Control gate

A technology for controlling doors and channels, applied in the field of control doors, can solve the problems of low alternating magnetic field, increased time and cost, etc., and achieve the effects of reducing obstacles, improving work efficiency, and compact structure

Inactive Publication Date: 2009-03-25
FUJIFILM BUSINESS INNOVATION CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in some cases this measure cannot reduce the above-mentioned influence of the alternating magnetic field to a sufficiently low level
[0008] Also, if the excitation coil and the detection coil are housed in the same housing case, time and cost for installation work will increase, and a large space will be required for installation due to an increase in weight and size.

Method used

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Embodiment Construction

[0029] Now, various exemplary embodiments of the invention related to the present application will be described with reference to the accompanying drawings. Such as figure 1 The control gate shown is a gate for detecting confidential documents contained in carry-ons, and by installing this control gate at the entrance or exit of an area where secrecy must be ensured, it is possible to prevent confidential documents from being taken out or taken out illegally or by mistake enter.

[0030] In areas where confidentiality must be ensured, confidential matters are stored in the form of documents or electronic data, and documents are produced using printers or copiers. In this case, confidential documents are produced using paper containing a magnetic substance that produces the large Barkhausen effect. The paper may be such that the magnetic substances producing the large Barkhausen effect are embedded in the entire paper in a randomly dispersed manner and are not easily removed....

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PUM

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Abstract

A control gate, including an exciting coil and a detecting coil, is disclosed. The exciting coil forms an alternating magnetic field in a passageway at an entrance to or an exit from an area where taking out or bringing in of an object is controlled. The detecting coil detects a change of the magnetic field when magnetic substance contained in the object generating a large Barkhausen effect causes magnetic inversion in the alternating magnetic field. The exciting coil is provided above the passageway and has a winding wire wound along a horizontal plane. The detecting coil is provided in a side part of the passageway and has a winding wire wound along a vertical plane which is parallel to a passing direction of the passageway.

Description

technical field [0001] The present invention relates to a control gate that controls carried items that are prohibited from being taken out or brought into a specific area by detecting a change in a magnetic field due to magnetization reversal of a magnetic substance that produces a large Barkhausen effect. Background technique [0002] As a control gate for detecting the passage of a carry-on that is prohibited from being taken out or brought in and issuing an alarm, there is known a control gate using a magnetic substance that produces a large Barkhausen effect. [0003] For example, Patent Document 1 (JP-A-2003-182847) discloses a control gate in which a magnetic substance is added in advance to an object controlled to be taken out or brought into a controlled area, and when entering or leaving the The passage of the magnetic substance is detected in the channel of the control area, thereby controlling the carried objects. [0004] When a magnetic field larger than the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E05F15/20G01V3/10
CPCE05G5/003
Inventor 高桥邦广马里奥·福斯松田司山口昭治黄田保宪井上浩良
Owner FUJIFILM BUSINESS INNOVATION CORP
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