The Experts below are selected from a list of 3819 Experts worldwide ranked by ideXlab platform
Qian Jin - One of the best experts on this subject based on the ideXlab platform.
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Cold-Junction Compensation and Signal Linearization of Thermocouple Temperature Sensor
Journal of Changjiang Vocational University, 2004Co-Authors: Qian JinAbstract:Basic principle and features of signal of thermocouple temperature sensor are introduced, several methods of Cold-Junction Compensation are provided, and the linearization rule of thermocouple temperature signal is released too.
Sugata Munshi - One of the best experts on this subject based on the ideXlab platform.
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An analog signal conditioning circuit for thermocouple temperature sensor employing thermistor for cold junction Compensation
2013 International Conference on Control Automation Robotics and Embedded Systems (CARE), 2013Co-Authors: Anish Mukherjee, Debarghya Sarkar, Sugata MunshiAbstract:Thermocouples are widely used as temperature sensors in industrial as well as laboratory settings owing to their low cost, usability and stability over a wide range of temperatures. However limitations arise in the form of cold junction Compensation and non-linearity of the thermocouple emf. The present paper proposes an analog signal conditioning circuit that performs the dual task of cold junction Compensation and linearization. Cold junction Compensation is done using a thermistor based circuit to emulate the output voltages of the thermocouple at different ambient temperatures with respect to 0°C, and linearization is performed by employing a temperature-compensated dual-input logarithmic amplifier. Optimum circuit parameters have been found by standard optimizations methods, and simulations have been performed using a circuit simulation software `PSpice' by considering the characteristics of a 5kΩ thermistor and a T-type Copper Constantan Thermocouple. Nonlinearity errors and variation of output voltage of the signal conditioning circuit with ambient temperature are investigated from the simulation results.
Anish Mukherjee - One of the best experts on this subject based on the ideXlab platform.
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An analog signal conditioning circuit for thermocouple temperature sensor employing thermistor for cold junction Compensation
2013 International Conference on Control Automation Robotics and Embedded Systems (CARE), 2013Co-Authors: Anish Mukherjee, Debarghya Sarkar, Sugata MunshiAbstract:Thermocouples are widely used as temperature sensors in industrial as well as laboratory settings owing to their low cost, usability and stability over a wide range of temperatures. However limitations arise in the form of cold junction Compensation and non-linearity of the thermocouple emf. The present paper proposes an analog signal conditioning circuit that performs the dual task of cold junction Compensation and linearization. Cold junction Compensation is done using a thermistor based circuit to emulate the output voltages of the thermocouple at different ambient temperatures with respect to 0°C, and linearization is performed by employing a temperature-compensated dual-input logarithmic amplifier. Optimum circuit parameters have been found by standard optimizations methods, and simulations have been performed using a circuit simulation software `PSpice' by considering the characteristics of a 5kΩ thermistor and a T-type Copper Constantan Thermocouple. Nonlinearity errors and variation of output voltage of the signal conditioning circuit with ambient temperature are investigated from the simulation results.
Viren Menezes - One of the best experts on this subject based on the ideXlab platform.
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performance evaluation of coaxial thermocouple against platinum thin film gauge for heat flux measurement in shock tunnel
Measurement, 2015Co-Authors: Kiran Joy Irimpan, Nithin Mannil, Hemendra Arya, Viren MenezesAbstract:Abstract Data on surface heat flux is critical in all hypersonic missions due to the extent of risk and the penalty associated, when it is not properly accounted for. In the present study an E-type coaxial thermocouple has been designed, fabricated, validated and benchmarked against a more established platinum thin film sensor. The study proves that coaxial thermocouples used in impulse facilities do not require cold junction Compensation. The comprehensive study conducted in IIT Bombay Shock Tunnel (IITB-ST) has confirmed the performance, ruggedness and reliability of the coaxial thermocouple, ascertaining it to be an effective, impulse, heat flux sensor.
Dongming Zhu - One of the best experts on this subject based on the ideXlab platform.
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ceramic thin film thermocouples for sic based ceramic matrix composites
Thin Solid Films, 2012Co-Authors: John D. Wrbanek, Gustave C. Fralick, Dongming ZhuAbstract:Abstract Conductive ceramic thin film thermocouples were investigated for application to silicon carbide fiber reinforced silicon carbide ceramic matrix composite (SiC/SiC CMC) components. High temperature conductive oxides based on indium and zinc oxides were selected for testing to high temperatures in air. Sample oxide films were first sputtered-deposited on alumina substrates then on SiC/SiC CMC sample disks. Operational issues such as cold junction Compensation to a 0 °C reference, resistivity and thermopower variations are discussed. Results show that zinc oxides have an extremely high resistance and thus increased complexity for use as a thermocouple, but thermocouples using indium oxides can achieve a strong, nearly linear response to high temperatures.