Infrared pyrometer for temperature measurement of objects, emissivity of which depends on wavelength and time

Bielecki, Z.; Chrzanowski, Krzysztof; Matyszkiel, Robert; Piqtkowski, T.; Szulim, Marek

doi:10.21611/qirt.1998.050

Cited by 9 publications

(16 citation statements)

References 6 publications

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“…area of measurement, was forced by the maximum data transfer rate in "Fast Speed" mode that can be reached for the applied camera. Due to the high dynamics of the signal, measurements were carried out in the measuring range 200°C÷600°C [18,20]. Thus, in the initial phase of test, in the absence of friction, and at the very end of the brake cooling, data from infrared camera were not available.…”

Section: Fig 2 Additional Thermal Imaging System: Block Diagram Durmentioning

confidence: 99%

Thermographics measurements and numerical simulation of a car breaks

Kastek¹,

Piatkowski²,

Polakowski³

et al. 2012

Proceedings of the 2012 International Conference on Quantitative InfraRed Thermography

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This paper presents the test campaign concept and definition and the analysis of the recorded measurements. The braking temperature on a lining surface can rise above 500°C. Experimental tests were conducted on the test machine called IL-68, modified to enable thermographic measurements. The paper presents the results of analysis of thermal images registered at different conditions during the tests as well as results of dynamic tests and calculated thermal parameters characterizing the brake. Furthermore, based on this testing machine, and tests results the numerical model was developed. Computations were performed using a dynamic LS-Dyna code where heat generation was estimated assuming full (100%) conversion of mechanical work done by friction forces.

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Section: Fig 2 Additional Thermal Imaging System: Block Diagram Durmentioning

confidence: 99%

Thermographics measurements and numerical simulation of a car breaks

Kastek¹,

Piatkowski²,

Polakowski³

et al. 2012

Proceedings of the 2012 International Conference on Quantitative InfraRed Thermography

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“…From all these parameters the greatest influence on measurement accuracy has the emissivity coefficient [10]. In order to eliminate the impact of changes in emissivity factor when measuring an object or uncertainty in estimation of the real value of emissivity, various techniques are used [11,12]. Using the SC7900VL camera there, it is possible to define and introduce the emissivity map before or after the measurement, making the measurement independent from its effect on the accuracy of the temperature distribution.…”

Section: Measurement Standmentioning

confidence: 99%

Measurement of Thermal Behavior of Detector Array Surface with the Use of Microscopic Thermal Camera

Bieszczad¹,

Kastek²

2011

Metrology and Measurement Systems

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Modern infrared cameras are constructed with two main types of infrared detectors: photon detectors and thermal detectors. Because of economic reasons, vast numbers of modern thermal cameras are constructed with the use of infrared microbolometric detectors which belong to the group of thermal detectors. Thermal detectors detect incident infrared radiation by measuring changes of temperature on the surface of a special micro-bridge structure. Thermal detectors, like microbolometric detectors on one hand should be sensitive to changing temperature to accurately measure incoming infrared radiation from the observed scene, on the other hand there are many other phenomena that change the temperature of the detector and influence the overall response of the detector. In order to construct an accurate infrared camera, there is a need to evaluate these phenomena and quantify their influence. In the article the phenomenon of self heating due to the operation of the readout circuit is analyzed on an UL 03 19 1 detector. The theoretical analysis is compared with the results of conducted measurements. Measurements with a type SC7900VL thermographic camera were performed to measure the thermodynamic behavior of the UL 03 19 1 detector array.

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“…The influence of emissivity coefficient on measurement results can also be compensated by adopting several methods from pyrometer non-contact temperature measurements. There are many known methods [13][14][15][16] for such compensation and an algorithm taking into account real emissivity values should be included in automatic gas detection procedures.…”

Section: Ifts Fovmentioning

confidence: 99%

Infrared Imaging Fourier Transform Spectrometer as the Stand-Off Gas Detection System

Kastek

Piątkowski²,

Trzaskawka³

2011

Metrology and Measurement Systems

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The article presents the detection of gases using an infrared imaging Fourier-transform spectrometer (IFTS). The Telops company has developed the IFTS instrument HyperCam, which is offered as a short-or long-wave infrared device. The principle of HyperCam operation and methodology of gas detection has been shown in the paper, as well as theoretical evaluation of gas detection possibility. Calculations of the optical path between the IFTS device, cloud of gases and background have been also discussed. The variation of a signal reaching the IFTS caused by the presence of a gas has been calculated and compared with the reference signal obtained without the presence of a gas in IFTS's field of view. Verification of the theoretical result has been made by laboratory measurements. Some results of the detection of various types of gases has been also included in the paper.

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Infrared pyrometer for temperature measurement of objects, emissivity of which depends on wavelength and time

Cited by 9 publications

References 6 publications

Thermographics measurements and numerical simulation of a car breaks

Thermographics measurements and numerical simulation of a car breaks

Measurement of Thermal Behavior of Detector Array Surface with the Use of Microscopic Thermal Camera

Infrared Imaging Fourier Transform Spectrometer as the Stand-Off Gas Detection System

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