廢水處理系統自動監控系統已成為必然之趨勢與需求，其各監測項目中，以流量變化即時監測最具關鍵性。由於現有流量監測設備多採接觸式量測原理，容易受到廢水的污染與干擾，而造成維護與資料品質等問題。所以本研究希望藉由光學影像監測技術的非接觸與非破壞特性，解決傳統接觸式感測器流體特性的干擾問題。 研究整合CCD光學影像量測技術與量水槽設備，以CCD攝影機連續擷取量水槽之影像，利用影像測邊原理分析槽內水平面位置，即時監測槽內液位改變及相對之流量變化；同時藉由分析影像之水體RGB值，即時監測廢水中真色色度值變化，探討此影像量測技術於流量及色度自動監測之可行性。 結果顯示數位影像法量測水位解析度可達0.02 cm 以下，且量測精密度小於0.008 cm ，即非接觸式數位影像法可精確量測水位變化，排除接觸式流量量測的問題，提昇流量量測的準確度；同時由影像分析自由水面之顏色值，可得知水中真色色度值變化情形。利用光學監測技術可現場即時監測水量水質狀況，完全避免樣品在採集與傳輸過程中可能引入的誤差因子，可有效滿足廢水處理系統或其他類似系統之即時流量量測需求。 The flow monitoring equipment of the wastewater treatment system mostly adopt the contact-type measuring principle, so it must direct against the difference of characteristics of fluid , and choose the suitable flow meter kind in order to avoid the error of detection or the damage of the monitoring instrument. This research hopes to solve the interference problem of the traditional contact-type detecting device with the non-contact and non-destruct image monitoring technology. Develop non-contact-type technology and system, assist the process of real-time flow monitor of wastewater treatment system, and promote the reliability of the monitoring data. This research combines the CCD optical image measuring technology and triangular notch weir, pick image of side of tank in succession by CCD camera, and analyze the position of water-level with image edge-detecting principle, monitor Head change and relative flow change immediately. At the same time, get Variation tendency of ADMI true color values of water by analyzing the water body RGB value of the image. Examine the feasibility of image measuring technology for automatic monitor of water flow and quality. The result shows that the resolution of image water-level measurement is less than 0.02 cm, and the precision is less than 0.008 cm, so non-contact digital image technology can measure Head change precisely, get rid of the question that the contact-type flow measurement, and promote the accuracy of the flow measurement. At the same time, Image measuring of free water surface can also get the variation tendency of ADMI true color values. The optical monitoring technology can provide water on-line and real-time monitor, and totally avoid the error factor that samples may be introduced in the course of gathering and transmitting.
