A Method for Correcting Accelerometer Zero Offset

An accelerometer, zero offset technology, applied in the direction of speed/acceleration/shock measurement, testing/calibration of speed/acceleration/shock measurement equipment, measurement devices, etc., to ensure measurement accuracy and solve the problem of zero offset change Effect

Active Publication Date: 2021-02-09
BEIJING AEROSPACE INST FOR METROLOGY & MEASUREMENT TECH +1
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Problems solved by technology

[0005] The object of the present invention is to provide a kind of accelerometer zero offset correction method, to overcome the defect of prior art means in solving the accelerometer zero offset problem

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  • A Method for Correcting Accelerometer Zero Offset
  • A Method for Correcting Accelerometer Zero Offset
  • A Method for Correcting Accelerometer Zero Offset

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Embodiment Construction

[0018] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] The basic principle of the horizontal inclination measurement based on the accelerometer is: the accelerometer measures the component of the acceleration of gravity on its sensitive axis to solve the horizontal inclination of the accelerometer sensitive axis, thereby realizing the measurement of the levelness. The spatial attitude of the carrier can be measured by installing two mutually orthogonal accelerometers. The measurement principle of the uniaxial accelerometer is as follows: figure 1 shown.

[0020] figure 1 In , the sensitive direction of the accelerometer coincides with the X-axis, and when the accelerometer rotates at an inclination angle θ in the plane where the X-axis and the direction of the gravity acceleration vector are located, it is based on the principle of trigonometric functions. The acceleration component of ...

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Abstract

The invention belongs to the technical field of inclination angle measurement based on an accelerometer, and in particular relates to an accelerometer zero offset correction method. In the two-axis horizontal inclination measurement, the inclination angle of the Y-axis is the placement angle of the X-axis, and the inclination angle of the X-axis is the placement angle of the Y-axis. The accelerometer is measured in advance on a precision vertical rotary table at a placement angle of 0°. From the actual data of the zero position offset every 1° between 90° and 90°, establish a measurement reference data table, and solidify the table in the main control program for online correction; in actual use, the placement angle of the X-direction accelerometer is determined by The Y accelerometer is measured, and then look up the table to obtain the measured value of the zero offset of the X-axis accelerometer in the state of this placement angle and correct it; the placement angle of the Y-direction accelerometer is measured by the X accelerometer, and then Look up the table to obtain the measured value of the zero offset of the Y-axis accelerometer in the state of this placement angle and correct it. The invention can realize the online correction of the zero offset of the accelerometer and improve the measurement accuracy of the inclination angle.

Description

technical field [0001] The invention belongs to the technical field of inclination measurement based on accelerometers, and in particular relates to an accelerometer zero offset correction method, which realizes online correction of the accelerometer zero offset and improves the inclination measurement accuracy thereof. Background technique [0002] There is no published patent on the correction method of the zero offset of the accelerometer. According to the search, at present, there are many methods for measuring the horizontal inclination angle through two orthogonally installed accelerometers sensitive to the gravitational acceleration. There are many articles and patents for research and explanation. This method is simple and practical, but the measurement error is relatively large. This is caused by the horizontal zero error caused by the zero offset of the accelerometer itself. Therefore, for the inclination measurement system based on the accelerometer, a key techno...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P21/00
CPCG01P21/00
Inventor 王锴磊沙春哲刘莎姜云翔
Owner BEIJING AEROSPACE INST FOR METROLOGY & MEASUREMENT TECH
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