Development of drone-type float for surface-velocity measurement in rivers
Development of drone-type float for surface-velocity measurement in rivers
复制标题
开发用于河流表面速度测量的无人机型浮标
DOI：
10.1007/s10652-022-09874-1
复制
发表时间：
2022
影响因子：
2.2
通讯作者：
Takaaki Okamoto
中科院分区：
文献类型：
--
作者：
Michio Sanjou;Kyohei Kato;Wataru Aizawa;Takaaki Okamoto
本研究开发了一种测量河流自然流量的安全测量系统。河流监测对河流环境保护和防洪具有重要意义。新系统是一种带有全球定位系统（GPS）接收器的无人机式浮筒，可以安全快速地监测河流。该浮体根据操作者的控制飞向自由表面上的目标点。之后，它自由地向下游运行，利用实时动态GPS方法以厘米级精度检测自定位时间序列。在下游漂流过程中，它还使用超声波传感器测量当地的水深。在所有测量线上重复进行相同的工作，以通过目标横截面评估流量。为了提高测量精度，引入了考虑风效应的数据修正公式。我们在自然河流中进行了实地试验，获得了可靠的实际应用结果。该系统可以在不使用观测桥和橡皮艇的情况下，对250米宽的大型河流进行流量评估。
The present study develops a safety survey system for measuring natural river discharge. Monitoring of rivers is very important for river environment conservation and flood prevention. The new system is a drone-type float with a Global Positioning System (GPS) receiver, which can safely and quickly monitor a river. This float flies to the target point on a free surface according to the operator’s control. After which, it runs freely downstream, detecting the time-series of self-position with a centimeter-order accuracy using the real-time kinetic GPS method. It also measures the local water depth using an ultrasonic sensor during the drifting downstream. The same works are repeatedly conducted on all survey lines to evaluate the discharge through a target cross-section. The data correction formula considering the wind effects is introduced to improve the measurement accuracy. We performed field tests in natural rivers and obtained reliable results for practical application. The present system can evaluate the discharge in a 250 m width large-scale river without using an observation bridge or a rubber boat.