Title:
FORWARD PRECAUTION RADAR FOR VEHICLE
Document Type and Number:
Japanese Patent JP3208229
Kind Code:
B2
Abstract:
PURPOSE: To provide a precaution radar for vehicle in which the tracking is conducted by detecting the rough distance to an obstacle and a transition of tracking is made quickly to a new obstacle is the new obstacle is detected at a distance closer than the old obstacle by searching.
CONSTITUTION: A transmission antenna 13 transmits a signal forward. A searching channel 3 searches the receiving signal from a receiver 22 for the reflection wave from an obstacle under control of a control operating unit 51. Rough distance between a vehicle and obstacle is also obtained based on the time lag of reflection signal behind the transmission signal by searching within a predetermined range. When the rough distance is obtained, the control operating unit 51 controls the searching channel 3 to repeat searching while setting a searching range within the rough distance when viewed from the vehicle. At the same time, a tracking channel 4 tracks the reflection signal from the obstacle based on the rough distance thus obtained and detects the precise distance between the vehicle and the obstacle.
More Like This:
| JP2005525564 | Methods and equipment for accurate phase detection |
| JPH04274786 | PULSED RADAR APPARATUS |
| JP3788157 | RADAR SIGNAL PROCESSOR |
Inventors:
Chogo Sekine
Application Number:
JP15562793A
Publication Date:
September 10, 2001
Filing Date:
June 25, 1993
Export Citation:
Assignee:
Japan Radio Co., Ltd.
International Classes:
G01S13/28; B60W30/00; G01S13/66; G01S13/93; G08G1/16; (IPC1-7): G01S13/93; G01S13/28; G01S13/66; G08G1/16
Domestic Patent References:
| JP593776A | ||||
| JP6225276A | ||||
| JP3282284A | ||||
| JP2201286A | ||||
| JP5256936A | ||||
| JP161686U |
Attorney, Agent or Firm:
Kenji Yoshida (2 outside)