A tungstate powder probe based on fluorescence intensity ratio, a portable temperature detection system and a manufacturing method thereof

By preparing and coupling tungstate powders doped with Er2O3 and Yb2O3 by Y2O3, ZnO, WO3, K2CO3 and multimode optical fiber, combined with laser and spectrometer, a high-precision and interference-resistant portable temperature detection system was realized, solving the application problem of traditional temperature measuring instruments in special environments.

CN122302877APending Publication Date: 2026-06-30CHINA JILIANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA JILIANG UNIV
Filing Date
2024-12-31
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Traditional temperature measuring instruments cannot meet the requirements of high sensitivity, high accuracy and portability, especially in special environments such as electromagnetic interference, strong acid and alkali corrosion and biomedical applications. Furthermore, there is a gap in the field of portable temperature detection systems based on fluorescence intensity ratio.

Method used

Using Y2O3, ZnO, WO3, and K2CO3 as matrices, tungstate powder doped with Er2O3 and Yb2O3 is coupled with multimode optical fiber, combined with a 980nm laser, optical isolator, micro spectrometer and STM32 microcontroller, temperature measurement is achieved through fluorescence intensity ratio signal processing.

Benefits of technology

It achieves high-precision temperature measurement, strong anti-interference ability, temperature measurement range of 256-576K, accuracy of ±0.2K, and system response time of about 380ms, filling the gap in portable temperature detection systems.

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Abstract

A tungstate powder probe based on fluorescence intensity ratio, a portable temperature detection system, and their fabrication method are disclosed, belonging to the field of optical luminescent materials technology. The material uses high-purity Y₂O₃, ZnO, WO₃, and K₂CO₃ as a matrix, doped with Er₂O₃ and Yb₂O₃. The preparation method involves adding anhydrous ethanol to a certain proportion of the raw materials, thoroughly grinding and pressing them into tablets, sintering at high temperature, and then grinding them into powder. The temperature sensing system is fabricated by coupling the prepared powder to one end of a multimode optical fiber as a temperature probe. The other end is connected to a portable spectrometer and a small light source, respectively, and a microcontroller processes the electronic signal returned by the spectrometer. The resulting material exhibits extremely high upconversion luminescence efficiency, strong anti-interference ability, and can be used in harsh environments such as high temperature, high electromagnetic interference, and strong corrosion. Furthermore, since the detection is based on relative light intensity changes, the influence of light source power fluctuations on the measurement results is eliminated. The portable temperature detection system also has advantages such as high response speed, high accuracy, and ease of carrying and use.
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