Diagnostic apparatus, diagnostic method, and diagnostic program

A diagnostic method of a diagnostic apparatus, the method comprising:

• acquiring sensor values from sensors on the device;
• determining, a plurality of reference times of operation states at which the device is known to be normal or abnormal;
• repeating a process of storing the sensor values acquired from the device while changing the operation states at the different reference times in a storage unit in association with each of the determined operation states until there is no non-corresponding operation state with which the acquired sensor value is not yet associated, by a reference data creation unit of the diagnostic apparatus;
• acquiring, at a diagnosis time at which it is not known whether the device is normal or abnormal, an operation state and a sensor value of the device at the time, by a diagnostic data creation unit of the diagnostic apparatus;
• and
• reading the sensor value associated with the acquired operation state from the storage unit and comparing the sensor value acquired at the diagnosis time with the read sensor value to display a result of determination on whether the device is normal or abnormal, by a diagnosis unit of the diagnostic apparatus.

A non-transitory computer readable medium storing a diagnostic program configured to cause a diagnostic apparatus to function, the program comprising steps of:

• acquiring sensor values from sensors on the device;
• determining a plurality of references times of operation states at which the device is known to be normal or abnormal;
• repeating a process of storing the sensor values acquired from the device while changing the operation states at the different reference times in a storage unit in association with each of the determined operation states until there is no non-corresponding operation state with which the acquired sensor value is not yet associated;
• a diagnostic data creation unit of the diagnostic apparatus to execute a process of acquiring, at a diagnosis time at which it is not known whether the device is normal or abnormal, an operation state and a sensor value of the device at the time;
• and
• a diagnosis unit of the diagnostic apparatus to execute a process of reading the sensor value associated with the acquired operation state from the storage unit and comparing the sensor value acquired at the diagnosis time with the read sensor value to display a result of determination on whether the device is normal or abnormal.