Method for FMCW-based distance measurement
US11977145B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 17, 2019 |
| Grant date | May 7, 2024 |
| Priority date | — |
| Expiry date | Mar 30, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/352
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed is a method and a corresponding distance-measuring device for measuring a distance to an object using FMCW radar. The method includes the frequency-dependent determination of the amplitude of the radar signal, i.e. the frequency response in the output path and in the input path of the distance-measuring device. The standard windowing of the evaluation signal can be corrected using a correction factor dependent on the frequency responses. Thus the frequency dependence of the radar signal is compensated independently of device-internal or external interferences by adapting the window function. The result is more accurate and reliable distance measurement using FMCW radar. Because the distance can be determined by the disclosed method very accurately and without distortion, it is advantageous to use the distance-measuring device as a fill-level measuring device to measure the fill level of a filling material in a container.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.