Denso Corporation

National Institute of Information and Communications Technology, Incorporated

Nagoya Institute of Technology

Yutaka Aoki

Minoru Okada

Masayuki Fujise

Hiroshi Harada

Manabu Sawada

Akihisa Fujita

Masahiro Kuwabara

Kunio Sakakibara

Yusuke Kato

Kazuoki Matsugatani

Keiko Akiyama

Yasuke Kato

In an abnormality detection device for detecting whether there is an abnormality in either of an optical sensor and a camera that are used to detect objects around a vehicle, a correlation value calculation unit calculates a correlation value between at least one of a reflection intensity image that is detected by the optical sensor emitting light toward surroundings of the vehicle and then receiving reflected light of emitted light and a background light image that is detected by the optical sensor receiving light from the surroundings of the vehicle while the optical sensor is emitting no light, and a captured image of the surroundings from the camera. An abnormality determination unit is configured to, in response to the correlation value calculated by the correlation value calculation unit being out of a predefined range, determine that there is an abnormality in either of the optical sensor and the camera.

Abnormality detection device for vehicle

In a radar assembly, a first dielectric member includes a dielectric outermost structural member of a vehicle. A radar device includes an antenna module, and a substantially tubular or domed radome. The radome includes a transmissive portion, and is disposed to cover the antenna module such that the transmitted radar wave passes through the transmissive portion. The transmissive portion is disposed behind the back surface of the first dielectric member with space thereto. A second dielectric member includes at least the transmissive portion, and is disposed to face the first dielectric member. A frequency-selective substrate passes a radar wave within a frequency band therethrough, and block radar waves outside the frequency band. The frequency-selective substrate is disposed such that its first surface is directly abutted onto the first dielectric member, and its second surface is directly abutted onto the second dielectric member to constitute a sandwich structure.

Radar assembly

In a power-loss reducing system, a transmitting unit causes a radar to transmit a measurement radio wave, and a power monitoring unit monitors power of the measurement radio wave transmitted from the radar through a cover while changing a positional relationship between the cover and the radar. An extracting unit extracts a value of the changed positional relationship between the cover and the radar based on a result of the monitoring of the power such that the extracted value of the positional relationship allows reduction of power loss of a radar wave transmitted, through the cover, from the radar located based on the extracted value of the positional relationship.

Method and system for reducing power loss of transmitted radio wave through cover

The radar apparatus includes an antenna device including a transmitting antenna and a receiving antenna, a main body which generates a radar wave, transmits the radar wave from the transmitting antenna, and receives the radar wave reflected from an obstacle to be detected by the receiving antenna, and a cover member covering the main body and the antenna device on a side of a transmission direction of the radar wave and located out of contact with the main body and the antenna device. The cover member has a transmission portion allowing the radar wave to pass therethrough, a surface of the transmission portion facing the antenna device being inclined by an angle greater than 3 degrees with respect to an antenna surface of the receiving antenna.

Radar apparatus and mounting structure for radar apparatus

The radar apparatus includes an antenna device including a transmitting antenna and a receiving antenna, and a main body which generates an FMCW-modulated radar wave, transmits the radar wave from the transmitting antenna at a transmit timing, and receives the radar wave reflected from an obstacle by the receiving antenna at a receive timing, the transmit timing and the receive timing temporally overlap each other at least partially. The radar apparatus further includes a cover member covering the main body and the antenna device on a side of a transmission direction of the radar wave and located out of contact with the main body and the antenna device, the cover member having a transmission portion allowing the radar wave to pass therethrough, a surface of the transmission portion facing the antenna device being out of perpendicular alignment with the transmission direction.

The present disclosure relates to a radio wave receiving system. The system includes an antenna that is operable for receiving a received signal. The received signal contains information. The radio wave receiving system also includes a reference signal generator that is operable for generating a reference signal. In addition, a selective output device is included that is operable for selectively outputting the received signal and the reference signal to a transmission path. The system also includes an information acquiring device that is operable for generating a signal component indicating a signal level difference between the received signal and the reference signal. The information acquiring device is further operable for acquiring the information from the signal component.

Radio wave receiving system, imaging system and radio wave receiving method

An electric wave transmitting/receiving module includes: a waveguide including a conductive member and an opening facing a transmitting side and/or a receiving side; a dielectric substrate disposed on a side opposite to the opening of the waveguide; and transmitting/receiving means. The transmitting/receiving means includes a core line, a transmitting/receiving element, and a wire. The core line and the transmitting/receiving element are horizontally disposed on the dielectric substrate. The core line transmits the transmitting electric wave and/or receives the receiving electric wave. The transmitting/receiving element outputs a transmitting/receiving signal corresponding to the transmitting electric wave and/or the receiving electric wave. The wire sends the transmitting/receiving signal from the transmitting/receiving element to an external circuit.

Electromagnetic wave transmitting/receiving module and imaging sensor having electromagnetic wave transmitting/receiving module

A high frequency module for converting a high frequency wave in a free space to a high frequency wave in a planar waveguide includes two metal plates, a dielectric substrate and a planar waveguide disposed on the dielectric substrate. The dielectric substrate between the two metal plates has the planar waveguide disposed thereon, and the planar waveguide protrudes either in a through hole bored in one of the two metal plates, or in a hollow space defined by the other of the two metal plates on the dielectric substrate.

High frequency module and array of the same

A vehicle-vehicle communication system includes an in-vehicle wire LAN established in a vehicle. The in-vehicle wire LAN includes a plurality of devices connected by optical fiber links. A terminal for radio vehicle-vehicle communication is connected to the in-vehicle wire LAN by the optical fiber link. The terminal receives an optical digital signal in a predetermined format from the in-vehicle wire LAN. The terminal includes a light controlled oscillator and applies the received optical signal to the light controlled oscillator. The light controlled oscillator outputs a transmission signal of a frequency shifted from a predetermined frequency according to the intensity of the applied optical signal. Thus the terminal generates the transmission signal using FSK-modulation technique without converting the format of the optical signal into another format. The transmission signal is transmitted to a device in another vehicle via radio waves.

Communication system including a wire network linked with another network via radio waves

A Micro-cell is formed to include a plurality of spot-cells. Communication is executed between a micro-cell base station and a mobile terminal in the micro-cell, and between a spot-cell base station and the mobile terminal in the spot cell. The micro-cell base station and spot-cell base stations are connected to an integrated base station. A signal transmitted to the micro-cell base station from the mobile terminal is transferred to the integrated base station and information transmitted to the mobile terminal is transferred to the micro-cell base station and/or spot-cell base station from the integrated base station. The respective integrated base stations are connected to a server via a dedicated backbone to enable a large-capacity transmission.

Communication system, communication method and mobile terminal

A radio communication system between a mobile terminal station of a vehicle and a plurality of roadside fixed base stations is so constructed that communication areas of the base stations do not overlap with each other and satisfy the following two conditions. Condition (i): each communication area is defined so that there cannot be a plurality of terminal stations simultaneously. Condition (ii): it is needless to perform multiple access such as time division in the communication area and capable of affording the whole band and all the communication time allocated to one communication area to one terminal station and broad band communication becomes possible. Thus, each mobile terminal station can utilize all the frequency band allocated for service.

Wireless communication system, fixed base station and mobile terminal station

A radio communication system performs radio communication between a terminal station installed on a vehicle and a plurality of base stations provided along a roadside. The system detects a vehicle traveling speed in each communication area formed by each base station. The vehicle traveling speed is detected by a method which uses radio communication between the terminal station and the base stations. The time of the vehicle stay in the communication area is estimated based on the detected vehicle traveling speed, and the length of a packet is determined based on the estimated time of the vehicle stay in the communication area. In this way, the present system performs data transmission using a packet of an appropriate length according to the detected vehicle traveling speed.

Growing community of inventors

Nisshin, Japan

Yutaka Aoki