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Method and device for measuring displacement by hall sensor

A Hall sensor and displacement technology, which is applied in the direction of measuring devices, electric devices, instruments, etc., can solve the problems of reducing the accuracy of measuring displacement of Hall sensors, and achieve the effects of reducing size, improving precision, and simple structure

Active Publication Date: 2019-04-19
SAIC MOTOR
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Problems solved by technology

[0004] However, this may lead to a reduction in the accuracy of the displacement measured by the Hall sensor

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  • Method and device for measuring displacement by hall sensor
  • Method and device for measuring displacement by hall sensor
  • Method and device for measuring displacement by hall sensor

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Embodiment Construction

[0035] In the prior art, the method of measuring the displacement by using the Hall sensor includes two methods of measuring the displacement according to the magnetic field strength and measuring the displacement according to the magnetic field angle. Wherein, the method for measuring the displacement according to the magnetic field strength includes using a Hall sensing element to judge the magnetic field strength in one direction. The displacement is measured according to the magnetic field angle, including using two Hall elements to measure the magnetic field strength in two directions to calculate the magnetic field angle. The method of measuring displacement according to the angle of the magnetic field has better accuracy than the method of measuring displacement according to the strength of the magnetic field.

[0036] However, in the case of mass production, the gap between the Hall sensor and the measured object has a large fluctuation range, and the fluctuation range...

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Abstract

The present invention provides a Hall sensor displacement measurement method and device. The method includes the following steps that: the magnetic field information of the current location of a measured object is measured, wherein the magnetic field information contains first magnetic field information and second magnetic field information; the displacement of the current location of the measured object with respect to a preset location is obtained according to the first magnetic field information; and the displacement of the current location of the measured object with respect to the preset location is corrected, so that the displacement of the current location of the measured object with respect to the preset location is obtained and is adopted as a measurement result. With the above method adopted, Hall sensor displacement measurement accuracy can be improved.

Description

technical field [0001] The invention relates to the technical field of Hall-type position measurement, in particular to a method and a device for measuring displacement by a Hall sensor. Background technique [0002] The Hall effect occurs when there is a magnetic field perpendicular to the current. The Hall effect is named after the American physicist Edwin Herbert Hall (1855-1938). In this case, the magnetic field produces a potential difference known as the Hall voltage in a direction perpendicular to both the direction of the magnetic field and the direction of the current flow. By measuring the Hall voltage, the magnitude of the magnetic field component can be determined. [0003] In the prior art, the Hall sensor can be used to measure the magnetic field angle, and then measure the displacement of the measured object. Because there is a gap between the Hall sensor and the measured object, this is a non-contact displacement measurement method. The size of the gap is d...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B7/02
Inventor 方伟荣潘宾李文涛瞿佳姜超
Owner SAIC MOTOR
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