Universal measurement data acquisition in water

Patent metadata

Field	Value
Publication number	US-9677922-B2
Application number	US-201414325063-A
Country	US
Kind code	B2
Filing date	Jul 7, 2014
Priority date	Jul 8, 2013
Publication date	Jun 13, 2017
Grant date	Jun 13, 2017

Abstract

In order to determine a level and the flow speed of a medium, FMCW transmission signals and CW transmission signals are emitted alternately. Using the Doppler effect, the flow speed of the medium can be determined from the reflected CW signal. The level is determined from the reflected FMCW signal.

First claim

The invention claimed is:

1. A fill level measurement device for determining a distance from a medium and a flow speed of the medium by evaluating a transmission signal emitted by the fill level measurement device and reflected by the medium, comprising:
a signal generator module generating the transmission signal, which has an amplitude modulation or a frequency modulation during a first time interval and which has no modulation during a second time interval;
an antenna arrangement emitting the transmission signal in a first direction oblique to the flow direction of the medium; and
a processor unit determining the distance from the medium and the flow speed of the medium by evaluating the transmission signal reflected by the medium and received by the antenna arrangement,
wherein the antenna arrangement is configured to emit the transmission signal in a second direction which is perpendicular to the flow direction of the medium.

2. The fill level measuring device according to claim 1 , wherein the antenna arrangement is a single antenna having two or more radiation directions.

3. The fill level measuring device according to claim 1 , wherein the antenna arrangement comprises a first antenna and a second antenna, wherein the first antenna is configured to emit the transmission signal in the first direction and the second antenna is configured to emit the transmission signal in the second direction.

4. The fill level measurement device according to claim 3 , wherein the two antennas are both connected to the signal generator module via a directional coupler, a switch or a power splitter.

5. The fill level measurement device according to claim 1 , wherein the antenna arrangement comprises a planar antenna array.

6. The fill level measurement device according to claim 1 , wherein the signal generator module is an FMCW module, which generates the frequency-modulated transmission signal in the form of an FMCW signal during the first time interval, and which generates the unmodulated transmission signal in the form of a CW signal during the second time interval.

7. The fill level measurement device according to claim 6 , wherein the fill level measurement device is configured to transmit the transmission signal only in the first direction during the first time interval and to transmit the transmission signal only in the second direction during the second time interval.

8. The fill level measurement device according to claim 1 , wherein the processor unit is configured to determine the distance from the medium and the flow speed of the medium within a single measurement cycle.

9. The fill level measurement device according to claim 1 , wherein the fill level measuring device is a fill level radar.

10. The fill level measurement device according to claim 1 , wherein the fill level measuring device is a 2-wire line sensor.

11. A method for determining a distance from a medium and a flow speed of the medium by evaluating a transmission signal emitted by a measurement device and reflected by the medium, comprising:
generating a transmission signal which has an amplitude modulation or a frequency modulation during a first time interval and which has no modulation during a second time interval;
emitting the transmission signal in a first direction oblique to the flow direction of the medium; and
determining the distance from the medium and the flow speed of the medium by evaluating the transmission signal reflected by the medium and received by the antenna arrangement,
wherein the antenna arrangement is configured to emit the transmission signal in a second direction which is perpendicular to the flow direction of the medium.

12. A non-transitory computer-readable medium on which a program element is stored which, when executed on a processor unit of a fill level measurement device, causes the fill level measurement device to carry out the steps according to claim 11 .

Assignees

• Grieshaber Vega Kg

Inventors

• Skowaisa Juergen

Classifications

• G01P5/242

  involving continuous, e.g. modulated or unmodulated, waves (G01P5/244 takes precedence) · CPC title

• G01S13/583

  using transmission of continuous unmodulated waves, amplitude-, frequency-, or phase-modulated waves and based upon the Doppler effect resulting from movement of targets · CPC title

• G01S13/87

  Combinations of radar systems, e.g. primary radar and secondary radar · CPC title

• G01S13/88

  Radar or analogous systems specially adapted for specific applications (electromagnetic prospecting or detecting of objects, e.g. near-field detection, G01V3/00) · CPC title

• G01S13/34 Primary

  using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal · CPC title