基于无人机航摄的水库大坝泄水波测量方法

Measurement method of reservoir dam discharge wave based on UAV aerial photography

为避免发生城市内涝灾害,目前多采用常规的水库大坝泄水波测量方法对水库泄洪过程中产生的泄水波进行测量,但该测量方法在图像处理上存在处理时间较长、误差值较大等问题。因此,本文提出基于无人机航摄的水库大坝泄水波测量方法。该方法首先将扫描坐标系与图像坐标系进行转换,以畸变差计算过程作为基础,进行无人机图像矫正;然后,将完成修正的图像作为泄水波的测量数据来源,确定基线长度,实现泄水波测量标定。通过构建仿真试验环节,与文献[4]方法和文献[5]方法对比可知,该方法的测量处理时间与误差值的试验结果均优于传统方法。

In order to avoid urban waterlogging,the water discharge wave measurement method of reservoir dam is mostly used to measure the water discharge wave generated in the process of reservoir flood discharge.However,the design of this measurement method in image processing has some problems,such as long measurement processing and large error.Therefore,this paper proposes a method for measuring the discharge wave of reservoir dam based on UAV aerial photography.Firstly,the scanning coordinate system is converted to the image coordinate system,and the UAV correction is carried out based on the calculation process of distortion difference.Secondly,the corrected image is used as the measurement data source of discharge wave to determine the baseline length and achieve the measurement and calibration of discharge wave.By constructing the simulation experiment and comparing with the methods introduced in literature[4]and literature[5],it can be seen that the experimental results of the processing time and error of this method are better than those of traditional ones.