Method and device for measuring distance
US8625081B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 17, 2009 |
| Grant date | Jan 7, 2014 |
| Priority date | — |
| Expiry date | May 15, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/497
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
There is provided an apparatus (300) for measuring a distance to a target (312), comprising: a transmitter (302) configured to transmit an optical pulse (310) towards the target (312), a receiver channel (304) configured to receive the optical pulse (310) reflected from the target (312), and a processor (306) configured to measure a time intervaf between the transmission and detection of the optical pulse (310) at a predefined amplitude threshold level (11OA, 110B), to determine a time domain parameter from the detected optical pulse (310) at one or more amplitude threshold levels (110A, 110B), to convert the time domain parameter value into a correction value by a conversion model; to correct a timing error in the measured time interval by the correction value, and to convert the error-corrected time interval into a distance to the target (312).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.