Motion detection and alerting system
US6700528B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 2002 |
| Grant date | Mar 2, 2004 |
| Priority date | — |
| Expiry date | Sep 27, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/88
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A compact, autonomous motion detecting and alerting system alerts to the movement of objects of interest. Mounted on an environmentally sealed PC board are a transceiver such as a CW radar front-end, connectors, signal processors and a communications device. The system provides early warning of movement of an ice sheet or rubble field via the communication device that may be a cellular telephone. This system is mounted proximate the target surface under observation, oriented at pre-specified offset angles both laterally and in elevation. The target is illuminated and energy reflected therefrom is mixed with a portion of the transmitted signal to produce a difference frequency signal that is processed to establish existence of motion within a pre-specified velocity range. Upon verification of motion, notification is sent to a responsible authority. An autonomous or semi-autonomous power source and integral power management function may be incorporated on the same PC board.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.