A Design Of Multi-cycle Jig Controlling System Based On PIC16F887

The way to obtain clean coal in China is mainly achieved through jigging coal preparation technology,and jigger has always been playing a very important role in the jigging coal preparation.However,due to a variety of factors in the process of jigging coal preparation,which are not independent but connected in certain ways.This makes the process hard to control and the efficiency of sorting raw coal is lowered as well.In general,the jigging process can be divided into two steps:the first step is to stratify the raw materials,the second step is the separation of clean coal.And the full separation of raw materials is an important prerequisite for separation of clean coal,so the key part of jigging coal preparation is to separate the raw materials into different layers according to the density through the flowing water in the jigging room.The trajectory of the flow directly affects the separation of raw materials.The jigging curve that we studied is actually the movement trajectory of water,so changing the cycle of jitter curve can change the stratification of raw materials.This system design is to a test device that can achieve a variety of jogging cycles.The system uses LCD12864 LCD screen as a display and user interface,with a dedicated button to set and send control commands.Using high reliable PIC16F887 as a control chip,outputting PWM pulse to control the stepper motor rotation trajectory,and promoting the diaphragm movement,the system can achieve multi-jitter cycle jog mode.During the experiment,high-speed cameras and corresponding image processing software Pro Analyst were used to measure the waveforms of the jets in the jogging room.The corresponding jigging parameters were compared with the theoretical values.The controlling system is finally finished by comparing and verifying many experimental results.