Energy saving motor-driven locking subsystem
US7006799B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2002 |
| Grant date | Feb 28, 2006 |
| Priority date | — |
| Expiry date | May 6, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D30/70
- WIPO fieldControl
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.