Passenger number sensor system
US5068537A · kind A · utility
14Cited by
2References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 14, 1991 |
| Grant date | Nov 26, 1991 |
| Priority date | — |
| Expiry date | Mar 14, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C9/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A passenger-number sensor system wherein a plurality of infrared ray sensors are disposed on a straight line to detect temperature changes in their light reception zones, a plurality of optical lenses are provided one for each of the plurality of infrared ray sensors, and a counter is provided to select one of the addition values in a predetermined range according to a sense pattern based on the temperature changes of the infrared ray sensors and add the selected addition value to a so-far accumulated count value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.