【摘要】 本文利用DS2型全信息声发射信号分析仪构建了可以快速测量并计算出小球与平板之间弹性碰撞恢复系数及重力加速度的实验测量系统。通过实时记录小钢球与瓷砖地面之间,玻璃球和弹力球与钢板之间3种不同碰撞模式下的碰撞全波列,本文分析获取了相邻两次碰撞之间的时间间隔序列T_n,并建立了lnT_n与碰撞次数n之间的线性关系,从而实现对弹性碰撞恢复系数及重力加速度的快速测量与分析。实验测量表明,弹性碰撞恢复系数与重力加速度快速实验测量系统具有实验原理简单、清晰,记录的碰撞波形清晰、完整,实验测量精度高和稳定性好的特点。更多还原

【Abstract】 The quickly measurement system for the restitution coefficient of elastic collision and the acceleration of gravity between small ball and plate has been established by using DS2 type acoustic holography emission signal transmitter.The full wave has been real-time recorded for three different collision modes including the collision between small steel ball and ceramic ground,the collision between glass ball and steel plate,and the collision between bouncing ball and steel plate.According to the time interval between two adjacent collision sequence T_n,the linear relationship between lnT_nand collision number nhas been given out,so the restitution coefficient and the acceleration of gravity can be quickly measured.The experimental measurements showed that this measurement system has these advantages such as the simple and clear principle,the clear and completed record of collision waveform,the high precision,and the good stability characteristics.更多还原