×

Device and process for detecting the presence of a vehicle by means of an ultrasonic device

  • US 5,263,006 A
  • Filed: 07/07/1992
  • Issued: 11/16/1993
  • Est. Priority Date: 01/12/1990
  • Status: Expired due to Fees
First Claim
Patent Images

1. A device for detecting the presence of a vehicle that is situated on a traffic lane has an ultrasonic device that (a) is mounted to the side of the traffic lane, (b) has a housing in which at least three ultrasonic transducers are arranged and (c) includes an electronic transmitting and receiving circuit that is associated with the said at least three ultrasonic transducers wherein one of the said at least three ultrasonic transducers is mounted centrally in the housing and the other ultrasonic transducers of the said at least three ultrasonic transducers are arranged equidistant and in a distance from the centrally mounted ultrasonic transducer and are electrically interconnected in a configuration which is one of a serial and a parallel connection, with the centrally mounted ultrasonic transducer being operated as a transmitter and emitting periodical ultrasonic pulses whose reflections are received by the said other ultrasonic transducers, which are operated as receivers, and the electronic transmitting and receiving circuit issues a positive presence signal if reflections occur within an area whose extent is determined by the width of the traffic lane and if at least one of the said other ultrasonic transducers picks up these reflections.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×