Open AccessLase Ultrasonic Web Stiffness tester
Author(s) -
Tim Patterson,
Ipst at Ga Tech
Publication year - 2009
Language(s) - English
Resource type - Reports
DOI - 10.2172/945369
Subject(s) - ultrasonic sensor , stiffness , sign (mathematics) , transducer , ultimate tensile strength , acoustics , structural engineering , engineering , computer science , materials science , physics , mathematics , composite material , mathematical analysis
The objective is to provide a sensor that uses non-contact, laser ultrasonics to measure the stiffness of paper during the manufacturing process. This will allow the manufacturer to adjust the production process in real time, increase filler content, modify fiber refining and as result produce a quality product using less energy. The sensor operates by moving back and forth across the paper web, at pre-selected locations firing a laser at the sheet, measuring the out-of-plane velocity of the sheet then using that measurement to calculate sheet stiffness