【摘要】：在現(xiàn)代社會中,更多的人對心電監(jiān)護(hù)設(shè)備的需求越來越強(qiáng)烈。一些患有輕微心臟疾病或者是剛經(jīng)歷疾病處于恢復(fù)期的病人,需要在日常生活中隨時監(jiān)護(hù)自身心臟的情況；也有一些心臟病患者會有突發(fā)疾病的可能,需要長時問的觀察以捕捉某些特殊信息；還有一些活動不是很方便的病人,不能時常去醫(yī)院就診�；谏鲜龅那闆r,設(shè)計一種便攜式心電監(jiān)護(hù)設(shè)備實時檢測人體心臟狀態(tài)并進(jìn)行數(shù)據(jù)分析,對于心臟疾病的及早發(fā)現(xiàn)以及治療具有重要意義。 本文介紹了一種基于國際12導(dǎo)聯(lián)標(biāo)準(zhǔn)的多通道便攜式心電監(jiān)護(hù)設(shè)備,該設(shè)備分別由模擬板和數(shù)字板組成。 模擬板的電路主要由輸入緩沖電路、前置放大電路、50Hz陷波電路、高通濾波電路、低通濾波電路、主放大電路、電平抬升電路、基于MSP430單片機(jī)的A/D轉(zhuǎn)換電路以及通道巡檢電路組成。主要作用為對采集到的心電信號進(jìn)行放大、濾波的同時,抑制夾雜在心電信號中的共模干擾信號,并最終將調(diào)理后的心電信號傳送給MSP430集成的A/D轉(zhuǎn)換器進(jìn)行模數(shù)轉(zhuǎn)換。在MSP430外圍電路方面,使用外部+3.3V電源為ADC12供電,使用頻率為32768Hz的低頻晶振作為定時器Timer_A的輔助時鐘,從而控制ADC12的采樣頻率。在A/D轉(zhuǎn)換軟件方面,將ADC12配置成序列通道單次轉(zhuǎn)換模式,采樣頻率控制在500Hz。最終利用串口以波特率11520bps的速度將數(shù)據(jù)傳送給ARM。 數(shù)字板的電路主要由ARM(S3C2440)處理器及相關(guān)的外圍電路、無線發(fā)射模塊電路、無線接收模塊電路組成。其中無線發(fā)射模塊的主控MCU為ARM處理器,而無線接收模塊的MCU為AT90S8515單片機(jī)。ARM處理器主要完成心電數(shù)據(jù)的數(shù)字處理,而外圍電路中的FLASH、SD卡作為數(shù)據(jù)的存儲器,TFT觸屏作為顯示設(shè)備起到人機(jī)交互的作用。在ARM處理器與PC終端的通信中,本系統(tǒng)使用的無線傳輸電路取代了傳統(tǒng)的RS232串口或者USB口方式,使心電設(shè)備的使用不受短距離的約束。在無線發(fā)射模塊以及接收模塊中,分別由ARM和AT90S8515單片機(jī)控制發(fā)送／接收芯片nRF905完成心電數(shù)據(jù)的無線通信。在接收模塊中AT90S8515將接收到的數(shù)據(jù)以USB口的方式傳遞給PC終端,由PC完成最終的數(shù)據(jù)分析處理。
[Abstract]:In modern society, more and more people demand ECG monitoring equipment more and more. Some patients who have mild heart disease or have just experienced a disease in recovery need to monitor their heart condition at any time in their daily lives. There are also patients with heart disease who have the possibility of sudden disease. Long-asked observations are required to capture specific information; there are also patients who are not very convenient to visit the hospital. Based on the above situation, the design of a portable ECG monitoring device for real-time detection of human heart state and data analysis is of great significance for early detection and treatment of heart disease. A multi-channel portable ECG monitoring device based on international 12-lead standard is introduced in this paper. The equipment is composed of analog board and digital board respectively. The analog circuit is mainly composed of input buffer circuit, preamplifier circuit and 50Hz notch circuit, high pass filter circuit, low pass filter circuit, main amplifier circuit, level lifting circuit, The A / D conversion circuit based on MSP430 single chip microcomputer and the circuit of channel inspection are composed. The main function is to amplify and filter the collected ECG signal, suppress the common-mode interference signal mixed in the ECG signal, and finally transmit the adjusted ECG signal to the MSP430 integrated A / D converter for analog-to-digital conversion. In the peripheral circuit of MSP430, the external 3.3V power supply is used to supply the ADC12, and the low-frequency crystal oscillator with the frequency of 32768Hz is used as the auxiliary clock of the timer Timer_A to control the sampling frequency of ADC12. In the aspect of A / D conversion software, the ADC12 is configured into the sequence channel single conversion mode, and the sampling frequency is controlled at 500 Hz. Finally, the serial port is used to transmit the data to ARM at the speed of baud rate 11520bps. The circuit of digital board is mainly composed of ARM (S3C2440) processor and related peripheral circuits, wireless transmitting module circuit and wireless receiving module circuit. The main control MCU of wireless transmitting module is ARM processor, and the MCU of wireless receiving module is AT90S8515 single chip microcomputer. Arm processor mainly completes the digital processing of ECG data. Flash SD card in peripheral circuit acts as the memory of data and TFT touch screen as display device plays the role of man-machine interaction. In the communication between ARM processor and PC terminal, the wireless transmission circuit used in this system replaces the traditional RS232 serial port or USB port mode, so that the use of ECG equipment is not restricted by short distance. In the wireless transmitting module and receiving module, ARM and AT90S8515 MCU control the sending / receiving chip nRF905 to complete the wireless communication of ECG data. In the receiving module, AT90S8515 transfers the received data to the PC terminal as a USB port, and the PC completes the final data analysis and processing.
【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：R318.6;TP274.2

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