Method for identifying a change of a range of a lidar sensor
US12019191B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2021 |
| Grant date | Jun 25, 2024 |
| Priority date | — |
| Expiry date | Jul 28, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/931
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for identifying a change of a range of a lidar sensor involves a lidar sensor receiving a reference noise level of infrared radiation. A signal-to-noise ratio of infrared radiation reflected on the reference target and received by the lidar sensor are identified in a reference measurement having a reference target located at a predetermined distance to the lidar sensor. In a driving operation measurement, a current noise level of received infrared radiation is identified and a theoretical distance to a position where the reference target ought to be if, at the current noise level, the same signal-to-noise ratio applies as in the reference measurement is identified from the current noise level. A change in range calculation identifies a difference between the predetermined distance and the theoretical distance. The difference corresponds to the change of the range of the lidar sensor compared to its range during the reference measurement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.