Abstract
This paper developed a new device which is able to identify the unknown water flow resistance of elastic tubes from a direct part of the measured water pressures by circulating pulsatile water flow in tubes with a roller pump. The device consists of two pressure sensors, A/D transducer board, one roller pump with constant revolutional speed, a low-pass filter to cut off high frequency noise, and microcomputer with a special software to identify the unknown parameters of the tube. The water flow resistance R is identified by the on-line nonlinear least squares method.
