【摘要】 地下铲运机在工作过程中对铲斗物料进行自动称重,当前实际应用中多采用测量举升大臂油缸的油压来计算铲斗中物料的质量。此方案中称重精度的提高是难点,误差产生的原因包括:1)工作机构的摩擦阻尼、地面不平、称重物料重心的变化等客观原因;2)称重模型较为复杂,目前理论分析有不足之处,导致推导的称重计算公式不够精确,只能运用插值、区间测量等手段缩小误差。通过对铲运机称重的力学模型进行分析,设计适合实际应用的称重方案,对此方案推导出更加完善的称重计算公式。找到油压值随举升速度变化的规律,给予合理的理论解释,并做了大量的试验进行验证,形成一套既有理论支撑、同时可应用于工程实际的高精度的地下铲运机动态称重方案。更多还原

【Abstract】 It is the common method in the practical application that measuring the hydraulic pressure of the lifting cylinder for calculating the quality of ore in the bucket of working LHD.Improving the accuracy is difficult.The first difficulty is due to the objective reasons such as friction damping of the working mechanism,bumpy road,the different gravity of ore in the bucket.The second difficulty is due to theoretical analysis has deficiency on the complex model,which makes the weighing calculation formula is not precise enough,only by using the interpolation and interval measurement to reduce the error.It analyses the mechanics model of LHD in this paper,designs a suitable system in practical application.Especially it finds the rules between the hydraulic pressure and the lifting speed of the arm.It gives a reasonable theoretical explanation and tests the rules with many experiments.更多还原