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Median filtering method and device for calibrating accelerometer

An accelerometer and median technology, applied in the field of inertial navigation, can solve problems such as inaccurate parameters and interference, achieve precise output and improve accuracy

Inactive Publication Date: 2018-11-16
HENGYANG ZHIGU TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Embodiments of the present invention provide a median filtering method and device for accelerometer calibration to solve the problem that the pulse signal interferes with other effective static signals, resulting in inaccurate calibrated parameters

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  • Median filtering method and device for calibrating accelerometer
  • Median filtering method and device for calibrating accelerometer

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Embodiment Construction

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0044] see figure 1 , figure 1 is a flow chart of a median filtering method for accelerometer calibration provided by an embodiment of the present invention, such as figure 1 shown, including the following steps:

[0045] Step 101, acquiring static data detected by the accelerometer.

[0046] In this embodiment, when the accelerometer is being tested, the static test data of the accelerometer is obtained, which is the above static data, and the stat...

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Abstract

The invention provides a median filtering method and device for calibrating an accelerometer, and the method comprises the steps: obtaining static data detected by the accelerometer; determining a threshold value according to the static data; recognizing a pulse signal in the static data according to the threshold value; and determining an output quantity of a measurement specific force of the accelerometer after the deleting of the pulse signal or the replacing of the pulse signal. The method improves the accuracy of the parameters of the calibrated accelerometer.

Description

technical field [0001] The invention relates to the technical field of inertial navigation, in particular to a median filtering method and device for accelerometer calibration. Background technique [0002] The accelerometer is an instrument for measuring and speed. In order to know the spatial position of each instantaneous aircraft, rocket and ship, its acceleration can be continuously measured through inertial navigation. After two integrations, the position coordinate signal in one direction is obtained, and the three coordinates The instrumental measurements of orientation synthesize the motion profile and give the spatial position of the vehicle at each instant. Therefore, it is very important to calibrate the high-precision zero bias and scale factor of the accelerometer for the navigation calculation. At present, when calibrating the accelerometer, the linear filtering method is used, that is, the calculation is performed once every second, and the arithmetic mean v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P21/00G01C25/00
CPCG01C25/00G01P21/00
Inventor 张春熹王心卢鑫冉龙俊
Owner HENGYANG ZHIGU TECH DEV CO LTD