Toyota Jidosha Kabushiki Kaisha

Eisaku Akutsu

Keiji Aoki

Kenji Sasaki

Yoshihiro Ohkuwa

An image processing device includes a first camera that captures the periphery of a vehicle, specific region extracting units that extract regions, each of which is closer to the edge of an image than to the center of the image, as specific regions, and a movement amount calculating unit that calculates the amount of movement of the vehicle on the basis of image information in a plurality of specific regions. Therefore, it is possible to process only the first specific region and the second specific region of the captured image and thus effectively perform image processing.

On-vehicle image processing device for vehicular control

A system which accurately detects a position of a vehicle on a road regardless of weather is disclosed. Radio wave reflecting bodies are placed on a road, and transmitter-receiver which can transmit and receive radio waves of wavelength is longer than a millimeter are placed on a vehicle. Based on a ratio of reception strength of the transmitter-receiver in the right and left of the vehicle, a displacement of the vehicle relative to the radio wave reflecting body is detected. The radio wave reflecting bodies have apertures or notches in a predetermined interval so that the radio wave signals reflected thereby has periodicity, and can be distinguished from other objects on the road.

Vehicle position detection system

A vehicle running position detecting system includes a receiving unit, which is mounted on a vehicle, for receiving signals transmitted from a first transmission unit and a second transmission unit which are placed so as to face each other with a lane of a road between, the first transmission unit and the second transmission unit transmitting the signals toward the lane in predetermined areas, and a position identifying unit for identifying a position of the vehicle in a width direction of the road based on states of the signals received by the receiving unit.

Vehicle running position detecting system

A traveling guidance system provides a traveling vehicle with various types of data indicating the flow of traffic to smooth travel. The speed and pass time data of the preceding vehicle is sent to an electronic wave tag laid on a road surface. The electronic wave tag then sends the data to the succeeding vehicle when it passes over the electronic wave tag. Furthermore, the received data is sent to a control center through communication equipment, which predicts the occurrence of traffic congestion based on the speed and pass time data of vehicles at each point and sends the prediction to electronic wave tags at points where the occurrence of traffic congestion is predicted. Traffic data from the control center is sent to passing vehicles through the electronic wave tag and each passing vehicle controls its travel based on the traffic data.

Vehicle traveling guidance system

A radio communication system between a mobile station on a vehicle and a stationary station in which a uniform field intensity is obtained in a direction of a width of a road so that a good communication can be performed irrespective of a position of the vehicle on the road. A mobile station is provided on the vehicle. A stationary station communicating with the mobile station includes at least one pair of antennas located with the road therebetween so that the antennas generate an electric field having a substantially uniform intensity in a direction of a width of the road.

Radio communication system between a vehicle and a roadside station

A bidirectional communication system, including a base station and a plurality of mobile stations, comprises a first unit which alternatively sets a number of transmitting time slots and a number of receiving time slots, each transmitting time slot used by the base station to transmit data to one of the mobile stations on a corresponding one of subchannels assigned for the mobile stations, each receiving time slot used by the base station to receive data from one of the mobile stations on a corresponding one of the subchannels. A second unit changes one of the transmitting time slots and the receiving time slots to a reversed-mode time slot related to a particular one of the mobile stations, whereby the base station uses both the reversed-mode time slot and a corresponding one of the transmitting time slots and the receiving time slots to transmit data to the particular one of the mobile stations or receive data from the particular one of the mobile stations.

Bidirectional communication system

A system for detecting an object located on a travelling path even in bad weather or during nighttime in which conducting wires having a predetermined impedance value are laid along a travelling path, and a signal is supplied to the conducting wires from a signal source. If a vehicle exists on the path, the impedance of the conducting wires changes at the position where the vehicle is present. A signal reflected from the impedance change position is detected by a detector. The position of the vehicle can be determined from the timing of the received reflection signal. It is also possible to detect a vehicle changing lanes or the like by means of a plurality of conductive wires laid along the travelling path. Instead of a conducting wire, an optical fiber may be provided for determining the position of a vehicle using the refractive index change in the optical fiber due to the weight of the vehicle.

On-road object detecting system

A communications infrastructure system for vehicles. The communications infrastructure system includes an infrastructure including a plurality of beacons sequentially positioned along a road wherein the beacons transmit respective ones of a repeated series of at least three kinds of signals. The communications infrastructure system also includes a communications apparatus provided with a vehicle, which communications apparatus comprises a receiver for receiving a signal transmitted by the beacons, a unit for discriminating the kind of signal, a memory for recording a past record of the kind of signal, and a signal generator generating a signal corresponding to the past record.

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Susono, Japan

Eisaku Akutsu