Diagnostic device, computer program, and diagnostic system

A diagnostic system comprising:

• a diagnostic device;
• and
• a process machine, having at least one sensor that measures at least one of acoustic data, acceleration data, or an acoustic emission, as sensing information, on which the diagnostic device performs diagnosis, wherein
• the diagnostic device includes
• a receiver configured to receive sensing information, from the at least one sensor of the process machine, and context information, the sensing information being information on a physical quantity that varies in accordance with an operation by the process machine, the context information including at least one of rotating speed, number of rotations and moving information of the process machine indicating a drive unit of the process machine is driving, the drive unit is included in the process machine;
• and
• at least one processor configured to
• monitor the context information;
• specify an actual machining period based on both of the context information and the sensing information, the actual machining period being a period during which an amplitude of the sensing information changes to exceed a threshold set in advance and the amplitude of the sensing information falls below the threshold, the period being a period that a tool of the process machine is machining a workpiece, the tool is driven by the drive unit,
• determine an abnormal state of the tool using a part of the sensing information, the part being corresponding to the specified actual machining period, and
• update a model stored in a memory based on the determined abnormal state;
• the process machine including:
• the at least one sensor configured to detect the physical quantity, and
• a transmitter configured to transmit the detected physical quantity to the diagnostic device.