Presence detector housing and mount
US5210406A · kind A · utility
24Cited by
5References
19Claims
0Family size
Inventors
Key dates
| Filing date | Jun 10, 1991 |
| Grant date | May 11, 1993 |
| Priority date | — |
| Expiry date | Jun 10, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V8/20
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Presence detecting apparatus and housing and mounts therefore are disclosed, the apparatus including control circuitry, an emitter array, detector array, and background compensation sensor mounted and housed to provide a safe and effective detection area characterized by substantially constant detection sensitivity over the defined detection area while avoiding undesired detection of objects present outside the detection area. The emitter array and detector array are mounted and housed so that the detector array is substantially isolated from transmission in the housing of selected electromagnetic signals from the emitter array.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.