Method and device for classifying vehicles
First Claim
1. A signal processing device for obtaining vehicle electromagnetic signature data from electromagnetic signals from at least one roadbed electromagnetic loop, the device comprising:
- means for obtaining a digitized signal from the electromagnetic signals, means for determining if a digitized signal is a vehicle electromagnetic signature signal, and means for calculating electromagnetic signature data of a vehicle from the digitized signal, and for sequencing and time-stamping each electromagnetic signature data point in synchronized and real-time manner.
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Accused Products
Abstract
A device for obtaining vehicle electromagnetic signature data from electromagnetic signals includes means (16) for obtaining a digitized signal from measured electromagnetic signals. The device further includes means (20) for determining if a digitized signal is a vehicle electromagnetic signature signal. The means (20) then calculate electromagnetic signature data of a vehicle from the digitized signal, and time-stamp each data point of the electromagnetic signature. Vehicles can therefore be classified in accordance with several criteria by specific processing of the digitized electromagnetic signature signals.
27 Citations
36 Claims
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1. A signal processing device for obtaining vehicle electromagnetic signature data from electromagnetic signals from at least one roadbed electromagnetic loop, the device comprising:
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means for obtaining a digitized signal from the electromagnetic signals, means for determining if a digitized signal is a vehicle electromagnetic signature signal, and means for calculating electromagnetic signature data of a vehicle from the digitized signal, and for sequencing and time-stamping each electromagnetic signature data point in synchronized and real-time manner. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 36)
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13. A method of processing vehicle electromagnetic signature signals, the method comprising:
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obtaining the electric magnetic signature signals from a roadbed electromagnetic loop, digitizing, sequencing and time-stamping the electromagnetic signature signals in a synchronized manner and in real time, and classifying vehicles into two or more silhouette categories (C1, . . . , C14) as a function of the vehicles'"'"' respective digitized, sequenced and time-stamped electromagnetic signatures. - View Dependent Claims (14, 15, 16, 17, 18, 35)
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19. A method of generating a program for classifying vehicles into two or more predetermined silhouette categories as a function of signals representative of electromagnetic signatures of the vehicles, the method comprising:
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processing the signals in the time domain to produce a first set of digitized data, processing the signals in the frequency domain to produce a second state of data containing the signal harmonic characteristics, making a first random selection of n data points from the data of the first and second sets, generating a first decision tree for classifying the vehicles into said predetermined categories as a function of the n data points obtained in the first random selection of data, making one or more second random selections of n data points from the data points of the first and second sets, and generating one or more second decision trees for classifying the vehicles into said predetermined categories as a function of the n data points obtained during the second random selection of data. - View Dependent Claims (20)
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Specification