Embedded Doppler System for Industrial In-Line Rheometry

作者：Ricci Stefano^*; Liard Maxime; Birkhofer Beat; Lootens Didier; Bruehwiler Armin; Tortoli Piero

来源：IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2012, 59(7): 1395-1401.

DOI：10.1109/TUFFC.2012.2340

Rheological fluid behavior characterization is crucial for the industrial production of cosmetics, food, pharmaceutics, adhesive, sealants, etc. For example, the measurement of specific rheological features at every step of the production chain is critical for product quality control. Such measurements are often limited to laboratory tests on product specimens because of technical difficulties. In this work, we present an embedded system suitable for in-line rheometric evaluation of highly filled polyurethane-based adhesives. This system includes an ultrasound front-end and a digital signal processing section integrated in a low-cost field-programmable gate array. The system measures the real-time velocity profile developed in the pipe by the fluid, employing a Doppler multi-gate technique. The high-resolution velocity profile, combined with a pressure drop measurement, allows an accurate evaluation of the flow consistency index, K, and the flow behavior index, n, of the interrogated fluid.

• 出版日期2012-7