CN102798832B - Magnetic sensor test method and system - Google Patents
Magnetic sensor test method and system Download PDFInfo
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- CN102798832B CN102798832B CN201110139844.0A CN201110139844A CN102798832B CN 102798832 B CN102798832 B CN 102798832B CN 201110139844 A CN201110139844 A CN 201110139844A CN 102798832 B CN102798832 B CN 102798832B
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Abstract
The invention relates to a magnetic sensor test method and a magnetic sensor test system. The X axis of a magnetic sensor to be tested is parallel to a direction of a ground magnetic field; a calibrated magnetic sensor test device is used for reading an output of the X axis of the magnetic sensor to be tested; and then a bias output and the sensitivity of the X axis of the magnetic sensor to be tested are calculated according to output data obtained by test. According to the magnetic sensor test method and the magnetic sensor test system, test is performed by using a magnetic field of the earth, so that the production cost of the magnetic sensor is greatly reduced, and the test efficiency is improved; and large-scale production and popularization of the magnetic sensor are facilitated.
Description
Technical field
The present invention relates to a kind of magnetic sensor test method and system thereof.
Background technology
Along with the expansion day by day of consumer electronics function, the application of sensor is progressively popularized, and Magnetic Sensor has become the standard configuration of some hand-held electronic product.
Due to the singularity of Magnetic Sensor, general production commercial city adopts special test macro to carry out producing, testing.So not only substantially increase the cost of Magnetic Sensor, and be unfavorable for popularization and the utilization of Magnetic Sensor.
Such as, in the test mode of an existing Magnetic Sensor, it utilizes coil to produce a uniform magnetic field, carrys out the size of controlling magnetic field, thus test by changing the electric current flowing through coil.In this test mode, the size of its coil, the installation accuracy of coil, and the size of electric current all directly can have influence on the uniformity coefficient in magnetic field, and then have influence on the performance index of product.And meanwhile, the area of the uniform magnetic field that coil can produce is very limited, further improves so again the complexity of test macro, reduces the efficiency of test macro, improves the testing cost of product.
Therefore, necessaryly provide a kind of novel magnetic sensor test method to overcome defect of the prior art.
Summary of the invention
Technical matters to be solved by this invention is, existing Magnetic Sensor test mode cost is high, efficiency is low.The invention provides a kind of method of testing of Magnetic Sensor, it utilizes magnetic field of the earth to carry out the test of Magnetic Sensor, effectively reduces testing cost, and greatly improves testing efficiency.
In order to solve the problems of the technologies described above, technical scheme proposed by the invention is: a kind of magnetic sensor test method, comprising:
The X-axis of proving installation is parallel with the magnetic line of force when terrestrial magnetic field;
Use the magnetic field parameter of the interface X-axis of preferred circuit calibrated tester;
By on the interface of Magnetic Sensor access proving installation to be measured, now X-axis is parallel with the magnetic line of force of terrestrial magnetic field, reads the output X1 of sensor to be measured;
Rotate Magnetic Sensor to be measured 180 degree, read the output X2 of Magnetic Sensor to be measured;
According to output X1 and X2 of Magnetic Sensor to be measured, calculate biased output and/or the sensitivity of Magnetic Sensor X-axis to be measured.
Further, in different embodiments, the method for testing that the present invention relates to, can also be extended to test multiaxis Magnetic Sensor, such as, 2 axial magnetic sensors, on 3 axial magnetic sensors.
Further, in the embodiment of test 2 axial magnetic sensors, the magnetic sensor test method that the present invention relates to, includes following steps:
The X-axis of proving installation is parallel with the magnetic line of force when terrestrial magnetic field, and Y-axis is then vertical with the magnetic line of force;
Use the X of preferred circuit calibrated tester interface, the magnetic field parameter of Y-axis;
By on the interface of Magnetic Sensor access proving installation to be measured, now X-axis is parallel with the magnetic line of force of terrestrial magnetic field, reads the output X1 of now sensor to be measured;
The XY plane dextrorotation of Magnetic Sensor to be measured turn 90 degrees, now Y-axis is parallel with direction, terrestrial magnetic field, reads the output Y1 of now sensor to be measured;
The XY plane dextrorotation of Magnetic Sensor to be measured turn 90 degrees, now X-axis is parallel with direction, terrestrial magnetic field, reads the output X2 of now sensor to be measured;
The XY plane dextrorotation of Magnetic Sensor to be measured turn 90 degrees, now Y-axis is parallel with direction, terrestrial magnetic field, reads the output Y2 of now sensor to be measured;
According to output X1, X2 and Y1, the Y2 of Magnetic Sensor to be measured, calculate Magnetic Sensor X to be measured, the biased output of Y-axis and/or sensitivity.
Further, in the embodiment of test 3 axial magnetic sensors, the magnetic sensor test method that the present invention relates to, includes following steps:
The X-axis of proving installation is parallel with the magnetic line of force when terrestrial magnetic field, and Y, Z axis are then vertical with the magnetic line of force;
Use X, Y of preferred circuit calibrated tester interface and the magnetic field parameter of Z axis;
By on the interface of Magnetic Sensor access proving installation to be measured, now X-axis is parallel with the magnetic line of force of terrestrial magnetic field, reads the output X1 of now sensor to be measured;
The XY plane dextrorotation of Magnetic Sensor to be measured turn 90 degrees, now Y-axis is parallel with direction, terrestrial magnetic field, reads the output Y1 of now sensor to be measured;
The XY plane dextrorotation of Magnetic Sensor to be measured turn 90 degrees, now X-axis is parallel with direction, terrestrial magnetic field, reads the output X2 of now sensor to be measured;
The XY plane dextrorotation of Magnetic Sensor to be measured turn 90 degrees, now Y-axis is parallel with direction, terrestrial magnetic field, reads the output Y2 of now sensor to be measured;
The Z axis dextrorotation of Magnetic Sensor to be measured turn 90 degrees, now Z axis is parallel with direction, terrestrial magnetic field, reads the output Z1 of now sensor to be measured.
The Z axis of Magnetic Sensor to be measured is rotated counterclockwise 180 degree, and now Z axis is parallel with direction, terrestrial magnetic field, reads the output Z2 of now sensor to be measured.
According to output X1, X2, Y1, Y2 and Z1, the Z2 of Magnetic Sensor to be measured, calculate biased output and/or the sensitivity of Magnetic Sensor X, Y to be measured and Z axis.
Further, in the method for testing that the present invention relates to, the proving installation of involved use can be the known Magnetic Sensor proving installation of industry.
Further, in the method for testing that the present invention relates to, the formula that each axle of calculating Magnetic Sensor of involved use is biased output is: X is biased output=(X1+X2)/2; Y is biased output=(Y1+Y2)/2; And biased output=(Z1+Z2)/2 of Z.
Further, in the method for testing that the present invention relates to, the formula of each axle sensitivity of calculating Magnetic Sensor of involved use is: X sensitivity=this position, (X1-X2)/2/ X penalty coefficient; Y sensitivity=this position, (Y1-Y2)/2/ Y penalty coefficient; And Z sensitivity=this position, (Z1-Z2)/2/ Z penalty coefficient.
Further, another aspect of the present invention additionally provides a kind of Magnetic Sensor test macro, and it can operate the magnetic sensor test method implementing the present invention relates to.
Its technical scheme used is: a kind of Magnetic Sensor test macro, comprising: Magnetic Sensor proving installation, data processing equipment and rotating shaft; Wherein proving installation is provided with the interface for connecting Magnetic Sensor to be measured, and interface is connected with preferred circuit and calibrates its magnetic field parameter by it; Rotating shaft is connected with interface and mobile interface can be with to carry out pivot rotation; The Magnetic Sensor to be measured that data processing equipment then connects for the treatment of proving installation interface is in test process, and the magnetic field of reading exports data, and then draws biased output and/or the sensitivity information of Magnetic Sensor to be measured.
Further, in different embodiments, wherein Magnetic Sensor test macro also includes CD-ROM drive motor, and it is connected with rotating shaft, and drive shaft pivot rotates.
Further, in different embodiments, wherein Magnetic Sensor test macro also includes data output device, and it is connected with data processing equipment.Such as, it can be display, printer, facsimile recorder etc.It, for exporting the data processed result of data processing equipment, obtains the test result of Magnetic Sensor to be measured for operating personnel.
Compared with prior art, the invention has the beneficial effects as follows: the single shaft that the present invention relates to or multiaxis magnetic sensor test method and system thereof, the test of Magnetic Sensor to be measured is carried out based on magnetic field of the earth, significantly reduce the production cost of Magnetic Sensor, also improve testing efficiency simultaneously, be conducive to the large-scale production of Magnetic Sensor and popularize.
Accompanying drawing explanation
Fig. 1 is the building-block of logic of the Magnetic Sensor test macro that the present invention relates to.
Embodiment
The specific embodiment of the present invention is described in detail below in conjunction with accompanying drawing.
In the embodiment of a magnetic sensor test method that the present invention relates to, Magnetic Sensor to be measured is 3 axial magnetic sensors, and it includes following steps:
The X-axis of proving installation is parallel with the magnetic line of force when terrestrial magnetic field, and Y, Z axis are then vertical with the magnetic line of force;
Use X, Y of preferred circuit calibrated tester interface and the magnetic field parameter of Z axis;
By on the interface of Magnetic Sensor access proving installation to be measured, now X-axis is parallel with the magnetic line of force of terrestrial magnetic field, reads the output X1 of now sensor to be measured;
The XY plane dextrorotation of Magnetic Sensor to be measured turn 90 degrees, now Y-axis is parallel with direction, terrestrial magnetic field, reads the output Y1 of now sensor to be measured;
The XY plane dextrorotation of Magnetic Sensor to be measured turn 90 degrees, now X-axis is parallel with direction, terrestrial magnetic field, reads the output X2 of now sensor to be measured;
The XY plane dextrorotation of Magnetic Sensor to be measured turn 90 degrees, now Y-axis is parallel with direction, terrestrial magnetic field, reads the output Y2 of now sensor to be measured;
The Z axis dextrorotation of Magnetic Sensor to be measured turn 90 degrees, now Z axis is parallel with direction, terrestrial magnetic field, reads the output Z1 of now sensor to be measured.
The Z axis of Magnetic Sensor to be measured is rotated counterclockwise 180 degree, and now Z axis is parallel with direction, terrestrial magnetic field, reads the output Z2 of now sensor to be measured.
According to output X1, X2, Y1, Y2, Z1, Z2 of Magnetic Sensor to be measured, calculate biased output and the sensitivity of Magnetic Sensor X, Y to be measured and Z axis.
The formula that wherein the involved each axle of calculating Magnetic Sensor used is biased output is: X is biased output=(X1+X2)/2; Y is biased output=(Y1+Y2)/2; Z is biased output=(Z1+Z2)/2.
The formula of the involved each axle sensitivity of calculating Magnetic Sensor used is: X sensitivity=this position, (X1-X2)/2/ X penalty coefficient; Y sensitivity=this position, (Y1-Y2)/2/ Y penalty coefficient; Z sensitivity=this position, (Z1-Z2)/2/ Z penalty coefficient.
Further, in the method for testing more than related to, the proving installation of involved use can be the known Magnetic Sensor proving installation of industry.
Further, another aspect of the present invention additionally provides a kind of Magnetic Sensor test macro, and it can operate the magnetic sensor test method implementing the present invention relates to.
As shown in Figure 1, a kind of Magnetic Sensor test macro, includes Magnetic Sensor proving installation, data processing equipment, data output device, rotating shaft and motor; Wherein proving installation is provided with the interface for connecting Magnetic Sensor to be measured, and interface is connected with preferred circuit and calibrates its magnetic field parameter by it; Rotating shaft is connected with interface and mobile interface can be with under the driving of motor to carry out pivot rotation; The Magnetic Sensor to be measured that data processing equipment then connects for the treatment of proving installation interface is in test process, and the magnetic field of reading exports data, and then draws biased output or the sensitivity information of Magnetic Sensor to be measured; Data output device then for exporting the data processed result of data processing equipment, obtains the test data of Magnetic Sensor to be measured for operating personnel.
Further, the data processing equipment wherein related to can be the data processing equipment based on modem computer systems hardware and software thereof.Data output device can be display, printer, facsimile recorder etc.
The single shaft that the present invention relates to or multiaxis magnetic sensor test method and system thereof, utilizing magnetic field of the earth to replace field coil, by changing the position of Magnetic Sensor to be measured in magnetic field of the earth, achieving the test to Magnetic Sensor.Adopt the data processing equipment based on computer system simultaneously, greatly reduce testing cost, improve testing efficiency, be conducive to the large-scale production of Magnetic Sensor and popularize.
The foregoing is only better embodiment of the present invention; protection scope of the present invention is not limited with above-mentioned embodiment; in every case those of ordinary skill in the art modify or change according to the equivalence that disclosure of the present invention is done, and all should include in the protection domain recorded in claims.
Claims (4)
1. a magnetic sensor test method, is characterized in that: Magnetic Sensor to be measured is magnetic sensor, and it includes following steps:
The X-axis of proving installation is parallel with the magnetic line of force when terrestrial magnetic field, and Y, Z axis are then vertical with the magnetic line of force;
Use interface X, Y of preferred circuit calibrated tester and the magnetic field parameter of Z axis;
By on the interface of Magnetic Sensor access proving installation to be measured, now X-axis is parallel with the magnetic line of force of terrestrial magnetic field, reads the output X1 of sensor to be measured;
The XY plane dextrorotation of Magnetic Sensor to be measured turn 90 degrees, now Y-axis is parallel with direction, terrestrial magnetic field, reads the output Y1 of now sensor to be measured;
The XY plane dextrorotation of Magnetic Sensor to be measured turn 90 degrees, now X-axis is parallel with direction, terrestrial magnetic field, reads the output X2 of now sensor to be measured;
The XY plane dextrorotation of Magnetic Sensor to be measured turn 90 degrees, now Y-axis is parallel with direction, terrestrial magnetic field, reads the output Y2 of now sensor to be measured;
The Z axis dextrorotation of Magnetic Sensor to be measured turn 90 degrees, now Z axis is parallel with direction, terrestrial magnetic field, reads the output Z1 of now sensor to be measured;
The Z axis of Magnetic Sensor to be measured is rotated counterclockwise 180 degree, and now Z axis is parallel with direction, terrestrial magnetic field, reads the output Z2 of now sensor to be measured;
According to output X1, X2, Y1, Y2, Z1, Z2 of Magnetic Sensor to be measured, calculate biased output and the sensitivity of Magnetic Sensor X, Y to be measured and Z axis,
The formula that each axle of calculating Magnetic Sensor to be measured wherein relating to use is biased output includes at least one in following formula: X is biased output=(X1+X2)/2, Y is biased output=(Y1+Y2)/2, and biased output=(Z1+Z2)/2 of Z
The formula wherein relating to calculating Magnetic Sensor to be measured each axle sensitivity of use includes at least one in following formula: X sensitivity=this position, (X1-X2)/2/ X penalty coefficient, Y sensitivity=this position, (Y1-Y2)/2/ Y penalty coefficient, and Z sensitivity=this position, (Z1-Z2)/2/ Z penalty coefficient.
2., for implementing a Magnetic Sensor test macro for magnetic sensor test method as claimed in claim 1, it is characterized in that, it includes: Magnetic Sensor proving installation, data processing equipment and rotating shaft; Wherein proving installation is provided with the interface for connecting Magnetic Sensor to be measured, and interface is connected with preferred circuit and calibrates its magnetic field parameter by it; Rotating shaft is connected with interface and mobile interface can be with to carry out pivot rotation; The Magnetic Sensor to be measured that data processing equipment then connects for the treatment of proving installation interface is in test process, and the magnetic field of reading exports data, and then draws biased output and/or the sensitivity information of Magnetic Sensor to be measured.
3. test macro as claimed in claim 2, it is characterized in that, it also includes CD-ROM drive motor, and it is connected with rotating shaft, and drive shaft pivot rotates.
4. test macro as claimed in claim 2, it is characterized in that, it also includes data output device, and it is connected with data processing equipment.
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| CN201110139844.0A CN102798832B (en) | 2011-05-27 | 2011-05-27 | Magnetic sensor test method and system |
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| CN201110139844.0A CN102798832B (en) | 2011-05-27 | 2011-05-27 | Magnetic sensor test method and system |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103885008B (en) * | 2012-12-19 | 2016-08-10 | 京元电子股份有限公司 | Magnetic force method for measurement |
| KR101552922B1 (en) * | 2013-08-08 | 2015-09-15 | 매그나칩 반도체 유한회사 | Magnetic sensor test apparatus and method |
| CN103969615B (en) * | 2014-05-07 | 2017-02-15 | 上海海事大学 | Method for calibration of parameters of single-axis fluxgate sensor |
| CN104834021B (en) * | 2015-05-11 | 2018-06-22 | 上海集成电路研发中心有限公司 | A kind of computational methods of geomagnetic sensor sensitivity |
| CN105259529B (en) * | 2015-11-23 | 2018-06-05 | 上海卫星装备研究所 | Satellite magnetic field tests system calibration equipment and calibration method |
| CN110133561B (en) * | 2019-07-01 | 2021-02-05 | 合肥工业大学 | Main magnet uniformity detection and analysis device and method of MRI (magnetic resonance imaging) equipment |
| CN113495231A (en) * | 2021-09-10 | 2021-10-12 | 深圳市柯雷科技开发有限公司 | Zero-bias-temperature-drift-free direct-current magnetic field measurement system and method |
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