FR2402908A1 - Multichannel anti-intruder surveillance system - has ultrasonic surveillance device coupled to supply via switch controlled by hyperfrequency device - Google Patents
Multichannel anti-intruder surveillance system - has ultrasonic surveillance device coupled to supply via switch controlled by hyperfrequency deviceInfo
- Publication number
- FR2402908A1 FR2402908A1 FR7727597A FR7727597A FR2402908A1 FR 2402908 A1 FR2402908 A1 FR 2402908A1 FR 7727597 A FR7727597 A FR 7727597A FR 7727597 A FR7727597 A FR 7727597A FR 2402908 A1 FR2402908 A1 FR 2402908A1
- Authority
- FR
- France
- Prior art keywords
- surveillance
- devices
- supply via
- hyperfrequency
- ultrasonic
- 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.)
- Granted
Links
- 230000003213 activating effect Effects 0.000 abstract 1
- 238000012544 monitoring process Methods 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/16—Actuation by interference with mechanical vibrations in air or other fluid
- G08B13/1609—Actuation by interference with mechanical vibrations in air or other fluid using active vibration detection systems
- G08B13/1645—Actuation by interference with mechanical vibrations in air or other fluid using active vibration detection systems using ultrasonic detection means and other detection means, e.g. microwave or infrared radiation
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/22—Electrical actuation
- G08B13/24—Electrical actuation by interference with electromagnetic field distribution
- G08B13/2491—Intrusion detection systems, i.e. where the body of an intruder causes the interference with the electromagnetic field
- G08B13/2494—Intrusion detection systems, i.e. where the body of an intruder causes the interference with the electromagnetic field by interference with electro-magnetic field distribution combined with other electrical sensor means, e.g. microwave detectors combined with other sensor means
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Burglar Alarm Systems (AREA)
Abstract
The surveillance system uses at least two surveillance devices, each covering the whole of the surveillance zone or all the possible exits for the latter, the two devices monitoring different physical parameters. The surveillance devices are coupled to a coincidence circuit (18) for activating the alarm only if all the devices are activated for a short time period. One of the surveillance devices is coupled to the supply via a switch (30) controlled by a further device. The first surveillance device is only connected to the supply when the second surveillance device is energised. Pref. the surveillance system uses ultrasonic (2, 4, 6, 8) and hyperfrequency (10, 12, 14, 16) surveillance devices.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7727597A FR2402908A1 (en) | 1977-09-13 | 1977-09-13 | Multichannel anti-intruder surveillance system - has ultrasonic surveillance device coupled to supply via switch controlled by hyperfrequency device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7727597A FR2402908A1 (en) | 1977-09-13 | 1977-09-13 | Multichannel anti-intruder surveillance system - has ultrasonic surveillance device coupled to supply via switch controlled by hyperfrequency device |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2402908A1 true FR2402908A1 (en) | 1979-04-06 |
FR2402908B1 FR2402908B1 (en) | 1982-02-19 |
Family
ID=9195325
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7727597A Granted FR2402908A1 (en) | 1977-09-13 | 1977-09-13 | Multichannel anti-intruder surveillance system - has ultrasonic surveillance device coupled to supply via switch controlled by hyperfrequency device |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2402908A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2611957A1 (en) * | 1987-03-04 | 1988-09-09 | Dreuilhe Jacqueline | Dual-volumetric DOPPLER-effect movement-detecting radar |
-
1977
- 1977-09-13 FR FR7727597A patent/FR2402908A1/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2611957A1 (en) * | 1987-03-04 | 1988-09-09 | Dreuilhe Jacqueline | Dual-volumetric DOPPLER-effect movement-detecting radar |
Also Published As
Publication number | Publication date |
---|---|
FR2402908B1 (en) | 1982-02-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
ZA732953B (en) | Three phase system monitoring and control circuit | |
FR2470384B1 (en) | PLASMIC PROCESS MONITORING AND CONTROLLING DEVICE | |
FR2656182B1 (en) | INFRARED MONITORING DEVICE. | |
SE8902508D0 (en) | SETTING AND MONITORING FOR MONITORING OF COMPUTER CONTROLS | |
FR2402908A1 (en) | Multichannel anti-intruder surveillance system - has ultrasonic surveillance device coupled to supply via switch controlled by hyperfrequency device | |
JPS5333099A (en) | Alarm device | |
JPS5465404A (en) | Identifying circuit for dial-in pulse signal and calling signal of telephone set | |
JPS5251896A (en) | Remote central control apparatus | |
UA2102A1 (en) | Device for signaling rate of rotation of shaft | |
JPS57104882A (en) | Power on clear circuit in electronic watch | |
GB1376636A (en) | Installation for monitoring several persons or objects | |
FR2394858A1 (en) | Self-contained burglar alarm system - includes impact detector and door opening detector mounted in small case fixed to door | |
JPS56103386A (en) | Clock supplying system | |
FR2243480A1 (en) | Surveillance intruder alarm alerting local police - has control clock for setting operative and access periods | |
JPS5360551A (en) | Trouble checking device of clock pulse dividing circuit | |
FR2319944A1 (en) | Alarm circuits group control system - puts all other members into continuous alarm mode while triggering circuit retains intermittent alarm | |
JPS5479668A (en) | Alarm watch | |
FR2222707A1 (en) | Bank cashier alarm system - operates automatically as cashier raises his arm | |
JPS5416084A (en) | Emergency reporting and contacting system in remote concentrated supervising control device | |
JPS5735784A (en) | Kitchen timer | |
JPS52106603A (en) | Oscillation circuit for remote control | |
JPS5421215A (en) | Power monitor | |
JPS5325785A (en) | Remote supervisary controller | |
FR2301886A1 (en) | Burglar alarm system using activation by remote signalling - operates gating circuit controlling warning devices | |
FR2345771A1 (en) | Remote detector alarm signalling system - has central control supplying energy to storage circuits in detectors for re-transmission when alarm is detected |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |