×

DIRECTIONAL SPEED AND DISTANCE SENSOR

  • US 20150009049A1
  • Filed: 09/24/2014
  • Published: 01/08/2015
  • Est. Priority Date: 10/19/2011
  • Status: Active Grant
First Claim
Patent Images

1. A directional sensor for the purposes of detecting a presence of a vehicle or of an object within a zone of interest on a roadway or in a parking space, comprising:

  • a transmitter for transmitting a low power microwave transmit pulse such that the effective pulse width is less than 10 ns;

    a directional antenna system to enable the transmit pulse to be radiated preferentially towards a detection area;

    an adjustable receive window to receive reflected, scattered, and bounced signals of transmit pulses, the adjustable receive window being adjustable in relation to the transmit pulse;

    an integrator that performs one or more of integrating and combining signals from multiple received pulses to increase a signal to noise ratio;

    a digitizer that digitizes the combined signal from the integrator using an analog to digital conversion process;

    a module for comparing the digitized signal to at least one of preset and dynamically computed threshold values to determine the presence or absence of an object in the field of view of the sensor; and

    at least one pulse generator capable of generating at least one pulse with rise and fall times of less than 3 ns each or less than 10 ns in duration for controlling the transmit pulses and receive windows.

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