Abstract:
A system and method for determining the position of a moveable barrier relative to the fully open position and fully closed position. The invention utilizes in a preferred embodiment a geo-magnetic sensor to determine the extent to which the barrier has traveled from reference position of fully open or fully closed to some intermediate point. A multi-axis sensor provides an output which changes during the barrier's excursion relative to each of the respective axes so that direction or tilt may be readily known in between the closed and open positions. Operation of the gate or barrier may be more efficiently controlled when its precise location between open and closed is known.
Abstract:
A system and method for detecting a tampering of a moveable gate barrier. A singular or a plurality of vibration sensors are strategically positioned on the gate and a gate operator to detect tampering while the gate is closed. If the sensor outputs exceed preset thresholds of duration and/or magnitude, an alarm is activated to alert personnel to an attempted breach of the gate barrier.
Abstract:
An access control apparatus with an outer housing including a door and a plurality of outer keys, a substantially closed inner housing that is removably mounted within the outer housing, and an electronic communication device within the inner housing which is operably connected to a telephone system and to the outer keys.
Abstract:
A chain driven gate and security system is provided. The system includes a gate which is opened and closed by a gate operator. The gate operator includes a chain and a motor having a rotatable sprocket for engaging the links of a chain. The gate and security system includes a sensor for detecting whether the chain has been severed, an alarm for producing a visible or audible alert, and a processor connected to the motor, sensor and alarm. The processor activates an alarm in the event that the processor indicates that the gates should be closed, but that the chain has been severed.
Abstract:
A system and method for detecting an object or obstruction in the path of a moveable barrier or automatic gate and allowing a coupled controller to determine corrective action prior to the moveable barrier coming in physical contact with such object or obstruction. A plurality of sensors in a physical array is used to detect such objects in the path of a barrier as it moves from closed to open and vice versa. The output of each respective sensor is compared to all of the others. In the preferred embodiment, if all of the sensor outputs are the same, it is assumed that there is no obstruction. However, if the output of any one sensor differs from the output of another sensor, it is assumed that there is an obstruction and the gate is either stopped or reversed before contact is made.
Abstract:
A lock module housing containing the components of a preferred embodiment is physically mounted to the rear of a gate drive motor of an automatic gate system. A solenoid front shaft, when the solenoid is de-energized, is pushed into a sprocket attached to the drive motor, thus preventing the motor shaft from turning. To release the drive motor, the solenoid is energized. The solenoid rear shaft contacts a limit switch to indicate to the controller that the drive motor is indeed unlocked. When the controller is about to move the gate, energizing the solenoid retracts the shaft and allows normal operation of the gate control system. At the end of the gate cycle, the solenoid is de-energized and the drive motor is once again locked. In the case of a manual release, a key lock is turned from a first position to a second position to unlock the motor shaft. A mechanical linkage arm attached to the key lock pulls the solenoid shaft to its energized position, which in turn contacts the limit switch. The gate can then be back driven manually.
Abstract:
A manual override device is disclosed for use with an automatic transponder system. This system has the capability of detecting errors in the operation of the system, and then for allowing for a manual override to initiate operation of a security gate when such is necessary.