Apparatus for predicting road shape

An apparatus for predicting road shape includes a map data reading unit, a clothoid curve calculating unit for calculating a clothoid curve corresponding to a corner area, and a fitting unit for adjusting the clothoid curve to the corner area. The clothoid curve calculating unit calculates a clothoi...

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Bibliographische Detailangaben
Hauptverfasser:	NIWA TOSHIAKI, SHIIMADO TOSHIHIRO
Format:	Patent
Sprache:	eng
Schlagworte:	ADVERTISING APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND,DEAF OR MUTE ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES AUXILIARY DRIVES FOR VEHICLES CONTROLLING CRYPTOGRAPHY DIAGRAMS DISPLAY EDUCATION EDUCATIONAL OR DEMONSTRATION APPLIANCES GLOBES GYROSCOPIC INSTRUMENTS INSTRUMENTATION OR DASHBOARDS FOR VEHICLES MEASURING MEASURING DISTANCES, LEVELS OR BEARINGS NAVIGATION PERFORMING OPERATIONS PHOTOGRAMMETRY OR VIDEOGRAMMETRY PHYSICS PLANETARIA REGULATING SEALS SIGNALLING SURVEYING SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES TESTING TRAFFIC CONTROL SYSTEMS TRANSPORTING VEHICLES IN GENERAL
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Beschreibung
Zusammenfassung:	An apparatus for predicting road shape includes a map data reading unit, a clothoid curve calculating unit for calculating a clothoid curve corresponding to a corner area, and a fitting unit for adjusting the clothoid curve to the corner area. The clothoid curve calculating unit calculates a clothoid curve by using X-coordinates and Y-coordinates which are found by expressions: x = X 0 + ∑ L ⁢ cos ⁢ ⁢ ϕ ( 1 ) and y = Y 0 + ∑ L ⁢ . sin ⁢ ⁢ ϕ , ( 2 ) wherein X0 and Y0 are coordinates at a start point of a clothoid curve, L is distance from the start point of the clothoid curve, phi is computed by equation (3) phi=alpha+2kL, wherein alpha is an angle for the start point of the clothoid curve and "k" is computed by equation (4) k =28/A2, wherein A is a clothoid coefficient.