Discrete-to-Integrated (D2In) Research Group, Department of Electronics and Biomedical Engineering, Faculty of Physics, University of Barcelona (UB), 1 Martí i Franquès St., 08028 Barcelona, Spain.
Sensors (Basel). 2021 Apr 10;21(8):2665. doi: 10.3390/s21082665.
A novel self-powered point-of-care low-power electronics approach for galvanic cell-based sample concentration measurement is presented. The electronic system harvests and senses at the same time from the single cell. The system implements a solution that is suitable in those scenarios where extreme low power is generated from the fuel cell. The proposed approach implements a capacitive-based method to perform a non-linear sweep voltammetry to the cell, but without the need to implement a potentiostat amplifier for that purpose. It provides a digital-user readable result without the need for external non-self-powered devices or instruments compared with other solutions. The system conception was validated for a particular case. The scenario consisted of the measurement of a NaCl solution as the electrolyte, which was related to the conductivity of the sample. The electronic reader continuously measured the current with a transfer function gain of 1.012 V mA. The overall system exhibited a maximum coefficient of variation of 6.1%, which was an improvement compared with the state-of-the-art. The proof of concept of this electronics system was validated with a maximum power consumption of 5.8 μW using commercial-off-the-self parts.
提出了一种新颖的自供电即时护理低功耗电子方法，用于基于原电池的样品浓缩测量。电子系统同时从单个电池中采集和检测。该系统实现了一种适用于从燃料电池产生极微弱功率的情况下的解决方案。所提出的方法实现了一种基于电容的方法，对电池进行非线性扫频伏安法，但无需为此目的实现电位计放大器。与其他解决方案相比，它提供了无需外部非自供电设备或仪器即可进行数字用户可读结果的方法。该系统概念已针对特定情况进行了验证。该场景包括测量 NaCl 溶液作为电解质，这与样品的电导率有关。电子读取器使用 1.012 V mA 的传递函数增益连续测量电流。整个系统的最大变化系数为 6.1%，与现有技术相比有所提高。使用市售现货部件，通过最大 5.8 μW 的功耗验证了该电子系统的概念验证。
