摘要
流量量控在工業上佔有極重要的地位，而光纖優越之抗電磁干擾及低傳輸損耗特性，在感測領域之應用已行之多年。本論文提出一種新型光纖流量感測器原型製作，以高精度傳統渦輪流量計為主體，並將感測信號轉為光調變信號以光纖進行傳輸。由於光纖傳輸損耗低，因此適用於偏遠地區之遥測監控，而抗電磁干擾特性則可望應用於落雷區之水庫或水廠中。
關鍵字
無資料並列摘要
Optical fiber has been applied in sensing technology for years. Compared with conventional sensors, optical fiber excels in low cost, small size, free from electromagnetic interference, low transmission loss, etc. Hence it is very suitable for the environmental monitoring and measuring in various industries. An innovative optical fiber flowmeter combining optical fiber sensing technologies and turbine flowmeter is presented in this paper. The sensor head includes a precise propeller. The optical fibers are used to transmit and collect the light signals. The light injects on the blades of the propeller will be reflected and received by the collecting fiber. By calculating the reflected signal frequency, we can convert it into the flow velocity after appropriate calibration. A prototype was developed and verified in a simulated flow measuring system. The results show good linearity and accuracy which could be used for remote monitoring, especially in the hazard area under safety concern.
延伸閱讀
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