Hitachi, Ltd.

Hitachi Automotive Systems, Ltd.

Hitachi Displays, Ltd.

Hitachi Power Solutions Co., Ltd.

Mutsumi Suzuki

Toshiaki Kusunoki

Masakazu Sagawa

Nobuaki Kabuto

Toshimitsu Watanabe

Makoto Okai

Akitoshi Ishizaka

Mitsuo Nakajima

Yoshihisa Ooishi

Junichi Ikoma

Masamichi Yamada

Nobuyasu Kanekawa

Masahiro Iwamura

Yoshiyuki Kaneko

Yoshiro Mikami

Mutsumi Kikuchi

Kazutaka Tsuji

Shigeo Mikoshiba

Tetsu Ohishi

Yoshie Kodera

Hiroshi Iwasawa

Shinichi Shinada

Masahiro Masunaga

Ryo Kuwana

Isao Hara

Hirohisa Mizota

Kota Sasaki

Masanori Kitaoka

Akihiko Kohgami

Yuusuke Kourai

To improve defect detection accuracy, an ultrasonic inspection device causing an ultrasound beam to enter an object through a gas for inspection of the object includes: a transmission probe emitting the ultrasound beam; a reception probe mounted on an opposite side of the object from the transmission probe; and an eccentric distance adjuster that adjusts an eccentric distance between a transmission sound axis which is the central axis of the propagation path of the ultrasound beam transmitted from the transmission probe and a reception sound axis which is the central axis of the propagation path of an ultrasound beam assumed to be emitted from the reception probe to a distance greater than zero.

Ultrasonic inspection system and ultrasonic inspection method

Provided is a liquid droplet generation method capable of generating liquid droplets having a diameter of 100 μm or more. The liquid droplet generation method for generating liquid droplets from a liquid layerby using a plurality of transducers, the method including irradiating the liquid layerwith a plurality of ultrasonic waves from the plurality of transducersto scatter primary liquid dropletsA andB from the liquid layer, and causing the primary liquid dropletsA andB being scattered to aggregate and grow into a secondary liquid dropletA.

Liquid droplet generation method

Provided is a SiC semiconductor element equipped with a SiC integrated circuit having a stable characteristic, which operates normally even in a radiation environment. A radiation resistant circuit device includes: a SiC semiconductor element equipped with a SiC integrated circuit, a printed board on which the SiC semiconductor element is provided, a conductive wiring that is arranged inside the printed board and has a predetermined surface facing a bottom surface of a substrate electrode of the SiC integrated circuit, and an insulating material arranged between the bottom surface of the substrate electrode of the SiC integrated circuit and the predetermined surface of the conductive wiring.

Radiation resistant circuit device, pressure transmission device, and nuclear power plant measurement system

An object is to provide an ultrasonic measurement apparatus capable of measuring a gap length between a rotational body and a casing without providing a reference position indication member on the rotational body in fluid machinery. The ultrasonic measurement apparatus which applies to fluid machinery having a rotational body as a measurement object includes: an ultrasonic probe installed and used outside a casing part of the fluid machinery, the casing part accommodating the rotational body; a measurement circuit unit electrically connected to the ultrasonic probe; and a reference signal generation unit. The measurement circuit unit includes a gap calculation unit configured to calculate a gap length between the rotational body and the casing part; the reference signal generation unit includes a rotary machine signal detection unit to be electrically connected to a rotary machine conversion unit, and a reference time generation unit electrically connected to the rotary machine signal detection unit; and the measurement circuit unit includes an offset time setting unit configured to make an offset time variable, the offset time spanning from a reference time signal outputted from the reference time generation unit to transmission by the ultrasonic probe.

Ultrasonic measurement apparatus and ultrasonic measurement method

A battery monitoring device includes a first voltage measurement unit, a second voltage measurement unit, a current measurement unit, a cell voltage ratio calculation unit, a cell voltage calculation unit, and a trigger signal generation unit. The cell voltage ratio is a ratio of an individual cell voltage measurement value to a total sum of all cell voltage measurement values. The cell voltage measurement value is equal to the cell voltage ratio multiplied by the total voltage of all of the battery cells constituting the battery pack.

Battery monitoring device that monitors a plurality of battery cells connected in series

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

Rotational angle measurement apparatus measuring magnetic-field angle or rotational angle with sufficient accuracy wherein a non-magnetic conductor is arranged in the vicinity of the magnetic flux generator or the magnetic sensor, even when the magnetic flux generator rotates at high speed. The rotational angle measurement apparatus is configured with a magnetic sensorwhich responds to a magnetic-field angle and a detection unitwhich inputs an output of the magnetic sensor. The rotational angle measurement apparatus is employed with a rotatable bodyprovided with a magnetic flux generator. The output of the magnetic sensor is a raw-angle signal setcorresponding to the magnetic-field angle. The detection unit outputs a corrected angle after a non-magnetic conductor in the vicinity of the magnetic sensor is corrected, using a correction value outputted by a correction function with rotational velocity of the rotatable body as an argument.

Rotational angle measurement apparatus, control apparatus, and rotation-machine system

There has been a problem that a bridge circuit using magneto-resistive elements or transducer elements could output a signal including an offset voltage, which could result in lower measurement accuracy. In order to solve such a problem, half-bridges each having magneto-resistive elements or transducer elements are excited with different excitation voltages so that the offset voltage is eliminated and the measurement accuracy is improved.

Magnetic field detection apparatus and measurement apparatus

A rotational angle-measurement apparatus with high accuracy is provided through electric correction of the rotational angle-measurement apparatus by rotating the rotation shaft at a constant speed. The rotational angle-measurement apparatus includes an electric motor having a rotation shaft, a magnet mounted on one end of the rotation shaft, and a magnetic sensor with an output signal that changes in accordance with an orientation of a magnetic field surrounding the magnetic sensor. The magnetic sensor outputs an angle signal representing the rotational angle of the rotation shaft, and the correction procedure utilizes rotation of the electric motor shaft through more than one revolution at a rotational speed with a known rate of change.

Rotational angle-measurement apparatus and rotational speed-measurement apparatus

The object of the invention is to provide a rotational angle measurement apparatus that is capable of correcting an error due to pin-angle error with a small amount of calculation operation. The rotational angle measurement apparatus includes a magnetic sensorand a signal processing unitM. The magnetic sensor includes two bridges comprising magneto-resistance elements each having a pinned magnetic layer. A ratio-calculation unitof the signal processing unitM calculates a ratio Vy/Vx of output signals Vx and Vy. A parameter correction unitsubtracts a predetermined correction parameter &#x3b2; from the ratio Vy/Vx calculated by the ratio-calculation unit. An a tan-processing unitconducts arctangent processing on the value calculated by the parameter correction unit and calculates an angle of magnetic field &#x3b8;.

Rotational angle measurement apparatus

Degradation of an electron emission element by irradiation of the positive ion generated inside a panel is suppressed. A deflection electrode is periodically disposed, and the electron emission region of an electron emission element is disposed so as not to include a center line between adjacent deflection electrodes, so that an electron beam trajectory is deflected and bombardment or irradiation of the generated positive ion to the electron emission region is prevented.

Image display apparatus with particular electron emission region location

By making Nd concentration in the tunneling insulating filmsmaller than Nd concentration in the base electrode first layer, the accumulated electric charge amount in the tunneling insulating filmis reduced and afterimage is decreased. By setting a relation between a position of a stack interface of the base electrodeand a thickness of an insulating layer properly, the generation of a device defect is prevented.

Image display apparatus

The present invention provides an image display capable of enhancing a production yield. The image display comprises a display device including a first plate which has a plurality of electron-emitter elements each having a structure comprised of a base electrode, an insulating layer and a top electrode stacked on one another in this order, the electron-emitter element emitting electrons from the surface of the top electrode when a voltage of positive polarity is applied to the top electrode; a plurality of first electrodes for respectively applying driving voltages to the base electrodes of the electron-emitter elements lying in a row (or column) direction; and a plurality of second electrodes for respectively applying driving voltages to the top electrodes of the electron-emitter elements lying in the column (or row) direction, a frame component, and a second plate having phosphors, wherein a space surrounded by the first plate, the frame component and the second plate is brought into vacuum. In the display apparatus, the at least one electron-emitter element includes the base electrode and the top electrode, at least one of which is connected to the first electrode or the second electrode through a resistor element.

Image display and a manufacturing method of the same

The present invention provides an image display device, by which it is possible to prevent dielectric breakdown between a bottom electrode and a top electrode (top electrode bus line), which make up thin-film type electron sources, and which is free of display defect and has longer service life. On a cathode substratea bottom electrodea tunneling insulatorand a top electrodeare prepared. On a lower layer of the top electrodea top electrode bus lineis formed, and the top electrodeis reliably connected to the top electrode bus linevia a contact electrodeA field insulatorA, a lower layerof the interlayer insulator deposited by sputtering and an upper layerof the interlayer insulator are laminated between the top electrodeand the contact electrode and the bottom electrodeand the bottom electrodeis insulated from the top electrode(top electrode bus line).

Image display device

A cold cathode type flat panel display which is an image display device includes a vacuum panel container composed of a cathode substrate in which plural cold cathode type electron sources are arranged, an anode substrate, plural spacers for supporting the cathode substrate and the anode substrate, and a glass frame. Plural electrical lines extend in a line direction and a row direction across an interlayer insulator on the cathode substrate. Parts of lines positioned in an upper layer of the plural electrical lines are made into scan lines and lines positioned in a lower layer are made into data lines. Further, parts of the electrical lines positioned in the upper layer are made into spacer lines for giving to the spacers a voltage lower than an acceleration voltage which is applied to an accelerating electrode.

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Kodaira, Japan

Mutsumi Suzuki