Object detection method
US10293379B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 2017 |
| Grant date | May 21, 2019 |
| Priority date | — |
| Expiry date | Jun 26, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/8819
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An object detection method includes an electromagnetic radiation emitter, and an electromagnetic radiation detector on a first side of an inspection zone, a reflective background on a second side of the inspection zone and a controller operably connected to the emitter and the detector to measure/determine a first time of travel for emitted electromagnetic radiation waves/pulses to travel from the emitter, to the reflective background, and return to the detector, and to measure/determine a second time of travel for emitted electromagnetic radiation waves/pulses to travel from the emitter of electromagnetic radiation to objects of interest passing through the inspection zone along an unsupported path of travel and to be reflected to the electromagnetic radiation detector, and any determined time of travel which varies from the first time of travel is evidence there is an object within the inspection zone and between the emitter and the reflective background.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.