基于PLC的传感测速应用设计  

Application Design of Sensor Speed Measurement based on PLC

作　　者：程民利[1] 

机构地区：[1]西安铁路职业技术学院,陕西西安710014

出　　处：《西安铁路职业技术学院学报》2015年第2期1-4,共4页Journal of Xi’an Railway Vocational & Technical Institute

基　　金：基金项目：陕西省教育厅2013年科学研究计划（自然科学专项）项目（2013JK0964）.

摘　　要：结合专业教学需求，基于现有PLC型号设计一传感测速系统；分析了三种测速方法，设计出测速系统的组成图，设计了硬件检测和显示电路，依据测速方法编写了对应于三种不同测速方法的梯形图程序；针对不同的测速程序，定性的分析了测速误差产生的原因，并提出了针对性的改善措施；该系统采用软硬件结合实现测速，故可通过设置程序中的参数，改变测速精度。Combined with teaching needs, a sensor measurement system is designed based on current PLC models. It analyzes three measurement methods and designs composition diagram of the velocimetry system, the hardware detection and display circuit. Three ladder diagram programs are written based on different measuring methods. Ac- cording to different speed programs, it gives a qualitative analysis of the causes of measurement errors, and it puts forward some improvement measures. The system achieves speed measuring with software and hardware combined, the speed measuring precision can be changed through setting up parameters in the program.

关 键 词：测速方法 传感器 定时器 计数器 梯形图程序 

分 类 号：TP212.9[自动化与计算机技术—检测技术与自动化装置]