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Accelerometer fault diagnosing and detecting method

A technology of accelerometer and detection method, applied in speed/acceleration/shock measurement, test/calibration of speed/acceleration/shock measurement equipment, measurement device, etc., which can solve the problems of low efficiency and high cost

Active Publication Date: 2017-08-29
SUZHOU NOVOSENSE MICROELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is inefficient and expensive

Method used

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  • Accelerometer fault diagnosing and detecting method

Examples

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Effect test

Embodiment 1

[0027] A method for error diagnosis and detection of an accelerometer in a three-dimensional space, the specific steps of which are as follows:

[0028] (1): Use the center of the regular tetrahedron and each end point to form a non-orthogonal four-axis (a, b, c, d); use the center of gravity as the starting point to obtain the vector data of a, b, c, and d;

[0029] (2): Taking a as a benchmark, perform vector decomposition on b, c, and d, and obtain the vector value on the straight line where the axis a is located;

[0030] (3): Calculate the vector sum of b, c, and d in the direction of axis a, and compare it with the actual measurement a;

[0031] (4): If it matches, the result is feasible, if it does not match, the result is not credible;

[0032] (5): A series of consecutive data results are unreliable, that is, the diagnosis and detection device fails, an error indication is issued, and the system is prompted to replace or scrap the device.

Embodiment 2

[0034] A method for error diagnosis and detection of an accelerometer in a three-dimensional space, the specific steps of which are as follows:

[0035] (1): Use a cube to connect three sides and a pair of fixed points to form a local non-orthogonal four-axis (x, y, z, k); take the pair of fixed points as the starting point to obtain the vector data of (x, y, z, k);

[0036] (2): With k as a benchmark, vector decomposition is performed on x, y, and z to obtain the vector value on the straight line where the axis k is located;

[0037] (3): Calculate the vector sum of x, y, z in the direction of axis k, and compare it with the actual measurement k;

[0038] (4): If it matches, the result is feasible, if it does not match, the result is not credible;

[0039] (5): A series of consecutive data results are unreliable, that is, the diagnosis and detection device fails, an error indication is issued, and the system is prompted to replace or scrap the device.

Embodiment 3

[0041] A method for error diagnosis and detection of an accelerometer in a two-dimensional space, the specific steps of which are as follows:

[0042] (1): Use the non-orthogonal three axes (a, b, c) formed by the center of the equilateral triangle and each end point to obtain the vector data of a, b, and c;

[0043] (2): Taking a as a benchmark, perform vector decomposition on b and c, and obtain the vector value on the straight line where the axis a is located;

[0044] (3): Calculate the vector sum of b and c in the direction of axis a, and compare it with the actual measurement of a;

[0045] (4): If it matches, the result is feasible, if it does not match, the result is not credible;

[0046] (5): A series of consecutive data results are unreliable, that is, the diagnosis and detection device fails, an error indication is issued, and the system is prompted to replace or scrap the device.

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Abstract

The invention proposes an accelerometer fault diagnosing and detecting method, which utilizes the redundant information between non-orthogonal axes (completely orthogonal ones or partially orthogonal ones) to realize the real-time automatic detection to the invalid axis in the accelerometer and to report the self-diagnosing and detecting processing method for the diagnosing information, achieving the purposes of ensuring data credibility, increase in detection efficiency and decrease in cost.

Description

technical field [0001] The invention relates to the detection field, in particular to an error diagnosis detection method for an accelerometer. Background technique [0002] In applications with high reliability requirements, error diagnosis detection is an essential link, especially for applications with high safety requirements, each sensor readout data must be tested for error diagnosis to confirm the reliability of the data . Existing accelerometers use a traditional orthogonal coordinate system, and the sensing data of axes in different directions are independent, so it is difficult to mutually verify the credibility of the data. Therefore, the prior art relies on the simultaneous use of data between multiple devices for mutual verification and confirmation of data credibility. This method is inefficient and expensive. Contents of the invention [0003] In order to solve the above-mentioned technical problems, the present invention proposes an error diagnosis and d...

Claims

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Application Information

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IPC IPC(8): G01P21/00G01P21/02
CPCG01P21/00G01P21/02
Inventor 赵佳盛云高洪连
Owner SUZHOU NOVOSENSE MICROELECTRONICS
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