FR2417149B1 - - Google Patents
Info
- Publication number
- FR2417149B1 FR2417149B1 FR7803510A FR7803510A FR2417149B1 FR 2417149 B1 FR2417149 B1 FR 2417149B1 FR 7803510 A FR7803510 A FR 7803510A FR 7803510 A FR7803510 A FR 7803510A FR 2417149 B1 FR2417149 B1 FR 2417149B1
- Authority
- FR
- France
- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
- G01S15/50—Systems of measurement, based on relative movement of the target
- G01S15/52—Discriminating between fixed and moving objects or between objects moving at different speeds
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- 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
- G08B13/1618—Actuation by interference with mechanical vibrations in air or other fluid using active vibration detection systems using ultrasonic detection means
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Acoustics & Sound (AREA)
- Computer Networks & Wireless Communication (AREA)
- Burglar Alarm Systems (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7803510A FR2417149A1 (fr) | 1978-02-08 | 1978-02-08 | Appareil de detection d'intrusion |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7803510A FR2417149A1 (fr) | 1978-02-08 | 1978-02-08 | Appareil de detection d'intrusion |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2417149A1 FR2417149A1 (fr) | 1979-09-07 |
FR2417149B1 true FR2417149B1 (US07321065-20080122-C00126.png) | 1984-06-01 |
Family
ID=9204349
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7803510A Granted FR2417149A1 (fr) | 1978-02-08 | 1978-02-08 | Appareil de detection d'intrusion |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2417149A1 (US07321065-20080122-C00126.png) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU1046388A (en) * | 1987-11-13 | 1989-06-01 | Sang-Rok Kim | Telephone alerting system |
US5337353A (en) * | 1992-04-01 | 1994-08-09 | At&T Bell Laboratories | Capacitive proximity sensors |
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1978
- 1978-02-08 FR FR7803510A patent/FR2417149A1/fr active Granted
Also Published As
Publication number | Publication date |
---|---|
FR2417149A1 (fr) | 1979-09-07 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |