The Research Of Quartz Color Detection Technology And Equipment

Quartzite particles are the core of the silicon raw materials, which play an irreplaceable role in the production and supply of the silicon, and high purity quartzite have higher value than low purity quartzite. There are still some few impurities in quartzite screened by magnetic process and floatation method. At present, nobody introduces a good method that removes those impurities. The thesis presents a method which removes impurities in different colors from preliminarily screened quartzite by using photoelectric technology.The thesis mainly studies the quartzite color detection system; design a photoelectric detection system and a servo system. The operating principle of detection system is scanning the falling grainy materials in high speed by CCD sensor. The CCD output signal through the image digitizer which includes the image signal conditioning, A/D converter is high-rate processed by FPGA. Then the detection system sends out removed signals to servo-control system.The hardware design of detection system includes the core circuit of FPGA; drive circuit of CCD; the interface circuit of digitizer; communication circuit. The hardware design of servo system includes drive circuit of servo system; communication circuit of servo system; protect circuit of servo system. Printed circuit board is designed following request.The software designation of detection system includes the driving time sequence designation of CCD; related double sampling time sequence design; constituting communication protocols; collection and treatment of image data; designing adjustable delay time of detection system; driving designation of servo-control system; and storing and displaying image data of CCD. The software designation of servo system includes programming of protecting servo-actuator signal programming of detection system and so on.Using Verilog language to program and taking top-down method. Using the platform of ISE8.2, Synplify Pro8.1, Modelsim6.1 software has completed the simulation, synthesis, and emulation of every program. Debugging and proving FPGA on line through ChipScope. After debugging, the detection system can complete collection and treatment of image data, and outgo servo-control and performer's driving signal to drive exactly servo-control system and performer to screen quartzite.