US Patent 9251677 Powered entrance barrier alarm device and system using same

A powered entrance barrier door alarm device and system is configured to alert someone of an unauthorized breach of a powered entrance barrier, such as a garage door, whereby the powered entrance barrier is opened without the use of the powered entrance barrier opener. The powered entrance barrier alarm system includes a powered entrance barrier position sensor, and a detector circuit coupled with a powered entrance barrier opener power supply. The detector circuit measures an electrical power parameter to a powered entrance barrier opener. A detector module having a controller monitors the inputs from the detector circuit and the powered entrance barrier positioning sensor to determine if an alarm should be initiated. A detector module may have an electrical plug and an electrical outlet for a powered entrance barrier opener.