Method and device for the measurement of linear speeds without contact and without marking
US4312592A · kind A · utility
11Cited by
7References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 28, 1980 |
| Grant date | Jan 26, 1982 |
| Priority date | — |
| Expiry date | Feb 28, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P3/806
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
For continuous measurement of the linear speed of relative travel of an object 11 in front of a measuring device 10 two fixed zones 21,22 in the path of the object are illuminated by means of two parallel laser beams emitted by a single source 15, images of the two zones illuminated are formed upon one and the same transducer 17 the output signal from which is processed electronically by autocorrelation in order to determine the time of travel of a point on the object in going from one illuminated zone to the other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.