Reducing Electric Power Consumption When Transmitting ECG/EMG/EEG Using a Bluetooth Low Energy Microcontroller†
Reducing Electric Power Consumption When Transmitting ECG/EMG/EEG Using a Bluetooth Low Energy Microcontroller†
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使用蓝牙低功耗微控制器传输 ECG/EMG/EEG 时减少电力消耗†
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
E. Clancy
中科院分区：
文献类型：
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作者：
J. Li;M. Bhuiyan;X. Huang;B. McDonald;T. Farrell;E. Clancy
低功率可穿戴传感器现在具有足够高的采样率和带宽以支持电生理信号（例如，ECG/EMG/EEG）[1-3]。但是，这些更高的采样率与更高的功耗相关联，大大缩短了电池寿命[4，5]。因此，我们研究了商业蓝牙低功耗微控制器的平均功耗（TI CC 2640 R2 BLE模块），同时改变发射功率（最大与最小可用），传输之间的时间间隔（10 ms至5 s），采样频率（1000至4000 Hz）和传输有效载荷大小（所有样本与每个间隔的一个“处理”值）;因为这些变量中的每一个都会影响功耗[6，7]。无论是采样率还是有效载荷大小都没有明显改变功耗。正如预期的那样，增加发射功率会增加功耗。较长的传输间隔降低了功耗，其中大部分优点发生在50-100 ms的间隔内。因此，这些商业模块支持相对低的延迟（≤ 100 ms）、低功率信号采集，而无需特别考虑有效载荷大小或采样率。
Low-power wearable sensors now have sufficiently high sampling rates and bandwidth to support acquisition of electrophysiologic signals (e.g., ECG/EMG/EEG) [1–3]. But, these higher sampling rates are associated with higher power consumption, greatly reducing battery life [4, 5]. Thus, we examined average power consumption in a commercial Bluetooth low energy microcontroller (TI CC2640R2 BLE Module) while varying transmission power (maximum vs. minimum available), time interval between transmissions (10 ms to 5 s), sampling frequency (1000 to 4000 Hz), and transmit payload size (all samples vs. one “processed” value per interval); since each of these variants can influence power consumption [6, 7]. Neither sampling rate nor payload size noticeably altered power consumption. Increased transmit power, as expected, increased power consumption. Longer transmit intervals reduced power consumption, with most of this advantage occurring by intervals as small as 50–100 ms. Thus, relatively low latency (≤ 100 ms), low power signal acquisition is supported by these commercial modules, without particular regard to payload size or sampling rate.