| 摘要 |
The properties of a resinous material product are controlled in a manufacturing system by on-line process parameter monitoring and control. The on-line monitoring and control incorporates an <i>in-situ</i> measurement system that can monitor and control product in a process; and does not require the removal of any sample material from the process. It uses an ultrasonic analyzer system (12, 20), consisting of ultrasonic transducers (24, 25), cables, pulser, receiver, waveform digitizer, signal processor, data processor, computer, temperature measurement device (30) and a pressure measurement device (31). The on-line real-time ultrasonic analyzer system (12, 20) measures the acoustical properties (for example, velocity, attenuation) of the product, predicts the property of the product, and provides the process control system with analysis of the acoustical properties using derived relationships between the physical properties of the product and the acoustical properties. Differences between the predicted and desired product properties are used to control process parameters. The process can be used for a variety of chemical process plants. |
