微量药品单元动态称重系统的设计与实现  

Design and realization of micro scale capsule dynamic weighing system

作　　者：庄育锋[1] 翟宇[1] 

机构地区：[1]北京邮电大学自动化学院,北京100876

出　　处：《仪器仪表学报》2013年第2期379-386,共8页Chinese Journal of Scientific Instrument

基　　金：北京邮电大学青年科研创新计划专项课题

摘　　要：提出了一种微量药品单元动态称重系统的设计方法,可依次完成药品单元的传送和分拨,并统计药品单元的质量情况。建立了药品单元动态称重的动力学模型,模型以能量守恒原理为基础,考虑了滑槽截面参数、传感器参数等因素,对不同质量药品单元的运动过程进行了分析,并利用MATLAB对分析结果进行了仿真。系统对药品单元的传送、分拨控制过程是利用称重传感器对药品单元进行测量,通过与传感器相连的模数转换器连接ARM处理器并发送药品单元质量数据,再由ARM处理器以串口通信的方式将数据发送到控制电机旋转的单片机处理器。同时,ARM处理器基于miniGUI的人机交互界面可以实时显示药品单元质量情况。仿真数据和实验结果表明:当传感器产生信号的阈值0.195 V和称重频率为1.46 s时,药品单元的动态称重过程可以成功实现。微量药品单元称重系统设计方法有效地完成了药品单元称重过程,提高了药品单元动态称重的可靠性、有效性。The design method for a micro scale capsule dynamic weighing system is proposed, which can transport and classify capsules in turn and acquire the quality of the capsules. A kind of kinetic model for the dynamic weighing of capsule is established. The model is based on energy conservation principle and considers the influences of sliding chute parameters, sensor parameters and other factors. The movement process of the capsules with different weights is analyzed. MATLAB is adopted to simulate the analysis results. During the process of transporting and classifying the capsules, the weighing transducer is used to measure the weight of the capsule. The A/D converter,which is linked to the weighing transducer, sends the capsule weight data to the subsequent ARM processor. The ARM processor sends data to MCU that controls the movement of the electric motor through serial communication and the observing and controlling process is completed. Meanwhile, a graphic user interface is developed based on miniGUI, with which the ARM processor can display the capsule weight information in real time. The simulation and experiment results indicate that when the threshold of the sensor signal is 0. 195 V and the time interval of the weighing process is 1.46 s, the dynamic capsule weighing process can be realized successfully. The design for capsule weighing unit has completed the process of capsules weighing effectively and improves the reliability and high efficiency of capsule dynamic condition weighing.

关 键 词：微量 药粒称重 动态 能量守恒原理 ARM 单片机 MINIGUI 称重传感器 动力学模型 人机交互界面 

分 类 号：TP212.12[自动化与计算机技术—检测技术与自动化装置] TP271[自动化与计算机技术—控制科学与工程]