Work machine and abnormality detection for pin position detection device

A work machine comprising:

• a plurality of booms that are telescoped with telescopic cylinders;
• a first pin capable of transitioning between an in-state in which the boom and the telescopic cylinder are connected and an out-state in which a connection of the boom and the telescopic cylinder is released;
• a second pin capable of transitioning between an in-state in which adjacent booms are connected and an out-state in which a connection of the adjacent booms is released;
• a main-detection device and a sub-detection device that are able to detect a combination of the states of the first pin and the second pin;
• and
• a control unit that controls a telescopic movement of the boom on a basis of a detection result of the main-detection device,
• wherein the control unit controls ON/OFF of a first flag indicating whether or not the main-detection device was able to detect the combination and ON/OFF of a second flag indicating whether or not the sub-detection device was able to detect the combination during the telescopic movement of the boom and detects that an abnormality has occurred in the main-detection device and the sub-detection device on a basis of the first flag and the second flag,
• wherein the control unit compares the first flag with the second flag, and specifies an abnormal detection device in which the abnormality has occurred among the main-detection device and the sub-detection device,
• wherein the combination of the states of the first pin and the second pin includes
• a first set in which the first pin is the in-state and the second pin is the in-state,
• a second set in which the first pin is the in-state and the second pin is the out-state, and
• a third set in which the first pin is the out-state and the second pin is the in-state,
• wherein the first flag includes three first flag elements corresponding to the first set, the second set, and the third set,
• wherein the second flag includes three second flag elements corresponding to the first set, the second set, and the third set, and
• wherein when all the flag elements of one flag of the first flag and the second flag are turned on, the control unit compares the first flag with the second flag to specify the abnormal detection device.