Multi-Channel Virtual Instrument for Measuring Temperature—A Case Study

Masnicki, Romuald; Świsulski, Dariusz

doi:10.3390/electronics12102188

Cited by 3 publications

(1 citation statement)

References 33 publications

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“…Romuald Masnicki and Dariusz Swisulski designed a multi-channel virtual device using NTC thermistors as temperature measuring elements. In this design, the NTC thermistor is calibrated using the Steinhart-Hart equation and the device has a measurement accuracy of 0.4 • C [16]. NTC thermistors are semiconductor ceramic elements made of transition metal oxides, whose resistance decreases with increasing temperature [17].…”

Section: Introductionmentioning

confidence: 99%

Design of a Negative Temperature Coefficient Temperature Measurement System Based on a Resistance Ratio Model

Liu,

Huo,

Yan

et al. 2024

Sensors

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In this paper, a temperature measurement system with NTC (Negative Temperature Coefficient) thermistors was designed. An MCU (Micro Control Unit) primarily operates by converting the voltage value collected by an ADC (Analog-to-Digital Converter) into the resistance value. The temperature value is then calculated, and a DAC (Digital-to-Analog Converter) outputs a current of 4 to 20 mA that is linearly related to the temperature value. The nonlinear characteristics of NTC thermistors pose a challenging problem. The nonlinear characteristics of NTC thermistors were to a great extent solved by using a resistance ratio model. The high precision of the NTC thermistor is obtained by fitting it with the Hoge equation. The results of actual measurements suggest that each module works properly, and the temperature measurement accuracy of 0.067 °C in the range from −40 °C to 120 °C has been achieved. The uncertainty of the output current is analyzed and calculated with the uncertainty of 0.0014 mA. This type of system has broad potential applications in industry fields such as the petrochemical industry.

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Section: Introductionmentioning

confidence: 99%

Design of a Negative Temperature Coefficient Temperature Measurement System Based on a Resistance Ratio Model

Liu,

Huo,

Yan

et al. 2024

Sensors

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Heat Dissipation From the Power Cable in the Casing Pipe

Masnicki,

Mindykowski,

Palczynska

2024

IEEE Trans. on Ind. Applicat.

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Experiment-Based Study of Heat Dissipation from the Power Cable in a Casing Pipe

Masnicki

Mindykowski²,

Pałczyńska³

2022

Energies

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The paper deals with the important challenges in terms of electricity transmission by means of underground cable lines. The power cable’s performance is characterized by an ampacity that represents its maximum electric current-carrying capacity. The ampacity of power cables depends on their ability to diffuse the heat generated by the current flow into the environment. In the performed research, the analysis of the efficiency of heat dissipation from the cable is based on the measurement of temperatures at selected points in individual sections of the cable. As a consequence, the proposed test stand and applied research methodology are vital for the experimental evaluation of the analyzed thermal phenomena in the investigated underground cable lines. The research program covers an in-depth analysis based on the results related to the vital parameters of the investigated cable. The experimental methodology was used to analyze the influence of the properties of the medium surrounding the cable on its temperature, and thus on the ampacity of the cable. A novelty of this paper concerns the carrying out of the experimental laboratory research with actual measurements of the temperature distribution in specific points of the casing pipe based on the original test stand. The paper presents the novel concept of the developed stand for testing heat dissipation from the cable in a casing pipe with pipe sections filled with various media, equipped with a power supply system ensuring easy control of the power dissipated in the cable. The preliminary results of the comparative tests, in which the temperature distribution in the sections of the casing pipes was recorded, indicate that the findings are satisfactorily consistent with the assumptions related to the purpose of the research. The use of appropriate materials surrounding the cable contributes to more effective heat dissipation, and as it has been shown for the examined case in originally planned and conducted tests, it can lower the cable temperature by more than 20 °C, contributing to a significant increase in the ampacity of the cable. For example, it was recorded that for different media filling the pipes, the cable reached 30 °C with different currents flowing through cable of 60 A and 120 A, respectively.

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Multi-Channel Virtual Instrument for Measuring Temperature—A Case Study

Cited by 3 publications

References 33 publications

Design of a Negative Temperature Coefficient Temperature Measurement System Based on a Resistance Ratio Model

Design of a Negative Temperature Coefficient Temperature Measurement System Based on a Resistance Ratio Model

Heat Dissipation From the Power Cable in the Casing Pipe

Experiment-Based Study of Heat Dissipation from the Power Cable in a Casing Pipe

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