Commutator on-off detection mechanism with self-checking function and detection method

The invention discloses a commutator on-off detection mechanism with a self-checking function and a detection method, the detection mechanism comprises an upper detection module and a lower detection module, the lower detection module is correspondingly arranged right below the upper detection module, the upper detection module is provided with upper elastic sheets, the lower detection module is provided with lower elastic sheets, and the number of the upper elastic sheets is equal to that of the lower elastic sheets; the upper detection module can press a commutator to be detected downwards to be clamped into the lower detection module, so that the commutator is in contact with a lower elastic piece of the lower detection module, and the upper detection module makes an upper elastic piece in contact with the commutator after action. The device is high in detection efficiency, does not need to replace accessories frequently, is not liable to cause the phenomena of missing detection and false detection, and gu