The Experts below are selected from a list of 168 Experts worldwide ranked by ideXlab platform
Pierre Thureau - One of the best experts on this subject based on the ideXlab platform.
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New thermal Fluxmeters using particular auxiliary walls and zero-balanced methods of measurement
Sensors and Actuators A: Physical, 1993Co-Authors: Pierre ThureauAbstract:Abstract Using microelectronics methods, it is possible to realize thermal non-intrusive Fluxmeters showing interesting characteristics: low thickness and high sensitivity. One special arrangement enables either an autocalibration or a zero-balanced measurement to be achieved. Different realizations are presented and discussed. These Fluxmeters are suitable for use in heat-transfer studies.
Hayriye Gidik - One of the best experts on this subject based on the ideXlab platform.
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Development of a radiative heat Fluxmeter with a textile substrate
Sensors and Actuators A: Physical, 2018Co-Authors: Hayriye Gidik, Daniel Dupont, Gauthier BedekAbstract:Abstract This study presents the development of a textile radiative heat Fluxmeter (TRHF) which was designed by weaving technology. The first part of this work focuses on a textile heat Fluxmeter (THF) which was developed with the principle of a gradient heat Fluxmeter. In order to transform this THF to a TRHF, a polymer with different graphite concentrations was applied on one of the faces of the THF by using coating technology. In applying graphite, the incident electromagnetic radiation absorption can be increased. Thus, the second part presents the principle and the specific design of the TRHF. Since the previous work gave satisfactory results for polyester/cotton (70/30 PES/CO) material and satin 5 weaving structure, PES/CO/Sa was used as textile substrate for the radiative heat Fluxmeter [ 1 ] (Keiser, 2007). Five different graphite concentrations, i.e. 5%, 10%, 20%, 30%, and 40%, were compared for electromagnetic radiation absorbency in order to identify the most appropriate ones to produce the TRHF. Two of these concentrations were chosen, i.e. 20% and 30%, due to their higher absorbency. Thus, three THFs with different graphite concentrations, i.e. 0%, 20%, 30%, were developed and their performances were compared with a reference radiative heat Fluxmeter for sensitivity. The TRHF with 30% of graphite has higher performance than the other THFs and its sensitivity is slightly higher than the reference one.
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Developing thermophysical sensors with textile auxiliary wall
Smart Textiles and their Applications, 2016Co-Authors: Hayriye Gidik, Gauthier Bedek, Daniel DupontAbstract:Abstract The existing heat Fluxmeters are rigid and prevent mass transfers since they are nonporous, which results in inaccurate data. By the integration of electroconductor wire (monoconductor or biconductor), a textile heat Fluxmeter was developed by a weaving process; through its porous structure this heat Fluxmeter allows transfer of moisture. In this study, textile auxiliary wall parameters were studied in order to identify the most appropriate ones to produce a textile heat Fluxmeter. Due to their insulating properties and particular fabric pattern, PES/CO fabric with twill and satin structures, and PES fabric with a satin structure, are the preferred fabrics for textile auxiliary walls. The woven textile heat Fluxmeter production process, which is based on thermoelectrical effect, ie, the Seebeck effect, and the test methods were described. Six textile heat Fluxmeters were produced with three different textile auxiliary walls and two different sizes. Their heat flux performances were compared with a commercial reference heat Fluxmeter. Results show that under steady state the textile heat Fluxmeters demonstrate the same trend and sensitivity as their commercial counterparts in dry conditions. Due to its higher sensitivity, the PES/CO heat Fluxmeter with a satin structure was chosen from the three textile heat Fluxmeters for physiological applications. Finally, the influence of humidity on heat transfer properties of textile heat Fluxmeters was analyzed.
Gauthier Bedek - One of the best experts on this subject based on the ideXlab platform.
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Development of a radiative heat Fluxmeter with a textile substrate
Sensors and Actuators A: Physical, 2018Co-Authors: Hayriye Gidik, Daniel Dupont, Gauthier BedekAbstract:Abstract This study presents the development of a textile radiative heat Fluxmeter (TRHF) which was designed by weaving technology. The first part of this work focuses on a textile heat Fluxmeter (THF) which was developed with the principle of a gradient heat Fluxmeter. In order to transform this THF to a TRHF, a polymer with different graphite concentrations was applied on one of the faces of the THF by using coating technology. In applying graphite, the incident electromagnetic radiation absorption can be increased. Thus, the second part presents the principle and the specific design of the TRHF. Since the previous work gave satisfactory results for polyester/cotton (70/30 PES/CO) material and satin 5 weaving structure, PES/CO/Sa was used as textile substrate for the radiative heat Fluxmeter [ 1 ] (Keiser, 2007). Five different graphite concentrations, i.e. 5%, 10%, 20%, 30%, and 40%, were compared for electromagnetic radiation absorbency in order to identify the most appropriate ones to produce the TRHF. Two of these concentrations were chosen, i.e. 20% and 30%, due to their higher absorbency. Thus, three THFs with different graphite concentrations, i.e. 0%, 20%, 30%, were developed and their performances were compared with a reference radiative heat Fluxmeter for sensitivity. The TRHF with 30% of graphite has higher performance than the other THFs and its sensitivity is slightly higher than the reference one.
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Developing thermophysical sensors with textile auxiliary wall
Smart Textiles and their Applications, 2016Co-Authors: Hayriye Gidik, Gauthier Bedek, Daniel DupontAbstract:Abstract The existing heat Fluxmeters are rigid and prevent mass transfers since they are nonporous, which results in inaccurate data. By the integration of electroconductor wire (monoconductor or biconductor), a textile heat Fluxmeter was developed by a weaving process; through its porous structure this heat Fluxmeter allows transfer of moisture. In this study, textile auxiliary wall parameters were studied in order to identify the most appropriate ones to produce a textile heat Fluxmeter. Due to their insulating properties and particular fabric pattern, PES/CO fabric with twill and satin structures, and PES fabric with a satin structure, are the preferred fabrics for textile auxiliary walls. The woven textile heat Fluxmeter production process, which is based on thermoelectrical effect, ie, the Seebeck effect, and the test methods were described. Six textile heat Fluxmeters were produced with three different textile auxiliary walls and two different sizes. Their heat flux performances were compared with a commercial reference heat Fluxmeter. Results show that under steady state the textile heat Fluxmeters demonstrate the same trend and sensitivity as their commercial counterparts in dry conditions. Due to its higher sensitivity, the PES/CO heat Fluxmeter with a satin structure was chosen from the three textile heat Fluxmeters for physiological applications. Finally, the influence of humidity on heat transfer properties of textile heat Fluxmeters was analyzed.
Daniel Dupont - One of the best experts on this subject based on the ideXlab platform.
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Development of a radiative heat Fluxmeter with a textile substrate
Sensors and Actuators A: Physical, 2018Co-Authors: Hayriye Gidik, Daniel Dupont, Gauthier BedekAbstract:Abstract This study presents the development of a textile radiative heat Fluxmeter (TRHF) which was designed by weaving technology. The first part of this work focuses on a textile heat Fluxmeter (THF) which was developed with the principle of a gradient heat Fluxmeter. In order to transform this THF to a TRHF, a polymer with different graphite concentrations was applied on one of the faces of the THF by using coating technology. In applying graphite, the incident electromagnetic radiation absorption can be increased. Thus, the second part presents the principle and the specific design of the TRHF. Since the previous work gave satisfactory results for polyester/cotton (70/30 PES/CO) material and satin 5 weaving structure, PES/CO/Sa was used as textile substrate for the radiative heat Fluxmeter [ 1 ] (Keiser, 2007). Five different graphite concentrations, i.e. 5%, 10%, 20%, 30%, and 40%, were compared for electromagnetic radiation absorbency in order to identify the most appropriate ones to produce the TRHF. Two of these concentrations were chosen, i.e. 20% and 30%, due to their higher absorbency. Thus, three THFs with different graphite concentrations, i.e. 0%, 20%, 30%, were developed and their performances were compared with a reference radiative heat Fluxmeter for sensitivity. The TRHF with 30% of graphite has higher performance than the other THFs and its sensitivity is slightly higher than the reference one.
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Developing thermophysical sensors with textile auxiliary wall
Smart Textiles and their Applications, 2016Co-Authors: Hayriye Gidik, Gauthier Bedek, Daniel DupontAbstract:Abstract The existing heat Fluxmeters are rigid and prevent mass transfers since they are nonporous, which results in inaccurate data. By the integration of electroconductor wire (monoconductor or biconductor), a textile heat Fluxmeter was developed by a weaving process; through its porous structure this heat Fluxmeter allows transfer of moisture. In this study, textile auxiliary wall parameters were studied in order to identify the most appropriate ones to produce a textile heat Fluxmeter. Due to their insulating properties and particular fabric pattern, PES/CO fabric with twill and satin structures, and PES fabric with a satin structure, are the preferred fabrics for textile auxiliary walls. The woven textile heat Fluxmeter production process, which is based on thermoelectrical effect, ie, the Seebeck effect, and the test methods were described. Six textile heat Fluxmeters were produced with three different textile auxiliary walls and two different sizes. Their heat flux performances were compared with a commercial reference heat Fluxmeter. Results show that under steady state the textile heat Fluxmeters demonstrate the same trend and sensitivity as their commercial counterparts in dry conditions. Due to its higher sensitivity, the PES/CO heat Fluxmeter with a satin structure was chosen from the three textile heat Fluxmeters for physiological applications. Finally, the influence of humidity on heat transfer properties of textile heat Fluxmeters was analyzed.
Anton Urban - One of the best experts on this subject based on the ideXlab platform.
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superconductive quantum Fluxmeter superconductive quantum magnetometer with external feedback
Cryogenics, 1997Co-Authors: V. Zrubec, Anton UrbanAbstract:Abstract In this article transfer and noise parameters of superconductive quantum magnetometers with external feedback functioning as superconductive quantum Fluxmeters (SQFs) are analysed. From the derived relationships it follows that they are capable of measuring magnetic flux acting on superconductive coils with unknown geometrical structure, and unknown inductance and size parameters. The data on high input impedance of Fluxmeters of this type are specified. Relationships are derived referring to the connection between inductive 〈typically 〈0.1 ÷ 10〉H〉 or resistive 〈 ~ 〈0.1 ÷ 100〈) Ω〉 nature of the input impedance of electronic unit (EU) SQFs and transfer parameters of their complete feedback loop. Simple methods permitting utilization of SQFs for the measurement of inductance of superconductive coils in situ in cryogenic environments in the range ~ 〈10 −9 ÷ 10 −1 〉 H are presented.
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Superconductive quantum Fluxmeter—superconductive quantum magnetometer with external feedback
Cryogenics, 1997Co-Authors: V. Zrubec, Anton UrbanAbstract:Abstract In this article transfer and noise parameters of superconductive quantum magnetometers with external feedback functioning as superconductive quantum Fluxmeters (SQFs) are analysed. From the derived relationships it follows that they are capable of measuring magnetic flux acting on superconductive coils with unknown geometrical structure, and unknown inductance and size parameters. The data on high input impedance of Fluxmeters of this type are specified. Relationships are derived referring to the connection between inductive 〈typically 〈0.1 ÷ 10〉H〉 or resistive 〈 ~ 〈0.1 ÷ 100〈) Ω〉 nature of the input impedance of electronic unit (EU) SQFs and transfer parameters of their complete feedback loop. Simple methods permitting utilization of SQFs for the measurement of inductance of superconductive coils in situ in cryogenic environments in the range ~ 〈10 −9 ÷ 10 −1 〉 H are presented.