Helmet return state detection method and system, shared electric vehicle and medium

The invention discloses a helmet return state detection method and system, a shared electric vehicle and a medium, relates to the field of helmet return detection, enables a mechanical lock to be in a non-exposed state, and reduces the risk of damage to the mechanical lock. After the preset signal is received, whether the helmet can be returned or not is judged, if the helmet can be returned, whether the helmet is in the returned state or not is judged within the first preset time period after it is judged that the helmet can be returned, and in this way, whether the helmet is successfully returned or not can be judged more accurately; the probability that the helmet is easy to lose is reduced, the operation cost is reduced, and the user experience is improved. 本发明公开了一种头盔归还状态检测方法、系统、共享电动车及介质，涉及头盔归还检测领域，使机械锁处于非暴露状态，降低了机械锁损坏的风险。且在接收到预设信号后，先对头盔是否可以归还做出判断，如果头盔可以归还，则在判定头盔可以归还后的第一预设时间段内判断头盔是否为已归还状态，通过这种方式可以更准确的判断头盔是否已经归还成功，降低了头盔容易丢失问题出现的几率，降低了运营成本，提高了用户的体验。