Swept range gate short range radar system
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United States of America Patent
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Jul 30, 1996
Issued Date -
N/A
app pub date -
May 30, 1995
filing date -
Sep 2, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A cost-effective ultra-wideband band radar system capable of locating nearby buried objects such as reinforcing steel rods, pipes, and other objects buried in concrete, soil, behind walls, or in the air. A sequence of ultra-wideband band radar pulses are emitted without a carrier and the system detects deflected pulse energy caused by the transmitted pulse whenever encountering a change in the medium i.e. an air to metal change or concrete to metal change. This reflected energy is detected and visually displayed. The range gate delay is continuously varied, thus changing the distance from the unit to where the reflected energy would be potentially detected from the target. By continuously sweeping the 'depth' of the scan, the operator need only move the unit in two dimensions across the surface to detect objects buried or hidden at varying depths interior to or behind the surface. The range gate system includes a multipoint background subtraction, corrected gain with distance, linear range gate time correction and a dielectric constant correction for a calibrated distance display.
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