Level measuring device operating with microwaves
US6734819B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 7, 2002 |
| Grant date | May 11, 2004 |
| Priority date | — |
| Expiry date | Feb 7, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/2886
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The microwave measuring device, which preferably operates with microwave bursts, serves to produce a measured value (XH) representing the level of the contents of a vessel (200). It comprises a transceiver unit (2) for generating a level-dependent intermediate-frequency signal (ZF) by means of a transmit signal (S2) and a receive signal (E2), and a transducer element (1) which in operation couples waves (S1), particularly pulsed waves, into the vessel under control of the transmit signal (S2) and converts echo waves (E1) reflected from the contents (201) of the vessel into the receive signal (E2). The intermediate-frequency signal (ZF) is fed to a control unit (3) of the level measuring device where it is stored in the form of a sampling sequence (AF) in a volatile data memory (33). In this manner, both amplitude information and phase information is available for the level measurement. The device is thus capable of measuring level with high accuracy, particularly accurately to a millimeter, and very fast.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.