JPS641992A - Radar for measuring distance between vehicles - Google Patents
Radar for measuring distance between vehiclesInfo
- 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
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
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)
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)
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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