Shipping container security system

Details Shipping container security system Shipping container security system

2006-03-28

2006-03-28

Gregory, Bernarr E. (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Presence detection only

By motion detection

C342S027000, C342S052000, C342S058000, C342S060000, C342S134000, C342S137000, C342S175000, C342S195000

Reexamination Certificate

active

07019683

ABSTRACT:
A security system senses intrusions into a shipping container through the opening of doors, cutting an opening, or removing the doors from their hinges. Intrusion information is transmitted to a remote receiver without interrogation, thereby reducing power consumption. Sensing is accomplished by employing a range-gated micro-impulse radar (“RGR”) that generates microwave pulses that bounce around the interior of the container. The RGR includes a range gate that enables measuring reflected signals during the time gate period that is set for the time it takes a pulse to propagate a maximum distance within the container and reflect back. A direct current signal level is produced that represents the average reflected signal level within the container, and a Doppler shift measurement is made that represents motion inside the container. The signals are conveyed to the transmitter for conveyance to the remote receiver.

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“Universal Fire Transmitter (UFT)”, GE Interlogix Product Information, © 2002, GE Interlogix, Saint Paul, MN.

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