【作者】 刘威；

【导师】 李伟；

【作者基本信息】 中国矿业大学 ， 机械工程（专业学位）， 2023， 硕士

【摘要】 散装中药饮片自动称量系统是自动化中药房中药饮片自动调剂系统的重要组成部分,饮片的称量精度和称量速度分别影响中药处方的调剂质量和调剂效率。因此,自动称量系统的过程控制,在饮片调剂的过程中极为关键。国内一些企业研制的散装中药饮片自动调剂系统因为称量精度和稳定性无法保证,一直没有得到推广。目前,中药房处方调剂的自动化程度依然较低,主要依赖于传统“手抓捏称”的配药方式,效率低、精度差,无法满足当前社会需求。因此,本文以散装中药饮片作为称量对象,结合现有智能控制方法,设计一套嵌入式自动称量系统,实现散装中药饮片精确、快速称量十分必要。首先,针对自动称量系统存在的问题,以及中药饮片特性和中医处方调剂需求,采用三级给料的控制方式,设计散装中药饮片自动称量系统总体方案,包括自动称量控制方案、硬件选型、硬件电路设计和实验台搭建。其次,基于机械振动学、动力学原理和MATLAB系统辨识工具箱重点研究了振动给料环节的数学模型,同时分析了称量环节的数学模型,以及饮片特性与给药速度之间的关系,从而完成了散装中药饮片自动称量系统模型的搭建。然后,针对称量对象的随机性和称量过程的非线性、时变性与大惯性等特点,采用模糊PD型迭代学习控制方法设计自动称量控算法,保证系统称量结果的准确性和称量过程的快速性与稳定性,并基于MATLAB仿真工具和自动称量系统模型对控制算法进行仿真,验证模糊PD型迭代学习算法的可行性,为散装中药饮片自动称量系统的设计与实现提供理论依据。最后,采用EPC-287为控制核心,基于模糊PD型迭代学习的自动称量控制算法,对自动称量控制系统软件进行设计,包括程序设计和界面设计,完成自动称量控制系统的实现,并对散装中药饮片自动称量系统进行功能验证。实验结果表明,基于模糊PD型迭代学习控制算法的自动称量系统可以实现散装中药饮片的精确、快速称量,满足自动化中药房中药饮片调剂系统对中药处方的调剂需求。本论文有图65幅,表14个,参考文献93篇。更多还原

【Abstract】 The automatic weighing system of bulk Chinese herbal medicine is an important part of the automatic dispensing system of Chinese herbal medicine in the automatic Chinese pharmacy.The weighing accuracy and speed of Chinese herbal medicine affect the dispensing quality and efficiency of Chinese herbal medicine prescriptions respectively.Therefore,the process control of the automatic weighing system is extremely critical in the dispensing process of the Chinese herbal medicine.The automatic dispensing system for bulk Chinese herbal medicine by some domestic enterprises has not been promoted because the weighing accuracy and stability cannot be guaranteed.At present,the automation of prescription dispensing in the traditional Chinese medicine room is still relatively low,mainly relying on the traditional "hand grasping and weighing" dispensing method,which is low in efficiency and poor in accuracy,and cannot meet the current social needs.Therefore,it is necessary to design a set of embedded automatic weighing system based on the existing intelligent control technology to realize the accurate and rapid weighing of bulk Chinese herbal medicine.First of all,in view of the problems existing in the automatic weighing system,as well as the characteristics of traditional Chinese herbal medicine and the dispensing requirements of traditional Chinese medicine prescriptions,the overall scheme of the automatic weighing system for bulk traditional Chinese herbal medicine is designed using the three-level feeding control mode,including the automatic weighing control scheme,hardware selection,hardware circuit design and experimental platform construction.Secondly,based on mechanical vibration,dynamics principle and MATLAB system identification toolbox,the mathematical model of the vibration feeding link is mainly studied,and the mathematical model of the weighing link is analyzed,as well as the relationship between the characteristics of the Chinese herbal medicine and the drug delivery speed,so as to complete the establishment of the automatic weighing system model of the bulk Chinese herbal medicine.Then,in view of the randomness of the weighing object and the nonlinear,timevarying and large inertia characteristics of the weighing process,the fuzzy PD type iterative learning control method is adopted to design the automatic weighing control algorithm to ensure the accuracy of the weighing results of the system and the rapidity and stability of the weighing process,and the control algorithm is simulated based on the MATLAB simulation tool and the automatic weighing system model to verify the feasibility of the fuzzy PD type iterative learning algorithm,this provides a theoretical basis for the design and implementation of the automatic weighing system of bulk Chinese herbal medicine.Finally,using EPC-287 as the control core and the automatic weighing control algorithm based on fuzzy PD-type iterative learning,the software of the automatic weighing control system is designed,including program design and interface design,to complete the implementation of the automatic weighing control system,and to verify the function of the automatic weighing system of bulk Chinese herbal medicine.The experimental results show that the automatic weighing system based on the fuzzy PD type iterative learning control algorithm can realize the accurate and rapid weighing of bulk Chinese herbal medicine,and meet the dispensing requirements of the automatic Chinese traditional medicine dispensing system for Chinese traditional medicine prescriptions.This thesis has 65 figures,14 tables and 93 references.更多还原