Tailgate detection using infra-red beams
US9910187B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 16, 2016 |
| Grant date | Mar 6, 2018 |
| Priority date | — |
| Expiry date | Aug 16, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C9/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system, for calculating an object location within a portal, includes a portal map formed by a plurality of infra-red beams. The system further includes a broken beam detector for detecting and recording, in response to an object moving through the portal map, data indicative of one or more broken beams of the plurality of infra-red beams. The data includes first data indicative of an initial position of the object within the portal, second data indicative of a subsequent position of the object within the portal, and third data including one or more time records. The system also includes at least one broken beam analyzer for obtaining the data from the broken beam detector, the broken beam analyzer calculating the object location based on at least one of the first data, the second data, and the third data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.