CN201527412U - Low-frequency pulse eddy current probe - Google Patents
Low-frequency pulse eddy current probe Download PDFInfo
- Publication number
- CN201527412U CN201527412U CN2009201638866U CN200920163886U CN201527412U CN 201527412 U CN201527412 U CN 201527412U CN 2009201638866 U CN2009201638866 U CN 2009201638866U CN 200920163886 U CN200920163886 U CN 200920163886U CN 201527412 U CN201527412 U CN 201527412U
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- hall element
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- eddy current
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- rear end
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Abstract
The utility model relates to a low-frequency pulse eddy current probe comprising a probe contact end surface, an exciting coil, a probe shell, a wiring end of the exciting coil, an opening place at a rear end cover of the probe shell, a wiring end of a Hall element, and a Hall element, wherein the probe shell is a round tube with the rear end cover which is provided with the opening place; the wiring ends of the exciting coil and the Hall element penetrate out from the rear end cover of the round tube; the probe contact end surface is connected with the probe shell; the exciting coil and the Hall element are fixed on the probe contact end surface; and the Hall element is arranged at a hollow position at the middle of the exciting coil. The low-frequency pulse eddy current detecting system of the probe can be applied to on-line detection of various industries and various products, and especially can be applied to the flaw inspection, mechanical part fatigue crack detection and the like in a multi-layer metal structure.
Description
Affiliated technical field
The utility model relates to a kind of low-frequency pulse eddy current probe, is used in particular for the testing of defective under the various surface of the works.
Background technology
EDDY CURRENT is used very extensive in various industries as one of five big conventional lossless detection methods.Recently, along with people to the understanding in depth and the development of computer technology, technology of instrument and meter and Digital Signal Processing of eddy detection technology, the application of nondestructive detecting technology of vortex has obtained very big breakthrough.The low-frequency pulse eddy current is the new detection technique that developed recently gets up, and is mainly used in surface, subsurface defect detection, is a kind of new application of EDDY CURRENT.Traditional eddy detection technology is because the influence of kelvin effect is difficult to effectively detect the defective in the sandwich construction, and the low-frequency pulse eddy current then can well solve the problem in the part sandwich construction.The low-frequency pulse pumping signal is made up of one group of sinusoidal signal, can get by spectrum analysis and eddy-current technique analysis, also has a plurality of sinusoidal frequency compositions in the response signal.In theory, by the analyzing responding signal, just can obtain the response of defective under different frequency, thereby improve detection efficiency greatly.The data analysis of low-frequency pulse eddy current mainly is based on the feature extraction of detection signal: as time of the peaked appearance of the maximal value of the tail feature of detection signal, detection signal, detection signal etc.Existing low frequency eddy current probe comes detection signal with magnetic test coil, though low price, it is bad low frequency signal to be detected effect, and volume ratio is bigger.The utility model probe adopts Hall element to come the MISE A LAMASSE METHOD signal, and volume is little, and measures accurately, for the data analysis of eddy current on-line detecting system provides support.
The utility model content
The purpose of this utility model is to improve above-mentioned deficiency of the prior art and a kind of novel low-frequency impulse eddy current probe is provided.
The purpose of this utility model reaches by following measure:
The low-frequency pulse eddy current probe comprises a probe contact end face, drive coil, probing shell, the terminal stud of drive coil, the opening part of probing shell rear end cap, the terminal stud of Hall element, Hall element; Described probing shell is the pipe of a band rear end cap, and an opening part is stamped in the rear end of described pipe, and the terminal stud of described drive coil and the terminal stud of described Hall element pass from the rear end cap opening part of described pipe; Described probe contact end face is connected with described probing shell, and described drive coil is fixed on described probe with described Hall element and contacts on the end face; Described drive coil is an air core coil, and described Hall element is placed on described drive coil intermediate hollow place.
The method that Hall element is measured magnetic field is very simple, as long as add stable DC voltage to Hall element, Hall element just can provide the analog or digital signal relevant with magnetic field intensity.The data of computing machine by the analysing low frequency impulse eddy current are extracted the feature of detection signal: as time of the peaked appearance of the maximal value of the tail feature of detection signal, detection signal, detection signal etc., can obtain workpiece, defect information.Now, the low-frequency pulse eddy-current technique can be applied to defects detection, the flaw detection of structural member fatigue crack in the online detection, particularly sandwich construction of multiple industry, multiple product etc.
Advantage of the present utility model is:
The utility model can be surveyed the subsurface defective of metal works; Because the employing Hall element, low frequency measurement is effective, and whole probe size is little, is easy to carry.
Description of drawings
Fig. 1: the cross-sectional view of the utility model low-frequency pulse eddy current probe.
Embodiment
Be illustrated in figure 1 as the structural representation of the utility model low-frequency pulse eddy current probe.Novel eddy current probe comprises a probe contact end face 1, drive coil 2, probing shell 3, the terminal stud 4 of drive coil, the opening part 5 of probing shell rear end cap, the terminal stud 6 of Hall element, Hall element 7.Described probing shell 3 is pipes of a band rear end cap, and an opening part 5 is stamped in the rear end of described pipe, and the terminal stud 4 of described drive coil and the terminal stud 6 of described Hall element pass from the rear end cap opening part 5 of described pipe; Described probe contact end face 1 is connected with described probing shell 3, and described drive coil 2 is fixed on described probe with described Hall element 7 and contacts on the end face 1; Described drive coil 2 is air core coils; Described Hall element 7 is placed on described drive coil 2 intermediate hollow places.
When using the eddy current probe detecting defects, probe contact end face 1 is placed on the detected element, drive coil transponder pulse signal, and Hall element detects surrounding magnetic field information, produce detectable signal, be input to behind the circuit such as the amplification of detectable signal process, filtering and carry out data processing in the computing machine; Just can obtain surface of the work and subsurface defect information then.
Adopt the low-frequency pulse eddy current monitoring system of the utility model probe, can be applied to defects detection, the flaw detection of hardware fatigue crack etc. in the online detection of multiple industry, multiple product, particularly metallic multilayer structure.
Claims (1)
1. novel eddy current probe is characterized in that: comprise a probe contact end face (1), drive coil (2), probing shell (3), the terminal stud of drive coil (4), the opening part of probing shell rear end cap (5), the terminal stud of Hall element (6), Hall element (7); Described probing shell (3) is the pipe of a band rear end cap, an opening part (5) is stamped in the rear end of described pipe, and the terminal stud (6) of terminal stud of described drive coil (4) and described Hall element passes from the rear end cap opening part (5) of described pipe; Described probe contact end face (1) is connected with described probing shell (3), and described drive coil (2) is fixed on described probe with described Hall element (7) and contacts on the end face (1); Described drive coil (2) is an air core coil; Described Hall element (7) is placed on described drive coil (2) intermediate hollow place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201638866U CN201527412U (en) | 2009-07-06 | 2009-07-06 | Low-frequency pulse eddy current probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201638866U CN201527412U (en) | 2009-07-06 | 2009-07-06 | Low-frequency pulse eddy current probe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201527412U true CN201527412U (en) | 2010-07-14 |
Family
ID=42518697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201638866U Expired - Fee Related CN201527412U (en) | 2009-07-06 | 2009-07-06 | Low-frequency pulse eddy current probe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201527412U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107085014A (en) * | 2016-02-16 | 2017-08-22 | 西安康际石油科技有限公司 | A kind of medicament device for fast detecting |
| CN108692193A (en) * | 2018-05-31 | 2018-10-23 | 中国石油化工股份有限公司 | A kind of Pulsed Eddy Current Testing System and method of small-caliber pipeline defect |
-
2009
- 2009-07-06 CN CN2009201638866U patent/CN201527412U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107085014A (en) * | 2016-02-16 | 2017-08-22 | 西安康际石油科技有限公司 | A kind of medicament device for fast detecting |
| CN108692193A (en) * | 2018-05-31 | 2018-10-23 | 中国石油化工股份有限公司 | A kind of Pulsed Eddy Current Testing System and method of small-caliber pipeline defect |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100714 Termination date: 20110706 |