Radar for use in vehicle
AssigneeDenso Corporation
InventorKazuhiko Yamaguchi
Life of this patent
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Abstract
A radar system for use in a vehicle includes a transmission function for transmitting a transmission wave at a predetermined interval, a redirection function having a plurality of redirection planes for redirecting the transmission wave at least twice in a successive manner in a same direction, a reception function for outputting a reception signal based on a reception of a reflected wave that corresponds to the transmission wave, and an integration function for outputting an integration signal upon integrating a plurality of the reception signals that correspond to the transmission waves redirected in the same direction.
Claims22
A radar system for use in a vehicle, said system comprising:
- a transmission means for transmitting a transmission wave at predetermined time intervals;
- a redirection means having a plurality of redirection planes for redirecting at least two successive transmissions of the transmission wave transmitted by the transmission means in a same direction without any intervening redirection in another direction;
- and
- a driving means for causing the redirection means to be rotated or translated at a constant speed to switch the plurality of redirection planes that are used for redirecting the transmission wave;
- wherein the transmission wave is redirected in the same direction through one of the plurality of redirection planes for a plurality of times when the redirection means is rotated or translated at a constant speed;
- a reception means for outputting a reception signal based on reception of a reflected wave that corresponds to a transmission wave;
- and
- an integration means for outputting an integrated signal upon integrating a plurality of said reception signals that correspond to said transmission waves at successive time intervals redirected in the same direction thereby enhancing the signal-to-noise ratio of the integrated signal.
A radar system for use in a vehicle, said system comprising:
- a transmission unit for transmitting a transmission wave at predetermined time intervals;
- a redirection unit having a plurality of redirection planes arranged at a same angle against an output direction of the transmission wave;
- a drive unit for causing the redirection means to be rotated or translated at a constant speed to switch the redirection planes in the output direction of the transmission wave wherein the transmission wave is redirected a plurality of times in the same direction through one of the redirection planes when the redirection unit is rotated or translated at a constant speed thereby to produce at least two successive transmissions in a common output direction without any intervening transmission in another output direction;
- a reception unit for outputting a reception signal based on reception of a reflected wave that corresponds to a transmission wave redirected by the redirection unit;
- and
- an integration unit for integrating plural of the reflected waves received by the reception unit respectively for each of the redirection planes thereby enhancing the signal-to-noise ratio of the integrated signal.
A method for enhancing a S/N ratio in a vehicular radar system, said method comprising:
- successively transmitting plural radiation beams from a vehicle at a common output direction to produce at least two successive transmissions in a common output direction without any intervening transmission in another output direction, said transmitting step including passing an outgoing transmission wave via plural redirection planes that are rotated or translated at a constant speed to thereby switch between the redirection planes and cause the transmission waves to be output at respectively corresponding different output directions, at least two successive transmissions being effected at each said output direction between switching thereof;
- receiving reflections at said vehicle of said plural transmitted radiation beams at corresponding successive time intervals and converting said reflections to plural corresponding correlated signals;
- and
- combining said plural corresponding correlated signals associated with a common output direction into an output vehicular radar signal having an enhanced signal-to-noise ratio as compared to an individual one of said corresponding signals.
Dependencies are inferred from the claim text.