Welding control using ultrasonic multi-elements method

Ultrasonic multi-elements is a safe and non-destructive inspection method. it is intensively used in industrial applications to search for hidden indications such as cracks,voids,porosity and other internal discontinuities in different materials. such method is accompanied with an easy-to-use operating system. indeed,when a sound wave strikes an object,it bounces back,or echoes. by measuring these echo waves,it is possible to determine the remoteness,the size,the shape and the consistency of any object. the ultrasonic multi-elements method is based on the use of transducer decomposed into individual elements that can be controlled independently. thus,compared to the single-element technology,the phased array transducer allows a faster object scanning,an electronic focusing of the beam and a deflection for transmitting a beam in a plurality of incidence angle. in this task,the ultrasonic phased arrays are used to control the welding quality. this method has proven to be very appropriate technique for weld inspections. it can be applied to almost any weld profile and predicted defects. besides showing the normal advantages of phased arrays for welds (high speed,reduced costs,full data storage and increased productivity). © 2017 university of mohammed premier oujda morocco.