Metrology Aspects of Measuring are in the Tasks of Thermal Tomography

Метрологія та прилади

关键词: thermal tomography, theory of complexity, turbine blades, uncertainty of measurements, quality of cooling;   

DOI  :  

来源: DOAJ

【 摘 要 】

The approach based on an algebraic information theory allows to generalize such fundamental concepts of theory of measuring, as conformity to law and chance, and формализовать them. The conformities to law, educed in the results of direct supervisions, reflect objective properties of the looked after object, and casual part of description of these results characterizes their degree of vagueness. Measured values are secondary results of solving inverse ill-posed problem in thermal imaging problems. Uncertainty of measurement errors associated with both thermal data representation format, and with the features of the reconstruction algorithm. A new method for estimating the uncertainty of measurement based on the principle of minimizing the «complexity» of the primary data. It is shown that the correct calculation of a priori information about the properties of the reconstructed structure and the parameters of the measuring equipment give a minimum estimate of the uncertainty. In some cases, uncertainty is several times less than with conventional methods of the thermal tomography. The generally accepted parameters of evalua­ting the quality of cooling turbine blades are mis­sing. A wide range of sizes and theirs cooling mecha­nisms significantly complicate the use of such para­meters as absolute values. We propose to use a universal relative parameter. It corresponds to the virtual heat transfer coefficient at a predetermined depth of the metal layer. It illustrates the possible use of this parameter for various methods of thermal control. An integrated approach to the construction of the control system and the integration of different modes of cooling can significantly reduce the uncertainty of the quality of the cooling parameter. He is a local and could eventually be used to evaluate the residual life of the blade.

【 授权许可】

Unknown