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SE8100184L - BURGLAR ALARM - Google Patents

BURGLAR ALARM

Info

Publication number
SE8100184L
SE8100184L SE8100184A SE8100184A SE8100184L SE 8100184 L SE8100184 L SE 8100184L SE 8100184 A SE8100184 A SE 8100184A SE 8100184 A SE8100184 A SE 8100184A SE 8100184 L SE8100184 L SE 8100184L
Authority
SE
Sweden
Prior art keywords
antenna
intruder
khz
oscillator
high frequency
Prior art date
Application number
SE8100184A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE450673B (en
Inventor
H Inoue
H Ohashi
Y Takada
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
Priority claimed from JP333080A external-priority patent/JPS56101294A/en
Priority claimed from JP4232480A external-priority patent/JPS56140487A/en
Priority claimed from JP55168918A external-priority patent/JPS603625B2/en
Application filed by Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Publication of SE8100184L publication Critical patent/SE8100184L/en
Publication of SE450673B publication Critical patent/SE450673B/en

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/26—Electrical actuation by proximity of an intruder causing variation in capacitance or inductance of a circuit

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

An intrusion warning system for indicating the presence of an intruder in a given area comprises a single antenna wire (4) encircling said area and insulated from the ground, a high frequency (e.g.1 kHz to 10 kHz) oscillator (1) for feeding a high frequency signal to the antenna (4), a coupling impedance (2), for example a capacitor, connected between an output terminal of the oscillator (1) and the antenna (4), and a signal processing means (5) which produces an alarm upon detecting a change to beyond a predetermined level of the voltage on the antenna (4), as induced by the proximity of an intruder. <IMAGE>
SE8100184A 1980-01-15 1981-01-14 Alert system, to indicate a person's presence in a given area SE450673B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP333080A JPS56101294A (en) 1980-01-15 1980-01-15 Electric field type human body detector
JP4232480A JPS56140487A (en) 1980-03-31 1980-03-31 Electric field type human body detector
JP55168918A JPS603625B2 (en) 1980-11-28 1980-11-28 Electric field human body detector

Publications (2)

Publication Number Publication Date
SE8100184L true SE8100184L (en) 1981-07-16
SE450673B SE450673B (en) 1987-07-13

Family

ID=27275768

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8100184A SE450673B (en) 1980-01-15 1981-01-14 Alert system, to indicate a person's presence in a given area

Country Status (6)

Country Link
AU (1) AU542678B2 (en)
DE (2) DE3100936C2 (en)
FR (1) FR2473764B1 (en)
GB (1) GB2069206B (en)
IT (1) IT1210603B (en)
SE (1) SE450673B (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56140487A (en) * 1980-03-31 1981-11-02 Matsushita Electric Works Ltd Electric field type human body detector
US4621258A (en) * 1983-08-22 1986-11-04 Campman James P Proximity detecting apparatus
DE3439015A1 (en) * 1984-10-25 1986-04-30 Horizont Gerätewerk GmbH, 3540 Korbach ELECTRIC FENCE
IT1218109B (en) * 1986-05-02 1990-04-12 Dei Dispositivi Elettronici In EQUIPMENT FOR DETECTION OF MOVING BODIES ON THE GROUND IN A PROTECTED AREA, IN PARTICULAR FOR MILITARY AND RELATED USES
GB2279757B (en) * 1990-11-16 1995-06-07 Moonstone Technology Ltd Device for determining the presence and/or characteristics of an object or a substance
SE9303582D0 (en) * 1993-10-29 1993-10-29 Goeran Hansson Touch and theft protection for office equipment
ES2183973T3 (en) * 1995-09-25 2003-04-01 Jorn Sorensen PROCEDURE AND DEVICE FOR DETECTING THE DISTANCE BETWEEN A FIRST OBJECT AND A SECOND OBJECT.
ITTO980452A1 (en) * 1998-05-26 1999-11-26 Elvis Sas Di Zannier Gian Carl DEVICE AND METHOD OF DETECTION OF THE PRESENCE OF THE HUMAN BODY.
GB0018914D0 (en) * 2000-08-03 2000-09-20 Rees John C Electronic safety control
FR2859302B1 (en) * 2003-08-27 2005-11-11 Serpe Iesm Soc D Etudes Et De SYSTEM FOR DETECTING AND LOCATING FAILURES IN AN ELECTRIFIED FENCE
AT512650B1 (en) * 2012-07-06 2013-10-15 Abatec Group Ag Truck anti-theft device by means of a tariff line
DE102018124389A1 (en) * 2018-10-02 2020-04-02 Livisi Gmbh Method and device for recognizing a person in a room

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2421771A (en) * 1942-07-17 1947-06-10 Glenn H Browning Approach protective system
US3230518A (en) * 1961-03-20 1966-01-18 American District Telegraph Co Method of detecting intruders and intruder detection apparatus of the capacity-type utilizing balanced asymmetric fields
US3462755A (en) * 1966-04-26 1969-08-19 Mosler Research Products Inc Capacity alarm
GB1320153A (en) * 1969-06-26 1973-06-13 Brown Y Alarm systems
US3697971A (en) * 1970-12-30 1972-10-10 Siegfried Domin Alarm system
US3829850A (en) * 1971-12-17 1974-08-13 Tyco Laboratories Inc Proximity detector
US4064499A (en) * 1975-09-12 1977-12-20 Stellar Systems, Inc. Intrusion warning system utilizing an electric field

Also Published As

Publication number Publication date
IT1210603B (en) 1989-09-14
AU6624081A (en) 1981-07-30
IT8167033A0 (en) 1981-01-14
AU542678B2 (en) 1985-03-07
GB2069206A (en) 1981-08-19
DE3100936A1 (en) 1981-12-03
DE3100936C2 (en) 1985-10-31
FR2473764A1 (en) 1981-07-17
FR2473764B1 (en) 1985-08-09
DE3152533C2 (en) 1984-06-07
SE450673B (en) 1987-07-13
GB2069206B (en) 1984-07-11

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