血型分析系统自动加样关键技术研究

发布时间：2018-02-22 23:44

  本文关键词： 自动加样系统 加样机械臂 S3C2440A μC/OS-Ⅱ 协同仿真　出处：《重庆大学》2012年硕士论文　论文类型：学位论文

【摘要】：随着医疗技术的发展，医疗机构需要处理的血型实验样本量的增加，使得实验人员的工作量也随之增加。传统的手工和半自动血型实验方法不仅操作繁琐，效率较低，精密度较差，而且也较容易出现人为差错，无法满足医疗机构检验需求，实现血型实验的自动化越来越受到重视。自动加样系统是基于生物阻抗法的全自动血型分析系统的重要组成部分，也是整个自动化实验平台的关键部件之一，研究和开发具有高精度定位、高精度抽放样功能的自动加样系统具有十分重要的意义。 针对自动化血型实验平台的高精度定位、高精度抽放样和高安全性加样需求，本文在对进口全自动血型分析仪器自动加样系统性能分析的基础上，研究和制定了全自动血型实验平台的自动加样系统加样方案，根据设计方案，，最终完成了自动加样系统机械结构设计、运动控制设计和嵌入式控制系统设计。通过对自动加样系统关键机构的有限元分析，验证和优化了设计方案。最后，通过加样机构臂的运动和控制协同仿真，对其设计方案进行了验证和优化，并为控制参数的设计和优化提供了很好的参考。 本论文主要的研究内容涉及如下方面：①通过调研和分析，根据加样系统的功能要求，制定了自动加样系统的总体设计方案，详细分析了自动加样系统的组成原理及其工作流程，并给出了自动加样系统的性能指标。②完成了包括加样机械臂、样本试剂转盘和微量液体抽放样机构的自动加样系统的机械结构设计，应用UG NX7.5建立了加样系统的三维实体模型。针对加样机械臂的悬臂结构特点，对其进行了有限元分析，验证了设计方案。③根据自动加样系统机械运动部分相似定位控制需求，详细设计了运动控制方案，完成了基于运动控制芯片LM629N和驱动芯片L298的直流电机PID位置伺服控制系统的软、硬件设计。④针对自动加样控制系统时序复杂、实时性要求高的特点，通过两种控制方案的比较，从系统的可靠性和稳定性，还有系统升级维护和扩展考虑，选择了最优控制系统方案，完成了基于S3C2440A和μC/OS-Ⅱ的嵌入式控制系统设计，包括μC/OS-Ⅱ系统在S3C2440A上的移植和任务程序设计及中断处理设计，给出了部分系统移植程序代码、函数原型和任务程序流程图。⑤为了提高加样机械臂性能，使用ADAMS和MATLAB/Simulink对其进行了运动和控制协同仿真，仿真结果达到了理想的控制要求，为控制参数的设计和优化及控制程序的编写提供了很好的参考。
[Abstract]:With the development of medical technology, the amount of blood type experimental samples that need to be handled by medical institutions increases, which makes the workload of laboratory personnel increase. Traditional manual and semi-automatic blood group test methods are not only cumbersome, but also inefficient. Poor precision, and also more prone to human error, unable to meet the needs of medical institutions for testing, Automatic sampling system is an important part of automatic blood type analysis system based on biological impedance method, and it is also one of the key parts of the whole automated experiment platform. It is of great significance to study and develop the automatic sampling system with high precision positioning and high precision drawing function. In order to meet the requirements of high precision positioning, high precision sampling and high safety sampling of automatic blood type test platform, this paper analyzes the performance of automatic sampling system of imported automatic blood group analysis instrument. The automatic sample feeding system of automatic blood type experiment platform was studied and formulated. According to the design scheme, the mechanical structure design of automatic sample feeding system was finally completed. Motion control design and embedded control system design. Through the finite element analysis of the key mechanism of the automatic sampling system, the design scheme is verified and optimized. The design scheme is verified and optimized, which provides a good reference for the design and optimization of control parameters. The main research contents of this paper are as follows: 1. Through investigation and analysis, according to the functional requirements of the sampling system, the overall design scheme of the automatic sampling system is formulated. The principle and working flow of the automatic sampling system are analyzed in detail, and the performance index .2 of the automatic sampling system is given. The mechanical structure design of automatic sampling system of sample reagent turntable and micro liquid pumping mechanism is designed. The three-dimensional solid model of sample feeding system is established by UG NX7.5. According to the characteristics of cantilever structure, finite element analysis is carried out. According to the requirement of the mechanical movement part similar positioning control of the automatic sampling system, the motion control scheme is designed in detail. The software of DC motor PID position servo control system based on motion control chip LM629N and drive chip L298 is completed. Considering the reliability and stability of the system, as well as the maintenance and expansion of the system upgrade, the optimal control system scheme is selected, and the embedded control system design based on S3C2440A and 渭 C / OS- 鈪

本文编号：1525608