Uncertainty evaluation of measurement value of ultrasonic Flaw Detector verification device

The ultrasonic flaw Detector verification device will use high-frequency pulse modulation signals and standard attenuators to measure the measurement performance of the ultrasonic flaw Detector, and use standard probes and standard test blocks to test the performance of the ultrasonic flaw detection system of the ultrasonic flaw Detector. Li Anxiang's paper "Evaluation of Uncertainty of Measurement Value of Ultrasonic Flaw Detector Verification Device" mainly evaluates the measurement uncertainty of ultrasonic flaw Detector verification device according to JJG746-2004 "Ultrasonic Flaw Detector" verification regulations, mainly for vertical linearity Assessment of measurement uncertainty.

Verification conditions and process

Reporting and expression of measurement uncertainty

The expanded uncertainty of the measured vertical linearity error of the ultrasonic flaw Detector is U=1.84% k=2.

in conclusion

In addition to the vertical linearity error, the ultrasonic flaw Detector verification device also has horizontal linearity error, attenuation error, etc. This paper focuses on the uncertainty of vertical linearity error.