光导纤维测温计及其在混凝土坝温度测量中的应用

利用光导纤维测定温度和温度分布,是一项崭新的应用技术。该技术利用光纤作为温度传感器,埋设于混凝土坝内,可以连续测量混凝土的温度分布。介绍光导纤维温度计的基本原理,并对日本某混凝土坝的实测温度场进行分析,与传统温度计的测量结果进行对比。结果表明,光纤温度精度高、密度大,而且通过高精度测量,还可以推测坝体的浸漏位置,在混凝土坝温度场测量及监控方面将有很好的应用前景。

Optical Fiber Thermometer and Its Application in Temperature Observation of Concrete Dam

Temperature measurement by optical fiber is a new applied technology. By time difference of lunching and reflecting light, the position where the temperature to be measured can be precisely located(location), and by the temperature dependence property of Raman reflecting light,the temperature at the reflecting point can be determined.The advantage of optical fiber thermometer compared with traditional one is that the temperature distribution along the fiber can measured. In this paper, after the introduction of the fundamental theory of opti_cal fiber thermometer,the observation temperature data by optical fiber thermometer of a RCD dam is analyzed and compared with the traditional thermometer.The results show that optical fiber thermometer has enough precision in the observation of dam temperature,and the widely application in the measurement and observation of dam temperature is expected.alfiberthermometer ,theobserva