Hitachi, Ltd.

Hitachi High-tech Control Systems Corporation

Satoshi Ichimura

Li Lu

Isao Hashimoto

Tadashi Sato

Akira Yamagishi

Jun Nukaga

Tomohiro Moriyama

Yasutomo Saito

Hiroshi Morita

Shinji Fujita

Toshiaki Rokunohe

Satoshi Ogura

Shotaro Ooishi

Masato Suzuki

Hajime Murakami

Takashi Iga

Akira Nishimizu

Kenichi Kawamura

Kohei Yamaguchi

Yasuhiro Mochizuki

Eiji Setoyama

Satoshi Takemori

Naoyuki Kurita

Naoya Miyamoto

Masami Sakamoto

Kenichi Natsui

Hiroshi Miyao

Hideki Ogata

Hirofumi Seki

Toshio Iwasaki

Kouji Ishiguro

Hisao Oonuki

Sensuke Okada

Daigo Komesu

Kenzo Kobayashi

Shotaro Ohishi

The present invention is directed to a leakage oil detection device for detecting leakage oil in an oil filled apparatus including: a light source configured to irradiate the apparatus; an imaging device configured to capture an image of the apparatus; a control device configured to control operations of the light source and the imaging device; a storage device configured to store a captured image; an image processing device configured to process the stored image; and a display device configured to display a processing result. The light source and the imaging device are arranged to capture specular reflection light from a surface of the apparatus as a target object. The image processing device recognizes a brightest portion and an adjacent dark portion on the image as leakage oil adhesion portions when a three-layer structure of luminance having bright portions having different luminances and a dark portion is observed in the image.

Leakage oil detection device and leakage oil detection method

An object of the present invention is to provide a stationary induction electric apparatus that can improve insulating performance with a few additional structures. In the stationary induction electric apparatus comprising: an iron core; a low-voltage coil conductorwound on the iron core; an insulatorenclosing the low-voltage coil conductor; and a high-voltage coil conductorwhich is wound on the insulator and to which a voltage is applied from the outside, a first shield conductorwound adjacent to the inner peripheral surface of the insulator, a second shield conductorwound adjacent to the outer peripheral surface of the insulator, one end of the first shield conductor, and one end of the second shield conductor are electrically connected to any region of the high-voltage coil conductor.

Stationary induction electric apparatus

An oil leakage detector of the present invention includes an image processing unit wherein the image processing unit calculates the values of saturation and intensity of each pixel in the color image of the object after an ultra-violet light is irradiated thereon, draws an intensity-saturation characteristic line of the saturation expressed in an X-axis and the intensity expressed in a Y-axis, sets an upper limit and a lower limit of intensity of each saturation as a threshold value based on an area without oil adhesion on the surface of the object, and determines, in the intensity-saturation characteristic line, an area corresponding to a pixel group where the intensity exceeds the threshold value of the upper limit and a pixel group where the intensity falls below the threshold value of the lower limit, to be an oil leakage adhered area.

Oil leakage detector and oil leakage detection method and image processing unit

A leakage oil detection system includes a measurement device including a light source that causes a measured object which includes a leakage oil attachment part to be irradiated with ultraviolet rays, and an imaging device that detects fluorescence emitted from the leakage oil attachment part which is irradiated with the ultraviolet rays, and performs imaging on the measured object; and an analysis device that includes a driving control unit that controls operations of the light source and the imaging device, a recording unit that records an imaged image of the measured object which is imaged by the imaging device, and an image processing unit that calls the imaged image which is recorded in the recording unit and performs an image process to detect leakage oil.

Leakage oil detection system

A stationary induction electrical apparatus includes a disc winding having a structure in which a flow path for a cooling medium is provided between coils where a low voltage is generated between shield wires, an L-shaped insulation barrier is provided between coils where a high voltage is generated between the shield wires, a horizontal portion of the L-shaped insulation barrier is provided so as to closely contact an upper surface or a lower surface of the disc coil, a tip end portion in an axial direction of the L-shaped insulation barrier is provided so as to closely contact an inner surface of the disc coil which is adjacent to a pressboard insulation cylinder, and a height of the tip end portion in the axial direction is lower than a thickness of one coil.

Stationary induction electrical apparatus

Oil leakage detector and oil leakage detection method

An iron core is configured as a winding iron core block group that is obtained in such a manner that winding iron core blocks having rectangular cross-sections each of which is obtained by laminating magnetic metal ribbons with a predetermined width and which have plural widths and laminated thicknesses are arranged in the width direction of the magnetic metal ribbons. The laminated thickness of the winding iron core block located in the middle of the width direction of the magnetic metal ribbons is larger, and the cross-section of each iron core leg is configured substantially in a circular shape by centering the winding iron core blocks in the laminated direction of the magnetic metal ribbons. Upper and lower yokes are arranged in such a manner that the bottom faces of the winding iron core blocks are aligned, and an in-window support member supports the upper yoke on a plane.

For detecting a component of a substance (of liquid or solid) on a front surface of a substrate, the substrate with the substance thereon is transferred into a vaporizing section, the substance is heated in the vaporizing section so that the component is vaporized from the substance in the vaporizing section, the component vaporized is fed from the substance in the vaporizing section to a detecting section, and the vaporized component is detected in the detecting section.

Apparatus and method for detecting vaporized gas

A plasma processing apparatus is provided with at least one waveguide portion for introducing microwaves, an electron heating space chamber formed on a downstream side with respect to a dielectric body in the waveguide portion, and a plasma generating space chamber coupled with the electron heating space chamber. A first static magnetic field generating device surrounds the electron heating space chamber using permanent magnets, producing a strong magnetic field exceeding an electron cyclotron resonance magnetic field strength along a propagation direction of the microwave in the electron heating space chamber and in a microwave leading-out portion of the dielectric body, and forming a cusped magnetic field. This cusped magnetic field falls steeply from a position of electron cyclotron resonance magnetic field strength to a boundary portion between the electron heating space chamber and the plasma generating space chamber and its direction is reversed to that of the strong magnetic field with decreasing distance from the boundary portion between the electron heating space chamber and the plasma generating space chamber to the plasma generating space chamber. A second static magnetic field generating device is provided with permanent magnets arranged around the plasma generating space chamber. Adjacent ones of the permanent magnets have polarities opposite to each other.

Plasma processing apparatus and plasma processing method using the same

In order to uniformly neutralize a large current and a large diameter ion beam so as to irradiate an ion beam having a reduced beam divergence on a process target, an ion beam processing apparatus comprises an ion source for producing a processing plasma, a processing chamber as a vacuum chamber for accommodating a process target, an extract electrode for extracting an ion beam so as to irradiate on said process target, an annular electrode disposed in said processing chamber for forming an annular magnetic field therein, through which said ion beam is irradiated on said process, and a wave guide for introducing microwave through an opening provided on a wall forming said processing chamber, into said annular magnetic field.

Ion beam processing apparatus for processing work piece with ion beam being neutralized uniformly

Dielectric bodies are arranged in waveguide portions for passing microwave radiation and for holding a plasma generating chamber 25 at a vacuum. The dielectric bodies are arranged to intersect at least an electron cyclotron resonance area of the waveguide portions. A tip end portion of the dielectric bodies at a side of the plasma generating chamber are positioned toward at a side of the plasma generating chamber from an intermediate portion in an axial direction length of a first permanent magnet which is arranged by enclosing an outer periphery of the waveguide portions, and a tip end portion of the dielectric bodies at a side of the plasma generating chamber is substantially consistent with an inner face of the plasma generating chamber.

Plasma processing apparatus with a dielectric body in the waveguide

When neutralized plasma is generated, the cylindrical electrode 8 is set at a negative potential against the processing chamber 23 by the DC power source 18, so that ions 23 in the neutralized plasma can be collected at the cylindrical electrode 8. Electrons 24 equal to the collected ion charge can be supplied uniformly toward the ion beam 25. Therefore, by allowing the cylindrical electrode to collect ions, the ion collection area can be spread easily, and only by generating neutralized plasma of low density, a sufficient volume of ions can be collected surely from the plasma and a sufficient volume of electrons can be supplied to the ion beam 25 at the same time.

Ion beam processing apparatus

A microwave plasma generator, wherein permanent magnets 3 forms intense magnetic field exceeding an intensity of electron cyclotron resonance magnetic field at microwave exit 6a of a dielectric body in an electron heating space chamber, the intensity of the magnetic field formed by the permanent magnet decreases rapidly to the zero at a point 14 in the vicinity of the boundary of the electronic heating space camber 1 and a plasma generating space chamber 2, and accordingly, most of electrons can be absorbed into electrons to heat and form high energy electrons at a position 12a-12c in electron cyclotron resonance layer 12.

Microwave plasma generator

Growing community of inventors

Tokyo, Japan

Satoshi Ichimura