Soft Calibration Method to Uncertaintyof Measurement about Nondestructive Quantitative Testing

By the uncertainty, the common Nondestructive quantitative testing data could not meet the needs of the basic request of Nondestructive evaluation and reliability safety analysis in actual engineering. In this article, used the uncertainty evaluation method, the regress analysis and the fuzzy theory, the soft calibration method was built for uncertainty of measurement of nondestructive quantitative testing. Base on the same accuracy of Nondestructive testing instrument, the calculation and analysis results of some engineering example displayed that the random and systematic uncertainty of testing results was lessening clearly by the soft calibration method, the quality of results was raised clearly by overcoming some lacking of the common hard calibration. By the soft calibration method, the Nondestructive quantitative testing data was capable of meeting the needs of the basic request for Nondestructive evaluation and Reliability safety analysis.