针对传统心电监护装置电路结构复杂、体积大、携带不便等问题,设计一种高度集成的便携式无线心电监护系统。系统采用模拟前端SOC(System On Chip)芯片ADS1298作为心电信号(ECG:Electro Cardio Gram)测量的核心芯片,结合高速、低功耗的...针对传统心电监护装置电路结构复杂、体积大、携带不便等问题,设计一种高度集成的便携式无线心电监护系统。系统采用模拟前端SOC(System On Chip)芯片ADS1298作为心电信号(ECG:Electro Cardio Gram)测量的核心芯片,结合高速、低功耗的单片机STC12LE5A60S2以及无线传输模块,再将ECG数据传输给上位机,由Lab VIEW软件编写的程序完成ECG信号处理。测试结果表明,该系统具有电路结构简单、体积小,抗干扰能力强、便携式、高精度等优点,有利于对心血管疾病的院前发现、防治和远程诊治,同时降低了心源性猝死的发生率。展开更多
We propose and demonstrate a simplified and tunable frequency interval optical frequency comb(OFC) generator based on a dual-drive Mach-Zehnder modulator(DD-MZM) using a single continuous-wave(CW) laser and low-power ...We propose and demonstrate a simplified and tunable frequency interval optical frequency comb(OFC) generator based on a dual-drive Mach-Zehnder modulator(DD-MZM) using a single continuous-wave(CW) laser and low-power radio frequency(RF) driven signal. A mathematical model for the scheme is established. The 21-and 29-mode OFCs with frequency interval ranging from 6 GHz to 40 GHz are obtained under DD-MZM driven by a low-power RF signal within a maximum bandwidth of 1.12 THz. The generated OFCs exhibit spectral flatnesses of less than 0.5 d B and 0.8 d B within bandwidths of 160 GHz and 400 GHz, respectively.展开更多
基金supported by the National Natural Science Foundation of China(No.61571251)the Public Technical Application Research Project of Zhejiang(No.2015C34004)+2 种基金the Discipline Open Fund Project of Zhejiang(No.xkxl1534)the National Education Research of Information Technology(No.146232081)the K.C.Wong Magna Fund in Ningbo University
文摘We propose and demonstrate a simplified and tunable frequency interval optical frequency comb(OFC) generator based on a dual-drive Mach-Zehnder modulator(DD-MZM) using a single continuous-wave(CW) laser and low-power radio frequency(RF) driven signal. A mathematical model for the scheme is established. The 21-and 29-mode OFCs with frequency interval ranging from 6 GHz to 40 GHz are obtained under DD-MZM driven by a low-power RF signal within a maximum bandwidth of 1.12 THz. The generated OFCs exhibit spectral flatnesses of less than 0.5 d B and 0.8 d B within bandwidths of 160 GHz and 400 GHz, respectively.