EP0239807A1 - Système capacitif de protection contre l'intrusion - Google Patents

Système capacitif de protection contre l'intrusion Download PDF

Info

Publication number: EP0239807A1
Authority: EP; European Patent Office
Prior art keywords: current; cable; measuring; winding; electrode
Prior art date: 1986-03-04
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

EP87102947A

Other languages

German (de)

English (en)

Other versions

EP0239807B1 (fr

Inventor

Uwe Metzner

Peer Dr. Ing. Thilo

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

Siemens Corp

Original Assignee

Siemens AG

Siemens Corp

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.)

1986-03-04

Filing date

1987-03-02

Publication date

1987-10-07

1987-03-02 Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG

1987-03-02 Priority to AT87102947T priority Critical patent/ATE62766T1/de

1987-10-07 Publication of EP0239807A1 publication Critical patent/EP0239807A1/fr

1991-04-17 Application granted granted Critical

1991-04-17 Publication of EP0239807B1 publication Critical patent/EP0239807B1/fr

2007-03-02 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Images

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

Definitions

the invention relates to a capacitive intrusion protection system in which the electrodes are connected to an evaluation device via coaxial connecting lines, in which the respective electrode currents are measured using measuring devices arranged in the connecting lines.
the electrodes are connected to the evaluation device via cables, generally coaxial cables.
the capacities or changes in capacitance between the transmitting and receiving electrodes and / or also between the transmitting electrodes and the earth (earth potential) are measured and alarm criteria for an alarm are derived therefrom.
the currents flowing over the electrode capacitance are measured and evaluated. For example, such a method is described in DE-OS 33 29 554. There the electrode currents are measured to measure the capacitive state changes on a protective fence in each electrode circuit with the aid of current measuring devices and the respective operating capacity of the electrode is obtained therefrom.
DE-OS 33 21 471 has therefore already proposed a measuring arrangement for measuring capacitance in which the disruptive influences caused by the cable capacitances are avoided.
additional and return lines are provided for each electrode, which are connected to the electrode via additional transmitters.
the object of the invention is therefore to avoid the disadvantages described above and for a capacitive intrusion protection system a measuring arrangement for measuring the transmission currents in the electrode circuit to be specified in which the cable capacities have no disruptive influence on the measurement result. Neither expensive special cables nor complex circuit arrangements should be used.
a current measuring device is arranged in the transmission circuit between the transmitter and the coaxial conductor of the connecting line, that a further current measuring device is arranged between the shield conductor of the connecting line and the earth potential, and in that the difference from the measuring current and the cable current flowing through the cable capacitance is formed and the actually determined electrode current is processed further.
both currents are measured individually.
the cable current is eliminated by the difference formation, so that the electrode current actually flowing over the electrodes is measured and evaluated.
the current measured in each case can advantageously be converted with an analog-digital converter and the difference can be formed in a connected microcomputer.
a specially designed measuring transducer can be provided as the measuring device for measuring the measuring current flowing in the coaxial conductor and for measuring the cable current via the shield conductor.
the primary winding is arranged in the electrode circuit. The current to be measured or the associated current is fed via the secondary winding proportional voltage tapped.
an additional, third winding is arranged in the transducer, which is connected on the one hand to the shield conductor of the coaxial connecting line and on the other hand is at ground potential. This additional winding leads the cable current in such a way that it is subtracted from the original measuring current. It is thereby achieved in a simple but advantageous manner that the cable current flowing over the unavoidable cable capacities no longer interferes with the measurement.
the primary winding and the additional third winding have the same number of turns, so that the cable current flowing through the third winding flows counter to the actual measuring current and is subtracted in this way. The current actually flowing to earth via the electrode capacity is therefore measured on the secondary winding.
a measuring transducer MW with its primary winding PW is arranged in the electrode circuit in the evaluation device AWE.
the transducer is connected to the transmitter SEN, which for example generates an AC voltage US of 100 volts.
the second terminal of the transmitter is at ground potential EP.
the measuring current IM which is measured via the secondary winding SW of the measuring transducer MW, flows into the coaxial conductor KL of the connecting line VL, for example in the form of a proportional voltage there can be tapped.
the measured current IM consists of the sum of the electrode current IE flowing via the electrode E and the electrode capacitance CE to the earth point EP and the cable current IK flowing via the cable capacitance CK to the screen Sch of the coaxial cable or earth potential EP.
the measured current value is falsified depending on the cable capacity CK.
a first measuring device MIM is arranged in the electrode circuit, ie between the transmitter SEN and the coaxial conductor KL of the connecting line VL.
the shield conductor Sch of the coaxial connecting line VL is not directly grounded, but leads to the evaluation device AWE.
MIK further measuring device
the cable current IK is subtracted from the measurement current IM via a subtraction device located in the evaluation device, so that the electrode current IE actually flowing through the electrode E and electrode capacitance CE is measured.
FIG. 3 A simple exemplary embodiment of the arrangement according to the invention is shown in FIG. 3.
the measuring device ME is formed by a measuring transducer MW which, in addition to the known primary winding PW in the electrode circuit and the secondary winding SW, has a third winding W3 for tapping the measuring current IM. 2
this third winding W3 is connected to the shield conductor Sch of the coaxial connecting line VL, via which the cable current IK caused by the cable capacitance CK flows.
the other end of the third winding W3 is at ground potential EP.
the number of turns of the primary winding PW and the third additional winding W3 are of equal size, so that the additional winding W3 is flowed through in the opposite direction and the interfering cable current IK is subtracted from the measuring current IM, so that the electrode current IE actually to be measured is determined.
the arrangement according to the invention is used in a capacitive intrusion protection system for a plurality of electrodes which are fed by a transmitter and in which the electrode currents are measured in order to determine the electrode capacities.

Landscapes

Physics & Mathematics (AREA)
General Physics & Mathematics (AREA)
Burglar Alarm Systems (AREA)
Emergency Protection Circuit Devices (AREA)
Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

EP87102947A 1986-03-04 1987-03-02 Système capacitif de protection contre l'intrusion Expired - Lifetime EP0239807B1 (fr)

Priority Applications (1)

Application Number	Priority Date	Filing Date	Title
AT87102947T ATE62766T1 (de)	1986-03-04	1987-03-02	Kapazitives intrusionsschutzsystem.

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
DE3607017		1986-03-04
DE3607017		1986-03-04

Publications (2)

Publication Number	Publication Date
EP0239807A1 true EP0239807A1 (fr)	1987-10-07
EP0239807B1 EP0239807B1 (fr)	1991-04-17

Family

ID=6295448

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP87102947A Expired - Lifetime EP0239807B1 (fr)	1986-03-04	1987-03-02	Système capacitif de protection contre l'intrusion

Country Status (3)

Country	Link
EP (1)	EP0239807B1 (fr)
AT (1)	ATE62766T1 (fr)
DE (1)	DE3769348D1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2700857A1 (fr) *	1993-01-27	1994-07-29	Conmed Corp	Détecteur de courant pour dispositifs médicaux comprenant des câbles connecteurs.
GB2278548A (en) *	1993-06-01	1994-12-07	Conmed Corp	Current sensor for medical devices including connector cables
WO2021160858A1 (fr) *	2020-02-13	2021-08-19	Université De Reims Champagne-Ardenne	Procede de detection de la modification de l'environnement d'un cable

Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE1104868B (de) *	1959-03-06	1961-04-13	Telefonbau	Elektrische Raumschutzanlage
US4293852A (en) *	1978-12-08	1981-10-06	Lawrence Security Services Ltd.	Capacitive article removal alarm
EP0131738A1 (fr) *	1983-06-14	1985-01-23	Siemens Aktiengesellschaft	Dispositif de mesure pour détecter la capacité ou les altérations propres à une clôture capacitive de protection
DE3329554A1 (de) *	1983-08-16	1985-03-07	Siemens AG, 1000 Berlin und 8000 München	Verfahren und anordnung zur messung von kapazitiven zustandsaenderungen an einem schutzzaun

1987
- 1987-03-02 EP EP87102947A patent/EP0239807B1/fr not_active Expired - Lifetime
- 1987-03-02 DE DE8787102947T patent/DE3769348D1/de not_active Expired - Lifetime
- 1987-03-02 AT AT87102947T patent/ATE62766T1/de not_active IP Right Cessation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE1104868B (de) *	1959-03-06	1961-04-13	Telefonbau	Elektrische Raumschutzanlage
US4293852A (en) *	1978-12-08	1981-10-06	Lawrence Security Services Ltd.	Capacitive article removal alarm
EP0131738A1 (fr) *	1983-06-14	1985-01-23	Siemens Aktiengesellschaft	Dispositif de mesure pour détecter la capacité ou les altérations propres à une clôture capacitive de protection
DE3329554A1 (de) *	1983-08-16	1985-03-07	Siemens AG, 1000 Berlin und 8000 München	Verfahren und anordnung zur messung von kapazitiven zustandsaenderungen an einem schutzzaun

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2700857A1 (fr) *	1993-01-27	1994-07-29	Conmed Corp	Détecteur de courant pour dispositifs médicaux comprenant des câbles connecteurs.
GB2274592A (en) *	1993-01-27	1994-08-03	Conmed Corp	Current sensor for medical devices including connector cables
AU660866B2 (en) *	1993-01-27	1995-07-06	Conmed Corporation	Current sensor for medical devices including connector cables
GB2274592B (en) *	1993-01-27	1996-12-18	Conmed Corp	Current sensor for medical devices including connector cables
GB2278548A (en) *	1993-06-01	1994-12-07	Conmed Corp	Current sensor for medical devices including connector cables
FR2706041A1 (fr) *	1993-06-01	1994-12-09	Conmed Corp	Détecteur de courant pour dispositifs médicaux incluant des câbles de connexion.
AU671902B2 (en) *	1993-06-01	1996-09-12	Conmed Corporation	Current sensor for medical devices with continuity monitor
GB2278548B (en) *	1993-06-01	1996-11-20	Conmed Corp	Current sensor for medical devices with continuity monitor
WO2021160858A1 (fr) *	2020-02-13	2021-08-19	Université De Reims Champagne-Ardenne	Procede de detection de la modification de l'environnement d'un cable
FR3107286A1 (fr) *	2020-02-13	2021-08-20	Université De Reims Champagne-Ardenne	Procédé de détection de la modification de l’environnement d’un câble
CN115605324A (zh) *	2020-02-13	2023-01-13	兰斯大学（Fr）	用于检测线缆的环境变化的方法

Also Published As

Publication number	Publication date
ATE62766T1 (de)	1991-05-15
DE3769348D1 (de)	1991-05-23
EP0239807B1 (fr)	1991-04-17

Publication	Publication Date	Title
WO1996029608A1 (fr)	1996-09-26	Systeme optique actif de mesure du courant
DE2603185C2 (de)	1986-05-28	Anordnung zur kapazitiven Messung des Füllstandes eines Behälters
DE69730167T2 (de)	2005-08-04	Ein gerät zur überwachung teilweiser entladungen in einem gerät mit elektrischer hochspannung oder in einer hochspannungsanlage
EP0239807B1 (fr)	1991-04-17	Système capacitif de protection contre l'intrusion
DE3027398C2 (de)	1985-01-03	Elektrische Anzeigevorrichtung
DE69019891T2 (de)	1996-03-21	Optischer Transformator.
DE19527972B4 (de)	2007-04-26	Messschaltung unter Verwendung eines Messfühlers zum Erfassen und Orten von Wassereinbrüchen
EP0209711B1 (fr)	1991-03-13	Système de mesure pour la mesure de l'aptitude à la déformation de globules rouges
DE4331184C2 (de)	1996-05-15	Auswerteschaltung
EP0131738B1 (fr)	1987-09-23	Dispositif de mesure pour détecter la capacité ou les altérations propres à une clôture capacitive de protection
DE3222640C2 (de)	1984-03-29	Meßanordnung für eine Mehrzahl von Elektroden aufweisende, kapazitive Schutzzäune
EP0839325B1 (fr)	2001-12-19	Montage de mesure pour la detection et la localisation d'entrees d'eau dans des tuyaux ou des cables
EP0060319B1 (fr)	1985-08-28	Procédé et dispositif de mesure des capacités d'une cloture de protection à effet capacitif
DE19544391A1 (de)	1997-05-22	Meßschaltung zum Erfassen und Orten von Wassereinbrüchen an Rohr- oder Kabelanlagen
EP3680678B1 (fr)	2024-08-28	Système de mesure permettant de détecter des perturbations sur les lignes d'un appareil ou d'une installation
EP0259627A2 (fr)	1988-03-16	Arrangement d'isolateurs pour une clôture capacitive de protection
DE2906669A1 (de)	1980-09-04	Schaltanordnung zur verringerung elektrischer stoereinfluesse auf elektromechanische waagen
EP0805423A2 (fr)	1997-11-05	Dispositif pour déterminer la validité de pièces de monnaie, jetons ou autres objets plats métalliques
DE4406722C1 (de)	1995-08-03	Leitungsdifferential-Schutzanordnung
EP0678890A1 (fr)	1995-10-25	Méthode et dispositif pour la détection de l'état des disjoncteurs de ligne
DE3032777C2 (de)	1983-07-14	Anordnung zum Empfindlichkeitsausgleich des Indikators in Meßbrückenschaltungen
EP1055914A1 (fr)	2000-11-29	Dispositif de capteurs magnétiques de position
DE102022003602A1 (de)	2024-04-04	Verfahren zum Erkennen einer Anwesenheit einer menschlichen Hand in einem Greifbereich eines Lenkrads
EP1033580A2 (fr)	2000-09-06	Compteur d'électricité
DE102004007369A1 (de)	2005-09-08	Schaltungsanordnung sowie Verfahren zur Detektion eines Masseschlusses

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1987-08-22	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
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