JPS5791476A - Electric field type human body detector - Google Patents

Electric field type human body detector

Info

Publication number
JPS5791476A
JPS5791476A JP55168920A JP16892080A JPS5791476A JP S5791476 A JPS5791476 A JP S5791476A JP 55168920 A JP55168920 A JP 55168920A JP 16892080 A JP16892080 A JP 16892080A JP S5791476 A JPS5791476 A JP S5791476A
Authority
JP
Japan
Prior art keywords
frequency
power source
detection signal
circuit
electric power
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
JP55168920A
Other languages
Japanese (ja)
Other versions
JPS6314787B2 (en
Inventor
Yuji Takada
Hironobu Inoue
Hiroshi Ohashi
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 JP55168920A priority Critical patent/JPS5791476A/en
Publication of JPS5791476A publication Critical patent/JPS5791476A/en
Publication of JPS6314787B2 publication Critical patent/JPS6314787B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
    • G01V3/088—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices operating with electric fields

Abstract

PURPOSE:To eliminate the possibility of false announcing occurring due to such as higher harmonic noises generated synchronously with an electric power source by holding an electric power source frequency at non-integer times with a frequency conversion circuit thereby obtaining a detection signal. CONSTITUTION:A frequency conversion circuit 1a has a multiplying circuit, generates the signal of the frequency non-integer times the electric power source frequency and supplies the same to an oscillator 1b. The oscillator 1b oscillates at the output frequency of the circuit 1a and applies the output thereof as a detection signal to an exciting line 2. In this way, the frequency of the detection signal is fixed at non-integer times of the power source frequency, whereby the detection signal is positioned approximately at the center of the frequency of the higher harmonic noise of the power source, and a beat is set so relatively high frequency as to be blocked with a BPF 6; therefore, the possibility of causing malfunction of an announcing circuit by the beat in accordance with the higher harmonic noises is eliminated.
JP55168920A 1980-11-28 1980-11-28 Electric field type human body detector Granted JPS5791476A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55168920A JPS5791476A (en) 1980-11-28 1980-11-28 Electric field type human body detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55168920A JPS5791476A (en) 1980-11-28 1980-11-28 Electric field type human body detector

Publications (2)

Publication Number Publication Date
JPS5791476A true JPS5791476A (en) 1982-06-07
JPS6314787B2 JPS6314787B2 (en) 1988-04-01

Family

ID=15877000

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55168920A Granted JPS5791476A (en) 1980-11-28 1980-11-28 Electric field type human body detector

Country Status (1)

Country Link
JP (1) JPS5791476A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6052789A (en) * 1983-08-31 1985-03-26 Matsushita Electric Works Ltd Electric field type human body detector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6052789A (en) * 1983-08-31 1985-03-26 Matsushita Electric Works Ltd Electric field type human body detector

Also Published As

Publication number Publication date
JPS6314787B2 (en) 1988-04-01

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