Cd2+ and temperature dual-parameter optical fiber chemical sensing system in water environment

By coating a magnetic MOF-cadmium ion imprinted polymer onto an optical fiber sensing unit and combining it with residual neural network demodulation, the problems of expensive, complex instruments and interference from coexisting ions in existing cadmium ion detection technologies are solved. This achieves dual-parameter detection of cadmium ions with high sensitivity and rapid response, making it suitable for online monitoring of complex aquatic environments.

CN122651645APending Publication Date: 2026-08-28HARBIN INST OF TECH
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Patent Information

Application Number
CN202610755236.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-28
Publication Date
2026-08-28

AI Technical Summary

Technical Problem

Existing cadmium ion detection methods suffer from problems such as expensive and bulky instruments, long detection cycles, complex operation, cumbersome sample pretreatment, and susceptibility to interference from coexisting ions in complex aquatic environments. These methods are difficult to implement for rapid and accurate cadmium ion detection, especially in the event of sudden water pollution incidents, and cannot meet the needs for rapid response and continuous online monitoring.

Method used

A self-emission light source and a fiber optic sensing unit coated with magnetic MOF-cadmium ion imprinted polymer are used, combined with a residual neural network demodulation module. The dual-parameter detection of cadmium ion concentration and temperature is achieved through a spectrometer and a photoelectric detection module. The high specific surface area and ordered pore structure of MOF material are used to enhance the specific recognition ability of cadmium ions, and the coupling effect of cadmium ion concentration and temperature is separated by a residual neural network.

Benefits of technology

It achieves high sensitivity, rapid response and high precision detection of cadmium ions, and can effectively separate the coupling effect of cadmium ion concentration and temperature in complex water environments, improving the measurement accuracy and robustness of the sensor and adapting to online monitoring in variable temperature environments.

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Abstract

A kind of water environment cadmium ion and temperature double parameter optical fiber chemical sensing system relates to water body environment detection field.In the above system, spontaneous emission light source is near infrared light source;The surface of optical fiber sensing unit is coated with magnetic MOF-cadmium ion imprinted polymer;The light signal generated by spontaneous emission light source enters optical fiber sensing unit, optical spectrometer collects the transmission spectrum signal of optical fiber sensing unit, and the collected spectrum data are output to photoelectric detection module;Photoelectric detection module converts light signal into electrical signal and transmits to demodulation module;Demodulation module gives the cadmium ion concentration and temperature according to input signal using machine learning algorithm.The present application has higher specific recognition ability to cadmium ion, and can effectively separate the coupling influence of cadmium ion concentration and temperature on sensing signal.
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