DEVELOPENT OF EQUIPMENT FOR FAULT RECOGNITION OF FABRIC BY USING ANALOGUE TECHNIQUE

Abstract

A fault recognition equipment of fabric applying the pattern recognition method was developed and the basic function for it were tested.
The essential features of the equipment are composed of two parts, one is the detector to detect the reflected light from cloth or the transmitted light through it. The other is the operational circuit for sending and operating of informations from detector.
The experimental procedures for detecting of information and fault recognition are as follows; (a) the fabric is irradiated by the incoherent light, (b) the intensity of reflected light from it and transmitted light through it are converted to electricity by photo-transistors, (c) two input voltages are compared with the each standard voltages. Furthermore, parts of input voltages which are over the standard voltages are picked out. The picked out parts are output of the circuit.
By basic examining of the fault recognition of fabric using the equipment, the following results are obtained:
1) Fault parts of fabric structure and of surface are also detected.
2) On the same sample fabric, the change of scanning angle has effects upon the signal waveforms.
3) A diameter of scanning spot must be smaller than that of warp and weft.
4) The equipment is relatively simple because the sending and operating of information are processed by the analogue technique.