Method for operating a photoelectric barrier
US10969516B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 2018 |
| Grant date | Apr 6, 2021 |
| Priority date | — |
| Expiry date | Apr 11, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16P3/144
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for operating a photoelectric barrier as well as a photoelectric barrier with at least one first and one second optoelectronic machine guard. The first optoelectronic machine guard has a first transmitter and the second optoelectronic machine guard has a second transmitter and receiver unit. The transmitters of the first optoelectronic machine guard are successively activated during a run of a first cycle so as to emit a single light pulse, and the transmitters of the second optoelectronic machine guard are successively activated during a run of a second cycle so as to emit a single light pulse. The cycles occur substantially simultaneously.A duration of the first cycle is lengthened or shortened by the duration of a first phase offset ΔA and that the duration of the second cycle is lengthened or shortened by the duration of a second phase offset ΔB.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.