Sun Shangpeng, Ma Feiyue, He Yanxiao, Niu Bo, Wang Cheng, Dai Longcheng, Zhao Zhongyang
Electric Power Research Institute, State Grid Ningxia Power Co., Ltd., Yinchuan 750011, China.
Liangjiang International College, Chongqing University of Technology, Chongqing 401135, China.
Micromachines (Basel). 2025 Feb 19;16(2):235. doi: 10.3390/mi16020235.
The piezoelectric grating voltage sensor has garnered significant attention in the realm of intelligent sensing, attributed to its compact size, cost-effectiveness, robust electromagnetic interference (EMI) immunity, and high network integration capabilities. In this paper, we propose a PZT-FBG (piezoelectric ceramic-fiber Bragg grating) voltage-temperature demodulation optical path architecture. This scheme effectively utilizes the originally unused temperature compensation reference grating, repurposing it as a temperature measurement grating. By employing FBGs with identical or similar parameters, we experimentally validate two distinct optical path connection schemes, before and after optimization. The experimental results reveal that, when the input voltage ranges from 250 V to 1800 V at a frequency of 50 Hz, the goodness of fit for the three fundamental waveforms is 0.996, 0.999, and 0.992, respectively. Furthermore, the sensor's frequency response was tested across a frequency range of 50 Hz to 20 kHz, demonstrating that the measurement system can effectively respond within the sensor's operational frequency range. Additionally, temperature measurement experiments showed a goodness of fit of 0.997 for the central wavelength of the FBG as the temperature increased. This research indicates that the improved optical path connection method not only accomplishes a synchronous demodulation of both temperature and voltage parameters but also markedly enhances the linearity and resolution of the voltage sensor. This discovery offers novel insights for further refining sensor performance and broadening the applications of optical voltage sensors.
压电光栅电压传感器因其尺寸紧凑、成本效益高、强大的抗电磁干扰（EMI）能力和高网络集成能力，在智能传感领域备受关注。在本文中，我们提出了一种PZT-FBG（压电陶瓷-光纤布拉格光栅）电压-温度解调光路架构。该方案有效地利用了原本未使用的温度补偿参考光栅，将其重新用作温度测量光栅。通过采用参数相同或相似的光纤布拉格光栅（FBG），我们在优化前后通过实验验证了两种不同的光路连接方案。实验结果表明，当输入电压在50Hz频率下从250V变化到1800V时，三种基本波形的拟合优度分别为0.996、0.999和0.992。此外，在50Hz至20kHz的频率范围内对传感器的频率响应进行了测试，结果表明测量系统能够在传感器的工作频率范围内有效响应。另外，温度测量实验表明，随着温度升高，FBG中心波长的拟合优度为0.997。该研究表明，改进后的光路连接方法不仅实现了温度和电压参数的同步解调，还显著提高了电压传感器的线性度和分辨率。这一发现为进一步优化传感器性能和拓宽光学电压传感器的应用提供了新的见解。
