TOf distance sensor and method for operation thereof
US9377532B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 9, 2013 |
| Grant date | Jun 28, 2016 |
| Priority date | — |
| Expiry date | Sep 12, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/4865
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A TOF distance sensor is proposed, for measuring a distance from an object, comprising an electronics apparatus for generating a modulation signal and for generating four correlation signals, which are phase shifted with respect to one another and which have the same period as the modulation signal; a radiation source for emitting radiation, which is modulated by the modulation signal; a reception apparatus, which has a predetermined spatial relationship with respect to the radiation source, for receiving radiation reflected by the object; a correlation apparatus for correlating the received radiation or a corresponding variable with respectively one of the four correlation signals in order to form four corresponding correlation values; a difference-forming apparatus for forming two difference correlation values from the difference between respectively two of the correlation values; a calculation apparatus embodied to calculate the distance with a predetermined linear dependence on the two difference correlation values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.