US5315561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radar system and components therefore for transmitting an electromagnetic signal underwater
Assignee: OL Security LLC
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Filing: 1993-06-21
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Granted: 1994-05-24
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Expires: 2013-06-21
Abstract
Abstract A radar system is shown to include a transmitter for transmitting a pulsed electromagnetic signal having a frequency less than 500 Hz and a receiver for receiving a (scattered) reflected signal provided from the pulsed electromagnetic signal (scattered) reflected from an anomaly below the surface of the water. The radar system further includes a switch for inhibiting the receiver from receiving a reflected signal provided from the pulsed electromagnetic signal reflected from the surface of the water and a signal processor for controlling interoperability of the transmitter, the receiver and the switch. With such an arrangement, a radar system is provided for detecting anomalies such as a wake of a moving vessel (if and when this produces a conductivity anomaly), or a plume of oil beneath the surface of water.
Inventors
- 👤 Mario D. Grossi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:28
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/0209; G01S13/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
106 words
A radar system for transmitting an electromagnetic signal into water having a surface from above the surface of the water to below the surface of the water comprising: (a) means for transmitting a pulsed electromagnetic signal having a frequency less than 500 Hz; (b) means for receiving a reflected signal provided from the pulsed electromagnetic signal reflected from an anomaly below the surface of the water; (c) means for inhibiting the receiving means from receiving a reflected signal provided from the pulsed electromagnetic signal reflected from the surface of the water; and (d) means for controlling the transmitting means, the receiving means and the inhibiting means.
Claim 2
Dependent Claim
106 words
A radar system for transmitting an electromagnetic signal into water having a surface from above the surface of the water to below the surface of the water comprising: (a) means for transmitting a pulsed electromagnetic signal having a frequency less than 500 Hz; (b) means for receiving a reflected signal provided from the pulsed electromagnetic signal reflected from an anomaly below the surface of the water; (c) means for inhibiting the receiving means from receiving a reflected signal provided from the pulsed electromagnetic signal reflected from the surface of the water; and (d) means for controlling the transmitting means, the receiving means and the inhibiting means.
Claim 3
Dependent Claim
30 words
The radar system as recited in claim 1 further comprising a signal processor means for processing said reflected signals reflected from the anomaly for detecting the presence of said anomaly.
Claim 4
Dependent Claim
27 words
The radar system as recited in claim 2 wherein the signal processor means comprises means for detecting a wake created by a vessel moving in the water.
Claim 5
Dependent Claim
17 words
The radar system as recited in claim 1 wherein the transmitting means comprises a magnetic dipole antenna.
Claim 6
Dependent Claim
28 words
The radar system as recited in claim 2 wherein the signal processing means comprises means for detecting a plume of oil disposed beneath the surface of the water.
Claim 7
Independent Claim
100 words
A method of operating a radar system for detecting an anomaly beneath the surface of water comprising the steps of: (a) transmitting a pulsed electromagnetic signal toward the surface of the water; (b) inhibiting reception of signals for a length of time corresponding to the length of time required for the pulsed electromagnetic signal to travel to and reflected from the surface of the water; (c) receiving the signals reflected from an anomaly beneath the surface of the water; and (d) processing signals reflected from the anomaly beneath the surface of the water to determine the presence of the anomaly.
Claim 8
Independent Claim
100 words
A method of operating a radar system for detecting an anomaly beneath the surface of water comprising the steps of: (a) transmitting a pulsed electromagnetic signal toward the surface of the water; (b) inhibiting reception of signals for a length of time corresponding to the length of time required for the pulsed electromagnetic signal to travel to and reflected from the surface of the water; (c) receiving the signals reflected from an anomaly beneath the surface of the water; and (d) processing signals reflected from the anomaly beneath the surface of the water to determine the presence of the anomaly.
Claim 9
Dependent Claim
42 words
The method of operating a radar system as recited in claim 6 wherein the step of processing signals further comprises the step of determining the anomaly is a long lasting wake created by a moving vessel beneath the surface of the water.
Claim 10
Dependent Claim
38 words
The method of operating a radar system as recited in claim 6 wherein the step of processing signals further comprises the step of determining the anomaly is a plume of oil disposed beneath the surface of the water.
References Cited (Backward Citations)
US3153236A
Cited
US3903520A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-05-23 | 1997-11-22 | 1998-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-23 | 2001-11-22 | 2002-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-23 | 2005-11-22 | 2006-05-24 | $7700.00 | Window Closed / Lapsed |