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1. 发明专利

JPH0792042A LANDSLIDE DETECTING SENSOR AND CENTRALIZED SUPERVISORY SYSTEM USING IT 失效
公开(公告)号：JPH0792042A
公开(公告)日：1995-04-07
申请号：JP23757993
申请日：1993-09-24
申请人： HIGASHI NIPPON RYOKAKU TETSUDO , JAPAN AVIATION ELECTRON
发明人： NOZAWA SHINICHIRO , OGIWARA IKUO , MIYANISHI MASATO , KIMURA TOSHIMI , SHIMAZU HIDETO , SASAKI HIROYUKI , KOSAKA YUZO
IPC分类号： E02D17/20 , G01L5/00 , G02B6/00 , G08B21/00 , G08B21/10
摘要： PURPOSE:To reduce the cost for power source lead-in wiring and establish a centralized supervisory system. CONSTITUTION:Pair type optical fibers 2' are laid over a place to detect landslide from the near ends, and mutually connected in the far ends to return a light. The light of a light source 3 is made incident on the near end of one optical fiber, the intensity of the light propagated to the near end of the other optical fiber is detected by a light detector 4. The operating power is supplied from a common power source part 7 to the light source 3 and the light detector 4. The optical fiber 2 may be laid around from the near end so that at least a going-out passage 2e or a returning passage 2f passes the place to detect landslide. A terminal device 8 for data communication is set near the electronic and optical unit 10 of each sensor 1, and housed in a communication line 12 to transmit the landslide detection data of each sensor to a center device 20, so that the centralized supervision in a center can be performed.

2. 发明专利

JPH0437344A OPTICAL TRANSCEIVER 失效
公开(公告)号：JPH0437344A
公开(公告)日：1992-02-07
申请号：JP14422890
申请日：1990-06-01
申请人： JAPAN AVIATION ELECTRON
发明人： KABARU TATSUO , KOSAKA YUZO
IPC分类号： H04B10/00 , H04B10/07 , H04B10/079 , H04B10/27 , H04B10/278 , H04B10/29 , H04B10/524 , H04L7/04 , H04L12/40
摘要： PURPOSE:To economize and to miniaturize an processor transceiver by providing a monitor pulse addition circuit and a monitor pulse detection circuit among a bus controller, a transmission circuit and a reception circuit so as to make two systems of photodetectors and reception circuits into one system. CONSTITUTION:A monitor pulse addition circuit MA is provided between a bus controller BCi and transmission reception circuits T1, T2, photodetectors PD and reception circuits R having been two systems are reduced into only one system, which is used in common and a monitor pulse detection circuit MD is provided between the reception circuit R and the bus controller BCi. The monitor pulse detection circuit MD checks whether or not monitor pulses mp1, mp2 exist in each frame of a reception signal RD' while its own terminal equipment makes transmission, eliminates the monitor pulses mp1, mp2 from the reception signal RD' and inputs the reception signal RD without the monitor pulses mp1, mp2 to the bus controller BCi. Moreover, when only one monitor pulse exists or no monitor pulse exists, since any fault exists in the signal path of transmission and reception, an error flag EF is inputted to the bus controller BCi.

3. 发明专利

JPH0643056A OPTICAL FIBER CABLE FOR PRESSURE SENSOR 失效
公开(公告)号：JPH0643056A
公开(公告)日：1994-02-18
申请号：JP19526092
申请日：1992-07-22
申请人： JAPAN AVIATION ELECTRON
发明人： KABARU TATSUO , KOSAKA YUZO , UJIGAWA MASAAKI
IPC分类号： G01L11/00 , G01L1/24 , G02B6/00
摘要： PURPOSE:To make it possible to detect pressure for a long distance. CONSTITUTION:An optical fiber 22 is wound on a thick round-wire state supporting body 21 comprising flexible material such as rubber at the pitch of several centimeters in a spiral state. A protecting tube 23 covers the optical fiber 22. A tensile strength wire 24 is made to pass in the central part of the supporting body 21, and communication optical fibers 25 are provided around the wire 24. As the optical fiber 22 (for sensing), the single-mode fiber of 1.3mu wavelength is used. The diameter of the supporting body 21 is made slightly larger than 30mm. When pressure is received, the supporting body 21 is deformed. The bending radius of the optical fiber 22 at this part becomes less than 15mm. The transmission loss becomes larger rapidly. Thus, the application of the pressure is detected.

4. 发明专利

JPH06300521A DISTRIBUTION MULTIPLEX TYPE OPTICAL FIBER SENSOR 失效
公开(公告)号：JPH06300521A
公开(公告)日：1994-10-28
申请号：JP8726193
申请日：1993-04-14
申请人： JAPAN AVIATION ELECTRON
发明人： ONO ARITAKA , ISHIGAMI MUNEHIRO , KABARU TATSUO , SASAKI HIROYUKI , MOTOHARA SHINJI , AIHARA SHUICHI , KOSAKA YUZO , UJIGAWA MASAAKI
IPC分类号： G01B9/02 , G01B11/00 , G01L11/00
摘要： PURPOSE:To continuously detect a pressure and its impressed position by an optical fiber. CONSTITUTION:In an optical fiber 2 arranged with going and returning parts, branching optical couplers C1-C3 and combining couplers C4-C6, which correspond to each other, are inserted, these are connected together by main part optical fibers 4a-4c, a Mach- Zehnder interferometer M1 is constructed of the main part optical fiber 4a and an auxiliary part optical fiber 4a', which forms an optical path rounding the main part optical fiber 4b in the following stage of the main part, optical fiber 4a, the same interferometer M2 is constructed of the main part optical fiber 4b and the auxiliary part, optical fiber 4b', and plural interferometers are constructed in the same way to be arranged in series, so that a detection signal is obtained from the optical couplers C4-C6. In this case, the relation among the coherent length W of light source light, the optical fiber optical path length difference H between the main part and the auxiliary part, in each of the interferometers, and the optical path length difference D between the optical path length for the auxiliary part, optical fiber in each of the interferometers and the optical path length rounding from the optical coupler belonging to this interferometer to the auxiliary part optical fiber belonging to the interferometer in the following stage, is H

5. 发明专利

JPH06102064A LANDSLIDE DETECTION APPARATUS 失效
公开(公告)号：JPH06102064A
公开(公告)日：1994-04-12
申请号：JP25156092
申请日：1992-09-21
申请人： JAPAN AVIATION ELECTRON
发明人： MOTOHARA SHINJI , KABARU TATSUO , KOSAKA YUZO , SASAKI HIROYUKI , ONO ARITAKA , AIHARA SHUICHI , UJIGAWA MASAAKI
IPC分类号： E02D17/20 , G01D5/26 , G01D5/353 , G01D21/00 , G02B6/00
摘要： PURPOSE:To detect premonitory symptoms or occurrence of a landslide by a method wherein a part of light passing through an optical fiber is taken out and changes of the ratio of components having polarization planes perpendicular to each other and of attenuation quantity of the light are monitored. CONSTITUTION:Light from a light source 2 is inputted and propagated in a polarization maintaining type optical fiber 1 which is laid in a place where a landslide should be monitored. A light P branched by an optical fiber coupler 3 is divided into a vertical polarization component Pv and a horizontal polarization component pH, and they are converted to electric signals SV, SH by light quantity detectors 5A, 5B respectively. The ratio of both components, SV/SH is calculated to compute a stroke by an operating means 6. An operating means 7 calculates the addition of both component, SV+SH and when the ratio and the addition are varied, it is judged that the deformation of the fiber 1 is taken place. That is, the stroke is varied in accordance with the deformation of the fiber 1 so that premonitory symptoms of a landslide are detected. In addition, when great deformation is applied thereon, the addition of SV+SH becomes smaller. When the value becomes smaller than a predetermined value, a warning of the occurrence of a landslide is generated.

6. 发明专利

JPH0634367A TOPOGRAPHICAL DISPLACEMENT SENSOR 失效
公开(公告)号：JPH0634367A
公开(公告)日：1994-02-08
申请号：JP19525792
申请日：1992-07-22
申请人： JAPAN AVIATION ELECTRON
发明人： AIHARA SHUICHI , KABARU TATSUO , KOSAKA YUZO , SASAKI HIROYUKI , ONO ARITAKA , MOTOHARA SHINJI
IPC分类号： G01C7/02 , G01D21/00 , G01L1/24 , G02B6/00
摘要： PURPOSE:To prevent malfunction due to slack or lightning discharge. CONSTITUTION:A spherical part 22b of a pipe-shaped element 22 is fitted in coupling rotatably with another pipe-shaped element 21 at its one end embodied also as a spherical part 21b, while the cylindrical part 22a of the element 22 is fitted in coupling with the other end cylindrical part 21a of the element 21, and a pipe 23 is accomplished in link-and-joint form. An optical fiber 31 is threaded through this link pipe 23. With a landslide etc., the pipe 23 bends at the joint of the two spherical parts 21b, 22b to cause the optical fiber 31 to be bent strongly, which increases optical loss steeply to result in sensing of failure. The pipe 23 does not bend farther than as shown with B to ensure that the optical fiber 31 is protected.

7. 发明专利

JPS63190501A DETECTOR FOR RISE OF PANTOGRAPH 失效
公开(公告)号：JPS63190501A
公开(公告)日：1988-08-08
申请号：JP2323487
申请日：1987-02-02
申请人： RAILWAY TECHNICAL RES INST , JAPAN AVIATION ELECTRON , FUJI ELECTRIC CO LTD
发明人： FUJITA SHINICHIRO , OKADA KIYOSHI , KOSAKA YUZO , YAMAGUCHI TATSUMI , MIYAUCHI HIROJI , INOUE RYOJI
IPC分类号： B60L5/24 , B60L5/32
摘要： PURPOSE:To enable detecting surely a rise of pantograph by turning ON and OFF an optical path for an optical cable through a rotating operation of main shaft accompanying said rise of pantograph. CONSTITUTION:When a pantograph 1 is lowered, an optical path between collimators 16a and 16b is not intercepted by a pin 14. Thus, the light from a light emitting diode 17a within a rise sensor 17 passes through an optical cable 15a, collimators 16a, 16b and an optical cable 15b and is received and sensed by a photosensor 17b. On the other hand, if a frame 5 of the pantograph 1 rises by a turning force of main shafts A, B, the pin also turns with turning of the main shaft A. Accordingly, the pin 14 comes to intercept the optical path between the collimators 16a, 16b so that incident light to the photosensor 17b is also intercepted.

8. 发明专利

JPH0682279A DETECTING EQUIPMENT FOR LANDSLIDE 失效
公开(公告)号：JPH0682279A
公开(公告)日：1994-03-22
申请号：JP23491592
申请日：1992-09-02
申请人： JAPAN AVIATION ELECTRON
发明人： SASAKI HIROYUKI , KABARU TATSUO , ONO ARITAKA , MOTOHARA SHINJI , AIHARA SHUICHI , KOSAKA YUZO , UJIGAWA MASAAKI
IPC分类号： G01D21/00 , G02B6/00
摘要： PURPOSE:To obtain a detecting equipment for a landslide which can detect a premonitory symptom of the landslide as well and by which a distance which can be monitored can be made long. CONSTITUTION:In regard to detecting equipment for a landslide, two optical fibers 3A and 3B are laid in a place where the landslide is to be monitored, and the light having wavelengths of high coherence is propagated through these two optical fibers. By monitoring a change in the phase difference of this propagated light by a light interference detector 5, a change in the configuration of the ground due to the landslide or a premonitory symptom of the landslide is detected.

9. 发明专利

JPH0682277A DETECTING EQUIPMENT FOR LANDSLIDE 失效
公开(公告)号：JPH0682277A
公开(公告)日：1994-03-22
申请号：JP23491392
申请日：1992-09-02
申请人： JAPAN AVIATION ELECTRON
发明人： SASAKI HIROYUKI , ONO ARITAKA , KABARU TATSUO , MOTOHARA SHINJI , AIHARA SHUICHI , KOSAKA YUZO , UJIGAWA MASAAKI
IPC分类号： G01D21/00 , G01D5/26 , G01D5/353 , G02B6/00
摘要： PURPOSE:To detect a landslide automatically and to enable execution of monitoring in a wide range by laying optical fibers in a monitoring place and by catching a change of light propagated through the optical fibers. CONSTITUTION:A light 1' and a light 2' emitted from a first light source 1 of high coherence and a second light source 2 of low coherence respectively are synthesized to be superposed mutually by a synthesizer 3 and made to enter a photocoupler 4. By the characteristics of the coupler 4, the light 1' is made to branch by 50% for both of optical fibers 5A and 5B connected onto the output side of the coupler while the light 2' is outputted to the fiber 5A. A light interference detector 7 monitors mutual changes of phases of the lights 1' propagated through the fibers 5A and 5B. Thereby, a slight change of the configuration of the ground before a landslide can be caught. Out of other output lights 1' and 2' of a photocoupler 6, only the light 2' is divided to be taken out by a wave divider 8 and given to a loss detector 9, which monitors a change in the amount of arrival of the light 2'. When the rate of arrival of the light 2' propagated through the fiber 5A or 5B lowers, the detector 9 detects an increase of a loss and can give information on occurrence of the landslide.

10. 发明专利

JPH0297907A OPTICAL CONNECTOR RECEPTACLE AND OPTICAL CONNECTOR PLUG 失效
公开(公告)号：JPH0297907A
公开(公告)日：1990-04-10
申请号：JP25138988
申请日：1988-10-05
申请人： JAPAN AVIATION ELECTRON
发明人： KASUKAWA TAKASHI , KOSAKA YUZO
IPC分类号： G02B6/36
摘要： PURPOSE:To eliminate the need for an intricate cleaning operation and to obviate the generation of defective connection by providing an air supplying hose insertion hole to the receptacle and providing an air discharge groove to the plug side thereof. CONSTITUTION:The hose insertion hole is provided to the center of an insulator 8 in a body 2 of the receptacle 1 of the optical connector and the air supplying hose 40 is inserted and held therein. On the other hand, the air discharge groove 52 is formed to the insulator 28 of the plug 21. The receptacle 1 and the plug 21 are loosely coupled at the time of connecting both. The air passes the air discharge groove of the plug 21 and is released to the atm. by passing the spacing of a coupling nut 33 when the air is ejected from the air ejection port of the receptacle 1. After the coupling part is cleaned, a nut 33 is strongly tightened up. Dust is thus efficiently removed and the reliability of the connection is improved.

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