CN203745420U - Automatic double-exciting-coil conductor flaw detection device - Google Patents
Automatic double-exciting-coil conductor flaw detection device Download PDFInfo
- Publication number
- CN203745420U CN203745420U CN201420121358.5U CN201420121358U CN203745420U CN 203745420 U CN203745420 U CN 203745420U CN 201420121358 U CN201420121358 U CN 201420121358U CN 203745420 U CN203745420 U CN 203745420U
- Authority
- CN
- China
- Prior art keywords
- detecting plate
- giant magneto
- flaw detection
- drive coil
- chip microcomputer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model relates to an automatic double-exciting-coil conductor flaw detection device which comprises a power trolley, a single-chip microcomputer, detection plates, exciting coils, giant magneto resistive sensors and a relay, wherein the single-chip microcomputer is arranged inside the power trolley; the detection plates are arranged at one end of the bottom surface of the power trolley; two ends of the detection plates are in elastic connection with the bottom surface of the power trolley respectively through springs; the relay is connected with the detection plates and can control two sides of the detection plates to turn over downwards; two exciting coils are fixed to the detection plates, and are symmetrically arranged on the detection plates; the giant magneto resistive sensors are respectively arranged in the two exciting coils; the bottom surfaces of the giant magneto resistive sensors and the bottom ends of the exciting coils are positioned on the same horizontal plane, and the giant magneto resistive sensors are electrically connected with the single-chip microcomputer. The automatic double-exciting-coil conductor flaw detection device effectively improves the detection capacity of the system to deep flaws and tiny surface flaws, is high in detection precision and efficiency, and has popularization and application value.
Description
Technical field
The utility model relates to technical field of nondestructive testing, relates in particular to a kind of two drive coil defect in conductor automatic flaw detection device.
Background technology
The effect that Dynamic Non-Destruction Measurement is brought into play in quality assurance system more and more shows its importance and necessity, becomes the important means of controlling product quality, ensureing in-service equipment safety operation.The methods such as the conventional ultrasound wave of Non-Destructive Testing at present, X-ray, current vortex.UT (Ultrasonic Testing) detects as manual operation, and UT (Ultrasonic Testing) is not directly perceived to the demonstration of defect, needs couplant, inspection technique difficulty is large, easily be subject to subjective and objective factor impact, require exper ienced reviewer just can distinguish defect kind, be suitable for the component test that thickness is larger; Radiographic inspection has the even certain injury of spinoff to human body, and other allergens are had to ill-effect, and environment is had to radiation pollution; And current common current vortex flaw detection, owing to using unicoil technology, does not have the contrast of defect and non-defect, sensitivity is lower.
Utility model content
The technical problems to be solved in the utility model is: for provide a kind of simple in structure, easy to operate, detect accurately, two drive coil defect in conductor automatic flaw detection devices that detection efficiency is high.
The utility model solves the technical scheme that its technical matters adopts: a kind of two drive coil defect in conductor automatic flaw detection devices, comprise power buggy, single-chip microcomputer, detecting plate, drive coil, giant magneto-resistance sensor and relay, described single-chip microcomputer is arranged on power buggy inside, described detecting plate is arranged on one end of power buggy bottom surface, detecting plate two ends are connected with power buggy bottom surface elasticity by spring respectively, described relay is connected with detecting plate and can controls detecting plate both sides and overturn downwards, on described detecting plate, be fixed with two drive coils, two drive coils are symmetricly set on detecting plate, in two drive coils, be respectively arranged with giant magneto-resistance sensor, described giant magneto-resistance sensor bottom surface and drive coil bottom are in same level, giant magneto-resistance sensor is electrically connected with single-chip microcomputer.
In described power buggy, be evenly provided with three rollers, roller is embedded in the groove of power buggy, and described roller is connected with direct current generator, and direct current generator is moved or turned to by roller control power buggy.
Described detecting plate comprises left detecting plate and right detecting plate, between left detecting plate and right detecting plate, is provided with bearing pin, and left detecting plate, right detecting plate connect around bearing pin upset respectively.
The utility model also provides the method for detection of a kind of pair of drive coil defect in conductor automatic flaw detection device, comprises the steps:
Step 1: after normal power-up, direct current generator drives power buggy to travel to region to be measured;
Step 2: relay presses down the detecting plate left and right sides, makes two groups of drive coils and giant magneto-resistance sensor be close to respectively plane to be measured;
Step 3: high frequency or medium frequency alternating current after the logical inversion of two drive coils, now single-chip microcomputer start signal gathers, if region surface to be measured or inner defectiveness, the magnetic field size that in region to be measured, eddy current causes can change, because the variation of magnetic flux makes the output voltage of both sides giant magneto-resistance sensor different, judge that through differential comparator region to be measured defectiveness exists and reports to the police herein, otherwise power buggy normally advances;
Step 4: in the time that power buggy runs to the region to be measured end, because giant magneto-resistance sensor does not receive the signal that eddy current causes, direct current generator drives power buggy to turn to, and continues to survey, and above step repeats.
Principle of the present utility model is: be formed by stacking by two parts at the electromagnetic field producing around drive coil: a part is the electromagnetic field being directly coupled out from coil, another part is the secondary electromagnetic field that the eddy current place that induces in detected element produces, and the information such as thickness or defect that the latter has comprised detected element itself.Take suitable detection method, secondary field is measured, and this measuring-signal is analyzed, can obtain detected element information.In the time that alternating current passes into drive coil, if voltage used and frequency are constant, the electric current by drive coil is also by constant.If put into giant magneto-resistance sensor in drive coil, giant magneto-resistance sensor is close to tested plane, and tested region surface produces circumferential electric current, i.e. eddy current.Eddy current magnetism direction is contrary with the direction of magnetization of impressed current, therefore will offset a part of impressed current, thus make drive coil magnetic flux, impedance, all change by the sized phases of electric current.When the variation of thickness, conductivity and the magnetic permeability of tested plane and defectiveness exist, all can affect the magnetic flux in drive coil.If maintenance ceteris paribus only causes defect that the signal of magnetic flux change takes out, through instrument amplification and give detection, just can reach flaw detection object.Eddy current signal can not only provide the size of defect, during simultaneously due to eddy current test, can lag behind surface eddy one phase bit according to subsurface eddy current, adopts phase analysis can judge the position (degree of depth) of defect.In eddy-current test, for more accurately flaw detection, adopt two built-in giant magnetoresistances of drive coil to be connected into differential form.Basic circuit is made up of oscillator, magnetic test coil signal output apparatus, amplifier, signal processor, display and power supply.
The beneficial effects of the utility model are: the two drive coil defect in conductor automatic flaw detection devices of the utility model produce ac-excited eddy current magnetism as core taking two drive coils, adopt two giant magneto-resistance sensor detecting elements to reach the effect of full-automatic differential high sensitivity detection conducting plane defect, effectively improve the detectability of system to deep zone defect and surperficial tiny flaw, accuracy of detection is high, efficiency is high, has popularizing value.
Brief description of the drawings
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is the perspective view of a preferred embodiment of the two drive coil defect in conductor automatic flaw detection devices of the utility model;
Fig. 2 is the side view of the two drive coil defect in conductor automatic flaw detection devices of the utility model;
Fig. 3 is the local enlarged diagram of I part in Fig. 2;
In figure: 1. power buggy, 2. roller, 3. direct current generator, 4. detecting plate, 5. drive coil, 6. giant magneto-resistance sensor, 7. spring.
Embodiment
By reference to the accompanying drawings the utility model is described in further detail now.These accompanying drawings are the schematic diagram of simplification, and basic structure of the present utility model is only described in a schematic way, and therefore it only shows the formation relevant with the utility model.
As Figure 1-3, a kind of two drive coil defect in conductor automatic flaw detection device, comprise power buggy 1, single-chip microcomputer, detecting plate 4, drive coil 5, giant magneto-resistance sensor 6 and relay, described single-chip microcomputer is arranged on power buggy 1 inside, described detecting plate 4 is arranged on one end of power buggy 1 bottom surface, detecting plate 4 two ends are connected with power buggy 1 bottom surface elasticity by spring 7 respectively, described relay is connected with detecting plate 4 and can controls detecting plate 4 both sides and overturn downwards, on described detecting plate 4, be fixed with two drive coils 5, two drive coils 5 are symmetricly set on detecting plate 4, in two drive coils 5, be respectively arranged with giant magneto-resistance sensor 6, described giant magneto-resistance sensor 6 bottom surfaces and drive coil 5 bottoms are in same level, giant magneto-resistance sensor 6 is electrically connected with single-chip microcomputer.
Interior 2, three rollers 2 of three rollers that are evenly provided with of described power buggy 1 are triangle setting, and roller 2 is embedded in the groove of power buggy 1, and described roller 2 is connected with direct current generator 3, and direct current generator 3 is controlled power buggy 1 by roller 2 and moved or turn to.
Described detecting plate 4 comprises left detecting plate and right detecting plate, between left detecting plate and right detecting plate, be provided with bearing pin, left detecting plate, right detecting plate connect around bearing pin upset respectively, are fixed with respectively a drive coil 5 and giant magneto-resistance sensor 6 on left detecting plate, right detecting plate.
The utility model also provides the method for detection of a kind of pair of drive coil defect in conductor automatic flaw detection device, comprises the steps:
Step 1: after normal power-up, direct current generator 3 drives power buggy 1 to travel to region to be measured;
Step 2: relay presses down detecting plate 4 left and right sides, makes two groups of drive coils 5 and giant magneto-resistance sensor 6 be close to respectively plane to be measured;
Step 3: high frequency or medium frequency alternating current after the logical inversion of two drive coils 5, now single-chip microcomputer start signal gathers, if region surface to be measured or inner defectiveness, the magnetic field size that in region to be measured, eddy current causes can change, because the variation of magnetic flux makes the output voltage of both sides giant magneto-resistance sensor 6 different, judge that through differential comparator region to be measured defectiveness exists and reports to the police herein, otherwise power buggy 1 normally advances;
Step 4: in the time that power buggy 1 runs to the region to be measured end, because giant magneto-resistance sensor 6 does not receive the signal that eddy current causes, direct current generator 3 drives power buggy 1 to turn to, continues to survey, and above step repeats.
Wherein, feed circuit power supply can adopt civil power (needing rectification) or battery, and wherein Single-chip Controlling acquisition system and direct current generator are supplied with in a road, and two drive coils 5 are supplied with on another road after being reverse into alternating current, is used for excitation conductor generation current vortex.
When detection, opening power, two relays are respectively by left detecting plate, right detecting plate presses down, left detecting plate, right detecting plate overturns downwards around bearing pin, drive two drive coils 5, two giant magneto-resistance sensors 6 press down and are close to plane to be measured, high frequency or medium frequency alternating current after the logical inversion of two drive coils 5, thereby direct current generator 3 driving rollss roll and drive power buggy 1 to advance, power buggy 1 moves ahead along region surface to be measured, now single-chip microcomputer start signal gathers, if region surface to be measured or inner defectiveness, the magnetic field size that in region to be measured, eddy current causes can change, because the variation of magnetic flux makes the output voltage of both sides giant magneto-resistance sensor 6 different, judge that through differential comparator region to be measured defectiveness exists and reports to the police herein, otherwise power buggy 1 normally advances, when power buggy 1 runs to after the end of region to be measured, direct current generator 3 drives dolly to turn to, continue to survey, until whole region to be measured is detected complete, now left detecting plate, right detecting plate loses the acting force of relay, due to the elasticity of spring 7, left detecting plate, right detecting plate drives two drive coils 5, two giant magneto-resistance sensors 6 reset, leave plane to be measured.
Compared with prior art, the two drive coil defect in conductor automatic flaw detection devices of the utility model produce ac-excited eddy current magnetism as core taking two drive coils 5, adopt two giant magneto-resistance sensor 6 detecting elements to reach the effect of full-automatic differential high sensitivity detection conducting plane defect, effectively improve the detectability of system to deep zone defect and surperficial tiny flaw, accuracy of detection is high, efficiency is high, has popularizing value.
Taking above-mentioned foundation desirable embodiment of the present utility model as enlightenment, by above-mentioned description, relevant staff can, not departing from the scope of this utility model technological thought, carry out various change and amendment completely.The technical scope of this utility model is not limited to the content on instructions, must determine its technical scope according to claim scope.
Claims (3)
1. a two drive coil defect in conductor automatic flaw detection device, it is characterized in that: comprise power buggy, single-chip microcomputer, detecting plate, drive coil, giant magneto-resistance sensor and relay, described single-chip microcomputer is arranged on power buggy inside, described detecting plate is arranged on one end of power buggy bottom surface, detecting plate two ends are connected with power buggy bottom surface elasticity by spring respectively, described relay is connected with detecting plate and can controls detecting plate both sides and overturn downwards, on described detecting plate, be fixed with two drive coils, two drive coils are symmetricly set on detecting plate, in two drive coils, be respectively arranged with giant magneto-resistance sensor, described giant magneto-resistance sensor bottom surface and drive coil bottom are in same level, giant magneto-resistance sensor is electrically connected with single-chip microcomputer.
2. as claimed in claim 1 pair of drive coil defect in conductor automatic flaw detection device, is characterized in that: in described power buggy, be evenly provided with some rollers, described roller is connected with direct current generator.
3. as claimed in claim 1 pair of drive coil defect in conductor automatic flaw detection device, it is characterized in that: described detecting plate comprises left detecting plate and right detecting plate, between left detecting plate and right detecting plate, be provided with bearing pin, left detecting plate, right detecting plate connect around bearing pin upset respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420121358.5U CN203745420U (en) | 2014-03-18 | 2014-03-18 | Automatic double-exciting-coil conductor flaw detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420121358.5U CN203745420U (en) | 2014-03-18 | 2014-03-18 | Automatic double-exciting-coil conductor flaw detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203745420U true CN203745420U (en) | 2014-07-30 |
Family
ID=51345205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420121358.5U Expired - Fee Related CN203745420U (en) | 2014-03-18 | 2014-03-18 | Automatic double-exciting-coil conductor flaw detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203745420U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103822967A (en) * | 2014-03-18 | 2014-05-28 | 江苏理工学院 | Automatic dual-exciting-coil conductor defect flaw detection device and method |
-
2014
- 2014-03-18 CN CN201420121358.5U patent/CN203745420U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103822967A (en) * | 2014-03-18 | 2014-05-28 | 江苏理工学院 | Automatic dual-exciting-coil conductor defect flaw detection device and method |
| CN103822967B (en) * | 2014-03-18 | 2016-09-14 | 江苏理工学院 | Double excitation coil-conductor defect automatic flaw detection device and method of detection |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103822967A (en) | Automatic dual-exciting-coil conductor defect flaw detection device and method | |
| CN103499404B (en) | Ferromagnetic component alterante stress measurement mechanism and measuring method thereof | |
| Rocha et al. | Magnetic sensors assessment in velocity induced eddy current testing | |
| CN103163216B (en) | A kind of metallic conductor defect recognition based on giant magnetoresistance sensor and method of estimation | |
| CN1985164B (en) | Method and device for testing pipes in a non-destructive manner | |
| CN103954684B (en) | A kind of method utilizing leakage field rate of change to carry out Non-Destructive Testing | |
| CN103499636B (en) | Based on the lossless detection method of microdefect in the thin plate class ferromagnetic material of the magnetostatic power of survey | |
| CN102759567A (en) | Eddy current testing recognition and evaluation method for defects of inner wall and outer wall of steel pipe under direct current magnetization | |
| CN104655718A (en) | Electromagnetic inspection method based on hall sensor array and electromagnetic inspection system based on hall sensor array | |
| CN104297338A (en) | Pulse eddy current detecting system based on rectangular difference probe | |
| Rocha et al. | Studies to optimize the probe response for velocity induced eddy current testing in aluminium | |
| CN104049031A (en) | Subsurface defect detection device and method based on alternative current electromagnetic field | |
| CN204255904U (en) | Based on the Pulsed Eddy Current Testing System of rectangle difference detector | |
| CN104165923A (en) | Nondestructive flaw detection device for metal wire/pipe | |
| CN203908994U (en) | Pulse flux leakage flaw detector | |
| Feng et al. | Three-axis magnetic flux leakage in-line inspection simulation based on finite-element analysis | |
| CN102879420A (en) | Method for detecting defect of ferromagnetic material with high resistivity | |
| CN203745420U (en) | Automatic double-exciting-coil conductor flaw detection device | |
| CN106370723A (en) | Special metal equipment damage detection system based on low-frequency eddy current | |
| Rocha et al. | Sub-surface defect detection with motion induced eddy currents in aluminium | |
| CN113030241B (en) | Device and method for distinguishing magnetic flux leakage detection signals of inner wall and outer wall of steel pipe in use | |
| CN104126117A (en) | Eddy-current inspection method and device | |
| Liu et al. | Rail defect inspection using alternating current excitation coils with digital demodulation algorithm | |
| CN203350226U (en) | Magnetic flaw detection sensor based on giant magnetoresistance elements | |
| CN105548344A (en) | Leakage flux and induction current based rail nondestructive testing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140730 Termination date: 20160318 |