DE3466445D1 - Measuring device for detecting the self-capacitance or the variability of the same at a capacitive protective fence - Google Patents

Measuring device for detecting the self-capacitance or the variability of the same at a capacitive protective fence

Info

Publication number
DE3466445D1
DE3466445D1 DE8484106528T DE3466445T DE3466445D1 DE 3466445 D1 DE3466445 D1 DE 3466445D1 DE 8484106528 T DE8484106528 T DE 8484106528T DE 3466445 T DE3466445 T DE 3466445T DE 3466445 D1 DE3466445 D1 DE 3466445D1
Authority
DE
Germany
Prior art keywords
self
capacitance
rln
central control
electrode wires
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.)
Expired
Application number
DE8484106528T
Other languages
German (de)
Inventor
Uwe Metzner
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to DE8484106528T priority Critical patent/DE3466445D1/en
Application granted granted Critical
Publication of DE3466445D1 publication Critical patent/DE3466445D1/en
Expired legal-status Critical Current

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)
  • Measurement Of Resistance Or Impedance (AREA)
  • Fencing (AREA)
  • Testing Or Measuring Of Semiconductors Or The Like (AREA)

Abstract

1. A measuring arrangement at a capacitive protective fence for determining the self-capacitive component or variation therein, as the case may be, provided with long connection lines formed by coaxial cables between a central control and the electrode wires, characterised in that an outward line (HL) is provided by means of which the respective electrode wires (E1 to En) are supplied, via the primary winding (PW1 to PWn) of a respective transformer (Ü1 to Ün), with transmitting energy of a transmitte, (SEN) arranged in the central control (Z), and that a number of return lines (RL1 to RLn) corresponding to the number (n) of electrode wires (E1 to En) are provided, which connect the respective secondary windings (SW1 to SWn) of the transformers (Ü1 to Ün) to respective oscillatory circuits (SK1 to SKn) in the central control (Z) on which the voltage (U1 to Un) proportional to the respective self-capacitive component (CE1 to CEn) is measured, where the screen of the outward and return lines (HL and RL1 to RLn) is connected 10 earth potential, and a capacitor (C) in the respective oscillatory circuit (SK) has a capacitance substantially greater than the cable capacitance (CKR) of the respective return lines (RL1 to RLn).
DE8484106528T 1983-06-14 1984-06-07 Measuring device for detecting the self-capacitance or the variability of the same at a capacitive protective fence Expired DE3466445D1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE8484106528T DE3466445D1 (en) 1983-06-14 1984-06-07 Measuring device for detecting the self-capacitance or the variability of the same at a capacitive protective fence

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3321471A DE3321471A1 (en) 1983-06-14 1983-06-14 MEASURING ARRANGEMENT FOR DETERMINING OWN CAPACITY OR CHANGING IT TO A CAPACITIVE FENCE
DE8484106528T DE3466445D1 (en) 1983-06-14 1984-06-07 Measuring device for detecting the self-capacitance or the variability of the same at a capacitive protective fence

Publications (1)

Publication Number Publication Date
DE3466445D1 true DE3466445D1 (en) 1987-10-29

Family

ID=6201465

Family Applications (2)

Application Number Title Priority Date Filing Date
DE3321471A Withdrawn DE3321471A1 (en) 1983-06-14 1983-06-14 MEASURING ARRANGEMENT FOR DETERMINING OWN CAPACITY OR CHANGING IT TO A CAPACITIVE FENCE
DE8484106528T Expired DE3466445D1 (en) 1983-06-14 1984-06-07 Measuring device for detecting the self-capacitance or the variability of the same at a capacitive protective fence

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE3321471A Withdrawn DE3321471A1 (en) 1983-06-14 1983-06-14 MEASURING ARRANGEMENT FOR DETERMINING OWN CAPACITY OR CHANGING IT TO A CAPACITIVE FENCE

Country Status (3)

Country Link
EP (1) EP0131738B1 (en)
AT (1) ATE29932T1 (en)
DE (2) DE3321471A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3769348D1 (en) * 1986-03-04 1991-05-23 Siemens Ag CAPACITIVE INTRUSION PROTECTION SYSTEM.
AU1044197A (en) * 1995-12-07 1997-06-27 Telefonaktiebolaget Lm Ericsson (Publ) Emergency call handling in a cellular telecommunications system
NZ531133A (en) * 2004-02-25 2005-11-25 Gallagher Group Ltd A portable tester and remote control apparatus for an electric fence

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1275417B (en) * 1966-09-29 1968-08-14 Siemens Ag Room protection device for open-air systems with capacitive electrodes arranged in the branches of a bridge circuit
DE1762448A1 (en) * 1968-06-19 1970-03-19 Wilhelm Riechmann Capacitive proximity switch
GB2015165B (en) * 1978-02-09 1983-01-12 Koa Oil Co Ltd Detecting capacitively corrosion of pipes
US4293852A (en) * 1978-12-08 1981-10-06 Lawrence Security Services Ltd. Capacitive article removal alarm

Also Published As

Publication number Publication date
DE3321471A1 (en) 1984-12-20
ATE29932T1 (en) 1987-10-15
EP0131738A1 (en) 1985-01-23
EP0131738B1 (en) 1987-09-23

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee