Design of a Smart Gas Sensor System for Room Air-Cleaner of Automobile -Thick - Film Metal Oxide Semiconductor Gas Sensor

Kim, Jung Won; Kang, Sung Gu; Shin, Tae Joo; Yang, Myung Hwa; Lee, Kyu

doi:10.1109/ifost.2006.312250

Cited by 22 publications

(15 citation statements)

References 3 publications

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“…The sensor is interfaced with the external circuits and components via 6 pins, out of which two are used each for signal, electrodes, and heating coils, respectively [4]- [6]. The SnO2 semiconductor is the portion of the sensor that senses the gas [4], [5], [7], [8] and it has a variable resistance with gas concentration and the type; and it also possesses high resistance in clean air [9]. The sensor resistance varies with the gas concentration when they are placed in the vicinity of the gas to be sensed [8], [10], [11].…”

Section: Introductionmentioning

confidence: 99%

“…The SnO2 semiconductor is the portion of the sensor that senses the gas [4], [5], [7], [8] and it has a variable resistance with gas concentration and the type; and it also possesses high resistance in clean air [9]. The sensor resistance varies with the gas concentration when they are placed in the vicinity of the gas to be sensed [8], [10], [11]. The magnitude of the sensor circuit output signal is a function of both the concentration and type of the gas [7], [9], [12] and the nature of metal oxide used for the sensor sensing area [2], [13], [14].…”

Section: Introductionmentioning

confidence: 99%

“…The required sensor circuit parameters for the calibration and analysis of Metal Oxide (MOX) semiconductor gas sensors are: sensor activation voltage (𝑉 CC ), sensor circuit output voltage (𝑉 R𝐿 ), sensor resistance in the base gas at calibration concentration in clean air (𝑅 𝑂 ) [16], the sensor resistance (𝑅 S ) and load resistance (𝑅 L ) [4], [17]. In practice, the value of 𝑅 O is usually determined experimentally [4], because it is only the range that is normally given in the sensor datasheet; and more so it is practically impossible to have gas sensors with the same value of 𝑅 O [8], [11], [18]. Once the value of 𝑅 O is determined, the sensor resistances at different gas concentrations can then be obtained from the sensor sensitivity curve in the sensor datasheet for various types of gases under given temperature and relative humidity (RH) [2].…”

Section: Introductionmentioning

confidence: 99%

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Determination of optimum load resistances of MQ-series gas sensor circuit for specific gas concentrations

et al. 2022

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Determination of optimum load resistances of MQ-series gas sensor circuit for specific gas concentrations

et al. 2022

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“…The heating element is placed under the sensing element in order to increase the absorption rate of the metal oxide. The increased absorption rate increases the sensitivity and is essential to achieving a usable sensor 5 .…”

Section: E Metal Oxide Semiconductormentioning

confidence: 99%

Survey of Sensor Technology for Aircraft Cabin Environment Sensing

Klein

Loo

Kiepert

et al. 2011

41st International Conference on Environmental Systems

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This is an author-produced, peer-reviewed version of this article. The aircraft cabin environment is unique due to the proximity of the passengers, the need for cabin pressurization, and the low humidity. All of these aspects are complicated by the fact that the aircraft is a semi-enclosed structure. There is an increased desire to monitor the aircraft cabin environment with various sensors for comfort and safety. However, the aircraft cabin environment is composed of a large number of factors. Some of these factors can include air quality, temperature, level of pressurization, and motion of the aircraft. Therefore, many types of sensors must be used to monitor aircraft environments. A variety of technology options are often available for each sensor. Consequently, a fair number of tradeoffs need to be carefully considered when designing a sensor monitoring system for the aircraft cabin environment. For instance, a system designer may need to decide if the increased accuracy of a sensor using a particular technology is worth the increased power consumption over a similar sensor employing a more efficient, less accurate technology. In order to achieve a good solution, a designer needs to understand the tradeoffs and general operation for all of the different sensor technologies that could be used in the design. The purpose of this paper is to provide a survey of the current sensor technology. The primary focus of this paper is on sensors and technologies that cover the most common aspects of aircraft cabin environment monitoring. The first half of this paper details the basic operation of different sensor technologies. The second half covers the individual environmental conditions which need to be sensed. This will include the benefits, limitations, and applications of the different technologies available for each particular type of sensor.

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“…The high sensitivity of metal oxide sensors (MOX) has made it one of the most popular technological choices for sensor arrays [3]. The main disadvantage , however, is its lack of selectivity.…”

Section: Introductionmentioning

confidence: 99%

ANN Modeling of a Gas Sensor

Baha¹,

Dibi²

2010

Journal of Electrical Engineering and Technology

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-At present, Metal Oxide gas Sensors (MOXs) are widely used in gas detection because of its advantages, including high sensitivity and low cost. However, MOX presents well-known problems, including lack of selectivity and environment effect, which has motivated studies on different measurement strategies and signal-processing algorithms. In this paper, we present an artificial neural network (ANN) that models an MOX sensor (TGS822) used in a dynamic environment. This model takes into account dependence in relative humidity and in gas nature. Using MATLAB interface in the design phase and optimization, the proposed model is implemented as a component in an electronic simulator library and accurately expressed the nonlinear character of the response and that its dependence on temperature and relative humidity were higher than gas nature.

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Design of a Smart Gas Sensor System for Room Air-Cleaner of Automobile -Thick - Film Metal Oxide Semiconductor Gas Sensor

Cited by 22 publications

References 3 publications

Determination of optimum load resistances of MQ-series gas sensor circuit for specific gas concentrations

Determination of optimum load resistances of MQ-series gas sensor circuit for specific gas concentrations

Survey of Sensor Technology for Aircraft Cabin Environment Sensing

ANN Modeling of a Gas Sensor

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