FR2417149A1 - Appareil de detection d'intrusion - Google Patents
Appareil de detection d'intrusionInfo
- Publication number
- FR2417149A1 FR2417149A1 FR7803510A FR7803510A FR2417149A1 FR 2417149 A1 FR2417149 A1 FR 2417149A1 FR 7803510 A FR7803510 A FR 7803510A FR 7803510 A FR7803510 A FR 7803510A FR 2417149 A1 FR2417149 A1 FR 2417149A1
- Authority
- FR
- France
- Prior art keywords
- detector
- doppler effect
- ultrasonic generator
- effect signal
- telephone receiver
- 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
Classifications
-
- 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
-
- 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
Abstract
Appareil de détection d'intrusion par réflexion d'ultrasons et utilisation de l'effet Doppler. Il comprend un générateur d'ultrasons, un détecteur d'ultrasons, un étage de détection de signaux dus à l'effet Doppler et un circuit d'alarme. Ces éléments sont montés dans le boîtier d'un poste téléphonique adapté et modifié pour remplir le rôle qui lui est imparti. L'invention est applicable à la surveillance de locaux déserts.
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 true FR2417149A1 (fr) | 1979-09-07 |
FR2417149B1 FR2417149B1 (fr) | 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 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1989004574A1 (fr) * | 1987-11-13 | 1989-05-18 | Kim Sang Rok | Systeme d'alarme telephonique |
US5337353A (en) * | 1992-04-01 | 1994-08-09 | At&T Bell Laboratories | Capacitive proximity sensors |
-
1978
- 1978-02-08 FR FR7803510A patent/FR2417149A1/fr active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1989004574A1 (fr) * | 1987-11-13 | 1989-05-18 | Kim Sang Rok | Systeme d'alarme telephonique |
US5337353A (en) * | 1992-04-01 | 1994-08-09 | At&T Bell Laboratories | Capacitive proximity sensors |
Also Published As
Publication number | Publication date |
---|---|
FR2417149B1 (fr) | 1984-06-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |