Patent ID: 11881066
Assignee: SCHLAGE LOCK COMPANY LLC
Field: Civil engineering (Other fields)
Classification: CPC E  G | IPC E  G

Claim 11:
12. An access control system, comprising:
a permanent magnet positioned at a door frame and structured to generate a first magnetic field; and
an access control device configured to determine whether the door is in an open state or a closed state based on the first magnetic field sensed by the access control device, wherein the access control device includes:
a mechanical component having dynamic motion and adapted to generate a second magnetic field as a result of the dynamic motion;
a first sensor configured to sense magnetic fields within a vicinity of the first sensor and positioned between the permanent magnet and the mechanical component in a first dimension; and
a second sensor configured to sense magnetic fields within a vicinity of the second sensor;
wherein the mechanical component is positioned between the first sensor and the second sensor in the first dimension.