scholarly journals Metal Oxide Gas Sensor Drift Compensation Using a Dynamic Classifier Ensemble Based on Fitting

Sensors ◽  
2013 ◽  
Vol 13 (7) ◽  
pp. 9160-9173 ◽  
Author(s):  
Hang Liu ◽  
Zhenan Tang
Keyword(s):  
Metal Oxide ◽  
Gas Sensor ◽  
Classifier Ensemble ◽  
Sensor Drift ◽  
Drift Compensation ◽  
Metal Oxide Gas Sensor

scholarly journals Drift Compensation on Massive Online Electronic-Nose Responses

Chemosensors ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 78
Author(s):  
Jianhua Cao ◽  
Tao Liu ◽  
Jianjun Chen ◽  
Tao Yang ◽  
Xiuxiu Zhu ◽  
...  
Keyword(s):  
Active Learning ◽  
Gas Sensor ◽  
Electronic Nose ◽  
Effective Means ◽  
Learning Paradigm ◽  
Class Label ◽  
Learning Framework ◽  
Sensor Drift ◽  
Drift Compensation ◽  
Noisy Labels

Gas sensor drift is an important issue of electronic nose (E-nose) systems. This study follows this concern under the condition that requires an instant drift compensation with massive online E-nose responses. Recently, an active learning paradigm has been introduced to such condition. However, it does not consider the “noisy label” problem caused by the unreliability of its labeling process in real applications. Thus, we have proposed a class-label appraisal methodology and associated active learning framework to assess and correct the noisy labels. To evaluate the performance of the proposed methodologies, we used the datasets from two E-nose systems. The experimental results show that the proposed methodology helps the E-noses achieve higher accuracy with lower computation than the reference methods do. Finally, we can conclude that the proposed class-label appraisal mechanism is an effective means of enhancing the robustness of active learning-based E-nose drift compensation.

Metal Oxide Gas Sensor Arrays: Geometrical Design and Selectivity

2009 ◽  
Author(s):  
Frank Röck ◽  
Nicolae Barsan ◽  
Udo Weimar ◽  
Matteo Pardo ◽  
Giorgio Sberveglieri
Keyword(s):  
Metal Oxide ◽  
Gas Sensor ◽  
Sensor Arrays ◽  
Geometrical Design ◽  
Metal Oxide Gas Sensor ◽  
Gas Sensor Arrays

Flexible and Autonomous Integrated System for Characterizing Metal Oxide Gas Sensor Response in Dynamic Environment

2014 ◽  
Vol 43 (1) ◽  
pp. 74-88 ◽  
Author(s):  
Kamarulzaman Kamarudin ◽  
Syed Muhammad Mamduh ◽  
Ali Yeon Md Shakaff ◽  
Shaharil Mad Saad ◽  
Ammar Zakaria ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Gas Sensor ◽  
Dynamic Environment ◽  
Sensor Response ◽  
Integrated System ◽  
Metal Oxide Gas Sensor

Nanostructured Metal Oxide Gas Sensor

2014 ◽  
pp. 1213-1253
Author(s):  
Jamal Mazloom ◽  
Farhad E. Ghodsi
Keyword(s):  
Metal Oxide ◽  
Gas Sensor ◽  
Recent Progress ◽  
Theoretical Models ◽  
Response Mechanism ◽  
Conduction Model ◽  
Hollow Nanostructures ◽  
Metal Oxide Gas Sensor ◽  
Semiconducting Metal Oxide ◽  
Nanostructured Metal

This chapter provides a review of recent progress in gas sensor based on semiconducting metal oxide nanostructure. The response mechanism and development of various methods to enhancement of sensing properties receives the most attention. Theoretical models to explain the effects of morphology, additives, heterostructured composite and UV irradiation on response improvement were studied comprehensively. Investigations have indicated that 1D nanostructured metal oxide with unique geometry and physical properties display superior sensitivity to gas species. Also, the proposed conduction model in gas sensor based on 1D Metal oxide is discussed. Finally, the response mechanism of hierarchical and hollow nanostructures as novel sensing materials is addressed.

In-Situ Analysis of Volatile Organic Compounds in Biogas Fermentation Processes Using a Metal Oxide Gas Sensor Array

2020 ◽  
Vol MA2020-01 (28) ◽  
pp. 2153-2153
Author(s):  
Binayak Ojha ◽  
Divyashree Narayana ◽  
Margarita Aleksandrova ◽  
Heinz Kohler ◽  
Matthias Schwotzer ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Metal Oxide ◽  
Gas Sensor ◽  
Organic Compounds ◽  
Sensor Array ◽  
Fermentation Processes ◽  
Gas Sensor Array ◽  
Volatile Organic ◽  
Metal Oxide Gas Sensor

FIXED POINT RH EQUILIBRIUM OF GAS SENSOR TEST CHAMBER USING SIMPLE AIR BUBBLER METHOD

2015 ◽  
Vol 76 (10) ◽  
Author(s):  
Amirul Abd Rashid ◽  
Nor Hayati Saad ◽  
Daniel Bien Chia Sheng ◽  
Lee Wai Yee ◽  
Ahmed Jaffar
Keyword(s):  
Fixed Point ◽  
Water Vapor ◽  
Metal Oxide ◽  
Gas Sensor ◽  
Test Chamber ◽  
Important Variable ◽  
Oxygen Molecule ◽  
Distilled Water ◽  
Nitrogen Gas ◽  
Metal Oxide Gas Sensor

Relative Humidity (RH) is considered as one of the important variable to be controlled during testing and characterizing of metal oxide gas sensor. This is because the metal oxide can easily react with the hydrogen and oxygen molecule of the water vapor which associated with RH level. In this paper, the effect of using nitrogen as carrier to feed the analyte to the sensor inside a 40 liter capacity container has been studied. When Nitrogen gas was supplied to the chamber, the RH value dropped significantly from initial ~67 % RH to ~7 % RH within one hour duration. As an alternative, a simple bubbler system was introduced to minimize the drop of RH. The bubbler which was filled with 100% distilled water or mixed with a certain percentage of glycerol are able to maintain the RH to a certain level for a certain period of time.  

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