| 摘要 |
A cost-effective ultrawide band radar system (32) 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 ultrawide band radar pulses are emitted without a carrier and the system (32) detects reflected 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. A 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.
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