MEASUREMENT OF FIBER TUFT WEIGHT IN AN AIR DUCT USING OPTICAL METHODS

The feasibility of using a Charge-Coupled Device (CCD) linescan camera to evaluate the weight of fibre tufts moving in an air duct is report ed. A theoretical study of the measurement of the light transmission o f fibre tufts is presented and the theoretical models are verified by experimental results. The accuracy of the results is improved by a mod ification of the air duct shape. The fibre tuft speed and the optical uniformity are also discussed.