Denso Corporation

Denso Corpora Tion

Toyota Jidosha Kabushiki Kaisha

Nippon Soken, Inc.

Koji Sakamoto

Takashi Saitou

Tetsuya Kusumoto

Takahisa Matsumoto

Masashi Mori

Tomoyuki Funayama

Kenichiro Sanji

Shigeki Nishiyama

Munenori Matsumoto

Kenji Katou

Yuki Tokunaga

A vehicle authentication apparatus includes first and second communication devices, first and second area determination devices, and a control execution device. The first communication device specifies a first area as a communication area. The second communication device specifies a second area as the communication area. The first area determination device determines whether the mobile devices are present at the first area based on a communication status of the first communication device with the mobile devices. The second area determination device determines whether at least one of mobile devices is present at the second area based on a communication status of the second communication device with the mobile devices. The control execution device executes predetermined vehicle control in response to determining no mobile devices being present at the first area; and determining at least one of the mobile devices being present at the second area.

Vehicle authentication apparatus

An occupant detection system includes a transmitter provided adjacent to a first side face of a vehicle before a predetermined seat and successively transmitting a radio wave over a range covering a seat door located on a second side face of the vehicle and in a same row as the predetermined seat, a receiver provided adjacent to the second side face behind the predetermined seat and receiving the radio wave transmitted from the transmitter, and an occupant detection device including a reception intensity acquirer, an occupant detector, an opening and closing detector. The reception intensity acquirer successively acquires a reception intensity of a radio wave successively received by the receiver. The occupant detector detects an occupant in the vehicle according to the reception intensity of the radio wave received by the receiver while the opening and closing detector detects that the seat door is open.

Occupant detection system and occupant detection device

A detection apparatus includes: a transmitter transmitting an electric wave toward an inside of a vehicle; a receiver receiving the transmitted electric wave each time the transmitter transmits the electric wave, and performing output in accordance with reception strength of the received electric wave; and a determination portion, based on the reception strength of the electric wave received by the receiver, comparing a change mode of the electric wave received by the receiver changing over time to a predetermined reference mode and determining whether a person is present between the receiver and the transmitter.

Detection apparatus

A mobile device position estimation system includes: a vehicular system having a vehicle side transmitter transmitting an impulse signal, a vehicle side receiver receiving a response signal, and a vehicle side control unit outputting a transmission command signal of the impulse signal and receiving a notification signal of the response signal; and a mobile device having a mobile device side receiver receiving the impulse signal and a mobile device side transmitter transmitting the response signal. The vehicle side control unit includes: a reception detection unit detecting the response signal; a round-trip timer measuring a round-trip time; and a position estimation unit estimating a position of the mobile device. The position estimation unit: calculates a round-trip distance; and determines whether the mobile device is within a detection area.

Mobile device position estimation system

A vehicle system device is provided. The vehicle system device is used in a vehicle system that enables an in-vehicle device used in a vehicle and a mobile device carried by a user to transmit and receive a signal via a wireless communication. The vehicle system device may measure a time from a time point at which a reception intensity of the signal exceeds a threshold to a time point at which the reception intensity falls below the threshold.

Vehicle system device and vehicle system

Whether a radio wave received by a portable terminal is a radio wave directly received from an in-vehicle apparatus is determined, based on (i) the characteristic related to the direction of the magnetic field or electric field in the radio wave received by the portable terminal, (ii) the information representing the position of the portable terminal, and (iii) the information representing the orientation of the portable terminal.

Vehicle system, portable terminal, and in-vehicle apparatus

In a vehicle-mounted device, a first time period measuring unit starts measurement of a first time period when detecting an exit movement of a user. Before an elapse of the first time period, a vehicle side transmission unit periodically transmits a response request signal at a predetermined transmission period; and a locking and unlocking control unit keeps a door unlocked while receiving a response signal, locks the door when incapable of receiving the response signal, and keeps the door unlocked when capable of receiving the response signal at the elapse of the first time period. After the first time period is elapsed, the vehicle side transmission unit periodically transmits the response request signal at a second time period; and the locking and unlocking control unit keeps the door unlocked while receiving the response signal, and locks the door when incapable of receiving the response signal.

Vehicle-mounted device

A vehicle system includes a vehicle-mounted device mounted to a vehicle and a portable device portable by a user, and performs a control to the vehicle corresponding to a collation result performed based on a wireless communication established between the vehicle-mounted device and the portable device. The vehicle-mounted device includes a vehicle-mounted transmission unit which simultaneously transmits radio waves having a predetermined phase difference using at least two transmission antennas disposed orthogonal to each other. The portable device includes a triaxial reception antenna receiving the at least two radio waves, and a magnetic field strength detection unit detecting a magnetic field strength on each of three axes of the triaxial reception antenna. One of the vehicle-mounted device or the portable device includes an illicitness determination unit determining, based on the detected magnetic field strength, whether the wireless communication is established through an illicit repeater.

Growing community of inventors

Kariya, Japan

Koji Sakamoto