【作者】 陈超； 黄卫清； 郭俊杰； 赵淳生；

【Author】 Chao CHEN,Wei-qing HUANG,Jun-jie GUO,Chun-sheng ZHAO Precision Driving Laboratory,Nanjing University of Aeronautics & Astronautics,Nanjing,Jiangsu 210016,China

【机构】 南京航空航天大学精密驱动研究所；

【摘要】 提出了一种可用于外太空探测和取样的超声波/声波钻探采样器。该采样器钻进压力较小,可有效缓解岩石对钻探器的反冲击力,减少消耗宝贵的能量。超声波/声波钻探采样器利用了压电材料的逆压电效应,驱使换能器产生超声波频域内的振动,通过巧妙的自由质量块设计实现超声波/声波振动能量耦合与转换,使得钻杆(钻头)部分获得较大的声波频域振动能量来钻碎岩石而获取样品。建立了超声波钻探器的有限元模型,通过结构动力学分析,确定了钻探采样器的结构方案。研制了原型样机,初步的钻探实验结果表明,钻探采样器不必施加额外的轴向力即可破碎岩石介质。更多还原

【Abstract】 A novel Ultrasonic/sonic Driller/Corer(USDC) has been developed for deep space exploration.This low axial load is required and few impact forces are produced for the USDC to sample rocks,which results in the impcrtant advantage of low energy dissipation.Based on inverse piezoelectric effect,the ultrasonic vibration is induced for the transducer of the USDC.The ultrasonic/sonic vibration energy conversion and coupling exists between the ultrasonic transducer and drill stem through the smart design of free mass.In this way the drill stem with the considerable sonic frecquency can sample the rocks.In this paper the finite element model of the USDC is built and the dynamic analysis is conducted.The prototype is manufactured and the experimental results show that the USDC can dig into the rocks without extra axial forces.更多还原