Abnormality determination method, abnormality determination apparatus, abnormality determination system, and non-transitory computer-readable medium

A non-transitory computer-readable medium storing an abnormality determination program for causing a computer to execute processing of:

• setting a first area for an optical fiber sensor to detect an abnormality;
• setting a second area in which detection of the abnormality is invalidated when the abnormality is detected in the first area, the second area being an area surrounded by detection positions of sounds of a preset frequency emitted by a plurality of speakers disposed inside the first area;
• setting an invalid time period in which detection of the abnormality is invalidated when the abnormality is detected in the first area;
• and
• determining, when the abnormality is detected in the first area, that no abnormality has occurred in the first area in a case where a position where the abnormality is detected is inside the second area and a time when the abnormality is detected is within the invalid time period.

An abnormality determination apparatus comprising:

• at least one memory for storing instructions;
• and
• at least one processor configured to execute the instructions to:
• acquire state information of an inside of a first area detected by an optical fiber sensor;
• acquire map information of the first area;
• acquire current time information;
• acquire information indicating a second area in which detection of an abnormality is invalidated when the abnormality is detected in the first area and information indicating an invalid time period in which detection of the abnormality is invalidated when the abnormality is detected in the first area;
• determine whether or not the abnormality has occurred in the first area based on state information of the inside of the first area;
• and
• determine, when the abnormality is detected in the first area, that no abnormality has occurred in the first area in a case where a position where the abnormality is detected is inside the second area and a time when the abnormality is detected is within the invalid time period, wherein
• the second area is a preset area surrounding a moving object moving inside the first area in a case where a detection position of a sound of a preset first frequency emitted by a first speaker provided in the moving object coincides with a detection position of a moving sound of the moving object.