Pixel domain field calibration of triangulation sensors
US12111397B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 19, 2021 |
| Grant date | Oct 8, 2024 |
| Priority date | — |
| Expiry date | May 9, 2043 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65G2203/044
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus and associated methods relate to a field-adjustable distance sensor configured to translate a transfer function of the sensor by a substantially constant value in a position domain by calibration at one or more known distances. In an illustrative example, the transfer function may correlate multiple distances to corresponding position vectors describing a position of a light signal on a receiver. The receiver may, for example, generate a detection signal corresponding to a position on the receiver of a light signal reflected off a target. A control circuit may, for example, generate a position vector in response to the detection signal. A calibration constant (C) may be generated, for example, as a function of a known distance of the target and position vector. C may be applied, for example, to translate the transfer function in the position domain. Various embodiments may advantageously reduce non-linear error in a distance sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.