嵌入式医疗监控设备的设计实现

发布时间：2018-05-23 10:42

本文选题：嵌入式系统 + 医疗设备　；参考：《天津大学》2012年硕士论文

【摘要】：随着电子技术的发展，人们日常生活中的电子产品已逐步向专用化、小型化发展。而电子设备的专用化和小型化，为嵌入式系统井喷式发展提供了必要的舞台。目前，嵌入式系统已经成为了最炙手可热的行业之一，人们的工作和生活，已经一日都离不开嵌入式系统设备。医疗设备作为嵌入式大家庭中的一员，相对于其他民用嵌入式设备更加精密，对于稳定性和可靠性的要求也更加严格。因此，用于医疗设备的嵌入式系统，在设计之初，就需要更加严谨和周密的原理；在调试之时，需要更加严格的测试。如此才能确保质量的可靠和稳定。这也是绝大多数嵌入式医疗设备的共同特性。论文从研究分析当前对专用医疗设备的需求着手，结合嵌入式系统设备专用性强的特点，针对稳定性可靠性的应用，设计并实现了一个基于Windows CE嵌入式操作系统的医疗监控设备。为保证系统的可靠性、稳定性和实时性，本项目采取的措施如下：硬件方面，采用了Intel公司的Pxa27x作为嵌入式CPU。该CPU拥有强劲性能的同时，稳定性与可靠性也得到业内的广泛认可，广泛应用于精密仪器和军工领域。采用了多路RS485作为其数据传送接口，RS485串口采用差分对电平信号，相比于RS232串口电平传输距离更远，，数据传输更加稳定可靠，更能适应复杂的电气环境。底层驱动方面，本项目没有采用普通设备的串口操作方式，而是采用了DMA方式进行数据传送，误码率更低，实时性更高，传输速率抗压性更强。CPU采用DMA作为数据从外部接口到内部存储器之间的传送通道，在串口与内部存储器之间建立多个映射，并在存储器接收满了之后通过硬件实时切换，以确保数据在接收之后的处理不消耗过多CPU资源，从而实现高实时性的效果。应用软件方面，为达到传输可靠、显示及时的目的，充分与底层串口驱动相配合，将采集到的数据迅速而高效地解析，并及时通过图形的方式显示到软件界面上，以确保用户能够直观、清晰地得到设备采集到的信息。另外，对于设备的串口驱动程序编写测试程序进行可靠性测试，以验证该医疗监控设备的稳定性。
[Abstract]:With the development of electronic technology, the electronic products in people's daily life have gradually developed to specialization and miniaturization. The specialization and miniaturization of electronic equipment provide the necessary stage for the development of embedded system blowout. At present, embedded system has become one of the hottest industries. As a member of embedded family, medical equipment is more precise than other embedded devices, and the requirements of stability and reliability are more strict. Therefore, embedded systems for medical devices need more rigorous and thorough principles at the beginning of design, and more rigorous testing is needed when debugging. Only in this way can we ensure the reliability and stability of quality. This is also a common feature of most embedded medical devices. Based on the research and analysis of the current demand for special medical equipment, combined with the strong characteristics of embedded system equipment, the paper aims at the application of stability and reliability. A medical monitoring device based on Windows CE embedded operating system is designed and implemented. In order to ensure the reliability, stability and real-time of the system, the measures taken in this project are as follows: In the aspect of hardware, Pxa27x of Intel Company is used as embedded CPU. At the same time, the stability and reliability of the CPU are widely recognized in the industry, widely used in precision instruments and military industry. The multi-channel RS485 is used as the data transfer interface and RS485 serial port adopts differential pair level signal, which is more stable and reliable than the RS232 serial port, and can adapt to the complex electrical environment. The bottom driver, this project does not adopt the common equipment serial port operation mode, but has adopted the DMA way to carry on the data transmission, the error rate is lower, the real time is higher, DMA is used as the data transfer channel from external interface to internal memory, and several maps are established between serial port and internal memory, and when the memory is fully received, it is switched by hardware in real time. In order to ensure that the data after receiving processing does not consume too much CPU resources, so as to achieve a high real-time effect. In the aspect of application software, in order to achieve the purpose of reliable transmission and timely display, the data collected can be parsed quickly and efficiently, and displayed to the software interface in a graphic way. To ensure that users can intuitively and clearly get the information collected by the device. In addition, the device's serial driver is written to test the reliability of the device to verify the stability of the medical monitoring device.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TP368.1

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