Energy saving motor-driven locking subsystem

Details Energy saving motor-driven locking subsystem Energy saving motor-driven locking subsystem

2006-02-28

2006-02-28

Tran, Pablo N. (Department: 2685)

Telecommunications

Transmitter and receiver at separate stations

Having measuring, testing, or monitoring of system or part

C455S574000, C455S041200, C340S870030, C318S480000

Reexamination Certificate

active

07006799

ABSTRACT:
In an access control system, a method and system for conserving battery life comprising an electronic control processor in a motor-driven locking subsystem for measuring samples of back electromotive force from a DC motor within the motor-driven locking subsystem. The samples of the back electromotive force are summed by the electronic control processor to form a comparison parameter value. The comparison parameter value is compared to a pre-determined threshold value to form a decision parameter. An action is taken by the electronic control processor in the motor-driven locking subsystem based on the decision parameter. This action comprises one of commanding the battery source in the motor-driven locking subsystem to increase the voltage level to the motor, generating a fail signal, or detecting and indicating a lock or unlock condition.

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“Circuit Design for Electronic Instrumentation” by Darold Wobschall, pp. 367-369.

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