基于PIC16F887的多周期跳汰机控制系统设计

发布时间：2018-05-10 15:41

本文选题：跳汰机 + 跳汰周期　；参考：《安徽理工大学》2017年硕士论文

【摘要】：我国精煤的获取途径主要是通过跳汰选煤技术来实现的,而跳汰机在跳汰选煤中一直扮演着一种极其重要的角色。但是由于在跳汰选煤的过程中会受到多种因素的影响,往往这些影响因素之间并非独立而是有一定的联系,不好控制,使得对原煤的分选效率也会大大下降。一般来说跳汰过程可分为两个步骤:第一步是对原料进行分层,第二步是精煤的分离。而充分的原料分层又是精煤分离的重要前提,因此跳汰选煤最主要的核心部分是通过跳汰室内运动的水流对原料按密度的不同进行分层,水流的运动轨迹直接影响原料的分层效果。我们所研究的跳汰曲线实际上就是研究水流的运动轨迹,因此通过适当的改变跳汰曲线的周期观察能否改变原料的分层效果,本系统设计的目的就是实现多种跳汰周期的试验装置。本系统采用LCD12864液晶屏作为显示和操作界面,配合专用的按键进行设置并可发送控制命令。选用可靠性高的PIC16F887作为控制芯片,输出PWM脉冲来对步进电机的转动轨迹进行控制最后带动隔膜运动从而实现多跳汰周期的跳汰模型设计。实验过程中利用高速摄像机以及相应的图像处理软件ProAnalyst来测得跳汰室内水流脉动的波形,得到相应的跳汰参数与理论值相比较看两者是否吻合,最后经过多次实验的验证完成了本控制系统的设计。
[Abstract]:The way of obtaining clean coal in our country is mainly realized by jigging technology, and jig has always played an extremely important role in jigging. However, due to the influence of many factors in the process of coal jigging, the separation efficiency of raw coal will be greatly reduced due to the fact that these factors are not independent but have a certain relationship, which is not easy to control. Generally speaking jigging process can be divided into two steps: the first step is to stratify the raw material and the second step is to separate the clean coal. Sufficient stratification of raw materials is also an important prerequisite for separation of clean coal. Therefore, the most important core part of jig coal preparation is the stratification of raw materials according to different densities through the flow of moving water in jigging chamber. The movement track of the flow directly affects the stratification effect of the raw material. The jig curve we're studying is actually studying the trajectory of the water flow, so by changing the cycle of the jig curve appropriately, we can see if we can change the stratification effect of the raw material. The purpose of the system design is to realize a variety of jigging cycle test equipment. The system uses LCD12864 LCD screen as display and operation interface, with special keys to set and send control commands. The reliable PIC16F887 is used as the control chip, and the PWM pulse is output to control the rotation trajectory of the stepping motor. Finally, the diaphragm motion is driven to realize the jig model design of multi-jigging cycle. In the process of the experiment, the high speed video camera and the corresponding image processing software ProAnalyst are used to measure the wave of water flow pulsation in jig chamber, and the corresponding jig parameters are compared with the theoretical values to see if they agree with each other. Finally, the design of the control system is completed after many experiments.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD455.1

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