發(fā)布時(shí)間：2018-05-23 10:42

  本文選題：嵌入式系統(tǒng) + 醫(yī)療設(shè)備��； 參考：《天津大學(xué)》2012年碩士論文

【摘要】：隨著電子技術(shù)的發(fā)展，人們?nèi)粘Ｉ钪械碾娮赢a(chǎn)品已逐步向?qū)Ｓ没�、小型化發(fā)展。而電子設(shè)備的專用化和小型化，為嵌入式系統(tǒng)井噴式發(fā)展提供了必要的舞臺(tái)。目前，嵌入式系統(tǒng)已經(jīng)成為了最炙手可熱的行業(yè)之一，人們的工作和生活，已經(jīng)一日都離不開嵌入式系統(tǒng)設(shè)備。 醫(yī)療設(shè)備作為嵌入式大家庭中的一員，相對(duì)于其他民用嵌入式設(shè)備更加精密，對(duì)于穩(wěn)定性和可靠性的要求也更加嚴(yán)格。因此，用于醫(yī)療設(shè)備的嵌入式系統(tǒng)，在設(shè)計(jì)之初，就需要更加嚴(yán)謹(jǐn)和周密的原理；在調(diào)試之時(shí)，需要更加嚴(yán)格的測(cè)試。如此才能確保質(zhì)量的可靠和穩(wěn)定。這也是絕大多數(shù)嵌入式醫(yī)療設(shè)備的共同特性。 論文從研究分析當(dāng)前對(duì)專用醫(yī)療設(shè)備的需求著手，結(jié)合嵌入式系統(tǒng)設(shè)備專用性強(qiáng)的特點(diǎn)，針對(duì)穩(wěn)定性可靠性的應(yīng)用，設(shè)計(jì)并實(shí)現(xiàn)了一個(gè)基于Windows CE嵌入式操作系統(tǒng)的醫(yī)療監(jiān)控設(shè)備。 為保證系統(tǒng)的可靠性、穩(wěn)定性和實(shí)時(shí)性，本項(xiàng)目采取的措施如下： 硬件方面，采用了Intel公司的Pxa27x作為嵌入式CPU。該CPU擁有強(qiáng)勁性能的同時(shí)，穩(wěn)定性與可靠性也得到業(yè)內(nèi)的廣泛認(rèn)可，廣泛應(yīng)用于精密儀器和軍工領(lǐng)域。采用了多路RS485作為其數(shù)據(jù)傳送接口，RS485串口采用差分對(duì)電平信號(hào)，相比于RS232串口電平傳輸距離更遠(yuǎn)，，數(shù)據(jù)傳輸更加穩(wěn)定可靠，更能適應(yīng)復(fù)雜的電氣環(huán)境。底層驅(qū)動(dòng)方面，本項(xiàng)目沒有采用普通設(shè)備的串口操作方式，而是采用了DMA方式進(jìn)行數(shù)據(jù)傳送，誤碼率更低，實(shí)時(shí)性更高，傳輸速率抗壓性更強(qiáng)。CPU采用DMA作為數(shù)據(jù)從外部接口到內(nèi)部存儲(chǔ)器之間的傳送通道，在串口與內(nèi)部存儲(chǔ)器之間建立多個(gè)映射，并在存儲(chǔ)器接收滿了之后通過硬件實(shí)時(shí)切換，以確保數(shù)據(jù)在接收之后的處理不消耗過多CPU資源，從而實(shí)現(xiàn)高實(shí)時(shí)性的效果。應(yīng)用軟件方面，為達(dá)到傳輸可靠、顯示及時(shí)的目的，充分與底層串口驅(qū)動(dòng)相配合，將采集到的數(shù)據(jù)迅速而高效地解析，并及時(shí)通過圖形的方式顯示到軟件界面上，以確保用戶能夠直觀、清晰地得到設(shè)備采集到的信息。另外，對(duì)于設(shè)備的串口驅(qū)動(dòng)程序編寫測(cè)試程序進(jìn)行可靠性測(cè)試，以驗(yàn)證該醫(yī)療監(jiān)控設(shè)備的穩(wěn)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.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TP368.1

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