Hitachi, Ltd.

Hitachi Automotive Systems, Ltd.

Hitachi Astemo Ltd.

Hiroshi Iwasawa

Teppei Hirotsu

Masahiro Matsumoto

Akihiko Kudo

Mutsumi Kikuchi

Toshiaki Nakamura

Yutaka Kobayashi

Masahiro Iwamura

Akihiko Emori

Akihiko Kanouda

Mutsumi Suzuki

Shin Yamauchi

Mitsuhiko Watanabe

Takanori Yamazoe

Shin Takahashi

Tatsuya Maruyama

Akira Gunji

Noritaka Matsumoto

Takahide Terada

Tomonori Kanai

Takefumi Okumura

Hiromichi Endoh

Tatsuya Horiguchi

Atsushi Arata

Ko Takahashi

Junya Fujita

Mitsuo Noda

Conventional security measures are generally intended for an IT system, and it has been difficult to satisfy a real-time property and availability requested to a control system. Furthermore, since a time-division type time slot communication method is not taken into consideration, such time slot communication has problems in efficient utilization of computer resources and decrease in availability. In order to solve the above-described problems, the present invention specifies a time slot from characteristics of a communication packet received by a reception unitby using a time slot characteristic storage unit, and selects, in accordance with the specified time slot, an inspection pattern stored in an inspection pattern storage unitby using an inspection pattern selection unit

Communication control apparatus and system

There is provided a technology capable of synchronizing a plurality of timers with a simple circuit configuration in an electronic control unit that controls a vehicle. An electronic control unit according to the present invention concatenates a second timer value as the most significant bit of a first timer value reset by a synchronization signal, and counts up the second timer value by the synchronization signal.

Electronic control device

The present invention provides an electronic controller and the like capable of identifying the order of communication apparatuses connected to a bus while minimizing manufacturing cost. In the present invention, bus wiringhas one end connected to a portand the other end connected to a port. A plurality of lower ECUstoare connected to the bus wiring. A current sensor CS measures current Isflowing through the portand current Isflowing through the portby applying current to the bus wiringfrom each of the plurality of lower ECUsto. The higher controlleridentifies the order of the plurality of lower ECUstoon the bus wiringon the basis of the current Isand the current Iswhich are measured for each of the plurality of lower ECUsto

Electronic controller and communication apparatus

Provided is a method of detecting and preventing soft errors without performing multiplexing. As a result, it is possible to improve reliability of a device while suppressing an increase in mounting cost and reduction in operation speed accompanied with it. A diagnosis system includes an initial parameter generation unit which generates a plurality of initial parameters predicted on the basis of an external input; an operation unit which has a plurality of operators operating optimal solutions to the initial parameters by using an evaluation function describing a control object; and a diagnosis unit which diagnoses the operation unit on the basis of an output of the operation unit. When an optimal solution candidate giving an evaluation value deviating from a value taken by each evaluation value by a constant threshold or more among evaluation values corresponding to the optimal solutions to the initial parameters is found, the diagnosis unit diagnoses an error of the operation unit.

Diagnosis system and electronic control device

Even with a large ripple voltage superposed on a voltage of a battery cell, the voltage of the battery cell can be measured accurately. In a battery monitoring device, a supply circuit, based on a reference voltage inputted from an assembled battery, generates a driving voltage for driving each of switching elements, of a selection circuit and supplies the driving voltage to the selection circuit. The reference voltage is inputted from the assembled battery to the supply circuit via a detecting filter circuit. As a result, a time constant of a route through which the reference voltage is inputted from the assembled battery to the supply circuit is approximately equal to time constants of detecting filter circuits.

Battery monitoring device

A power supply startup system activates a power supply of a device provided with a battery or the like at high speed by a wireless signal while suppressing current consumption on standby. The power supply startup system includes a battery, a device supplied with a power from the battery, and a controller which performs wireless communication with the device. The device includes a power supply section which generates a power supply from the battery, a startup section which receives a wireless startup signal transmitted by the controller and outputs a startup signal to the power supply section, a control section which controls the power supply section and the startup section, and a wireless communication section which performs wireless communication with the controller. The wireless startup signal includes at least two signal regions of a first stage and a second stage.

Power supply startup system

In a magnetic-field angle detection device and a rotation angle detection device in which the accuracy of the measured angle is not degraded even if the MR ratio of the tunneling magnetoresistance element is increased. In a magnetic-field-angle measurement apparatus including a magnetic-field-angle detection circuit and a magnetic sensor having a tunneling magnetoresistance element with a pinned magnetic layer, the magnetic-field-angle detection circuit has a power-supply unit that outputs a constant voltage as a bias voltage to the tunneling magnetoresistance element of the magnetic sensor and a current-detection unit that detects an output current of the tunneling magnetoresistance element. The accuracy of the measured angle of the magnetic-field angle detection device and the rotation angle detection device is improved by measuring the tunneling magnetoresistance element current while maintaining the terminal voltage of the tunneling magnetoresistance element constant with input impedance of the current-detection unit as zero.

Magnetic-field-angle measurement apparatus and rotational-angle measurement apparatus using same

A battery pack includes a plurality of battery units mutually connected in parallel, each including a cell group in which one or two or more secondary cells are connected in series, and a first current control element that is connected in series with this cell group, a first control means that controls the charging/discharging current for each battery unit by controlling the operation of the first current control element included in each of the battery unit; a voltage measurement means that measures the voltage of the cell group or cells included in each of the battery unit, and a diagnosis means that diagnoses a deterioration level or a fault of each battery unit on the basis of the voltage of the cell group or cells measured by the voltage measurement means.

Battery pack and battery pack controller

The present invention provides a high-accuracy electrostatic capacitance type physical quantity sensor and angular velocity sensor configured so as to be capable of suppressing noise derived from internal noise while maintaining resistance to externally-incoming noise. A detection elementhas a movable masssupported displaceably by a physical quantity given from the outside, and a detection electrode Ef. A shield wireis disposed around wirings connected to the input of a capacitance detection circuitand is connected to a dc potential of low impedance. A value Cin of an input capacitance relative to a fixed potential of low impedance at a portion at which the detection elementis connected with the capacitance detection circuitis set to fall within a range of 1.5 pF&#x3c;Cin&#x3c;20 pF.

Electrostatic capacitance type physical quantity sensor and angular velocity sensor

A lithium-ion rechargeable battery module having a plurality of lithium-ion battery cells, arranged that battery cells located at an high temperature portion of the module are electrically connected in parallel with battery cells located at a low temperature portion of the module. The battery cells at the high temperature portion have a higher electric resistance at 20&#xb0; C. and a better high-temperature storage characteristic at 50&#xb0; C. than those of the battery cells located at the low temperature portion.

Lithium-ion rechargeable battery module, vehicle with the battery module and generating system with the battery module

The present invention aims to provide an angular velocity detection device which is capable of reducing the effect of coupling between a drive electrode and a first displacement detection electrode by a floating capacity, and is low in cost. In the angular velocity detection device, an oscillating bodyis displaceable in a first direction and a second direction which orthogonally intersect each other. The oscillating bodyis oscillated in the first direction by an electrostatic force corresponding to a drive signal generated by a non-interference signal generator. A carrier signal generated by the non-interference signal generatoris applied to the oscillating body. A first displacement detection circuitand a second displacement detection circuiteach detect a displacement of the oscillating bodyas a displacement modulation signal indicative of a change in electrostatic capacity synchronized with the carrier signal to thereby detect an angular velocity. Here, the frequency of the drive signal and the frequency of the carrier signal are set so as to be generated at such a frequency ratio that a higher harmonic of the drive signal multiplied by an odd number does not the displacement modulation signal.

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Tokyo, Japan

Hiroshi Iwasawa