测量弹性体碰撞的光子多普勒测速仪
Frequency-Shifted Photonic Doppler Velocimetry for Measuring Collision of Elastomers
高瑞休 1刘岚岚 2王健 1王凯宏 1黄子赫 1吴重庆3
作者信息
- 1. 北京交通大学唐山研究院,发光与光信息技术教育部重点实验室,北京 100044
- 2. 北京交通大学唐山研究院,发光与光信息技术教育部重点实验室,北京 100044;北京交通大学物理科学与工程学院,北京 100044
- 3. 北京交通大学唐山研究院,发光与光信息技术教育部重点实验室,北京 100044;南京恒高光电研究院有限公司,江苏南京 210046
- 折叠
摘要
弹性体碰撞过程的研究对于缓冲减震应用有重要意义,但因为存在反弹现象,过程复杂,一般设备不能很好地测量.提出一种双光源的频移光子多普勒测速仪(Photonic Doppler Velocimetry,PDV)研究弹性弹丸的碰撞过程.使用两个激光器提供的信号光和参考光产生差频信号,解析得到速度的大小和方向.实验结果表明:弹丸撞击钢板后速度在0.1 ms内降为零,并在回弹后 1ms出现了多次的往返运动.通过监测两个激光器的频差,可在一定程度上减小激光器频率不稳而引起的误差.
Abstract
The study of elastomer collision processes is important for cushioning and vibration damping applications,but it is difficult to measure with general equipment because of the presence of rebound phenomena and the complexity of the process.A frequency-shifted photon Doppler velocimetry(PDV)using two laser sources is proposed to study the collision process of elastic projectiles.The magnitude and direction of velocity are obtained by analyzing the beat frequency signal,which is generated by the reference and signal beam provided by two lasers.The experimental results show that the velocity of the projectile decreased to zero within 0.1ms after impacting the steel plate,and several round-trip motions occurred 1ms after rebound.Errors due to laser frequency instability are reduced by monitoring the frequency difference between the two lasers.
关键词
弹性体碰撞/光子多普勒测速/外差激光干涉测量/频移PDV/回弹运动Key words
elastomer collision/photonic doppler velocimetry(PDV)/heterodyne interferometric measurement/frequency-shifted PDV/rebound motion引用本文复制引用
基金项目
河北省重大科技成果转化专项-北京交通大学唐山研究院合作共建科技平台示范基地项目(23267601Z)
出版年
2024
NETL
NSTL
万方数据