基于摄影测量的多瓣液压抓斗运动监测系统设计及应用分析

Design and Application Analysis of Multi-Lobe Hydraulic Grab Motion Monitoring System Based on Photogrammetry

【目的】多瓣液压抓斗是散货起重设备的核心附加属具。由于实际工况下的现场环境通常较为恶劣,为保证生产安全,提高工作效率,需要对其运动状态进行实时监测。【方法】基于双目视觉测量原理,设计了一种基于摄影测量的多瓣液压抓斗运动监测系统,通过对抓斗运动特征点位置的在线测量,获取液压杆的位移量和抓瓣的转动角度,从而实现对抓斗运动状态的实时监测。【结果】试验结果显示,针对不同特征点测量所计算出的运动状态参数具有较好的一致性,部分标志点被遮挡时能够保证测量过程不中断。【结论】所设计的多瓣液压抓斗运动监测系统能够对颚板的运动状态进行实时监测,满足复杂工况下的现场应用需求。

[Purposes]Multi-lobe hydraulic grab is a core additional accessory of bulk fetching device.Due to the harsh on-site environment under actual working conditions,real-time monitoring of its move⁃ment status is necessary to ensure production safety and to improve work efficiency.[Methods]In this work,binocular vision measurement method is utilized to design the motion monitoring system for multilobe hydraulic grab based on photogrammetry.By online measuring the position of the grab motion fea⁃ture points,the displacement of the hydraulic rod and the rotation angle of the grab can be obtained to re⁃alize real-time monitoring of the grab motion status.[Findings]The calculated results from different markers show good consistency,which ensures the continuity of the measurement process.[Conclusions]The designed motion monitoring system can monitor the movement status of multi-lobe hydraulic grab in real-time,meeting the on-site application requirements under complex working conditions.