JPS55106372A - Sensor for electrostatic substance - Google Patents

Sensor for electrostatic substance

Info

Publication number
JPS55106372A
JPS55106372A JP1392679A JP1392679A JPS55106372A JP S55106372 A JPS55106372 A JP S55106372A JP 1392679 A JP1392679 A JP 1392679A JP 1392679 A JP1392679 A JP 1392679A JP S55106372 A JPS55106372 A JP S55106372A
Authority
JP
Japan
Prior art keywords
electrode
substance
sensor
entry
car
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
JP1392679A
Other languages
Japanese (ja)
Inventor
Koichi Yomogihara
Kiyoshi Tanaka
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 JP1392679A priority Critical patent/JPS55106372A/en
Publication of JPS55106372A publication Critical patent/JPS55106372A/en
Pending legal-status Critical Current

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  • Geophysics And Detection Of Objects (AREA)

Abstract

PURPOSE: To obtain a sensor which is easily installed and able to perform the continuous sampling, by detecting the substance by making use of the fact that the electrostatic capacity between the ground and the electrode distributed in the air through supporting by the insulator varies by the entry of the car or the like.
CONSTITUTION: Bar-type electrode 6 is supported by insulators 5 and 4 to be located in the air, and then the detection is given to the fact that electrostatic capacity C between electrode 6 and the ground varies by the entry of the car 3 or the human body. for instance, sensor main body 7 consisting of oscillator 11, bridge circuit 12 and others is connected to electrode 6 via coaxial cable 8, impedance converting single-turn transformer 9 and feeder 10 each. Then the unbalanced voltage of circuit 12 caused by the change of capacity C is delivered to terminal 15 via amplifier 13 and rectifier 14, and only the variation amount is extracted via capacitor 16 and diode 17 and then amplified through DC amplifier 18 to obtain the sensing output of the substance.
COPYRIGHT: (C)1980,JPO&Japio
JP1392679A 1979-02-09 1979-02-09 Sensor for electrostatic substance Pending JPS55106372A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1392679A JPS55106372A (en) 1979-02-09 1979-02-09 Sensor for electrostatic substance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1392679A JPS55106372A (en) 1979-02-09 1979-02-09 Sensor for electrostatic substance

Publications (1)

Publication Number Publication Date
JPS55106372A true JPS55106372A (en) 1980-08-15

Family

ID=11846781

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1392679A Pending JPS55106372A (en) 1979-02-09 1979-02-09 Sensor for electrostatic substance

Country Status (1)

Country Link
JP (1) JPS55106372A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6392911U (en) * 1986-12-09 1988-06-15

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6392911U (en) * 1986-12-09 1988-06-15

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