CN103822967B - Double excitation coil-conductor defect automatic flaw detection device and method of detection - Google Patents
Double excitation coil-conductor defect automatic flaw detection device and method of detection Download PDFInfo
- Publication number
- CN103822967B CN103822967B CN201410099707.2A CN201410099707A CN103822967B CN 103822967 B CN103822967 B CN 103822967B CN 201410099707 A CN201410099707 A CN 201410099707A CN 103822967 B CN103822967 B CN 103822967B
- Authority
- CN
- China
- Prior art keywords
- detecting plate
- excitation coil
- resistance sensor
- giant magneto
- power buggy
- 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.)
- Active
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The present invention relates to a kind of double excitation coil-conductor defect automatic flaw detection device and method of detection, including power buggy, single-chip microcomputer, detecting plate, excitation coil, giant magneto-resistance sensor and relay, described single-chip microcomputer is arranged on inside power buggy, 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 control detecting plate both sides and downwardly turns over, two excitation coils it are fixed with on described detecting plate, two excitation coils are symmetricly set on detecting plate, it is respectively arranged with giant magneto-resistance sensor in two excitation coils, described giant magneto-resistance sensor bottom surface and excitation coil bottom are in same level, giant magneto-resistance sensor electrically connects with single-chip microcomputer.This double excitation coil-conductor defect automatic flaw detection device and method of detection are effectively improved system to deep zone defect and the power of test of surface tiny flaw, and accuracy of detection is high, efficiency is high, has popularizing value.
Description
Technical field
The present invention relates to technical field of nondestructive testing, particularly relate to a kind of double excitation coil-conductor defect automatic flaw detection device and method of detection.
Background technology
The effect that Dynamic Non-Destruction Measurement plays in quality assurance system increasingly shows its importance and necessity, the important means become and control product quality, ensureing in-service equipment safety operation.The methods such as ultrasound wave, X-ray, current vortex are commonly used in Non-Destructive Testing at present.Ultrasonic examination is detected as manual operation, and ultrasonic examination is not directly perceived to the display of defect, needs couplant, inspection technique difficulty is big, it is easily subject to subjective and objective factor impact, it is desirable to exper ienced reviewer just can distinguish defect kind, is suitable for the component test that thickness is bigger；Radiographic inspection has the injury that side effect is the most certain to human body, other allergens is had ill effect, environment is had radiation pollution；And current common current vortex flaw detection, owing to using unicoil technology, there is no the contrast of defect and non-defective, sensitivity is relatively low.
Summary of the invention
The technical problem to be solved in the present invention is: in order to provide a kind of simple in construction, easy to operate, detection accurately, the high double excitation coil-conductor defect automatic flaw detection device of detection efficiency and method of detection.
The technical solution adopted for the present invention to solve the technical problems is: a kind of double excitation coil-conductor defect automatic flaw detection device, including power buggy, single-chip microcomputer, detecting plate, excitation coil, giant magneto-resistance sensor and relay, described single-chip microcomputer is arranged on inside power buggy, 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 control detecting plate both sides and downwardly turns over, two excitation coils it are fixed with on described detecting plate, two excitation coils are symmetricly set on detecting plate, it is respectively arranged with giant magneto-resistance sensor in two excitation coils, described giant magneto-resistance sensor bottom surface and excitation coil bottom are in same level, giant magneto-resistance sensor electrically connects with single-chip microcomputer.
Being evenly arranged with three rollers in described power buggy, roller is embedded in the groove of power buggy, and described roller is connected with direct current generator, and direct current generator controls power buggy by roller and moves or turn to.
Described detecting plate includes being provided with between left detecting plate and right detecting plate, left detecting plate and right detecting plate bearing pin, and left detecting plate, right detecting plate connect rotating around bearing pin upset.
The present invention also provides for the method for detection of a kind of double excitation coil-conductor defect automatic flaw detection device, comprises the steps:
Step one: after normal power-up, DC motor Driver power buggy travels to region to be measured；
Step 2: relay will be pressed under the detecting plate left and right sides, makes two groups of excitation coils and giant magneto-resistance sensor be close to plane to be measured respectively；
Step 3: two excitation coils lead to the high frequency after inversion or medium frequency alternating current, now signals collecting opened by single-chip microcomputer, if region surface to be measured or internal defective, the magnetic field size that in region the most to be measured, eddy current causes can change, owing to the change of magnetic flux makes the output voltage of both sides giant magneto-resistance sensor different, judging the defective existence in region the most to be measured through differential comparator and report to the police, otherwise power buggy normally advances；
Step 4: when power buggy runs to the region end to be measured, owing to giant magneto-resistance sensor does not receives the signal that eddy current causes, DC motor Driver power buggy turns to, and continues detection, and above step repeats.
The principle of the present invention is: the electromagnetic field produced around excitation coil is formed by stacking by two parts: a part is the electromagnetic field being directly coupled out from coil, another part is secondary electromagnetic field produced by the vortex field induced in detected element, and the latter contains the information such as thickness or the defect of detected element itself.Take suitable detection method, secondary field is measured, and this measurement signal is analyzed, available detected element information.When alternating current is passed through excitation coil, if voltage used and frequency are constant, then by the electric current of excitation coil also by constant.If putting into giant magneto-resistance sensor in excitation coil, giant magneto-resistance sensor is close to tested plane, and tested region surface produces circumference 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, so that the magnetic flux of excitation coil, impedance, all being changed by the sized phases of electric current.The change of the thickness of tested plane, electrical conductivity and pcrmeability and defective in the presence of, all can affect the magnetic flux in excitation coil.If holding ceteris paribus, defect only causes the signal of magnetic flux change take out, through instrument amplification and give detection, just can reach purpose of detecting a flaw.Eddy current signal can not only provide the size of defect, simultaneously because can lag behind surface eddy one phase bit according to subsurface eddy current during eddy current inspection, uses phase analysis can judge the position (degree of depth) of defect.In eddy-current test, in order to more accurately detect a flaw, the built-in giant magnetoresistance of double excitation coil is used to be connected into differential form.Basic circuit is made up of agitator, detection coil signal output circuit, amplifier, signal processor, display and power supply.
The invention has the beneficial effects as follows: double excitation coil-conductor defect automatic flaw detection device of the present invention produces ac-excited eddy current magnetism as core with double excitation coil, double giant magneto-resistance sensor detecting element is used to reach the effect of full-automatic differential high sensitivity detection conducting plane defect, the system that is effectively improved is to deep zone defect and the power of test of surface tiny flaw, accuracy of detection is high, efficiency is high, has popularizing value.
Accompanying drawing explanation
The present invention is further described with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is the perspective view of a preferred embodiment of double excitation coil-conductor defect automatic flaw detection device of the present invention；
Fig. 2 is the side view of double excitation coil-conductor defect automatic flaw detection device of the present invention；
Fig. 3 is the close-up schematic view of I part in Fig. 2；
In figure: 1. power buggy, 2. roller, 3. direct current generator, 4. detecting plate, 5. excitation coil, 6. giant magneto-resistance sensor, 7. spring.
Detailed description of the invention
In conjunction with the accompanying drawings, the present invention is further detailed explanation.These accompanying drawings are the schematic diagram of simplification, and the basic structure of the present invention is described the most in a schematic way, and therefore it only shows the composition relevant with the present invention.
As Figure 1-3, a kind of double excitation coil-conductor defect automatic flaw detection device, including power buggy 1, single-chip microcomputer, detecting plate 4, excitation coil 5, giant magneto-resistance sensor 6 and relay, it is internal that described single-chip microcomputer is arranged on power buggy 1, 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 control detecting plate 4 both sides and downwardly turns over, two excitation coils 5 it are fixed with on described detecting plate 4, two excitation coils 5 are symmetricly set on detecting plate 4, it is respectively arranged with giant magneto-resistance sensor 6 in two excitation coils 5, described giant magneto-resistance sensor 6 bottom surface and excitation coil 5 bottom are in same level, giant magneto-resistance sensor 6 electrically connects with single-chip microcomputer.
Being evenly arranged with three rollers 2 in described power buggy 1, three rollers 2 are arranged in triangle, 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 controls power buggy 1 by roller 2 and moves or turn to.
Described detecting plate 4 includes left detecting plate and right detecting plate, it is provided with bearing pin between left detecting plate and right detecting plate, left detecting plate, right detecting plate connect rotating around bearing pin upset, and left detecting plate, right detecting plate are respectively fixed with an excitation coil 5 and giant magneto-resistance sensor 6.
The present invention also provides for the method for detection of a kind of double excitation coil-conductor defect automatic flaw detection device, comprises the steps:
Step one: after normal power-up, direct current generator 3 drives power buggy 1 to travel to region to be measured；
Step 2: relay will be pressed under detecting plate 4 left and right sides, makes two groups of excitation coils 5 and giant magneto-resistance sensor 6 be close to plane to be measured respectively；
Step 3: two excitation coils 5 lead to the high frequency after inversion or medium frequency alternating current, now signals collecting opened by single-chip microcomputer, if region surface to be measured or internal defective, the magnetic field size that in region the most to be measured, eddy current causes can change, owing to the change of magnetic flux makes the output voltage of both sides giant magneto-resistance sensor 6 different, judging the defective existence in region the most to be measured through differential comparator and report to the police, otherwise power buggy 1 normally advances；
Step 4: when power buggy 1 runs to the region end to be measured, owing to giant magneto-resistance sensor 6 does not receives the signal that eddy current causes, direct current generator 3 drives power buggy 1 to turn to, and continues detection, and above step repeats.
Wherein, power supply circuits power supply can use civil power (needing rectification) or battery, wherein road supply Single-chip Controlling acquisition system and a direct current generator, and another road supplies double excitation coil 5 after being reverse into alternating current, produces current vortex for excitation conductor.
nullDuring detection，Turn on the power，Two relays are respectively by left detecting plate、Press under right detecting plate，Left detecting plate、Right detecting plate downwardly turns over around bearing pin，Drive double excitation coil 5、Double giant magneto-resistance sensors are pressed for 6 times and are close to plane to be measured，Double excitation coil 5 leads to the high frequency after inversion or medium frequency alternating current，Direct current generator 3 driving rolls rolls thus drives power buggy 1 to advance，Power buggy 1 moves ahead along region surface to be measured，Now signals collecting opened by single-chip microcomputer，If region surface to be measured or internal defective，The magnetic field size that in region the most to be measured, eddy current causes can change，Owing to the change of magnetic flux makes the output voltage of both sides giant magneto-resistance sensor 6 different，Judge the defective existence in region the most to be measured through differential comparator and report to the police，Otherwise power buggy 1 normally advances，After power buggy 1 runs to the region to be measured end，Direct current generator 3 drives dolly to turn to，Continue detection，Until whole region detection to be measured is complete，The most left detecting plate、Right detecting plate loses the active force of relay，Elasticity due to spring 7，Left detecting plate、Right detecting plate drives double excitation coil 5、Double giant magneto-resistance sensors 6 reset，Leave plane to be measured.
Compared with prior art, double excitation coil-conductor defect automatic flaw detection device of the present invention produces ac-excited eddy current magnetism as core with double excitation coil 5, double giant magneto-resistance sensor 6 detecting element is used to reach the effect of full-automatic differential high sensitivity detection conducting plane defect, the system that is effectively improved is to deep zone defect and the power of test of surface tiny flaw, accuracy of detection is high, efficiency is high, has popularizing value.
With the above-mentioned desirable embodiment according to the present invention for enlightenment, by above-mentioned description, relevant staff can carry out various change and amendment completely in the range of without departing from this invention technological thought.The content that the technical scope of this invention is not limited in description, it is necessary to determine its technical scope according to right.
Claims (2)
1. a double excitation coil-conductor defect automatic flaw detection device, it is characterised in that: include power buggy,
Single-chip microcomputer, detecting plate, excitation coil, giant magneto-resistance sensor and relay, described single-chip microcomputer is arranged on power
Car interior, described detecting plate is arranged on one end of power buggy bottom surface, and spring is passed through at detecting plate two ends respectively
Being connected with power buggy bottom surface elasticity, described relay is connected with detecting plate and controls detecting plate both sides and turns over downwards
Turning, described detecting plate is fixed with two excitation coils, two excitation coils are symmetricly set on detecting plate, and two
Giant magneto-resistance sensor, described giant magneto-resistance sensor bottom surface and excitation coil bottom it is respectively arranged with in excitation coil
Being in same level, giant magneto-resistance sensor electrically connects with single-chip microcomputer；It is evenly arranged with in described power buggy
Some rollers, described roller is connected with direct current generator；Described detecting plate includes left detecting plate and right detecting plate,
Being provided with bearing pin between left detecting plate and right detecting plate, left detecting plate, right detecting plate are rotating around bearing pin upset even
Connect.
2. the method for detection of a double excitation coil-conductor defect automatic flaw detection device, it is characterised in that: described
Method of detection uses double excitation coil-conductor defect automatic flaw detection device as claimed in claim 1, including such as
Lower step:
Step one: after normal power-up, DC motor Driver power buggy travels to region to be measured；
Step 2: relay will be pressed under the detecting plate left and right sides, makes two groups of excitation coils and giant magneto-resistance sensor
It is close to plane to be measured respectively；
Step 3: two excitation coils lead to the high frequency after inversion or medium frequency alternating current, and now signal opened by single-chip microcomputer
Gather, if region surface to be measured or internal defective, the magnetic field size meeting that in region the most to be measured, eddy current causes
Change, owing to the change of magnetic flux makes the output voltage of both sides giant magneto-resistance sensor different, through differential ratio
Judging the defective existence in region the most to be measured compared with device and report to the police, otherwise power buggy normally advances；
Step 4: when power buggy runs to the region end to be measured, owing to giant magneto-resistance sensor does not receives
The signal that eddy current causes, DC motor Driver power buggy turns to, and continues detection, and above step repeats.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410099707.2A CN103822967B (en) | 2014-03-18 | 2014-03-18 | Double excitation coil-conductor defect automatic flaw detection device and method of detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410099707.2A CN103822967B (en) | 2014-03-18 | 2014-03-18 | Double excitation coil-conductor defect automatic flaw detection device and method of detection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103822967A CN103822967A (en) | 2014-05-28 |
| CN103822967B true CN103822967B (en) | 2016-09-14 |
Family
ID=50758131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410099707.2A Active CN103822967B (en) | 2014-03-18 | 2014-03-18 | Double excitation coil-conductor defect automatic flaw detection device and method of detection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103822967B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784839A (en) * | 2016-03-18 | 2016-07-20 | 中国计量学院 | Method for detecting micro-defects on surfaces of metal container |
| CN105866238B (en) * | 2016-05-20 | 2023-06-09 | 云南电网有限责任公司电力科学研究院 | High-temperature superconducting tape detection system |
| CN108344798B (en) * | 2018-04-20 | 2024-01-26 | 北方民族大学 | Double-frequency excitation circular eddy current probe and method for detecting thick-wall deep crack defects |
| CN109870501B (en) * | 2019-03-01 | 2023-01-31 | 深圳市颐高云科技有限公司 | Wheel crack detection device based on eddy current induction |
| CN111157610A (en) * | 2020-01-03 | 2020-05-15 | 国家电网有限公司 | Circuit breaker spring defect detection device based on magnetoacoustic emission technology |
| CN111272864B (en) * | 2020-02-28 | 2023-05-23 | 湖北工业大学 | Pulsed eddy current detection system and method based on radial magnetic field |
| CN112345624A (en) * | 2020-10-27 | 2021-02-09 | 北京信息科技大学 | High-sensitivity metal wear particle detection sensor based on giant magnetoresistance effect |
| CN112986379A (en) * | 2021-03-03 | 2021-06-18 | 中国科学院电工研究所 | Pipeline inner wall defect detection device based on low-frequency electromagnetic field detection |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86203636U (en) * | 1986-05-30 | 1987-04-22 | 洛阳工学院 | Vortex flaw-sensing detector |
| CN2194002Y (en) * | 1994-01-26 | 1995-04-05 | 郑兆翁 | Eddy current detector |
| US20020158626A1 (en) * | 2000-11-08 | 2002-10-31 | Jentek Sensors, Inc. | Deep penetration magnetoquasistatic arrays |
| US6504363B1 (en) * | 2000-03-07 | 2003-01-07 | Teodor Dogaru | Sensor for eddy current testing and method of use thereof |
| CN102661997A (en) * | 2012-05-08 | 2012-09-12 | 三一重工股份有限公司 | Eddy current type sensing device and engineering machinery |
| CN202502072U (en) * | 2012-04-05 | 2012-10-24 | 南京润奇检测仪器有限公司 | Double-channel computer eddy current detector |
| CN203745420U (en) * | 2014-03-18 | 2014-07-30 | 江苏理工学院 | Automatic double-exciting-coil conductor flaw detection device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3843343B2 (en) * | 2003-07-22 | 2006-11-08 | 国立大学法人金沢大学 | Eddy current sensor for nondestructive inspection |
-
2014
- 2014-03-18 CN CN201410099707.2A patent/CN103822967B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86203636U (en) * | 1986-05-30 | 1987-04-22 | 洛阳工学院 | Vortex flaw-sensing detector |
| CN2194002Y (en) * | 1994-01-26 | 1995-04-05 | 郑兆翁 | Eddy current detector |
| US6504363B1 (en) * | 2000-03-07 | 2003-01-07 | Teodor Dogaru | Sensor for eddy current testing and method of use thereof |
| US20020158626A1 (en) * | 2000-11-08 | 2002-10-31 | Jentek Sensors, Inc. | Deep penetration magnetoquasistatic arrays |
| CN202502072U (en) * | 2012-04-05 | 2012-10-24 | 南京润奇检测仪器有限公司 | Double-channel computer eddy current detector |
| CN102661997A (en) * | 2012-05-08 | 2012-09-12 | 三一重工股份有限公司 | Eddy current type sensing device and engineering machinery |
| CN203745420U (en) * | 2014-03-18 | 2014-07-30 | 江苏理工学院 | Automatic double-exciting-coil conductor flaw detection device |
Non-Patent Citations (3)
| Title |
|---|
| Classification of pulsed eddy current GMR data on aircraft structures;Jaejoon Kim et al.;《NDT&E International》;20091025;第43卷(第2期);第141-144页 * |
| 一种新型智能金属探测仪的设计;贺桂芳 等;《仪表技术与传感器》;20060131(第1期);第13-14页 * |
| 巨磁阻传感器在涡流检测中的应用;陈亮 等;《无损检测》;20051231;第27卷(第8期);第399-401页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103822967A (en) | 2014-05-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103822967B (en) | Double excitation coil-conductor defect automatic flaw detection device and method of detection | |
| CN103163216B (en) | A kind of metallic conductor defect recognition based on giant magnetoresistance sensor and method of estimation | |
| CN103499404B (en) | Ferromagnetic component alterante stress measurement mechanism and measuring method thereof | |
| CN103954684B (en) | A kind of method utilizing leakage field rate of change to carry out Non-Destructive Testing | |
| JP5522699B2 (en) | Nondestructive inspection apparatus and nondestructive inspection method using pulse magnetism | |
| CN104297338A (en) | Pulse eddy current detecting system based on rectangular difference probe | |
| CN105353030A (en) | Low-frequency electromagnetism-based defect detecting device | |
| KR101165237B1 (en) | Nondestructive flaw test apparatus by measuring magnetic flux leakage | |
| CN204255904U (en) | Based on the Pulsed Eddy Current Testing System of rectangle difference detector | |
| CN203908994U (en) | Pulse flux leakage flaw detector | |
| CN103728368A (en) | Crack detector used for rail parts | |
| CN202159035U (en) | Defect quantitative nondestructive inspecting equipment for oil casing | |
| Li et al. | Numerical simulation and experiments of magnetic flux leakage inspection in pipeline steel | |
| 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 | |
| Liu et al. | Rail defect inspection using alternating current excitation coils with digital demodulation algorithm | |
| CN203745420U (en) | Automatic double-exciting-coil conductor flaw detection device | |
| CN203350226U (en) | Magnetic flaw detection sensor based on giant magnetoresistance elements | |
| KR101254300B1 (en) | Apparatus for detecting thickness of the conductor using dual core | |
| JP2012078349A (en) | Pulse excitation type inspection device, and pulse excitation type inspection method | |
| CN103529118B (en) | Probe of pipe leakage flux flaw detection system | |
| CN102901771B (en) | A kind of defect quantitative nondestructive inspecting equipment for oil casing | |
| Göktepe | Investigation of and Components of the Magnetic Flux Leakage in Ferromagnetic Laminated Sample | |
| Angani et al. | Dual core differential pulsed eddy current probe to detect the wall thickness variation in an insulated stainless steel pipe | |
| CN202153218U (en) | Quantitative and nondestructive defect detection probe for oil casing pipe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |