CN203908994U - Pulse flux leakage flaw detector - Google Patents
Pulse flux leakage flaw detector Download PDFInfo
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- CN203908994U CN203908994U CN201420275349.1U CN201420275349U CN203908994U CN 203908994 U CN203908994 U CN 203908994U CN 201420275349 U CN201420275349 U CN 201420275349U CN 203908994 U CN203908994 U CN 203908994U
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Abstract
The utility model relates to a detection device, in particular to a pulse flux leakage flaw detector. The pulse flux leakage detector comprises a switching power supply, a magnetizer probe, a pulse excitation signal source, a data acquisition module and data acquisition analysis software, wherein the pulse excitation signal source comprises a signal conditioning circuit; one end of the pulse excitation signal source is connected with the switching power supply, and the other end of the pulse excitation signal source is respectively connected with the data acquisition module and the magnetizer probe; the data acquisition module is downwards connected with the data acquisition analysis software. According to the pulse flux leakage flaw detector, the steps of grinding of parts to be detected, preparation of a magnetic suspension, recording of defects and the like are needless, the operation process is simple, the detection cost is greatly lowered, the detection efficiency is greatly improved, and the improvement on the detection quality and the detection efficiency of the weld surface and the near surface flaw of special equipment is facilitated.
Description
Technical field
The utility model relates to a kind of sniffer, is specifically related to a kind of pulse leakage defectoscope.
Background technology
The technology such as the main magnetic powder inspection of the detection means of special equipment surface imperfection at present,, infiltration detection, EDDY CURRENT.Wherein, penetration detection is the inspection of suitable surface opening type defect only, surface of the work is required clean and dry, and the examined personnel's of judgement of testing result execute-in-place and experience impact large, and cannot detect the defect on nearly surface; Eddy detection technology coil does not need directly to contact with measured object, can carry out high speed detection, easily be automated, but checkout equipment is larger, be generally used for the appearance check of tubing, and detection sensitivity is lower, inapplicable to baroque workpiece yet; It is that current special equipment detects sector application surface nondestructive inspection technique the most widely that magnetic detects, detection sensitivity is high, can find the little defect of micron order width, but it is strict to measured workpiece surface requirements, need eliminating equipment surface coating, detect with magnetic flaw detection ink and need the on-the-spot preparation of operating personnel, testing result is subject to its concentration affects, meanwhile, in environment temperature, during lower than zero degree, can cause testing to carry out because magnetic flaw detection ink freezes.
Summary of the invention
The technical problems to be solved in the utility model is how to overcome the deficiency that prior art exists, a kind of pulse leakage defectoscope is provided, can effectively overcome the factors such as surface coating, environment temperature to the impact detecting, realize the high efficient detection that do not stop production of special equipment, significantly improve checkability and the safe reliability of special equipment.
Technical solution of the present utility model is: a kind of pulse leakage defectoscope, is characterized in that: comprise Switching Power Supply, magnetizing apparatus probe, pulse excitation signal source, data acquisition module and data collection and analysis software.Described pulse excitation signal source is containing signal conditioning circuit, and one end, described pulse excitation signal source is connected with Switching Power Supply, and the other end is connected respectively at data acquisition module, magnetizing apparatus probe, connects data collection and analysis software under described data acquisition module.
Described magnetizing apparatus probe is by U-shaped magnetic core framework, drive coil and Hall element, and described drive coil is wound on magnetic core coil, and described Hall element is arranged in the middle of U-shaped skeleton pin.
Described Switching Power Supply adopts NES-200-12 type stabilized voltage supply.
Described U-shaped magnetic core framework is ferrite.
Described U-shaped magnetic core framework height is the wide 59mm of being of 31.7mm, and core diameter is 15.8mm.
The described drive coil number of turn is 200 circles, and drive coil wire diameter is 0.75mm.
Described pulse excitation source part comprises FPGA circuit, isolated drive circuit, MOSFET chopper circuit, low-voltage high-current power source, keyboard and display screen.
Described MOSFET chopper circuit model is IRF1010.
Described display screen is LCD2864 Liquid Crystal Module, has the resolution of 128x64 point, and inside is provided with ST792O display driver chip.
Described keyboard control circuit is mainly pulse signal source and controls,
Described acquisition module comprises data collecting card, and the sample frequency of described capture card is 5 to 10 times of digital signal highest frequency.
Described tested magnetic part is any one in magnetic part, silicon rubber, steel plate.
The utility model principle is that pulse excitation signal source produces pulse signal, in the drive coil of input probe, to tested magnetic part magnetization.Conventionally in tested magnetic part, use rectangle groove simulating crack defect, probe is moved at tested magnetic part surface level, and mobile direction and rectangle groove defect are axially vertical angle, at the uniform velocity by the left of groove without injury, through groove, to its right side, without injury, move.When probe is above through rectangle groove defect, at this moment be placed on the magnetic leakage signal that the Hall element of magnetizing apparatus probe below picks up rectangle groove fault location, the signal that picks up is through signal conditioning circuit, by data collecting module collected and be sent in data collection and analysis software.
Originally the advantage that is utility model is to overcome the factors such as surface coating, environment temperature to the impact detecting, and realizes the high efficient detection that do not stop production of special equipment, significantly improves checkability and the safe reliability of special equipment; Avoid the steps such as detection part polishing, configuration magnetic flaw detection ink, recording defect, operating process is simple, and testing cost reduces greatly, and detection efficiency improves greatly, contributes to improve detection quality and the detection efficiency of special equipment face of weld and near surface flaw.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Fig. 1 is the utility model molded tissue block schematic diagram;
Fig. 2 is the utility model magnetic sensor arrangement schematic diagram;
Fig. 3 is the utility model pulse excitation source signal source structure figure;
Embodiment
A pulse leakage defectoscope, comprises Switching Power Supply, magnetizing apparatus probe, pulse excitation signal source, data acquisition module and data collection and analysis software.Described pulse excitation signal source is containing signal conditioning circuit, and one end, described pulse excitation signal source is connected with Switching Power Supply, and the other end is connected respectively at data acquisition module, magnetizing apparatus probe, connects data collection and analysis software under described data acquisition module.Described magnetizing apparatus probe is by U-shaped magnetic core framework, drive coil and Hall element, and described drive coil is wound on magnetic core coil, and described Hall element is arranged in the middle of U-shaped skeleton pin.Described pulse excitation source part comprises FPGA circuit, isolated drive circuit, MOSFET chopper circuit, low-voltage high-current power source, keyboard and display screen circuit.Switching Power Supply described in the utility model adopts NES-200-12 type stabilized voltage supply, guarantees voltage stabilization.Described U-shaped magnetic core framework adopts ferrite, saves cost.Described U-shaped magnetic core framework height is the wide 59mm of being of 31.7mm, and core diameter is 15.8mm.For coordinating U-shaped magnetic core framework, the described drive coil number of turn is 200 circles, and drive coil wire diameter is 0.75mm.Described MOSFET chopper circuit model is IRF1010.Described display screen is LCD2864 Liquid Crystal Module, has the resolution of 128x64 point, and inside is provided with ST792O display driver chip, guarantees that clear display is visible.
When pulse is sent to drive coil in pulse excitation signal source, drive coil produces magnetic field and to magnetizing, while reaching certain magnetization, when tested magnetic part defectiveness exists, at surface imperfection place, can produce stray field, can be gathered and send again data collection and analysis software to by data acquisition card.
The production process of described pulse signal is: by key in data, be assigned to square-wave signal generation module, FPGA exports square-wave signal, simultaneously by display module, the amplitude frequency of square-wave signal, dutycycle etc. is shown.The square-wave signal producing, through light lotus root buffer circuit, is input to driving circuit, is connected on MOSFET pipe, controls MOSFET pipe break-make, produces pulse excitation signal.
Claims (10)
1. a pulse leakage defectoscope, it is characterized in that: comprise Switching Power Supply, magnetizing apparatus probe, pulse excitation signal source, data acquisition module and data collection and analysis software, described pulse excitation signal source is containing signal conditioning circuit, one end, described pulse excitation signal source is connected with Switching Power Supply, the other end is respectively at data acquisition module, magnetizing apparatus probe is connected, under described data acquisition module, connect data collection and analysis software, described magnetizing apparatus probe is by U-shaped magnetic core framework, drive coil and Hall element form, described drive coil is wound on magnetic core coil, described Hall element is arranged in the middle of U-shaped magnetic core framework pin.
2. a kind of pulse leakage defectoscope according to claim 1, is characterized in that: described Switching Power Supply adopts NES-200-12 type stabilized voltage supply.
3. a kind of pulse leakage defectoscope according to claim 1, is characterized in that: described U-shaped magnetic core framework is ferrite.
4. a kind of pulse leakage defectoscope according to claim 1, is characterized in that: described U-shaped magnetic core framework is high is 59mm for 31.7mm is wide, and core diameter is 15.8mm.
5. a kind of pulse leakage defectoscope according to claim 1, is characterized in that: the described drive coil number of turn is 200 circles, and drive coil diameter is 0.75mm.
6. a kind of pulse leakage defectoscope according to claim 1, is characterized in that: described pulse excitation source part comprises FPGA circuit, isolated drive circuit, MOSFET chopper circuit, low-voltage high-current power source, keyboard and display screen.
7. a kind of pulse leakage defectoscope according to claim 6, is characterized in that: described MOSFET chopper circuit model is IRF1010.
8. a kind of pulse leakage defectoscope according to claim 6, is characterized in that: described display screen is LCD2864 Liquid Crystal Module, has the resolution of 128x64 point, and inside is provided with ST792O display driver chip.
9. a kind of pulse leakage defectoscope according to claim 1, is characterized in that: described acquisition module comprises data collecting card, and described capture card sample frequency is 5 to 10 times of digital signal highest frequency.
10. a kind of pulse leakage defectoscope according to claim 1, is characterized in that: also comprise tested magnetic part, described tested magnetic part is any one in magnetic part, silicon rubber, steel plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420275349.1U CN203908994U (en) | 2014-05-27 | 2014-05-27 | Pulse flux leakage flaw detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420275349.1U CN203908994U (en) | 2014-05-27 | 2014-05-27 | Pulse flux leakage flaw detector |
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| Publication Number | Publication Date |
|---|---|
| CN203908994U true CN203908994U (en) | 2014-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420275349.1U Expired - Fee Related CN203908994U (en) | 2014-05-27 | 2014-05-27 | Pulse flux leakage flaw detector |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105866239A (en) * | 2016-04-25 | 2016-08-17 | 江南大学 | Detection method for U-shaped pulse fusing sensor based on ferromagnetic test piece |
| CN106841380A (en) * | 2017-01-25 | 2017-06-13 | 哈尔滨理工大学 | For miniature synchronization damage method and device are visited every the top layer of magneto |
| CN108828058A (en) * | 2018-06-06 | 2018-11-16 | 南京航空航天大学 | A method of based on pulse leakage detection zone steel splitting plate upper and lower surfaces defect |
| CN110018229A (en) * | 2019-05-29 | 2019-07-16 | 中国计量大学 | A kind of multichannel low frequency magnetic leakage signal wireless acquisition system based on STM32 |
| CN110672001A (en) * | 2019-10-24 | 2020-01-10 | 中航通飞华南飞机工业有限公司 | Method and device for measuring thickness of non-ferromagnetic material on surface of ferromagnetic material |
| WO2024040898A1 (en) * | 2022-08-22 | 2024-02-29 | 华能(福建漳州)能源有限责任公司 | Labview-based teaching aid device for magnetic flux leakage detection |
-
2014
- 2014-05-27 CN CN201420275349.1U patent/CN203908994U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105866239A (en) * | 2016-04-25 | 2016-08-17 | 江南大学 | Detection method for U-shaped pulse fusing sensor based on ferromagnetic test piece |
| CN106841380A (en) * | 2017-01-25 | 2017-06-13 | 哈尔滨理工大学 | For miniature synchronization damage method and device are visited every the top layer of magneto |
| CN106841380B (en) * | 2017-01-25 | 2020-04-28 | 哈尔滨理工大学 | Surface layer damage detection method and device for micro synchronous magnetic isolation motor |
| CN108828058A (en) * | 2018-06-06 | 2018-11-16 | 南京航空航天大学 | A method of based on pulse leakage detection zone steel splitting plate upper and lower surfaces defect |
| CN108828058B (en) * | 2018-06-06 | 2020-04-21 | 南京航空航天大学 | Method for distinguishing defects of upper surface and lower surface of steel plate based on pulse magnetic flux leakage detection |
| CN110018229A (en) * | 2019-05-29 | 2019-07-16 | 中国计量大学 | A kind of multichannel low frequency magnetic leakage signal wireless acquisition system based on STM32 |
| CN110672001A (en) * | 2019-10-24 | 2020-01-10 | 中航通飞华南飞机工业有限公司 | Method and device for measuring thickness of non-ferromagnetic material on surface of ferromagnetic material |
| WO2024040898A1 (en) * | 2022-08-22 | 2024-02-29 | 华能(福建漳州)能源有限责任公司 | Labview-based teaching aid device for magnetic flux leakage detection |
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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 |
Granted publication date: 20141029 Termination date: 20150527 |
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| EXPY | Termination of patent right or utility model |