Swept range gate short range radar system
First Claim
1. A method for detecting an object located behind a surface, comprising the steps of:
- applying a radar receiver/transmitter unit to the surface;
transmitting a sequence of radar pulses from the radar receiver/transmitter unit into the surface;
receiving the transmitted radar pulses at the unit after the transmitted radar pulses are reflected from the object; and
continuously sweeping a range gate delay between the transmission and receipt of the radar pulses;
moving the unit in two directions on the surface to a plurality of locations on the surface; and
indicating a depth of the object from the surface and a size of the object at each location, from the range gate delay of the radar pulses at that location.
0 Assignments
0 Petitions
Accused Products
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.
-
Citations
7 Claims
-
1. A method for detecting an object located behind a surface, comprising the steps of:
-
applying a radar receiver/transmitter unit to the surface; transmitting a sequence of radar pulses from the radar receiver/transmitter unit into the surface; receiving the transmitted radar pulses at the unit after the transmitted radar pulses are reflected from the object; and continuously sweeping a range gate delay between the transmission and receipt of the radar pulses; moving the unit in two directions on the surface to a plurality of locations on the surface; and indicating a depth of the object from the surface and a size of the object at each location, from the range gate delay of the radar pulses at that location. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
Specification