CN203324225U - Metal magnetic memory detector - Google Patents
Metal magnetic memory detector Download PDFInfo
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- CN203324225U CN203324225U CN2012204169208U CN201220416920U CN203324225U CN 203324225 U CN203324225 U CN 203324225U CN 2012204169208 U CN2012204169208 U CN 2012204169208U CN 201220416920 U CN201220416920 U CN 201220416920U CN 203324225 U CN203324225 U CN 203324225U
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- magnetic memory
- metal magnetic
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Abstract
The utility model provides a metal magnetic memory detector which comprises a magnetic sensor array. The metal magnetic memory detector is characterized in that the magnetic sensor array comprises a double-shaft fluxgate sensor, wherein the double-shaft fluxgate sensor consists of two single-component fluxgate sensors; the two simple-component fluxgate sensors are mutually and vertically mounted and are sealed inside a non-magnetic double-shaft shell. According to the metal magnetic memory detector provided by the utility model, the two single-component fluxgate sensors which are mutually and vertically mounted are adopted to respectively detect the tangential component and the normal component of a detected metal magnetic field, the detection information redundancy is increased, the detection precision of the magnetic field is up to 10-9T, and fine damage of a detected object and a stress concentration part inside a part can be detected; in addition, the sensors are adopted to detect the movement distance of a trolley, so that the detection positioning precision is up to 1mm, and the damage position or the stress concentration part are precisely positioned.
Description
Technical field
The utility model relates to a kind of metal magnetic memory testing instrument, specifically, relates to a kind of metal magnetic memory testing instrument for metal defect detection.
Background technology
Magnetic memory detector is usually used in the reliability diagnosis of boilers and pressure vessel and pressure pipeline intensity, existing magnetic memory detector adopts Hall magnetic induction sensor array and magnetoresistive element scanning surface of the work usually, the magnetic signal recorded converts voltage signal to, and carry out amplification filtering, A/D conversion process, signal after the A/D conversion is input to controller, controller is processed the signal that receives, and on display the display measurement result.
But, adopt Hall element and magnetoresistive element as the magnetic memory detector of surveying Magnetic Sensor, its measurement range is generally 10 ~ 10
-7T, measuring accuracy is 10
-7T, can't effectively detect for measured targets such as low-intensity magnetic field, terrestrial magnetic field, is difficult to effectively to surveying trickle damage and the component inside stress concentration portion position of testee.
The utility model content
The technical problems to be solved in the utility model is, a kind of metal magnetic memory testing instrument is provided, and it can be effectively to surveying trickle damage and the component inside stress concentration portion position of testee.
The utility model is that the technical scheme that its technical matters of solution adopts is: a kind of metal magnetic memory testing instrument is provided, comprise array of magnetic sensors, wherein, described array of magnetic sensors comprises the twin shaft fluxgate sensor, this twin shaft fluxgate sensor is comprised of two simple component fluxgate sensors, described two orthogonal installations of simple component fluxgate sensor, and be encapsulated in without in magnetic twin shaft shell.
Above-mentioned metal magnetic memory testing instrument, wherein, the structure of described two simple component fluxgate sensors is identical.
Above-mentioned metal magnetic memory testing instrument, wherein, described array of magnetic sensors is fixed on a side of dolly by erecting frame.
Above-mentioned metal magnetic memory testing instrument, wherein, the making material of described dolly is non-magnetic material.
Above-mentioned metal magnetic memory testing instrument, wherein, be provided with gear in described dolly, and this gear is connected by transmission belt with wheel disc, and on described gear, sensor is housed.
Above-mentioned metal magnetic memory testing instrument, wherein, described sensor is the infrared light dependent sensor.
Compared with prior art, the utlity model has following beneficial effect: the metal magnetic memory testing instrument that the utility model provides, by adopting two simple component fluxgate sensors of orthogonal installation, detect respectively tangential component and the normal component in tested metal magnetic field, increased detection information redundancy amount, the measuring accuracy in magnetic field reaches 10
-9T, can detect trickle damage and the component inside stress concentration portion position of testee.In addition, the utility model detects dolly displacement by sensor is set, and the detection and location precision reaches 1 millimeter, precision location damage position or stress concentration portion position.
The accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is the structural representation of a kind of metal magnetic memory testing instrument of the utility model;
Fig. 2 is the structural representation of twin shaft fluxgate sensor in Fig. 1;
Fig. 3 is the inner structure schematic diagram of dolly in Fig. 1.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with embodiment and accompanying drawing, the utility model is further described:
As shown in Figure 1, a kind of metal magnetic memory testing instrument is provided, comprises array of magnetic sensors 4, wherein, described array of magnetic sensors 4 comprises twin shaft fluxgate sensor 5, and described array of magnetic sensors 4 is fixed on a side of the dolly 1 of being made by non-magnetic material by erecting frame 3.As shown in Figure 2, this twin shaft fluxgate sensor 5 is comprised of two simple component fluxgate sensors, i.e. the first simple component fluxgate sensor 52 and the second simple component fluxgate sensor 53, described two simple component fluxgate sensors 52 and 53 orthogonal installations, and be encapsulated in without in magnetic twin shaft shell 51, and the structure of described two simple component fluxgate sensors 52 and 53 is identical.From the metal magnetic memory theory, at component stress, to concentrate or the trickle damage field of testee, the horizontal component that the magnetic memory effect shows as the stray field formed in component surface has maximal value, and vertical component is reindexing have the zero passage point value.Therefore, the utility model adopts two mutually perpendicular simple component fluxgate sensors 52 and 53, detects respectively normal component and the horizontal component of testee stray field, has increased detection information redundancy amount, and the measuring accuracy in magnetic field reaches 10
-9T, can detect trickle damage and the component inside stress concentration portion position of testee.
As shown in Figure 3, be provided with gear 6 in described dolly 1, gear 6 is distributed with the gear teeth, on gear 6, between the two adjacent gear teeth, be the tooth grain, gear 6 is connected by transmission belt 8 with wheel disc 2, when wheel disc 2 rotates, driven gear 6 is rotated, and sensor 7 is housed on described gear 6, for detection of dolly 1 displacement.Preferably, this sensor 7 is the infrared light dependent sensor, and when wheel disc 2 driven gears 6 rotate, when the tooth grain is blocked sensor 7 at every turn, sensor 7 all sends a count signal.So, the gear teeth number n distributed on the number N of the count signal sent by sensor 7, gear 6
0Reach wheel disc girth C and just can extrapolate dolly 1 displacement S, i.e. dolly 1 actual motion apart from S is:
Therefore, in the utility model, the detection and location precision of dolly 1 displacement reaches 1 millimeter, can precision location damage position or component inside stress concentration portion position.
In sum, the metal magnetic memory testing instrument that the utility model provides, by two the simple component fluxgate sensors 52 and 53 that adopt orthogonal installation, detect respectively tangential component and the normal component in tested metal magnetic field, increased detection information redundancy amount, the measuring accuracy in magnetic field reaches 10
-9T, can detect the trickle damage of testee.In addition, the utility model detects dolly 1 displacement by sensor 7 is set, and the detection and location precision reaches 1 millimeter, precision location damage position or stress concentration portion position.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (6)
1. a metal magnetic memory testing instrument, comprise array of magnetic sensors, it is characterized in that: described array of magnetic sensors comprises the twin shaft fluxgate sensor, this twin shaft fluxgate sensor is comprised of two simple component fluxgate sensors, described two orthogonal installations of simple component fluxgate sensor, and be encapsulated in without in magnetic twin shaft shell.
2. metal magnetic memory testing instrument according to claim 1, it is characterized in that: the structure of described two simple component fluxgate sensors is identical.
3. metal magnetic memory testing instrument according to claim 1 and 2, it is characterized in that: described array of magnetic sensors is fixed on a side of dolly by erecting frame.
4. metal magnetic memory testing instrument according to claim 3, it is characterized in that: the making material of described dolly is non-magnetic material.
5. metal magnetic memory testing instrument according to claim 4, it is characterized in that: be provided with gear in described dolly, this gear is connected by transmission belt with wheel disc, and on described gear, sensor is housed.
6. metal magnetic memory testing instrument according to claim 5, it is characterized in that: described sensor is the infrared light dependent sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204169208U CN203324225U (en) | 2012-08-21 | 2012-08-21 | Metal magnetic memory detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204169208U CN203324225U (en) | 2012-08-21 | 2012-08-21 | Metal magnetic memory detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203324225U true CN203324225U (en) | 2013-12-04 |
Family
ID=49663564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012204169208U Expired - Fee Related CN203324225U (en) | 2012-08-21 | 2012-08-21 | Metal magnetic memory detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203324225U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109270159A (en) * | 2018-10-31 | 2019-01-25 | 山东特检科技有限公司 | A kind of multichannel ferromagnetic material non-destructive testing sensor and method based on magnetoelectricity complex effect and Metal magnetic memory |
| CN110702778A (en) * | 2019-09-20 | 2020-01-17 | 沈阳工业大学 | Oil-gas pipeline surface crack defect safety assessment method based on weak magnetic method |
| WO2020073407A1 (en) * | 2018-10-09 | 2020-04-16 | 河海大学 | Gate detection robot based on giant magnetoresistance element and detection method |
| CN114544043A (en) * | 2022-01-29 | 2022-05-27 | 中国石油大学(北京) | Multi-steel stress detection device and method |
-
2012
- 2012-08-21 CN CN2012204169208U patent/CN203324225U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020073407A1 (en) * | 2018-10-09 | 2020-04-16 | 河海大学 | Gate detection robot based on giant magnetoresistance element and detection method |
| CN109270159A (en) * | 2018-10-31 | 2019-01-25 | 山东特检科技有限公司 | A kind of multichannel ferromagnetic material non-destructive testing sensor and method based on magnetoelectricity complex effect and Metal magnetic memory |
| CN110702778A (en) * | 2019-09-20 | 2020-01-17 | 沈阳工业大学 | Oil-gas pipeline surface crack defect safety assessment method based on weak magnetic method |
| CN114544043A (en) * | 2022-01-29 | 2022-05-27 | 中国石油大学(北京) | Multi-steel stress detection device and method |
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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: 20131204 Termination date: 20150821 |
|
| EXPY | Termination of patent right or utility model |