Das P Sarati, Gagnon-Turcotte G, Ouazaa K, Bouzid K, Hosseini S Nazila, Bharucha E, Tremblay D, Moineau S, Messaddeq Y, Corbeil J, Gosselin B
Annu Int Conf IEEE Eng Med Biol Soc. 2020 Jul;2020:4101-4104. doi: 10.1109/EMBC44109.2020.9176335.
This paper presents the EcoChip 2, an autonomous multimodal bio-environmental sensor platform for the monitoring of microorganisms in the northern habitat. The EcoChip 2 prototype includes an array of 96-wells for the continuous monitoring of microbiological growth through a multichannel electrochemical impedance analyzer circuit. In addition, the platform includes luminosity, humidity, temperature sensors and monitoring. The developed electronic board uses an ultra-low-power microcontroller unit, a custom power management unit, a low-power wireless ISM-2.45 GHz transceiver, and a flash memory to accumulate and store the sensor data over extended monitoring periods. When a wireless base station is placed within the transmission range of the EcoChip 2, an embedded low-power wireless transceiver transmits the 96-wells impedance data and the other sensor data stored in the flash memory to the user interface. We present the measured performance of the prototype, along with laboratory test results of bacterial growth measurements inside the 96 wells in parallel. We show that the EcoChip 2 can successfully measure the impedances associated with bacterial growth over several hours using an excitation frequency of 2 kHz with power consumption of 114.6 mW under operating mode.
本文介绍了EcoChip 2，这是一个用于监测北方栖息地微生物的自主多模态生物环境传感器平台。EcoChip 2原型包括一个96孔阵列，用于通过多通道电化学阻抗分析仪电路连续监测微生物生长。此外，该平台还包括光度、湿度、温度传感器及监测功能。所开发的电子板采用超低功耗微控制器单元、定制电源管理单元、低功耗无线ISM - 2.45 GHz收发器以及闪存，以便在延长的监测期内累积和存储传感器数据。当无线基站位于EcoChip 2的传输范围内时，嵌入式低功耗无线收发器将96孔的阻抗数据以及存储在闪存中的其他传感器数据传输到用户界面。我们展示了该原型的实测性能，以及96孔内细菌生长测量的实验室测试结果。我们表明，EcoChip 2在工作模式下使用2 kHz的激励频率，功耗为114.6 mW时，能够在数小时内成功测量与细菌生长相关的阻抗。
