Communications: electrical – Land vehicle alarms or indicators – Of collision or contact with external object
Patent
1997-08-28
2000-06-27
Pope, Daryl
Communications: electrical
Land vehicle alarms or indicators
Of collision or contact with external object
340904, 340435, 340942, 180168, 180169, B60Q 100
Patent
active
060811870
ABSTRACT:
A system which accurately detects a position of a vehicle on a road regardless of weather is disclosed. Radio wave reflecting bodies are placed on a road, and transmitter-receiver which can transmit and receive radio waves of wavelength is longer than a millimeter are placed on a vehicle. Based on a ratio of reception strength of the transmitter-receiver in the right and left of the vehicle, a displacement of the vehicle relative to the radio wave reflecting body is detected. The radio wave reflecting bodies have apertures or notches in a predetermined interval so that the radio wave signals reflected thereby has periodicity, and can be distinguished from other objects on the road.
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Pope Daryl
Toyota Jidosha & Kabushiki Kaisha
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