Acquisition of a Scanning Laser Vibrometer

9871288PaiThe overall objective of the award is to purchase a Polytec PSV-200 Scanning Laser Vibrometer（SLV）and to 1）integrate it into the existing research setups of the investigators，2）strengthen new collaborative research between the PI，and with other researchers，3）integrate it into selected university and graduate courses in the Department of Mechanical and Aerospace Engineering at the University，以及4）使设备可用于大学的其他研究人员。 SLV通过测量从移动表面反射的激光束的频率变化来测量振动表面的速度。 与加速度计的机电原理物理上不同，SLV提供非接触式测量，更精细的速度分辨率，更宽的工作动态范围，以及具有超高光学灵敏度的全自动扫描封装中的更高线性度。

9871288PaiThe overall objective of the award is to purchase a Polytec PSV-200 Scanning Laser Vibrometer (SLV) and to 1) integrate it into existing research setups of the investigators, 2) strengthen new collaborative research between the PIs, and with other researchers, 3) integrate it into selected undergraduate and graduate courses in the Department of Mechanical and Aerospace Engineering at the University, and 4) make the equipment available to other researchers at the University. An SLV measures velocities of a vibrating surface by measuring the change in frequency of a laser beam reflected from the moving surface. Physically different from the electro-mechanical principles of accelerometers, the SLV offers non-contact measurements, a finer velocity resolution, a wider operating dynamic range, and higher linearity in a fully automated scanning package with ultra-high optical sensitivity.