A Temperature Sensing Demodulation System based on Weak Reflection Fiber Bragg Grating

CHENG Jiahui; FU Haiwei; CHEN Miao; LI Gen; XIAO Jiayue

doi:10.13756/j.gtxyj.2025.240058

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A Temperature Sensing Demodulation System based on Weak Reflection Fiber Bragg Grating

更新时间：2025-06-18

- A Temperature Sensing Demodulation System based on Weak Reflection Fiber Bragg Grating
- Study on Optical Communications Issue 3, (2025)
- 作者机构：
  
  西安石油大学　a. 陕西省油气资源光纤探测工程研究中心；b. 陕西省油气井测控技术重点实验室，西安　 710065
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2025.240058
  CLC： TN929
- Received：08 March 2024，
  
  Revised：09 April 2024，
  
  Published：10 June 2025
- 稿件说明：
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程嘉慧，傅海威，陈苗，等. 基于弱反射光纤光栅的温度传感解调系统[J]. 光通信研究，2025(3): 240058.

Cheng J H, Fu H W, Chen M, et al. A Temperature Sensing Demodulation System based on Weak Reflection Fiber Bragg Grating[J]. Study on Optical Communications, 2025(3): 240058.
程嘉慧，傅海威，陈苗，等. 基于弱反射光纤光栅的温度传感解调系统[J]. 光通信研究，2025(3): 240058. DOI： 10.13756/j.gtxyj.2025.240058.

Cheng J H, Fu H W, Chen M, et al. A Temperature Sensing Demodulation System based on Weak Reflection Fiber Bragg Grating[J]. Study on Optical Communications, 2025(3): 240058. DOI： 10.13756/j.gtxyj.2025.240058.

摘要

【目的】

文章旨在设计并搭建一种针对弱反射光纤布拉格光栅（WFBG）的温度传感解调系统，该系统通过创新的测量流程，实现了对微弱反射信号的高精度采集与处理，旨在提高温度传感的灵敏度和线性度，同时确保系统的稳定性和重复性。

【方法】

文章首先构建了一个基于光/电转换器的信号采集系统，将WFBG的微弱反射信号转换并放大为电压信号；随后，通过单片机实现了对放大后的电压信号的高效采集，引入误差理论并优化重复测量平均次数，有效降低了随机误差的影响。同时采取措施减少了测量带来的潜在延时，确保快速准确的数据处理；此外，还进行了温度响应特性的实验研究，评估系统在30~80 ℃范围内的性能。

【结果】

实验结果表明，文章所提传感解调系统在温度测量范围内表现出了优异的性能。系统的温度灵敏度高达11.55 pm/℃，线性度高达0.992 62，表明了其在温度测量上的高精度和良好的线性特性。系统的稳定性与重复性也经过严格测试，进一步证实了其在实际应用场景中的可靠性和有效性。

【结论】

综上所述，文章成功设计并实现了一种结构简单、成本效益高的WFBG温度传感解调系统，该系统不仅在温度传感方面表现出了高精度和高稳定性，且其创新的结构和优化的测量流程也使其适用于弱光栅传感阵列信号的解调。这一研究成果对于推动光纤传感技术的发展具有重要意义。

Abstract

【Objective】

The purpose of this study is to design and build a sensing demodulation system for Weak Reflection Fiber Bragg Gratings (WFBG). The system optimizes the measurement process through innovative methods to achieve high-precision acquisition and processing of weak reflection signals. The aim is to improve the sensitivity and linearity of temperature sensing

while ensuring the stability and repeatability of the system.

【Methods】

In the research

we first constructed a signal acquisition system based on an optoelectronic converter

which can convert and amplify the weak reflection signal of WFBG into a voltage signal. Subsequently

efficient collection of amplified voltage signals was achieved through a microcontroller unit. Introducing error theory and optimizing the number of repeated measurements can effectively reduce the impact of random errors. At the same time

measures were taken to reduce the potential delay caused by measurement

ensuring fast and accurate data processing. In addition

experimental studies on temperature response characteristics were conducted to evaluate the performance of the system in the range of 30~80 ℃.

【Results】

The experimental results show that the designed sensing demodulation system exhibits excellent performance within the temperature measurement range. Specifically

the system exhibits a high temperature sensitivity of 11.55 pm/℃ and a high linearity of 0.992 62

indicating its high accuracy and good linear characteristics in temperature measurement. In addition

the stability and repeatability of the system have been rigorously tested

further confirming its reliability and effectiveness in practical application scenarios.

【Conclusion】

In summary

this study successfully designed and implemented a structurally simple and cost-effective WFBG sensing demodulation system. This system not only exhibits high accuracy and stability in temperature sensing

but also its innovative structure and optimized measurement process make it suitable for demodulating signals from weak grating sensor arrays. This research achievement is of great significance for promoting the development of fiber optic sensing technology.

关键词

Keywords

references

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