Research On The Foreign Fibre Detection System And Its Hardware Design

Detecting impurity for cotton is an important part for all detecting cotton work. Throughdetecting impurity, we may know the impure content in the cotton. Inspecting amount of impurityand analyzing kinds of impure cotton help to improve on technologic methods for elementaryprocessing cotton and lint of good quality. According to impurity inspection, spinning mill couldaccurately compute the amount of cotton required and through adopting the correct technologicmethods, finished yarn could decrease the defects, reduce the cost, improve the quality anduniform the strips. So impurity inspection is very important. The thesis mainly describes detecting system is developed for the impurity detection. Thesystem is base on fixed signal processor ADSP-21535 to do the high-speed real time imageprocess to clean out the foreign fibre. The core of the system is industry PC,CPLD and FPGAprovide the system logical control signals. System include CCD camera, ADSP-21535 DSPboard,I/O control board base on FPGA,industrial PC etc. The system sample data by CCD camera, process the data by DSP using designed algorithmand harmonize the peripheral equipments by PC for sorting the impurity and displaying the cottonin the pipeline . The DSP subsystem is the main part of the signal process segment. It is setted into theindustry PC by PCI add-in card form.Through PCI slot we can effectivly use the PC`s resource,reduce the cost of system development. Especially through the graphics interface of the PC, debugDSP system become very convenience. So it has very wide application meaning.This thesis ismainly describe the hardware design,detecting algorithm,and part of software design of thesystem.. Firstly, the thesis introduces the development background of the foreign fibre detection. Then,It sets forth in turn the core, system scheme design, system hareware design, and application ofADSP-21535.