MAGNETO RESISTANCE SENSOR FOR IDENTIFYING MAGNETIC IMAGE

摘要

A magneto resistance sensor for identifying a magnetic image comprises a PCB (1) and multiple magneto resistance sensor chips (2). The multiple magneto resistance sensor chips (2) are located on the PCB (1) and the PCB (1) is perpendicular/parallel to a magnetic image detection surface (3). A side surface detection mode and a front surface detection mode are provided. In the side surface detection mode, side surfaces (2(1)) of the multiple magneto resistance sensor chips (2) are in parallel to or share surfaces with a side surface (1(1)) of the PCB (1), and are in parallel to the magnetic image detection surface (3). The multiple magneto resistance sensor chips (2) are provided with the same magnetic field sensitivity direction (7). In the side surface detection mode, a manner of arranging adjacent magneto resistance sensor chips (2) in a stack is used. In the front surface detection mode, a manner of alternatively arranging the adjacent magneto resistance sensor chips (2) is used to implement continuity of detection areas on the magnetic image detection surface (3). The magneto resistance sensor for identifying a magnetic image may also comprise a permanent magnet assembly (5) and a housing (6). The sensor has advantages of identification area continuity, signal completion, high sensitivity and low power consumption.