Wireless tilt sensor alarm device, system and method

摘要

A security device for monitoring an object or a person, the device being adapted to be mountable to the said object or person and including a tilt sensing means comprising a tilt sensor and a control means configured and adapted to detect tilt movement of the object or person and generate an alarm signal when the detected tilt movement exceeds a threshold. The tilt sensing means includes a calibration means to automatically set the normal state of alignment of the object or person relative to a reference plane when the device is first mounted, and for resetting the normal state of alignment after an alarm condition has occurred and the object or person is in a different position from the previous normal state of alignment.