伍先鋒1，胡興藝2 ，李廣源2，譚云輝3

　　(1. 湖南省邵陽水文水資源勘測中心，湖南 邵陽 422300;

　　2.湖南省水文水資源勘測中心,湖南 長沙 410006;

　　3.湖南省水文儀器設備檢測中心，湖南 長沙 410007)

　　摘 要：懸移質泥沙在線測量一直是一個難以解決的問題，紅外光的測量技術是一種快速、有效和簡便的懸沙在線觀測方法，對于低含沙量河流應用前景廣闊。設計基于紅外光傳感器的泥沙在線監測系統，介紹系統的測量原理、安裝位置選擇、防雷設計措施等。從黃橋水文站的大斷面和泥沙整編資料對其含沙量橫向分布進行分析，確定在線監測位置的代表性，實現懸移質泥沙在線監測。通過1個汛期的數據采集，結合人工實測含沙量結果進行統計分析，探索出該方法在實際水域中應用的可行性。從2019年8月—2020年4月率定和運行結果看，在一定邊界條件下，該方法所測數據基本符合測驗有關規范要求，且數據暢通率達到98.79%，在新儀器新設備推廣方面有一定指導意義。

　　關鍵詞：紅外光;懸移質泥沙;光學傳感器;濁度;含沙量;泥沙在線監測

　　Research and application of online monitoring method of sediment based on infrared light sensor

　　WU Xianfeng1, HU Xingyi2, LI Guangyuan2, TAN Yunhui3

　　(1. Hunan Shaoyang Hydrology and Water Resources Survey Center，Shaoyang 422300, China;

　　2. Hunan Hydrology and Water Resources Survey Center, Changsha 410006, China;

　　3. Hunan Hydrological Instrument and Equipment Testing Center, Changsha 410007, China)

　　Abstract: The online measurement of suspended sediment has always been a difficult problem to solve. The infrared light measurement technology offers a fast, effective and simple online observation method of suspended sediment, which is promising for rivers with low sediment concentration. This paper introduces the design of an online monitoring method of sediment based on infrared light sensor, including the measurement principle, location for installation, lightning-proof design of the system. By analyzing the horizontal distribution of sediment concentration from the large section and observation data of Huangqiao hydrological station, the representativeness of the online monitoring location is determined, so that online monitoring of suspended sediment is realized. Using the data collected during one flood season, statistical analysis is carried out by comparing with the manually measured data, to explore the feasibility of this method in practice. Based on the calibration and operation results from August 2019 to April 2020, under certain boundary conditions, the data measured by this method can generally meet the requirements of relevant specifications and the data operation rate reaches 98.79%, which provides reference for promoting new instruments and equipment.

　　Key words：infrared light;suspended sediment;optical sensor;turbidity;sediment concentration;online monitoring of sediment