Vehicle classification system using a passive audio input to a neural network
US5619616A · kind A · utility
26Cited by
11References
22Claims
0Family size
Assignee
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Key dates
| Filing date | Apr 25, 1994 |
| Grant date | Apr 8, 1997 |
| Priority date | — |
| Expiry date | Apr 25, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2218/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system for classifying vehicles based on the sound waved produced by the vehicles receives analog sound pressure levels and converts them to a power spectrum. Fuzzification functions, such as asymmetric wedge shaped functions, are convoluted with the power spectrum to create a vector that characterizes the power spectrum while reducing the dimensionality of the characterizing vector. A neural network analyzes the characterizing vector and produces a classification designator indicative of the class of the object associated with the analog sound pressure levels received by the system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.