Wyniki wyszukiwania dla: SEMICONDUCTOR GAS SENSOR

• On the selectivity of nanostructured semiconductor gas sensors

  Publikacja

  • P. Heszler
  • R. Ionescu
  • E. Llobet
  • L. Reyes
  • J. Smulko
  • L. B. Kish
  • C. G. Granqvist

  - PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS - Rok 2007

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• Fluctuation phenomena in semiconductor gas sensors

  Publikacja

  • L. Hasse
  • J. Smulko
  • L. Spiralski
  • J. Dobkowski

  - Elektronika : konstrukcje, technologie, zastosowania - Rok 2006

  Czujniki gazu mogą być wytwarzane z cienkiej warstwy półprzewodnika, która po podgrzaniu do odpowiedniej temperatury staje się czuła na gaz. Zjawisko to jest dobrze znane i szeroko opisane w literaturze. Jako wskaźnik detekcji gazu wykorzystuje się zmianę rezystancji stałoprądowej czujnika. Zwiększenie czułości i, co najważniejsze z praktycznego punktu widzenia, selektywności dyskryminacji można uzyskać jeśli warstwa półprzewodnika...

• Investigation of the temperature modulation parameters on semiconductor gas sensor response

  Publikacja

  • Ł. Woźniak
  • P. Kalinowski
  • G. Jasiński
  • P. Jasiński

  - Rok 2019

  In this work we present the results of the investigation of the sensing properties of semiconductor gas sensors with a sinusoidally modulated temperature in the presence of synthetic air (SA) and three volatile air pollutants, i.e. NH3, NO2 and SO2. The measurements were performed for different average sensor heater temperatures and the amplitude of the modulation signal. In addition, the extraction of features from the sensor...

• Gas sampling system for matrix of semiconductor gas sensors

  Publikacja

  • G. Jasiński
  • A. Strzelczyk
  • P. A. Kościński

  - IOP Conference Series: Materials Science and Engineering - Rok 2016

  Semiconductor gas sensors are popular commercial sensors applied in numerous gas detection systems. They are reliable, small, rugged and inexpensive. However, there are a few problem limiting the wider use of such sensors. Semiconductor gas sensor usually exhibits a low selectivity, low repeatability, drift of response, strong temperature and moisture influence on sensor properties. Sample flow rate is one of the parameters that...

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• Determination of chlorine concentration using single temperature modulated semiconductor gas sensor

  Publikacja

  • Ł. Woźniak
  • P. Kalinowski
  • G. Jasiński
  • P. Jasiński

  - Rok 2016

  A periodic temperature modulation using sinusoidal heater voltage was applied to a commercial SnO2 semiconductor gas sensor. Resulting resistance response of the sensor was analyzed using a feature extraction method based on Fast Fourier Transformation (FFT). The amplitudes of the higher harmonics of the FFT from the dynamic nonlinear responses of measured gas were further utilized as an input for Artificial Neural...

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• FFT analysis of temperature modulated semiconductor gas sensor response for the prediction of ammonia concentration under humidity interference

  Publikacja

  • Ł. Woźniak
  • P. Kalinowski
  • G. Jasiński
  • P. Jasiński

  - MICROELECTRONICS RELIABILITY - Rok 2018

  The increasing environmental contamination forces the need to design reliable devices for detecting of the volatile compounds present in the air. For this purpose semiconductor gas sensors, which have been widely used for years, are often utilized. Although they have many advantages such as low price and quite long life time, they still lack of long term stability and selectivity. Namely, environmental conditions have significant...

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• Real-time working gas recognition system based on the array of semiconductor gas sensors and portable computer Raspberry PI

  Publikacja

  • E. Ardanowska
  • P. Kalinowski
  • Ł. Woźniak
  • G. Jasiński
  • P. Jasiński

  - Rok 2013

  The gas-analyzing systems based on the array of partially selective gas sensors and pattern-recognition techniques are potentially fast and low-cost alternative for other devices, like gas analysers. They give the possibility of recognition the type and the concentration of measured volatile compounds in their working environment. In this work we present the implementation of gas recognition system, in which the signals from an...

• Gas detection in semiconductor sensors using fluctuation phenomena

  Publikacja

  • L. Hasse
  • J. Smulko
  • L. Spiralski

  - Rok 2005

  Rozpatrzono problemy pomiaru szumów, kóre należy rozwiązać, gdy szumy traktuje się jako dodatkowe źródło informacji o gazach. Metoda szumowa (spektroskopia szumów rezystancyjnych, widma wyższych rzędów) daje więcej informacji polepszając czułość i seleKtywność czujnika.

• Hydrogen sulphide electrocatalytic gas sensor

  Publikacja

  • A. Strzelczyk
  • G. Jasiński
  • B. Chachulski
  • P. Jasiński

  - Microelectronics materials and technologies - Rok 2012

  In this article measurement results of the electrocatalytic gas sensor in different concentrations of hydrogen sulphide are presented. Working principle of such sensor is based on electric current acquisition, while voltage ramp is applied to the sensor. During voltage sweep oxidation and reduction reactions occurs on the sensor electrodes. Obtained current-voltage plot has unique shape connected...

• Electrocatalytic gas sensor with reference layer

  Publikacja

  • A. Strzelczyk
  • P. Lorenc
  • G. Jasiński

  - Rok 2014

  In recent years electrochemical gas sensors based on solid state electrolytes have been intensively developed. They are easy to obtain, use and relative durable. Nasicon is one of the most promising materials, which have been used in construction of gas sensors. Most of these devices work in potentiometric or amperometric mode. However, some works are dedicated to sensors working in electrocatalytic mode. Principle of operation...