The application of electronic signal-processing methods in ultrasonic thickness gauging of products with a complex structure

摘要

It is shown that when large products with a complex structure with a high integral attenuation of ultrasound are tested, it is expedient to use different electronic signal-processing methods (storage, normalization, and synchronous detection) that allow one to increase the thickness-measurement accuracy of vermicular cast iron products with complex structures and poor surfaces; when large polymer composite products with a high integral attenuation of ultrasonic signals are tested these methods allow one to not only increase the signal-to-noise ratio but the measurement accuracy of the bottom signal. It is possible to fully apply different electronic signal-processing methods if a multifunctional software-hardware measuring system that we designed is used, which is capable of selecting the optimum set of signal-processing methods for each new product.