集成多种控制算法的通用称重配料仪设计

发布时间：2018-05-08 15:22

  本文选题：嵌入式系统 + 称重配料　； 参考：《南京大学》2012年硕士论文

【摘要】：嵌入式称重技术是国家经济和科学技术竞争的重要领域,称重技术随着电子技术和传感器的进步得到了迅速的发展。其中,精确的称重配料仪表是配料系统最重要的组成部分,因此研究与设计基于嵌入式技术的称重配料系统有十分重要的意义。本课题研究可应用于料斗式落料、螺旋泵和蝶阀方式供料的称重配料系统和针对持续流量控制的系统。为称重配料和流量控制提供了有效的解决方案。 本文广泛收集、深入分析了称重配料系统的技术资料,首先对目前存在的配料系统进行了深入的调查,结合国内外配料系统技术的发展现状,总结了其优缺点；其次从系统的准确性、可靠性和功能实现等方面进行了研究。在此基础上,结合系统具体的功能需求以及目前衡器领域的新技术,设计了以ARM7微处理器为核心的称重配料仪。 硬件方面着重分析了其基本原理和基本构成,同时选择称重传感器,设计A/D转换电路、放大电路、通信模块和显示模块等,完成称重系统的硬件设计。本设计为不同的用户需求提供了RS232、RS485和USB等丰富的通信接口。为确保精度,对采集的信号进行了低通滤波处理。 软件方面着重分析了μC/OS-Ⅱ嵌入式操作系统的移植。在此操作系统平台上,为各个模块编写了驱动程序,并为系统编写了应用程序。并在软件方面采用了平均值法进行数字滤波。 在控制输出方面,针对料斗式落料、螺旋泵和蝶阀方式供料的系统采用模糊控制方式,针对持续流量控制采用PID算法,有效地提高了称重精度。
[Abstract]:Embedded weighing technology is an important field of national economy and science and technology competition. With the progress of electronic technology and sensors, weighing technology has been developed rapidly. Among them, accurate weighing and batching instrument is the most important part of the batching system, so it is very important to research and design the weighing and batching system based on embedded technology. This research can be applied to the weighing and batching system of hopper, screw pump and butterfly valve and the system of continuous flow control. It provides an effective solution for weighing batching and flow control. In this paper, the technical data of weighing and batching system are collected and analyzed. Firstly, the existing batching system is investigated deeply, and its advantages and disadvantages are summarized in combination with the development status of domestic and foreign batching system technology. Secondly, the accuracy, reliability and function realization of the system are studied. On this basis, combined with the specific functional requirements of the system and the new technology in the field of weighing apparatus, a weighing and batching instrument with ARM7 microprocessor as the core is designed. In the aspect of hardware, the basic principle and structure of the system are analyzed. At the same time, the weighing sensor is selected, and the A- / D conversion circuit, amplifier circuit, communication module and display module are designed to complete the hardware design of the weighing system. This design provides rich communication interfaces such as RS232 RS485 and USB for different users. In order to ensure the accuracy, the collected signal is processed by low pass filter. In the aspect of software, the transplant of 渭 C / OS-鈪，

本文编号：1861931