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1. 发明专利

JPH0572123A MONITORING DEVICE FOR GAS IN INSULATING OIL OF OIL FILLED CABLE 失效
公开(公告)号：JPH0572123A
公开(公告)日：1993-03-23
申请号：JP23011491
申请日：1991-09-10
申请人： TOKYO ELECTRIC POWER CO , HITACHI CABLE
发明人： YAMASHITA RYUZO , ITOI HIROSHI , OSAWA SUSUMU , ANDO YORIO
IPC分类号： G01N21/31
摘要： PURPOSE:To enable constant monitoring of gas in oil which is generated in the insulating oil of an OF cable without suspending the current-carrying to the OF cable. CONSTITUTION:The gas monitoring device is equipped with a separating and catching means 9 for the gas in oil which is installed on a connection box, etc., for the connection of the OF cable and separates and catches the gas in oil consisting of plural components contained in insulating oil from the insulating oil and an optical transmission passage 14 which is installed on the gas separating and catching means and is formed, passing through the environment in which the caught gas in oil of plural components is mixed. Further, the gas monitoring device is equipped with a luminous means 16 which generates the light which has a variety of wave length equal to each absorption spectrum of a plurality of components contained in the gas in oil and superposes the light components having different wave length, light receiving means 22 which separately extracts the light component having a single wave length equal to the above-described absorption spectrum from the light which is formed by the superposition of a variety of wave length and carries out photoelectric conversion, and a transmission means 26 which conducts light by joining the luminous means, light receiving means, and the light transmission passage.

2. 发明专利

JPS61243677A HEATING IN CROSSLINKED POLYETHYLENE EXTRUSION MOLDING 失效
公开(公告)号：JPS61243677A
公开(公告)日：1986-10-29
申请号：JP8471685
申请日：1985-04-19
申请人： TOKYO ELECTRIC POWER CO , HITACHI CABLE
发明人： NAKAHASAMI TOSHIAKI , ANDO YORIO , YAMAGUCHI MASAYUKI
IPC分类号： H01R43/00 , B29C39/10 , B29C39/22 , B29C39/26 , B29C39/38 , B29C45/14 , B29C45/73 , H02G1/14

3. 发明专利

JPH02201133A SENSING METHOD OF DISTRIBUTION TYPE OPTICAL FIBER SENSOR 失效
公开(公告)号：JPH02201133A
公开(公告)日：1990-08-09
申请号：JP1999689
申请日：1989-01-30
申请人： TOKYO ELECTRIC POWER CO , HITACHI CABLE
发明人： OZAWA YASUO , TSUTSUI TERUAKI , YAMAMOTO SATORU , ANDO YORIO
IPC分类号： G01K11/12
摘要： PURPOSE:To accurately measure the temperature of an object which changes according to time or place by deciding whether the change of physical quantity in terms of time is easy or sudden based on the magnitude of a difference between a data group and a main data group obtained just before it with respect to a decision level. CONSTITUTION:Light pulse is made incident from one end of the optical fiber 4 and the distribution of the scattered light of a part along the optical fiber, that is, temperature distribution is obtained by a distribution type sensor which uses an OTDR method for detecting the backscattered light. Then, the data group D1 obtained by performing N1 times of averaging processing less than N0 times of averaging processing in which measuring accuracy in a state where a series of sampling and the change of physical quantity are temporally easy is high is conducted to an averaging processing selection device 2. The group D1 is compared with every data corresponding to the main data group D0 obtained just before it so as to generate a difference DELTAD, which is compared with the decision level so as to obtain a new data group based on the magnitude of the difference by averaging processing. Meanwhile, when the change is sudden, the measurement is performed by setting the data group D1 obtained by N1 times of processing as a new main data group. As a result, temperature distribution arithmetic display 3 is performed.

4. 发明专利

JPH03107735A MAXIMUM TEMPERATURE EVALUATING DEVICE FOR POWER CABLE BURIED UNDERGROUND 失效
公开(公告)号：JPH03107735A
公开(公告)日：1991-05-08
申请号：JP24463189
申请日：1989-09-20
申请人： TOKYO ELECTRIC POWER CO , HITACHI CABLE
发明人： OZAWA YASUO , TSUTSUI TERUAKI , YAMAMOTO SATORU , ANDO YORIO
IPC分类号： G01K3/00 , G01K11/12
摘要： PURPOSE:To obtain a maximum temperature value in a lengthwise direction of power cable by measuring temperatures of each part with a series of optical fibers, thereby obtaining a calorific value of the power cable by calculation, and further obtaining a temperature of cable conductor. CONSTITUTION:Linear temperature distribution on the optical fiber is measured by a temperature distribution measuring device 16 with a series of optical fibers 2 installed nearly along the power cable 10 as sensors. By a maximum temperature evaluation processing device 17, the calorific value of cable 10 is obtained from the measured value of device 16, and also from temperatures on at least two points within a cross-sectional area of installed cable 10, unknown intrinsic thermal resistance and bottom temperature of surrounding soil on that part are obtained and therefrom the temperature of cable 10 within the cross-sectional area of this installation is calculated. In this case, this temperature is relatively obtained in such a manner that the calorific value of cable and thermal condition of soil are obtained by utilizing those and dimensions of buried position and a thermal constant for the main body of cable. This procedure is repeated to obtain the maximum temperature of cable 10 in the lengthwise direction for an overall length of line.

5. 发明专利

JPH0484719A METHOD FOR DETECTING LINEAR DISTRIBUTION DATA 失效
公开(公告)号：JPH0484719A
公开(公告)日：1992-03-18
申请号：JP19791690
申请日：1990-07-27
申请人： TOKYO ELECTRIC POWER CO , HITACHI CABLE
发明人： OZAWA YASUO , ENDO SHIGEHIRO , ANDO YORIO
IPC分类号： G01K11/00 , G01J5/08 , G01J5/10 , G01K11/12 , G01M11/00
摘要： PURPOSE:To make it possible to perform highly accurate linear distribution detection by a plurality of wave detections within an allowable error by correcting a distance component, a time component and a sampling number so that the values become approimately equal to those values at the signal generating positions having a reference wavelength. CONSTITUTION:Up to the case wherein the difference DELTAx(j) between the positions of j(th) Ia and Ib is DELTAx(j) =DELTALa/2, Ia(j) and Ib(j+1) are used. At this time, two S(j) corresponding to (j) is obtained twice. Only one is adopted or the average value of both is adopted in correspondence with the detecting purpose. Thereafter, the obtaining of S(j+1) is repeated based on the combination of Ia(j+1) and Ib(j+2). When the DELTAx of the combination becomes DELTALa/2 or more again, the data in use are shifted by one. In general, when the processing is added in the similar way for every distance of about 2.j.DELTALa/2, the difference between the positions of Ia and Ib which are used for obtaining S is not related to the length of an optical fiber and can be contained within the approximate + or -DELTALa/2.

6. 发明专利

JPS6258822A POLYOLEFIN INSULATED POWER CABLE MOLDED CONNECTION 失效
公开(公告)号：JPS6258822A
公开(公告)日：1987-03-14
申请号：JP19453185
申请日：1985-09-03
申请人： TOKYO ELECTRIC POWER CO , HITACHI CABLE
发明人： NAKABASAMI TOSHIAKI , ANDO YORIO , YAMAGUCHI MASAYUKI
IPC分类号： H02G15/08

7. 发明专利

JPS6145511A Electric cable having moisture absorbing function 失效
标题翻译：具有水分吸收功能的电缆
公开(公告)号：JPS6145511A
公开(公告)日：1986-03-05
申请号：JP16721284
申请日：1984-08-09
申请人： Hitachi Cable , Tokyo Electric Power Co
发明人： KAMINAGA KENJI , KANAMARU KIMIHARU , SUGIYAMA KOICHI , ANDO YORIO , KAJIOKA HIROSHI
IPC分类号： G01N21/3554 , G01N21/35 , G02B6/00 , G02B6/02 , H01B7/32

8. 发明专利

JPH063538A OPTICAL WAVEGUIDE 失效
公开(公告)号：JPH063538A
公开(公告)日：1994-01-14
申请号：JP16591692
申请日：1992-06-24
申请人： HITACHI CABLE
发明人： IMOTO KATSUYUKI , HOSHINO HIROYUKI , ANDO YORIO
IPC分类号： G02B6/122 , G02B6/12 , G02B6/26 , G02B6/30
摘要： PURPOSE:To enable low-loss connection and to facilitate optical axis adjustment without offset at the time of fusing by increasing the strength of connection to optical parts without subjecting the end face of the optical waveguide to mirror finishing and perpendicular polishing. CONSTITUTION:This optical waveguide 1 is formed as a flush type optical waveguide by providing a clad 51 on a glass substrate 4 with a core 3 and coating the surface of the core 3 with a clad 52. The refractive index nw of the core 3 is higher than the refractive index nc of the clads 51 and 52. Circular optical fiber insertion holes 21 and 22 for coupling light into the core 3 by being inserted with the optical fibers are formed at both ends of the optical waveguide 1. The insertion holes 21 and 22 penetrate the substrate 4 from the front surface of the optical waveguide 1 down to the rear surface of the substrate thereby parting the core 3. Both the holes 21 and 22 are bored perpendicularly to the front surface of the optical waveguide and the rear surface of the substrate. These holes 21 and 22 are formed by irradiation with a CO2 laser beam. A light signal is propagated between the optical fiber, the optical waveguide 1 and the optical fiber by the insertion of the optical fibers into the formed holes 21, 22.

9. 发明专利

JPH02252216A TRANSFORMER WITH OPTICAL FIBER 失效
公开(公告)号：JPH02252216A
公开(公告)日：1990-10-11
申请号：JP7181189
申请日：1989-03-27
申请人： HITACHI CABLE
发明人： ANDO YORIO
IPC分类号： H01F27/28
摘要： PURPOSE:To prevent a surface discharge and to facilitate mounting of an optical fiber by disposing the fiber from a high voltage section along the potential of winding in a transformer with the optical fiber, and externally leading it from a position near the ground potential. CONSTITUTION:When an optical fiber for leading internal information of a transformer is mounted therein, it is disposed along the potential of a winding. In case of a winding in which a high voltage winding 9 sequentially becomes, for example, higher voltage from inside toward outside, the fiber 4 is disposed from a high voltage bushing along the potential of the winding to a low voltage section or a neutral point connector 12. Accordingly, the fiber 4 can be lead from a position near the ground potential. A high electric field is applied laterally by disposing it along the potential, but a low electric field is applied longitudinally, thereby preventing a surface discharge in the longitudinal direction. Thus, the fiber is mounted without largely altering an insulation design of the transformer, and its application field can be extended.

10. 发明专利

JPS6058015B2 失效
公开(公告)号：JPS6058015B2
公开(公告)日：1985-12-18
申请号：JP16188079
申请日：1979-12-13
申请人： HITACHI CABLE
发明人： ANDO YORIO , FUKAZAWA MASAKATA , TOMITA HIROYASU
IPC分类号： B29C65/48 , B29C55/00 , B29C65/00 , B29C65/78

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