Self-diagnosing FMCW radar level gauge
US9541444B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 1, 2014 |
| Grant date | Jan 10, 2017 |
| Priority date | — |
| Expiry date | Mar 7, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/4078
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A self-diagnosing FMCW radar level gauge and a method for providing self-diagnosing with a radar level gauge is provided in a radar level gauge comprising a transceiver, a mixer, a signal propagating device and a signal propagation path connecting the transceiver and the signal propagating device, a filter arrangement and processing circuitry. The filter arrangement provides a filtered intermediate frequency signal. The transceiver outputs either a diagnostic sweep configured such that a reference echo from the signal propagation path is detectable in said filtered intermediate frequency signal, or a measurement sweep configured such that the reference echo is suppressed in the filtered intermediate frequency signal and that a surface echo is detectable. The processing circuitry is configured to self-diagnose the radar level gauge based on the reference echo, and to determine the distance to the surface based on the surface echo.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.