Hitachi, Ltd.

Hitachi Astemo Ltd.

Hitachi Automotive Systems, Ltd.

Hiroshi Shinoda

Hiroshi Kondoh

Takahide Terada

Toshiyuki Nagasaku

Hideyuki Sakamoto

Kazunori Hara

Keisuke Yamamoto

Shiho Izumi

Kenji Sekine

Hideyuki Nagaishi

Ming Liu

Masaru Kokubo

Junichi Sakano

Taisuke Ueta

Tomohiko Yano

Shigenobu Komatsu

Kazuo Matsuura

Hidetatsu Yamamoto

Mitsutoshi Morinaga

Kohei Onda

An autonomous drive ECUincludes: at least two microcomputersandcapable of receiving sensing data from a plurality of sensors; failure detection unitsandthat detect a failure of the plurality of sensorsor the microcomputersand; a mode selection unitthat selects a normal operation mode and a fallback operation mode; and a sensor selection unit that selects the sensorbased on a failure part detected by the failure detection unitor a surrounding situation of an own vehicle calculated from the sensing data. Any of the at least two microcomputersandgenerates a drive signal for operating an actuator using the sensing data received from the sensorselected by the sensor selection unit in the case of the fallback operation mode.

Electronic control device and in-vehicle device

Provided is an in-vehicle control system capable of reducing an increase in cost accompanying advancement of a fallback operation. Therefore, the in-vehicle control system includes: a plurality of control circuitsandrespectively including control units that perform data communication with each other; an external environment recognition sensor a; and a plurality of wirings, andconnecting the external environment recognition sensor aand the plurality of control circuitsand. The plurality of control circuitsandinclude: a first power supply unit that supplies power to the external environment recognition sensor avia a corresponding wiring among the plurality of wirings, and; and a first detection unit that detects an abnormality related to the power supplied to the external environment recognition sensor a. A control unit in a control device including a first detection unit that has detected the abnormality is controlled to acquire data of the external environment recognition sensor afrom a control unit included in the other control device.

In-vehicle control system

A transient increase/decrease of power supplied to a reconfiguration circuit to be a logic circuit whose circuit configuration can be changed is reduced. An autonomous traveling control ECU has a reconfiguration circuit, a function control unit, a power supply circuit, and a power supply control unit. The reconfiguration circuit is a reconfigurable logic circuit. The function control unit determines an operation mode of the reconfiguration circuit on the basis of a mode determination signal and controls a reconfiguration of the reconfiguration circuit on the basis of a determination result. The power supply circuit supplies power to the reconfiguration circuit. The power supply control unit controls the power supply circuit. The power supply control unitcontrols a load current generated by the power supply circuit before a load variation of the reconfiguration circuit, on the basis of power supply control information to be information for controlling the power supply circuit.

Electronic control device, in-vehicle system, and power supply control method

A transient increase or decrease of power supplied to a reconfiguration circuit to be a logic circuit whose circuit configuration can be changed is reduced. An autonomous traveling control ECUhas a reconfiguration circuita main power supply circuitan auxiliary current source circuitand a function control unitThe reconfiguration circuitis a reconfigurable logic circuit. The main power supply circuitsupplies a power supply voltage to the reconfiguration circuitThe auxiliary current source circuitincreases or decreases a current supplied from the main power supply circuitto the reconfiguration circuitThe function control unitdetermines an operation mode of the reconfiguration circuiton the basis of a mode determination signal input from the outside and indicating a traveling mode of a vehicle, and controls a reconfiguration of the reconfiguration circuiton the basis of a determination result. The auxiliary current source circuitincreases or decreases the current supplied to the reconfiguration circuitin accordance with a load variation of the reconfiguration circuiton the basis of an auxiliary current control signal for giving an instruction on an increase or decrease of the current supplied to the reconfiguration circuit

Electronic control device, in-vehicle system, and power supply device

The present invention reduces conducted noise of an input current in a power supply device having a plurality of channels at low cost. In a power supply circuit () possessed by an autonomous running control ECU, switching circuitsrespectively generate, on the basis of control signals C, power supplies supplied to a plurality of logic circuits. A transition management unitcontrols the switching circuits. A clock generation unitgenerates a plurality of clock signals. The transition management unithas a control signal generation unit and a plurality of delay units. The control signal generation unit generates intermediate control signals from the clock signals generated by the clock generation unit. The delay units delay the intermediate control signals on the basis of command signals and output the delayed intermediate control signals as the control signals C. The clock signals generated by the clock generation unit include at least one clock signal having a different frequency.

An insulating transmission medium with high insulation reliability which transmits electromagnetic energy between circuits having different reference voltages, with low loss, in small size, and at low cost, and a communication apparatus which uses radio waves between a rotator and a stator to perform two-way communication between at least one rotator-specific communication device placed on a rotator. One stator-specific communication device is placed on a stator and is connected to multiple stator-specific antennas. The rotator-specific communication device is connected to at least one rotator-specific antenna, and includes a signal strength indicator. The stator-specific communication device includes a phase shifter which increases or decreases the phase angle of the signal by a phase shift amount in such a manner as that the signal strength is equal to or more than a predetermined value.

Communication apparatus using radio waves between rotator and stator

An electromagnetic wave propagation mediumextends in the propagation direction of an electromagnetic wave and has an electromagnetic wave propagation space sandwiched between conductors in the direction perpendicular to the electromagnetic wave propagation direction. A base unitand multiple terminalsare placed on the electromagnetic wave propagation medium. When the position of a terminalis detected, the base unittransmits a position detection signal through the electromagnetic wave propagation mediumto the terminal. This position detection signal is attenuated more heavily during its propagation through the electromagnetic wave propagation mediumthan a communication signal for use in normal communication is. The signal strength of the position detection signal drops as it moves away from the base unit. Hence the position of each terminalcan be detected based on the signal strength of the position detection signal received by each terminal

Position detection system

An electromagnetic wave propagation device includes multiple planar propagation media each formed by laminating at least one planar conductor and at least one planar dielectric, multiple transceivers for transmitting and receiving information among electronic apparatuses, and a first interface for transmitting and receiving the electromagnetic wave between the transceivers and the planar propagation media. Planar dielectric spacers are provided for isolating the multiple planar propagation media from one another. The planar propagation medium is disposed to have an overlapped part with at least the other of the planar propagation media so that an obverse face of the medium and a reverse face of the other medium are at least partially overlapped with each other. The planar conductor is provided with an electromagnetic wave linking unit at the overlapped part that transmits and receives the electromagnetic wave between the planar propagation media.

Electromagnetic wave propagation path and electromagnetic wave propagation device

The disclosed electromagnetic wave transmission medium prevents electromagnetic leakage during high-power electromagnetic wave transmission. The sheet-form electromagnetic wave transmission medium is configured from a first mesh conductor used in transmission of electromagnetic waves having a first power; and a second mesh conductor used in transmission of electromagnetic waves having a second power. By using two mesh conductors, when said sheet-form electromagnetic wave transmission medium is used, the conduction density of the surface region where electromagnetic waves are extracted to be used for power supply assumes a coarser state than that of the other surface region.

Electromagnetic wave transmission medium and electromagnetic wave transmission system

When a wavelength of an electromagnetic wave in an electromagnetic wave propagation space () is &#x3bb;, and n is an integer, in a case where a first conductive layer () and a second conductive layer () are short-circuited in a first end surface (), the more distant an electromagnetic wave output interface () is from an electromagnetic wave input interface (), the closer to a distance of &#x3bb;/4+n&#xb7;&#x3bb;/2 from the first end surface () which is short-circuited the electromagnetic wave output interface is installed, and, in a case where the first conductive layer () and the second conductive layer () are not short-circuited in the first end surface (), the more distant the electromagnetic wave output interface () is from the electromagnetic wave input interface (), the closer to a distance of n&#xb7;&#x3bb;/2 from the first end surface () which is not short-circuited the electromagnetic wave output interface is installed.

Electromagnetic wave propagation medium

An electromagnetic wave propagation apparatus has a planar propagation medium including a planar conductor, a first planar dielectric, a planar mesh conductor, and a second planar dielectric being overlaid on each other in order; at least one electromagnetic wave input port for the planar propagation; a power supply station that supplies the planar propagation medium with an electromagnetic wave via at least one electromagnetic wave input port; and at least one power receiving apparatus for a second planar dielectric of the planar propagation medium that includes an electromagnetic wave interface and a power receiving circuit. A dielectric board has multiple conductor patterns as the electromagnetic wave interface. At least one connection means is between the conductor pattern and the power receiving circuit. At least one short-circuit means between the conductor patterns is at an end of the conductor pattern.

Electromagnetic wave propagation apparatus and electromagnetic wave interface

In order to provide a communication system which performs a communication while maintaining high voltage insulation, a control circuit which is operated at a low voltage, and a controlled circuit which is operated at a high voltage are connected through a propagation layer having a waveguide structure, thereby performing a communication. In particular, a displacement current (surge current) flows between a high voltage circuit and a low voltage circuit due to a potential fluctuation which occurs in the high voltage circuit A surge current protection circuit is provided, and applying an input which is out of rating to the communication module and the low voltage circuit due to such a surge current is prevented.

Communications system

A wireless power transmission system includes a receiver and a transmitter. The transmitter includes: a power transmission unit that transmits power; a power adjustment unit that adjusts power to be transmitted; and a communication unit. The receiver includes: a power receiving unit that receives power; a power detection unit that detects the received power; a power storage unit that stores the received power; and a communication unit. The power to be transmitted is adjusted on the basis of power transmission efficiency and the remaining energy storage level. The power transmission efficiency is the ratio between the transmitted power and the received power.

Wireless power transmission system, transmitter, and receiver

In a conventional automotive radar, a return occurs in a phase difference characteristic necessary for a super-resolution method, resulting in an increase of a detection error, or an extremely narrowed azimuth detection range. A transmitting array antenna, and receiving array antennas are composed of antenna elements respectively, and aligned in a horizontal direction. The weighting of receiving sensitivities of the antenna elements of the receiving array antennais A, A, A, and A, which are monotonically decreased from an inner side toward an outer side as represented by A&#x2267;A&#x2267;A&#x2267;A. On the other hand, the receiving array antennais symmetrical with the receiving array antenna with respect to the receiving array antenna

Mobile radar and planar antenna

When a microstrip line is connected with a waveguide, there is a limit to reducing the connection loss by using only a matching box. We have discovered that in a transmission mode line transducer for converting between the TEM waves of the microstrip line and the TE01 waves of the waveguide, if the cross-sections of the microstrip line and the waveguide are substantially the same size, in the case of a 50&#x3a9; microstrip line when the characteristic impedance of the waveguide is about 80%, i.e., 40&#x3a9;, the line conversion loss can be optimized. Therefore, according to the present invention, the microstrip line is connected with the waveguide using a &#x3bb;/4 matching box by means of a ridged waveguide having a low impedance and a length of &#x3bb;/16 or less.

Growing community of inventors

Tokyo, Japan

Hiroshi Shinoda