A linear magnetoresistive position sensor

Abstract

The invention discloses a linear magnetoresistive position sensor, comprising: a magnetoresistance element array, an ADC analog-to-digital conversion circuit, an FPGA numerical processing circuit, a serial port communication circuit and a magnetic board; wherein, the magnetoresistance element array is used for collecting space In the analog signal that reflects the change of resistance value at different positions; the change of the magnetic field angle at different positions correspondingly causes the change of resistance value; Converted to a magnetic resistance digital signal; the FPGA numerical processing circuit is used to analyze and process the collected magnetic resistance digital signal to obtain a processing result; the serial communication circuit is used to output the processing result; the magnetic The plate is composed of a plurality of pairs of magnets arranged and installed as the excitation magnetic field detected by the linear magnetoresistive position sensor.

Description

technical field [0001] The invention relates to electronic technology, in particular to a linear magnetoresistive position sensor. Background technique [0002] The existing position linear position sensor technology mainly uses a magnetic scale, which is composed of a magnetic strip and a reading head, and the reading head needs to be installed on the moving mechanism to read the position data. [0003] The magnetic scale uses a method similar to the recording technology. The process of recording magnetic waves with strictly equal intervals on the magnetic ruler (or disk) through the recording head is called magnetic recording. A magnetic ruler that has recorded magnetic waves is called a magnetic grating ruler. The distance between adjacent grating waves on the magnetic grating is called the wavelength of the magnetic grating, and the wavelength is the length measurement unit of the magnetic grating, which is determined by collecting the number and wavelength of the magne...

AI Technical Summary

Problems solved by technology

[0004] The reading head of the existing magnetic scale is installed on the movement mechanism, and the data line of the reading head needs to move with the movement mechanism. When the speed is relatively fast or long-distance operation is required, the data line is easy to break and the life is relatively short; If you need to do a circular motion, the wire will get tangled and it won't work

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