A liquid level measuring system for a cryogenic vessel and a method of measuring and calibrating the same

By using a liquid level measurement system with strain gauges and temperature sensors in a cryogenic container, the problems of heat leakage and leakage in the prior art are solved, and the accurate measurement and calibration of the liquid level in the cryogenic container is realized, thereby improving safety and stability.

CN121632291BActive Publication Date: 2026-05-29HYDROGEN CRYOGENIC TECHNOLOGY (HANGZHOU) CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HYDROGEN CRYOGENIC TECHNOLOGY (HANGZHOU) CO LTD
Filing Date
2026-01-26
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing liquid level measurement devices for cryogenic containers have complex structures, introducing additional risks of heat leakage and leakage, which affect insulation performance and safety.

Method used

The liquid level measurement system, composed of strain gauges and temperature sensors, achieves accurate measurement and calibration of the liquid level by combining the suspended strain gauges and the temperature sensor in the inner container with the liquid level monitoring instrument. It avoids the introduction of additional pressure measurement pipes and uses signal lines with low thermal conductivity to reduce heat leakage.

Benefits of technology

It enables precise measurement and calibration of the cryogenic liquid level inside cryogenic containers, improving storage safety and stability, reducing the risk of heat leakage, and extending service life. It is suitable for the storage and transportation of toxic and hazardous cryogenic liquids.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application provides a liquid level measuring system of a low-temperature container and a liquid level measuring calibration method using the liquid level measuring system. Strain gauges are arranged on multiple hangers between an inner container and an outer container of the low-temperature container, multiple liquid level values of a low-temperature liquid in the inner container are obtained by using strain data of the multiple strain gauges, meanwhile, a position range of a gas-liquid interface in the inner container is obtained by using multiple temperature sensors arranged vertically and uniformly, thereby obtaining a reference range of the liquid level values, the multiple liquid level values of the low-temperature liquid obtained by using the strain data of the multiple strain gauges are screened one by one by using the reference range, liquid level values outside the reference range are removed, and the remaining liquid level values are averaged, and finally, an accurate liquid level value is obtained. Therefore, under the premise of accurately measuring the liquid level of the low-temperature liquid in the low-temperature container, no additional heat leakage is increased, and the storage safety of the low-temperature container is improved.
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