Classifications

• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
  • G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
  • G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
  • G01S3/14—Systems for determining direction or deviation from predetermined direction
  • G01S3/16—Systems for determining direction or deviation from predetermined direction using amplitude comparison of signals derived sequentially from receiving antennas or antenna systems having differently-oriented directivity characteristics or from an antenna system having periodically-varied orientation of directivity characteristic
  • G01S3/18—Systems for determining direction or deviation from predetermined direction using amplitude comparison of signals derived sequentially from receiving antennas or antenna systems having differently-oriented directivity characteristics or from an antenna system having periodically-varied orientation of directivity characteristic derived directly from separate directional antennas

Definitions

• This invention is an electronic signalling device which enables taxi drivers to be alerted to the presence of a passenger on the street.
• an electronic taxi passenger signal receiving device vehicle mounted, comprising a unit which receives a radio frequency signal, emitted by a would be passenger using a hand held radio transmitter, via an antenna array of several dipoles set geometrically opposed, each dipole wired to a corresponding L.E.D. displayed on the units face, and cabled to the devices discriminating circuitry which will determine which dipole received the signal first and illuminate this antenna dipoles' corresponding L.E.D. to indicate to the driver the direction from which the signal was received, whilst simultaneously triggering an audible tone alerting the driver to the presence of the would be passenger.
• an antenna with four dipoles is used, each dipoles corresponding L.E.D. being positioned on the units face to show a NW, NE, SW, SE configuration, thus when the radio frequency signal sent by a would be passenger is received and the taxi driver is alerted by the sound tone he can observe which L.E.D. is illuminated on the unit and determine from this whether the would be passenger is positioned to the front left or right or back left or right of the taxi vehicle.
• the signal receiving device is installed on the dash board of a taxi cab in an upright position within direct eyeline of the driver.
• the dominant features on the surface of the unit, facing the driver, are several L.E.D.'s set in a geometrically opposed configuration.
• the antenna comprises several dipoles set geometrically opposed and each dipole wired to a corresponding L.E.D. displayed on the units face, and cabled to the units discrimatory circuitry.
• the units antenna receives the signal.
• the decoded signal simultaneously triggers an audible tone and illuminates the L.E.D. on the units face corresponding to the dipole. This will indicate the direction from which the signal was received.
• the driver can then note the location of the would be passenger, relative to his taxi, by observing the position of the illuminated L.E.D. on the units face. The driver can then stop the vehicle in an appropriate position to collect the prospective passenger.
• the driver of a taxi will be assured of being alerted to the presence of a would be passenger who is signalling the taxi.
• the taxi passenger signal receiver according to this invention is not restricted to the use of an antenna with several dipoles but can be constructed using a single dipole if only the existence of a prospective passenger and not their position, relative to the taxi, is required.

Landscapes

• Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• General Physics & Mathematics (AREA)
• Radar, Positioning & Navigation (AREA)
• Remote Sensing (AREA)
• Emergency Alarm Devices (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=3762050

Family Applications (1)

Country Status (2)

Cited By (1)

Citations (5)

Family Cites Families (2)

• 1991
  • 1991-09-27 AU AU84803/91A patent/AU623331B3/en not_active Ceased
• 1992
  • 1992-09-04 WO PCT/AU1992/000469 patent/WO1993006501A1/en active Application Filing

Patent Citations (5)

Non-Patent Citations (1)

Also Published As

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