IT1086773B - Perfezionamento nei sistemi di allarme antifurto - Google Patents
Perfezionamento nei sistemi di allarme antifurtoInfo
- Publication number
- IT1086773B IT1086773B IT4779377A IT4779377A IT1086773B IT 1086773 B IT1086773 B IT 1086773B IT 4779377 A IT4779377 A IT 4779377A IT 4779377 A IT4779377 A IT 4779377A IT 1086773 B IT1086773 B IT 1086773B
- Authority
- IT
- Italy
- Prior art keywords
- improvement
- burglar alarm
- alarm systems
- systems
- burglar
- Prior art date
Links
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
- G08B13/1618—Actuation by interference with mechanical vibrations in air or other fluid using active vibration detection systems using ultrasonic detection means
- G08B13/1627—Actuation by interference with mechanical vibrations in air or other fluid using active vibration detection systems using ultrasonic detection means using Doppler shift detection circuits
-
- 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
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/50—Systems of measurement based on relative movement of target
- G01S13/52—Discriminating between fixed and moving objects or between objects moving at different speeds
- G01S13/56—Discriminating between fixed and moving objects or between objects moving at different speeds for presence detection
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Burglar Alarm Systems (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/652,049 US4035798A (en) | 1974-03-27 | 1976-01-26 | Ultrasonic intrusion detection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| IT1086773B true IT1086773B (it) | 1985-05-31 |
Family
ID=24615317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT4779377A IT1086773B (it) | 1976-01-26 | 1977-01-25 | Perfezionamento nei sistemi di allarme antifurto |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS5291700A (it) |
| AU (1) | AU498606B2 (it) |
| IT (1) | IT1086773B (it) |
| NL (1) | NL7700414A (it) |
-
1977
- 1977-01-17 NL NL7700414A patent/NL7700414A/xx not_active Application Discontinuation
- 1977-01-25 AU AU21609/77A patent/AU498606B2/en not_active Expired
- 1977-01-25 IT IT4779377A patent/IT1086773B/it active
- 1977-01-26 JP JP687177A patent/JPS5291700A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| NL7700414A (nl) | 1977-07-28 |
| AU498606B2 (en) | 1979-03-15 |
| JPS5291700A (en) | 1977-08-02 |
| AU2160977A (en) | 1978-08-03 |
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