Process and apparatus for monitoring a vehicle interior
First Claim
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1. A process for monitoring an interior of a vehicle against an incursion, said process comprising:
- (a) detecting a sound wave in an interior of a vehicle;
(b) generating a time-dependent electrical measurement signal representing the detected sound wave;
(c) amplifying said time-dependent electrical measurement signal;
(d) feeding the amplified time-dependent electrical measurement signal to a computer and in said computer decomposing said amplified time-dependent electrical measurement signals into discrete measured-value signals and storing said discrete measured-value signals as respective individual vectors in a memory of said computer;
(e) applying each said vectors to an input of a neural network formed by said computer and processing said vector in said neural network by comparison with at least one sample vector to form a correlation parameter representing similarity of a measured-value signal vector and a sample vector; and
(f) activating an alarm device by said neural network in dependence upon said correlation parameter.
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Abstract
A monitoring of a vehicle interior is effected by detecting sound waves in a vehicle interior, either from an incursion source or as reflected as echo waves and decomposing the electrical signals representing those detected sound waves into measurement vectors which are compared with sample vectors in a neural network so that a correlation parameter is generated which triggers an alarm when the correlation parameter indicates incursion. The system can respond first to glass breakage before an echo system is used to then further establish the nature of the incursion.
34 Citations
18 Claims
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1. A process for monitoring an interior of a vehicle against an incursion, said process comprising:
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(a) detecting a sound wave in an interior of a vehicle; (b) generating a time-dependent electrical measurement signal representing the detected sound wave; (c) amplifying said time-dependent electrical measurement signal; (d) feeding the amplified time-dependent electrical measurement signal to a computer and in said computer decomposing said amplified time-dependent electrical measurement signals into discrete measured-value signals and storing said discrete measured-value signals as respective individual vectors in a memory of said computer; (e) applying each said vectors to an input of a neural network formed by said computer and processing said vector in said neural network by comparison with at least one sample vector to form a correlation parameter representing similarity of a measured-value signal vector and a sample vector; and (f) activating an alarm device by said neural network in dependence upon said correlation parameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An apparatus for monitoring an interior of a vehicle against an incursion, comprising:
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at least one detector in an interior of said vehicle for detecting a sound wave in said interior of said vehicle and generating a time-dependent electrical measurement signal representing the detected sound wave; an amplifier connected to said detector for amplifying said time-dependent electrical measurement signal; a computer connected to said amplifier and fed with the amplified time-dependent electrical measurement signal for decomposing said amplified time-dependent electrical measurement signals into discrete measured-value signals and storing said discrete measured-value signals as respective individual measurement vectors in a memory of said computer, said computer forming a neural network to inputs of which each of said vectors is applied for processing of said measurement vectors in said neural network by comparison with at least one sample vector to form a correlation parameter representing similarity of a measurement vector and a sample vector; and an alarm device connected to said computer and activated by said neural network in dependence upon said correlation parameter. - View Dependent Claims (15, 16, 17, 18)
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Specification