Alignment indicator for photoelectric sensors
US6285017A · kind A · utility
29Cited by
5References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 18, 1999 |
| Grant date | Sep 4, 2001 |
| Priority date | — |
| Expiry date | Jun 18, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/486
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A mechanism for indicating the degree of alignment of a photoelectric sensing system produces a pulse width modulated signal in response to the intensity of light received by the sensing system. That signal has pulses which occur at a fixed frequency, but which vary in duration in response to the received light intensity. The pulse width modulated signal drives an indicator, such as a sound or light emitter. With this technique, the output of the indicator is pulse width modulated to indicate the intensity of the received light and thus the degree of alignment of the sensing system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.