生产线自动称重控制系统设计【参考】.doc

摘 要 自动生产线被应用到工业领域后，称重装置不仅是提供重量数据的简单仪表，而且是工业控制系统和管理系统的一个组成部分。生产线自动称重技术水平的提高，可以推进工业生产的自动化和管理的现代化，缩短作业时间，改善操作条件，降低能源和材料的消耗，提高产品质量以及加强企业管理。 生产线自动称重控制系统设计，以PLC为控制核心，称重传感器采集现场重量信号，称重变送器将传感器的信号隔离放大，转换成0-10V的标准信号，EM235模块将这一标准信号转换为相对应的数值。通过实际重量与变速重量、目标重量相比较，利用PWM脉冲控制舵机阀门旋转角度，从而控制下料流量大小。利用电磁铁控制称重斗下料门开合，通过光电开关防止辅助斗物料溢出，利用报警器实现报警功能。整个控制过程分手动操作和自动操作。通过三维力控软件构建远程监控系统，现场情况可以实时显示，监控系统的控制级别高于现场控制的级别。 关键词：PLC 称重传感器 报警器 光电开关 远程监控 ABSTRACT After automatic production line was applied to industry region, weighing device was not only a technique simplicity instrument to supply weight data，but also a part of industrial control system and supervisory system. The development of the production line of automatic weighing can advance the modernization of the automation and management of industrial production, reduce operating time, improve the operating conditions, reduce the consumption of energy and materials, improve product quality and strengthen enterprise management. The production line of automatic weighing control systems, PLC for the control of the core, weighing sensor to collect the live weight of the signal, the weight of the transmitter to the sensor signal isolation amplifier, and converted into standard signals of 0-10V, the EM235 module to the standard signal is converted to corresponds to the value. By actual weight and variable speed weight, target weight, compared to the size of the PWM pulses to control the rotation angle of the steering gear, which control the flow of cutting. The system use electromagnets to control the weighing bucket cutting door opening and closing, use the photoelectric switch to prevent the auxiliary bucket spillage, use the alarm to achieve alarm function. The entire control process is divided into manual operation and automatic operation. The system use three-dimensional force control software to build the remote monitoring systems .it can display real-time, the monitoring system control level is higher than the level of s