ES486395A1 - Sistema de seguridad - Google Patents
Sistema de seguridadInfo
- Publication number
- ES486395A1 ES486395A1 ES486395A ES486395A ES486395A1 ES 486395 A1 ES486395 A1 ES 486395A1 ES 486395 A ES486395 A ES 486395A ES 486395 A ES486395 A ES 486395A ES 486395 A1 ES486395 A1 ES 486395A1
- Authority
- ES
- Spain
- Prior art keywords
- bridge circuit
- impedance
- drift
- arms
- security system
- 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
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
- G08B29/18—Prevention or correction of operating errors
- G08B29/20—Calibration, including self-calibrating arrangements
- G08B29/24—Self-calibration, e.g. compensating for environmental drift or ageing of components
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R17/00—Measuring arrangements involving comparison with a reference value, e.g. bridge
- G01R17/02—Arrangements in which the value to be measured is automatically compared with a reference value
- G01R17/06—Automatic balancing arrangements
-
- 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
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
- G08B29/02—Monitoring continuously signalling or alarm systems
- G08B29/06—Monitoring of the line circuits, e.g. signalling of line faults
- G08B29/08—Signalling of tampering with the line circuit
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Burglar Alarm Systems (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Emergency Alarm Devices (AREA)
- Alarm Systems (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Air Bags (AREA)
Abstract
Sistema de seguridad, del tipo que comprende un circuito puente, que lleva, en una de sus ramas, un elemento conductor cuya impedancia se quiere controlar, y en sus otras ramas elementos patrones y (o) compensadores, medios para la alimentación de este puente en corriente alterna, medios para detectar un desequilibrio del puente que resulta de un cambio brusco de impedancia de este elemento conductor debido a una tentativa de intrusión, para poner en funcionamiento una alarma o una intervención, y medios para compensar la deriva de este circuito en puente, caracterizado porque uno, al menos, de los elementos patrones, es un elemento de impedancia variable, porque están previstos medios para detectar el desplazamiento de fase de la señal obtenida a la salida del puente, debido a una variación de impedancia por deriva, con relación a la frecuencia de alimentación en corriente alterna, y porque están previstos otros medios para provocar, a partir de la detección de este desplazamiento de fase,una modificación de la impedancia de este elemento o de estos elementos patrones, para compensar la deriva de este elemento a controlar.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7834188A FR2443683A1 (fr) | 1978-12-05 | 1978-12-05 | Systeme de securite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES486395A1 true ES486395A1 (es) | 1980-05-16 |
Family
ID=9215693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES486395A Expired ES486395A1 (es) | 1978-12-05 | 1979-11-28 | Sistema de seguridad |
Country Status (15)
| Country | Link |
|---|---|
| US (1) | US4420745A (es) |
| EP (1) | EP0012092B1 (es) |
| JP (1) | JPS55123794A (es) |
| AR (1) | AR225906A1 (es) |
| AT (1) | ATE4563T1 (es) |
| AU (1) | AU533426B2 (es) |
| BR (1) | BR7907900A (es) |
| CA (1) | CA1130885A (es) |
| DD (1) | DD147727A5 (es) |
| DE (1) | DE2966121D1 (es) |
| ES (1) | ES486395A1 (es) |
| FR (1) | FR2443683A1 (es) |
| IN (1) | IN153377B (es) |
| MX (1) | MX147487A (es) |
| ZA (1) | ZA796442B (es) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4580062A (en) * | 1983-04-21 | 1986-04-01 | Cosden Technology, Inc. | Safety shield control device |
| CA1254629A (en) * | 1986-03-21 | 1989-05-23 | Peter Faulkner | Equipment security system |
| JPS647198A (en) * | 1987-06-30 | 1989-01-11 | Nittan Co Ltd | Environmental abnormality warning device |
| AU2481088A (en) * | 1987-09-16 | 1989-04-17 | Simpson, Roland Bruce | Proximity sensor |
| US5225808A (en) * | 1990-08-08 | 1993-07-06 | Olivadotti William C | Long range intruder sensor |
| US5440501A (en) * | 1992-06-26 | 1995-08-08 | Mitutoyo Corporation | Energy saving capacitance type measuring device for absolute measurement of positions |
| US7538683B2 (en) * | 2005-10-26 | 2009-05-26 | Motorola, Inc. | Containment mechanism manipulation responsive electrical circuit power usage apparatus and method |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2031951A (en) * | 1932-02-25 | 1936-02-25 | Bell Telephone Labor Inc | Burglar alarm system |
| US2931957A (en) * | 1954-12-09 | 1960-04-05 | Paar Josef | Impedance bridge arrangements |
| US3423748A (en) * | 1965-10-20 | 1969-01-21 | Mosler Research Products Inc | Line supervisory circuit |
| US3801972A (en) * | 1971-06-23 | 1974-04-02 | Ambac Ind | Gas analyzer circuitry |
| US3939770A (en) * | 1971-12-22 | 1976-02-24 | The United States Of America As Represented By The Secretary Of The Navy | Short range passive electromagnetic detector |
| US4065762A (en) * | 1975-12-29 | 1977-12-27 | Walter John W | A.C. bridge intrusion alarm system |
| US4063447A (en) * | 1977-03-14 | 1977-12-20 | Honeywell, Inc. | Bridge circuit with drift compensation |
-
1978
- 1978-12-05 FR FR7834188A patent/FR2443683A1/fr active Granted
-
1979
- 1979-11-27 ZA ZA00796442A patent/ZA796442B/xx unknown
- 1979-11-28 ES ES486395A patent/ES486395A1/es not_active Expired
- 1979-12-03 IN IN864/DEL/79A patent/IN153377B/en unknown
- 1979-12-04 EP EP79400958A patent/EP0012092B1/fr not_active Expired
- 1979-12-04 DE DE7979400958T patent/DE2966121D1/de not_active Expired
- 1979-12-04 AU AU53440/79A patent/AU533426B2/en not_active Ceased
- 1979-12-04 CA CA341,169A patent/CA1130885A/en not_active Expired
- 1979-12-04 BR BR7907900A patent/BR7907900A/pt unknown
- 1979-12-04 DD DD79217351A patent/DD147727A5/de unknown
- 1979-12-04 MX MX180297A patent/MX147487A/es unknown
- 1979-12-04 AT AT79400958T patent/ATE4563T1/de not_active IP Right Cessation
- 1979-12-05 JP JP15869679A patent/JPS55123794A/ja active Pending
- 1979-12-05 AR AR219170A patent/AR225906A1/es active
-
1981
- 1981-12-08 US US06/328,646 patent/US4420745A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP0012092A1 (fr) | 1980-06-11 |
| AU5344079A (en) | 1980-06-12 |
| MX147487A (es) | 1982-12-07 |
| DD147727A5 (de) | 1981-04-15 |
| FR2443683A1 (fr) | 1980-07-04 |
| AU533426B2 (en) | 1983-11-24 |
| ATE4563T1 (de) | 1983-09-15 |
| FR2443683B1 (es) | 1981-12-04 |
| BR7907900A (pt) | 1980-07-29 |
| CA1130885A (en) | 1982-08-31 |
| IN153377B (es) | 1984-07-14 |
| US4420745A (en) | 1983-12-13 |
| EP0012092B1 (fr) | 1983-08-31 |
| AR225906A1 (es) | 1982-05-14 |
| DE2966121D1 (en) | 1983-10-06 |
| ZA796442B (en) | 1980-11-26 |
| JPS55123794A (en) | 1980-09-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| ES477892A1 (es) | Mejoras en reles de distancia a tierra empleando medicion decomparador de fase. | |
| JPS5631231A (en) | Phase locked loop circuit | |
| NO793384L (no) | Kobling til aa bestemme fasedirring i digitalsignaler | |
| ES486395A1 (es) | Sistema de seguridad | |
| GB1522534A (en) | Ground-fault detection system | |
| KR890015607A (ko) | 주파수 검출기 | |
| ES459217A1 (es) | Un circuito receptor de via controlado en fase. | |
| SE7710752L (sv) | Forfarande och anordning for overvakning av en elektrisk ledning med avseende pa kortslutningar | |
| GB1507434A (en) | Suppression of interfering signals in an electric measurand transmitter | |
| GB1212039A (en) | Boundary value voltage or current sensors | |
| ES459130A1 (es) | Una disposicion de recepcion para un sistema de alta fre- cuencia de deteccion de la intrusion. | |
| JPS5566725A (en) | Temperature detector | |
| SU813795A2 (ru) | Устройство контрол исправности коль-цА фАзОВОй АВТОпОдСТРОйКи чАСТОТы | |
| GB1020375A (en) | Improvements in synchronous detection circuits | |
| JPS5717236A (en) | Detector for synchronism | |
| JPS52132649A (en) | Bus anomaly detecting circuit | |
| JPS537165A (en) | Synchronism detecting circuit of phase control circuit | |
| SU693115A1 (ru) | Обнаружитель слабых сигналов | |
| SU613351A1 (ru) | Устройство дл сигнализации предельных значений контролируемых параметров | |
| SU873430A2 (ru) | Устройство дл контрол состо ни радиолиний | |
| JPS52106260A (en) | Skip detection circuit of signal reception system | |
| JPS5672357A (en) | Failure detector | |
| JPS538173A (en) | Peak point detection circuit | |
| JPS54143274A (en) | Frequency analyzer | |
| GB1373822A (en) | Improvements in and relating to temperature measurement |