JPS641992A - Radar for measuring distance between vehicles - Google Patents

Radar for measuring distance between vehicles

Info

Publication number
JPS641992A
JPS641992A JP62156979A JP15697987A JPS641992A JP S641992 A JPS641992 A JP S641992A JP 62156979 A JP62156979 A JP 62156979A JP 15697987 A JP15697987 A JP 15697987A JP S641992 A JPS641992 A JP S641992A
Authority
JP
Japan
Prior art keywords
distance
antenna
radar
vehicles
forward vehicle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP62156979A
Other languages
Japanese (ja)
Other versions
JPH011992A (en
Inventor
Motonobu Kato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP62-156979A priority Critical patent/JPH011992A/en
Priority claimed from JP62-156979A external-priority patent/JPH011992A/en
Publication of JPS641992A publication Critical patent/JPS641992A/en
Publication of JPH011992A publication Critical patent/JPH011992A/en
Pending legal-status Critical Current

Links

Landscapes

  • Radar Systems Or Details Thereof (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

PURPOSE: To measure a distance to the forward vehicle continuously by a method wherein the spread angle of the beam of an antenna is adjusted in accordance with the spread angle of an area wherein the distance is to be measured, so as to hold the forward vehicle in the range of the beam of the antenna.
CONSTITUTION: In a radar for measuring a distance between vehicles, which is provided on a vehicle 1b located on a track 3b having a small radius of curvature, the beam width of an antenna 2b is made larger than a directional angle θ1 to be a directional angle θ2. Then the forward vehicle 1a does not depart from the beam range of the antenna 2b. Thereby the measurement of the distance to the forward vehicle 1a is conducted continuously.
COPYRIGHT: (C)1989,JPO&Japio
JP62-156979A 1987-06-23 Inter-vehicle distance measurement radar Pending JPH011992A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62-156979A JPH011992A (en) 1987-06-23 Inter-vehicle distance measurement radar

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62-156979A JPH011992A (en) 1987-06-23 Inter-vehicle distance measurement radar

Publications (2)

Publication Number Publication Date
JPS641992A true JPS641992A (en) 1989-01-06
JPH011992A JPH011992A (en) 1989-01-06

Family

ID=

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5642439A (en) * 1992-08-10 1997-06-24 Ricoh Company, Ltd. Digital image processing method suitable for halftone representation based on dither process

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5642439A (en) * 1992-08-10 1997-06-24 Ricoh Company, Ltd. Digital image processing method suitable for halftone representation based on dither process

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