SAFT - The synthetic aperture focusing algorithms of time domain( TD-SAFT ) and frequency domain ( FD-SAFT ) are used to enhance the quality of scan image.
The synthetic aperture focusing technology (SAFT) seems two meanings. First,
take ultrasonic inspections of many smaller pies-electric elements at ordered position as one single inspection of a larger ultrasonic transducer. On the second, take the
actual testing facts that each transducer element transmits and receives the echo signal
one by one as if they work synchronously. It is simple to obtain the testing signal,
using a wide oriented transducer element scan alone the line, record the testing signal
of every position. Take a group of signals of scan position as a phased array,
dynamically focused on the point you care. In other words to add the signal of each
element at the time of pulse arriving the receivers.