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CO2 and O2 Detection by Electric Field Sensors.
Sensors ( IF 3.9 ) Pub Date : 2020-01-25 , DOI: 10.3390/s20030668
Marco Santonico 1 , Alessandro Zompanti 2 , Anna Sabatini 2 , Luca Vollero 3 , Simone Grasso 1 , Carlo Di Mezza 2 , Giorgio Pennazza 2
Affiliation  

In this work an array of chemical sensors for gas detection has been developed, starting with a commercial sensor platform developed by Microchip (GestIC), which is normally used to detect, trace, and classify hand movements in space. The system is based on electric field changes, and in this work, it has been used as mechanism revealing the adsorption of chemical species CO2 and O2. The system is composed of five electrodes, and their responses were obtained by interfacing the sensors with an acquisition board based on an ATMEGA 328 microprocessor (Atmel MEGA AVR microcontroller). A dedicated measurement chamber was designed and prototyped in acrylonitrile butadiene styrene (ABS) using an Ultimaker3 3D printer. The measurement cell size is 120 × 85 mm. Anthocyanins (red rose) were used as a sensing material in order to functionalize the sensor surface. The sensor was calibrated using different concentrations of oxygen and carbon dioxide, ranging from 5% to 25%, mixed with water vapor in the range from 50% to 90%. The sensor exhibits good repeatability for CO2 concentrations. To better understand the sensor response characteristics, sensitivity and resolution were calculated from the response curves at different working points. The sensitivity is in the order of magnitude of tens to hundreds of µV/% for CO2, and of µV/% in the case of O2. The resolution is in the range of 10-1%-10-3% for CO2, and it is around 10-1% for O2. The system could be specialized for different fields, for environmental, medical, and food applications.

中文翻译:

通过电场传感器检测CO2和O2。

在这项工作中,从Microchip(GestIC)开发的商用传感器平台开始,开发了用于气体检测的一系列化学传感器,该平台通常用于检测,追踪和分类空间中的手部运动。该系统基于电场变化,在这项工作中,它已被用作揭示化学物质CO2和O2吸附的机理。该系统由五个电极组成,其响应是通过将传感器与基于ATMEGA 328微处理器(Atmel MEGA AVR微控制器)的采集板接口而获得的。使用Ultimaker3 3D打印机在丙烯腈丁二烯苯乙烯(ABS)中设计了专用的测量室并制作了原型。测量单元尺寸为120×85 mm。花青素(红玫瑰)被用作传感材料,以使传感器表面功能化。使用浓度范围为5%至25%的氧气和二氧化碳与50%至90%的水蒸气混合,对传感器进行校准。该传感器对二氧化碳浓度显示出良好的可重复性。为了更好地理解传感器的响应特性,根据不同工作点的响应曲线计算出灵敏度和分辨率。对于CO2,灵敏度约为数十至数百µV /%,对于O2,灵敏度约为µV /%。二氧化碳的分辨率在10-1%-10-3%的范围内,氧气的分辨率在10-1%左右。该系统可以专门用于不同领域,适用于环境,医疗和食品应用。使用浓度范围为5%至25%的氧气和二氧化碳与50%至90%的水蒸气混合,对传感器进行校准。该传感器对二氧化碳浓度显示出良好的可重复性。为了更好地理解传感器的响应特性,根据不同工作点的响应曲线计算出灵敏度和分辨率。对于CO2,灵敏度约为数十至数百µV /%,对于O2,灵敏度约为µV /%。二氧化碳的分辨率在10-1%-10-3%的范围内,氧气的分辨率在10-1%左右。该系统可以专门用于不同领域,适用于环境,医疗和食品应用。使用浓度范围为5%至25%的氧气和二氧化碳与50%至90%的水蒸气混合,对传感器进行校准。该传感器对二氧化碳浓度显示出良好的可重复性。为了更好地理解传感器的响应特性,根据不同工作点的响应曲线计算出灵敏度和分辨率。对于CO2,灵敏度约为数十至数百µV /%,对于O2,灵敏度约为µV /%。二氧化碳的分辨率在10-1%-10-3%的范围内,氧气的分辨率在10-1%左右。该系统可以专门用于不同领域,适用于环境,医疗和食品应用。为了更好地理解传感器的响应特性,根据不同工作点的响应曲线计算出灵敏度和分辨率。对于CO2,灵敏度约为数十至数百µV /%,对于O2,灵敏度约为µV /%。二氧化碳的分辨率在10-1%-10-3%的范围内,氧气的分辨率在10-1%左右。该系统可以专门用于不同领域,适用于环境,医疗和食品应用。为了更好地理解传感器的响应特性,根据不同工作点的响应曲线计算出灵敏度和分辨率。对于CO2,灵敏度约为数十至数百µV /%,对于O2,灵敏度约为µV /%。二氧化碳的分辨率在10-1%-10-3%的范围内,氧气的分辨率在10-1%左右。该系统可以专门用于不同领域,适用于环境,医疗和食品应用。
更新日期:2020-01-26
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