Laser-based speed measuring device
US5521696A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 20, 1994 |
| Grant date | May 28, 1996 |
| Priority date | — |
| Expiry date | Jul 20, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/86
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A laser speed detector is described which includes a laser rangefinder which determines the time-of-flight of an infrared laser pulse to a target and a microprocessor-based microcontroller. The device is small enough to be easily hand-held, and includes a trigger and a sighting scope for a user to visually select a target and to trigger operation of the device upon the selected target. The laser rangefinder includes self-calibrating interpolation circuitry, a digital logic-operated gate for reflected laser pulses in which both the "opening" and the "closing" of the gate can be selectably set by the microcontroller, and dual collimation of the outgoing laser pulse such that a minor portion of the outgoing laser pulse is sent to means for producing a timing reference signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.