Divisional velocity measurement for high-speed cotton flow based on double CCD camera and image cross-correlation algorithm

Abstract

A method of gas-solid two-phase flow velocity measurement is presented based on double linear CCD camera and image cross-correlation algorithm, and it can be applied to cotton foreign fiber eliminating system. Firstly, gas-solid two phase flow velocity estimation principle is put forward with the double linear CCD camera. Then, aiming to the inaccurate problem of cotton flow velocity measurement using ultrasonic wind speed sensor, and based on the detection system structure, double CCD camera cotton flow velocity measurement scheme is discussed. Lastly, divisional velocity measurement for high-speed cotton flow based on the image cross-correlation algorithm is elaborated. The results showed that this method accurately estimated the velocity of cotton flow in different sub-area, and reduced the cotton fall quantity at each blowing, which proved the validity of the proposed method.