Denso Corporation

Naohito Takasuka

Takatoshi Sekizawa

Yoichiro Suzuki

Junichiro Funabashi

Kenichiro Sanji

Kazumasa Sakurai

Kenichirou Sanji

Youichiro Suzuki

Airi Yoshida

A distance estimation device includes a mobile terminal transmitting a radio wave and an in-vehicle device. The in-vehicle device includes a direction determination unit having a receiver, a distance measurement unit, and a correction unit. The receiver receives the radio wave and is arranged on a side of the vehicle. The direction determination unit determines a direction from which the radio wave comes based on a signal strength of the received radio wave. The distance measurement unit receives the radio wave and measures a distance from an installation position of the distance measurement unit to the mobile terminal based on information other than a signal strength of the received radio wave. The correction unit corrects the measured distance to be a distance from an edge of the vehicle to the mobile terminal based on the determined direction and the installation position.

Distance estimation device and distance estimation system

A driving control device is configured to control driving of occupant protection devices to be mounted on a vehicle. The driving control device includes a detection result acquisition unit, a collision form estimation unit, and a device selection unit. The detection result acquisition unit acquires a detection result of an object ahead of the vehicle before collision. The collision form estimation unit estimates a form of collision that may occur with the object based on the detection result. When a collision between the vehicle and the object is detected, the device selection unit selects which of the occupant protection devices should be driven based on the collision form estimated by the collision form estimation unit.

Driving control device

A tire system is configured to enable a general-purpose communication device to establish data communication with a tire-side device, thereby enabling transmission of data indicating a tire-related condition from the tire-side device to the general-purpose communication device. The general-purpose communication device acquires the tire-related condition, and reports the tire-related condition to the user via a notification unit. Based on the above, it is possible to report the tire-related condition via the general-purpose communication device based on the communication between the general-purpose communication device and the tire-side device.

Tire system

A collision detection unit corrects a threshold value to a larger value, which a collision check unit uses to compare an output value of a collision detection unit, in case of a rough road surface than in case of a flat road surface. Thus, it becomes possible to suppress erroneous detection on the rough road surface while detecting a collision sensitively on a flat road surface. The rough road is detected by a vibration detection unit provided in a tire side device.

Collision detecting device

A vehicle body side system is provided with a second data communication unit that performs bidirectional communication with a tire side device and receives road surface data and measurement data transmitted from a first data communication unit, a road surface determination unit that determines the road surface condition of a road surface on which a vehicle travels based on the road surface data, a reception strength measurement unit that measures the reception strength of the measurement data, and a transmission angle setting unit that stores the reception strength of the measurement data during one rotation of a tire, sets as a transmission angle, a presence angle when the reception strength of the measurement data during one rotation of the tire is high, and transmits data indicating the transmission angle to the tire side device via the second data communication unit. In addition, a control unit causes the first data communication unit to transmit the road surface data when the presence angle becomes the transmission angle.

Road surface condition determination device

A vehicle-mounted device includes an interference determination unit and a sensor control unit. The interference determination unit determines whether an interference state where a first electromagnetic wave ranging sensor equipped to a first vehicle may receive a second transmission wave transmitted from a second electromagnetic wave sensor equipped to a second vehicle is present, based on transmission time frame information received by a first wireless communication device equipped to the first vehicle, and reception duration information indicating a reception duration during which a first electromagnetic wave ranging sensor equipped to the first vehicle may receive a first reflected wave. The sensor control unit controls transmission timing for transmitting the first transmission wave from the first electromagnetic wave ranging sensor and a reception duration, and changes the transmission timing and the reception duration to avoid the interference state, when the interference determination unit determines that the interference state is present.

Vehicle-mounted device and vehicle-mounted ranging system

An in-vehicle apparatus installed in a first vehicle. The in-vehicle apparatus includes a first distance sensor measuring a distance to an object based on time to receive a reflection wave of an electro-magnetic transmission wave from the object after a transmission of the electro-magnetic transmission wave, with the first distance sensor being an electro-magnetic wave sensor. The in-vehicle apparatus also includes an inclination angle sensor that senses a first vehicle inclination angle representative of an inclination angle of the first vehicle that includes the first distance sensor, a radio communicator that receives a second vehicle inclination angle transmitted from a second vehicle that leads the first vehicle, an angle difference calculator that calculates an angle difference between the first vehicle inclination angle and the second vehicle inclination angle, and a processor that performs a preset operation based on the distance measured by the first distance sensor.

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Nisshin, Japan

Naohito Takasuka