微机控制恒应力水泥压力试验机论文.doc

文档介绍：济南大学泉城学院毕业论题目微机控制恒应力水泥试验系统设计专业机械设计制造及其自动化班级机设 07Q1 学生杨志罡学号 20073006121 指导教师王新华二〇一一年五月二十六日摘要全自动水泥试验机是一种机电化产品。主要由微机、液压泵、溢流阀、电液比例阀、压力传感器等组成。该系统采用计算机作为主控制器,通过外部设备,对试验参数进行设定。其工作过程为:首先由计算机发给控制器试验信号,控制器对液压缸进行检测,把检测到的电压信号经过 A/D 转换和放大后传给计算机。计算机实现液压系统的比例控制,来达到设计的要求。关键词: 试验机;液压泵;电液;比例阀;压力传感器; PID ABSTRACT Automatic electro-pression testing machine isa kind of product of electro-machine. It is mainly made puter, Hydraulic pump, hydraulic cylinder override rel ief val ve. Electronic-hydraulic servo valve , compression sensor and soon .In this system, puter acts as main controller, through outer equipment instate the test method, test parameter ect. The procession of work is as follows: At first, puter send testing message testing message to the controller , and then ,the controller control the servo valve to decide pression .At the same time pression sensor get the signal of cylinder pressure. The siginal is transmitted to puter throuth A/D (transform) and be amplified. Secondly, pare the pressure given singal and throuth PID (proportion Integral Differential)revise the control. Signal of the controller .Finally,the system close-loop control is relized ,getting to the demand. Key word: Testing Machine Hydraulic Pump Electronlic-hydraulic Servo pression Sensor PID 目录摘要. . . . . . . . . . . . . . . . . . . . . . . . . . …………. …………. ………. .I A B S T R A C T ……………. ……………………. . ……………. I I 1 前言……….…………………………………………………………….….……………..1 2 总体方案的确定说明........................... ……………………. …………. ………..2 2. 1 动力的选择.. . . . . . . . . . . . . . . . . . . . . . . . . . ……………………. …………. ……….. 2 执行机构的选择........................... ……………………. …………. ………..2 传感器的选择........................... ……………………. …………. ………..3 3 液压系统的设计. . . . . . . . . . . . . . . . . . . . . . . . . . . ……………………. …………. ………. . 4 3. 1 工况分析. . . . . . . . . . . . . . . . . . . . . . . . . . . ……………………. …………. ………. . 4 液压缸主要尺寸的确定........................... ……………………. ………….………..4 液压泵的选择........................... …………………….