[go: up one dir, main page]

JPS5660378A - Metallic body detector - Google Patents

Metallic body detector

Info

Publication number
JPS5660378A
JPS5660378A JP13529379A JP13529379A JPS5660378A JP S5660378 A JPS5660378 A JP S5660378A JP 13529379 A JP13529379 A JP 13529379A JP 13529379 A JP13529379 A JP 13529379A JP S5660378 A JPS5660378 A JP S5660378A
Authority
JP
Japan
Prior art keywords
detector
processing circuit
point
magnetic
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP13529379A
Other languages
Japanese (ja)
Other versions
JPS5845678B2 (en
Inventor
Tomiyo Yamato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kyosan Electric Manufacturing Co Ltd
Original Assignee
Kyosan Electric Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kyosan Electric Manufacturing Co Ltd filed Critical Kyosan Electric Manufacturing Co Ltd
Priority to JP54135293A priority Critical patent/JPS5845678B2/en
Publication of JPS5660378A publication Critical patent/JPS5660378A/en
Publication of JPS5845678B2 publication Critical patent/JPS5845678B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Geophysics And Detection Of Objects (AREA)
  • Train Traffic Observation, Control, And Security (AREA)

Abstract

PURPOSE: To generate an output from the signal processing circuit when expected conditions have completed to prevent malfunctions, by providing a detector to detect characters peculiar to the metallic body to be detected, a level detector operated according to the magnitude of the detection signal, and so on.
CONSTITUTION: When metallic body 1 of the object to be detected, for example, a train approaches magnetic detector 2 in a constant speed, low-level detector 3 reacts at point A1 of low level LL to send the detection signal to signal processing circuit 9 through the magnetic detector generates the voltage shown in the figure. When the train approaches furthermore, the magnetic detection signal voltage is increased, and middle level detector 4 is operated at point B1 of middle level ML. This operation signal is sent to signal processing circuit 9 also. When the train passes through the magnetic detector to reduce the magnetic detection signal voltage and detector 4 detects point B2 of ML again, signal processing circuit 9 sends the output signal to output driving circuit 10 under three conditions of (a) no operation signal exists in high-level detector 5, (b) point B2 is detected with detector 4, and (c) counter number of counter 7 is "1".
COPYRIGHT: (C)1981,JPO&Japio
JP54135293A 1979-10-22 1979-10-22 Metal object detection device Expired JPS5845678B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54135293A JPS5845678B2 (en) 1979-10-22 1979-10-22 Metal object detection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54135293A JPS5845678B2 (en) 1979-10-22 1979-10-22 Metal object detection device

Publications (2)

Publication Number Publication Date
JPS5660378A true JPS5660378A (en) 1981-05-25
JPS5845678B2 JPS5845678B2 (en) 1983-10-12

Family

ID=15148306

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54135293A Expired JPS5845678B2 (en) 1979-10-22 1979-10-22 Metal object detection device

Country Status (1)

Country Link
JP (1) JPS5845678B2 (en)

Also Published As

Publication number Publication date
JPS5845678B2 (en) 1983-10-12

Similar Documents

Publication Publication Date Title
ES8303756A1 (en) Improvements in and relating to apparatus for checking the validity of coins.
FR2425179A1 (en) EDDY CURRENT CONTROL DEVICE
JPS5660378A (en) Metallic body detector
ES8608174A1 (en) Circuit for detecting the passage through zero of the signal generated by an electromagnetic sensor of the phonic wheel type.
GB1524376A (en) Detection system
JPS5347614A (en) Control system for magnetically suspended and driven vehicle
JPS55121517A (en) Sound announciator
JPS5429528A (en) Magnetic pattern detector
JPS57103018A (en) Measuring device for vehicle weight
JPS5654120A (en) Amplitude discriminating circuit for magnetic recorder
JPS57116370A (en) Toner-density detecting circuit of electronic copying machine
JPS5437448A (en) Overload detecting circuit of power amplifier
JPS57198809A (en) System for improving signal to noise ratio
JPS5251961A (en) Digital detector for vehicles
JPS5295447A (en) Signal device for elevator
JPS5383526A (en) Receiving device for multiple information signal
JPS55114031A (en) Detector for pulse absence
JPS5217064A (en) Vehicle and speed detector unit
JPS5517279A (en) Circuit for detecting load short-circuit
JPS5312577A (en) Apparatus for preventing double-beating of press
JPS52126207A (en) Magnetic disc rotary direction detector
JPS5528140A (en) Control circuit having automatic check system
JPS5437559A (en) Detection circuit for direct-current voltage
JPS53138119A (en) Sliding or idling wheel detector
JPS53138338A (en) Detecting method for paper jamming