Device and method for unlocking a lock by use of monitoring of current
AssigneePhoniro AB
InventorsOlle Bliding, Johan Hörberg, Lennart Sjöstedt, Thomas Persson
Life of this patent
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Abstract
A lock device is adapted to unlock a lock by transferring a lock catch from a locking position to a releasing position. The device has an electric motor mechanically connected to an axle by means of at least one transmission means, and rotation of said axle actuates the lock catch. The device is characterized in that it comprises means for monitoring the current consumed by the electric motor.
Claims23
A lock device adapted to unlock a lock by transferring a lock catch from a locking position to a releasing position, said lock device comprising:
- an electric motor mechanically connected to an axle via at least one transmission device, rotation of the axle actuating the lock catch;
- and
- means for monitoring current consumed by the electric motor, the lock device based on the monitored current, stopping a transfer of the lock catch before the lock catch reaches a permanent stop.
A method for locking/unlocking a lock with a lock device having a motor controller controlling an electrical motor mechanically connected to a lock catch of the lock and a device capable of monitoring the current consumed by the motor, said method comprising:
- sending instructions to a motor controller to actuate the motor in an opening direction;
- monitoring current consumed during the operation of the motor;
- comparing the current consumed as a function of time with reference current characteristics;
- determining when the lock is locked/unlocked based on said comparison;
- and
- stopping actuation of the motor, wherein the actuation is stopped prior to the lock catch reaching a permanent stop.
Dependencies are inferred from the claim text.