Time-of-flight distance measuring device and method for detecting multipath error
US11307296B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 8, 2016 |
| Grant date | Apr 19, 2022 |
| Priority date | — |
| Expiry date | Jul 17, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/931
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present disclosure relates to a time-of-flight distance measuring device. The light source (24) includes a plurality of emitting portions (70, 72), each of which illuminates a respective one of the sub-regions (R1, R2). The light receiver (26) includes a plurality of receiving portions (74, 76) corresponding to respective ones of the emitting portions (70, 72). The first controller (28) controls (i) a first emitting portion (70) to emit the emitted light including an Nth-order harmonic component of a fundamental frequency and (ii) a second emitting portion (72) to emit the emitted light including an Mth-order harmonic component. The second controller (30) controls a particular receiving portion (74) corresponding to the first emitting portion (70) to be sensible to the Nth-order Mth-order harmonic components. The multipath detector (82) detects occurrence of the multipath error when the particular receiving portion (74) senses both the Nth-order and Mth-order components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.