کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1467722 | 990115 | 2007 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Electric time-domain reflectometry distributed flow sensor Electric time-domain reflectometry distributed flow sensor](/preview/png/1467722.png)
Liquid composite molding (LCM) has become an important processing technique to manufacture high-performance composite parts. The sensing of the process parameters, such as resin fill of the porous material, are key to improve repeatability, maximize quality and minimize cost. This paper describes a distributed flow sensor, which considerably decreases tooling integration costs and improves spatial resolution by allowing sensing of hundreds of sensing elements with a single input/output port. The transmission line sensor is virtually divided into a large number of small discrete transmission lines treated as a long array of sensing elements. Piecewise sensing is achieved by electric time-domain reflectometry and inversion of a non-uniform transmission line model. The paper describes the distributed sensing approach, experimentally validates distributed sensing in a LCM setup, and analyzes critical sensor parameters.
Journal: Composites Part A: Applied Science and Manufacturing - Volume 38, Issue 1, January 2007, Pages 138–146