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An Error Correction Method for Measurement Datum and Structural Datum of Three-axis Magnetic Sensor

A magnetic sensor and measurement reference technology, which is applied in the field of testing, can solve the problems of low calibration accuracy and the structure of the magnetic sensor itself becomes larger, and achieve the effect of high calibration accuracy and good repeatability

Inactive Publication Date: 2018-12-25
RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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Problems solved by technology

This solution makes the structure of the magnetic sensor itself larger and reduces its structural strength, but the calibration accuracy is low, and the deviation caused by factors such as vibration, temperature, and movement introduced by the environment cannot be corrected, and it is not suitable for high-precision calibration requirements. use
[0006] The second requires an external specialized structural calibration correction tool
The traditional method only relies on the structural accuracy and processing accuracy of the magnetic sensor to ensure that the deviation is not corrected or calibrated

Method used

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  • An Error Correction Method for Measurement Datum and Structural Datum of Three-axis Magnetic Sensor
  • An Error Correction Method for Measurement Datum and Structural Datum of Three-axis Magnetic Sensor
  • An Error Correction Method for Measurement Datum and Structural Datum of Three-axis Magnetic Sensor

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Embodiment Construction

[0090] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0091] The invention proposes a digital correction method to eliminate the errors among the measurement reference, the structure reference and the installation reference of the three-axis magnetic sensor. figure 1 It is a schematic diagram of the structure and function of a three-axis non-magnetic turntable. The three-axis magnetic sensor and the three-axis non-magnetic turntable need to meet the following conditions:

[0092] 1. The three-axis magnetic sensor can detect three weak magnetic field vector values ​​in orthogonal directions;

[0093] 2. The three-axis magnetic sensor has completed the temperature drift coefficient calibration, that is, the three-axis magnetic sensor has been calibrated and corrected the deviation of the three-axis magnetic measurement value introduced by its own temperature change;

[0094] 3. The three-axis magnetic sensor has...

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Abstract

The invention provides an error correction method for a measuring datum and a structural benchmark of a tri-axial magnetic sensor. With a digital correction method, errors among a measuring datum, a structural benchmark, and a mounting benchmark of a tri-axial magnetic detector are eliminated. Under the circumstance that the structure precision and the assembling precision are not improved, the tri-axial magnetic sensor can reach high precision and accuracy. Different types of tri-axial magnetic sensors can be controlled at high precision levels and the performance consistency is guaranteed. The provided correction method is simple and effective; and the repeatability and correction precision are high.

Description

technical field [0001] The invention belongs to the field of test technology, and in particular relates to an error correction method for a three-axis magnetic sensor measurement standard and a structural standard. Background technique [0002] The three-axis magnetic sensor is a basic tool for space magnetic field detection. Because it can obtain high-precision space weak magnetic field vector data, it is widely used in the fields of navigation, aviation, and aerospace to complete magnetic measurement, navigation, and attitude adjustment. [0003] When using space magnetic field vector data, it is usually necessary to measure the magnetic field data based on the carrier structure coordinate system of the magnetometer installation platform, and the measurement of the space magnetic field by the magnetometer is completed based on the measurement coordinate system of the magnetic sensor itself. For the high-precision three-axis magnetic sensor used in the aerospace field, the ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V3/40G01V13/00G01R33/02G01R35/00
CPCG01R33/02G01R33/0206G01R35/00G01V3/40G01V13/00
Inventor 靳瑾孟相光陈曦匡麟玲
Owner RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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