Temperature measurements by means of NTC resistors and a two-parameter approximation curve

Vertical temperature profiles represent a very important factor for various analytical and numerical studies, such as weather forecasts, air pollution models and CFD simulations. These temperature profiles are especially important during the winter periods, when temperature inversions occur. The cities in the natural valleys, such as the city of Sarajevo, B&H, are strongly affected by this phenomenon. In this paper, a method for quantitative characterization of vertical temperature profiles, which is based on the in-house developed data acquisition system and the unmanned aerial vehicle, is presented. Comprehensive calibration and verification procedure was performed and explained in details. Field measurements were focused on the winter period and extreme temperature inversion scenarios. The correlation with the air pollution in the city, for the same period, was discussed as well.

show abstract

“…Alternatively, the polynomial fit of the fifth order could be used as well, or similar approach proposed in [15].…”

Section: Calibration and Verificationmentioning

confidence: 99%

Experimental study of temperature inversions above urban area using unmanned aerial vehicle

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Although highly nonlinear, thermistors are also used in temperature sensing due to their high sensitivity and low cost. Linearization of thermistors has found an extensive interest among researchers [3,4].…”

Section: Sensors In Mechatronicsmentioning

confidence: 99%

“…where T is in K, and A, B, and C are the thermistor coefficients given by the manufacturers, or you can calculate these values to obtain better accuracy using least-square method with the thermistor table data [3,4].…”

Section: Sensors In Mechatronicsmentioning

confidence: 99%

Sensors and Digital Signal Conditioning in Mechatronic Systems

Engin¹,

Engin²

2017

Design, Control and Applications of Mechatronic Systems in Engineering

View full text Add to dashboard Cite

Essential part of a mechatronics system is the measurement system that senses the variations in the physical parameters, such as temperature, pressure, displacement, and so on, and converts it to voltage or current. The control of industrial processes and automated manufacturing systems requests accurate, moreover, linearized sensor measurements, where numerous sensors have nonlinear characteristics. In mechatronic systems, accurate measurement of the dynamic variables plays a vital role for the actuators to function properly. This chapter presents linearization methods and a measurement system in mechatronics consisting of temperature sensors and the signal-conditioning circuits, providing detailed information on design process of an embedded measurement and linearization system. This system uses a 32-bit microcontroller for thermocouple (T/C) cold junction compensation, amplification of low output voltage, then conversion to digital, and linearization of the type K thermocouple's output by software to output a desired signal. Piecewise and polynomial methods are used in linearization software, and the implemented embedded system for the linearization of a type K T/C is presented as a case study. The obtained results are compared to give an insight to the researchers who work on measurement systems in mechatronics.

show abstract

“…In this context the drive for miniaturisation demands possibilities to integrate thermometers together with other electronic components. The most often used options include thermocouples 3,4 and resistive thermometers (thermistors) 5,6 , the later ones offering robust and cost-effective manufacturing with a considerably good stability and accuracy (reaching <0.01 °C for metallic thermistors). Silicon thermistors, although they are not as sensitive as the metallic, can be attractive because they can be integrated into electronic circuits like Complementary Metal Oxide Semiconductor (CMOS) circuits, MEMS, and Lab-on-a-Chip (LoC) devices taking advantages of the well-established silicon fabrication techniques.…”

Section: Introductionmentioning

confidence: 99%

Single step fabrication of Silicon resistors on SOI substrate used as Thermistors

Rollo

Rani

Olthuis

et al. 2019

Sci Rep

View full text Add to dashboard Cite

Temperature sensing is one of the important features of Micro Electro Mechanical Systems and a monolithic integration provides advantages for both fabrication simplicity and performance. The use of Silicon On Insulator substrates allows simple fabrication of integrated wires that can be used as thermistors. We fabricated rectangular and triangular silicon wires with different dimensions in a single step fabrication process based on the wet etching of a <110> Silicon On Insulator substrate. We determined the experimental resistivity of the two kinds of devices and tested their performance as thermistors in a temperature range between 24 and 100 °C. The accuracy and normalized sensitivities of our devices were 0.4 °C and 0.3–0.5%/°C, respectively. The potential of the proposed method resides in the possibility of having devices with different shapes in a single straightforward process.

show abstract

Temperature measurements by means of NTC resistors and a two-parameter approximation curve

Cited by 21 publications

References 1 publication

Experimental study of temperature inversions above urban area using unmanned aerial vehicle

Experimental study of temperature inversions above urban area using unmanned aerial vehicle

Sensors and Digital Signal Conditioning in Mechatronic Systems

Single step fabrication of Silicon resistors on SOI substrate used as Thermistors

Contact Info

Product

Resources

About