本课题是以卷烟厂制丝线电子皮带秤动态计量测控系统为研究对象，介绍了国内外电子皮带秤的发展情况及其在烟草行业的应用状况及最新动态，分析了电子皮带秤的称重原理，阐述了误差的来源及减少误差的方法。运用软件工程的设计方法，设计了一种基于西门子S7-300 PLC为控制主机的高精度电子皮带秤动态测量控制系统。 根据国内外可编程序控制器的发展现状和相关的工艺特点，提出了新型电子皮带秤的设计思想及总体要求，分析了动态测量控制系统的功能特性，选择了适合于烟草行业的皮带秤秤架系统。硬件方面，在分析了系统的测控对象的基础上以西门子S7-300 PLC为控制核心，采用双托辊双传感器无支点秤台，SEW高速旋转编码器用于皮带测速，机械无级自动纠偏系统，日本进口人机界面，并选用德国SEW公司电机减速机组，德国威图标准工业控制柜，进口三菱变频器等硬件，择优选配了控制主机及系统硬件。 软件及功能扩展性方面，在S7-300编译环境SIMATIC STEP7 V5.4下，进行了PLC软件的设计与调试，实现了硬件的配置和整个系统的所有控制功能；实现了触摸屏监控软件的设计；通过对SIMATIC的硬件组态完成系统硬件的配置。结合国内外电子皮带秤的应用实际，将当今先进成熟的变频调速技术、脉冲测速技术、触摸屏技术与PLC融为一体。 在完成系统设计要求的基础上，针对温度等非目标参量对计量精度的影响作了进一步研究，将温度和电压波动作为非目标参量,采用RBF神经网络的方法对压力传感器进行非线性校正补偿的模拟实验,以提高数据检测的稳定性。仿真结果理想，有应用价值。 通过对设计的“电子皮带秤测控系统”的电气安装及现场调试，表明该系统运行稳定，实现了预期的全部功能；现场的实际应用表明，它对提高生产效率、保证产品质量具有积极的意义，取得了较好的结果。从而使电子皮带秤具有较好的测量、控制性能和较高的工程实用价值，同时也降低了工程费用，提高了系统的性价比。

The measurement and control system of electronic belt scale for the tobacco factory applications is prudently studied which is based on the sufficient understanding of the domestic and abroad development of electronic belt balance as well as the advanced applications utilized in the field of tobacco industry. The weighting principle of electronic belt scale is deeply analyzed, especially the error detection and reduction methods. A high-precision dynamic measuring control system of electronic belt scale, SIEMENS S7-300 PLC as control center, is systematically designed. The design methods and general requirements of the novel electronic belt scale are developed accorded with the technological characteristics of the programmable logic controller applied internationally and domestically. The features of dynamic measuring control system are analyzed, and then the structure of belt scale system is chosen which is regarded as suitable for the tobacco industry. As to the hardware, the SIEMENS S7-300 PLC was concerned as the controlling core, dual-sensor pairs of roller weighing no fulcrum weighting system as balance platform, SEW high-speed rotary encoder for belt velocity measurement, the mechanical step less automatic correction system for data correction, state-of-art HMI from Japan as control interface the motor reducer unit of SEW company and RITTAL standard industrial control cabinets, Germany, and Mitsubishi inverters, merit-based matching of host computer and system hardware all for the control system. On the aspects of system in software, the PLC software is designed and debugged in the compiling environment of S7-300, SIMATIC STEP7 V5.4 and all the functions, the monitoring software of HMI and hardware configurations of the system are realized with the configuration of SIMATIC in hardware. With the study of practical domestic and abroad applications in electronic belt scale, the cutting edge technologies of frequency conversion velocity modulation, pulse measurement, touch-screen as HMI and PLC are organically and efficiently integrated as a whole. On the shoulder of implementation of system designing requirements, furthermore, the effect of non-target parameters such as the temperature for measurement accuracy are studied, the temperature and voltage fluctuations are taken as a non-target parameter which is on the behalf of enhancing the stability of data detection. The simulation experiments are successfully fulfilled and c with pressure sensors of non-linear compensation for improving the stability of data measurement by using RBF neural network method, which is also considered as valuable for control industry. The operation of the system is proved to be stable and successful by the electrical installation and debug of the design of "electronic belt scale monitoring and control system" on the spot. All of the functions are realized with no accident. The control system with PLC is proved to be positive for the insurance of product quality and efficiency by real application. Hence, and higher practical value, but the excellent advantages like reduction of the project cost, improvement the cost-effective and high value for industrial options are all attributed to the significant control performance of the electronic belt scale system. .