孔內多深度光纖光柵水壓與溫度感測系統研發與測試

含水層常為地下水使用的來源，一旦遭受污染將立即影響供水安全，且其復育的難度甚高。為預測整治藥劑與污染團在深層含水層的移動路徑，了解地下水特性（如地下水質、水位與水溫等）相當關鍵。然而，傳統觀測井多僅在特定深度開篩，只能觀測地下水在含水層中的平均狀態，故所得資訊有限。據此，本研究使用光纖布拉格光柵（Fiber Bragg Grating, FBG）發展多層地下水壓與溫度量測系統，可在一個鑽井內同時進行數個深度的水壓與溫度量測。光纖有遠距離訊號傳輸穩定、訊號不易受水與電磁波干擾、安全性高等優點。本研究透過室內與現地測試驗證與展現此系統的性能。

關鍵字

多層式光纖光柵感測系統；地下水壓；地下水溫

並列摘要

Groundwater are the main source of water supply in the semi-arid or arid areas. If the aquifers are contaminated, it will immediately affect people's health. Meanwhile, groundwater rehabilitation will also face great challenges. To predict the movement path of the remediation agent and the plume in the aquifer, it is very important to observe the aquifer status, such as water quality, water pressure, temperature, etc. However, the traditional EPA monitoring well always opens screen at a specific depth range and can only measure the average aquifer status, which can provide limited information for groundwater delineation. To address this issue, we employ fiber Bragg grating (FBG) technology to develop a multi-level groundwater pressure and temperature sensing system, which can simultaneously measure multiple water pressures and temperatures at different depths in the same borehole. This system takes the advantage of optical fiber: long-distance and stable signal transmission, the signal is not easily interfered by water and electromagnetic waves, and no sparks. To demonstrate the capability of the developed multi-depth discrete FBG sensing system, we have conducted an indoor test and an on-site test, and the results are discussed in this study.

並列關鍵字

multi-level fiber grating sensing system ； groundwater pressure ； groundwater temperature

國際替代計量

孔內多深度光纖光柵水壓與溫度感測系統研發與測試

全文下載

主題瀏覽