【摘要】：嵌入式系統(tǒng)是為特定應(yīng)用而設(shè)計的專用計算機系統(tǒng),其以應(yīng)用為中心、以計算機技術(shù)為基礎(chǔ),軟件硬件可裁剪,對功能、功耗、體積、成本及穩(wěn)定性有嚴格要求。我們生活在滿是嵌入式的世界里,從手表、手機、電話、電飯鍋到船舶、汽車、軍事裝備、航空航天,嵌入式無所不在。本文設(shè)計了基于嵌入式技術(shù)的調(diào)頻廣播中繼系統(tǒng)和ECG監(jiān)護系統(tǒng)。隨著調(diào)頻廣播技術(shù)和接收技術(shù)的發(fā)展,調(diào)頻廣播的覆蓋范圍也在不斷地擴大,但是對于山區(qū)、涵洞等特殊地形,調(diào)頻廣播存在弱信號區(qū)和盲區(qū)。為解決隧道內(nèi)無法接收無線廣播信號的問題,本文提出了一種傳輸基帶數(shù)字音頻信號的調(diào)頻廣播中繼系統(tǒng)的設(shè)計方案。本方案在控制端利用專用FM解調(diào)芯片Si473x將需要轉(zhuǎn)播的FM頻道信號接收下來轉(zhuǎn)換成基帶數(shù)字音頻信號,再將多路數(shù)字音頻信號復(fù)用后通過光纖傳輸?shù)剿淼纼?nèi)部,隧道內(nèi)的終端恢復(fù)出數(shù)字音頻信號并進行FM調(diào)制后輸出。本方案的優(yōu)勢是占用光纖帶寬小,轉(zhuǎn)播方式靈活;不僅可以轉(zhuǎn)換廣播信號的調(diào)制頻道,而且支持插播來自控制臺的音頻內(nèi)容以及RDS信息。心電圖對于監(jiān)控心臟活動狀態(tài)具有重要作用,而市面上已有的便攜式心電監(jiān)護儀體積大、功耗高,不能長時間持續(xù)運行。本文設(shè)計了由移動Android設(shè)備和心電數(shù)據(jù)采集模塊組成的心電實時監(jiān)護系統(tǒng),兩者之間通過低功耗的藍牙BLE協(xié)議實現(xiàn)數(shù)據(jù)通信。系統(tǒng)中的數(shù)據(jù)處理功能在Android移動設(shè)備上實現(xiàn),因而數(shù)據(jù)采集模塊具有結(jié)構(gòu)簡單、體積小、功耗低的特點。該系統(tǒng)可實現(xiàn)長時間連續(xù)監(jiān)測人體心電信號的功能,具有廣闊的應(yīng)用前景。
[Abstract]:Embedded system is a special computer system designed for specific applications. It is application-centered and based on computer technology. The software and hardware can be clipped. It has strict requirements for function, power consumption, volume, cost and stability. We live in an embedded world, from watches, cell phones, telephones, electric cookers to ships, cars, military equipment, aerospace, embedded everywhere. This paper designs the FM broadcast relay system and ECG monitoring system based on embedded technology. With the development of FM broadcasting technology and receiving technology, the coverage of FM broadcasting is also expanding. However, for special terrain such as mountain areas, culverts and other special terrain, FM broadcasting has weak signal area and blind area. In order to solve the problem that the radio broadcast signal can not be received in the tunnel, a design scheme of FM broadcasting relay system for transmitting baseband digital audio signal is proposed in this paper. In the control end, the special FM demodulation chip Si473x is used to convert the FM channel signal needed to be relayed into baseband digital audio signal, and then multiplexing the multi-channel digital audio signal to the tunnel through optical fiber. The terminal in the tunnel recovers the digital audio signal and outputs after FM modulation. The advantages of this scheme are that it takes up less fiber bandwidth, and the broadcast mode is flexible, and it can not only convert the modulation channel of broadcast signal, but also support the audio content from the console and RDS information. Electrocardiogram (ECG) plays an important role in monitoring the state of cardiac activity. However, the existing portable ECG monitor in the market is large in size, high in power consumption, and can not be continuously operated for a long time. In this paper, a real-time ECG monitoring system composed of mobile Android device and ECG data acquisition module is designed. The data communication between them is realized by low-power Bluetooth BLE protocol. The data processing function of the system is realized on the Android mobile device, so the data acquisition module has the characteristics of simple structure, small volume and low power consumption. The system can realize the function of continuously monitoring human ECG for a long time, and has a broad application prospect.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TP368.1;TN93;TP274

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本文編號：2345262