ES428528A1 - Intrusion detection system - Google Patents
Intrusion detection systemInfo
- Publication number
- ES428528A1 ES428528A1 ES428528A ES428528A ES428528A1 ES 428528 A1 ES428528 A1 ES 428528A1 ES 428528 A ES428528 A ES 428528A ES 428528 A ES428528 A ES 428528A ES 428528 A1 ES428528 A1 ES 428528A1
- Authority
- ES
- Spain
- Prior art keywords
- conductive member
- wire
- frequency component
- attributable
- combination
- 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
- 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)
- Geophysics And Detection Of Objects (AREA)
- Switches That Are Operated By Magnetic Or Electric Fields (AREA)
Abstract
A wire comprised of an electrical conductor enclosed within insulation, is loosely positioned relative to an electrically conductive member. This combination is positioned to monitor disturbances caused by the intrusion of the protected area. The relative movement of the wire and the electrically conductive member caused by intrusion disturbances produces an electrical signal which is attributable to a capacitance change. The signal can be realized from either the electret characteristic of the wire or it can be realized by the application of a d-c bias voltage to the combination. A signal developed by the combination in response to a mechanical disturbance includes a low frequency and a high frequency component. The low frequency component, attributable to a "strain mode" of operation, developed by the displacement of the wire relative to the electrically conductive member by mechanical deflection of the conductive member whereas the high frequency component, attributable to an "acceleration mode" of operation, results from the vibration of the wire relative to the conductive member. The high frequency component code is comparable to a "ringing" condition much the same as is experienced by an accelerometer.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US00382264A US3846780A (en) | 1973-07-24 | 1973-07-24 | Intrusion detection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES428528A1 true ES428528A1 (en) | 1976-08-16 |
Family
ID=23508197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES428528A Expired ES428528A1 (en) | 1973-07-24 | 1974-07-23 | Intrusion detection system |
Country Status (10)
| Country | Link |
|---|---|
| US (2) | US3846780A (en) |
| JP (1) | JPS5248079B2 (en) |
| BE (1) | BE817967A (en) |
| CA (1) | CA1012225A (en) |
| DE (1) | DE2435444A1 (en) |
| ES (1) | ES428528A1 (en) |
| FR (1) | FR2238980B1 (en) |
| GB (1) | GB1456102A (en) |
| NL (1) | NL7408923A (en) |
| TR (1) | TR18071A (en) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4047166A (en) * | 1976-01-26 | 1977-09-06 | Gte Sylvania Incorporated | Electrostatically charged cable transducer |
| FR2391519A1 (en) * | 1977-05-16 | 1978-12-15 | App Automatiques Ste Fse | Discriminating presence of detector with alarm system - is in form of rubber foam mat incorporating separated conducting sheets |
| JPS578179Y2 (en) * | 1977-09-27 | 1982-02-17 | ||
| US4236109A (en) * | 1977-12-12 | 1980-11-25 | Lockheed Corporation | Dielectric monitored composite assembly |
| US4197529A (en) * | 1978-02-17 | 1980-04-08 | The United States Of America As Represented By The Secretary Of The Navy | Intrusion detection apparatus |
| US4237421A (en) * | 1978-10-19 | 1980-12-02 | General Electric Company | Single-electrode capacitance touchpad sensor systems |
| IL66040A (en) * | 1982-06-11 | 1987-12-20 | Beta Eng & Dev Ltd | Intrusion detection system |
| IT1229151B (en) * | 1989-04-07 | 1991-07-22 | Hesa Spa | ALARM OR SIGNALING DEVICE WHOSE SENSOR ELEMENT IS CONSTITUTED BY A SHIELDED POLARIZED CURRENT COAXIAL CABLE |
| US4994793A (en) * | 1989-12-08 | 1991-02-19 | Kevin Curtis | Weight shift detector |
| US5705984A (en) * | 1996-05-10 | 1998-01-06 | The United States Of America As Represented By The Secretary Of The Navy | Passive intrusion detection system |
| US6025782A (en) | 1996-09-04 | 2000-02-15 | Newham; Paul | Device for monitoring the presence of a person using proximity induced dielectric shift sensing |
| DE20301907U1 (en) | 2003-02-07 | 2003-04-30 | Wintjens, Rüdiger, 47533 Kleve | Synthesiser controlled infra red laser security system with 4D barrier and point matrix display |
| US6967584B2 (en) * | 2003-07-28 | 2005-11-22 | Senstar-Stellar Corporation | Integrated sensor cable for ranging |
| FR2863395B1 (en) * | 2003-12-04 | 2006-04-21 | Internat Pool Safety And Light | BARRIER HAVING A CROSS CONSTRAINT DETECTION DEVICE |
| US7479878B2 (en) * | 2004-07-28 | 2009-01-20 | Senstar-Stellar Corporation | Triboelectric, ranging, or dual use security sensor cable and method of manufacturing same |
| FR2876481B1 (en) * | 2004-10-13 | 2007-01-19 | Atral Soc Par Actions Simplifi | ALARM SYSTEM EQUIPPED WITH A SHORT-CIRCUIT DETECTOR |
| US7881882B2 (en) * | 2006-09-25 | 2011-02-01 | Ut-Battelle, Llc | Apparatus and method for detecting tampering in flexible structures |
| ITBA20090007A1 (en) * | 2009-02-03 | 2009-05-05 | Rocco Carone | CAPACITIVE SENSOR OF PRESENCE FOR ANTI-INTRUSION AND COMMAND |
| JP5568993B2 (en) * | 2010-01-08 | 2014-08-13 | オムロン株式会社 | Static induction generator |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2649579A (en) * | 1950-02-01 | 1953-08-18 | Standard Oil Dev Co | Detector for seismic exploration |
| US2837082A (en) * | 1954-03-18 | 1958-06-03 | Elliott Robert Vincent | Accelerometer |
| US2787784A (en) * | 1954-04-30 | 1957-04-02 | Harold T Meryman | Triboelectric detecting system |
| US2965877A (en) * | 1957-06-10 | 1960-12-20 | James H Stein | Capacitive-type line hydrophone |
| US3109165A (en) * | 1958-09-05 | 1963-10-29 | Specialties Dev Corp | Intruder detecting system |
| US3889230A (en) * | 1966-09-02 | 1975-06-10 | Woods Hole Oceanographic Inst | Capacitive transducer and method of using the same |
| GB1209506A (en) | 1968-03-18 | 1970-10-21 | Marconi Co Ltd | Improvements in or relating to vibration detectors |
| GB1278249A (en) | 1968-12-10 | 1972-06-21 | Marconi Co Ltd | Improvements in or relating to vibration detectors |
| US3763482A (en) * | 1971-02-01 | 1973-10-02 | Gte Sylvania Inc | Coaxial cable transducer |
| US3750127A (en) * | 1971-10-28 | 1973-07-31 | Gen Dynamics Corp | Method and means for sensing strain with a piezoelectric strain sensing element |
-
1973
- 1973-07-24 US US00382264A patent/US3846780A/en not_active Expired - Lifetime
-
1974
- 1974-06-25 CA CA203,307A patent/CA1012225A/en not_active Expired
- 1974-07-02 NL NL7408923A patent/NL7408923A/en not_active Application Discontinuation
- 1974-07-17 GB GB3157574A patent/GB1456102A/en not_active Expired
- 1974-07-22 TR TR18071A patent/TR18071A/en unknown
- 1974-07-23 DE DE2435444A patent/DE2435444A1/en not_active Withdrawn
- 1974-07-23 BE BE1006088A patent/BE817967A/en unknown
- 1974-07-23 ES ES428528A patent/ES428528A1/en not_active Expired
- 1974-07-24 FR FR7425749A patent/FR2238980B1/fr not_active Expired
- 1974-07-24 JP JP49084265A patent/JPS5248079B2/ja not_active Expired
-
1976
- 1976-09-01 US US05/719,500 patent/USRE29896E/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE2435444A1 (en) | 1975-02-13 |
| FR2238980A1 (en) | 1975-02-21 |
| FR2238980B1 (en) | 1978-12-08 |
| TR18071A (en) | 1976-09-21 |
| USRE29896E (en) | 1979-01-30 |
| CA1012225A (en) | 1977-06-14 |
| JPS5248079B2 (en) | 1977-12-07 |
| BE817967A (en) | 1975-01-23 |
| US3846780A (en) | 1974-11-05 |
| NL7408923A (en) | 1975-01-28 |
| GB1456102A (en) | 1976-11-17 |
| JPS5044794A (en) | 1975-04-22 |
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