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Double-MEMS accelerometer-based online tilt angle measuring method

A technology of accelerometer and measurement method, applied in measurement device, measurement of inclination, mapping and navigation, etc., can solve the problems of complex error compensation, easy to be interfered by external environmental factors, etc.

Active Publication Date: 2019-05-31
HUNAN XINCHENG MACHINE +1
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Problems solved by technology

However, because the internal structure of the MEMS sensor is very small, it is very susceptible to interference from external environmental factors. Therefore, compared with the traditional inclinometer, the inclinometer composed of MEMS sensors needs more complex error compensation technology to filter the output data. To achieve high precision measurement

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  • Double-MEMS accelerometer-based online tilt angle measuring method
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  • Double-MEMS accelerometer-based online tilt angle measuring method

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Embodiment Construction

[0088] The present embodiment provides a kind of on-line inclination measurement method based on double MEMS accelerometer, is the method that adopts double MEMS accelerometer to determine roll angle and pitch angle to moving object, and double MEMS accelerometer is respectively called first MEMS accelerometer and The second MEMS accelerometer, this method is used to realize the accurate measurement of the inclination angle of the system. There are two sets of independent MEMS accelerometers in this inclination measurement method, and the effect of these two sets of accelerometers has the following two points: 1. Used for redundant backup, improve the robustness of the system, when any one set of accelerometers fails , the other set can still ensure the normal operation of the system; 2. When the two sets of accelerometer devices can work normally, the dual MEMS accelerometer inclination estimation method designed in this patent can be used to effectively fuse the outputs of th...

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Abstract

The invention discloses a double-MEMS accelerometer-based online tilt angle measuring method. According to the method, the three-axis zero offset error registers of a first MEMS accelerometer and a second MEMS accelerometer are established; the three-axis output of the two MEMS accelerometers at one moment of a moving object is obtained; whether the three-axis output of the two MEMS accelerometersat the moment is both in a stationary state is judged; and if the three-axis output of the two MEMS accelerometers at the moment is both in the stationary state, the object is considered to be in a stationary state, otherwise, the object is considered to be in a moving state. A double-MEMS accelerometer zero offset online estimation compensation algorithm is adopted to realize the online estimation and compensation of the zero offset of the MEMS accelerometers, and the problem of the accuracy decrease of tilt angle measurement caused by the zero offset variation of the MEMS accelerometers canbe solved, the accuracy of the tilt angle measurement is improved.

Description

technical field [0001] The invention relates to the technical field of measuring instruments, in particular to an online inclination measurement method based on dual MEMS accelerometers. Background technique [0002] Inclination measurement technology is often used for horizontal and vertical measurement of the system. By measuring the angle of the system's deviation from the horizontal position, it can reflect the degree of the measured object's deviation from the equilibrium position, and then provide control information for the braking control of the measured object. As a detection method, it has become a bridge erection, railway laying, civil engineering , Oil drilling, aviation and navigation, industrial automation, intelligent platform, machining and other fields are indispensable important measurement technology. With the development of the times, traditional inclinometers can no longer meet the requirements of some equipment for measurement accuracy and range, and t...

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Application Information

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IPC IPC(8): G01C9/00
Inventor 梁源徐兵
Owner HUNAN XINCHENG MACHINE
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