喷雾机喷杆拉力测量试验

Experimental study on sprayer boom tension measurement

针对某水旱两用喷杆喷雾机喷杆连接件断裂问题,开展喷雾机喷杆田间拉力测量试验.针对喷杆组件结构和受力特点,开发设计了喷杆拉力测量系统并进行静态标定.在田间设置喷雾机试验跑道,分别进行1.93、1.42、0.90 m/s 3种速度的喷杆拉力数据采集.结果表明,最大拉力随喷雾机速度的增大而增大.基于耿贝尔极值理论,对3种速度下的最大静态拉力进行推理,3种速度条件下最大拉力分别为1 000、700、500 N.对采集数据进行频谱分析,发现喷杆拉力信号主要是0～13 Hz以内的低频信号。

Field experimental study on sprayer boom tension measurement was carried out due to me Boom eomtcutor fracture problem of the amphibious boom sprayer. The sprayer boom tension measurement system was developped according to the boom assembly structure and force characteristics, and the static calibration of tension sensors was carried out. The sprayer runway was set in the field, then boom tension data acquisitions were obtained with three sprayer speed 1.93, 1.42, 0.90 rrds. The acquisition results showed that, the maximum tension increased as the sprayer speed increased. The maximum static tensions of the boom with three different machine speeds were reasoned according to the Gumbel extreme value theory, and the maximum tensions were 1 000, 700, 500 N, respectively for the three sprayer speeds. The data spectrum analysis was conducted based on the acquisited data and it was found the boom tension signal was mainly low frequency signal within 0～13 Hz.