FIELD: the invention refers to control-measuring technique and may be used by the Road-Patrol Service.
SUBSTANCE: the acoustic mode of definition of the speed of the movement of an automobile in conditions of bad visibility is in picking out a tone component out of the spectrum of the noise emitted by automobiles and changes of Doppler frequency in time of this tone component are measured. According to the changed meanings of Doppler frequency the speed of the automobile is defined and also the time of passing of the automobile past the station of the Road-Patrol Service and the number of the road stripe.
EFFECT: provides possibility of definition and control of kinematic characteristics of automobiles on multi-stripe route in conditions of bad visibility.
2 dwg
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