Denso Corporation

Toyota Jidosha Kabushiki Kaisha

Aisin Aw Co., Ltd.

Yuya Higuchi

Masatoshi Takahara

Kiyoshi Tsurumi

Yuusuke Watanabe

Shogo Sugimoto

Motohiro Nakamura

Tomoki Kodan

Kuniaki Tanaka

Naoto Miura

Suguru Hochi

Katsuhiko Muto

In an apparatus for calibrating an inertial sensor configured to detect an angular velocity of a vehicle, an angular velocity estimator is configured to estimate a value for an angular velocity of the vehicle based on a value for an attitude of the vehicle and a value for a change in attitude of the vehicle estimated by the attitude estimator, and an error estimator is configured to estimate a value for an angular velocity error that is an error between the value for the angular velocity of the vehicle estimated by the angular velocity estimator and the value for the angular velocity of the vehicle detected by the inertial sensor. A calibrator is configured to calibrate the value for the angular velocity of the vehicle detected by the inertial sensor based on the value for the angular velocity error estimated by the error estimator.

Apparatus and method for calibrating inertial sensor

A vehicle trajectory calculation method is provided. In the vehicle trajectory calculation method, a travel trajectory of a vehicle in a travel route is calculated based on a GPS signal received at predetermined time intervals with a GPS receiver of the vehicle during traveling. When there is an unmeasurable section where the travel trajectory cannot be normally calculated based on the GPS signal, the travel trajectory in the unmeasurable section is calculating by performing an interpolation based on the calculated travel trajectories in sections anterior to and posterior to the unmeasurable section.

Vehicle trajectory calculation method

A vehicle drive assist system includes: a position detection device that detects a position of a vehicle; a map data acquisition device that acquires map data; a map matching device that determines the position of the vehicle on a road based on a detected position and the map data; an assist device that assists a driver's operation based on a determined position of the vehicle and a road shape ahead of the vehicle in a traveling direction indicated on the map data; a determination device that determines a possibility that the vehicle travels a wrong way on a road where the traveling direction is fixed to one way; and a cancel device that cancels drive assist when a possibility of reverse run exists.

Vehicle drive assist system, and drive assist implementation method

In this vehicle orientation detection method detecting the orientation of a vehicle on the basis of measurement data obtained at prescribed time intervals, as long as a speed sensed by a vehicle speed sensor is less than a threshold speed, the vehicle orientation is detected on the basis of a yaw rate sensed by a yaw rate sensor. If the speed detected by the vehicle speed sensor is greater than or equal to the threshold speed, a drift determination is performed. If not determined to be in a drift state, the vehicle orientation is detected on the basis of signals received by a GPS receiver, and if determined to be in a drift state, the vehicle orientation is detected on the basis of the yaw rate sensed by the yaw rate sensor.

Vehicle orientation detection method and vehicle orientation detection apparatus

Various sensors, such as a GPS and a vehicle speed sensor, are used to detect a current position and direction of a vehicle. A normal running direction, which is a running direction specified for a road on which the vehicle runs, is acquired. In a state where a vehicle speed pulse is acquired at the predetermined intervals, it is detected whether the vehicle is placed in a wrong-way driving situation on the basis of the detected current direction of the vehicle and the normal running direction; whereas, in a state where a vehicle speed pulse is not acquired, it is not detected whether the vehicle is placed in the wrong-way driving situation on the basis of the detected current direction of the vehicle.

Driving support system, driving support method and computer program

A driving support device includes: a position detector; a traveling direction detector; a map data memory; a map matching element for matching a current position of a vehicle on a road of map data; a traveling segment estimation element for estimating a current segment of the vehicle in the parking place road when a matched road is the parking place road; a main road search element for determining whether a segment of a main road of an express way is disposed in a predetermined search distance from an estimated current segment; and a reverse run determination element for determining whether the vehicle travels reversely when the main road search element determines that the segment of the main road is disposed in the predetermined search distance from the estimated current segment.

Growing community of inventors

Chiryu, Japan

Yuya Higuchi