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A magnetic image sensor and an authentic identification method

An image sensor and magnetic sensor technology, applied in the field of magnetic sensors, can solve the problems of poor stability and reliability, slow response, low sensitivity of coil-type magnetic sensors, etc., and achieve the effect of accurate identification and comprehensive identification

Inactive Publication Date: 2014-03-12
BEIJING JIAYUE TONGLEJI ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In addition, the coil-type magnetic sensor also has defects such as low sensitivity, slow response, low resolution, poor stability and reliability, which makes the existing financial authentication machines more and more unable to meet the development needs of the financial industry.

Method used

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  • A magnetic image sensor and an authentic identification method
  • A magnetic image sensor and an authentic identification method
  • A magnetic image sensor and an authentic identification method

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Embodiment Construction

[0055] In order to enable those skilled in the art to better understand the technical solution of the present invention, the magnetic image sensor and the counterfeiting method provided by the present invention will be described in detail below with reference to the accompanying drawings.

[0056] The magnetic image sensor provided by the present invention includes a magnetic sensor chip, and the magnetic sensor chip includes a first magnetically sensitive unit lattice and a second magnetically sensitive unit lattice, and the space between the first magnetically sensitive unit lattice and the second magnetically sensitive unit lattice The included angle θ is 0<θ<180°, the first magnetically sensitive unit lattice and the second magnetically sensitive unit lattice respectively include N and M magnetically sensitive units, and the magnetically sensitive units are made of magnetically sensitive films. Stone bridge circuit, wherein N and M are integers ≥ 1.

[0057] The magnetic i...

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Abstract

The invention provides a magnetic image sensor and an authentic identification method. The magnetic image sensor comprises a magnetic sensor chip. The characteristics are that: the magnetic sensor chip comprises a first magnetic sensitive dot matrix and a second magnetic sensitive unit dot matrix; an included angle theta between the first magnetic sensitive dot matrix and the second magnetic sensitive unit dot matrix is in the range of 0<theta<180 degrees; the first magnetic sensitive dot matrix and the second magnetic sensitive unit dot matrix respectively comprise N magnetic sensitive units and M magnetic sensitive units; and the magnetic sensitive units are Wheatstone bridge circuits made of magnetic sensitive films, wherein the N and the M are integers greater or equal to 1. The magnetic image sensor can carry out magnetic imaging on magnetic stripes or magnetic dots in a two dimensional plane, so that demands for two dimension authentic identification can be realized.

Description

technical field [0001] The invention belongs to the technical field of magnetic sensors, and in particular relates to a magnetic image sensor of a counterfeit authentication mechanism and a manufacturing method thereof. Background technique [0002] The sensitive unit in the magnetic sensor is sensitive to magnetic changes caused by changes in magnetic field, current, stress and strain, temperature, light, etc., that is, magnetic changes will cause changes in the magnetic properties of the sensitive unit. The change of the magnetic properties of the sensitive unit is converted into an electrical signal, and the value of the physical quantity corresponding to the geomagnetic field, current, stress and strain, temperature or light can be obtained by measuring the electrical signal. The magnetic properties of the sensitive unit will change due to slight magnetic changes. Therefore, magnetic sensors are widely used in high-precision fields such as aviation, aerospace, microelec...

Claims

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Application Information

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IPC IPC(8): G07D7/20G07D7/04
Inventor 时启猛彭春雷曲炳郡
Owner BEIJING JIAYUE TONGLEJI ELECTRONICS
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