JPS53142260A - Method and apparatus of detecting metal objects - Google Patents

Method and apparatus of detecting metal objects

Info

Publication number
JPS53142260A
JPS53142260A JP5741177A JP5741177A JPS53142260A JP S53142260 A JPS53142260 A JP S53142260A JP 5741177 A JP5741177 A JP 5741177A JP 5741177 A JP5741177 A JP 5741177A JP S53142260 A JPS53142260 A JP S53142260A
Authority
JP
Japan
Prior art keywords
metal objects
detecting metal
reduce
signals
different frequencies
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
JP5741177A
Other languages
Japanese (ja)
Other versions
JPS6048712B2 (en
Inventor
Kazuo Moriya
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.)
Nippon Signal Co Ltd
Original Assignee
Nippon Signal 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 Nippon Signal Co Ltd filed Critical Nippon Signal Co Ltd
Priority to JP52057411A priority Critical patent/JPS6048712B2/en
Publication of JPS53142260A publication Critical patent/JPS53142260A/en
Publication of JPS6048712B2 publication Critical patent/JPS6048712B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Geophysics And Detection Of Objects (AREA)

Abstract

PURPOSE: To simplify constitution and reduce size and reduce detecting errors by generating pulses corresponding to the phase differences of the signals of different frequencies applied to a loop coil and the induction signal by the object.
COPYRIGHT: (C)1978,JPO&Japio
JP52057411A 1977-05-18 1977-05-18 Metal object detection method and device Expired JPS6048712B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP52057411A JPS6048712B2 (en) 1977-05-18 1977-05-18 Metal object detection method and device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52057411A JPS6048712B2 (en) 1977-05-18 1977-05-18 Metal object detection method and device

Publications (2)

Publication Number Publication Date
JPS53142260A true JPS53142260A (en) 1978-12-11
JPS6048712B2 JPS6048712B2 (en) 1985-10-29

Family

ID=13054894

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52057411A Expired JPS6048712B2 (en) 1977-05-18 1977-05-18 Metal object detection method and device

Country Status (1)

Country Link
JP (1) JPS6048712B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5373301A (en) * 1993-01-04 1994-12-13 Checkpoint Systems, Inc. Transmit and receive antenna having angled crossover elements
US8278918B2 (en) 2010-10-07 2012-10-02 Mettler-Toledo Safeline Limited Method for operating of a metal detection system and metal detection system
US8314713B2 (en) 2010-10-07 2012-11-20 Mettler-Toledo Safeline Limited Method for monitoring the operation of a metal detection system and metal detection system
US8587301B2 (en) 2010-10-07 2013-11-19 Mettler-Toledo Safeline Limited Method for operating a metal detection system and metal detection system
US9018935B2 (en) 2011-09-19 2015-04-28 Mettler-Toledo Safeline Limited Method for operating a metal detection apparatus and apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5373301A (en) * 1993-01-04 1994-12-13 Checkpoint Systems, Inc. Transmit and receive antenna having angled crossover elements
US8278918B2 (en) 2010-10-07 2012-10-02 Mettler-Toledo Safeline Limited Method for operating of a metal detection system and metal detection system
US8314713B2 (en) 2010-10-07 2012-11-20 Mettler-Toledo Safeline Limited Method for monitoring the operation of a metal detection system and metal detection system
US8587301B2 (en) 2010-10-07 2013-11-19 Mettler-Toledo Safeline Limited Method for operating a metal detection system and metal detection system
US9018935B2 (en) 2011-09-19 2015-04-28 Mettler-Toledo Safeline Limited Method for operating a metal detection apparatus and apparatus

Also Published As

Publication number Publication date
JPS6048712B2 (en) 1985-10-29

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