Multiple monitoring door lock

The invention discloses a multiple monitoring door lock. The state of a door is monitored through a first optocoupler, the state of a spring bolt is monitored through a second optocoupler, the state of a lock cylinder is monitored through a third optocoupler, in combination with the monitoring results of the first optocoupler and the second optocoupler, whether locking is correct or not under thelocking state is judged, when the locking state is wrong, reminding is carried out in time, and the risk that due to the fact that a door is not locked effectively, and is not found in time, illegal encroachment is caused is avoided. In combination with the monitoring results of the second optocoupler and the third optocoupler, whether the lock is abnormal or not is judged, the lock abnormal statecan be found in time, in-time treatment is achieved, and the inconvenience possibly caused by abnormal sudden breaking out of the lock can be avoided. 本发明公开了一种多重监控门锁，通过第一光耦监控门的状态，通过第二光耦监控锁舌的状态，通过第三光耦监控锁芯状态。然后，结合第一光耦和第二光耦的监控结果