Yazaki Corporation

Eita Itou

Ryohei Nishizaki

Kunihiko Yamada

You Yanagida

Kenji Matsushita

Naoki Sagane

Yoshikazu Nagashima

Takahiro Iwaki

Tatsuo Toba

Kentaro Kobayashi

In a vehicle communication device, a vehicle-to-vehicle communication unit receives from an other-vehicle in real time, complementary information that includes AP information that the other-vehicle cannot receive from an access point at a traveling position of the other-vehicle, the AP information being information possessed by another other-vehicle and that cannot be directly received by the vehicle-to-vehicle communication unit. Based on the complementary information received from the other-vehicle at a specific time, a controller creates complemented own-vehicle AP integrated information in which AP information that is included in an integrated range and is different from the AP information of own-vehicle AP integrated information at the specific time, is complemented. The vehicle-to-vehicle communication unit transmits the complemented own-vehicle AP integrated information at the specific time created by the controller to the other-vehicle in vicinity in real time.

Vehicle communication device and vehicle communication system

A vehicle communication device includes a vehicle-to-vehicle communication unit, an information extraction unit, and a Wi-Fi module. The vehicle-to-vehicle communication unit is mounted on an own vehicle and receives AP information required for wireless connection to an access point for communication relay from another vehicle in the vicinity. The information extraction unit extracts, from vehicle-to-vehicle AP information, which is AP information received from the other vehicle in the vicinity by the vehicle-to-vehicle communication unit, connected AP information, which is AP information received from the other vehicle in front in a traveling direction of the own vehicle and AP information of the access point to which the other vehicle in front is being connected. The Wi-Fi module wirelessly connects to the access point based on the connected AP information extracted by the information extraction unit.

Vehicle communication device

A vehicle communication system includes an in-vehicle router. The in-vehicle router includes a Wi-Fi module, a GPS, a vehicle speed acquirer, and an in-vehicle CPU. The Wi-Fi module is a module mounted on a vehicle and provided connectable to an access point of a wireless LAN. The GPS acquires vehicle position information indicating the position of the vehicle. The vehicle speed acquirer acquires vehicle speed information indicating the speed of the vehicle. The in-vehicle CPU determines the access point to be connected to the Wi-Fi module based on the vehicle position information and the vehicle speed information.

Vehicle communication system

An antenna unit includes a patch antenna and a case. The patch antenna includes a conductive antenna pattern and an antenna ground pattern that functions as ground of the antenna pattern and receives an electric wave. The case has dielectricity, the case being provided with the patch antenna. The antenna pattern is provided on an inner wall surface of a wall portion of the case. The antenna ground pattern is provided on an outer wall surface of a wall portion of the case and is positioned so as to face the antenna pattern.

Antenna unit

A film antenna includes a sheet-shaped resin film; an antenna pattern; a power feed pattern; and a ground pattern. The antenna pattern is formed on a front face of the resin film and used for transmission and reception of a signal. The power feed pattern is formed on the front face of the resin film, connected with the antenna pattern, and used for transmission of an electric signal. The ground pattern is electrically conductive and formed on a back face of the resin film.

Film antenna

In an in-vehicle router, a narrow-range communication module (A) is a device capable of wireless communication. A wide-range communication module is a device capable of wireless communication in the wider range than the narrow-range communication module. An Ethernet module is connected to an in-vehicle LAN in a vehicle so that communication is possible. A CPU controls the narrow-range communication module and the wide-range communication module and communicates with the in-vehicle LAN through the Ethernet module. The narrow-range communication module, the wide-range communication module, the Ethernet module, and the CPU are assembled to a housing, and the housing is provided to the vehicle.

Wireless communication device

A vehicle communication system includes a management server and an in-vehicle communication device. The management server manages the plurality of access points for communication relay. The in-vehicle communication device is mounted on a vehicle and is capable of wireless communication to the access point. The in-vehicle communication device transmits position information indicating a traveling position of the vehicle to the management server. The management server transmits, to the in-vehicle communication device, access point information in which the priority is set on one or more candidate access points selected from among the plurality of access points based on the position information transmitted from the in-vehicle communication device. The in-vehicle communication device connects to an access point determined from among the candidate access points based on the priority in the access point information transmitted from the management server.

In an antenna, the outer conductor is formed of a first linear conductor, the first linear conductor having a length corresponding to one wavelength of a right-handed circularly polarized wave and circularly extended from a first feed point to a second feed point. The inner conductor is disposed inside the outer conductor and formed of a second linear conductor, the second linear conductor being different from the first linear conductor and having a length determined based on one wavelength of a left-handed circularly polarized wave. The inner conductor has a starting point of the second linear conductor connected to the first feed point and has an end point of the second linear conductor kept free from connection at a location inside the outer conductor, and causes current to flow in a direction opposite to the current flow in the outer conductor.

Antenna

A noise filter includes: a capacitor-side accommodating body including capacitors, a grounding conductor connected to one electric connector, and conductors connected to the other electric connector; an inductor-side accommodating body including inductors and conductors connected to the inductors; an accommodating body connecting structure that connects the capacitor-side accommodating body to the inductor-side accommodating body by engaging a holding groove with a protrusion; a terminal connecting structure that electrically connects the capacitors to the inductors, and connects the capacitor-side accommodating body to the inductor-side accommodating body by connecting one terminal connector of a connection terminal fitting to a terminal connector of a capacitor-side conductor, and connecting the other terminal connector of the connection terminal fitting to a terminal connector of an inductor-side conductor.

Growing community of inventors

Shizuoka, Japan

Eita Itou