scholarly journals Development Of Portable Electronic Nose Device For Perfume Odour Classification

2012 ◽  
Author(s):  
Fauzan Khairi Che Harun ◽  
Nur Atiqah Ibrahim ◽  
Mohd Ariffanan Mohd Basri
Keyword(s):  
Metal Oxide ◽  
Gas Sensor ◽  
Electronic Nose ◽  
Current Source ◽  
Metal Oxide Semiconductor ◽  
Oxide Semiconductor ◽  
Constant Current ◽  
Constant Current Source ◽  
Body Shop ◽  
National Instrument

Artikel ini membentangkan pembangunan sebuah hidung elektronik (e–Hidung) mudah alih berdasarkan kad perolehan data National Instrument dan LabView. Kajian ini merangkumi rekabentuk litar e–Hidung yang terdiri daripada pelbagai jenis semikonduktor oksida logam daripada FIGARO sebagai sensor gas. Rintangan dari setiap sensor gas diukur melalui litar arus tetap yang dikawal melalui LabView. Sumber arus tetap digunakan sebagai antara muka elektronik bolehubah yang membolehkan pemetaan voltan keluaran sensor untuk profil rintangan sensor dilakukan secara tepat. Rintangan dari setiap sensor dikira secara tepat dan dipaparkan oleh LabView. Keputusan kajian menunjukkan bahawa e – Hidung yang dihasilkan boleh mengesan dan mengklasifikasikan antara dua jenama terkenal iaitu Body Shop dan Avon. Kaedah analisis komponen utama (PCA) yang digunakan menunjukkan diskriminasi besar iaitu 99.53% untuk bau tersebut. Ini menunjukkan bahawa sistem yang dihasilkan mampu membezakan baud an akan digunakan untuk tugas yang lebih kompleks pada masa akan datang. Kata kunci: Hidung elektronik; semikonduktor oksida logam; sensor gas; pengecaman corak; This paper presents the development of a portable electronic nose (e–Nose) based on a National Instrument data acquisition card and LabView. The study includes the design of e–Nose circuits that consist of different types of metal oxide semiconductor from FIGARO as gas sensors. The resistances of each gas sensor are measured through a constant current circuit controlled via LabView. The constant current source is used as an adaptive electronic interface that allows the accurate mapping of the sensor’s voltage output to sensor resistance profiles. The resistance of each sensor is accurately computed and displayed by LabView. The result of the study showed that the created e – Nose can detect and classify between two famous brands Body Shop and Avon. The applied principal component analysis (PCA) method shows great discrimination of 99.53% for the mentioned odour. This suggests that the system is able to discriminate between simple odours and will be use for a more complex task in the future. Key words: Electronic Nose: metal oxide semiconductor; gas sensor; pattern recognition; PCA

scholarly journals Field Study of Metal Oxide Semiconductor Gas Sensors in Temperature Cycled Operation for Selective VOC Monitoring in Indoor Air

Atmosphere ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 647
Author(s):  
Tobias Baur ◽  
Johannes Amann ◽  
Caroline Schultealbert ◽  
Andreas Schütze
Keyword(s):  
Air Quality ◽  
Metal Oxide ◽  
Gas Sensor ◽  
Gas Sensors ◽  
Indoor Air ◽  
Ambient Air ◽  
Quantitative Agreement ◽  
Metal Oxide Semiconductor ◽  
Oxide Semiconductor ◽  
High Temporal Resolution

More and more metal oxide semiconductor (MOS) gas sensors with digital interfaces are entering the market for indoor air quality (IAQ) monitoring. These sensors are intended to measure volatile organic compounds (VOCs) in indoor air, an important air quality factor. However, their standard operating mode often does not make full use of their true capabilities. More sophisticated operation modes, extensive calibration and advanced data evaluation can significantly improve VOC measurements and, furthermore, achieve selective measurements of single gases or at least types of VOCs. This study provides an overview of the potential and limits of MOS gas sensors for IAQ monitoring using temperature cycled operation (TCO), calibration with randomized exposure and data-based models trained with advanced machine learning. After lab calibration, a commercial digital gas sensor with four different gas-sensitive layers was tested in the field over several weeks. In addition to monitoring normal ambient air, release tests were performed with compounds that were included in the lab calibration, but also with additional VOCs. The tests were accompanied by different analytical systems (GC-MS with Tenax sampling, mobile GC-PID and GC-RCP). The results show quantitative agreement between analytical systems and the MOS gas sensor system. The study shows that MOS sensors are highly suitable for determining the overall VOC concentrations with high temporal resolution and, with some restrictions, also for selective measurements of individual components.

Influence of Epi-Layer Growth Pits on SiC Device Characteristics

2015 ◽  
Vol 821-823 ◽  
pp. 177-180 ◽  
Author(s):  
Chiaki Kudou ◽  
Hirokuni Asamizu ◽  
Kentaro Tamura ◽  
Johji Nishio ◽  
Keiko Masumoto ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Schottky Barrier ◽  
Leakage Current ◽  
Dielectric Breakdown ◽  
Layer Growth ◽  
Metal Oxide Semiconductor ◽  
Oxide Semiconductor ◽  
Constant Current ◽  
Schottky Barrier Diodes ◽  
Current Time

Homoepitaxial layers with different growth pit density were grown on 4H-SiC Si-face substrates by changing C/Si ratio, and the influence of the growth pit density on Schottky barrier diodes and metal-oxide-semiconductor capacitors were investigated. Even though there were many growth pits on the epi-layer, growth pit density did not affect the leakage current of Schottky barrier diodes and lifetime of constant current time dependent dielectric breakdown. By analyzing the growth pit shape, the aspect ratio of the growth pit was considered to be the key factor to the leakage current of the Schottky barrier diodes and the lifetime of metal-oxide-semiconductor capacitors.

scholarly journals A Prototype to Detect the Alcohol Content of Beers Based on an Electronic Nose

Sensors ◽  
2019 ◽  
Vol 19 (11) ◽  
pp. 2646 ◽  
Author(s):  
Henike Guilherme Jordan Voss ◽  
José Jair Alves Mendes Júnior ◽  
Murilo Eduardo Farinelli ◽  
Sergio Luiz Stevan
Keyword(s):  
Metal Oxide ◽  
Electronic Nose ◽  
Gas Sensors ◽  
Metal Oxide Semiconductor ◽  
Oxide Semiconductor ◽  
Alcohol Content ◽  
Electronic Noses

Due to the emergence of new microbreweries in the Brazilian market, there is a need to construct equipment to quickly and accurately identify the alcohol content in beverages, together with a reduced marketing cost. Towards this purpose, the electronic noses prove to be the most suitable equipment for this situation. In this work, a prototype was developed to detect the concentration of ethanol in a high spectrum of beers presents in the market. It was used cheap and easy-to-acquire 13 gas sensors made with a metal oxide semiconductor (MOS). Samples with 15 predetermined alcohol contents were used for the training and construction of the models. For validation, seven different commercial beverages were used. The correlation (R2) of 0.888 for the MLR (RMSE = 0.45) and the error of 5.47% for the ELM (RMSE = 0.33) demonstrate that the equipment can be an effective tool for detecting the levels of alcohol contained in beverages.

Electronic nose based on metal oxide semiconductor sensors and pattern recognition techniques: characterisation of vegetable oils

2001 ◽  
Vol 449 (1-2) ◽  
pp. 69-80 ◽  
Author(s):  
Yolanda González Martı́n ◽  
M.Concepción Cerrato Oliveros ◽  
José Luis Pérez Pavón ◽  
Carmelo Garcı́a Pinto ◽  
Bernardo Moreno Cordero
Keyword(s):  
Pattern Recognition ◽  
Metal Oxide ◽  
Vegetable Oils ◽  
Electronic Nose ◽  
Metal Oxide Semiconductor ◽  
Oxide Semiconductor ◽  
Pattern Recognition Techniques ◽  
Semiconductor Sensors

Design and optimization of heating plate for metal oxide semiconductor gas sensor

2019 ◽  
Vol 25 (9) ◽  
pp. 3511-3519
Author(s):  
Yi Wu ◽  
Lijing Yuan ◽  
Zhongqiu Hua ◽  
Dong Zhen ◽  
Zhilei Qiu
Keyword(s):  
Metal Oxide ◽  
Gas Sensor ◽  
Metal Oxide Semiconductor ◽  
Oxide Semiconductor ◽  
Design And Optimization ◽  
Semiconductor Gas Sensor ◽  
Heating Plate

A Low Power Cantilever-Based Metal Oxide Semiconductor Gas Sensor

2019 ◽  
Vol 40 (7) ◽  
pp. 1178-1181 ◽  
Author(s):  
Dongcheng Xie ◽  
Dongliang Chen ◽  
Shufeng Peng ◽  
Yujie Yang ◽  
Lei Xu ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Low Power ◽  
Gas Sensor ◽  
Metal Oxide Semiconductor ◽  
Oxide Semiconductor ◽  
Semiconductor Gas Sensor
Sign in / Sign up

Export Citation Format

Share Document