Method for calibrating and/or monitoring FMCW radar filling level measuring device

A technology for level measurement and equipment, which is used in testing/calibration devices, mechanical equipment, measuring devices, etc., and can solve problems such as decreased measurement accuracy

Active Publication Date: 2014-01-08
EHNDRESS KHAUZER GMBKH KO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, there are many events, factors and / or environmental conditions that can lead to a reduction in the measurement accuracy of these level measuring devices

Method used

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  • Method for calibrating and/or monitoring FMCW radar filling level measuring device
  • Method for calibrating and/or monitoring FMCW radar filling level measuring device
  • Method for calibrating and/or monitoring FMCW radar filling level measuring device

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Experimental program
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Embodiment Construction

[0038] figure 1 Shows a block diagram of a coherent frequency modulated continuous wave radar level measurement equipment (FMCW radar level measurement equipment) combined with a level measurement device.

[0039] The measuring device includes a container 3 containing a filling substance 1. The level measuring device is used to measure the level L of the filling material 1 in the container 3 in the measuring operation, and for this purpose, is installed on the upper container 3 of the filling material 1.

[0040] The level measuring device includes an antenna 5 directed at the filling material 1. The level measuring device uses a predetermined repetition frequency f R The transmission signal S having a predetermined transmission signal duration and frequency modulated by means of a predetermined linear modulation is continuously transmitted to the filling material 1 via the antenna 5.

[0041] The generation of the transmission signal S, such as in the case of a conventional FMCW rad...

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PUM

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Abstract

A method is based on measuring a distance to a reference reflector arranged at a known distance, in order to calibrate and / or monitor a coherent frequency modulation, continuous wave radar, fill-level measuring device, wherein the reference reflector can be reliably identified. To this end, a reference reflector executing oscillations toward the fill-level measuring device with an oscillation frequency is used, which is inserted in the beam path of periodically linearly frequency modulated transmission signals transmitted from the fill-level measuring device. The fill-level measuring device receives fractions of the transmission signals reflected back on reflectors in the container and records based on these received signals and their time correlation relative to the respectively associated transmission signal for each received signal an echo function, which shows the amplitudes of the received signal as a function of the associated position of the associated reflector. Based on the time change of a plurality of sequentially recorded echo functions and the oscillation frequency of the reference reflector, the position of the reference reflector in the echo functions is identified and its reference reflector position determined.

Description

Technical field [0001] The present invention relates to a calibration and / or monitoring method for coherent frequency modulated continuous wave radar level measurement equipment (FMCW radar level measurement equipment), wherein the level measurement equipment transmits to a filling material with a predetermined repetition frequency by means of a predetermined The part of the transmission signal that is reflected on the reflector in the beam path of the transmission signal back to the level measurement equipment is received as the reception signal; insert the reference reflector in the transmission signal The beam path is above the filling material at a known distance from the level measuring device; based on the time correlation of the received signals and their respective associated transmitted signals with respect to each received signal, the echo function is recorded, the echo The function expresses the amplitude of the received signal as the frequency difference of the recei...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F23/284G01F25/00
CPCG01F25/0076G01F25/0061G01F23/284G01F25/24G01F25/20
Inventor 温弗里德·迈尔曼弗雷德·埃克特
Owner EHNDRESS KHAUZER GMBKH KO KG
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