Method of ultrasonic for measuring tension in a material by the deviation of the angle of refraction of waves with oblique incidence

摘要

"The process and the system voltage measuring by ultrasound through the refraction of waves with oblique incidence. Characterized by using the variation of the angle of refraction, caused by variation of tension acting on the object, ultra sonic waves of oblique incidence, both longitudinal and cisalhantes.It was derived from a method of stress measurement by ultrasound, based on the variation of the angle of refraction caused by variation of tension. It was defined a parameter 30 related to the angle of refraction and the points of incidence and outgoing of ultrasonic wave, having obtained a The equation that relates to voltage.The method allows to obtain nominal values of tension in an object from the measurement of 30 reference the same object free of tension. Both ultra sonic waves of longitudinal and transverse can be used, it is not necessary to have access to the two sides (internal and external) of the object, as well as to measure the thickness of the object or the speed of propagation of the ultrasonic wave.