform generating module generates pulse excitation signal, and presses
Order timesharing generates 16 road feel magnetisations to the excitation coil time-sharing exciting in double difference dynamic formula pulse eddy current probe unit, array probe
The differential wave of field is sent by conducting wire connection to multiplexing module input terminal；The multiplexing module is simultaneously according to micro-control
Device instruction processed, timesharing export 16 tunnel differential waves to signal conditioning circuit input terminal from public passage；The signal condition mould
After block is to signal filtering process, by signal output to data collecting card, after analog signal is become digital signal by data collecting card
PC machine is sent to be handled, and in upper computer software display defect position and depth.
9. detection device according to claim 8, it is characterised in that：The microcontroller is STC154K32S microcontrollers.
10. detection device according to claim 8, it is characterised in that：The waveform generating module is mainly by 2N3,904 tri-
Pole pipe, 1N4007 diodes, GZ5-L solid-state relays, ADG1206 multiplexing chips are formed.
11. detection device according to claim 8, it is characterised in that：The multiplexing module is mainly more by ADG1206
Road multiplexing chip is formed；The Signal-regulated kinase is made of dual operational amplifier chip LM358.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107167516A (en) * | 2017-05-24 | 2017-09-15 | 昆明理工大学 | Double difference dynamic formula pulse eddy current probe unit, array probe and detection means |
| CN109060951A (en) * | 2018-08-01 | 2018-12-21 | 中国铁道科学研究院集团有限公司金属及化学研究所 | Rail rail bottom dedicated swirl detection device |
| CN109085234A (en) * | 2018-10-22 | 2018-12-25 | 太原理工大学 | A kind of wirerope surface defect precursor in far field system |
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2017
- 2017-05-24 CN CN201720581102.6U patent/CN207396406U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107167516A (en) * | 2017-05-24 | 2017-09-15 | 昆明理工大学 | Double difference dynamic formula pulse eddy current probe unit, array probe and detection means |
| CN107167516B (en) * | 2017-05-24 | 2023-09-26 | 昆明理工大学 | Double differential pulse eddy current probe unit, array probe and detection device |
| CN109060951A (en) * | 2018-08-01 | 2018-12-21 | 中国铁道科学研究院集团有限公司金属及化学研究所 | Rail rail bottom dedicated swirl detection device |
| CN109085234A (en) * | 2018-10-22 | 2018-12-25 | 太原理工大学 | A kind of wirerope surface defect precursor in far field system |
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