A method for measuring a liquid level based on a millimeter wave radar

By dynamically adjusting the sampling window length in millimeter-wave radar liquid level measurement and analyzing the level and trend of liquid level fluctuations, the problem of balancing response speed and accuracy under dynamic changes in liquid level is solved, and efficient liquid level measurement under complex working conditions is achieved.

CN122108308AActive Publication Date: 2026-05-29QINGDAO AUBON INSTR CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
QINGDAO AUBON INSTR CO LTD
Filing Date
2026-04-28
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing millimeter-wave radar liquid level measurement technology cannot simultaneously balance response speed and measurement accuracy when faced with dynamic changes in the liquid level. Fixed measurement modes are prone to slow response or decreased measurement stability when operating conditions change.

Method used

By performing multiple radar detections within consecutive measurement time windows, the range and change are extracted. Combined with historical data analysis, the level and trend of liquid surface fluctuations are analyzed, and the sampling window length is dynamically adjusted to adapt to changes in the state of liquid surface fluctuations.

Benefits of technology

It achieves a balance between measurement response speed and accuracy under dynamic operating conditions. By adaptively adjusting the window length, it solves the problems of response lag and insufficient stability in fixed mode, ensuring the continuity and reliability of measurement results.

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Abstract

The application belongs to the technical field of liquid level measurement, and specifically discloses a liquid level measurement method based on millimeter wave radar, which comprises the following steps: performing radar detection for multiple times in continuous multiple measurement time windows to obtain original measurement value sequences of the windows; extracting the range and the change amount per unit time of the sequences to determine the liquid surface fluctuation level corresponding to the current measurement time window; performing fluctuation trend analysis on the liquid surface fluctuation levels of the continuous multiple measurement time windows; determining the adjustment direction of the window length according to the current liquid surface fluctuation level and the change trend; generating a sampling window length adjustment instruction of the next measurement time window and adjusting the sampling window length; and performing radar detection in the adjusted measurement time window to output a liquid level measurement result. Through dynamic adjustment of the sampling window length, the application overcomes the contradiction between response speed and stability caused by a single fixed window length, and realizes adaptive optimization of measurement performance.
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Citation Information

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