Method suitable for MEMS IMU repeated multiple calibrating

A technique of calibrating parameters and correction coefficients, which is applied in the testing/calibration of speed/acceleration/shock measuring equipment, measuring devices, instruments, etc., to avoid the risk of errors, reduce dependence, and improve reliability

Active Publication Date: 2012-07-04
BEIJING RES INST OF TELEMETRY +1
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Problems solved by technology

[0005] The technology of the present invention solves the problem: overcomes the deficiencies of the prior art, provides a MEMS IMU multiple calibration method with higher reliability and efficiency, solves the problem of needing to modify the embedded software before performin

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  • Method suitable for MEMS IMU repeated multiple calibrating
  • Method suitable for MEMS IMU repeated multiple calibrating
  • Method suitable for MEMS IMU repeated multiple calibrating

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Embodiment Construction

[0029] The method applicable to multiple calibrations of MEMS IMUs is used for repeated and multiple calibrations of MEMS IMUs, and its purpose is to repeatedly calibrate MEMS IMUs reliably and efficiently. The characteristics of the present invention are: 1. The MEMS IMU can be repeatedly calibrated to calculate the correction coefficient of the calibration parameter without changing the software; 2. The MEMS IMU is controlled to upgrade the correction coefficient according to external instructions, and the external bus The interface of input and output data is common to the interface of MEMS IMU to realize its normal functions, which is simple and convenient, and is suitable for repeated calibration and coefficient upgrade of batch MEMS IMU products. 3. If there is any problem during the coefficient upgrade process of MEMSIMU, the upgrade will stop. The upgrade process can be restarted after the MEMS IMU is powered on and reset.

[0030] Such as figure 1 Shown, be applicab...

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Abstract

A method suitable for MEMS IMU repeated multiple calibrating includes the following steps: (1) updating an original correction factor: namely resetting the MEMUS IMUS to the factory defaults; (2) repeatedly calibrating MEMS IMU, namely recalibrating a gyro and an accelerometer respectively; (3) obtaining a new correction factor, namely calculating a new factor for correcting the calibrated factors of the gyro and the accelerometer, and writing the new factor in a binary file; (4) updating the new correction factor: namely writing the binary file of the new factor included in an MEMS IMU updating in the flash memory; (5) and reading the new correction factor in the flash memory and correcting the calibrated parameters, so as to obtain more correct angle speed and acceleration output after the MEMS IMU is electrified. The method solves the problem of the conventional method that the embedded software needs to be corrected before repeated calibrating, reduces the dependence on the software, is simple and convenient, and is suitable for the repeated calibration of the batch MEMS IMU product.

Description

technical field [0001] The invention relates to a method suitable for repeated calibration of MEMS IMU, in particular to a method for repeated calibration of MEMS IMU without changing software. Background technique [0002] As an inertial measurement device integrated with microsensors (micromechanical gyroscopes and accelerometers), microactuators (single-chip microcomputers or DSPs) and circuits, MEMS IMUs can provide real-time angular velocity and linear acceleration of carriers. Currently, they are used in tactical weapons, automobiles, It has been widely used in industrial control and other fields. [0003] The MEMS IMU collects the electrical signals of microsensors (micro-mechanical gyroscopes and accelerometers) through the acquisition circuit, and then converts the electrical signals into angular velocity and acceleration units for output through scaling factor conversion. The parameters required for scaling factor conversion have been calculated and stored in flas...

Claims

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Application Information

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IPC IPC(8): G01C25/00G01P21/00
Inventor 唐珊珊汪守利刘海涛王磊
Owner BEIJING RES INST OF TELEMETRY
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