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Method and device for measuring steering wheel rotation angle

A technology of rotation angle and measurement method, applied in the direction of measurement device, electric device, transportation and packaging, etc., can solve the problem of high precision requirements of structural parts, and achieve the effect of increasing difficulty and cost

Inactive Publication Date: 2013-10-23
BYD CO LTD
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a method and device for measuring the steering wheel rotation angle in order to solve the technical problem that the existing measuring method and device require high precision for structural parts

Method used

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  • Method and device for measuring steering wheel rotation angle
  • Method and device for measuring steering wheel rotation angle
  • Method and device for measuring steering wheel rotation angle

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Embodiment Construction

[0034] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0035] like figure 1 Shown, a kind of measuring method of steering wheel rotation angle comprises the following steps:

[0036] Step 1: Obtain the rotation angle α of the first driven gear B and the rotation angle β of the second driven gear C respectively.

[0037] Specifically, the first GMR sensor is used to obtain the rotation angle α of the first driven gear B, and the second GMR sensor is used to obtain the rotation angle β of the second driven gear C. The driving gear A will drive the first driven gear B and the second driven gear C with magnets fixed in the cen...

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Abstract

The invention provides a method for measuring steering wheel rotation angle. The method includes: step 1: respectively acquiring rotation angle alpha of a first driven gear and rotation angle beta of a second driven gear; step 2: acquiring a difference omega through the rotation angle alpha of the first driven gear minus the rotation angle beta of the second driven gear; step 3: correcting the difference Omega; step 4: acquiring an absolute angle theta by calculating the corrected difference Omega, number of gears L , M and N of the driving gear, the second driven gear and the first driven gear, and determining the absolute angle theta as the rotation angle of the steering wheel. The invention further provides a corresponding device for measuring steering wheel rotation angle. With the method and device for measuring steering wheel rotation angle, the absolute angle theta of the steering wheel rotation in multiple circles can be measured accurately.

Description

technical field [0001] The invention relates to a method and a device for measuring the rotation angle of a steering wheel. Background technique [0002] With the gradual improvement of consumers' requirements for automobile safety performance and driving comfort, it is an inevitable trend for the development of automobile safety systems to develop safer and more comfortable safety control systems. Active safety systems have also entered the fast lane of development and popularization. European and American laws and regulations have clearly stipulated that vehicles must be equipped with body stabilization systems. Active safety systems such as electronic stability program (Electronic Stability Program, ESP for short), Adaptive Front-Lighting System (AFS for short), anti-fatigue system, and auxiliary reversing system all use steering wheel angle sensors. Therefore, the accurate steering wheel rotation angle output directly affects the judgment of the driver's driving intenti...

Claims

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Application Information

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IPC IPC(8): B62D15/02G01B7/30
Inventor 蔺新轲梁荣生王永攀
Owner BYD CO LTD
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