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Angle sensor for automobile steering wheel

A steering wheel and sensor technology, which is applied in the direction of instruments, measuring devices, and electrical devices, can solve the problems of low precision, pollution, and short life, and achieve the effects of accurate signal collection, guaranteed work reliability, and long service life

Inactive Publication Date: 2012-06-20
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem is that the potentiometer angle sensor has contacts, wear and tear, short life and low precision
Hall angle sensor has low precision and poor sensitivity
The optocoupler has high precision, but the cost is high, and there are pollution problems
These problems restrict the improvement of the performance of the angle sensor

Method used

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  • Angle sensor for automobile steering wheel
  • Angle sensor for automobile steering wheel
  • Angle sensor for automobile steering wheel

Examples

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the examples, but not limited to the content described below.

[0021] The automobile steering wheel angle sensor based on the radially magnetized magnetic film provided by the invention has a structure such as figure 1 As shown, it includes the main gear 1 driven by the main rotating shaft of the automobile steering wheel, the main gear 1 meshing with the large gear 3 and the pinion 2, the giant magnetoresistive sensing chip on the circuit board 6, and the microprocessor. Wherein, the first giant magnetoresistance sensing chip 7 is facing the surface of the bull gear, and the second giant magnetoresistance sensing chip 8 is facing the corresponding surface of the pinion gear.

[0022] The microprocessor is respectively connected with the first giant magnetoresistance sensing chip and the second giant magnetoresistance sensing chip through the SPI port.

[0023] Both the bull gear and the pinion ...

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Abstract

The invention provides a rotation angle sensor for an automobile steering wheel, particularly an angle sensor for the automobile steering wheel based on a radially magnetized thin film. The angle sensor comprises a master gear (1) driven by a master rotating shaft of the automobile steering wheel, a pinion (2) and a bull wheel (3) which are engaged with the master gear (1) and made of ceramic materials, two giant magnetic resistance induction chips arranged on a circuit board (6), and a micro processor, wherein the two giant magnetic resistance induction chips face towards the surfaces of the bull wheel and the pinion respectively, and are connected with the micro processor through serial peripheral interfaces (SPI); and the bull wheel and the pinion are made of the ceramic materials, and are coated with high-magnetism medium thin films. The bull wheel and the pinion made of the ceramic materials have high anti-abrasion performance, high-temperature resistance, high anti-corrosion performance and high reliability, can be relatively thin, are easy to mount and fix, and can be produced in a large batch; furthermore, a magnetic thin film medium has the advantages of small volume, high magnetic intensity, high magnetic field directivity, simple design, high reliability and the like.

Description

technical field [0001] The invention relates to the technical field of automobile electronic detection, in particular to an automobile steering wheel rotation angle sensor. Background technique [0002] Angle sensors are commonly used sensors in automobiles and diesel vehicles. There are many types of angle sensors currently in use, including potentiometer-type angle sensors, Hall-type non-contact angle sensors, and photoelectric coupling angle sensors. The existing problems are: the potentiometer type angle sensor has contacts, wears out, has short service life and low precision. The Hall-type angle sensor has low precision and poor sensitivity. The photoelectric coupling type has high precision, but the cost is high, and there are pollution problems. These problems restrict the improvement of the performance of the angle sensor. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide an automobile steering wheel an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/30
Inventor 杨胜兵徐锋
Owner WUHAN UNIV OF TECH
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