Patent US4604738A successfully refreshed from Google Patents.
US4604738A
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Method and apparatus for classification of a moving terrestrial vehicle as light or heavy
Assignee: Northrop Grumman Innovation Systems LLC
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Filing: 1982-02-22
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Granted: 1986-08-05
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Expires: 2002-02-22
Abstract
Abstract The subject invention discloses a conventional method and apparatus for classifying terrestrial moving vehicles in which the seismic signal generated by the vehicle is broken into its Rayleigh and acoustically coupled components. The ratio of the Rayleigh component to the acoustically coupled component is used to classify the vehicle as heavy or light.
Inventors
- 👤 Raj Aggarwal
- 👤 Bindinganavle R. Suresh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:35
CPC Classifications
G; G08; G08G; G08G1/00; G08G1/01; G08G1/015; G01; G01V; G01V1/00; G01V1/001; G10; G10L; G10L25/00; G10L25/48; G10L25/51; Y; Y10; Y10S; Y10S181/00; Y10S181/40; Y10S181/401
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
94 words
A system for classifying a terrestrial moving object as either heavy or light, comprising in combination: means for detecting a seismic signal generated by said object; means for separating said seismic signal into a signal component which is a function of the Rayleigh component of the seismic signal and a signal component which is a function of the acoustically coupled component of the seismic signal; and means responsive to the relative magnitudes of said Rayleigh and acoustically coupled seismic component signals for classifying said terrestrial moving object as either relatively heavy or relatively light.
Claim 2
Independent Claim
94 words
A system for classifying a terrestrial moving object as either heavy or light, comprising in combination: means for detecting a seismic signal generated by said object; means for separating said seismic signal into a signal component which is a function of the Rayleigh component of the seismic signal and a signal component which is a function of the acoustically coupled component of the seismic signal; and means responsive to the relative magnitudes of said Rayleigh and acoustically coupled seismic component signals for classifying said terrestrial moving object as either relatively heavy or relatively light.
Claim 3
Independent Claim
112 words
A system for classifying a terrestrial moving object as either heavy or light, comprising in combination: means for detecting a seismic signal generated by said object; means for detecting an acoustic signal generated by said object; means responsive to said seismic signal and said acoustic signal for separating said seismic signal into a signal component which is a function of the Rayleigh component of the seismic signal and a signal component which is a function of the acoustically coupled component of the seismic signal; and means responsive to the relative magnitudes of said Rayleigh and acoustically coupled seismic component signals for classifying said terrestrial moving object as either heavy or relatively light.
Claim 4
Independent Claim
112 words
A system for classifying a terrestrial moving object as either heavy or light, comprising in combination: means for detecting a seismic signal generated by said object; means for detecting an acoustic signal generated by said object; means responsive to said seismic signal and said acoustic signal for separating said seismic signal into a signal component which is a function of the Rayleigh component of the seismic signal and a signal component which is a function of the acoustically coupled component of the seismic signal; and means responsive to the relative magnitudes of said Rayleigh and acoustically coupled seismic component signals for classifying said terrestrial moving object as either heavy or relatively light.
References Cited (Backward Citations)
US4158832A
Cited
US3585581A
Cited
US3995223A
Cited
US3824532A
Cited
US3984804A
Cited
US4337528A
Cited
US3891865A
Cited
US4081785A
Cited
US3903512A
Cited
US4090180A
Cited
US4271491A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-08-04 | 1990-02-03 | 1990-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-04 | 1994-02-03 | 1994-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-04 | 1998-02-03 | 1998-08-05 | $7700.00 | Window Closed / Lapsed |