Intrusion detecting device
US6943685B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 14, 2003 |
| Grant date | Sep 13, 2005 |
| Priority date | — |
| Expiry date | Feb 14, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/191
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
To provide an intrusion detecting device capable of generating one of different warnings in proper timing dependent on the behavior of an intruder entering an alert region to thereby browbeat the intruder effectively, the intrusion detecting device (1) includes a plurality of sensor units (8 and 9), a sound generating device (29) capable of generating first and second warnings different from each other one at a time, and a warning generating unit (23). The sensor units (8 and 9) have a plurality of alert areas (A1 to A4) defined from a site distant from and to another site near to a subject to be monitored for security purpose and operable to detect an intruder H entering any of the alert areas (A1 to A4). The warning generating unit (23) is operable to cause the sound generating device (29) to issue the first warning when detection is made by the sensor unit (8), and also to cause the sound generating device (29) to issue the second warning when detection is made by at least the sensor unit (9) during a first predetermined length of time T1 subsequent to the detection by such sensor unit (8).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.