New possibilities of increasing accuracy for nondestructive testing (Basic principles and appHcation examples

A new method for increasing accuracy of nondestructive testing techniques. particularly electromagnetic (eddy current), thermal, electrical, capacitance. etc .• is proposed. The method, calleda testing methodology by calibrated disturbing factors, is based on recording ,)f a measuring instrument's response to the introduction of calibrated disturbing excitations in the active testing area. Analysis of the recorded response provides the possibility to calculate com.-ctiuns lor measurementresults, to suppl~nt data processing algorithms with corrective actions and to idenrity sources ofmeasurement uncertainties. In comparison with conventional calibration techniques. the proposed method is based on calibration of disturbing influences in a range available lor the calibration experiment with necessary accuracy and transformation of calibration n. Sults to the range of realtesting conditions not directly accessible. Several data processing algorithms are proposed for calculation of measurement corrections. This particular paper has an introductory character and is devoted to explanation of basic principles of the proposed testing methodology.

کلیدواژه ها:

Measurement uncertainty ، Disturbing !actor ، Calibration