9/48 7.1.1 Flow Visualization -PIV Principle Universal mount and shutter Laser light Fiber manipulator sheet optics Laser Fiber optic cable Shutter drive unit CCD camera Computer with two monitors Timing box Fig.7.1(b)Particle Image Velocimetry.Using CCD camera to record images A complete system consists of a laser light source with optics,an image recording medium,a programmable time delay and sequence generator,camera interface,computer,and image acquisition/analysis software. 10/48 7.1.1 Flow Visualization -PIV Principle Fig.7.2 PIV Image of Transient Vortex(Structure in a Circular Jet Under good conditions and with proper equipment and technique,the accuracy of PIV technique is adequate for many applications Demonstration webpage:http://www.piv.de/piv/index.php7.1.1 Flow Visualization – PIV Principle Fig. 7.1(b) Particle Image Velocimetry. Using CCD camera to record images A complete system consists of a laser light source with optics, an image recording medium, a programmable time delay and sequence generator, camera interface, computer, and image acquisition/analysis software. 9/48 7.1.1 Flow Visualization – PIV Principle Fig. 7.2 PIV Image of Transient Vortex (漩涡) Structure in a Circular Jet Under good conditions and with proper equipment and technique, the accuracy of PIV technique is adequate for many applications Demonstration webpage: http://www.piv.de/piv/index.php 10/48