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US 6,445,338 B1Granted
Detecting apparatus of vehicle speed
AssigneeSony Corporation
InventorMasashi Ohkubo
Life of this patent
Estimating the term…
Abstract
A detecting apparatus of vehicle speed including detecting means for emitting an electromagnetic wave or an ultrasonic wave to a road surface and detecting traveling speed of a vehicle from the Doppler effect produced in a reflected wave thereof, a transmitting circuit for sending information about the traveling speed detected by the detecting means by radio, a power generation mechanism for generating power by vibration produced in the vehicle, and a charging circuit for charging a charging type battery by an output voltage of the power generation mechanism.
Claims4
A detecting apparatus of vehicle speed comprising:
- detecting means for emitting an electromagnetic wave or an ultrasonic wave to a road surface and detecting traveling speed of a vehicle from the Doppler effect produced in a reflected wave thereof;
- a transmitting circuit for sending information about the traveling speed detected by the detecting means by radio;
- a power generation mechanism for generating power by vibration produced in said vehicle;
- and
- a charging circuit for charging a charging type battery by an output voltage of the power generation mechanism.
2 more elements
Dependencies are inferred from the claim text.