JPS5636075A - Field-type conductor sensor - Google Patents

Field-type conductor sensor

Info

Publication number
JPS5636075A
JPS5636075A JP11310879A JP11310879A JPS5636075A JP S5636075 A JPS5636075 A JP S5636075A JP 11310879 A JP11310879 A JP 11310879A JP 11310879 A JP11310879 A JP 11310879A JP S5636075 A JPS5636075 A JP S5636075A
Authority
JP
Japan
Prior art keywords
sensing
wire
voltage
vegetation
swinging
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.)
Pending
Application number
JP11310879A
Other languages
Japanese (ja)
Inventor
Hiroshi Ohashi
Hironobu Inoue
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP11310879A priority Critical patent/JPS5636075A/en
Publication of JPS5636075A publication Critical patent/JPS5636075A/en
Pending legal-status Critical Current

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  • Geophysics And Detection Of Objects (AREA)

Abstract

PURPOSE: To prevent the malfunction of the field-type conductor sensor caused by the swinging vegetation and the like by arranging a pair of parallel sensing wires symmetrically on both sides of an exciting wire to sense the phase relation between the difference voltage between the induced voltages of the sensing wires and the induced voltage of one sensing wire.
CONSTITUTION: The induced voltages of the parallel sensing wires 9 and 10 arranged symmetrically on both sides of the exciting wire 8 are converted into rectangular-wave voltages in a limiter 12 through a differential operational amplifier 11 and at the same time, the induced voltage of the sensing wire 9 is converted into a rectangular-wave voltage in a limiter 13. Ths outputs of the limiters 12 and 13 are entered in an exclusive "or" circuit 14 to judge whether the output phases are in- phase or opposite phase. When the output state having been inverted returns to the original state, a switching circuit 16 is operated through a human body movement sensing circuit 15. By the constitution, the phase relation between the induced voltages VB of the sensing wire 9 and the difference voltage VB-VC is not changed by the swinging vegetation and the like within the range of one of the sensing wires 9 and 10. Thus, the malfunction caused by the swinging vegetation and the like can be prevented.
COPYRIGHT: (C)1981,JPO&Japio
JP11310879A 1979-08-31 1979-08-31 Field-type conductor sensor Pending JPS5636075A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11310879A JPS5636075A (en) 1979-08-31 1979-08-31 Field-type conductor sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11310879A JPS5636075A (en) 1979-08-31 1979-08-31 Field-type conductor sensor

Publications (1)

Publication Number Publication Date
JPS5636075A true JPS5636075A (en) 1981-04-09

Family

ID=14603693

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11310879A Pending JPS5636075A (en) 1979-08-31 1979-08-31 Field-type conductor sensor

Country Status (1)

Country Link
JP (1) JPS5636075A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57178173A (en) * 1981-04-27 1982-11-02 Matsushita Electric Works Ltd Detector
WO1999002343A1 (en) * 1997-07-11 1999-01-21 Kodak Polychrome Graphics Company Ltd. Pattern formation
JP2015537195A (en) * 2012-10-05 2015-12-24 ボスティク エス．アー． Capacitive sensor for detecting the presence of objects and / or humans

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57178173A (en) * 1981-04-27 1982-11-02 Matsushita Electric Works Ltd Detector
JPS6146790B2 (en) * 1981-04-27 1986-10-16 Matsushita Electric Works Ltd
WO1999002343A1 (en) * 1997-07-11 1999-01-21 Kodak Polychrome Graphics Company Ltd. Pattern formation
JP2015537195A (en) * 2012-10-05 2015-12-24 ボスティク エス．アー． Capacitive sensor for detecting the presence of objects and / or humans

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