Determination device, determination method, and non-transitory computer-readable recording medium

A determination method comprising:

• generating a reference model of a sensor detection value;
• after generating the reference model, starting a measuring of a time duration at a predetermined point in time before detecting a deviation between the reference model and the sensor detection value exceeds a threshold and continuing the measuring of the time duration until the deviation between the reference model and the sensor detection value exceeds the threshold;
• determining the time duration measured in the measuring is shorter than a predetermined time duration;
• and
• outputting a signal associated with an abnormality when the time duration is determined to be shorter than the predetermined time duration.

A computer readable, non-transitory medium storing a program that causes a computer to execute a process, the process comprising:

• generating a reference model of a sensor detection value;
• after generating the reference model, starting a measuring a time duration at a predetermined point in time before detecting a deviation between the reference model and the sensor detection value exceeds a threshold and continuing the measuring of the time duration until the deviation between the reference model and the sensor detection value exceeds the threshold;
• determining whether the time duration measured in the measuring is shorter than a predetermined time duration;
• and
• outputting a signal associated with an abnormality when the time duration is determined to be shorter than the predetermined time duration.