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Vehicle collision detection method based on non-horizontal installation of mems sensors

A vehicle collision and detection method technology, applied in the field of collision detection, can solve problems such as inability to ensure complete horizontal installation

Active Publication Date: 2017-06-13
DALIAN ROILAND SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to realize the detection of vehicle collisions, OBD vehicle equipment is generally used, which includes MEMS accelerometers and gyroscopes. horizontal installation

Method used

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  • Vehicle collision detection method based on non-horizontal installation of mems sensors
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  • Vehicle collision detection method based on non-horizontal installation of mems sensors

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Experimental program
Comparison scheme
Effect test

Embodiment

[0041] A kind of vehicle collision detection method based on MEMS sensor non-horizontal installation, comprises the steps:

[0042] S1. Install the MEMS sensor on the vehicle, and calculate the installation attitude angle;

[0043] The installation attitude angle calculation steps are as follows:

[0044] (1) Calculation error compensation

[0045] Make N a =(N ax ,N ay ,N az ) T ,but

[0046]

[0047] Where Na is the output of the original speed increment semaphore of the three axes of the accelerometer, N ax ,N ay ,N az are the speed increments in the forward direction, lateral direction and vertical direction of the vehicle, respectively, is the nominal value of the accelerometer;

[0048] (2) Calculate the specific force increment δw after error compensation b :

[0049]

[0050] δT is the system sampling time interval, k 0 is the zero bias of each axis of the accelerometer, and Ea is the installation error matrix of the accelerometer;

[0051] (3) ...

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Abstract

The invention discloses a vehicle collision detection method based on the non-horizontal installation of an MEMS (Micro Electro Mechanical Systems) sensor. The method comprises the following steps: S1, installing an MEMS sensor on a vehicle, and calculating an installation attitude angle; S2, decomposing the output of an accelerator of the MEMS into the velocity increment of a vehicle forward direction, a vehicle transverse direction and a vehicle upward direction according to the installation attitude angle; S3, converting the decomposed velocity increment into an acceleration; S4, carrying out collision detection to the vehicle forward direction and / or the transverse direction. According to the detection method provided by the invention, the effective detection on the vehicle collision can be realized.

Description

technical field [0001] The invention relates to a collision detection method, in particular to a vehicle collision detection method based on non-horizontal installation of MEMS sensors. Background technique [0002] With the increasing number of vehicles, traffic accidents are also more and more frequent, so timely and effective detection of vehicle collisions can effectively reduce the casualties of traffic accidents. In order to realize the detection of vehicle collisions, OBD vehicle equipment is generally used, which includes MEMS accelerometers and gyroscopes. Install horizontally. Contents of the invention [0003] In order to solve the above technical problems, the present invention provides a vehicle collision detection method based on non-horizontal installation of MEMS sensors, which can realize effective detection of vehicle collisions. The technical scheme of the present invention is: a kind of vehicle collision detection method based on MEMS sensor non-horiz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M17/007
Inventor 田雨农张晓伟苍柏李刚
Owner DALIAN ROILAND SCI & TECH CO LTD
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