光学与光电技术, 2017, 15 (3): 30, 网络出版: 2017-07-10  

基于光纤光栅传感的跨季节储热土壤温度测量技术的研究

Study on Soil Temperature Measurement Based on Fiber Bragg Grating Sensing Technology in Cross Seasonal Heat Storage
作者单位
1 北京石油化工学院 信息工程学院, 北京 102617
2 北京化工大学 信息科学与技术学院, 北京 100029
3 天普新能源科技有限公司, 北京 102612
摘要
跨季节储热系统是太阳能集热技术和地源热泵技术相结合的一种综合利用新能源的采暖技术。为了测量地源热泵周围的土壤温度分布,为跨季节储热系统的设计和运行提供技术参数,对光纤光栅传感测温技术进行了研究。基于光纤光栅原理,采用可调谐光纤光栅滤波器对光纤光栅波长进行解调,检测光纤光栅波长微小的变化情况,从而计算出温度。光源发出的连续带宽光波长范围是1 526~1 562 nm,系统有10个采样通道,每个通道12个测点,每个点相隔10 m,采集速率同步25 Hz。并设计了基于ARM的数据采集远传模块,实现光纤数据的远程传输和监测。经过对北京某监测点的近3个月的持续采样,实验结果显示,该测量系统精度能达到0.5 ℃,可以实时地、持续地测量地下土壤温度的分布,满足系统对监测温度的要求。
Abstract
The cross seasonal heat storage system is a new energy technology, which combines the solar energy collection technology and the ground source heat pump technology. In order to measure the distribution of soil temperature around the ground source heat pump, to provide technical parameters for the design and operation of the cross seasonal heat storage system, the fiber Bragg grating sensor temperature measurement technology is studied. In this study, based on the principle of fiber Bragg grating, the fiber grating wavelength demodulation is made by using tunable fiber grating filter to detect the change of the wavelength of the fiber grating. The continuous bandwidth optical wavelength range of the light source is 1 526~1 562 nm, and the system has 10 sampling channels, each channel 12 measurement points, each point 10 meters apart, the acquisition rate of each channel synchronization 25 Hz. In order to realize remote monitoring and data transmission of optical fiber, remote data acquisition module is designed based on ARM. After a monitoring point in Beijing for nearly 3 months of continuous sampling, the experimental results show that the measurement accuracy of the system can reach 0.5 degrees Celsius, real-time, continuously measuring distribution of underground soil temperature and meet the requirements of temperature monitoring system.

刘学君, 李京, 卢浩, 吴艳元, 戴波. 基于光纤光栅传感的跨季节储热土壤温度测量技术的研究[J]. 光学与光电技术, 2017, 15(3): 30. LIU Xue-jun, LI Jing, LU Hao, WU Yan-yuan, DAI Bo. Study on Soil Temperature Measurement Based on Fiber Bragg Grating Sensing Technology in Cross Seasonal Heat Storage[J]. OPTICS & OPTOELECTRONIC TECHNOLOGY, 2017, 15(3): 30.

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