一種新型心電信號無線檢測方法關鍵技術的研究
[Abstract]:In recent years, cardiovascular disease has become the greatest threat to human life and health. The onset of these diseases is often unpredictable and easily fatal. Therefore, ECG monitoring as the main means of diagnosis of cardiovascular disease has attracted more and more attention. A portable ECG monitor, which can collect ECG signals for a long time, accurately and in real time, is very important for the early treatment of cardiovascular diseases and the reduction of morbidity and mortality. ECG signal detection is one of the key points in the development of portable ECG monitor. This paper aims at the problems of the traditional ECG monitor, such as the short monitoring time, the irritation of the electrode to the human skin, the restriction of the human body activity by the electrode wire, based on the non-contact ECG measurement, electronic skin and wireless signal transmission technology. A radio detection method for ECG signals is proposed. In this method, the non-contact integrated electrode and the sensor circuit are combined with the electronic skin technology, and a kind of thin membrane is developed, which is similar to the skin and attached to the skin of the human body. The sensor circuit then wirelessly transmits the detected ECG signal through the coupling coil to the read circuit. Finally, the reading circuit detects the received ECG signal by phase detection. In this paper, the proposed ECG radio detection method is studied in detail. Firstly, the passive wireless sensor circuit uses two identical varactor diodes in series to suppress the common mode signal and amplify the differential mode signal. Secondly, the inductance coil parameters and their coupling performance in the sensor circuit and the reading circuit are studied by using the Ansoft HFSS electromagnetic field platform. The planar inductance coil model is built. Through simulation analysis, the influence of inductance coil parameters on inductance performance and optimization criteria are obtained, and the sensor coil parameters are determined. The mutual inductance model of planar inductance is built, and the effects of geometric parameters of reading coil, vertical distance between coils, center offset and angle offset on the coupling performance between the sensor coil and the reading coil are obtained by simulation analysis. The parameters of the reading coil and the working range of the sensor coil and the reading coil are determined. Finally, through simulation analysis, the reading circuit uses phase detection to detect ECG signal, and completes the design of each module in the circuit.
【學位授予單位】:重慶大學
【學位級別】:碩士
【學位授予年份】:2016
【分類號】:TH789
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