Linearization Circuit of the Thermistor Connection

Nenova, Zvezditza; Nenov, Toshko

doi:10.1109/tim.2008.2003320

Cited by 80 publications

(21 citation statements)

References 13 publications

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“…Thermistor with NTCR has been widely used not only  in various industrial and domestic applications pertaining to temperature monitoring, control and compensation, etc., but also in laboratory and medical procedures. NTCR thermistor is widely used in the world due to its potential use for many applications, such as temperature measurement, circuit compensation, suppression of inrush current, flow rate sensor, pressure sensor, aerospace, and automotive temperature measurement [5][6][7]. Along with the advances in modern technology, demand for precise temperature measurement and control has increased.…”

Section: Introductionmentioning

confidence: 99%

CaTiO3 nano ceramic for NTCR thermistor based sensor application

2014

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Abstract:It is possible to fabricate highly sensitive NTCR (negative temperature coefficient of resistance) thermistor using nano crystalline CaTiO 3 synthesized by high energy ball milling. Disc shaped green pellets were prepared and effects of sintering on the disc pellets were studied as thermistor by sintering the samples at 1000 ℃, 1100 ℃ and 1200 ℃. The as-prepared samples were characterized by X-ray diffraction (XRD), impedance analysis and electrical measurement. The resistivity of the prepared samples varies predictably with temperature: this makes them promising material for temperature sensor. The experimental results prove that nano crystalline CaTiO 3 ceramic is one kind of thermistor with exponential negative temperature coefficient of resistance in the temperature range of 300-500 ℃. The samples have the advantages of rapid response, high sensitivity and capability to withstand thermal surges over the temperature range of 300-500 ℃. Resistance-temperature characteristics are described by thermistor equation with thermistor constant around 4003 K to 10795 K and thermal coefficient of resistance α around 1%/℃ to 13%/℃. The activation energy is in the range of 0.34-0.93 eV. The observed thermistor parameters are found to be comparable with many of the known thermistor materials. This suggests that the electrical properties can be adjusted to desirable values by controlling the temperature parameter. The influence of fabrication process of disc thermistor and electrical properties are discussed. The study shows the potential of nano crystalline CaTiO 3 to act as an NTCR material for thermistor applications.

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Section: Introductionmentioning

confidence: 99%

CaTiO3 nano ceramic for NTCR thermistor based sensor application

2014

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“…This property makes them particularly responsive to the temperature changes during T-history measurements. The main disadvantage of thermistors is the nonlinear change of their resistance with temperature [24]. These sensors require the application of the suitable linearization technique prior to any utilization.…”

Section: Methodsmentioning

confidence: 99%

Improved measurement technique for the characterization of organic and inorganic phase change materials using the T-history method

Stanković

Kyriacou

2013

Applied Energy

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“…Thermistors were selected for the temperature measurements due to their high sensitivity and responsiveness to the temperature changes in T-history measurements [14]. The main disadvantage of thermistors is the nonlinear temperature-resistance response [15]. Therefore, an appropriate instrumentation system for thermistor linearisation, signal amplification and filtering had to be used.…”

Section: Thermal Characterisationmentioning

confidence: 99%

Experimental and numerical investigations of the optical and thermal aspects of a PCM-glazed unit

Gowreesunker

Stanković

Tassou

et al. 2013

Energy and Buildings

121

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This paper reports on the experimental and numerical analysis of the optical and thermal aspects of PCM (Phase Change Material) RT27 when subjected to an irradiation source of energy. The analysis is separated into the thermal and optical characterisation of the PCM using the T-history method and spectrophotometry principles, respectively, and the experimental and numerical performance evaluation of a PCM-Glazed unit. Various relationships describing the variations in the extinction, scattering and absorption coefficients with respect to the liquid fraction/ temperature within the phase change region were developed from the experimental setup, and were validated in a numerical CFD model. The results show that: i) during rapid phase changes, the transmittance spectra from the PCM are unstable, while under stable conditions a visible transmittance value of 90% and 40% are obtained for the liquid and phases, respectively; ii) the radiation scattering effects are more prominent in the solid phase of the PCM, while radiation absorption dominates in the liquid phase; iii) the optical/ radiation performance of PCM can be successfully modelled using the liquid fraction term as the main variable, in a similar way that the enthalpy porosity method is employed for phase change processes; iv) relative to a standard double glazed unit, the addition of PCM improves the thermal mass of the unit during phase change, but depending on specific

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Linearization Circuit of the Thermistor Connection

Cited by 80 publications

References 13 publications

CaTiO3 nano ceramic for NTCR thermistor based sensor application

CaTiO3 nano ceramic for NTCR thermistor based sensor application

Improved measurement technique for the characterization of organic and inorganic phase change materials using the T-history method

Experimental and numerical investigations of the optical and thermal aspects of a PCM-glazed unit

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