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1. 发明专利

JPH03124890A CABLE CONTAINING INCORPORATED OPTICAL FIBER 失效
公开(公告)号：JPH03124890A
公开(公告)日：1991-05-28
申请号：JP26256189
申请日：1989-10-06
申请人： NIPPON STEEL CORP , SUMITOMO ELECTRIC INDUSTRIES
发明人： SEKIDA KINJI , FUSHIDA TAKASHI , MURATA YOSHIKAZU , YAMAGUCHI MASAYOSHI
IPC分类号： G02B6/44 , D07B1/16 , D07B9/00 , H02G15/02
摘要： PURPOSE:To obtain the subject cable having data communication function, etc., in addition to the function of mooring member while preventing the deterioration of optical fiber in the casting of a copper-zinc alloy by providing a metallic pipe containing an optical fiber and taking the metallic pipe out of a socket frame at a specific position. CONSTITUTION:The main body 10 of the cable is produced by twisting a metallic pipe 12 containing an optical fiber 14 and a number of steel wires 11 and applying an outer covering layer 13 to the surface. Sockets are applied to both ends of the cable main body 10. The steel wires 11 are cut before the blind patch 5 of the socket and the metallic pipe 12 is taken out of the socket frame 1 at a part before a copper-zinc alloy layer 2 cast into the socket. The through part to extend the metallic pipe 12 out of the socket frame 1 is preferably subjected to water-proofing treatment. Usually, an epoxy resin 3 is poured into the opening part of the socket frame 1 to impart fatigue-resistance to the socket.

2. 发明专利

JPH04138307A STRAIN DETECTING SENSOR 失效
公开(公告)号：JPH04138307A
公开(公告)日：1992-05-12
申请号：JP26275390
申请日：1990-09-28
申请人： SUMITOMO ELECTRIC INDUSTRIES , NIPPON STEEL CORP
发明人： MURATA YOSHIKAZU , YAMAGUCHI MASAYOSHI , YAMAMOTO JUN , FUSHIDA TAKASHI
IPC分类号： G01L1/00 , G01B11/16 , G02B6/00
摘要： PURPOSE:To improve measuring accuracy by fixing an optical fiber at a constant interval, and providing the freedom of lateral movement for the optical fiber between the fixing points. CONSTITUTION:Under the state wherein a spacer 2 is made to elongate into the specified length in an elastic region, and optical fiber 1 is inserted in a groove 3. After the fiber is fixed with bonding agent 4 at a constant pitch, the tension of the spacer 2 is released. Then, required compression strain is applied on the optical fiber 1 with the elastic restoring force of the spacer 2. Strain sensors 10 and 10' are attached to the upper and lower sides of a pipe 11 which is provided on the ground or mebedded in the ground. The deflections of the pipe 11 in the upper and lower directions are detected. Namely, when the pipe 11 is deflected from the linear state, the (a) part of the sensor 10 and the (b) part of the sensor 10' undergo the compression strains in the respective axial directions. Therefore, the spacer 2 is deflected at, e.t. the (a) part. The optical fiber is displaced in the direction where the freedom in the lateral movement is present and curved. The radius of curvature of the optical fiber between the fixing points at this time is always constant when the amount of strain is equal. Therefore, the amount of strain of the pipe can be accurately detected based on the amount of optical transmission loss whose relation to the amount of strain is constant.

3. 发明专利

JPH04212004A DISTORTION SENSOR 失效
公开(公告)号：JPH04212004A
公开(公告)日：1992-08-03
申请号：JP449791
申请日：1991-01-18
申请人： SUMITOMO ELECTRIC INDUSTRIES , NIPPON STEEL CORP
发明人： TERAKUBO SATOSHI , MURATA YOSHIKAZU , YAMAGUCHI MASAYOSHI , INAMI RYUICHI , FUSHIDA TAKASHI , SEKIDA KINJI , MORI KATSUHIRO
IPC分类号： G01B11/16 , G01L1/00 , G02B6/44
摘要： PURPOSE:To apply bending to an optical fiber and stably sense a change in light transmission loss by housing the optical fiber in a metal tube which is continuously bent wavily at constant intervals. CONSTITUTION:A distortion sensor comprises a metal tube 1 which is continuously bent wavily with constant intervals and an optical fiber 2 bent with the same intervals housed in the tube 2 while gaps are filled with resin 3. For example, a stainless steel pipe wherein bend pitch P=6.5mm, full amplitude D1=1.1 mm, outer diameter D2=0.8mm, inner diameter D3=0.5mm and full length 1=50cm is used as the metal tube 1. Although stainless steel is excellent in resistance to weather as the metal tube, a line material which is subjected to groove treatment with an optical fiber housed in the groove may be used. By housing the optical fiber 2 in the metal tube 1 which is bent with constant intervals, the optical fiber 2 is subjected to bending with the constant intervals, so that a change in light transmission loss can be stably sensed.

4. 发明专利

JPH03124889A CABLE CAPABLE OF INCORPORATING OPTICAL FIBER 失效
公开(公告)号：JPH03124889A
公开(公告)日：1991-05-28
申请号：JP26256089
申请日：1989-10-06
申请人： NIPPON STEEL CORP , SUMITOMO ELECTRIC INDUSTRIES
发明人： SEKIDA KINJI , YAMASHITA ATSUSHI , MURATA YOSHIKAZU , YAMAGUCHI MASAYOSHI
IPC分类号： G02B6/44 , D07B1/16 , D07B9/00 , H02G15/02
摘要： PURPOSE:To provide the subject product having a specific construction enabling the insertion of an optical fiber into a metallic pipe of the main body of cable after the completion of the cable, free from the melt-breakage of optical fiber, etc., producible at a low cost and having a data-communication function, etc., in addition to the function of mooring member. CONSTITUTION:The main body 10 of the cable is produced by twisting a metallic pipe 12 and a number of steel wires 11 and applying an outer covering layer 13 to the surface. Sockets are applied to both ends of the cable main body 10. The steel wires 11 are cut before the blind patch 5 of the socket and the metallic pipe 12 is extended through the blind patch 5 to enable the insertion of an optical fiber into the metallic pipe 5. The socket is attached to the cable main body 10 e.g. by removing the outer coating layer 13 of the terminal part of the cable main body 10 to expose the steel wires 11 and the metallic pipe, applying a socket frame 1 to the outside, casting a copper-zinc alloy 2 into the frame 1 and, at the same time, pouring an epoxy resin 3 into the frame.

5. 发明专利

JPH04242131A CONTINUOUS BENDING METHOD FOR STRAIN DETECTING SENSOR 失效
公开(公告)号：JPH04242131A
公开(公告)日：1992-08-28
申请号：JP335491
申请日：1991-01-16
申请人： NIPPON STEEL CORP , SUMITOMO ELECTRIC INDUSTRIES
发明人： YAMAMOTO JUN , SEKIDA KINJI , FUSHIDA TAKASHI , MORI KATSUHIRO , MURATA YOSHIKAZU , YAMAGUCHI MASAYOSHI
IPC分类号： G01B11/16 , G01L1/24 , G02B6/00
摘要： PURPOSE:To bend a strain detecting sensor formed by containing an optical fiber into a metal tube, very easily and continuously at the intended interval. CONSTITUTION:A strain detecting sensor comprising a metal tube containing an optical fiber is made to pass in the intermeshing direction between the intermeshing teeth of a pair of bending gears 5 which are driven and rotated with a driving means. Thus, the continuous bending machining is performed on the strain sensor for a specified interval. Shaking force is applied to the part which is not machined.

6. 发明专利

JPH0817212A AIRPLANE WARNING LIGHT DEVICE 失效
公开(公告)号：JPH0817212A
公开(公告)日：1996-01-19
申请号：JP7622593
申请日：1993-03-09
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： HASHIMOTO MAKOTO , FUTAJIMA HIDEAKI , MURATA YOSHIKAZU
IPC分类号： F21S8/00 , F21S1/02
摘要： PURPOSE:To provide sufficient light quantity, and facilitate the maintenance of lamp burn-out, optical fiber rapture, and the like in an airplane warning light device which transmits the light of a light source through optical fibers to a bulb at a high position so as to emit the light. CONSTITUTION:Plural optical fibers are provided so that the respective end portions of the optical fibers are dispersively arranged in a bulb 2. In order to detect lamp burn-out, a light receiving device 6 is installed in a light source device. In order to detect the optical fiber rapture, an optical fiber 3b is installed so as to send back the light in the bulb 2 to a light source device side and a light receiving element 9 is installed so as to receive the light.

7. 发明专利

JPH06291733A OPTICAL FIBER COMMUNICATION SYSTEM 失效
公开(公告)号：JPH06291733A
公开(公告)日：1994-10-18
申请号：JP10053393
申请日：1993-04-01
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： FUTAJIMA HIDEAKI , MURATA YOSHIKAZU
IPC分类号： G02B6/08 , G02B6/28 , G02B6/44 , H04B10/00 , H04B10/25 , H04B10/2507 , H04B10/54 , H04B10/548 , H04B10/12
摘要： PURPOSE:To construct a system receiving a signal in a state that the influence of noise is little at an arbitrary place along an optical fiber by using a leakage type optical fiber and providing a demodulation mechanism where light leaking from an optical fiber side surface is received and it is restored to the original signal on a light receiver. CONSTITUTION:This system is an optical fiber communication system composed of a light source device 1, an optical fiber 2 where light from the light source device 1 is made incident and a light receiver 3 arranged on an arbitrary location along the optical fiber 2, and the light source device 1 has a modulation mechanism changing the light intensity and phases, etc., of a light source in accordance with the change of an inputted signal. In an optical fiber 2, a leakage type optical fiber where light leaks from the side surface is used. The light receiver 3 is provided with a demodulation mechanism receiving light leaking from the side surface of the optical fiber 2 and restoring it to the original signal. By this constitution, a signal can be received at the range where modulated light which is away from a cable reaches without mounting a receiver on the cable itself and a communication system which is strong for electromagnetic waves is provide.

8. 发明专利

JPH05180673A METHOD FOR MEASURING FLOW RATE OF FLUID 失效
公开(公告)号：JPH05180673A
公开(公告)日：1993-07-23
申请号：JP34609491
申请日：1991-12-27
申请人： AGENCY IND SCIENCE TECHN , SUMITOMO ELECTRIC INDUSTRIES
发明人： IITAKA HIROSHI , SATO MUNEZUMI , MURATA YOSHIKAZU , MIYAMOTO TOSHIHARU
IPC分类号： G01F1/32 , G01P5/01 , G02B6/00
摘要： PURPOSE:To achieve a highly accurate and highly reliable measurement of a vibration frequency in a Karman vortex street which is generated within a ductwork by allowing a light in polarization mode which crosses a polarization retention optical fiber to enter and detecting a change frequency of a phase difference of both modes. CONSTITUTION:A cylinder 2 is provided within a ductwork 1 as Karman vortex generator and an optical fiber sensor 3 is provided at the downstream. A polarization retention optical fiber is used as the sensor 3 and a laser beam impinges on the sensor 3 from an HeNe laser 4 with a wavelength of 630mm through a 1/4 wave plate 5 and a lens 6. The laser beam is subjected to circular polarization by the wave plate 5 and then the beam diameter is constricted by the lens 6. A light which is irradiated from the sensor 3 impinges on a light- detection element 9 through a lens 7 and a detection element 8 and a phase difference of both modes of X and Y polarization of light output is observed as light intensity. A signal of phase difference which is converted to an electrical signal by the light-detection element 9 is subjected to frequency analysis by a spectrum analyzer 11 through a detection circuit 10 and a flow rate can be obtained by measuring frequency of the vortex.

9. 发明专利

JPH04332835A CORRECTIVE PROCESSING METHOD OF DISTRIBUTED TEMPERATURE DATA 失效
公开(公告)号：JPH04332835A
公开(公告)日：1992-11-19
申请号：JP10275291
申请日：1991-05-08
申请人： AGENCY IND SCIENCE TECHN , SUMITOMO ELECTRIC INDUSTRIES
发明人： IITAKA HIROSHI , SATO MUNEZUMI , TERAKUBO SATOSHI , MURATA YOSHIKAZU , YAMAGUCHI MASAYOSHI
IPC分类号： G01K3/00 , G01K11/12
摘要： PURPOSE:To obtain temperature data of high measuring precision by a method wherein two or more measuring signals are obtained in respect to the same point by using an optical fiber sensor, these signals are converted into electric signals, measured temperature data of each signal are determined, and correction of removing from each data the effects produced by various factors contained in the measured temperature data in the process of measurement is conducted by making use of the symmetry of the data, at the time of a data analysis after the end of the measurement. CONSTITUTION:A difference between data in going and data in returning is determined by a data difference processing element 34 of a corrective processing apparatus 30 and a slant of a straight line representing the relation of the data on this difference with a distance is determined by a slant computing element 35. Correction of subtracting the product of the value of a half of the slant and each distance from whole data at each position is conducted in a data modifying element 36 and further averaging of the data in going and the data in returning is conducted in an averaging processing element 37.

10. 发明专利

JPH07270637A OPTICAL FIBER FOR CONDENSING SOLAR LIGHT 失效
公开(公告)号：JPH07270637A
公开(公告)日：1995-10-20
申请号：JP5704594
申请日：1994-03-28
申请人： AGENCY IND SCIENCE TECHN , SUMITOMO ELECTRIC INDUSTRIES
发明人： IITAKA HIROSHI , MURATA YOSHIKAZU
IPC分类号： G02B6/00 , C03C13/04 , F21V8/00 , G02B6/028 , G02B6/036 , G02B6/18
摘要： PURPOSE:To directly propagate light obtained by converting the wavelength of solar light into the inside of an optical fiber and to efficiently transmit light energy to a distant part by containing a phosphor converting the light having the wide wavelength out of the solar light made incident from the outside, into the light of the long wavelength stepwise in a core and a clad layer respectively. CONSTITUTION:The optical fiber 10 for condensing solar light is provided with the core 11, the clad layer 12 and a covering layer 13. For example, the phosphor being an organic phosphor and converting the high-energy light of 400-700nm in the wavelength spectrum of the solar light into the light of 700-1000nm is added in the layer 12 and a phosphor being a inorganic phosphor and converting the light of the wavelength 700-1000nm into the light of the wavelength 1000-1600nm by which the transmission loss of the optical fiber is reduced, is added in the core 11. Then, the solar light 17 becomes primary fluorescence 18 by the layer 12 and the fluorescence 18 becomes secondary fluorescence 19 (propagated light 191 and emitted light 192) by the core 11.

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