Distance-measuring device of measuring distance according to variation of imaging location and calibrating method thereof
US8514375B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 23, 2010 |
| Grant date | Aug 20, 2013 |
| Priority date | — |
| Expiry date | May 15, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C3/085
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A distance-measuring device is utilized for measuring a measured distance between a measured object and the distance-measuring device. The distance-measuring device reduces the effect of a background light and a flicking light by removing the part corresponding to the background light and the flicking light from light-sensed signals generated by an image sensor of the distance-measuring device. In addition, the distance-measuring device calculates a calibrating parameter for calibrating an assemble-error angle of the distance-measuring device, according to an imaging location of a reflective light obtained by measuring a calibrating object with a predetermined distance. In this way, the distance-measuring device can correctly calculate out the measured distance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.