知识与财富的链接
为研究影响白萝卜拔取力的关键因素,设计一种白萝卜拔取装置.该装置采用直流电机驱动,利用钢丝绳连接夹持器拉拽白萝卜缨叶,并由计算机记录拔取过程中的拔取力峰值和时长.以'捷夏美 50'白萝卜为试验材料,分析白萝卜拔取受力情况,确定以白萝卜拔取装置的拔取线速度、拔取角度、夹缨高度和土壤含水率为试验因素,白萝卜拔取力峰值为试验指标,进行单因素和响应面法试验,探究各试验因素对白萝卜拔取力峰值的影响,进而确定白萝卜拔取装置的最佳工作参数为夹缨高度 1 cm、拔取线速度 0.03 m/s、拔取角度为 35°、土壤含水率 21.63%,此时,白萝卜拔取力最小,拔取力峰值为 52.5 N,该结果与白萝卜最小拔取力峰值预测结果具有良好的拟合性.
In order to study the key factors affecting the extraction force of white radish, an extraction device for white radish was designed. The device was driven by DC motor, and was designed to pull white radish leaves using a gripper connected to a wire rope. The peak value and duration of extraction force were recorded by computer. ‘Jixiamei 50’ white radish was used as test material, the extraction force of white radish was analyzed in this study. The extraction line speed, extraction angle and clip height of white radish extraction device and soil moisture content were determined as test factors, and the extraction force peak value of white radish was determined as test index. Single factor and response surface tests were carried out to explore the influence of each test factor on the extraction force peak value of white radish. Then, the optimum working parameters of the extraction device for white radish were determined to be the clip height of 1 cm, the extraction line speed of 0.03 m/s, the extraction angle of 35°, and the soil moisture content of 21.63%. With these conditions, the extraction force of white radish was the minimum, and the extraction force peak value was 52.5 N, which had a good fit with the prediction results of the extraction force peak value of white radish.