摘要:
The present invention is a system and method for monitoring and controlling a movable barrier operator utilizing satellite communication capabilities. The invention comprises an access control system that utilizes a satellite link to connect a command center to one or more movable barrier operators, allowing instant monitoring, maintenance, and control of one or more movable barriers from a remote location. By configuring an access control system for telemetry communication via satellite, an exchange of information between one or more access control units, or movable barrier operators, portable remote units, or a single access unit, can be established, thus eliminating the need to physically access a movable barrier operator when service or repairs are required.
摘要:
A method and a device capable of making fine-tune adjustments in the traveling limits of a movable barrier operator are disclosed. More particularly, an apparatus in accordance with the present invention comprises of a movable barrier operator for controlling a travel limit of a movable barrier comprises of an electrical component sending an input signal to a controller, a controller to derive an output signal from the input signal, and a motor to receive the output signal and modify the travel limit of the movable barrier. More specifically, said method and device can be used to make such fine-tune adjustments to modify an undesirable gap of a movable barrier in its fully closed or fully open positions.
摘要:
A method and a device capable of making fine-tune adjustments in the traveling limits of a movable barrier operator are disclosed. More particularly, an apparatus in accordance with the present invention comprises of a movable barrier operator for controlling a travel limit of a movable barrier comprises of an electrical component sending an input signal to a controller, a controller to derive an output signal from the input signal, and a motor to receive the output signal and modify the travel limit of the movable barrier. More specifically, said method and device can be used to make such fine-tune adjustments to modify an undesirable gap of a movable barrier in its fully closed or fully open positions.
摘要:
A system and method is disclosed to the elimination of cross talk between inductive loop detector units in a security system. The system includes appropriate devices for assigning different operational frequencies of each loop detector circuit to avoid cross talk. In a further aspect it provides a system and method for determining actual operational frequencies of various loop detector circuits in a security system and for changing the resonant frequencies to eliminate cross talk.
摘要:
A method and apparatus for moving a gate a distance in a predetermined period of time. In one embodiment the current load for an electric motor to move a gate is first measured to determine whether the gate's motion is being hindered or helped. A microprocessor then controls voltage supplied to the motor to enhance or retard the evolved power of the motor according to the load and the predetermined time.