Electrical audio signal processing systems and devices – Vehicle
Patent
1997-03-20
2000-01-11
Isen, Forester W.
Electrical audio signal processing systems and devices
Vehicle
381 56, 381 711, 340933, 340941, 701 32, H04B 100
Patent
active
060144475
ABSTRACT:
A system for passively sensing low frequency (5 Hz to 50 kHz) EM emanations from vehicles and classifying them on that basis. A temporal frequency response is computed for the sensed EM emanations. Harmonic, non-harmonic and temporal features are extracted from the response and used to classify the vehicle. In the preferred embodiment, the temporal frequency response is displayed as a time, frequency and intensity plot, from which a technician visually extracts these features. The features can then be used either to determine a "signature" for classifying the vehicle or to determine specific characteristics which, in turn, can be used to classify the vehicle. Alternately, the feature extraction and classification can be performed by an automated classifier.
REFERENCES:
patent: 3727488 (1973-04-01), Wakamatsu et al.
patent: 3889181 (1975-06-01), Greer
patent: 4829434 (1989-05-01), Karmel et al.
patent: 4876721 (1989-10-01), Kerr et al.
patent: 5396233 (1995-03-01), Hofmann
patent: 5426363 (1995-06-01), Akagi et al.
patent: 5455868 (1995-10-01), Sergent et al.
patent: 5473315 (1995-12-01), Holroyd
patent: 5493291 (1996-02-01), Bruggemann
patent: 5528234 (1996-06-01), Mani et al.
patent: 5557268 (1996-09-01), Hughes et al.
patent: 5559835 (1996-09-01), Betts
patent: 5600558 (1997-02-01), Mearek et al.
patent: 5614894 (1997-03-01), Stanczyk
patent: 5635903 (1997-06-01), Koike et al.
patent: 5661473 (1997-08-01), Paschal
patent: 5677960 (1997-10-01), Unno et al.
patent: 5761626 (1998-06-01), Tascillo et al.
patent: 5764139 (1998-06-01), Nojima et al.
patent: 5808907 (1998-09-01), Shetty et al.
patent: 5809437 (1998-09-01), Breed
patent: 5828334 (1998-10-01), Deegan
Palatnick et al., "Automatic Vehicle ID Systems--Method of Approach", IEEE Transactions on Vehicular Technology, vol. VT-19, No. 1, pp. 128-136, Feb. 1990.
Eaton Wilbur W.
Kohnen Kirk
Alkov Leonard A.
Isen Forester W.
Lenzen, Jr. Glenn H.
Mei Xu
Raufer Colin M.
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