Differential heat-flow-type warmth sensor for object material discrimination with reduced sensor output error due to object temperature

2022 ◽  
pp. 113371
Author(s):  
Ryoga Mori ◽  
Yutaka Nonomura ◽  
Yoshiyuki Hata
Keyword(s):  
Heat Flow ◽  
Sensor Output ◽  
Differential Heat ◽  
Output Error ◽  
Flow Type ◽  
Object Temperature ◽  
Material Discrimination ◽  
Object Material

Heat-Flow-Type Warmth Sensor with Sub-Second Response for Material Discrimination

2021 ◽  
Vol 141 (6) ◽  
pp. 153-163
Author(s):  
Ryoga Mori ◽  
Sota Higuchi ◽  
Yuya Ohashi ◽  
Hayato Tsuchiya ◽  
Yoshiyuki Hata ◽  
...  
Keyword(s):  
Heat Flow ◽  
Flow Type ◽  
Material Discrimination

A Design Study of a Heat Flow-Type Reading Head for a Linear Encoder Based on a Micro Thermal Sensor

2019 ◽  
Vol 2 (2) ◽  
pp. 100-110 ◽  
Author(s):  
Yuki Shimizu ◽  
Ayaka Ishida ◽  
Yuki Matsuno ◽  
Hiraku Matsukuma ◽  
Wei Gao
Keyword(s):  
Heat Flow ◽  
Thermal Sensor ◽  
Design Study ◽  
Flow Type ◽  
Linear Encoder

scholarly journals Characterization of Low Level Wastes: a new design for calorimetric measurement

2018 ◽  
Vol 170 ◽  
pp. 07003
Author(s):  
Kévin Galliez ◽  
Guillaume Jossens ◽  
Alain Godot ◽  
Christophe Mathonat
Keyword(s):  
Heat Flow ◽  
Environmental Changes ◽  
Thermal Power ◽  
Radioactive Decay ◽  
Nuclear Material ◽  
Differential Heat ◽  
Flow Calorimeter ◽  
Wide Range ◽  
First Results ◽  
Non Destructive

Calorimetry is one of the best solutions to estimate the overall quantity of nuclear material on a wide range of masses, from a few milligrams up to kilograms of radionuclides, by measuring the overall thermal power due to the radioactive decay coming from the waste contained in a metallic drum or a different type of container. It has many advantages as it features a non-destructive method which remains independent of matrix effect or the chemical composition. Until now, calorimetry allows to measure at the lowest 0.5 to 1 mW for samples up to 385 liters. But nowadays, thanks to new technological breakthroughs, KEP-Technologies calorimeters are able to measure as low as 50 μW for 40 liters samples. The μLVC is based on a new design with twin cells, a new temperature regulation loop and a heat-flow measurement system inside a vacuum chamber (Patent deposit P005299 LA/VL). The μLVC is a differential heat-flow calorimeter for precise measurement independent of the residual fluctuations caused by environmental changes. The new calorimeter is an industrial product able to work in environmental conditions with wide temperature variations. The first results have shown a great improvement in the detection of very low thermal effect thanks to the thermal noise reduction. The paper presents the developments in Large Volume Calorimetry as a new tool for quantification of nuclear material to characterize Pu-Am samples, i-graphite, and low tritium samples with high precision and reliability.

scholarly journals APPROXIMATION OF HYSTERESIS DENSITY FUNCTION IN STRETCH SENSOR

2014 ◽  
pp. 274-280
Author(s):  
VIPIN S. VIBHUTE ◽  
ABHAY KSHIRSAGAR
Keyword(s):  
Experimental Data ◽  
Relaxation Time ◽  
Hysteresis Loop ◽  
Density Function ◽  
Preisach Model ◽  
Sensor Output ◽  
Scientific Instruments ◽  
Output Error ◽  
Polymer Component ◽  
Noise Error

Stretch SensorTM developed by Images Scientific Instruments Inc, USA, is a unique polymer component that changes resistance when stretched. When sensor is stretched and released it exhibits hysteresis and large relaxation time. For identification of hysteresis and relaxation, Preisach model is a very well-known method. Experiments are carried out using tension tester and the experimental data is used for identification. Modified Preisach model is used for relaxation identification and the experimental data is discretized for analysis of relaxation. Identification is based on first reversal curve of major hysteresis loop and noise error of sensor. It has been observed that if sensor is used in pre-stretch conditions, relaxation time is reduced. Also more the iterations of stretch, hysteresis is reduced and sensor output error is also reduced. Hysteresis and relaxation time cannot be eliminated because they are inherent properties of polymer but can be compensated under specific conditions. Compensation is useful for calibration of the sensor.

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