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magnetic sensor

A magnetic sensor and magnetic modulation technology, applied in the micro-nano field, to achieve the effect of shielding external magnetic fields, improving sensitivity and reducing influence

Inactive Publication Date: 2018-11-02
BEIJING JIAYUE TONGLEJI ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a magnetic sensor with high sensitivity and strong anti-noise ability for the above-mentioned defects in the magnetic sensor, and can also improve the consistency between multiple channels

Method used

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Embodiment Construction

[0022] In order to enable those skilled in the art to better understand the technical solution of the present invention, the magnetic sensor provided by the present invention will be described in detail below with reference to the accompanying drawings.

[0023] Such as figure 1 with figure 2 As shown, the magnetic sensor includes a housing 1 , a magnetic chip 2 , a permanent magnet 3 , a circuit board 4 , a first magnetic modulation component 5 , a second magnetic modulation component 6 and a welding pin 7 . The magnetic chip 2, the permanent magnet 3, the circuit board 4, the first magnetic modulation component 5 and the second magnetic modulation component 6 are fixed in the housing 1, the magnetic chip 2 is placed in the first accommodation space 52 of the first magnetic modulation component 5, the second A magnetic modulation component 5 is placed between the magnetic chip 2 and the permanent magnet 3, the magnetic chip 2, the permanent magnet 3 and the first magnetic m...

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Abstract

The invention provides a magnetic sensor which comprises a magnetic chip, a permanent magnet, a circuit board and welding pins, and further comprises a first magnetic modulation part and a second magnetic modulation part, wherein a first accommodating space is formed in the first magnetic modulation part, and the magnetic chip is arranged in the first accommodating space; a second accommodating space is formed in the second magnetic modulation part, the magnetic chip, the permanent magnet and the first magnetic modulation part are arranged in the second accommodating space, and the first magnetic modulation part is positioned between the magnetic chip and the permanent magnet; the circuit board is used for correspondingly and electrically connecting the input and output ends of the magnetic chip with the welding pins. The magnetic sensor is high in sensitivity, good in noise resistance and good in multi-channel consistency.

Description

technical field [0001] The invention belongs to the field of micro-nano technology, and in particular relates to a magnetic sensor. Background technique [0002] In order to improve the anti-counterfeiting ability, not only strong magnetic marks but also weak magnetic marks are set in the medium. Correspondingly, the magnetic sensor should not only detect the strong magnetic mark in the medium, but also detect the weak magnetic mark in the medium. However, the magnetic field of the weak magnetic signal itself cannot be sensed by the magnetic sensor, but it can generate a magnetic field induced by the magnetic sensor after being pre-magnetized. [0003] Therefore, a permanent magnet is set in the magnetic sensor, and the permanent magnet can make the weak magnetic marker obtain instantaneous magnetism and be sensed by the magnetic sensor. In practical applications, the permanent magnet reduces the sensitivity of the magnetic sensor while pre-magnetizing the weak magnetic ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G07D7/04G01R33/07G01R33/09
Inventor 姚明高时启猛刘乐杰
Owner BEIJING JIAYUE TONGLEJI ELECTRONICS
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