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Metal detection sensor

A metal detection and sensor technology, used in instruments, measuring devices, scientific instruments, etc., can solve problems such as abnormal detection data, false positives, and vehicle missed reports.

Inactive Publication Date: 2014-02-05
OPTEX CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] When this vehicle detection sensor is newly installed or added, the signal from the signal transmission coil is transmitted through the iron plate buried in the bottom of the parking lot, for example, and causes mutual interference between the signals of the same resonance frequency installed in adjacent parking spaces, and as a result In order to detect that the data has become abnormal, in some cases, there are false positives and false positives for the existence of vehicles

Method used

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Embodiment Construction

[0032] Hereinafter, embodiments of the present invention will be described with reference to the drawings. figure 1 It is a plan view showing a vehicle detection sensor 1 as a metal detection sensor according to an embodiment of the present invention. figure 2 It is a configuration diagram showing a state in which a vehicle locking device using a vehicle detection sensor 1 is installed in a plurality of parallel parking spaces S in, for example, a toll parking lot.

[0033] Such as figure 2 When each vehicle detection sensor 1 detects the vehicle M, it outputs a lock unlock signal to the drive unit 31 to raise the lock plate (lock plate) 32 to lock the vehicle M. When the parking fee has been paid, a lock-off signal is output to the driving unit 31, and the lock plate (lock plate) 32 is lowered to unlock the vehicle M.

[0034] Such as figure 1 , the vehicle detection sensor 1 is housed in a solid casing as a whole, and includes: a signal transmitting coil (TX) 2, that is...

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Abstract

A metal detection sensor (1) stores, by a frequency set storage means (8), a plurality of frequency sets, each frequency set comprising a detection frequency and an interference confirmation frequency, sequentially performs interference searches at the interference confirmation frequency of the frequency set by a mutual interference search means (9), and, when no mutual interference occurs, sets, as the detection frequency of the frequency set, the resonance frequency of an electromagnetic resonance circuit (2) for detecting the presence or absence of a metal body (M) such as a vehicle by a resonance frequency setting means (10).

Description

[0001] related application [0002] This application claims the priority of Japanese Patent Application No. 2011-144344 for which it applied in Japan on June 29, 2011, and makes the whole content a part of this application by reference. technical field [0003] The present invention relates to a metal detection sensor that uses an electromagnetic resonance circuit that generates a basic detection signal in a predetermined frequency band, and detects the presence or absence of a metal object based on a phenomenon in which the signal changes due to a metal object such as a vehicle. Background technique [0004] The vehicle detection sensor of this kind of metal detection sensor is installed in a parking space (parking space) such as a parking lot to detect a parked vehicle, and includes: a signal transmitting coil, which is an electromagnetic resonance circuit that generates a basic detection signal in a predetermined frequency band; and a signal receiving coil It is configure...

Claims

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Application Information

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IPC IPC(8): G01V3/10
CPCG01V3/104
Inventor 水田贵博永野正和冈本信治
Owner OPTEX CO LTD