【作者】 齐小强；

【导师】 蔡坤宝；

【作者基本信息】 重庆大学 ， 信号与信息处理， 2011， 硕士

【摘要】 随着电子技术的发展,人们对医疗诊断仪器的自动化和智能化要求越来越高。因为全自动化的仪器可以免去大量重复手工操作,避免误操作,提高检测效率;另一方面,医疗诊断仪器的复杂度和精密度也是越来越高。使用传统的单片机等微控制器来直接实现大型医疗诊断仪器的自动化与智能化变得越来越困难,特别是开发高性能的全自动化学发光免疫分析仪那样的医疗仪器。所以,使用嵌入式实时操作系统就显得相当重要。把复杂的多任务管理交给操作系统,简化了程序设计,提高了单片机的实时性能和仪器的可靠性。随着单片机技术的发展,工作频率和存储器有了很大提升,单片机具备了移植操作系统的条件。论文在研究了Freescale的S12XS系列单片机MC9S12XS128和μC/OS-Ⅱ嵌入式实时操作系统的基础上,提出了将μC/OS-Ⅱ操作系统移植到S12XS微控制器。实现对步进电机的机械传动及定位系统的协调控制,应用于化学发光免疫分析仪的添加试剂系统的自动控制。论文从硬件和软件两个方面进行了研究。硬件方面:设计了MC9S12XS128单片机正常工作的完整电路和步进电机驱动芯片THB6128正常工作的完整电路。由于步进电机使用的是24V高电压,为了避免因步进电机方面的短路烧毁单片机,设计了光耦合器隔离电路。软件方面:移植μC/OS-Ⅱ嵌入式实时操作系统到MC9S12XS128单片机;配置了单片机各模块的工作方式;设计了步进电机的调速方案和控制流程;分析了步进电机在添加试剂系统中的工作流程并给出了详细的控制程序。论文以合理的电路设计和软件编程实现了既定目标。实际测试表明基于S12XS微控制器的μC/OS-Ⅱ嵌入式实时操作系统实现了对化学发光免疫分析仪的添加试剂系统的自动控制,且效果良好。论文也为化学发光免疫分析仪的全自动控制奠定了基础。更多还原

【Abstract】 With the development of electronic technology, the automation and intellectualization of diagnostic instrument is highly demanded more and more. On the one hand, because the automatic equipment can spare lots of repeated manipulation, avoid miss operation and improve the detection efficiency; on the other hand, the complexity and precision of medical diagnosis instrument is higher and higher as well. The microcontrollers such as the conventional single-chip are found more and more difficult to be used directly to achieve the automatic and intelligent of large medical diagnosis instruments, especially developing the high-performance medical instruments such as the full-automatic Chemiluminescence Immunoassay Analyzer. Therefore, it is very important to use the embedded real-time operating system. The management of complicated multi-tasks is set to the operating system and consequently, program designs are simplified, the real-time performance of the single-chip and reliability of the instrument are improved. As the single-chip technology advances, the working frequency and memory has been improved greatly so that the single-chip has the capability of operating system Transplantation.On the basis of study of the single-chip MC9S12XS128 that is the series of the S12XS of Freescale, andμC/OS-Ⅱembedded real-time operating system, the program of transplanting theμC/OS-Ⅱoperating system into S12XS microcontroller is put forward in this paper. It has not only realizes the coordinating and controlling of mechanical transmission and positioning system of step motor, but also has been applied in the automatic control of adding reagent system in Chemiluminescence Immunoassay Analyzer.The research is made from two aspects hardware and software. In hardware, it designed a work circuit of MC9S12XS128 and step motor driver chip THB6128. Because Step motor uses 24V high voltage, in order to avoiding step motor’s short-circuit burns the single-chip, photocoupler isolation circuit is designed. In software,μC/OS-Ⅱembedded real-time operating system is transplanted into single-chip MC9S12XS128; the work style of each module in the single-chip is configured; the speed control scheme and control process of the step motor is designed; the workflow of stepping motor in adding reagent systems is analyzed and the detailed control procedures are given.Considering the reasonable circuit design and software programming, this paper realized the fixed goal. The actual test indicates thatμC/OS-Ⅱembedded real-time operating system based on S12XS microcontroller realizes the automatic control of the adding reagent system in Chemiluminescence Immunoassay Analyzer, and the result indicates its good efficiency. The paper also lays a foundation for the automatic control of the Chemiluminescence Immunoassay Analyzer.更多还原