Thermistor-Based Nematic Liquid Crystal IM95100-000

Sun, Jingjing; Wu, Keming; Fan, Meng; Meng, Fanxi; Cai, Minglei; Zhao, Tongzhou; Yang, Changyong; Xing, Hongyan; Ye, Wenjiang

doi:10.1109/ted.2021.3084543

Cited by 3 publications

(1 citation statement)

References 38 publications

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“…A distinctive feature of thermistors is the highly non-linear dependence of resistance with temperature, which is a fact to consider even with modern cutting-edge materials and manufacturing technologies [19]. To compensate for this, various approaches have been made to linearise the response-from hardware-based signal conditioning circuits to computer-based solutions or their combinations, implementing modern techniques, such as artificial neural networks [20] and field-programmable arrays (FPGA) [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Algorithm Execution Time and Accuracy of NTC Thermistor-Based Temperature Measurements in Time-Critical Applications

2021

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This paper addresses the challenges of selecting a suitable method for negative temperature coefficient (NTC) thermistor-based temperature measurement in electronic devices. Although measurement accuracy is of great importance, the temperature calculation time represents an even greater challenge since it is inherently constrained by the control algorithm executed in the microcontroller (MCU). Firstly, a simple signal conditioning circuit with the NTC thermistor is introduced, resulting in a temperature-dependent voltage UT being connected to the MCU’s analog input. Next, a simulation-based approximation of the actual temperature vs. voltage curve is derived, resulting in four temperature notations: for a look-up table principle, polynomial approximation, B equation and Steinhart–Hart equation. Within the simulation results, the expected temperature error of individual methods is calculated, whereas in the experimental part, performed on a DC/DC converter prototype, required prework and available MCU resources are evaluated. In terms of expected accuracy, the look-up table and the Steinhart–Hart equation offer superior results over the polynomial approximation and B equation, especially in the nominal temperature range of the NTC thermistor. However, in terms of required prework, the look-up table is inferior compared to the Steinhart–Hart equation, despite the latter having far more complex mathematical functions, affecting the overall MCU algorithm execution time significantly.

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Section: Introductionmentioning

confidence: 99%

Algorithm Execution Time and Accuracy of NTC Thermistor-Based Temperature Measurements in Time-Critical Applications

2021

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A Tutorial on Thermal Sensors in the 200th Anniversary of the Seebeck Effect

Reverter

2021

IEEE Sensors J.

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Two noteworthy events associated to the physics of thermal sensors were demonstrated and announced in 1821, exactly two hundred years ago. The first event was the Seebeck effect, which led to the development of thermocouples. The second was the study of the thermal dependence of the resistivity of pure metals, which led to the design of resistance temperature detectors (RTD). Sensors' science and technology has experienced remarkable advances in the last decades, but these two types of thermal sensors, whose physics were announced 200 years ago, are still nowadays the main sensor technology in many industrial applications that require the measurement of extreme temperatures. In such a 200 th anniversary, this tutorial aims to explain the operating principle, subtypes, input-output characteristic, limitations, and new trends under research of the four main types of thermal sensor: RTDs, thermistors, silicon sensors, and thermocouples. These are also compared with each other, highlighting the main advantages and disadvantages of each sensor technology.

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Flexible Liquid Crystal Thermistor and Its Application in Temperature Sensor

Meng

Fan

et al. 2022

IEEE Trans. Electron Devices

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Thermistor-Based Nematic Liquid Crystal IM95100-000

Cited by 3 publications

References 38 publications

Algorithm Execution Time and Accuracy of NTC Thermistor-Based Temperature Measurements in Time-Critical Applications

Algorithm Execution Time and Accuracy of NTC Thermistor-Based Temperature Measurements in Time-Critical Applications

A Tutorial on Thermal Sensors in the 200th Anniversary of the Seebeck Effect

Flexible Liquid Crystal Thermistor and Its Application in Temperature Sensor

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