Author :
Publisher :
Page : 141 pages
File Size : 20,61 MB
Release : 1991
Category : Acoustic emission
ISBN :
Book Description
This report surveys the scientific literature for all process monitoring techniques and identifies four types of measurements that show the most promise for on-line, real-time process monitoring. These are ultrasonics, dielectrics, optics, and spectroscopic methods. The four types are reviewed in depth and compared with each other in the areass of measurement speed, sampling volume, sensitivity to different resins, effects of fiber type, resistance to the manufacturing environment, interpretation of the data, adaptability for other uses, and temperature capabilties. In addition, brief reviews are provided on temperature and pressure sensors, and process modeling, since the future for on-line process control relies on developments in these areas as well. Industrial needs and opportunities, off-line measurement techniques, and major industrial and governmental programs on process control are commented upon.