光纤光栅传感器用于渗漏检测的试验研究  

Experimental Study on Seepage Detection with FBG Sensors

作　　者：王月明[1] 袁宏才[1] 

机构地区：[1]武汉理工大学光纤传感技术研究中心,武汉430070

出　　处：《武汉理工大学学报》2009年第12期75-77,共3页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(60537050)

摘　　要：将加热电缆和光纤光栅温度传感器一起埋入堆石料,在现场进行升温和降温试验。试验表明,大坝堆石料在加热过程中温升随时间变化基本呈上升趋势,在降温过程中温差随时间变化基本呈下降趋势,加热过程的温升变化规律比降温过程更明显;当渗漏发生时,单位时间内温升很小,基本不变化;如果监测的温度突然降低且降低后温升很小甚至不再升高,表明有渗漏发生。通过这些规律,利用光纤光栅传感器对大坝渗漏进行连续安全监测,对大坝安全管理有着重要的现实意义。Fiber Bragg grating （FBG） temperature sensors with heating electric cables are buried in stockpile, warmed and cooled in field experiments. The experiments show that temperature change of stockpile dam is overall ascendant trend in heating and overall descendant trend in cooling, ascendant trend in heating is more obvious than descendant trend in cooling. When seepage occurs, small temperature changes in unit of time. If the detecting temperature reduced suddenly and temperature change was small and not ascendant any more, it shows that seepage occurs. From these disciplines, FBG temperature sensors are used in detecting continuously seepage of rock fill dam, which has important practical significance in rock fill dam safety management.

关 键 词：光纤光栅 传感器 湿度 渗漏检测 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]