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Triaxial magnetometer testing device and method

A technology of three-axis magnetism and testing method, which can be applied to measuring devices, measuring electrical variables, instruments, etc., and can solve problems such as the lack of three-axis magnetometers.

Pending Publication Date: 2021-07-23
江苏中科院智能科学技术应用研究院
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Problems solved by technology

In the prior art, there is a lack of special measuring devices for three-axis magnetometers, which need to be improved

Method used

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  • Triaxial magnetometer testing device and method
  • Triaxial magnetometer testing device and method
  • Triaxial magnetometer testing device and method

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Embodiment Construction

[0025] The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0026] QMC5883L is the most common three-axis magnetometer. In an LGA package, the chip integrates an application-specific integrated circuit (ASIC) for magnetic sensors and signal processing, which can be used in high-performance applications such as drones, robots, mobile, compass in personal computers, navigation and gaming handheld devices. The QMC5883L is based on state-of-the-art high-resolution AMR magnetoresistive technology, together with a custom-designed 16-bit ADCASIC, it provides low noise, high precision, low power consumption, offset cancellation and temperature compensation. The I²C serial bus facilitates interfacing.

[0027] This application is based on the LABVIEW host computer, through the control of testing equipment such as Helmholtz coils, the laboratory's testing capabi...

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Abstract

The invention discloses a triaxial magnetometer testing device and method. The method is characterized in that the method comprises the following steps of: fixedly arranging coils in the X, Y and Z directions of a triaxial magnetometer; measuring the ratios of the current passing through the coils to the magnetic field values of the coils, and constructing a binary linear equation; constructing a peripheral circuit supporting the triaxial magnetometer, and placing the triaxial magnetometer on a triaxial magnetometer testing device; and based on the magnetic field values required by the coils and the binary linear equation, calculating a current value which should pass through the triaxial magnetometer, providing current corresponding to the current value and a magnetic field value required by the triaxial magnetometer for the triaxial magnetometer, and measuring the magnetic induction intensity output by the triaxial magnetometer. The magnetic induction intensity output by the magnetometer can be tested in different magnetic fields, data are processed, a visual magnetometer function curve is output, and meanwhile the power consumption of a triaxial magnetometer chip in different modes is measured through a high-precision ampere meter.

Description

technical field [0001] The invention relates to a three-axis magnetometer testing device and a three-axis magnetometer testing method, belonging to the technical field of three-axis magnetometer testing. Background technique [0002] The three-axis magnetometer is a device that indicates the direction by measuring the strength of the earth's magnetic field, and its output has the characteristics of continuity and no accumulation of errors. In the low-cost high-performance navigation system, the magnetometer is a key auxiliary sensor for attitude estimation, so it is widely used in the integrated navigation system of low-cost aircraft. In the parking system, the presence or absence of vehicles will cause small changes in the geomagnetism, so the three-axis magnetometer is a key component for vehicle detection in the parking system. The prior art lacks a dedicated measuring device for the three-axis magnetometer, which needs to be improved. Contents of the invention [000...

Claims

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Application Information

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IPC IPC(8): G01R35/00
CPCG01R35/00
Inventor 黄良
Owner 江苏中科院智能科学技术应用研究院
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