雷达波定点在线测流是一种全自动流量遥测系统，可以全程监测明渠水流量过程。该测流系统不受温度、湿度、降雨、水深、浑水、水面漂浮物影响，非常适合灌区、河道等明渠渠道水情下的流量测验。基于脉冲雷达技术原理测量河渠水体表面流速，同时与雷达水位传感器配合使用，安装在河道、灌区等明渠渠道的规则型断面处，计算流量，即：在规则断面处，测量出水流通过该断面的速度，同时测量出水体的深度，通过数学几何原理计算出通过该断面的水流流量。
一、产品简介
ML3雷达波定点在线测流是一种全自动流量遥测系统，可以全程监测明渠水流量过程。该测流系统不受温度、湿度、降雨、水深、浑水、水面漂浮物影响，非常适合灌区、河道等明渠渠道水情下的流量测验。
二、组成部分
主要组成设备
（1）雷达水位表面流速流量三合一；
（2）遥测终端机RTU；
（3）太阳能供电系统；
（4）立杆与支架；
（5）避雷接地。
三、工作原理
雷达表面流速仪是基于脉冲雷达技术原理测量河渠水体表面流速，同时与雷达水位传感器配合使用，安装在河道、灌区等明渠渠道的规则型断面处，计算流量，即：在规则断面处，测量出水流通过该断面的速度，同时测量出水体的深度，通过数学几何原理计算出通过该断面的水流流量。
四、测流站特性
雷达表面测流系统的主要特性是采用非接触式方式测流，其主要有一套雷达水位流速流量三合一传感器组成，通过立杆架设方式悬空于渠道上方，通过对规则断面的水位深度及瞬时表面流速的测量，计算出此一时刻通过该断面的流量。主要特性如下：
（1）优势
采用非接触式，可带水安装，不受渠道水流、积水限制；
无阻水现象；
不易受渠道中的杂物、漂浮物影响；
不受水质、泥沙含量的影响；
适用于流速较快、流量较大的渠道。
（2）干扰因素
风速的影响：风速容易造成水面的波动，产生误报误测现象；
流速较慢：当水面流速较慢时候，测量误差增大；
风沙天气：风沙天气对雷达波的信号强度影响较大，致使测量误差较大；
强降雨天气：遇到强降雨的天气，雷达波容易受雨强影响，致使测量误差较大。
五、技术参数
水位测量
测距范围：0.1-40米
测距精度：±5mm
测距分辨率：1mm
间隔时间：1-5000min
流速测量
测距范围：0.15～15m/s
测速精度：±2%
速度分辨率：0.01m/s
流量测量
流量=平均流速x过流断面面积x修正系数
平均流速由流速计采集流体表面流速，并经过模型计算得到
过流断面面积由水位计测得的水位以及断面信息算出
雨量监测
测量范围：雨强0～4mm/min
测量精度：±0.2mm
分辨率：0.2mm
承雨口径：φ200mm
供电方式：太阳能电池板+蓄电池组合供电
太阳能功率：100W（选配）
蓄电池参数：DC3.7V 10Ah
支架高度：立杆3米横臂3米
工作环境：-45℃～85℃（不结冰状态）
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明渠流量监测站广泛应用于以下场景：实时监测河流、渠道中的水位和流量，为防汛抗旱提供及时准确的数据支持。在防汛抗洪工作中，通过实时监测河流流速和流量，为洪水预警提供关键数据，帮助相关部门提前做好防洪准备。帮助水利部门了解渠道中的水量分布情况，制定合理的水资源调度方案。准确掌握河流水量变化，有助于合理分配水资源，保障工农业生产和居民生活用水需求。实时监测灌溉渠道的水流情况，确保灌溉水量的准确性和及时性
雷达明渠流速测流系统采用非接触式测量方式，不与水体直接接触，避免了传统测流方式中设备易被腐蚀、堵塞的问题，提高了设备的使用寿命和稳定性。该系统能够高精度地测量水体表面的流速，并结合水位数据准确计算出流量。同时，它不受温度、湿度、降雨、水深、浑水、水面漂浮物等因素的影响，确保了测量的可靠性和准确性。不受天气条件的限制，能够24小时不间断地进行监测，非常适合在灌区、河道等明渠渠道进行流量测验。
灌区流量监测系统广泛应用于河流、水库、农田灌溉、城市排水系统等领域，为水资源管理、防洪减灾和环境保护提供了重要的技术支持。具体来说：能够实时监测水源地的进水流量，确保供水系统的稳定输入;同时通过对泵站出水口流量的监测，可以精确控制泵站的运行效率，避免水资源的浪费。
明渠流量监测系统使得测量精度大幅提高，能够准确反映明渠中的微小流量变化。非接触式测量避免了传统接触式测量可能带来的污染和磨损问题，保证了长期测量的稳定性和准确性。实时监测具备实时监测和数据传输能力，确保决策者能够迅速获取最新数据并及时做出响应。多功能集成通常可同时测量水位、流速、流量、累计流量等多个参数，功能强大。安装方式简单灵活，不需要对河道进行大规模改造或水下作业;维护工作也相对较少。
水库流量实时监测设备利用多普勒效应测量水流速度。当雷达传感器向水面发射微波信号时，信号遇到运动的水面会发生散射并构成回波。由于接收到的回波频率相对于发射频率发生一定偏移，因此可以通过多普勒频率方程求得水面流速。雷达明渠流量监测站的工作原理基于非接触式测量技术。它利用雷达波(通常是微波)作为测量媒介，通过发射雷达波并接收其从水面(及可能的水底)反射回来的信号，根据雷达波的传播时间或频率变化来精确计算
