Patent ID: 7944369

Claim:
A security device for use in monitoring an object, the security device, in use, being mounted directly to said object to be monitored, the security device including a tilt sensing means, the tilt sensing means including a tilt sensor and a control means configured and adapted to detect tilt movement of the said object caused by unauthorized movement of the object and generating an alarm signal when the detected change of tilt movement of the said object exceeds a tilt alarm threshold, the change of tilt movement is between a predetermined normal state of alignment of the said object relative to a reference plane and the preset threshold level for triggering an alarm signal wherein the tilt sensing means includes a calibration means configured to automatically set the normal state of alignment of the said object at any tilt angle relative to a reference plane when first mounted and thus not requiring the security device, in use, to be mounted in a precisely defined position relative to the vertical and/or horizontal position, and wherein the tilt sensing means includes a resetting means configured to monitor the tilt movement of said object, and to reset the normal state of alignment of said object to any other tilt angle after an alarm condition has occurred and when said object is detected as being tilted in a different position from the previous normal state of alignment, and wherein the tilt sensing means includes a recalibration means wherein the tilt alarm threshold of said object is configured to be checked at regular intervals for any change of tilt movement by unauthorized movement of the object to enable, in use, said object to recalibrate to a new tilt angle when said object has remained in a stationary position for a predetermined period of time.