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1.前言矿山或作为建设机械用于破碎的凿岩机和碎石器由过去的气动变为液压,向省力化、高性能化进一步发展,性能更加提高。在凿岩机和碎石器的机械性能评价方面,由于受冲击对象和试验装置的刚性影响,冲击力的测定会产生差异,所以由冲击时的活塞速度算出冲击能是一种有效的方法。但是,象液压碎石器的活塞行程大、速度高,对冲击时活塞位移的测定,使用非接触位移计是必不可少的。非接触位移计有电涡流、差动变压
1. Foreword Mine or rock drilling machine and stone crusher, which are used as construction machinery for crushing, have been changed from pneumatic to hydraulic in the past and have been further developed to reduce labor and high performance, resulting in higher performance. In the evaluation of the mechanical properties of rock drills and stone devices, the determination of the impact force is different due to the rigidity of the impact object and the test apparatus. Therefore, it is effective to calculate the impact energy from the impact of the piston speed. However, as the piston hydraulic stroke hydraulic device large stroke, high speed, the impact of the piston displacement measurement, the use of non-contact displacement meter is essential. Non-contact displacement meter eddy current, differential transformer