Data processing method of sectional type coaxial guided wave radar liquid level meter
A guided wave radar and data processing technology, applied in liquid level indicators, radio wave measurement systems, liquid/fluid solid measurement, etc., can solve the problems of liquid level measurement interference, large measurement errors, false echoes at connections, etc. Achieve the effect of improving measurement accuracy and eliminating impedance discontinuity
Active Publication Date: 2021-07-13
AEROSPACE INFORMATION RES INST CAS
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Problems solved by technology
[0005] In the process of realizing the concept of the present disclosure, the inventors found that the characteristic impedance of the connection of each segment of the segmented coaxial probe is discontinuous with other parts, and false echoes will be generated at the connection, which will interfere with the liquid level measurement, resulting in The problem of large measurement errors
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[0049] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0050] The terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting of the present disclosure. The terms "comprising", "comprising", etc. used herein indicate the presence of stated features, steps, operations and / or components, but do not exclude the presence or addition of one or more other features, steps, operations or components.
[0051]All terms (including technical and scientific terms) used herein have the meaning commonly understood by one of ordinary skill in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted to have a meaning consistent with the context of this specification, and not be interpret...
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The invention discloses a data processing method of a sectional type guided wave radar liquid level meter. The method comprises the following steps: predicting a predicted value of the liquid level height in a target container during next measurement according to a measured liquid level value and a liquid level change speed value of the current liquid level height in the target container; calculating a first false echo signal in the first echo signal measured next time according to the predicted value and the length of each section of the wave guide rod; acquiring a first echo signal of the wave guide rod when the liquid in the target container is at the predicted liquid level height; calculating an initial measurement liquid level value of the predicted liquid level height according to the first echo signal and the first false echo signal; and performing Kalman filtering processing on the initial measurement liquid level value to obtain a measurement liquid level value of the predicted liquid level height. The invention further provides a data processing system of the sectional type guided wave radar liquid level meter, a storage medium and a computer program product.
Description
technical field [0001] The invention belongs to the technical field of FMCW radar liquid level gauge signal processing, and in particular relates to a data processing method, data processing system, storage medium and computer program product of a segmented guided wave radar liquid level gauge. Background technique [0002] The FMCW guided wave radar level gauge is a radar level gauge instrument based on the principle of frequency domain reflection (FDR). The frequency modulated continuous wave electromagnetic signal of the radar level gauge propagates along the guide rod. At this time, part of the signal of the radar level gauge is reflected to form an echo and returns to the signal transmitting device (receiving antenna) along the same path. The received echo signal and the coupling signal of the transmitted signal are mixed to generate a difference frequency signal. In the way of converting into frequency difference, the measurement frequency replaces the direct measureme...
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IPC IPC(8): G01F23/284G01S7/35
CPCG01F23/284G01S7/354
Inventor 赵博张曰义孟祥焱沈绍祥刘小军方广有
Owner AEROSPACE INFORMATION RES INST CAS