Analysis and research of methods of linearization of the transfer function of precision semiconductor temperature sensors

The analysis of the nonlinearity of the transfer function of primary temperature transducers based on transistor structures has been performed. It’s shown that the quadratic component of the transfer function creates a significant nonlinearity error up to 0,2-0,6°C. We have developed methods of linearization based on both the formation of compensatory measuring current and change of the conversion factor of the output scaling amplifier at certain ranges of temperature measurement, which ensure their use in precision temperature measuring devices. The measurement error does not exceed 0.01°C in the range of 30-100°C.

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Evaluation of Thermistors Used for Temperature Measurement in Automotive Industry

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.880.157 ◽

2018 ◽

Vol 880 ◽

pp. 157-162

Author(s):

Dragos Tutunea ◽

George Gherghina ◽

Ilie Dumitru ◽

Alexandru Dima

Keyword(s):

Temperature Measurement ◽

Automotive Industry ◽

Temperature Sensors ◽

Scientific Applications ◽

Mathematical Functions ◽

Automotive Systems ◽

Temperature Measuring ◽

Research Activities ◽

Ntc Thermistors

Temperature sensors are widely used in different industrial and scientific applications. These sensors commercially available in various type and configurations allow the enhancement of automotive systems. The manufactures need to improve and upgrade the technology by research activities regarding the accuracy of temperature measuring using sensors. In this paper will analyze the trends, applications and technologies in automotive temperature sensors. PTC/NTC thermistors are measured and characteristics curves are determined as expression of mathematical functions.

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STUDI RENCANA ALAT PENGUKUR PANAS PADA MUAI LOGAM

Jurnal Teknika ◽

10.30736/jt.v11i2.343 ◽

2019 ◽

Vol 11 (2) ◽

pp. 1123

Author(s):

Ulul Ilmi

Keyword(s):

Temperature Measurement ◽

Measurement Tool ◽

Test Results ◽

Research Activity ◽

Measuring Device ◽

Temperature Measuring ◽

Measuring Devices ◽

Lcd Display

Measurement is the process of comparing measuring devices against measured objects. For measurement of magnitude, a measurement tool is needed. In this research activity, the object to be measured is the temperature at the metal expansion. To realize this goal, it is necessary to study the temperature measuring device on the metal expansion. The sensor used for temperature measuring devices is LM35 which is equipped by Arduino and LCD. Based on the test results obtained voltage values measured by a multimeter with an LCD display close to 100 percent or about 99.99 percent. With these results, it can be concluded that the temperature measurement meter is in accordance with the expected research objectives.

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Calculation of the components of the temperature measurement error by a resistance thermocouple of an installed unbalanced bridge

Journal of Physics Conference Series ◽

10.1088/1742-6596/2094/5/052015 ◽

2021 ◽

Vol 2094 (5) ◽

pp. 052015

Author(s):

A Leonov ◽

N Zh Shkaruba ◽

G N Temasova

Keyword(s):

Measurement Error ◽

Temperature Measurement ◽

Supply Voltage ◽

Voltage Drop ◽

Measurement Range ◽

Nonlinearity Error ◽

Measuring Device ◽

Unbalanced Bridge ◽

Voltage Drops ◽

Grain Drying

Abstract The article has devoted to solving an urgent problem related to the determination and calculation of the components of the temperature measurement error. A grain drying machine had selected as the object of research, in which the temperature of the grain at the exit from the machine is measured with the help of a Cu50 resistance thermocouple installed in an unbalanced bridge. It had found that the scale of the measuring device, calibrated in degrees Celsius, will have a nonlinearity error, which increases towards the end of the measurement range. For the Cu50 resistance thermocouple installed in the grain drying machine, when measuring the temperature in the range of 0 … 100 °C in absolute terms, the nonlinearity error was 0.3 mA, in relative terms - 4.4 %, which is quite large. The measurement error has calculated with a tolerance for the nominal resistance of the thermistor ± 0.1 Ohm, which in the given form was 0.5%. The resulting value indicates that this component will have an insignificant effect on the total measurement error. The measurement error due to the supply voltage drop by 0.2 V in relative form was 4.2 %. Thus, the voltage drops when using an unbalanced bridge will have a significant effect on the measurement result.

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An Evaluation of Body Temperature Measurement

Anaesthesia and Intensive Care ◽

10.1177/0310057x8301100107 ◽

1983 ◽

Vol 11 (1) ◽

pp. 31-39 ◽

Cited By ~ 30

Author(s):

A. H. Ilsley ◽

A. J. Rutten ◽

W. B. Runciman

Keyword(s):

Body Temperature ◽

Temperature Measurement ◽

Reference Value ◽

Temperature Measurements ◽

Axillary Temperature ◽

Measuring Device ◽

Temperature Measuring ◽

Measuring Devices ◽

Bladder Temperature ◽

Body Temperature Measurement

The accuracy of routine body temperature measurements, the suitability of various sites for such measurements, and the performance and practicality of various temperature measuring devices were studied. Oral and axillary temperature measurements made by the nursing staff were within 1°C of a reference value (within 0.5 °C in 67%). Both sites were suitable for routine ward temperature measurement. Mercury-in-glass thermometers are recommended for routine ward use. Electronic and disposable chemical thermometers cost more but the latter are suitable in uncooperative patients and children. Forehead skin temperature measurements using liquid crystal plastic discs were unreliable. Pulmonary artery and rectal temperature measurements were satisfactory in operating theatre and intensive care unit; however, electronic thermometers should be subjected to routine checks. The bladder temperature measuring device proved unsuitable for clinical use. When oesophagus, nasopharynx and tympanum sites are used careful placement is necessary to minimise trauma and obtain reliable measurements.

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Total Temperature Measurement of Gas at Microtube Outlet

Volume 8: Heat Transfer and Thermal Engineering ◽

10.1115/imece2017-71146 ◽

2017 ◽

Author(s):

Takeya Sakashita ◽

Chungpyo Hong ◽

Yutaka Asako

Keyword(s):

Glass Fiber ◽

Temperature Measurement ◽

Outer Diameter ◽

Temperature Measuring ◽

Measuring Devices ◽

Polystyrene Tube ◽

Measuring Tube ◽

Total Temperature ◽

Inner Diameter ◽

Thomson Coefficient

This paper describes experimental results on the total temperature measurement of gas at the microtube exit. In order to measure the total temperature at the microtube outlet, two total temperature measuring devices with different structures were fabricated. One is six plastic baffle plates embedded inside with a thermally insulated exterior foamed polystyrene tube. The other is two glass fiber thimbles embedded inside it. The gas velocity was reduced by the plastic plates and the glass fiber thimbles, and the kinetic energy was converted into thermal energy. The fundamental premise of the total temperature measurement is the Joule Thomson effect present in real gases, which for a positive of the Joule Thomson coefficient involves the decrease in temperature when the gas experiences isenthalpic expansion. A PEEK microtube whose nominal inner diameter and outer diameter were 500 μmm and 1.6 mm, was used for assessing exact measurement of total temperature in the temperature measuring tube, since the thermal conductivity of the PEEK tube is very low. The measured total temperatures were compared with those obtained theoretically with the Joule Thomson coefficient and given thermodynamics properties.

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