Laser apparatus and method for speed measurement
US6188469A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 28, 1999 |
| Grant date | Feb 13, 2001 |
| Priority date | — |
| Expiry date | May 28, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P3/68
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for measuring the speed of an object includes a first laser source for emitting a first laser plane at an intended path, and a second laser source for emitting a second laser plane at the intended path, with the second laser source positioned from the first laser source at a known distance. The apparatus further includes a detector system positioned to receive a first laser light and a second laser light that have been reflected from the first laser plane and the second laser plane, respectively, upon reflection of the first and second laser planes off the object. The detector system generates a first pulse signal and a second pulse signal, respectively, in response to the receipt of the first and second laser lights, respectively. The apparatus also includes a signal processing circuit coupled to the detector system for calculating the speed of an object passing through the intended path based on the first and second pulse signals generated by the detector system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.