光学学报, 2019, 39 (9): 0906008, 网络出版: 2019-09-09
用于轴瓦温度监测的无线耦合光纤布拉格光栅传感器 下载: 881次
Wirelessly Coupled Fiber-Bragg-Grating Sensor for Bushing-Temperature Monitoring
光纤光学 十字头轴瓦 光纤布拉格光栅 温度监测 准直器 无线传输 fiber optics crosshead bushing fiber Bragg grating temperature monitoring collimators wireless transmission
摘要
十字头轴瓦的磨损是压缩机无法正常使用的重要原因之一,实时检测轴瓦处的温度进而来判断轴瓦的磨损情况是确保压缩机安全、高效生产的重要检测手段。针对石化行业复杂的工况环境,提出并设计制备了一种无线耦合光纤布拉格光栅传感器,并用其进行光信号的空间传输以实现轴瓦处温度信号的提取。针对动态测量过程中产生的U型中心波长信号引起的解调温度差值过大的问题,利用插入损耗阈值,将一次动态运行过程中的温度改变量从4 ℃控制到0.1 ℃以内,提高了温度解调的准确度,实现了温度的无线监测。
Abstract
The abrasion of a crosshead bushing is one of the important reasons for the failure of the compressor under normal circumstances. To ensure the safe and efficient operation of the compressor, it is necessary to monitor the temperature of the bushing in real time to determine the abrasion. For complex working conditions in petrochemical industry, a wirelessly coupled fiber-Bragg-grating (FBG) sensor is proposed and designed to wirelessly transmit optical signals, thereby realizing the extraction of bushing’s temperature signals. However, in order to solve the problem of excessive demodulation temperature difference caused by the U-type signal at the center wavelength generated during a dynamic operation, the insertion-loss threshold is used to reduce the temperature change from 4 ℃ to less than 0.1 ℃. This improves the accuracy of temperature demodulation and realizes the wireless monitoring of temperature.
何为, 张翠, 童杏林, 邓承伟, 刘访, 陶渊, 冒燕. 用于轴瓦温度监测的无线耦合光纤布拉格光栅传感器[J]. 光学学报, 2019, 39(9): 0906008. Wei He, Cui Zhang, Xinglin Tong, Chengwei Deng, Fang Liu, Yuan Tao, Yan Mao. Wirelessly Coupled Fiber-Bragg-Grating Sensor for Bushing-Temperature Monitoring[J]. Acta Optica Sinica, 2019, 39(9): 0906008.