Wearable electro-optical sensor for monitoring of nitrogen dioxide gas in environment

IF 4.1 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Sensors and Actuators A-physical Pub Date : 2024-09-05 DOI:10.1016/j.sna.2024.115870

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引用次数: 0

Abstract

Environmental monitoring for detection of harmful pollutants is a challenge in today’s world. Development of wearable sensors with cost-effectiveness and practicality, while using accessible electronic components can be a solution to this challenge. In the present work ultraviolet light emitting diodes (UV-LEDs) and a Light Dependent Resistor (LDR) pair with carefully designed programmable circuitry is used to detect Nitrogen Dioxide (NO₂) in the environment. The sensor is battery operated and rechargeable, making it convenient and eco-friendly. The sensor developed is miniaturized and wearable in nature for the detection of analyte gas in the environment. The sensor is stable and inexpensive as compared to the existing NO₂ sensors available, which are electro-chemical, or oxide based. The sensor system is sensitive and selective to its exposure to NO₂ gas and has no interference with typical environmental attributes such as humidity and temperature, which is a common challenge in gas detection technologies. The principle of gas detection is absorption based, light falling on the detector absorbed by the test gas present in the environment, thus changing the detector resistance. Absorption-based gas detection is indigenously simple but highly effective technique. This method not only ensures good sensitivity but enhances the selectivity of the electro-optical sensor towards the test gas preventing false triggering in the presence of other interfering gases.

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用于监测环境中二氧化氮气体的可穿戴光电传感器

检测有害污染物的环境监测是当今世界面临的一项挑战。开发具有成本效益和实用性的可穿戴传感器，同时使用可获得的电子元件，可以解决这一难题。在本研究中，紫外线发光二极管（UV-LED）和光敏电阻（LDR）与精心设计的可编程电路配对用于检测环境中的二氧化氮（NO2）。该传感器由电池驱动并可充电，既方便又环保。所开发的传感器具有微型化和可穿戴的特点，可用于检测环境中的分析气体。与现有的基于电化学或氧化物的二氧化氮传感器相比，该传感器性能稳定，价格低廉。该传感器系统对接触到的二氧化氮气体具有灵敏度和选择性，不会受到湿度和温度等典型环境属性的干扰，而这正是气体检测技术面临的共同挑战。气体检测的原理是基于吸收，落在检测器上的光被环境中的检测气体吸收，从而改变检测器的电阻。基于吸收的气体检测是一种简单而高效的本土技术。这种方法不仅能确保良好的灵敏度，还能提高光电传感器对检测气体的选择性，防止在存在其他干扰气体时发生错误触发。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Sensors and Actuators A-physical 工程技术-工程：电子与电气

CiteScore

8.10

自引率

6.50%

发文量

630

审稿时长

49 days

期刊介绍： Sensors and Actuators A: Physical brings together multidisciplinary interests in one journal entirely devoted to disseminating information on all aspects of research and development of solid-state devices for transducing physical signals. Sensors and Actuators A: Physical regularly publishes original papers, letters to the Editors and from time to time invited review articles within the following device areas: • Fundamentals and Physics, such as: classification of effects, physical effects, measurement theory, modelling of sensors, measurement standards, measurement errors, units and constants, time and frequency measurement. Modeling papers should bring new modeling techniques to the field and be supported by experimental results. • Materials and their Processing, such as: piezoelectric materials, polymers, metal oxides, III-V and II-VI semiconductors, thick and thin films, optical glass fibres, amorphous, polycrystalline and monocrystalline silicon. • Optoelectronic sensors, such as: photovoltaic diodes, photoconductors, photodiodes, phototransistors, positron-sensitive photodetectors, optoisolators, photodiode arrays, charge-coupled devices, light-emitting diodes, injection lasers and liquid-crystal displays. • Mechanical sensors, such as: metallic, thin-film and semiconductor strain gauges, diffused silicon pressure sensors, silicon accelerometers, solid-state displacement transducers, piezo junction devices, piezoelectric field-effect transducers (PiFETs), tunnel-diode strain sensors, surface acoustic wave devices, silicon micromechanical switches, solid-state flow meters and electronic flow controllers. Etc...