VEHICLE CIRCUMFERENCE DETECTING DEVICE

• Main Authors: AKASU MASAHEI, NISHIDA MINORU, KANEKO KAZUMA, OKAMURA MOICHI
• Format: Patent
• Language: English
• Published: 07.02.1997
• Edition: 6
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

PROBLEM TO BE SOLVED: To accurately discriminate between a static target such as a reflector and a moving target such as a vehicle when a vehicle is running on a curved road. SOLUTION: Assuming that a target corresponding to a first detection point disposed on a two-dimensional coordinates by a coordinate conversion means 2 is a static one, a prediction point at the next measuring time is calculated from a speed of a vehicle itself, variation of angle due to the rotation of the vehicle itself and a measuring time interval by means of a prediction position calculating means 14. A prediction range is set by referring to the prediction point by means of a prediction range setting means 7. When a second detection point exists within the prediction range, it is judged that a target corresponding to the second detection point is a static target by means of a static target judging means 8.