CN102798832A - Magnetic sensor test method and system - Google Patents
Magnetic sensor test method and system Download PDFInfo
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- CN102798832A CN102798832A CN2011101398440A CN201110139844A CN102798832A CN 102798832 A CN102798832 A CN 102798832A CN 2011101398440 A CN2011101398440 A CN 2011101398440A CN 201110139844 A CN201110139844 A CN 201110139844A CN 102798832 A CN102798832 A CN 102798832A
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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 method of testing and system thereof.
Background technology
Along with the expansion day by day of consumer electronics function, application of sensor is progressively popularized, and Magnetic Sensor has become the standard configuration of some hand-held electronic product.
Because the singularity of Magnetic Sensor, general production commercial city adopt special test macro to produce, test.So not only improve the cost of Magnetic Sensor greatly, and be unfavorable for the popularization and the utilization of Magnetic Sensor.
For example, in the test mode of an existing Magnetic Sensor, it is to utilize coil to produce a uniform magnetic field, and the electric current that flows through coil through change comes the size of controlling magnetic field, thereby tests.In this test mode, the size of coil wherein, the installation accuracy of coil, and the size of electric current all can directly have influence on the uniformity coefficient in magnetic field, and then have influence on the performance of products index.And meanwhile, the area of the uniform magnetic field that coil can produce is very limited, has further improved the complexity of test macro so again, has reduced the efficient of test macro, has improved the testing cost of product.
Therefore, necessaryly provide a kind of novel Magnetic Sensor method of testing to overcome defective of the prior art.
Summary of the invention
Technical matters to be solved by this invention is that existing Magnetic Sensor test mode cost is high, efficient is low.The present invention provides a kind of method of testing of Magnetic Sensor, and it utilizes the magnetic field of the earth to carry out the test of Magnetic Sensor, has effectively reduced testing cost, and has improved testing efficiency greatly.
In order to solve the problems of the technologies described above, technical scheme proposed by the invention is: a kind of Magnetic Sensor method of testing comprises:
The X axle of proving installation is parallel with the magnetic line of force when the terrestrial magnetic field;
Use the magnetic field parameter of the interface X axle of preferred circuit calibrated tester;
Magnetic Sensor to be measured is inserted on the interface of proving installation, this moment, the X axle was parallel with the magnetic line of force of terrestrial magnetic field, read the output X1 of sensor to be measured;
Rotate Magnetic Sensor 180 degree to be measured, read the output X2 of Magnetic Sensor to be measured;
According to the output X1 and the X2 of Magnetic Sensor to be measured, calculate the biasing output and/or the sensitivity of Magnetic Sensor X axle 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, and for example, 2 axial magnetic sensors are on 3 axial magnetic sensors.
Further, in the embodiment of test 2 axial magnetic sensors, the Magnetic Sensor method of testing that the present invention relates to includes following steps:
The X axle of proving installation is parallel with the magnetic line of force when the terrestrial magnetic field, and the Y axle is then vertical with the magnetic line of force;
Use the X of preferred circuit calibrated tester interface, the magnetic field parameter of Y axle;
Magnetic Sensor to be measured is inserted on the interface of proving installation, this moment, the X axle was parallel with the magnetic line of force of terrestrial magnetic field, read the output X1 of sensor to be measured this moment;
The XY plane dextrorotation of Magnetic Sensor to be measured is turn 90 degrees, and this moment, the Y axle was parallel with the terrestrial magnetic field direction, read the output Y1 of sensor to be measured this moment;
The XY plane dextrorotation of Magnetic Sensor to be measured is turn 90 degrees, and this moment, the X axle was parallel with the terrestrial magnetic field direction, read the output X2 of sensor to be measured this moment;
The XY plane dextrorotation of Magnetic Sensor to be measured is turn 90 degrees, and this moment, the Y axle was parallel with the terrestrial magnetic field direction, read the output Y2 of sensor to be measured this moment;
According to output X1, X2 and Y1, the Y2 of Magnetic Sensor to be measured, calculate the biasing output and/or the sensitivity of Magnetic Sensor X to be measured, Y axle.
Further, in the embodiment of test 3 axial magnetic sensors, the Magnetic Sensor method of testing that the present invention relates to includes following steps:
The X axle of proving installation is parallel with the magnetic line of force when the terrestrial magnetic field, and Y, Z axle are then vertical with the magnetic line of force;
Use the magnetic field parameter of X, Y and the Z axle of preferred circuit calibrated tester interface;
Magnetic Sensor to be measured is inserted on the interface of proving installation, this moment, the X axle was parallel with the magnetic line of force of terrestrial magnetic field, read the output X1 of sensor to be measured this moment;
The XY plane dextrorotation of Magnetic Sensor to be measured is turn 90 degrees, and this moment, the Y axle was parallel with the terrestrial magnetic field direction, read the output Y1 of sensor to be measured this moment;
The XY plane dextrorotation of Magnetic Sensor to be measured is turn 90 degrees, and this moment, the X axle was parallel with the terrestrial magnetic field direction, read the output X2 of sensor to be measured this moment;
The XY plane dextrorotation of Magnetic Sensor to be measured is turn 90 degrees, and this moment, the Y axle was parallel with the terrestrial magnetic field direction, read the output Y2 of sensor to be measured this moment;
The Z axle dextrorotation of Magnetic Sensor to be measured is turn 90 degrees, and this moment, the Z axle was parallel with the terrestrial magnetic field direction, read the output Z1 of sensor to be measured this moment.
The Z axle of Magnetic Sensor to be measured is rotated counterclockwise 180 degree, and this moment, the Z axle was parallel with the terrestrial magnetic field direction, read the output Z2 of sensor to be measured this moment.
According to output X1, X2, Y1, Y2 and Z1, the Z2 of Magnetic Sensor to be measured, calculate the biasing output and/or the sensitivity of Magnetic Sensor X to be measured, Y and Z axle.
Further, in the method for testing that the present invention relates to, the proving installation of related 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 of each biasing output of the calculating Magnetic Sensor of related use is: X biasing output=(X1+X2)/2; Y biasing output=(Y1+Y2)/2; And Z biasing output=(Z1+Z2)/2.
Further, in the method for testing that the present invention relates to, the formula of each sensitivity of calculating Magnetic Sensor of related use is: this position X penalty coefficient of X sensitivity=(X1-X2)/2/; This position Y penalty coefficient of Y sensitivity=(Y1-Y2)/2/; And this position Z penalty coefficient of Z sensitivity=(Z1-Z2)/2/.
Further, another aspect of the present invention also provides a kind of Magnetic Sensor test macro, and it can operate the Magnetic Sensor method of testing that embodiment of the present invention relates to.
Its employed technical scheme is: a kind of Magnetic Sensor test macro comprises: Magnetic Sensor proving installation, data processing equipment and rotating shaft; Wherein proving installation is provided with the interface that is used to connect Magnetic Sensor to be measured, and interface is connected with preferred circuit and calibrate its magnetic field parameter by it; Rotating shaft is connected with interface and can drives interface carries out the pivot rotation; Data processing equipment then is used for handling Magnetic Sensor to be measured that the proving installation interface connects at test process, the magnetic field output data of reading, and then draw the biasing output and/or the sensitivity information of Magnetic Sensor to be measured.
Further, in different embodiments, wherein the Magnetic Sensor test macro also includes CD-ROM drive motor, and it is connected with rotating shaft, and drives the rotation of rotating shaft pivot.
Further, in different embodiments, wherein the Magnetic Sensor test macro also includes data output device, and it is connected with data processing equipment.For example, it can be display, printer, facsimile recorder or the like.It is used for the data processed result of output data treating apparatus, 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 method of testing and system thereof; Carry out the test of Magnetic Sensor to be measured based on the magnetic field of the earth; Greatly reduced the production cost of Magnetic Sensor, also improved testing efficiency simultaneously, the large-scale production that helps Magnetic Sensor is with universal.
Description of drawings
Fig. 1 is the building-block of logic of the Magnetic Sensor test macro that the present invention relates to.
Embodiment
Specify embodiment of the present invention below in conjunction with accompanying drawing.
In the embodiment of a Magnetic Sensor method of testing that the present invention relates to, Magnetic Sensor to be measured is one 3 axial magnetic sensor, and it includes following steps:
The X axle of proving installation is parallel with the magnetic line of force when the terrestrial magnetic field, and Y, Z axle are then vertical with the magnetic line of force;
Use the magnetic field parameter of X, Y and the Z axle of preferred circuit calibrated tester interface;
Magnetic Sensor to be measured is inserted on the interface of proving installation, this moment, the X axle was parallel with the magnetic line of force of terrestrial magnetic field, read the output X1 of sensor to be measured this moment;
The XY plane dextrorotation of Magnetic Sensor to be measured is turn 90 degrees, and this moment, the Y axle was parallel with the terrestrial magnetic field direction, read the output Y1 of sensor to be measured this moment;
The XY plane dextrorotation of Magnetic Sensor to be measured is turn 90 degrees, and this moment, the X axle was parallel with the terrestrial magnetic field direction, read the output X2 of sensor to be measured this moment;
The XY plane dextrorotation of Magnetic Sensor to be measured is turn 90 degrees, and this moment, the Y axle was parallel with the terrestrial magnetic field direction, read the output Y2 of sensor to be measured this moment;
The Z axle dextrorotation of Magnetic Sensor to be measured is turn 90 degrees, and this moment, the Z axle was parallel with the terrestrial magnetic field direction, read the output Z1 of sensor to be measured this moment.
The Z axle of Magnetic Sensor to be measured is rotated counterclockwise 180 degree, and this moment, the Z axle was parallel with the terrestrial magnetic field direction, read the output Z2 of sensor to be measured this moment.
According to output X1, X2, Y1, Y2, Z1, the Z2 of Magnetic Sensor to be measured, calculate the biasing output and the sensitivity of Magnetic Sensor X to be measured, Y and Z axle.
Wherein the formula of each biasing output of the calculating Magnetic Sensor of related use is: X biasing output=(X1+X2)/2; Y biasing output=(Y1+Y2)/2; Z biasing output=(Z1+Z2)/2.
The formula of each sensitivity of calculating Magnetic Sensor of related use is: this position X penalty coefficient of X sensitivity=(X1-X2)/2/; This position Y penalty coefficient of Y sensitivity=(Y1-Y2)/2/; This position Z penalty coefficient of Z sensitivity=(Z1-Z2)/2/.
Further, in the method for testing that more than relates to, the proving installation of related use can be the known Magnetic Sensor proving installation of industry.
Further, another aspect of the present invention also provides a kind of Magnetic Sensor test macro, and it can operate the Magnetic Sensor method of testing that embodiment of 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 that is used to connect Magnetic Sensor to be measured, and interface is connected with preferred circuit and calibrate its magnetic field parameter by it; Rotating shaft is connected with interface and under the driving of motor, can drives interface carries out the pivot rotation; Data processing equipment then is used for handling Magnetic Sensor to be measured that the proving installation interface connects at test process, the magnetic field output data of reading, and then draw the biasing output or the sensitivity information of Magnetic Sensor to be measured; Data output device then is used for the data processed result of output data treating apparatus, obtains the test data of Magnetic Sensor to be measured for operating personnel.
Further, the data processing equipment that wherein relates to can be based on the data processing equipment of modem computer systems hardware and software thereof.Data output device can be display, printer, facsimile recorder or the like.
The single shaft that the present invention relates to or multiaxis Magnetic Sensor method of testing and system thereof utilize the magnetic field of the earth to replace field coil, through changing the position of Magnetic Sensor to be measured in the magnetic field of the earth, have realized the test to Magnetic Sensor.Adopt the data processing equipment based on computer system simultaneously, greatly reduce testing cost, improved testing efficiency, the large-scale production that helps Magnetic Sensor is with universal.
The above is merely preferred embodiments of the present invention; Protection scope of the present invention is not exceeded with above-mentioned embodiment; In every case those of ordinary skills' equivalence that disclosure is done according to the present invention is modified or is changed, and all should include in the protection domain of putting down in writing in claims.
Claims (8)
1. Magnetic Sensor method of testing, it is characterized in that: it includes following steps:
The X axle of proving installation is parallel with the magnetic line of force when the terrestrial magnetic field;
Use the magnetic field parameter of the interface X axle of preferred circuit calibrated tester;
Magnetic Sensor to be measured is inserted on the interface of proving installation, this moment, the X axle was parallel with the magnetic line of force of terrestrial magnetic field, read the output X1 of sensor to be measured;
Rotate Magnetic Sensor 180 degree to be measured, read the output X2 of Magnetic Sensor to be measured;
According to the output X1 and the X2 of Magnetic Sensor to be measured, calculate the biasing output and/or the sensitivity of Magnetic Sensor X axle to be measured.
2. the method for claim 1 is characterized in that, it also includes the step of test Magnetic Sensor Y axle to be measured, and it includes:
Use the magnetic field parameter of the interface Y axle of preferred circuit calibrated tester;
Magnetic Sensor to be measured is inserted on the interface of proving installation, this moment, its Y axle was parallel with the magnetic line of force of terrestrial magnetic field, read the output Y1 of sensor to be measured;
Rotate Magnetic Sensor 180 degree to be measured, read the output Y2 of Magnetic Sensor to be measured;
According to the output Y1 and the Y2 of Magnetic Sensor to be measured, calculate the biasing output and/or the sensitivity of Magnetic Sensor Y axle to be measured.
3. the method for claim 1 is characterized in that, it also includes the step of test Magnetic Sensor Z axle to be measured, and it includes:
Use the magnetic field parameter of the interface Z axle of preferred circuit calibrated tester;
Magnetic Sensor to be measured is inserted on the interface of proving installation, this moment, its Z axle was parallel with the magnetic line of force of terrestrial magnetic field, read the output Z1 of sensor to be measured;
Rotate Magnetic Sensor 180 degree to be measured, read the output Z2 of Magnetic Sensor to be measured;
According to the output Z1 and the Z2 of Magnetic Sensor to be measured, calculate the biasing output and/or the sensitivity of Magnetic Sensor Y axle to be measured.
4. the method for claim 1 is characterized in that, the formula that wherein relates to each biasing output of calculating Magnetic Sensor to be measured of use includes at least one in the following formula: X biasing to be exported=(X1+X2)/2; Y biasing output=(Y1+Y2)/2; And Z biasing output=(Z1+Z2)/2.
5. the method for claim 1 is characterized in that, the formula that wherein relates to calculating each sensitivity of Magnetic Sensor to be measured of use includes at least one in the following formula: this position X penalty coefficient of X sensitivity=(X1-X2)/2/; This position Y penalty coefficient of Y sensitivity=(Y1-Y2)/2/; And this position Z penalty coefficient of Z sensitivity=(Z1-Z2)/2/.
6. one kind is used to implement the Magnetic Sensor test macro of Magnetic Sensor method of testing according to 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 that is used to connect Magnetic Sensor to be measured, and interface is connected with preferred circuit and calibrate its magnetic field parameter by it; Rotating shaft is connected with interface and can drives interface carries out the pivot rotation; Data processing equipment then is used for handling Magnetic Sensor to be measured that the proving installation interface connects at test process, the magnetic field output data of reading, and then draw the biasing output and/or the sensitivity information of Magnetic Sensor to be measured.
7. test macro as claimed in claim 6 is characterized in that it also includes CD-ROM drive motor, and it is connected with rotating shaft, and drives the rotation of rotating shaft pivot.
8. test macro as claimed in claim 6 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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| CN104834021A (en) * | 2015-05-11 | 2015-08-12 | 上海集成电路研发中心有限公司 | Method for calculating sensitivity of geomagnetic sensor |
| CN105259529A (en) * | 2015-11-23 | 2016-01-20 | 上海卫星装备研究所 | Device and method of calibration of satellite magnetic field test system |
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| 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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| CN103969615A (en) * | 2014-05-07 | 2014-08-06 | 上海海事大学 | Method for calibration of parameters of single-axis fluxgate sensor |
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| CN105259529A (en) * | 2015-11-23 | 2016-01-20 | 上海卫星装备研究所 | Device and method of calibration of satellite magnetic field test system |
| 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 |
| CN110133561A (en) * | 2019-07-01 | 2019-08-16 | 合肥工业大学 | A kind of MRI machine main magnet uniformity detection and analysis devices and methods therefor |
| 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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| CN102798832B (en) | 2014-12-31 |
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