METHOD FOR ULTRASONIC INSPECTION OF ITEMS Russian patent published in 2014 - IPC G01N29/04 

FIELD: measurement equipment.

SUBSTANCE: ultrasonic vibrations are send to an item, through transmission of the item by ultrasonic vibration pulses is performed and a receiving transducer receives the ultrasonic vibrations in the air passed through the item crown; the difference is that the ultrasonic inspection of the item is carried out by two (instead of one) ultrasonic devices or two units of one device with one of them being used to generate and send the ultrasonic vibrations to the item and the other - to receive the ultrasonic vibrations passed through the item crown and to show them on the device monitor. Performance of the units of each device is not synchronised with each other, in particular, pulse repetition frequency of ultrasonic vibrations at the device generation unit is set as not equal but exceeding the pulse repetition frequency synchronising the performance of the receiving device units, including the time base unit providing for displaying the received ultrasonic vibrations on the device monitor, and the latter frequency shall not be multiple of the syncpulse repetition frequency. Quality of the item is assessed by the availability and amplitude of the pulses moving on the pulse device monitor according to the specified ratio.

EFFECT: quality and reliability of ultrasonic inspection for different items.