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基于PLC冗余技术的全自动称量包装精度控制
孟志刚,李晓丽,刘丽芳
开封大学,河南 开封 475004
摘要:
目的 由于全自动称量包装精度控制容易受到物料冲力等因素的影响,导致精度控制很难保持稳定,降低其抗扰性能。为此,提出基于PLC冗余技术的全自动称量包装精度控制方法。方法 建立称量传感器的数学模型,采用滑动平均滤波和程序判断滤波处理称量原始信号,去除动态振荡和干扰因素,将处理的信号作为输入数据,利用PLC冗余技术制定同步机制,实现数据传输和控制命令的同步传输,在此基础上,使用设计的专家控制器,根据灵活的控制规则库实现全自动称量包装的精度控制。结果 设计的基于PLC冗余技术的全自动称量包装精度控制方法过码质量计量偏差小、通讯数据协同性好。结论 通过滤波处理的控制方法可以有效提高控制系统的抗扰性能。
关键词:  PLC冗余技术  全自动称量  包装  精度控制
DOI:10.19554/j.cnki.1001-3563.2021.19.038
分类号:TB486
基金项目:
Automatic Weighing and Packaging Accuracy Control Based on PLC Redundancy Technology
MENG Zhi-gang, LI Xiao-li, LIU Li-fang
(Kaifeng University, Kaifeng 475004, China)
Abstract:
Because the accuracy control of fully automatic weighing and packaging is easily affected by the impact of materials and other factors, it is difficult to keep the accuracy control stable and reduce its anti-interference performance. Therefore, the control method of fully automatic weighing and packaging accuracy based on PLC redundancy technology is proposed. Establish the mathematical model of the load cell, use the moving average filter and program judgment filter to process the weighing original signal, remove the dynamic oscillation and interference factors, use the processed signal as the input data, use the PLC redundancy technology to develop a synchronization mechanism to realize the synchronous transmission of data transmission and control commands. On this basis, the designed expert controller is used to realize the precision control of fully automatic weighing and packaging according to a flexible control rule library. The designed fully automatic weighing and packaging accuracy control method based on PLC redundancy technology has small cross-code weight measurement deviation and good communication data coordination. The anti-interference performance of the control system can be effectively improved by the control method of filter processing.
Key words:  PLC redundancy technology  fully automatic weighing  package  precision control

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