Improvements in data reduction in direct pulse heating calorimetry
Apstrakt
This paper describes improvements introduced in data reduction in direct heating pulse specific heat experiments. In calculations of specific heal, it is necessary to calculate the first derivative of the recorded temperature data as a function of time. The error induced by different numerical differentiation techniques can represent a significant part of the overall measurement error. Thus, different digital filtering techniques, differentiation, and smoothing algorithms were applied and tested to examine their influence on the minimization of errors induced by noise, which is unavoidable in measured signals. A minimum square error criterion was applied in designing digital filters, with arbitrary prescribed magnitude characteristics. Attention was paid to applications when one or more structural phase transitions in the specimen material occur within the temperature range covered by the experiment. The cases where the frequency spectrum of induced noise overlaps with the spectrum of ...temperature transient signals originating from phase transitions were analyzed in detail. The effectiveness of the methods of extracting the final specific heat data from a noisy signal using different digital filtering techniques is demonstrated.
Ključne reči:
data reduction / digital filters / hemispherical total emittance / noise filtering / pulse calorimetry / phase transitions / specific heatIzvor:
International Journal of Thermophysics, 1996, 17, 5, 1057-1067Napomena:
- 4th Workshop on Subsecond Thermophysics, Jun 27-29, 1996, Deut Forschungsanstalt Luftfahrt and Raumfahrt, Cologne, Germany
DOI: 10.1007/BF01441994
ISSN: 0195-928X
WoS: A1996VG26400008
Scopus: 2-s2.0-0030241450
Kolekcije
Institucija/grupa
VinčaTY - JOUR AU - Vukovic, GS AU - Perovic, NL AU - Maglic, KD PY - 1996 UR - https://vinar.vin.bg.ac.rs/handle/123456789/7221 AB - This paper describes improvements introduced in data reduction in direct heating pulse specific heat experiments. In calculations of specific heal, it is necessary to calculate the first derivative of the recorded temperature data as a function of time. The error induced by different numerical differentiation techniques can represent a significant part of the overall measurement error. Thus, different digital filtering techniques, differentiation, and smoothing algorithms were applied and tested to examine their influence on the minimization of errors induced by noise, which is unavoidable in measured signals. A minimum square error criterion was applied in designing digital filters, with arbitrary prescribed magnitude characteristics. Attention was paid to applications when one or more structural phase transitions in the specimen material occur within the temperature range covered by the experiment. The cases where the frequency spectrum of induced noise overlaps with the spectrum of temperature transient signals originating from phase transitions were analyzed in detail. The effectiveness of the methods of extracting the final specific heat data from a noisy signal using different digital filtering techniques is demonstrated. T2 - International Journal of Thermophysics T1 - Improvements in data reduction in direct pulse heating calorimetry VL - 17 IS - 5 SP - 1057 EP - 1067 DO - 10.1007/BF01441994 ER -
@article{ author = "Vukovic, GS and Perovic, NL and Maglic, KD", year = "1996", abstract = "This paper describes improvements introduced in data reduction in direct heating pulse specific heat experiments. In calculations of specific heal, it is necessary to calculate the first derivative of the recorded temperature data as a function of time. The error induced by different numerical differentiation techniques can represent a significant part of the overall measurement error. Thus, different digital filtering techniques, differentiation, and smoothing algorithms were applied and tested to examine their influence on the minimization of errors induced by noise, which is unavoidable in measured signals. A minimum square error criterion was applied in designing digital filters, with arbitrary prescribed magnitude characteristics. Attention was paid to applications when one or more structural phase transitions in the specimen material occur within the temperature range covered by the experiment. The cases where the frequency spectrum of induced noise overlaps with the spectrum of temperature transient signals originating from phase transitions were analyzed in detail. The effectiveness of the methods of extracting the final specific heat data from a noisy signal using different digital filtering techniques is demonstrated.", journal = "International Journal of Thermophysics", title = "Improvements in data reduction in direct pulse heating calorimetry", volume = "17", number = "5", pages = "1057-1067", doi = "10.1007/BF01441994" }
Vukovic, G., Perovic, N.,& Maglic, K.. (1996). Improvements in data reduction in direct pulse heating calorimetry. in International Journal of Thermophysics, 17(5), 1057-1067. https://doi.org/10.1007/BF01441994
Vukovic G, Perovic N, Maglic K. Improvements in data reduction in direct pulse heating calorimetry. in International Journal of Thermophysics. 1996;17(5):1057-1067. doi:10.1007/BF01441994 .
Vukovic, GS, Perovic, NL, Maglic, KD, "Improvements in data reduction in direct pulse heating calorimetry" in International Journal of Thermophysics, 17, no. 5 (1996):1057-1067, https://doi.org/10.1007/BF01441994 . .