A Review of Gas Measurement Practices and Sensors for Tunnels

Cepa, Jorge Jerez; Pavón, Rubén Muñoz; Caramés, Paloma; Alberti, Marcos García

doi:10.3390/s23031090

Cited by 7 publications

(1 citation statement)

References 131 publications

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“…The two-day database contains 5760 samples for each variable, respectively. Sensing principles are discussed in [12][13][14][15][16][17].…”

Section: Parametric Identification Of the Behaviour Of Pollutants In ...mentioning

confidence: 99%

The Online Identification of the Behaviour of Pollutants inside the Tunnel Tube

Hrbček,

Ždánsky,

Nemec

et al. 2023

Applied Sciences

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A tunnel tube is a relatively small space that allows for the accumulation of gaseous and liquid substances containing harmful substances. Given this fact, a ventilation system is the most critical component of a tunnel’s technological equipment, greatly influencing its reliability and safe operation. The dynamic behaviour of pollutants in the tunnel tube is characterized by a significant stochastic component and changing parameters over time due to pressure, airflow, and atmospheric condition changes. This work addresses the issue of modelling individual parts of the tunnel tube for optimal tunnel ventilation control. It is necessary to create a model of a controlled system that is used for predicting process variables to calculate optimal control action. By using recursive identification methods in conjunction with a predictive controller, the proposed concept can be applied to numerous similar applications.

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“…The two-day database contains 5760 samples for each variable, respectively. Sensing principles are discussed in [12][13][14][15][16][17].…”

Section: Parametric Identification Of the Behaviour Of Pollutants In ...mentioning

confidence: 99%

The Online Identification of the Behaviour of Pollutants inside the Tunnel Tube

Hrbček,

Ždánsky,

Nemec

et al. 2023

Applied Sciences

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Electrochromic performance of Pt-embedded porous alumina thick films via interface engineering with low-temperature volatile organic compound based gas sensors

Nadekar,

Ghuge,

Khollam

et al. 2024

J Mater Sci: Mater Electron

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Optimized PVA-(ZnO)x-(PANI)1−x nanocomposites: characterization and humidity sensing application

Elkatlawy,

Elzwawy,

Sakr

et al. 2024

J Mater Sci: Mater Electron

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This work presents an effort to study the potential of ternary PVA/ZnO/PANI nanocomposite for humidity sensing applications. Easily-peeled-off films of the ternary system were formed by the solution casting method and characterized. FTIR manifested the uniformity of the synthesized films and the existence of both polyaniline and ZnO functional groups in the relevant PVA host matrix. Characteristic absorption bands of PVA were overlapped with some characteristic bands of polyaniline. XRD patterns show the typical semicrystalline peak for the pristine PVA. The XRD analysis did not demonstrate any crystalline peaks for ZnO due to the capping-off effect of the PVA macromolecule. Energy dispersive X-ray mapping analysis and SEM micrographs manifested a homogeneous distribution of ZnO and PANI particles and a smooth yet dense film appearance. A study of electronic transitions and band gap displayed that the value of the band gap varies based on component concentration with the lowest value for the film of equal concentration of both ZnO and polyaniline. The humidity sensing behavior of the films was explored at different frequencies. The most variation in impedance was reached at 500 Hz, while the impedance variation at 50 Hz is the best from the performance point of view, where the relation between the impedance and relative humidity is linear. Samples F3 [PVA (ZnO)0.7(PANI)0.3], and F4 [PVA (ZnO)0.5(PANI)0.5] revealed the highest sensitivity among other tested samples. The measured hysteresis for the F3 and F4 samples were 1.38E + 05 MΩ/RH and 1.55E + 05 MΩ/RH, respectively. Impedance and complex impedance spectroscopy measurements confirmed that the film F3 revealed the highest sensitivity among the other tested samples. The proposed structure of the sensor can be employed for real-life applications since it can be easily coupled with electronic read devices and its overall functionality.

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A Review of Gas Measurement Practices and Sensors for Tunnels

Cited by 7 publications

References 131 publications

The Online Identification of the Behaviour of Pollutants inside the Tunnel Tube

The Online Identification of the Behaviour of Pollutants inside the Tunnel Tube

Electrochromic performance of Pt-embedded porous alumina thick films via interface engineering with low-temperature volatile organic compound based gas sensors

Optimized PVA-(ZnO)x-(PANI)1−x nanocomposites: characterization and humidity sensing application

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