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Zero calibration method and system for three-axis gyroscope

A zero-point calibration and gyroscope technology, applied in the field of sports navigation, can solve the problem that the zero-point deviation cannot be compensated, and achieve the effect of realizing accurate compensation and reducing production costs

Inactive Publication Date: 2019-01-11
上海仙软信息科技有限公司
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Problems solved by technology

[0004] The purpose of the embodiment of the present invention is to provide a zero point calibration method and system for a three-axis gyroscope, which is used to at least solve the zero point in the parallel gravity direction caused by the geomagnetic sensor in the inertial navigation equipment in the prior art being easily interfered by the external magnetic field Technical issues where deviations cannot be compensated

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Embodiment Construction

[0015] The specific implementation manners of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation manners described here are only used to illustrate and explain the embodiments of the present invention, and are not intended to limit the embodiments of the present invention.

[0016] Such as figure 1 As shown, the zero point calibration method of the three-axis gyroscope of an embodiment of the present invention includes:

[0017] S11. Obtain the rotation control amount of the three-axis gyroscope within a predetermined time period.

[0018] It can be understood that the rotation control amount may be the rotation control amount of the platform where the three-axis gyroscope is located; as an example, when the three-axis gyroscope is set in the inertial navigation device, the rotation control amount may be the inertial navigation device's control of th...

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Abstract

The invention relates to the technical field of motion navigation. One embodiment of the invention provides a zero calibration method and system for a three-axis gyroscope. The zero calibration methodfor the three-axis gyroscope comprises the following steps: obtaining the rotation control quantity relative to the three-axis gyroscope in a preset time period; determining a Z-axis angular velocitychange rate in a parallel gravity direction relative to the three-axis gyroscope in the preset time period; and compensating a zero offset in the parallel gravity direction based on the Z-axis angular velocity change rate and the rotation control quantity. Therefore, the zero offset in the parallel gravity direction is compensated by using the rotation control quantity and the Z-axis angular velocity change rate, the geomagnetic sensor in the traditional technology can be replaced, accurate compensation of the zero offset in the parallel gravity direction is realized, and the manufacturing cost of inertial navigation equipment is reduced.

Description

technical field [0001] The invention relates to the technical field of motion navigation, in particular to a zero point calibration method and system for a three-axis gyroscope. Background technique [0002] As an important part of the inertial sensor, the three-axis gyroscope is used to measure the three-axis angular velocity of the system to obtain the attitude of the system. Because the zero point deviation of the three-axis gyroscope will affect the angular velocity measurement value of the three-axis gyroscope. At the same time, with the accumulation of time, the small deviation of the angular velocity measurement will cause a large error in the integrated system attitude. Therefore, the three-axis gyroscope needs to perform zero compensation from time to time. [0003] At present, the zero point of the three-axis gyroscope is usually compensated and corrected by using the data of the three-axis geomagnetic sensor and the three-axis accelerometer. Specifically, the g...

Claims

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Application Information

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IPC IPC(8): G01C25/00
CPCG01C25/005
Inventor 黄强盛陈笑行王群戴萧何赵越
Owner 上海仙软信息科技有限公司
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