Title:
DETECTION ABNORMALITY JUDGEMENT METHOD IN DISTANCE SENSOR FOR VEHICLE
Document Type and Number:
Japanese Patent JP3400311
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To quickly detect the deterioration of the receiving environment of a reflection signal from a preceding vehicle in auto-cruising controlling so as to keep the vehicle interval distance constant by detecting a vehicle interval distance with a preceding vehicle by a distance sensor composed of a laser radar.
SOLUTION: Standard deviation (or dispersion) and average value of the receiving light quantity are calculated on the basis of data accumulating a receiving light quantity detected by a distance sensor 81 over a prescribed time, when the distance sensor 87 does not receive a reflection signal, and it is judged that the receiving environment of the reflection signal from the preceding vehicle is deteriorated, if the standard deviation is equal to or larger than a reference value, or if the average value is equal to or smaller than the reference value. Auto-cruising controlling is stopped and deterioration of the receiving environment is informed to a driver by an information means 7.
Inventors:
Kazuo Yamashita
Akira Sugiyama
Shigenori Ogino
Akira Sugiyama
Shigenori Ogino
Application Number:
JP25449297A
Publication Date:
April 28, 2003
Filing Date:
September 19, 1997
Export Citation:
Assignee:
Honda motor industry stock company
International Classes:
B60R21/00; G01S17/931; B60T7/22; B60W30/00; G01C3/08; G01S7/497; G08G1/16; (IPC1-7): G01S17/10; B60R21/00; G01S17/93; G08G1/16
Domestic Patent References:
| JP489590A | ||||
| JP434386A | ||||
| JP6053869A |
Attorney, Agent or Firm:
Ken Ochiai (1 person outside)