CN105334481A - Method for monitoring effectiveness of magnetometer - Google Patents
Method for monitoring effectiveness of magnetometer Download PDFInfo
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- CN105334481A CN105334481A CN201510552471.8A CN201510552471A CN105334481A CN 105334481 A CN105334481 A CN 105334481A CN 201510552471 A CN201510552471 A CN 201510552471A CN 105334481 A CN105334481 A CN 105334481A
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- magnetometer
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- standard magnet
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Abstract
The invention belongs to the technical field of the NDT technology (non-destructive testing technology) of parts, and relates to a method for monitoring the effectiveness of a magnetometer. The method comprises the steps: firstly preparing a magnet, carrying out the periodic verification and calibration of the magnet, and enabling the magnet to be a standard magnet; secondly monitoring the magnetometer through employing the standard magnet. If the standard magnet is used for monitoring the magnetometer and a measurement value of the magnetometer is within a range, it indicates that the magnetometer is effective, or else, the magnetometer cannot reach a measurement precision, and has to be forbidden. The method can detect the magnetometer conveniently at any time and place through employing the standard magnet, thereby timely controlling the effectiveness of the magnetometer, and guaranteeing flaw detection quality.
Description
Technical field
The invention belongs to part technical field of nondestructive testing, relate to a kind of method monitoring magnetometer validity.
Prior art
Magnetic particle inspection is a kind of common method that part defect detects, all qualified part through magnetic particle inspection must be demagnetized, the remnant field intensity with magnetometer survey part is needed after demagnetization, remnant field intensity is not more than 240A/m (3 oersted), and the remnant field intensity in Site Detection process after demagnetization is zero sometimes.But the magnetometer measuring demagnetization effectiveness is verify once every half a year, there is no other surveillance and control measure, the shortcoming of such operation: in the interval of once or twice inspection, if magnetometer lost efficacy or precision does not reach, tester cannot Timeliness coverage, two, cannot determining when instrument was from losing efficacy, quality of demagnetizing cannot be ensured.
The content of invention
The object of the invention is: provide one to facilitate in time and find whether magnetometer lost efficacy, ensure the magnetometer validity method for supervising of the demagnetization quality of seized part.
Technical matters to be solved by this invention is: provide a kind of method monitoring magnetometer validity, can ensure that seized part well demagnetizes quality the moment.
Technical scheme of the present invention is: a kind of magnetometer validity method for supervising, prepare a magnet, and to magnet carry out the cycle verification demarcation become standard magnet, then standard magnet is adopted to monitor magnetometer, if when adopting standard magnet to monitor magnetometer, magnetometer survey value reach, then illustrate that this magnetometer is effective, otherwise this magnetometer does not reach the precision of measurement, must stop using.
The magnetic field intensity of described standard magnet is 2.4 ± 5% oersteds.
When detecting magnetometer with standard magnet, the spacing of standard magnet and magnetometer is at 60 ± 5%mm, and the indicator instruction of magnetometer at least can reach 2.3 oersteds, shows that this magnetometer is effective.
Effect of the present invention is: the present invention adopts standard magnet can detect easily at any time magnetometer, thus can control the validity of magnetometer in time, ensures flaw detection quality.
Embodiment
Below the specific embodiment of the present invention is described further.
Magnetometer validity method for supervising of the present invention, comprises the following steps:
1.1 prepare a permanent magnet
Prepare the magnet that one piece has permanent magnetism.
1.2 pairs of magnet verify
Have the magnet of permanent magnetism to deliver to metrological service to verify, be defined as standard magnet, determine the value of magnetic field intensity above-mentioned.
1.3 monitor magnetometer with standard magnet
After every day or each part demagnetize, first with standard magnet, magnetometer is monitored, ensure that magnetometer is effective, and then the part after demagnetization is measured.If when adopting standard magnet to monitor magnetometer, magnetometer survey value does not reach scope, then illustrate that this magnetometer lost efficacy, do not reach the precision of measurement, must stop using.
Embodiment 1
Use the remnant field intensity after the demagnetization of magnetometer survey pipe beam, concrete steps are as follows:
1.1 prepare a permanent magnet
Prepare the magnet that one piece has permanent magnetism.
1.2 pairs of magnet verify
Have the magnet of permanent magnetism to deliver to metrological service to verify, be defined as standard magnet above-mentioned, its magnetic field intensity is 2.4+5% oersted (i.e. 2.28-2.52 oersteds).
1.3 monitor magnetometer with standard magnet
Remnant field intensity after the demagnetization of measuring tube beam, first monitor magnetometer with standard magnet, magnetometer indicator is designated as 2.3 oersteds, in 2.28-2.52 intervals, illustrates that this magnetometer is effective.Then use hand rest circular magnetometer, be attached on the Guan Liang after demagnetization, ask magnetometer to turn around along periphery of part size, determine that the remnant field intensity in each direction is no more than 0.05 oersted, then illustrate that this pipe beam demagnetization effectiveness reaches requirement.
Claims (3)
1. a magnetometer validity method for supervising, it is characterized by, prepare a magnet, and to magnet carry out the cycle verification demarcation become standard magnet, then adopt standard magnet magnetometer is monitored, if when adopting standard magnet to monitor magnetometer, magnetometer survey value reach, then illustrate that this magnetometer is effective, otherwise, this magnetometer does not reach the precision of measurement, must stop using.
2. magnetometer validity method for supervising according to claim 1, is characterized by, and the magnetic field intensity of described standard magnet is 2.4 ± 5% oersteds.
3. magnetometer validity method for supervising according to claim 2, it is characterized by, when detecting magnetometer with standard magnet, the spacing of standard magnet and magnetometer is at 60 ± 5%mm, the indicator instruction of magnetometer at least can reach 2.3 oersteds, shows that this magnetometer is effective.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510552471.8A CN105334481A (en) | 2015-09-02 | 2015-09-02 | Method for monitoring effectiveness of magnetometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510552471.8A CN105334481A (en) | 2015-09-02 | 2015-09-02 | Method for monitoring effectiveness of magnetometer |
Publications (1)
| Publication Number | Publication Date |
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| CN105334481A true CN105334481A (en) | 2016-02-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201510552471.8A Pending CN105334481A (en) | 2015-09-02 | 2015-09-02 | Method for monitoring effectiveness of magnetometer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109738844A (en) * | 2019-03-07 | 2019-05-10 | 江苏苏威尔科技有限公司 | A kind of magnetic induction intensity transducer calibration and test fixture |
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| CN103033786A (en) * | 2011-10-08 | 2013-04-10 | 中国科学院空间科学与应用研究中心 | Quadrature calibration method and device of triaxial vector magnetometer |
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Patent Citations (7)
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| US4340861A (en) * | 1980-03-03 | 1982-07-20 | Raytheon Company | Method of measuring magnetic field characteristics of magnetic materials |
| SU974309A1 (en) * | 1981-01-21 | 1982-11-15 | Предприятие П/Я А-1216 | Vibration magnetometer |
| US6130534A (en) * | 1998-03-10 | 2000-10-10 | Chung Shan Institute Of Science And Technology | Method of calibrating a three-axis magnetometer |
| CN101251584A (en) * | 2008-04-09 | 2008-08-27 | 武汉大学 | Three-axial magnetometer correcting method and three-axial magnetic gradient correcting method |
| CN103033786A (en) * | 2011-10-08 | 2013-04-10 | 中国科学院空间科学与应用研究中心 | Quadrature calibration method and device of triaxial vector magnetometer |
| CN104777515A (en) * | 2014-01-13 | 2015-07-15 | 塔塔咨询服务有限公司 | Detection system |
| CN104237810A (en) * | 2014-10-16 | 2014-12-24 | 北京卫星环境工程研究所 | Spacecraft magnetic field calibration method |
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| 周斌: "磁通门磁强计性能测试的环境和方法", 《中国空间科学学会空间探测专业委员会第二十一届学术会议》 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109738844A (en) * | 2019-03-07 | 2019-05-10 | 江苏苏威尔科技有限公司 | A kind of magnetic induction intensity transducer calibration and test fixture |
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Application publication date: 20160217 |