Biomedical subjects

Xiao-fang Cheng

Publications and source records attributed to Xiao-fang Cheng.

3 recordsLinked to original sources

PubMed2005

[Theoretical analysis of wavelength choice in tri-wavelength method of temperature measurement].

In this paper, a non-dimensional emissivity model with universality is established. For the tri-wavelength method of temperature measurement, based on the non-dimensional emissivity, the applicable measurement condition and theoretical analysis of wavelength choice are mainly introduced. In the discussion of theoretical analysis of wavelength choice, by optimizing the analysis of measurement method and the concept of isothermal line induced by the measurement coordinates, two kinds of ideal choice rules of measurement wavelength are put forward, which will be necessary to the technology application of this tri-wavelength method. Meanwhile the optimizing idea is also applicable to multi-wavelength method of temperature measurement.

Algorithms↗

PubMed2005

[Optimization analysis based on wavelength bandwidth for multi-band pyrometry].

The present paper establishes the optimization criteria for achieving the optimum measurements in three-band pyrometry under the assumption of linear emissivity model and the sensor design with Gaussian distribution. By varying the FWHM of Gaussian distribution, the optimization analysis is investigated with the choice of the wavelength bandwidth in three-band pyrometry. For specific cases, the simulation results present the optimum bandwidth distribution. Therefore, the discussions in this paper will provide significant theoretical instructions for the design of radiation pyrometer.

English Abstract↗

PubMed2003

[Principles in the design of surface temperature measurement method via radiation approach].

The fundamental issues in the design of surface temperature measurement method via radiation approach are discussed in this article, such as the spectral and directional complicacy of thermal radiation, the optical design, and the electrocircuit design. A generalized equation for the analysis of temperature measurement method via radiation approach is proposed. The method of absolute value and relative value is compared. Calibration should be made in the absolute value method but not in the relative value method. The former method is not suitable for the measurement of temperature fields while the latter method is.

Calibration↗