基于紫外胶热光效应的经济高效的光纤温度传感系统
首发时间:2020-01-22
摘要:本文基于紫外线可固化光学胶的热光效应提出了一种经济高效的光纤温度传感系统。由于胶水的折射率和热膨胀系数对温度变化较为敏感,当温度变化时,胶水的输出光功率随之变化,从而实现温度测量。实验系统设计采用双通道对数放大电路,能够有效地消除激光器由于温漂等产生的额外误差,提高实验结果的准确性。通过仿真和实验,对比分析了折射率和热膨胀系数对传感元件光功率损耗的影响。实验结果表明,传感器在5℃-30℃温度范围内平均测温误差为0.56℃。该传感器具有成本低、结构简单、易于操作的优点,可应用于某些低成本温度测量的应用场景中。
关键词: 光学工程 传感器 温度 光纤温度传感器 布拉格光栅
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A optical temperature sensor based on thermo-optic effect of UV-glue
Abstract:We propose a cost-effective optical fiber temperature sensing system based on the thermo-optic effect of UV-curable optical adhesive. In this scheme, the received optical power change with the refractive index and thermal expansion coefficient of the glue, which is related to the temperature, the output optical power of the sensor changes with temperature. A dual-channel logarithmic amplifier is used to eliminate extra error caused by temperature drift of laser, thereby improving the accuracy of the measurments. The impact of the refractive index and thermal expansion coefficient on the optical power loss of the sensing element is analyzed by simulation and experiments. The experimental results demonstrate that the average temperature error is about 0.56℃ in the temperature range of 5℃ to 30℃. The proposed technique shows the advantages of low cost, simple structure and easy operation, which is attractive for some low cost temperature measurement applications.
Keywords: optical engineering sensors temperature fiber temperature sensor Bragg grating
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基于紫外胶热光效应的经济高效的光纤温度传感系统
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