An ionization chamber type liquid level detection device suitable for a variety of highly radioactive media

By using a multi-polar ionization chamber detector in a high-radioactive environment, and by using a collimating window and a high-voltage electric field to drive the movement of charged particles, non-contact identification and positioning of various media can be achieved. This solves the problem of difficulty in obtaining interface information in existing technologies and improves the safety and automation control of the process.

CN121475362BActive Publication Date: 2026-05-26SHAANXI WEIFENG NUCLEAR ELECTRONICS
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Patent Information

Application Number
CN202511899279.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-12-16
Publication Date
2026-05-26
Estimated Expiration
2045-12-16

AI Technical Summary

Technical Problem

Existing technologies struggle to simultaneously identify and locate multiple coexisting media in high-radioactive environments under non-contact conditions, making it difficult to acquire interface information under complex operating conditions and affecting the safety monitoring and automated control of the process.

Method used

A multi-electrode ionization chamber detector is used. The collimation window guides the rays into the inert gas inside the shell to generate charged particles. The high-voltage electric field drives the particles to move to the collection plate. The front-end data processing unit identifies the liquid level height of the medium based on the strength of the ionization signal and constructs multiple equally spaced detection sensitive zones to achieve non-contact positioning.

Benefits of technology

It enables non-contact synchronous identification and positioning of various highly radioactive media under complex working conditions, improving the safety monitoring and automation control level of the process and avoiding the difficulty of obtaining interface information.

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Abstract

This invention belongs to the field of liquid level measurement technology for containers or pipelines containing highly radioactive media, and relates to an ionization chamber type liquid level detection device suitable for various highly radioactive media. The device includes a multi-electrode ionization chamber detector, a collimating shield, and a pre-processing unit. This invention guides the radiation emitted by the highly radioactive media into the housing through multiple collimating windows. This ionizes the inert gas in each detection sensitive area, generating charged particles. The high-voltage electric field in each detection sensitive area drives the particles to move to the corresponding collecting electrode. The collecting electrode captures the charged particles and generates an ionization signal, which is sent to the pre-processing unit. The pre-processing unit determines the liquid level height of the corresponding highly radioactive media based on the varying ionization strength signals generated by the ionized inert gas caused by the different radiation intensity emitted by the various highly radioactive media. This allows for the simultaneous identification and location of multiple coexisting highly radioactive media under non-contact conditions.
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