| 摘要 |
A cellular modem may give notice of changes in modes. The modem will change modes as a result of the breaking of a trip wire or the closing of contacts that are normally open or the opening of contacts that are normally closed or sensing motion or light, or sensing variations in resistance. One contact is provided to wake the unit from “sleep” and the other is provided to detect intrusion, motion, etc. Light detectors can detect light, such as when a closed container is opened. Closed contacts can be used in parallel to change any mode or open/closed contacts in parallel/series. The modem can be used to apprehend people breaking into or stealing luggage, equipment, boxes, etc. The present invention informs the user when the object being monitored is being moved or opened and can track the object's location. |
| 主权项 |
1. A modem for intrusion detection and tracking, comprising:
a) a modem removably attached on or within a container and switchable between a sleep mode and an active mode, said modem always connected to a source of power; b) said modem including communication means for wirelessly transmitting in said active mode a first signal to a remote receiver responsive to sensing one or more triggering conditions; c) plural sensing means connected to said modem for sensing said one or more triggering conditions, said plural sensing means being chosen form the group consisting of motion of said container, light shining on a light sensing means previously shielded from light, and intrusion into said container; d) whereby, responsive to said plural sensing means sensing said one or more triggering conditions, (1) said plural sensing means send second signal to said modem which, responsive thereto, switches from said sleep mode to said active mode and then send said first signal to said remote receiver to notify said remote receiver that (a) said one or more triggering conditions has/have been sensed, and (b) identifying a particular triggering condition or particular triggering conditions from said one or more triggering conditions and identifying which one(s) of said motion of said container, said light shining on said light sensing means previously shielded from light, and/or said intrusion into said container which has/have been sensed, and (2) said modem activates means for tracking a location of said container, said means for tracking the location of said container being deactivated prior to its activation; and e) wherein said active mode comprises:
(1) a tracking mode in which any one of said plural sensing means is employed and signals no present intrusion, said tracking mode operating both when said container is still and when said container is in motion;(2) a motion detecting mode that detects whether said container is still or in motion by notifying to the remote receiver when a change from still to moving or from moving to still has taken place; and(3) an alarm mode in which, responsive to actuation of any one of said plural sensing means, an enunciation is changed to denote intrusion, said alarm mode operating both when said container is still and when said container is in motion. |
