A Summary of Heat-Flux Sensor Calibration Data PDF Download
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Author:
Publisher: DIANE Publishing
ISBN: 9781422328132
Category :
Languages : en
Pages : 4
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Book Description
Author:
Publisher: DIANE Publishing
ISBN: 9781422328132
Category :
Languages : en
Pages : 4
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Book Description
Author: DM. Apthorp
Publisher:
ISBN:
Category : Buildings
Languages : en
Pages : 20
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Book Description
A new heat flux sensor calibration technique has been developed that is traceable to the National Bureau of Standards. It can be used to calibrate sensors at the temperature and heat flux levels typically found in the field, without requiring any expensive equipment or special experimental techniques. Sixty-four sensors have been calibrated with a mean precision of 2.2%. Three sensors were independently calibrated by Dynatech, and their calibration factors were all within 2% of the Massachusetts Institute of Technology (MIT) values, whereas the manufacturer's calibration factors ranged from 99 to 151% of the respective MIT values and so are effectively useless. There is evidence that the thermal conductivity of a sensor may vary by as much as a factor of two from sensor to sensor, and therefore a technique for measuring this is discussed.
Author: George E. Courville
Publisher: ASTM International
ISBN: 9780803104389
Category : Technology & Engineering
Languages : en
Pages : 272
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Author: S. Stefanescu
Publisher:
ISBN:
Category :
Languages : en
Pages : 18
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Book Description
Steady-state and frequency response calibration of a microfabricated heat-flux sensor have been completed. This sensor is batch fabricated using standard, micromachining techniques, allowing both miniaturization and the ability to create arrays of sensors and their corresponding interconnects. Both high-frequency and spatial response is desired, so the sensors are both thin and of small cross-sectional area. Thin-film, temperature-sensitive resistors are used as the active gauge elements. Two sensor configurations are investigated: (1) a Wheatstone-bridge using four resistors; and (2) a simple, two-resistor design. In each design, one resistor (or pair) is covered by a thin layer (5000 A) thermal barrier; the other resistor (or pair) is covered by a thick (5 microns) thermal barrier. The active area of a single resistor is 360 microns by 360 microns; the total gauge area is 1.5 mm square. The resistors are made of 2000 A-thick metal; and the entire gauge is fabricated on a 25 microns-thick flexible, polyimide substrate. Heat flux through the surface changes the temperature of the resistors and produces a corresponding change in resistance. Sensors were calibrated using two radiation heat sources: (1) a furnace for steady-state, and (2) a light and chopper for frequency response.
Author:
Publisher:
ISBN:
Category : Heat flux transducers
Languages : en
Pages : 0
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Author: K. D. Steckler
Publisher:
ISBN:
Category : Aircraft cabins
Languages : en
Pages : 40
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: Sorin Stefanescu
Publisher:
ISBN:
Category :
Languages : en
Pages : 116
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Author: A. V. Murthy
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: A. V. Murthy
Publisher:
ISBN:
Category :
Languages : en
Pages :
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