Data processing device, data processing system, data processing method, and storage medium

A data processing system, comprising:

• a welding device configured to make a joined body by joining a plurality of parts;
• an inspection device configured to perform a probing process using a detector and generating inspection data, the detector including a plurality of detection elements arranged along a first direction and a second direction crossing the first direction, in the probing process, each of the plurality of detection elements transmitting an ultrasonic wave toward a weld portion of the joined body along a third direction and detecting a reflected wave to obtain intensity data, the third direction crossing a first plane that is parallel to the first direction and the second direction, the inspection device being configured to perform
• detecting the weld portion from intensity data by determining whether or not each of a plurality of points is in the first plane,
• calculating a center position of the weld portion and an angle between the weld portion and the first plane, the angle being obtained by calculating three-dimensional intensity gradients of the reflected wave based on the intensity data and averaging the three-dimensional intensity gradients, and
• generating inspection data including position data including the center position and angle data including the angle;
• a data processing device configured to
• receive a plurality of sets of welding device data from the welding device, each of the plurality of sets of welding device data including a welding device ID for identifying the welding device,
• receive a plurality of sets of the inspection data,
• associate the plurality of sets of inspection data with the plurality of sets of welding device data, respectively;
• and
• an output device, the data processing device configured to
• cause the output device to display a user interface showing a change of a plurality of the positions with respect to time or a change of a plurality of the angles with respect to time,
• accept a selection of one of the times through the user interface, and
• cause the output device to display one of the plurality of sets of inspection data obtained at the selected time.