Sensor system
US5579009A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 22, 1994 |
| Grant date | Nov 26, 1996 |
| Priority date | — |
| Expiry date | Sep 22, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF42C13/02
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A sensor system comprises a plurality of sensor stations of the same type for surveillance of an area intended to include an object to be protected, the sensor stations being distributed essentially along the periphery of a circle, in the central part of which an object to be protected is intended to be contained. Each sensor station includes a detector unit which is arranged to scan an arc in an azimuth sector of the circle allocated to it up towards the background of the sky in each of two detection fields formed along the arc having different elevation angles with respect to the detector unit. The time of the passage of a target between the two detection fields is measured, and the target position is calculated relative to the sensor station on the basis of the measured time, the speed of the target, the angle between the detection fields and the angle to the target.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.