Hard sweeping survey is a traditional surveying technique for finding underwater shallow point and other obstruction,which is still widely used in mountainous waters and upstream waterways of rivers.At present,the process of hard sweeping survey is relatively outdated,and the key processes such as determining the depth of the sweep bar,monitoring the swing state of the sweep frame,and judging the bottom striking event are still carried out manually,which is difficult to ensure the standardization in operation and the reliability of the survey results.In this paper,based on the actual demand of hard sweeping survey,the digital monitoring system of hard sweeper is designed.Based on the swing characteristics of the sweeping frame in the process of the sweeping survey,an automatic detection method of the bottom striking event of the hard sweeping survey is mainly studied.Through the short-time spectrum analysis and dynamic filtering of the swing data of the sweeping frame,the detection of the step anomaly of the bottom striking event,the detection of the peak anomaly of the bottom striking event,and the multi-scale comprehensive judgment,the accurate judgment of the shallow point striking event of the hard sweeping survey can be realized.Based on the software and hardware system developed for automatic monitoring of hard sweeper,sample data are collected.The test results of the sample data show that compared with the traditional 3 times standard deviation judgment method,the accuracy of the shallow point bottom event judgment method presented in this paper is greatly improved.The digital monitoring technology of hard sweeper and the automatic detection method of shallow point striking event designed and researched in this paper are of great significance to improve the efficiency,science and standardization of hard sweeper.
关键词
航道整治/水下碍航物/硬式扫床/清礁检测/浅点检测
Key words
waterway regulation/underwater obstruction/hard sweeping survey/underwater rock cleaning detection/shallow spot detection
维普
万方数据