公开(公告)号：US20210192710A1

公开(公告)日：2021-06-24

申请号：US16771103

申请日：2018-11-05

Applicant: Hitachi, Ltd.

Inventor： Li LU ,  Akira NISHIMIZU ,  Toshiaki ROKUNOHE ,  Akira YAMAGISHI

IPC: G06T7/00 ,  G01C3/02 ,  G01S19/01 ,  G01M3/38

Abstract: Provided is an oil leakage detection apparatus by which oil leakage detection is performed even for colorless oil with high detection accuracy and without complicating the apparatus. The oil leakage detection apparatus of the invention includes a distance measurement unit configured to measure a distance to the oil-input machine, an ultraviolet light source configured to irradiate the oil-input machine with ultraviolet light, a color imaging unit configured to capture an image of the oil-input machine irradiated with ultraviolet light, an image processing unit configured to diagnose oil leakage of the oil-input machine based on the distance measured by the distance measurement unit and the captured image of the color imaging unit, and a display unit configured to display a processed image processed by the image processing unit. Further, an oil leakage detection method of the invention includes measuring a distance from an oil-input machine, irradiating the oil-input device with ultraviolet light, capturing an image of the oil-input machine irradiated with ultraviolet light, diagnosing oil leakage of the oil-input machine based on the measured distance and the captured image, and displaying a processed image after the diagnosis processing.

公开(公告)号：US20180040409A1

公开(公告)日：2018-02-08

申请号：US15550562

申请日：2016-02-03

Applicant: Hitachi, Ltd.

Inventor： Yasunori OONO ,  Naoya MIYAMOTO ,  Akira YAMAGISHI

IPC: H01F27/25 ,  H01F30/10

CPC classification number: H01F27/25 ,  H01F3/10 ,  H01F27/26 ,  H01F27/263 ,  H01F30/10 ,  H01F30/12 ,  H01F2003/106

Abstract: A transformer of the invention includes a core which includes a main leg, a side leg, and a yoke, and a winding wire (5) which is wound around the main leg of the core, inside a tank (40) which is filled with an insulating medium, the main leg of the core includes a main wound core (1) having a square cross-section which is formed by winding the amorphous magnetic ribbon and a sub wound core (2) constituted by silicon steel plates which are stacked with curvatures provided at four sides thereof, and a cross-section of a part, where the winding wire (5) is disposed, in the main leg is approximately a circular shape.

公开(公告)号：US20160133382A1

公开(公告)日：2016-05-12

申请号：US14927784

申请日：2015-10-30

Applicant: Hitachi, Ltd.

Inventor： Sho SUGIYAMA ,  Akira YAMAGISHI ,  Ryoji HIROBE ,  Taku OYAMA

IPC: H01F27/33 ,  H01F27/02

CPC classification number: H01F27/33 ,  H01F27/02

Abstract: Provided is a stationary induction apparatus capable of sufficiently decreasing noise and preventing rainwater and dust from entering between welded portions even when using a method of mounting a sound insulating board between an upper stay and a lower stay. The stationary induction apparatus of the present invention includes a stationary induction apparatus main body, a tank, an upper stay and a lower stay, and a sound insulating board. The tank houses the stationary induction apparatus main body and an insulating material. Each of the upper stay and the lower stay is provided respectively, at least at each of an upper portion and a lower portion of an outer surface of the tank. The sound insulating board is disposed between the upper stay and the lower stay. The sound insulating board is partially weld-joined, at each of both ends, with a supporting member, and a sealing material is provided at an outer periphery of a welded portion of the sound insulating board.

Abstract translation: 提供一种能够充分降低噪声并防止雨水和灰尘进入焊接部之间的固定式感应装置，即使在使用隔离板在上部支撑件和下部支架之间安装隔离板的方法。 本发明的固定式感应装置包括固定式感应装置主体，箱体，上支架和下支架以及隔音板。 储罐装有固定式感应装置主体和绝缘材料。 至少在罐的外表面的上部和下部的每一个上分别设置上支撑件和下支撑件中的每一个。 隔音板设置在上支架和下支架之间。 隔音板在两端分别与支撑构件焊接，在隔音板的焊接部的外周设置有密封材料。

公开(公告)号：US20180204670A1

公开(公告)日：2018-07-19

申请号：US15850206

申请日：2017-12-21

Applicant: Hitachi, Ltd.

Inventor： Naoya MIYAMOTO ,  Yoshio HAMADATE ,  Akira YAMAGISHI ,  Mao KAWAMOTO

IPC: H01F27/34 ,  H01F27/06 ,  H01F27/02 ,  H01F27/12 ,  H01F27/28 ,  H01F27/32 ,  H01F3/14

CPC classification number: H01F27/343 ,  H01F3/14 ,  H01F27/025 ,  H01F27/06 ,  H01F27/12 ,  H01F27/2885 ,  H01F27/289 ,  H01F27/323 ,  H01F27/324 ,  H01F27/346 ,  H01F27/362

Abstract: A stationary induction apparatus includes a main body tank and a stationary induction apparatus main body. The main body is accommodated in the tank. An electrostatic shield ring is placed on the upper and lower end parts of a winding. An electrostatic shield ring has a magnetic ring and two insulating rings vertically fixing the magnetic ring for a spool. A conductive tape is laid on an insulating tape. These tapes are wound around the spool. An insulating tape is wound around the wound tapes. The width of the insulating tape is equal to or greater than the width of the conductive tape. One end of the conductive tape is connected to one end part of the winding and to the magnetic ring. A gap is provided at at least one place on the magnetic ring. The winding direction of the conductive tape is inverted at at least one place.

公开(公告)号：US20180204669A1

公开(公告)日：2018-07-19

申请号：US15861731

申请日：2018-01-04

Applicant: Hitachi, Ltd.

Inventor： Chie KOBAYASHI ,  Naoyuki KURITA ,  Akira YAMAGISHI

IPC: H01F27/34 ,  H01F27/25 ,  H01F27/245 ,  H01F3/04 ,  H01F3/14 ,  H01F3/02 ,  H01F27/26

CPC classification number: H01F27/34 ,  H01F3/02 ,  H01F3/04 ,  H01F3/10 ,  H01F3/14 ,  H01F27/245 ,  H01F27/2455 ,  H01F27/25 ,  H01F27/263 ,  H01F41/0226 ,  H01F41/0233 ,  H01F2003/106

Abstract: An object of the present invention is to improve a mechanical strength and to ensure a low magnetic loss without using a supporting member even when amorphous ribbons are used for an inner core. To attain the object, a stationary induction apparatus core of the present invention includes an inner core formed from the amorphous ribbons and outer cores formed from silicon steel sheets, the outer cores being disposed on two sides of the inner core in a depth direction as opposed to a standing direction of the inner core in such a manner as to sandwich the inner core therebetween.

公开(公告)号：US20180137652A1

公开(公告)日：2018-05-17

申请号：US15869508

申请日：2018-01-12

Applicant: Hitachi, Ltd.

Inventor： Li LU ,  Satoshi ICHIMURA ,  Tomohiro MORIYAMA ,  Jun NUKAGA ,  Toshiaki ROKUNOHE ,  Akira YAMAGISHI ,  Yasutomo SAITO

IPC: G06T7/00 ,  G01V8/00 ,  H04N9/04

Abstract: 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.

公开(公告)号：US20180068785A1

公开(公告)日：2018-03-08

申请号：US15683104

申请日：2017-08-22

Applicant: HITACHI, LTD.

Inventor： Youichirou YAMADA ,  Akira NISHIMIZU ,  Yoshio HAMADATE ,  Akira YAMAGISHI

IPC: H01F30/12 ,  H01F3/12 ,  H01F3/14

CPC classification number: H01F30/12 ,  H01F3/02 ,  H01F3/12 ,  H01F3/14 ,  H01F38/08

Abstract: To provide a safe stationary induction electrical apparatus that prevents a fragment coming off a magnetic shield, wound around an iron core leg portion of the stationary induction electrical apparatus, due to vibrations from being released in a tank accommodating the stationary induction electrical apparatus and thus prevents a trouble such as dielectric breakdown. Moreover, to provide a stationary induction electrical apparatus that does not need to be changed in the dimensions of an iron core for securing an insulation distance due to the placement of a magnetic shield and can reduce a compressive force generated in a winding. A magnetic material is provided in the interiors of insulating members whose interiors are hollow and which are provided in the vicinities of upper and lower ends of the winding wound around the iron core leg portion of the stationary induction electrical apparatus.

公开(公告)号：US20170016796A1

公开(公告)日：2017-01-19

申请号：US15205504

申请日：2016-07-08

Applicant: Hitachi, Ltd.

Inventor： Li LU ,  Satoshi ICHIMURA ,  Tomohiro MORIYAMA ,  Jun NUKAGA ,  Akira YAMAGISHI ,  Yasutomo SAITO

IPC: G01M3/20 ,  G06T7/00

CPC classification number: G01M3/20 ,  G01M3/38 ,  G06T7/0004 ,  H04N5/2256 ,  H04N5/2351 ,  H04N5/2353 ,  H04N9/045

Abstract: There is provided a leakage oil detection system including: a measurement device that includes 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. The imaging device controls exposure according to an exposure control value provided in the imaging device, and the analysis device calls the imaged image which is recorded in the recording unit for the image processing unit, calculates brightness values of respective pixels in the imaged image, determines a maximum brightness value which has the largest value among the brightness values of the respective pixels, compares the maximum brightness value with a reference brightness value which is determined in advance, acquires the exposure control value of the imaging device, in which the nearest brightness value that is smaller than the reference brightness value is acquired, images the measured object again by the imaging device using the acquired exposure control value, transmits the acquired image to the image processing unit, and detects leakage oil by performing the image process by the image processing unit.

Abstract translation: 提供一种漏油检测系统，包括：测量装置，其包括使包含要用紫外线照射的泄漏油附着部的测量对象的光源，以及检测从漏油附件发出的荧光的成像装置 用紫外线照射的部分，对测量对象进行成像; 以及分析装置，其包括控制光源和成像装置的操作的驱动控制单元，记录由成像装置成像的被测量物体的成像图像的记录单元和调用该成像装置的图像处理单元 记录在记录单元中并进行图像处理的成像图像。 成像装置根据成像装置中提供的曝光控制值控制曝光，并且分析装置调用记录在图像处理单元的记录单元中的成像图像，计算成像图像中的各个像素的亮度值，确定 在各像素的亮度值中具有最大值的最大亮度值将最大亮度值与预先确定的参考亮度值进行比较，获取摄像装置的曝光控制值，其中最接近亮度值 小于参考亮度值，利用获取的曝光控制值，通过成像装置再次对被测量物体进行成像，将所获取的图像发送到图像处理单元，并通过图像处理执行图像处理来检测泄漏油 单元。

公开(公告)号：US20160247621A1

公开(公告)日：2016-08-25

申请号：US15018945

申请日：2016-02-09

Applicant: Hitachi, Ltd.

Inventor： Yasunori ONO ,  Akira NISHIMIZU ,  Naoya MIYAMOTO ,  Kohei YAMAGUCHI ,  Akira YAMAGISHI

IPC: H01F27/10

CPC classification number: H01F27/12 ,  H01F27/322 ,  H01F27/323

Abstract: A stationary induction electric apparatus includes an iron core having legs of core and yokes of core; windings wound around the legs of core; coolant for cooling the windings; a cylindrical insulation structure that forms a flow of the coolant around the windings; baffle members alternately provided on the inner wall side and the outer wall side of the cylindrical insulation structure; and adjustment members for constricting the flow of the coolant. The adjustment members are provided on the same side of the respective baffle members and on the respective baffle members.

Abstract translation: 固定式感应电气设备包括具有铁心和铁心的铁芯的铁芯; 缠绕在芯的腿上的绕组; 用于冷却绕组的冷却液; 圆柱形绝缘结构，其形成围绕绕组的冷却剂流; 隔板构件交替地设置在圆柱形绝缘结构的内壁侧和外壁侧; 以及用于收缩冷却剂流动的调节构件。 调节构件设置在相应的挡板构件的相同侧和相应的挡板构件上。

公开(公告)号：US20160133381A1

公开(公告)日：2016-05-12

申请号：US14921480

申请日：2015-10-23

Applicant: Hitachi, Ltd.

Inventor： Takuya OJIMA ,  Akira YAMAGISHI ,  Ryoji HIROBE ,  Taku OYAMA

IPC: H01F27/33

CPC classification number: H01F27/33 ,  H01F27/02

Abstract: The stationary induction apparatus includes: a static induction device main body; a tank accommodating the static induction device main body along with an insulating material; an upper stay for reinforcement and a lower stay for reinforcement provided on at least upper part and lower part of an outer surface of the tank; and a sound insulating board provided between the upper stay and the lower stay. The sound insulating board is connected to the upper stay at its one end via a first support member, and to the lower stay at another end via a second support member. The first support member is entirely joined to the upper stay, and the second support member is entirely joined to the lower stay. The sound insulating board is partially joined respectively to the first support member and to the second support member.

Abstract translation: 固定感应装置包括：静电感应装置主体; 容纳静电感应装置主体以及绝缘材料的容器; 在槽的外表面的至少上部和下部上设置用于加强的上支柱和用于加强的下支撑件; 以及设置在上支架和下支架之间的隔音板。 隔音板通过第一支撑构件在其一端连接到上支柱，并且通过第二支撑构件连接到另一端的下支柱。 第一支撑构件完全连接到上支柱，并且第二支撑构件完全连接到下支柱。 隔音板分别部分地接合到第一支撑构件和第二支撑构件。