专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JP2580737B2 失效
公开(公告)号：JP2580737B2
公开(公告)日：1997-02-12
申请号：JP25579488
申请日：1988-10-13
申请人： HITACHI CABLE
发明人： OKADA KUNIO , SUGYAMA KOICHI , MINAFUJI JUNICHI , KANAMARU KIMIHARU
IPC分类号： G01R31/08

2. 发明专利

JPH0599976A SPECIFYING APPARATUS OF DIRECTION OF FAILURE OF AERIAL WIRE 失效
公开(公告)号：JPH0599976A
公开(公告)日：1993-04-23
申请号：JP26070891
申请日：1991-10-08
申请人： HITACHI CABLE
发明人： MINAFUJI JUNICHI , YAMAGUCHI YUJI
IPC分类号： G01R31/08
摘要： PURPOSE:To maintain a natural arresting function of an aerial wire while securing safety during the work at the normal time, and to considerably correctly specify the direction of the section where a power line bounded by a specific pylon fails at the abnormal time. CONSTITUTION:One end of an aerial wire 21 spanning at the side of a power source adjacent to a specific pylon 32 is insulatively supported, and earthed by an electric fuse 8 which is shut if an electric accident occurs in a power line. An aerial wire 22 spanning at the side of a load adjacent to the specific pylon 32 is provided with a current, sensor 4 to measure the current running therein. The detecting value of the current by the sensor is small when the electric accident occurs at the side closer to the power source than the pylon 32, while it becomes large when the electric accident is brought about at the side closer to the load than the pylon. Therefore, whether the position where the electric accident occurs is at tone power source side or at the load side can be specified by measuring the current flowing in the aerial wire 22.

3. 发明专利

JPH03199981A SYSTEM FOR SPOTTING FAULT SECTION OF TRANSMISSION LINE 失效
公开(公告)号：JPH03199981A
公开(公告)日：1991-08-30
申请号：JP33671589
申请日：1989-12-27
申请人： TOKYO ELECTRIC POWER CO , HITACHI CABLE
发明人： IWAMA TAKAYUKI , KANAMARU KIMIHARU , MINAFUJI JUNICHI
IPC分类号： G01R31/08
摘要： PURPOSE:To judge a section wherein a fault occurs when the phase differences of neighboring two points are largely different by providing a plurality of detecting points along transmission lines, and detecting the phase difference between a voltage with respect to the ground and a current with respect to each phase of the transmission line at each detecting point. CONSTITUTION:A plurality of sensors 2 for spotting a faulty section are provided at a specified interval along transmission lines 1 for the phases of R, S and T of the transmission lines 1. The sensors 2 are suspended from the transmission lines in the vicinity of a steel tower 3. The phase difference between the voltages with respect to the ground in the transmission line 1 to which the sensor belongs and the current with respect to the voltage is detected. The information of the current phase is transmitted to a receiving device 4 on the side of a ground-potential part by radio. The device 4 evaluates the presence or absence of a fault in the transmission line with a part between the sensors 2 and 2 as a unit. The result of the evaluation is transmitted to the upper part of the steel tower 3 through an approach optical fiber 5 and further transmitted to a remote point through a composite overhead earth wire 6 of an optical fiber. The results are collected at a central monitoring station.

4. 发明专利

JPH02234297A FLAT DETECTING INVASION SENSOR 失效
公开(公告)号：JPH02234297A
公开(公告)日：1990-09-17
申请号：JP5388389
申请日：1989-03-08
申请人： TOKYO ELECTRIC POWER CO , HITACHI CABLE
发明人： SAITO KAZUHISA , KANAMARU KIMIHARU , MINAFUJI JUNICHI
IPC分类号： G08B13/183
摘要： PURPOSE:To obtain an invasion sensor having a simple, inexpensive and flat detecting area by arranging a projector so as to face a light receiver array obtained by linearly arranging plural light receivers, and constructing a invasion detecting area with the triangular area using a linearly arranged light receiving element array as a bottom side and a light emitting element as an apex. CONSTITUTION:Projected beams from a projector 110 are received by the all light receivers consisting of a light receiver array 120, optical paths from the projector 110 to the respective light receivers radially spread, and a triangular detecting area 10 using the light receiver array 120 as the bottom side and the projector 110 as the apex is formed. When an invading object interrupts the optical pats, >= one light receiver of the light receiver array 120 does not receive the projected beams. The invasion detecting means specifies the invading position of the object into the detecting area 10 based on the position of the light receiver which does not receive the beams. Thus the inexpensive invasion sensor having the flat invasion detecting area in a simple configuration can be obtained.

5. 发明专利

JPH01238414A INDUCTION POWER SUPPLY DEVICE FOR TRANSMISSION LINE MONITORING SENSOR 失效
公开(公告)号：JPH01238414A
公开(公告)日：1989-09-22
申请号：JP6050488
申请日：1988-03-16
申请人： HITACHI CABLE
发明人： MINAFUJI JUNICHI , SUGIYAMA KOICHI
IPC分类号： G01R31/08 , H02H1/06
摘要： PURPOSE:To obtain the DC power of good quality easily, by shorting the output of a current transformer to obtain AC voltage from aerial wire current when it is on a predetermined voltage level. CONSTITUTION:The output of the secondary winding 2a of a current transformer 2 passed through the aerial earth wire 1a of a transmission line is rectified with a rectification circuit 3 since a thyristor 6 is unconducting at the beginning. If this rectification voltage is not higher than the operating voltage of a Zener diode ZD4, a definite DC voltage can be obtained with a voltage regulator 7. If it is not lower than the operating voltage, the potential at a point y is limited to the operating voltage by the function of the ZD4. Then, the potential at the gate (a point z) of the thyristor 6 connected to a point x will rise and it becomes conducting. When the output of the secondary winding 2a gets to negative polarity and reverse-blocking state, it becomes unconducting. With this repetition, the potential at the point y holds the voltage in which the operating voltage is set at its peak value. By inputting this voltage into the regulator 7, stable DC voltage can be outputted.

6. 发明专利

JPS63129499A BREAKDOWN DETECTION LINE TWISTED BARBED WIRE AND MANUFACTURE THEREOF 失效
公开(公告)号：JPS63129499A
公开(公告)日：1988-06-01
申请号：JP27534886
申请日：1986-11-20
申请人： TOKYO ELECTRIC POWER CO , HITACHI CABLE
发明人： EGAWA MASANAO , TAKAOKA NOBUKI , MINAFUJI JUNICHI
IPC分类号： G08B13/12 , E04H17/04

7. 发明专利

JPS6353502A METHOD FOR LAYING OPTICAL FIBER CABLE ON POWER-TRANSMISSION-LINE STEEL TOWER 失效
公开(公告)号：JPS6353502A
公开(公告)日：1988-03-07
申请号：JP19721386
申请日：1986-08-25
申请人： HITACHI CABLE
发明人： MINAFUJI JUNICHI , ISHIZAWA KOJI
IPC分类号： G02B6/46 , G02B6/00
摘要： PURPOSE:To prevent slippage of an optical fiber cable from a steel tower for power transmission line and to increase in transmission loss of the cable, by working a plastic conduit tube from the outside midway of its laying route so as to fix the optical fiber cable to the conduit tube. CONSTITUTION:An optical fiber cable 1 is housed in a plastic conduit tube 2 and the tube 2 is fixed to the base material 3 of a steel tower by means of a clamping material 4 at regular intervals. Moreover, at the midpoint of the laying route of the cable 1, at least one fixing section 5 to the plastic conduit tube 2 is provided to the cable 1. At the fixing section 5 the plastic conduit tube 2 is cut off for a certain length and a space where the cable 1 is exposed is formed. At both ends of the space tapes 6 are wound around the optical fiber cable 1 and plastic conduit tube 2 and, furthermore, a tape 7 is wound around the whole space. In this way, the optical fiber cable 1 is fixed to the plastic conduit tube 2 to one body at the fixing section 5. Therefore, the tensile force of the optical fiber cable 1 caused by its self weight can be born by the fixing section 5.

8. 发明专利

JPS62212581A APPARATUS FOR LOCATING TROUBLE SECTION OF OVERHEAD TRANSMISSION LINE 失效
公开(公告)号：JPS62212581A
公开(公告)日：1987-09-18
申请号：JP5787086
申请日：1986-03-14
申请人： TOKYO ELECTRIC POWER CO , HITACHI CABLE
发明人： SATO ISAO , EGAWA MASANAO , KANO HITOSHI , MINAFUJI JUNICHI
IPC分类号： G01R31/08 , H02H7/26
摘要： PURPOSE:To enhance the locating accuracy of a trouble section, by using an index showing the possibility of trouble and a function evaluating the possibility of the trouble. CONSTITUTION:The trouble current detected by an earth wire current detection part 1 is analyzed by a current value/phase extraction circuit 8 to calculate a trouble current value and a phase and the index showing the possibility of trouble is calculated from the current value and the phase at every section by an index operation circuit 9. Subsequently, the function evaluating the possibility of trouble having the index as a variable is calculated at every section by an evaluation function operation circuit 10 and a section where the value of the function obtained by an operation part 2 becomes max. is located as a trouble section. By this method, because the trouble is judged by a method based on the magnitude of the evaluation function value different from a method judging trouble on the basis of a threshold value, the trouble section can be located with high accuracy.

9. 发明专利

JP2536362B2 失效
公开(公告)号：JP2536362B2
公开(公告)日：1996-09-18
申请号：JP16992
申请日：1992-01-06
申请人： HITACHI CABLE
发明人： MATSUBARA RYOJI , MINAFUJI JUNICHI
IPC分类号： G01R15/24 , H02G1/02

10. 发明专利

JPH05322962A TRANSMISSION LINE STEEL TOWER INSTALLATION RADIO ANTENNA 失效
公开(公告)号：JPH05322962A
公开(公告)日：1993-12-07
申请号：JP13076792
申请日：1992-05-22
申请人： TOHOKU ELECTRIC POWER CO , HITACHI CABLE
发明人： SATOU YASUYOSHI , MINAFUJI JUNICHI , TAMURA MITSUHARU
IPC分类号： G01R31/08
摘要： PURPOSE:To obtain a radio antenna which is extremely economical, has no problems in terms of electrical isolation, requites no occupation space for installing a steel tower, and can stably receive radio wave which is sent from a high-voltage transmission line. CONSTITUTION:A radio antenna 2 and a radio receiver 4 are provided at a steel tower arm 7 which is located closest to a radio transmitter 1. The radio antenna 2 is a diagonal bracing 10 which constitutes the steel tower arm 7 closest to the radio transmitter 1 and is insulated from the other parts for installation.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式