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31. 发明专利

JP2000155137A OPTICAL TRANSFORMER AND TRANSFORMER FOR OPTICAL TRANSFORMATION TYPE GAUGE 失效
公开(公告)号：JP2000155137A
公开(公告)日：2000-06-06
申请号：JP33053398
申请日：1998-11-20
申请人： HITACHI LTD
发明人： UCHIDA AKIRA , YAMAGIWA TOKIO , KOBAYASHI MASATOMO , SONE ISAMU , KUBOTA YOSHIMASA , SHIROKURA TOSHIJI
IPC分类号： H01F38/24 , G01R15/06 , G01R15/24
摘要： PROBLEM TO BE SOLVED: To achieve an accurate measurement by supporting a photovoltaic sensor consisting of an electrooptical element, a polarizer, and an analyzer in equipment for power via a damper for damping. SOLUTION: An electrode 3 being supported by an insulator 4 is arranged in a gas insulation device 1, and a primary side capacitor 31 is connected between a central conductor 2 and the electrode 3, is withdrawn to the outside of the gas insulation device 1 via a sealed terminal 5, and is connected to a secondary side capacitor 32. A voltage V1 of the gas insulation device 1 is divided by the capacitors 31 and 32 to obtain a low, partial voltage V2. The partial voltage v2 is further divided by capacitors 33a and 33b and capacitors 34a and 34b to obtain a partial voltage V3, and the voltages V2 and V3 are measured by a photovoltaic sensor 6a. The photovoltaic sensor 6a is mounted to an accommodation box 50 via a damper 40a for damping, and the accommodation box 50 is fixed to a grounding tank 10. As a result, when vibration is applied externally, the vibration is attenuated by a damper 40a for damping and the vibration is only partially transmitted to the photovoltaic sensor 6a.

32. 发明专利

JPH11108964A OPTICAL CURRENT TRANSFORMER 失效
公开(公告)号：JPH11108964A
公开(公告)日：1999-04-23
申请号：JP26646597
申请日：1997-09-30
申请人： HITACHI LTD , KANSAI ELECTRIC POWER CO
发明人： SONE ISAMU , SHIROKURA TOSHIJI , KAWASHIMA KEIZABURO , HAYASHIDA HIROSHI , NAKAGAMA YOSHIAKI
IPC分类号： G01R33/032 , G01R15/24
摘要： PROBLEM TO BE SOLVED: To provide an optical current transformer in which the reflective surface of a peripheral integration type optical CT sensor is protected by a simple structure and the possibility of contamination or damage on the reflective surface is lessened. SOLUTION: The transformer comprises a Faraday effect glass 1 having a central hole penetrating a conductor and an optical path 4 surrounding the through hole. The Faraday effect glass 1 has a reflective surface 5a bending the optical path at right angle and a protective glass 6a is bonded to the reflective surface 5a through air layers 7a-7c. The air layers 7a-7c is conducted with the outer air or enclosed by filling dry air, as required. The protective glass can be provided on the reflective surface by simple structure through the air layers and since the reflective surface is not exposed, handling is facilitated. Consequently, the possibility of contamination or damage on the reflective surface can be lessened significantly.

33. 发明专利

JPH08114631A LIGHT APPLIED VOLTAGE/ELECTRIC FIELD SENSOR 失效
公开(公告)号：JPH08114631A
公开(公告)日：1996-05-07
申请号：JP25320294
申请日：1994-10-19
申请人： HITACHI LTD
发明人： SONE ISAMU , SHIROKURA TOSHIJI
IPC分类号： G01R15/24 , G02F1/05
摘要： PURPOSE: To reduce a measuring error especially generated by a temp. change in a light applied voltage/electric field sensor. CONSTITUTION: The outputs of dividers 8a, 8b at the time of the application of constant voltage to an optical PD (light applied voltage/electric field sensor) at reference temp. are allowed to coincide with each other by signal processing of a differential operation system using P-polarized light and S-polarized light. A means allowing the outputs of the dividers 8a, 8b to coincide with each other at reference temp. is equivalent to a means removing the initial phase shift of polarized light passing through Pockels element to allow circular polarized light to pass and a measuring error due to temp. change is reduced. Effect facilitating the assembling of the sensor is also obtained.

34. 发明专利

JPH0634670A LIGHT-APPLIED CURRENT DETECTOR 失效
公开(公告)号：JPH0634670A
公开(公告)日：1994-02-10
申请号：JP18970692
申请日：1992-07-16
申请人： HITACHI LTD , KANSAI ELECTRIC POWER CO
发明人： SONE ISAMU , HIGAKI MASARU , TAKAHASHI GENJI , MORI ETSUNORI , NISHI YOSHINORI , KUZUSAKA SATOSHI , SHIMIZU MAKOTO , NAKAGAWA HIROTO
IPC分类号： G01R15/24 , G01R19/00 , G01R33/032 , G01R15/07
摘要： PURPOSE:To obtain a light-applied current detector which makes it possible to measure precisely not only an AC current, but also a transient DC current. CONSTITUTION:A light-applied current detector has a magnetosensitive element having a magnetooptical effect, a light source optical system, a polarizing optical system, photoelectric conversion circuits 41P and 41S, reference light quantity computing circuits 42P and 42S for removing outputs corresponding to an AC component and a transient DC component of a current to be measured, from outputs of the photoelectric conversion circuits 41P and 41S, and separation circuits 43P and 43S for subjecting the outputs of the photoelectric conversion circuits 41P and 41S and outputs of the reference light quantity computing circuits 42P and 42S to subtraction and separating and extracting an electric signal corresponding to the current to be measured.

35. 发明专利

JPH04344469A LIGHT-APPLIED DIRECT CURRENT TRANSFORMER 失效
公开(公告)号：JPH04344469A
公开(公告)日：1992-12-01
申请号：JP11759691
申请日：1991-05-22
申请人： HITACHI LTD , KANSAI ELECTRIC POWER CO
发明人： TAKAHASHI GENJI , SAITO TATSU , SONE ISAMU , HIGAKI MASARU , MORI ETSUNORI , KITA EIZO , KUZUSAKA SATOSHI , SHIMIZU MAKOTO , NAKAGAWA HIROTO
IPC分类号： G01R15/24 , G01R33/032
摘要： PURPOSE:To enable direct currents to be measured over a wide area even if the quantity of light is fluctuated at light sources and at a light signal transfer portion by using a Faraday element to eliminate the influence of fluctuations in the quantity of light at the light sources and the light signal transfer portion. CONSTITUTION:Incident light from two light sources 1, 2 of different wavelengths lambda1, lambda2 is guided to a Faraday element 6. A first light wave 3 of the wavelength lambda1 is linearly polarized by a polarizer 5 disposed at the incident end of the element 6 and is allowed to circulate and pass through the element and then undergoes Faraday rotation proportional to a current value. A second light wave 4 of the wavelength lambda2 is not affected by the current to be measured since the light wave 4 is branched 16. At the light emission end of the element 6 a light signal of (lambda1+lambda2) is divided by an analyzer 7 into a P polarized light component and an S polarized light component which are perpendicular to each other, and the light components of (lambda1+lambda2) contained in both the P polarized light component and the S polarized light component are separated whereby four light signal components are obtained. These two P polarized light components and two S polarized light components obtained are transferred to a signal processing circuit 30 on the same light transfer line.

36. 发明专利

JPH01197968A PHOSPHORIC ACID TYPE FUEL CELL AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH01197968A
公开(公告)日：1989-08-09
申请号：JP2070588
申请日：1988-01-30
申请人： HITACHI LTD
发明人： SONE ISAMU , MIKI ATSUSHI , UOZUMI SHOHEI
IPC分类号： H01M8/02
摘要： PURPOSE:To increase performance by forming a unit cell with a catalyst layer, a matrix which retains an electrolyte aqueous solution, and a composite separator having gas impermeable nonporous carbon plate and a porous portion. CONSTITUTION:A unit cell is formed with a matrix 4, a catalyst layer 2 next to the matrix 4, and a composite separator 9, which is positioned on the outside of the catalyst layer 2, comprising a gas impermeable carbon plate 7 and a porous portion 8 in which pores formed with carbon powder or carbon fibers are ramdamly distributed and reaction gas passages are installed. The nonporous carbon plate 7 has a reaction gas separating function and a porous portion 8 supporting function. Since the porous portion 8 and the nonporous carbon plate 7 are stacked in one body, contact resistance between the porous portion 8 and the nonporous carbon plate 7 is eliminated. The performance of a cell is therefore increased.

37. 发明专利

JPS6312323B2 失效
公开(公告)号：JPS6312323B2
公开(公告)日：1988-03-18
申请号：JP19544881
申请日：1981-12-03
申请人： HITACHI LTD
发明人： KADOTANI KENZO , SONE ISAMU
IPC分类号： H01B3/04 , H01B17/56 , H01B17/60 , H01F5/06

38. 发明专利

JPS6316570A OPERATING METHOD FOR FUEL CELL 失效
公开(公告)号：JPS6316570A
公开(公告)日：1988-01-23
申请号：JP15962386
申请日：1986-07-09
申请人： HITACHI LTD
发明人： MIKI ATSUSHI , SONE ISAMU , TANAKA MASANOBU , YAMAGATA TAKEO , TSUTSUMI YASUYUKI
IPC分类号： H01M8/04 , H01M8/06
摘要： PURPOSE:To prolong a fuel cell main body without a fall of an initial performance and complication of a cell structure by increasing the concentration of steam in reforming gas which enters into the fuel cell main body in the latter period of the operation of the fuel cell. CONSTITUTION:With the concentration of steam in reforming gas kept constant, the power generation performance of a fuel cell main body 6 rises gradually in the initial period of the operation, keep an approximately constant condition in the middle period and lowers gradually in the latter period. Therefore, in the latter period of the operation where the power generation performance lowers, the quantity of water which is dewatered from the reforming gas by a steam separator 3 is gradually reduced and the temperature of cooling mediam is controlled to gradually increase the concentration of steam in the reforming gas. Thereby, phosphoric acid which becomes insufficient is diluted so as to controll the quantity of slashed water. Owing to this constitution, lowering of the power generation performance is suppressed so that the service life of the fuel cell main body 6 is prolonged.

39. 发明专利

JPS628462A FUEL CELL POWER GENERATION SYSTEM 失效
公开(公告)号：JPS628462A
公开(公告)日：1987-01-16
申请号：JP14476285
申请日：1985-07-03
申请人： HITACHI LTD
发明人： TSUTSUMI YASUYUKI , SONE ISAMU , UOZUMI SHOHEI , MIKI ATSUSHI , AMEKAWA HIROYUKI , YAMAGATA TAKEO
IPC分类号： H01M8/04 , H01M8/24
摘要： PURPOSE:To realize parallel operation assuring good power generation characteristics by providing a steam separator which is capable of adjusting humidity of fuel gas to each of a plurality of fuel cell stacks. CONSTITUTION:The reformed gas supplied from a gas supply apparatus is supplied in parallel to the fuel cell stacks 1 and 2 through a steam separator 3. The fuel cell stacks 1, 2 are respectively provided with the gas circulation system connecting the gas supply port and exhaust port of the fuel cell consisting of a steam separator 4 of 5 and a circulation blower 5 or 7. Moisture of fuel gas supplied to the fuel cell stacks 1 and 2 can be individually controlled by changing temperature of steam separator 4 or 6 and circulation amount of circulation blower 5 or 7. Thereby, the fuel cell stack in different dependency on moisture can be operated with one gas supply apparatus, it is not longer necessary to equalize dependency on moisture of fuel cell stacks to all stacks thereof and thereby parallel operations can be assured with good power generation characteristics.

40. 发明专利

JPS61292858A FUEL CELL 失效
公开(公告)号：JPS61292858A
公开(公告)日：1986-12-23
申请号：JP13410285
申请日：1985-06-21
申请人： HITACHI LTD
发明人： MIKI ATSUSHI , YAMAGATA TAKEO , UOZUMI SHOHEI , SONE ISAMU , AMEKAWA HIROYUKI , TSUTSUMI YASUYUKI
IPC分类号： H01M8/02 , H01M8/08
摘要： PURPOSE:To easily uniformize thickness of an electrolytic layer, by mixing inorganic particles, which have particle diameter equal to the thickness of the electrolytic layer, into the electrolytic layer. CONSTITUTION:A fuel electrode 1 and oxidizer electrode 2 made of porous graphite are respectively equipped with gas flow paths 3 and 4 which are arranged perpendicular to each other at respective one-sided surfaces of them and besides equipped with catalyst layers 5 and 6 at both facing sides of these electrodes. An electrolytic layer 8 is formed by mixing inorganic particles 9 such as silicon carbide having particle diameter equal to the thickness of the electrolytic layer. A spacer 10 is composed of an acid-proof and heat-proof film such as polytetrafluoroethylene, shaped in a frame whose outer diameter is equal to those of the electrodes, and used for regulating thickness of the electrode surrounding part. By factening the cell with fixed pressure from up and down, the electrolytic layer 8 can be formed with the same thickness as the surrounding part through the inorganic particles 9.

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