Working vehicle periphery monitoring system and working vehicle

A working vehicle periphery monitoring system comprising:

• a plurality of image capturing devices that are attached to a working vehicle and capture a periphery of the working vehicle to output image information;
• a synthesis process unit that acquires the image information output from the plurality of image capturing devices and synthesizes the acquired image information to generate synthesis image information;
• an updating information adding unit that adds updating information representing that the synthesis image information is newly generated by the synthesis process unit to the synthesis image information generated by the synthesis process unit;
• a synthesis image storage unit that stores the synthesis image information to which the updating information is added;
• an image display process unit that displays an image based on the synthesis image information stored in the synthesis image storage unit on an image display device;
• and
• an updated state determining unit that acquires the synthesis image information to which the updating information is added from the synthesis image storage unit, detects that the synthesis image information is updated based on the updating information,
• wherein
• the updated state determining unit notifies information representing an abnormality to the image display device when the updated state determining unit does not detect that the synthesis image information is updated,
• the synthesis process unit synthesizes the acquired image information to generate the synthesis image information and outputs a synthesis process end signal to the updating information adding unit,
• the updating information adding unit determines whether to add the updating information based on the synthesis process end signal,
• the updated state determining unit notifies information representing an abnormality when the updated state determining unit detects that the updating information included in the synthesis image information acquired at the current time and the updating information included in the synthesis image information acquired before the current time are equal to each other, and
• the updated state determining unit determines that the synthesis image information is updated when the updated state determining unit detects that the updating information included in the synthesis image information acquired at the current time and the updating information included in the synthesis image information acquired before the current time are different from each other, and
• the image display process unit generates an image signal from the synthesis image information included in the updated synthesis image information when the updated state determining unit determines that the synthesis image information is updated, and
• the image display process unit displays an image based on the generated image signal on the image display device.