Ultrasonic testing method, system, program, and storage medium

An ultrasonic testing method comprising:

• providing:
• i) a phased array ultrasonic testing device, ii) a switch connected to the phased array ultrasonic testing device, iii) an array sensor installed on an object under inspection, the array sensor including a plurality of ultrasonic elements, and iv) a controller configured to control the phased array ultrasonic device and the switch;
• dividing the array sensor including a plurality of ultrasonic elements into a plurality of regions;
• connecting the phased array ultrasonic testing device to each region of the array sensor via the switch;
• selecting at least one region of the array sensor used for an ultrasonic testing from the plurality of regions for each flaw detection point according to a positional relation of the flaw detection point to the array sensor by the controller;
• connecting the phased array ultrasonic testing device to the selected at least one region of the array sensor by controlling the switch with the controller;
• for a flaw detection point for which one region is selected, performing the ultrasonic testing by using only the selected one region by controlling the phased array ultrasonic testing device and the switch with the controller;
• and
• for a flaw detection point for which a plurality of regions are selected, performing the necessary number of times of ultrasonic testing according to a number of the regions by using only the selected plurality of regions, and adding strength signals of received reflected waves, by controlling the phased array ultrasonic testing device and the switch with the controller.