IEEE Trans Biomed Circuits Syst. 2018 Aug;12(4):751-761. doi: 10.1109/TBCAS.2018.2823275. Epub 2018 May 7.
This paper presents a real-time electrocardiogram (ECG) monitoring system for wearable devices. The system is based on the proposed parallel delta modulator architecture with local maximum point and local minimum point algorithms to detect QRS and PT waves. Therefore, using the proposed system and algorithm, real-time PR and RT intervals, and ST segment measurements can be achieved in long-term wearable ECG recording. The algorithm is tested with the MIT-BIH Arrhythmia Database for QRS complex detection and with the QT Database for the P and T wave detections. The simulation result shows that the algorithm achieves above 99%, 91%, and 98% accuracy in the QRS complex, P wave, and T wave detections, respectively. Experimental results are presented from the system prototype, in which the parallel delta modulator circuits are fabricated in IBM 0.13 $\mu \text{m}$ standard CMOS technology and the algorithms are implemented in a Xilinx Spartan-6 field programmable gate array (FPGA). The parallel delta modulators consume 720 nW at 1 kHz sampling rate with $\pm$0.6 V power supply. The proposed system has the potential to be applied in future long-term wearable ECG recording devices.
本文提出了一种用于可穿戴设备的实时心电图 (ECG) 监测系统。该系统基于所提出的并行增量调制架构，采用局部极大值点和局部极小值点算法来检测 QRS 和 PT 波。因此，使用所提出的系统和算法，可以在长期可穿戴 ECG 记录中实现实时 PR 和 RT 间隔以及 ST 段测量。该算法已在 MIT-BIH 心律失常数据库中用于 QRS 复合波检测，在 QT 数据库中用于 P 波和 T 波检测进行了测试。仿真结果表明，该算法在 QRS 复合波、P 波和 T 波检测中的准确率分别达到了 99%、91%和 98%。本文还介绍了系统原型的实验结果，其中并行增量调制电路采用 IBM 0.13 $\mu$m 标准 CMOS 工艺制造，算法在 Xilinx Spartan-6 现场可编程门阵列 (FPGA) 中实现。并行增量调制器在 1 kHz 采样率下工作时消耗 720 nW，电源为 $\pm$0.6 V。该系统具有应用于未来长期可穿戴 ECG 记录设备的潜力。
