Study on temperature influence correction of gas concentration laser spectrum detection

Thermocatalytic sensors are widely used in gas analysis systems and have high reliability and low cost. However, errors in measuring the concentration of combustible gases related to the non-linearity of the conversion characteristic and the influence of ambient temperature fluctuations significantly limit the scope of their application.Purpose of reseach. Development of a method for measuring gas concentration by thermocatalytic sensors, which allows reducing measurement errors by tuning out due to ambient temperature influence and linearization of the conversion characteristic.Problems. They are as follows: to develop a method for temperature stabilization of a thermocatalytic sensor; to make a structural and functional scheme for the sensor activation; to obtain a mathematical description of the method and substantitation for tuning out as a result of temperature influence; to experimentally confirm the possibility of linearization of the sensor conversion function in the thermal stabilization mode.Methods. The mathematical description of the method applies the theory of heat transfer and the theory of electrical circuits with discrete signals. When analyzing existing solutions and synthesizing the device, methods for calculating circuits with nonlinear elements and the theory of measurement systems have been used. The real conversion function has been obtained through an experimental method.Results. A method for measuring gas concentration by a thermocatalytic sensor with the use of a microcontroller and PWM has been developed. It allows reducing errors due to tuning out as a result of ambient temperature influence. A mathematical description of the method has been given. An experiment has been performed. It demonstrates the effectiveness of using temperature stabilization to linearize the conversion characteristic.Conclusion. The paper proposes a method for temperature stabilization of thermocatalytic gas sensors. The method makes it possible to increase the accuracy of measurements by tuning out due to the influence of temperature fluctuations and linearization of the conversion function. The possibility of linearization of the sensor function has been experimentally confirmed. It characterizes the dependence of the output signal on the concentration of combustible gas. Using this method allows you to reduce the cost of the sensor, improve the quality factors of the sensor, such as the reliability and stability of parameters.

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Gibberellin and temperature influence carbohydrate content and flowering in Phalaenopsis

Physiologia Plantarum ◽

10.1034/j.1399-3054.1994.900222.x ◽

1994 ◽

Vol 90 (2) ◽

pp. 391-395 ◽

Cited By ~ 2

Author(s):

Wen-Shaw Chen ◽

Ho-Yih Liu ◽

Zin-Huang Liu ◽

Leuan Yang ◽

Wen-Huei Chen

Keyword(s):

Carbohydrate Content ◽

Temperature Influence

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Pressure and temperature influence on tricalcium silicate hydration. A 1H and 29Si NMR study

Journal de Chimie Physique ◽

10.1051/jcp:1998140 ◽

1998 ◽

Vol 95 (2) ◽

pp. 327-331 ◽

Cited By ~ 2

Author(s):

B. Bresson ◽

H. Zanni

Keyword(s):

Tricalcium Silicate ◽

29Si Nmr ◽

Temperature Influence ◽

Nmr Study

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AN EXPERIMENTAL INVESTIGATION OF THE TEMPERATURE INFLUENCE ON THE VISCOUS MODULUS AND GELATION TRANSITION OF A POLYMERIC SOLUTION.

10.26678/abcm.cobem2017.cob17-1899 ◽

2017 ◽

Author(s):

Francisco Ricardo Cunha ◽

Igor Dal Osto Pereira

Keyword(s):

Experimental Investigation ◽

Temperature Influence ◽

Polymeric Solution ◽

Viscous Modulus

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NEAR-CRYOSCOPIC STORAGE TEMPERATURE INFLUENCE ON CHILLED DUCK MEAT SHELFLIFE DURATION INCREASING

Poultry and Chicken Products ◽

10.30975/2073-4999-2018-20-4-62-64 ◽

2018 ◽

Vol 20 (4) ◽

pp. 62-64

Author(s):

V.V. Goushchin ◽

◽

I.I. Makoveev ◽

S.S. Kozak ◽

V.S. Bragin ◽

...

Keyword(s):

Storage Temperature ◽

Temperature Influence

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ANALISIS PENGUKURAN KONSENTRASI KARBONMONOKSIDA (CO) PADA BREATHING ZONE PETUGAS PARKIR BASEMENT MALL KOTA BANDUNG

10.31219/osf.io/6p4zm ◽

2019 ◽

Author(s):

Gede H Cahyana

Keyword(s):

Air Pollution ◽

Indoor Air ◽

Indoor Air Pollution ◽

Sampling Method ◽

Breathing Zone ◽

Gas Concentration ◽

Average Value ◽

Co Concentration ◽

Personal Dosimeter ◽

Co Gas

Indoor air pollution in closed room is one of the air pollution that gives serious threats to human health. One of them come from vehicle gas emissions in closed parking area. This research identifies and analyses CO concentration measured in Mall X parking man’s breathing zone with closed parking area and in Mall Y semi-opened parking area. CO measurement carried out by passive sampling method using Personal Dosimeter Tubes. Measurement result of CO gas concentration to parking man’s breathing zone in Mall X was 25 – 81,25 ppm with average value in 50 ± 26,15 ppm. Meanwhile CO gas concentration in Mall Y gave result 3,13 – 12,5 ppm with average value in 7,88 ± 4,36 ppm. Correlation value between CO concentration and its intake in Mall X area was 0,9983, meanwhile correlation value between CO concentration and its intake in Mall Y area was 0,9903. It was concluded that CO gas concentration measured in parking man’s breathing zone influenced the differences of CO intake value in significance value.

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