US5680048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mine detecting device having a housing containing metal detector coils and an antenna
Assignee: Net Results Inc
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Filing: 1996-08-19
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Granted: 1997-10-21
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Expires: 2016-08-19
Abstract
Abstract A device detects metallic and non-metallic objects on, flush with, or covered by the ground or other surfaces, or by interfering or obscuring structures or surfaces, using ground penetrating radar, a metal detector and a radiometer. It is specifically designed for detection of non-metallic mines. The coils of the metal detector are mounted in a multi-sensor module with the radar antenna in a co-boresighted and/or co-located arrangement, without degrading the performance of the metal detector or the ground penetrating radar. Preferably, the ground penetrating radar uses a feed and a collimation lens, (such as a Luneberg or Step Dielectric lens), as an antenna to reduce the change in the loss of signal strength due to changes in distance between the surface and the antenna, (for short distances). The collimated beam has approximately constant power for distances closer than twice the diameter of the lens. By using the lens with a ground penetrating radar, the antenna can be held somewhat farther from the ground, as well as eliminating "clutter" introduced as the antenna moves closer and farther from the ground. The sensor for the radiometer is co-located in the multi-sensor module. The sensors selected for the multi-sensor module employ different detection phenomena. Therefore, each sensor has its unique source for false alarms. The sensors' independent phenomenologies provide a synergism, which when processed, achieve an increase in probability of detection concurrent with a reduction in the false alarm rate for mines.
Inventors
- 👤 Walter Thomas Wollny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:32
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/0209; F; F41; F41H; F41H11/00; F41H11/12; G01V; G01V3/00; G01V3/15; G01V3/17; H; H01; H01Q; H01Q1/00; H01Q1/04; H01Q7/00; G01S13/88; G01S13/882; G01S7/00; G01S7/02; G01S7/027; G01S7/03
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
112 words
A mine detection system comprising: a wand having a first end and an opposite second end; a housing mounted onto said first end of said wand; a signal processor supported by said wand; a ground penetrating radar system in communication with said signal processor, said radar system including a transmitter, a receiver, and an antenna, said antenna having a first field of view; and a metal detector system in communication with said signal processor, said metal detector system including metal detector coils, said metal detector coils having a second field of view; said antenna and said metal detector coils being contained within said housing, said metal detector coils concentrically surrounding said antenna.
Claim 2
Dependent Claim
112 words
A mine detection system comprising: a wand having a first end and an opposite second end; a housing mounted onto said first end of said wand; a signal processor supported by said wand; a ground penetrating radar system in communication with said signal processor, said radar system including a transmitter, a receiver, and an antenna, said antenna having a first field of view; and a metal detector system in communication with said signal processor, said metal detector system including metal detector coils, said metal detector coils having a second field of view; said antenna and said metal detector coils being contained within said housing, said metal detector coils concentrically surrounding said antenna.
Claim 3
Dependent Claim
31 words
The mine detection system according to claim 1, wherein said first field of view of said antenna is substantially similar to said second field of view of said metal detector coils.
Claim 4
Dependent Claim
28 words
The mine detection system according to claim 1, wherein said antenna is selected from the group consisting of co-polarized, cross polarized, dual polarized, circularly polarized, and combinations thereof.
Claim 5
Dependent Claim
34 words
The mine detection system according to claim 1, wherein said first field of view of said antenna is offset from said second field of view of said metal detector coils by a predetermined angle.
Claim 6
Dependent Claim
35 words
The mine detection system according to claim 1, wherein said radar system is selected from the group consisting of stepped continuous wave, impulse, pulse, swept FM, continuous wave, monostatic, bistatic, balance bridge and combinations thereof.
Claim 7
Dependent Claim
107 words
A mine detection system comprising: a wand having a first end and an opposite second end; a housing mounted onto said first end of said wand; a signal processor supported by said wand; a ground penetrating radar system in communication with said signal processor, said radar system including a transmitter, a receiver, and an antenna, said antenna being contained within said housing and including an antenna feed and a collimation lens for producing a collimated beam, said antenna feed being mounted onto said lens; and a metal detector system in communication with said signal processor, said metal detector system including metal detector coils contained within said housing.
Claim 8
Dependent Claim
107 words
A mine detection system comprising: a wand having a first end and an opposite second end; a housing mounted onto said first end of said wand; a signal processor supported by said wand; a ground penetrating radar system in communication with said signal processor, said radar system including a transmitter, a receiver, and an antenna, said antenna being contained within said housing and including an antenna feed and a collimation lens for producing a collimated beam, said antenna feed being mounted onto said lens; and a metal detector system in communication with said signal processor, said metal detector system including metal detector coils contained within said housing.
Claim 9
Dependent Claim
28 words
The mine detection system according to claim 6, wherein said antenna is selected from the group consisting of co-polarized, cross polarized, dual polarized, circularly polarized, and combinations thereof.
Claim 10
Dependent Claim
23 words
The mine detection system according to claim 6, further including a lens support and spacer contained within said housing for supporting said lens.
Claim 11
Dependent Claim
35 words
The mine detection system according to claim 6, wherein said radar system is selected from the group consisting of stepped continuous wave, impulse, pulse, swept FM, continuous wave, monostatic, bistatic, balance bridge and combinations thereof.
Claim 12
Dependent Claim
14 words
The mine detection system according to claim 6, wherein said collimation lens is spherical.
Claim 13
Dependent Claim
24 words
The mine detection system according to claim 10, wherein said antenna feed is mounted onto said spherical lens at an angle offset from vertical.
Claim 14
Dependent Claim
22 words
The mine detection system according to claim 11, further including a radiometer in communication with said signal processor and said antenna feed.
Claim 15
Dependent Claim
17 words
The mine detection system according to claim 10, wherein two antenna feeds are mounted onto said lens.
Claim 16
Dependent Claim
21 words
The mine detection system according to claim 13, wherein said two antenna feeds are configured to operate within identical frequency bands.
Claim 17
Dependent Claim
29 words
The mine detection system according to claim 13, wherein said two antenna feeds are configured to operate in different frequency bands for increasing operational bandwidth of said radar system.
Claim 18
Dependent Claim
17 words
The mine detection system according to claim 10, wherein three antenna feeds are mounted onto said lens.
Claim 19
Dependent Claim
21 words
The mine detection system according to claim 16, wherein said three antenna feeds are configured to operate within identical frequency bands.
Claim 20
Dependent Claim
29 words
The mine detection system according to claim 16, wherein said three antenna feeds are configured to operate in different frequency bands for increasing operational bandwidth of said radar system.
Claim 21
Dependent Claim
28 words
The mine detection system according to claim 16, including a radiometer utilizing said three antenna feeds to produce an array of contiguous beams perpendicular to a scan direction.
Claim 22
Dependent Claim
110 words
An object detection system comprising a ground penetrating radar system, a metal detector system, a radiometer and a multi-sensor module including at least one radar antenna and metal detector coils, and wherein: said radar antenna includes at least three antenna feeds and a spherical lens for producing a collimated beam; said metal detector coils and said radar antenna are co-boresighted; said radiometer utilizes at least two antenna feeds of said at least three antenna feeds to produce an array of contiguous beams perpendicular to a scan direction; and said at least two antenna feeds are mounted on said spherical lens at a point offset from vertical by a predetermined angle.
Claim 23
Dependent Claim
110 words
An object detection system comprising a ground penetrating radar system, a metal detector system, a radiometer and a multi-sensor module including at least one radar antenna and metal detector coils, and wherein: said radar antenna includes at least three antenna feeds and a spherical lens for producing a collimated beam; said metal detector coils and said radar antenna are co-boresighted; said radiometer utilizes at least two antenna feeds of said at least three antenna feeds to produce an array of contiguous beams perpendicular to a scan direction; and said at least two antenna feeds are mounted on said spherical lens at a point offset from vertical by a predetermined angle.
References Cited (Backward Citations)
US3307187A
Cited
US3775765A
Cited
US4072942A
Cited
JPS60233584A
Cited
US4698634A
Cited
US5307272A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-10-20 | 2001-04-21 | 2001-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-10-20 | 2005-04-21 | 2005-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-10-20 | 2009-04-21 | 2009-10-21 | $7700.00 | Window Closed / Lapsed |