Space magnetic field generator device and space magnetic field generation method

A magnetic field generator, space magnetic field technology, applied in the size/direction of the magnetic field, magnetic field measurement using magneto-optical equipment, etc., can solve the static characteristic calibration error, the difficulty of the size and direction of the external magnetic field, and the difficulty of calibrating the space magnetic field vector sensor and other problems to achieve the effect of ensuring normal work, simple structure and improving measurement accuracy

Pending Publication Date: 2022-01-28
HEILONGJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most of the test systems for the static characteristics of magnetic field sensors are to adjust the magnitude of the magnetic field under a fixed magnetic field direction. During the test process, it is difficult to adjust the magnitude and direction of the external magnetic field at the same time, which makes it difficult to calibrate the space magnetic field vector sensor, and there are certain errors in the calibration of the static characteristics.

Method used

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  • Space magnetic field generator device and space magnetic field generation method
  • Space magnetic field generator device and space magnetic field generation method
  • Space magnetic field generator device and space magnetic field generation method

Examples

Experimental program
Comparison scheme
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Embodiment approach

[0072] According to a preferred embodiment of the present invention, the magnetic field generator unit 1 includes an electromagnetic coil 11, a magnetic field detection control module 12 and a temperature detection module 13, such as Figure 1~3 as shown,

[0073] Wherein, the electromagnetic coil 11 has two, and the two are coaxially arranged with a gap.

[0074] Preferably, magnetic cores are provided at the centers of the two electromagnetic coils, and the magnetic poles are 14 at adjacent positions.

[0075] In the present invention, after the electromagnetic coil is powered, a uniform magnetic field is generated between the two magnetic poles, from the N pole to the S pole, and the magnetic induction intensity generated by the electromagnetic coil is regulated by the magnetic field detection control module.

[0076] Wherein, the electromagnetic coil is connected with an external power supply 4 through wires to generate a magnetic field.

[0077] The inventors have found...

Embodiment

[0139] In this example, if Figure 1~5 As shown, the space magnetic field generator device includes a magnetic field generator unit, a 360° angle turntable unit, a chip test bench and a software control unit.

[0140] Among them, the support frame supports the angle turntable, and the magnetic field generator unit is embedded in the angle turntable. The wires of the electromagnetic coil inside the magnetic pole and the drive motor of the turntable are connected to the external power supply through the internal channel of the support frame. The specific specifications of the electromagnetic coil are: when two When the magnetic pole spacing is 3cm ~ 8cm, the coil can generate 10 -4 T~0.5T uniform magnetic field;

[0141] The test bench of the chip to be tested is placed in the middle of the magnetic pole, the chip to be tested (space magnetic vector sensor) is placed on the rotating platform, and connected to the pin row on the rotating platform through the interconnection line...

experiment example

[0145] At room temperature, the silicon magnetosensitive triode forms the sensor to be measured in the space magnetic field vector according to the orthogonal magnetic sensitivity direction, when the base current I B =4mA, collector load resistance R L =1.5kΩ, it is placed in the device described in embodiment 1 to apply a 150mT magnetic field, and the spatial magnetic field vector sensor to be tested is characterized, and the experimental results are as follows Figure 7-9 shown.

[0146] Figure 7-9 Show the output voltage of the two magnetic field vector sensors to be measured changing with their rotation angles when a 150mT magnetic field is applied to the xy, xz, and yz planes. Figure 7-9 It can be seen that the magnetic field device of the present invention can not only realize the function of generating a magnetic field in any plane in space, but also generate a magnetic field with high stability.

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Abstract

The invention discloses a space magnetic field generator device and a space magnetic field generation method adopting the same. The device comprises a magnetic field generator unit (1), a 360-degree angle turntable unit (2) and a to-be-tested chip test board (3), wherein the magnetic field generator unit (1), the 360-degree angle turntable unit (2) and the to-be-tested chip test board (3) are all controlled by a control unit; and a space magnetic field is applied to a to-be-tested chip. The space magnetic field generator device provided by the invention is simple in structure and convenient to operate, and fixed magnetic field loading can be carried out on the to-be-tested chip in an xy plane, an xz plane, a yz plane and any plane. The device is advantaged in that the magnetic field generated by the magnetic field generator unit and a rotating angle of the rotating platform can be automatically controlled through the control unit, precision is high, and errors are small.

Description

technical field [0001] The invention relates to the technical field of magnetic field generators, in particular to a constant magnetic field generating device, in particular to a space magnetic field generating device. Background technique [0002] With the continuous development of modern science and technology, magnetic field sensors (such as: Hall elements, magneto-sensitive diodes, magneto-transistors, AMR, GMR, TMR, etc.) have important applications in automotive electronics, aerospace, deep-sea exploration and other fields. As an important index to measure the performance of the sensor, the static characteristics of the sensor mainly include sensitivity, linearity, repeatability, hysteresis, zero temperature coefficient, sensitivity temperature coefficient, etc. The comprehensive index is accuracy. [0003] At present, most of the test systems for the static characteristics of magnetic field sensors adjust the magnitude of the magnetic field under a fixed magnetic fiel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/032
CPCG01R33/032
Inventor 赵晓锋柳微微钱程于志鹏温殿忠
Owner HEILONGJIANG UNIV
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