New Optical Gas Sensor for Gas Concentration Measurement Using Digital Image Processing

Lakkis, Sari; Younès, Rafic; Ghandour, Mazen; Alayli, Yasser

doi:10.1016/j.snb.2014.09.103

Cited by 5 publications

(2 citation statements)

References 23 publications

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“…Another challenging issue is the identification of sensors' positions within the captured image and the evaluation of their colours, given that sensor surfaces may not be completely flat and that the interaction between sensing material and surrounding gas may not be uniform across the whole surface. This has been solved by some researchers through manual selection of an area within the image from which a colour measurement is obtained [19]. Both issues are solved in the herein presented system by allowing the controller to manage illumination and to automatically process captured images.…”

Section: Introductionmentioning

confidence: 99%

Colorimetric detection of hazardous gases using a remotely operated capturing and processing system

et al. 2015

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ElsevierMontes Robles, R.; Moragues Pons, ME.; Vivancos Bono, JL.; Ibáñez Civera, FJ.; Martínez Mañez, R.; Fraile Muñoz, R.; García Breijo, E. (2015). Colorimetric detection of hazardous gases using a remotely operated capturing and processing system. ISA Transactions. 59:434-442. doi:10.1016Transactions. 59:434-442. doi:10. /j.isatra.2015 AbstractThis paper presents an electronic system for the automatic detection of hazardous gases. The proposed system implements colorimetric sensing algorithms, thus providing a low-cost solution to the problem of gas sensing. It is remotely operated and it performs the tasks of image capturing and processing, hence obtaining colour measurements in RGB (Red-Green-Blue) space that are subsequently sent to a remote operator via the internet. A prototype of the system has been built to test its performance. Specifically, experiments have been carried out aimed at the detection of CO, CO 2 , NO, NO 2 , SO 2 and formaldehyde at diverse concentrations by using a chromogenic array composed by 13 active and 2 inert compounds. Statistical analyses of the results reveal a good performance of the electronic system and the feasibility of remote hazardous gas detection using colorimetric sensor arrays.

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Section: Introductionmentioning

confidence: 99%

Colorimetric detection of hazardous gases using a remotely operated capturing and processing system

et al. 2015

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“…Figure 3 shows a schematic of the working principle of various sensors, accordingly, based on the output signal of the transducers, gas sensors are classified into-(a) Capacitive,(b) Piezo-electric [quartz crystal microbalance (QCM)], 1,2 (c) Chem-Field Effect Transistor (FET) based, 3,4 (d) Surface acoustic wave (SAW), [5][6][7][8][9][10][11][12] (e) Electrochemical, [13][14][15][16] (f) Optical, [17][18][19] and (g) Chemiresistive. [20][21][22][23][24][25][26] In short, a capacitive gas sensor measures the variation in the dielectric constant of the sensing layer situated between the electrodes, with respect to the exposed target gas concentration.…”

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confidence: 99%

Review—Recent Material Advances and Their Mechanistic Approaches for Room Temperature Chemiresistive Gas Sensors

Reddy

Borse

2021

J. Electrochem. Soc.

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Gas sensors have become an integral part of the industrial and domestic sector, due to the increased emissions from industries, automobiles, and thereby exposure of the harmful gases like CO, NO2, SO2, CO2, NH3 etc. Metal oxide-semiconducting (MOS) chemiresistive gas sensors are the most popular commercial gas sensors available in the market. However, they need high operational temperature for activation and deactivation, which is a serious concern for sensitive combustible environments, as well as in other applications where flexibility, low power consumption, and miniaturization are desirable. Hence, gas sensors those exhibit high sensitivity and selectivity to the target gases, at room temperature are the need-of-hour in the market. This review focuses on various strategies and approaches those being employed and the challenges ahead to realize such room temperature chemiresistive gas sensing; viz: (i) 1D-nanostructuring of various conventional metals and metal oxides; (ii) Nano +heterojunctions between metal oxide-metal oxides and noble metals; (iii) 2D-materials; (iv) Self-heating in nanowires; (v) Perovskites; (vi) Conducting polymers; (vii) defect engineering to produce free charge carriers, and (viii) alternative activation by light illumination. The mechanism behind the strategies implemented to achieve such room temperature gas sensing has been explicitly discussed. The review also introduces various types of gas sensors, their working principle, pros and cons, mechanism and parameters of chemiresistive gas sensors, and their typical construction. This article also discusses the electrode configurations used in the chemiresistive gas sensors.

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Electric field improved the sensitivity of CO on substitutionally doped antimonene

Zhang

2018

Applied Surface Science

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New Optical Gas Sensor for Gas Concentration Measurement Using Digital Image Processing

Cited by 5 publications

References 23 publications

Colorimetric detection of hazardous gases using a remotely operated capturing and processing system

Colorimetric detection of hazardous gases using a remotely operated capturing and processing system

Review—Recent Material Advances and Their Mechanistic Approaches for Room Temperature Chemiresistive Gas Sensors

Electric field improved the sensitivity of CO on substitutionally doped antimonene

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