ECHOSCOPIC METHOD FOR ULTRASONIC QUALITY CONTROL OF THE PRODUCT ACROSS THE ENTIRE SECTION Russian patent published in 2012 - IPC G01N29/04 

FIELD: ultrasonic quality control.

SUBSTANCE: multiple piezoelectric transducers are installed on the surface of the tested product, these transducers alternate between coupled and separate modes of ultrasonic oscillations transmitting and receiving after finishing the ultrasonic oscillation cycles with various acceptance angles ranging from 0 to 90 degrees, the angular orientation of the piezoelectric plates along the longitudinal axis of the tested product ranges from 0 to 90 degrees. All transducers are moved along the longitudinal axis of the tested product and the echo signals reflected from standard and non-standard reflectors (defects) are detected across the whole section of the tested product by the piezoelectric plates with various echo signal acceptance angles ranging from 0 to 90 and with angular orientation of a piezoelectric plate in relation to the longitudinal section of the tested product ranging from 0 to 90. The plates also alternate between coupled and separate modes of ultrasonic oscillations transmitting and receiving after finishing the ultrasonic oscillation cycles regardless of the oscillations position and distance from the piezoelectric plate which transmits the ultrasonic oscillations. Afterwards the piezotronic plates working modes are alternated to detect the echo signal from any reflectors and all detected signals are united into one united information field. Furthermore, the piezoelectric transducers work in cyclic mode of ultrasonic oscillations and after the cycle is finished they alternate between coupled and separate modes of ultrasonic oscillations transmitting and receiving, but in respect to the rule “one transmits, many receive”.

EFFECT: increased control accuracy and reliability.

2 cl, 1 tbl, 15 dwg