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Rotating body error compensation and experiment method for three-axis magnetic sensor

A technology of error compensation and experimental method, applied in the direction of instruments, measuring devices, etc., can solve the problems of magnetic sensor interference, magnetic sensor technology, installation error, etc., to ensure accuracy and reliability, solve the divergence of geomagnetic data, and effectively solve the problem of geomagnetic data. Divergent effect

Inactive Publication Date: 2021-11-09
NANJING UNIV OF SCI & TECH
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Problems solved by technology

The earth's magnetic field is a weak magnetic field, and the magnetic sensor is easily disturbed by the external magnetic field, and the magnetic sensor itself also has errors such as process and installation.

Method used

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  • Rotating body error compensation and experiment method for three-axis magnetic sensor
  • Rotating body error compensation and experiment method for three-axis magnetic sensor
  • Rotating body error compensation and experiment method for three-axis magnetic sensor

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Experimental program
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Embodiment

[0063] Such as figure 2 As shown, a rotating body error compensation experiment method for a three-axis magnetic sensor is as follows: place the rotating body of the component horizontally pointing north on a non-magnetic turntable, and every 45° clockwise rotation of the turntable is a measurement point, and at each measurement point Rotate the rotating body at a constant speed along the x-axis of the rotating body, and rotate forward and backward for more than 3 times respectively, so that the geomagnetic values ​​of the oblique axis y and the vertical axis z of the original value of the geomagnetic field satisfy a smooth sinusoidal waveform, and the phase difference

[0064] The embedded processor uses the STM32F7 chip. Before the error compensation experiment, the host computer initializes the local geomagnetic value, temperature coefficient matrix C, and temperature zero bias matrix B for the processor STM32F7;

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Abstract

The invention discloses a rotating body error compensation and experiment method for a three-axis magnetic sensor. According to the actual environment where a rotating body is located, an error source is analyzed, and an error model containing temperature and environment influences is established; the environment error of the rotating body is compensated through ellipsoid fitting; and compensation verification is performed on the actual geomagnetic sensor by adopting a non-magnetic turntable and a plane rotation point acquisition method. According to the invention, the influence of the environmental magnetic field and the installation position on the output of the sensor is effectively solved, and the error calibration of the rotating body of the three-axis magnetic sensor under the interference of the magnetic environment can be realized.

Description

technical field [0001] The invention relates to a method for processing error-containing data, in particular to a rotating body error compensation and an experimental method for a three-axis magnetic sensor. Background technique [0002] Nowadays, more and more projects such as intelligent navigation and flying body guidance and control use geomagnetism to realize attitude measurement and obtain rotating body attitude information. The earth's magnetic field is a weak magnetic field, and the magnetic sensor is extremely susceptible to interference from the external magnetic field, and the magnetic sensor itself also has errors such as process and installation. In order to obtain reliable and high-precision navigation information, effective error calibration and compensation must be carried out on the magnetic sensor. The ellipsoid fitting calibration method and the least square method can be applied in practical engineering because of their simplicity and easy implementation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C25/00
CPCG01C25/00
Inventor 管雪元尹上刘雨顺马训穷
Owner NANJING UNIV OF SCI & TECH
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