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Magnetic sensor and paper sheet identification device

A magnetic sensor and sensor technology, which is applied in the direction of instruments, banknote authenticity inspection, handling coins or valuable banknotes, etc., can solve problems such as banknote jamming, achieve the effects of preventing medium jamming, optimizing magnetic field distribution, and improving sensitivity

Active Publication Date: 2010-06-23
SANKYO SEIKI MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In addition, when using any of these methods to identify banknotes, if there is an opening on the sensor surface, there is a problem that the banknotes will be jammed.

Method used

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  • Magnetic sensor and paper sheet identification device
  • Magnetic sensor and paper sheet identification device
  • Magnetic sensor and paper sheet identification device

Examples

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Embodiment Construction

[0047] Hereinafter, a magnetic sensor to which the present invention is applied and a sheet identification device using the magnetic sensor will be described with reference to the drawings.

[0048] (overall composition)

[0049] figure 1 Shown is a structural diagram of the main part of the paper identification device to which the present invention is applied. exist figure 1 Among them, the paper identification device 1 of this form is a device for identifying the authenticity or type of a pattern formed on a paper sheet 2 (medium) such as a banknote or a check, and is formed on the paper sheet 2. The first pattern 21 is formed using a magnetic material such as magnetic ink, and the second pattern 22 is formed on the paper sheet 2 using a non-magnetic conductive material such as aluminum. The paper identification device 1 detects the authenticity or type of the paper 2 by detecting the first pattern 21 and the second pattern 22 formed on the paper 2 . Here, the second pat...

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PUM

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Abstract

A magnetic sensor (10) comprises a core body (11) having a sensor face (110) whereupon an air gap (16) is opened, and an exciting coil (12) arranged in the air gap (16). A nonmagnetic wear resistant member (18) exhibiting conductivity is arranged in the air gap (16) on the side closer to the sensor face (110) than the exciting coil (12). A sheet identifying device (1), which is provided with the magnetic sensor (10) arranged on a conveyance passage (3) for the sheet (2) and identifies the sheet (2) being conveyed on the conveyance passage (3) based on the detection results from the magnetic sensor (10), comprises a core body (11) equipped with a magneto-sensitive portion (118) directed toward the conveyance passage (3), and an exciting coil (12) wound around the core body (11) in order todetect a pattern for generating a magnetic field in the conveyance passage (3) when an AC current is supplied. The magnetic sensor detects a first pattern (21) formed on the sheet (2) by a magnetic material and a second pattern (22) formed on the sheet (2) by a nonmagnetic material based on the detection results of magnetic field variation caused when the sheet (2) is conveyed on the conveyance passage (3).

Description

technical field [0001] The present invention relates to a magnetic sensor and a paper identification device for identifying the authenticity and type of paper such as banknotes, checks and other valuable securities. Background technique [0002] In the past, the method adopted in identification devices such as banknotes is to use MR sensors (magnetoresistive sensors) and the like to detect patterns printed with magnetic ink on banknotes to identify authenticity and types of banknotes (for example, refer to Patent Document 1, Patent Document 2). [0003] In addition, when using any of these methods to identify banknotes, if there is an opening on the sensor surface, there is a problem of jamming the banknotes. Therefore, measures such as disposing a wear-resistant plate between the sensor surface and the banknote are taken (for example, refer to Patent Document 3). [0004] Patent Document 1: JP-A-2001-92915 [0005] Patent Document 2: JP-A-2003-35701 [0006] Patent Docu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G07D7/04G07D7/00G07D7/02G07D7/12
Inventor 百濑正吾
Owner SANKYO SEIKI MFG CO LTD
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