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A Self-Sustained Wireless Multi-Sensor Platform Integrated with Printable Organic Sensors for Indoor Environmental Monitoring

机译：集成了可打印有机传感器的自持式无线多传感器平台用于室内环境监测

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A self-sustained multi-sensor platform for indoor environmental monitoring is proposed in this paper. To reduce the cost and power consumption of the sensing platform, in the developed platform, organic materials of PEDOT:PSS and PEDOT:PSS/EB-PANI are used as the sensing films for humidity and CO2 detection, respectively. Different from traditional gas sensors, these organic sensing films can operate at room temperature without heating processes or infrared transceivers so that the power consumption of the developed humidity and the CO2 sensors can be as low as 10 μW and 5 μW, respectively. To cooperate with these low-power sensors, a Complementary Metal-Oxide-Semiconductor (CMOS) system-on-chip (SoC) is designed to amplify and to read out multiple sensor signals with low power consumption. The developed SoC includes an analog-front-end interface circuit (AFE), an analog-to-digital convertor (ADC), a digital controller and a power management unit (PMU). Scheduled by the digital controller, the sensing circuits are power gated with a small duty-cycle to reduce the average power consumption to 3.2 μW. The designed PMU converts the power scavenged from a dye sensitized solar cell (DSSC) module into required supply voltages for SoC circuits operation under typical indoor illuminance conditions. To our knowledge, this is the first multiple environmental parameters (Temperature/CO2/Humidity) sensing platform that demonstrates a true self-powering functionality for long-term operations.
机译：提出了一种用于室内环境监测的自持多传感器平台。为了降低传感平台的成本和功耗，在开发的平台中，将PEDOT：PSS和PEDOT：PSS / EB-PANI的有机材料分别用作湿度和CO2检测的传感膜。与传统的气体传感器不同，这些有机传感膜可在室温下运行，而无需加热过程或红外收发器，因此，所产生的湿度和CO2传感器的功耗分别可低至10μW和5μW。为了与这些低功耗传感器配合使用，互补金属氧化物半导体（CMOS）片上系统（SoC）被设计为以低功耗放大和读取多个传感器信号。开发的SoC包括一个模拟前端接口电路（AFE），一个模数转换器（ADC），一个数字控制器和一个电源管理单元（PMU）。由数字控制器调度的传感电路以较小的占空比进行功率门控，以将平均功耗降至3.2μW。设计的PMU将从染料敏化太阳能电池（DSSC）模块清除的功率转换为在典型的室内照度条件下SoC电路运行所需的电源电压。据我们所知，这是第一个多个环境参数（温度/ CO2 /湿度）感测平台，展示了长期运行中真正的自供电功能。

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