IT1053395B - IMPROVEMENT IN ULTRASONIC ALARM SYSTEMS FOR THE DETECTION OF INSTRUCTIONS - Google Patents
IMPROVEMENT IN ULTRASONIC ALARM SYSTEMS FOR THE DETECTION OF INSTRUCTIONSInfo
- Publication number
- IT1053395B IT1053395B IT4771576A IT4771576A IT1053395B IT 1053395 B IT1053395 B IT 1053395B IT 4771576 A IT4771576 A IT 4771576A IT 4771576 A IT4771576 A IT 4771576A IT 1053395 B IT1053395 B IT 1053395B
- Authority
- IT
- Italy
- Prior art keywords
- instructions
- improvement
- detection
- alarm systems
- ultrasonic alarm
- 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
-
- 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
- G01S15/523—Discriminating between fixed and moving objects or between objects moving at different speeds for presence detection
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Computer Networks & Wireless Communication (AREA)
- Burglar Alarm Systems (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/542,695 US3986182A (en) | 1974-03-27 | 1975-01-21 | Multi-zone intrusion detection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| IT1053395B true IT1053395B (en) | 1981-08-31 |
Family
ID=24164901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT4771576A IT1053395B (en) | 1975-01-21 | 1976-01-20 | IMPROVEMENT IN ULTRASONIC ALARM SYSTEMS FOR THE DETECTION OF INSTRUCTIONS |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS5197397A (en) |
| AU (1) | AU502566B2 (en) |
| CA (1) | CA1050652A (en) |
| DE (1) | DE2600362A1 (en) |
| FR (1) | FR2298839A1 (en) |
| GB (1) | GB1511461A (en) |
| IT (1) | IT1053395B (en) |
| NL (1) | NL7600175A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0010870A1 (en) * | 1978-10-04 | 1980-05-14 | Glynwed Group Services Limited | Electronic lock and key, and an alarm system incorporating same |
| DE3428773A1 (en) * | 1984-08-03 | 1986-02-13 | Siemens AG, 1000 Berlin und 8000 München | ULTRASONIC PROXIMITY INITIATOR |
| GB2179481B (en) * | 1985-08-20 | 1989-08-02 | Rentokil Ltd | Pest detection apparatus and method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3680074A (en) * | 1969-11-03 | 1972-07-25 | Zeev Lieser | Intrusion systems employing digital processing circuitry |
| US3781859A (en) * | 1972-04-19 | 1973-12-25 | Seabroad Electric | Controlled wave pattern ultrasonic burglar alarm |
-
1976
- 1976-01-06 CA CA243,016A patent/CA1050652A/en not_active Expired
- 1976-01-07 DE DE19762600362 patent/DE2600362A1/en not_active Withdrawn
- 1976-01-09 NL NL7600175A patent/NL7600175A/en not_active Application Discontinuation
- 1976-01-12 GB GB100876A patent/GB1511461A/en not_active Expired
- 1976-01-16 FR FR7601124A patent/FR2298839A1/en active Granted
- 1976-01-16 JP JP51003275A patent/JPS5197397A/ja active Pending
- 1976-01-20 IT IT4771576A patent/IT1053395B/en active
- 1976-03-16 AU AU12059/76A patent/AU502566B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB1511461A (en) | 1978-05-17 |
| JPS5197397A (en) | 1976-08-26 |
| CA1050652A (en) | 1979-03-13 |
| DE2600362A1 (en) | 1976-07-22 |
| AU1205976A (en) | 1977-09-22 |
| NL7600175A (en) | 1976-07-23 |
| FR2298839A1 (en) | 1976-08-20 |
| FR2298839B1 (en) | 1980-05-30 |
| AU502566B2 (en) | 1979-08-02 |
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