Anomaly determination device, anomaly determination method, and memory medium

An anomaly determination method for a water pump, memory circuitry storing map data that defines a map, the anomaly determination method comprising:

• acquiring, by execution circuitry, an input variable to the map from image data obtained by capturing an outer surface of the water pump, the water pump forcibly delivering coolant from an internal combustion engine;
• executing, by the execution circuitry, a calculation process that outputs a value of an output variable of the map by inputting the input variable to the map, the output variable indicating whether the coolant has leaked out of the water pump;
• executing, by the execution circuitry, a provisional determination process that uses the output variable to obtain a provisional determination result indicating whether the coolant has leaked out of the water pump;
• and
• executing, by the execution circuitry, a determination finalizing process that uses the provisional determination result to obtain a final determination result indicating whether the coolant has leaked out of the water pump,
• the map is one of different maps that are defined by the map data,
• one or more of the maps have been learned through machine learning in advance,
• the provisional determination process is one of provisional determination processes,
• the provisional determination result is one of provisional determination results, and
• the anomaly determination method further comprises:
• executing, by the execution circuitry, the calculation process for the maps;
• obtaining, by the execution circuitry, the provisional determination results, the provisional determination results being respectively obtained by executing the provisional determination processes for the output variables output from the maps, and
• treating, by the execution circuitry, a majority of the provisional determination results as the final determination result in the determination finalizing process.

A non-transitory computer-readable medium that stores a program for causing execution circuitry to execute an anomaly determination process for a water pump, memory circuitry storing map data that defines a map, the anomaly determination process comprising:

• acquiring, by execution circuitry, an input variable to the map from image data obtained by capturing an outer surface of the water pump, the water pump forcibly delivering coolant from an internal combustion engine;
• executing, by the execution circuitry, a calculation process that outputs a value of an output variable of the map by inputting the input variable to the map, the output variable indicating whether the coolant has leaked out of the water pump;
• executing, by the execution circuitry, a provisional determination process that uses the output variable to obtain a provisional determination result indicating whether the coolant has leaked out of the water pump;
• and
• executing, by the execution circuitry, a determination finalizing process that uses the provisional determination result to obtain a final determination result indicating whether the coolant has leaked out of the water pump,
• the map is one of different maps that are defined by the map data,
• one or more of the maps have been learned through machine learning in advance,
• the provisional determination process is one of provisional determination processes,
• the provisional determination result is one of provisional determination results, and
• the anomaly determination process further comprises:
• executing, by the execution circuitry, the calculation process for the maps;
• obtaining, by the execution circuitry, the provisional determination results, the provisional determination results being respectively obtained by executing the provisional determination processes for the output variables output from the maps, and
• treating, by the execution circuitry, a majority of the provisional determination results as the final determination result in the determination finalizing process.