雷達波定點在線測流是一種全自動流量遙測系統，可以全程監測明渠水流量過程。該測流系統不受溫度、濕度、降雨、水深、渾水、水面漂浮物影響，非常適合灌區、河道等明渠渠道水情下的流量測驗。基于脈沖雷達技術原理測量河渠水體表面流速，同時與雷達水位傳感器配合使用，安裝在河道、灌區等明渠渠道的規則型斷面處，計算流量，即：在規則斷面處，測量出水流通過該斷面的速度，同時測量出水體的深度，通過數學幾何原理計算出通過該斷面的水流流量。
一、產品簡介
ML3雷達波定點在線測流是一種全自動流量遙測系統，可以全程監測明渠水流量過程。該測流系統不受溫度、濕度、降雨、水深、渾水、水面漂浮物影響，非常適合灌區、河道等明渠渠道水情下的流量測驗。
二、組成部分
主要組成設備
（1）雷達水位表面流速流量三合一；
（2）遙測終端機RTU；
（3）太陽能供電系統；
（4）立桿與支架；
（5）避雷接地。
三、工作原理
雷達表面流速儀是基于脈沖雷達技術原理測量河渠水體表面流速，同時與雷達水位傳感器配合使用，安裝在河道、灌區等明渠渠道的規則型斷面處，計算流量，即：在規則斷面處，測量出水流通過該斷面的速度，同時測量出水體的深度，通過數學幾何原理計算出通過該斷面的水流流量。
四、測流站特性
雷達表面測流系統的主要特性是采用非接觸式方式測流，其主要有一套雷達水位流速流量三合一傳感器組成，通過立桿架設方式懸空于渠道上方，通過對規則斷面的水位深度及瞬時表面流速的測量，計算出此一時刻通過該斷面的流量。主要特性如下：
（1）優勢
采用非接觸式，可帶水安裝，不受渠道水流、積水限制；
無阻水現象；
不易受渠道中的雜物、漂浮物影響；
不受水質、泥沙含量的影響；
適用于流速較快、流量較大的渠道。
（2）干擾因素
風速的影響：風速容易造成水面的波動，產生誤報誤測現象；
流速較慢：當水面流速較慢時候，測量誤差增大；
風沙天氣：風沙天氣對雷達波的信號強度影響較大，致使測量誤差較大；
強降雨天氣：遇到強降雨的天氣，雷達波容易受雨強影響，致使測量誤差較大。
五、技術參數
水位測量
測距范圍：0.1-40米
測距精度：±5mm
測距分辨率：1mm
間隔時間：1-5000min
流速測量
測距范圍：0.15～15m/s
測速精度：±2%
速度分辨率：0.01m/s
流量測量
流量=平均流速x過流斷面面積x修正系數
平均流速由流速計采集流體表面流速，并經過模型計算得到
過流斷面面積由水位計測得的水位以及斷面信息算出
雨量監測
測量范圍：雨強0～4mm/min
測量精度：±0.2mm
分辨率：0.2mm
承雨口徑：φ200mm
供電方式：太陽能電池板+蓄電池組合供電
太陽能功率：100W（選配）
蓄電池參數：DC3.7V 10Ah
支架高度：立桿3米橫臂3米
工作環境：-45℃～85℃（不結冰狀態）
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明渠流量監測站廣泛應用于以下場景：實時監測河流、渠道中的水位和流量，為防汛抗旱提供及時準確的數據支持。在防汛抗洪工作中，通過實時監測河流流速和流量，為洪水預警提供關鍵數據，幫助相關部門提前做好防洪準備。幫助水利部門了解渠道中的水量分布情況，制定合理的水資源調度方案。準確掌握河流水量變化，有助于合理分配水資源，保障工農業生產和居民生活用水需求。實時監測灌溉渠道的水流情況，確保灌溉水量的準確性和及時性
雷達明渠流速測流系統采用非接觸式測量方式，不與水體直接接觸，避免了傳統測流方式中設備易被腐蝕、堵塞的問題，提高了設備的使用壽命和穩定性。該系統能夠高精度地測量水體表面的流速，并結合水位數據準確計算出流量。同時，它不受溫度、濕度、降雨、水深、渾水、水面漂浮物等因素的影響，確保了測量的可靠性和準確性。不受天氣條件的限制，能夠24小時不間斷地進行監測，非常適合在灌區、河道等明渠渠道進行流量測驗。
灌區流量監測系統廣泛應用于河流、水庫、農田灌溉、城市排水系統等領域，為水資源管理、防洪減災和環境保護提供了重要的技術支持。具體來說：能夠實時監測水源地的進水流量，確保供水系統的穩定輸入;同時通過對泵站出水口流量的監測，可以精確控制泵站的運行效率，避免水資源的浪費。
明渠流量監測系統使得測量精度大幅提高，能夠準確反映明渠中的微小流量變化。非接觸式測量避免了傳統接觸式測量可能帶來的污染和磨損問題，保證了長期測量的穩定性和準確性。實時監測具備實時監測和數據傳輸能力，確保決策者能夠迅速獲取最新數據并及時做出響應。多功能集成通常可同時測量水位、流速、流量、累計流量等多個參數，功能強大。安裝方式簡單靈活，不需要對河道進行大規模改造或水下作業;維護工作也相對較少。
水庫流量實時監測設備利用多普勒效應測量水流速度。當雷達傳感器向水面發射微波信號時，信號遇到運動的水面會發生散射并構成回波。由于接收到的回波頻率相對于發射頻率發生一定偏移，因此可以通過多普勒頻率方程求得水面流速。雷達明渠流量監測站的工作原理基于非接觸式測量技術。它利用雷達波(通常是微波)作為測量媒介，通過發射雷達波并接收其從水面(及可能的水底)反射回來的信號，根據雷達波的傳播時間或頻率變化來精確計算
