Gate for radar-mounted vehicle, having partition walls not grouped or detected by radar apparatus

• US 6,339,392 B1
• Filed: 12/14/1999
• Issued: 01/15/2002
• Est. Priority Date: 01/13/1999
• Status: Expired due to Fees

• Current Assignee: Honda Giken Kogyo Kabushiki Kaisha (Honda Motor Company)
• Original Assignee: Honda Giken Kogyo Kabushiki Kaisha (Honda Motor Company)
• Inventors: Ashihara, Jun
• Primary Examiner(s): Sotomayor, John B.
• Application Number:
  US09/460,424
• Time in Patent Office: 763 Days
• Field of Search: 342/1, 342/2, 342/3, 342/4
• US Class Current: 342/1
• CPC Class Codes: G01S 13/931 of land vehicles
• CPC Class Codes: G01S 2013/9324 Alternative operation using ultrasonic waves

Abstract

A gate such as a tollgate in an expressway for radar-mounted vehicles is disclosed, by which an erroneous operation of the mounted radar apparatus can be prevented and through which the radar-mounted vehicles can smoothly pass. The gate includes two partition walls which limit a passage. The positions of the front ends of the partition walls are separated in front and behind, or the front end of one or both of the partition walls has a structure for suppressing the frontward reflection of each radiated electric, optical, or acoustic beam incident on the relevant front end.

Claims

1. A gate having a passage through which a radar-mounted vehicle passes, the vehicle having a radar apparatus which radiates electric, optical, or acoustic beams in a plurality of directions and receives reflected waves from an object so as to detect the object which generates the reflected waves, and the gate comprising:

two partition walls which limit the passage, the front ends of the partition walls being separately positioned along the direction of the passage.

2. A gate having a passage through which a radar-mounted vehicle passes, the vehicle having a radar apparatus which radiates electric, optical, or acoustic beams in a plurality of directions and receives reflected waves from an object so as to detect the object which generates the reflected waves, and the gate comprising:

two partition walls which limit the passage, the front end of only one of the partition walls having a structure for suppressing the frontward reflection of each incident radiated beam.

3. A gate as claimed in claim 2, wherein the structure of the front end for suppressing the frontward reflection of the beam is made by covering the front end with a material for absorbing the beam.

4. A gate as claimed in claim 2, wherein the structure of the front end for suppressing the frontward reflection of the beam is made by inclining the front face of the front end in a manner such that the height of the relevant portion gradually decreases frontward.

5. A gate as claimed in claim 2, wherein the structure of the front end for suppressing the frontward reflection of the beam is made by forming a concavoconvex pattern on the front end so as to disperse the reflective directions of the incident beams.

6. A gate having a passage through which a radar-mounted vehicle passes, the vehicle having a radar apparatus which radiates electric, optical, or acoustic beams in a plurality of directions and receives reflected waves from an object so as to detect the object which generates the reflected waves, and the gate comprising:

two partition walls which limit the passage, the front ends of the partition walls having a structure for suppressing the frontward reflection of each incident radiated beam.

7. A gate as claimed in claim 6, wherein the structure of each front end for suppressing the frontward reflection of the beam is made by covering the front end with a material for absorbing the beam.

8. A gate as claimed in claim 6, wherein the structure of each front end for suppressing the frontward reflection of the beam is made by inclining the front face of the front end in a manner such that the height of the relevant portion gradually decreases frontward.

9. A gate as claimed in claim 6, wherein the structure of each front end for suppressing the frontward reflection of the beam is made by forming a concavoconvex pattern on the front end so as to disperse the reflective directions of the incident beams.