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Giant magnetoresistance (GMR) currency detection magnetic head of ATM (Automatic Teller Machine) and manufacture method

A technology of giant magnetoresistance and ATM machine, which is applied in the field of banknote verification module, can solve problems that are not involved, and achieve the effect of high resolution

Inactive Publication Date: 2010-11-17
SHENZHEN YIHUA COMP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

None of the above-mentioned documents involve the giant magnetoresistive (GMR) magnetic head dedicated to ATM machines, the overall seamless detection of the effective detection range of the single chip of the magnetic head is less than 10mm, and the detection of banknotes of different denominations.

Method used

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  • Giant magnetoresistance (GMR) currency detection magnetic head of ATM (Automatic Teller Machine) and manufacture method
  • Giant magnetoresistance (GMR) currency detection magnetic head of ATM (Automatic Teller Machine) and manufacture method
  • Giant magnetoresistance (GMR) currency detection magnetic head of ATM (Automatic Teller Machine) and manufacture method

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Experimental program
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Embodiment Construction

[0050] The present invention will be further described below in conjunction with accompanying drawing:

[0051] The invention can realize a single magnetic head to detect the metal wire and the magnetic ink of the banknote based on the suitable material and structure and the method of adding a bias magnet.

[0052] Magnetic head design scheme: first make a discrete magnetic head with an effective detection width of 3mm, and then do the overall design after testing.

[0053] Such as image 3 As shown, adding a bias magnetization of about 60Oe to the chip can detect very small changes in magnetic signals. A single magnetoresistance can be detected, and it is matched with the same magnetoresistance in order to improve the anti-interference ability.

[0054] Such as Figure 4 As shown, make the structure after detecting the magnetic head. Lead wires: Ultrasonic pressure welding technology is used to bind the lead wires to the pads on the film 9 first, and then solder the lead ...

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Abstract

The invention relates to a giant magnetoresistance (GRM) currency detection magnetic head of an ATM (Automatic Teller Machine) and a manufacture method. The magnetic head comprises a magnetic head shell, a chip framework, GMR chips, a magnet, a PCB (Printed Circuit Board) and a cover plate, wherein GMR chip installation ports are mutually staggered and arranged without seams in a triangle shape, and an effective single-chip detection range is 3mm. The method comprises the following steps of: manufacturing the GMR chips; placing the GMR chips on the framework without seams; welding the GMR chips on the PCB in the framework; adding the bias magnet; covering the magnetic head cover plate; testing; fixing the magnetic head cover plate; pouring glue; and finally carrying out master testing.

Description

technical field [0001] The invention relates to a banknote checking module of an ATM machine, and mainly refers to a giant magnetoresistance (GMR) banknote checking magnetic head of the banknote checking module of an ATM machine whose single-chip effective detection range of a magnetic head is 3mm and a manufacturing method thereof. Background technique [0002] Related literature: CN200520095968.3 discloses a giant magnetoresistance sensor of a currency counter, which uses a giant magnetoresistance (GMR) sensor chip as the sensing chip for detection. Its structure is composed of shell, GMR chip, magnetic steel, core frame and terminal. The GMR chip, PCB board and magnetic steel are installed in the shell through the core frame from top to bottom. When the magnetic field lines generated by the magnetic steel pass through the giant magnetoresistance sensor chip, they are parallel to the direction of the giant magnetoresistance wiring on the chip surface. In this way, the mag...

Claims

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Application Information

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IPC IPC(8): G07D7/00G07D7/04
Inventor 邓迪文
Owner SHENZHEN YIHUA COMP
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