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

JP2003247914A BRANCH CHARACTERISTIC INFERRING DEVICE IN BRANCH CONNECTION ELEMENT AND BRANCH CHARACTERISTIC INFERRING METHOD 审中-公开
公开(公告)号：JP2003247914A
公开(公告)日：2003-09-05
申请号：JP2002048485
申请日：2002-02-25
申请人： FUJIKURA LTD , UNIV CHIBA
发明人： TAKASHIMA TORU , NIKAIDO SHINICHI , OMORI TATSUYA , YAMADA MASANORI , OSAWA NORITAKA , FUKUDA TSUNEHIRO , HASHIMOTO KIYONARI , YAMAGUCHI MASATSUNE
IPC分类号： G01M11/02 , G02B6/28
摘要： PROBLEM TO BE SOLVED: To provide a branch characteristic inferring device in an optical fiber coupler capable of simply measuring a phase difference inherent to the optical fiber coupler and provide a branch characteristic inferring method. SOLUTION: Insertion loss data represented by a combination of electric power data converted by an A/D converter 29 by combining so as to branch into one of a plurality of output ports from one of a plurality of input ports provided in the optical fiber coupler 15 is stored in RAM 21. A deviation amount of the insertion loss data is calculated based on the insertion loss data to infer complex transmission matrix A represented by a product of connection coefficient k mn and connection length L of the optical fiber coupler 15 as branch characteristic based on the deviation amount of the insertion loss data. COPYRIGHT: (C)2003,JPO

2. 发明专利

JP2003247887A APPARATUS AND METHOD FOR ESTIMATING LOCATION OF VIBRATION IN OPTICAL FIBERING INTERFEROMETER TYPE VIBRATION DETECTING SENSOR 审中-公开
公开(公告)号：JP2003247887A
公开(公告)日：2003-09-05
申请号：JP2002048486
申请日：2002-02-25
申请人： FUJIKURA LTD , UNIV CHIBA
发明人： TAKASHIMA TORU , NIKAIDO SHINICHI , OMORI TATSUYA , YAMADA MASANORI , OSAWA NORITAKA , FUKUDA TSUNEHIRO , HASHIMOTO KIYONARI , YAMAGUCHI MASATSUNE
IPC分类号： G01B11/00 , G01H9/00
摘要： PROBLEM TO BE SOLVED: To provide an apparatus and a method for estimating the location of vibration in an optical fibering interferometer type vibration detecting sensor capable of detecting the location of a point of the addition of the vibration even in the case that the vibration is impressed at a midpoint in an optical fiber. SOLUTION: A light signal emergent from a light emitting element 1 is branched and made to be emergent onto both ends of the loop-shaped optical fiber 3. Each propagating light propagated clockwise and counterclockwise in the optical fiber 3 is made to be incident onto and coupled by a branching and coupling element 2. The propagating light from the branching and coupling element 2 is made to be incident on and converted into an electric signal by a light receiving element 5. The electric signal is converted into digitized time response data by an A/D converter 27. Fourier conversion is performed on the time response data to compute power spectral data. The frequency of a dip point contained in the power spectral data is retrieved. On the basis of the frequency of the dip point, the distance to the point of the addition of the vibration at which the optical fiber 3 is vibrated at the midpoint is identified. COPYRIGHT: (C)2003,JPO

3. 发明专利

JP2006023230A Optical fiber ring interference type sensor and method for correcting fluctuations in interference light intensity 有权
标题翻译：光纤干涉型传感器和干涉光强度校正方法
公开(公告)号：JP2006023230A
公开(公告)日：2006-01-26
申请号：JP2004203224
申请日：2004-07-09
申请人： Fujikura Ltd , 株式会社フジクラ
发明人： TOKURA TAKESHI , TAKASHIMA TORU , NIIMI SHINICHI
IPC分类号： G01H9/00 , G01D5/353
摘要： PROBLEM TO BE SOLVED: To provide an optical fiber interference type sensor which allows to calculate a phase difference with high precision by performing correction using a predetermined maximum value and a minimum value even when there are fluctuations in interference light intensity or the output of an amplifier circuit.
SOLUTION: The optical fiber interference type sensor comprises an amplification means for amplifying a light signal received by a light receiving element, a level fluctuations amount decision means for monitoring fluctuations in a signal level outputted from the amplification circuit within a predetermined range of time including the initial state, a vibrationless decision means for monitoring whether the fluctuations in the signal level has exceeded a standard level or not, and a correction calculation means for calculating a light level fluctuations correction value by acquiring a voltage level value calculated by a level signal decision means when the signal level is the standard level or less. The phase difference can be thereby calculated, allowing to calculate the phase difference with high precision even when there are fluctuations in the interference light intensity or the output of the amplification circuit.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种光纤干涉型传感器，其通过使用预定的最大值和最小值进行校正，即使干涉光强度的波动或输出也能够以高精度计算相位差的放大器电路。解决方案：光纤干涉型传感器包括用于放大由光接收元件接收的光信号的放大装置，电平波动量判定装置，用于监视从放大电路输出的信号电平的波动在预定范围内包括初始状态的时间，用于监视信号电平的波动是否超过标准电平的无振动判定装置;以及校正计算装置，用于通过获取由电平计算出的电压电平值来计算光电平波动校正值当信号电平为标准电平或更小时，信号判定手段。由此可以计算出相位差，即使在干涉光强度或放大电路的输出存在波动的情况下也可以高精度地计算出相位差。版权所有（C）2006，JPO＆NCIPI

4. 发明专利

JP2004212325A Otdr measuring device and otdr measuring method 审中-公开
公开(公告)号：JP2004212325A
公开(公告)日：2004-07-29
申请号：JP2003002039
申请日：2003-01-08
申请人： Chubu Electric Power Co Inc , Fujikura Ltd , 中部電力株式会社 , 株式会社フジクラ
发明人： KUBO TAKAYUKI , MORIMOTO TOMOJI , TAKASHIMA TORU , ITO HIROBUMI
IPC分类号： G01M11/00 , G01M11/02
摘要： PROBLEM TO BE SOLVED: To provide an OTDR measuring device for identifying an arbitrary cable core wire by using characteristics of Rayleigh backward scattering light.
SOLUTION: A polarization face has varying characteristics in response to vibration applied on an optical fiber 13, and the Rayleigh backward scattering light having the polarization angle is transmitted to a polarizer 25. The Rayleigh backward scattering light transmitting the polarizer 25 is given to a receiver 29 through a beam splitter 23 to be photoelectrically converted, and a signal processing part 31 generates an OTDR waveform expressing variation of a light receiving level of the Rayleigh backward scattering light to be displayed on a display part 33.
COPYRIGHT: (C)2004,JPO&NCIPI

5. 发明专利

JP2002243454A OPTICAL FIBER RING INTERFEROMETER TYPE SENSOR AND SIGNAL DETECTING METHOD THEREOF 失效
公开(公告)号：JP2002243454A
公开(公告)日：2002-08-28
申请号：JP2001034190
申请日：2001-02-09
申请人： FUJIKURA LTD
发明人： TAKASHIMA TORU , NIKAIDO SHINICHI , TOKURA TAKESHI , OMORI TATSUYA
IPC分类号： G01D5/353 , G01C19/72 , G01D5/26
摘要： PROBLEM TO BE SOLVED: To remove dead frequencies in an optical fiber ring interferometer type sensor, i.e., dead zones in an optical fiber loop. SOLUTION: The optical fiber ring interferometer type sensor comprises a looped optical fiber of a sub-loop connected through a branch coupler element to a midway of an optical fiber loop (main loop) acting as a detector for detecting oscillations, etc.

6. 发明专利

JP2002169563A OPTICAL FIBER STRINGED INSTRUMENT USING OPTICAL LOOP INTERFEROMETER AND OPTICAL FIBER SOUND GENERATING METHOD 失效
公开(公告)号：JP2002169563A
公开(公告)日：2002-06-14
申请号：JP2000368851
申请日：2000-12-04
申请人： FUJIKURA LTD , SAKATA DENKI
发明人： NIIMI SHINICHI , NIKAIDO SHINICHI , TAKASHIMA TORU
IPC分类号： G02B26/06 , G10H1/00 , G10H3/06
摘要： PROBLEM TO BE SOLVED: To provide an entirely new musical instrument using optical fibers by utilizing optical loop interferometers. SOLUTION: The musical instrument constitutes a plurality of strings within one optical fiber loop with a system formed with the optical loop interferometers and is so constituted that the differences in the frequencies of the standing waves generated when the optical fibers of the strings are excited are reproduced as sounds by varying the lengths or diameters of the optical fibers of the strings or the tensile force thereof.

7. 发明专利

JP2001041847A FIBER-OPTIC INTERFERENCE-TYPE SENSOR AND METHOD FOR DETECTING FIBER-OPTIC INTERFERENCE-TYPE SIGNAL 失效
公开(公告)号：JP2001041847A
公开(公告)日：2001-02-16
申请号：JP21395999
申请日：1999-07-28
申请人： FUJIKURA LTD
发明人： YAMANAKA TAKAYOSHI , UNAMI YOSHIHARU , TAKASHIMA TORU , NIIMI SHINICHI , NAKAMURA YASUSHI
IPC分类号： G01D5/353 , G01B9/02 , G01B11/16 , G01D5/26 , G01D21/00 , G01H9/00 , G01J5/08 , G01M11/00 , H04B10/00 , H04B10/079 , H04B10/275 , H04B10/22
摘要： PROBLEM TO BE SOLVED: To detect a physical signal, such as the impact, vibration signal, etc., applied to an optical signal with high sensitivity by using a sensor having a simple constitution and using a laser and a loop-like optical fiber. SOLUTION: The phase change caused between a clockwise propagated light ray and a counterclockwise propagated light ray in a loop-like optical fiber 3 by a physical change applied to the fiber 3 is detected, based on the signal outputted from a photoreceptor 224. Then part of the light rays propagated through the fiber 3 is taken out by means of an optical branching element 227 and the signal level of the taken-out light is detected by means of a signal level detecting means 228. In accordance with the signal level, the output level of the photoreceptor 224 is maintained at a prescribed value or higher by means of a light receiving level control means 230. Thus the phase change caused between the clockwise propagated light ray A and counterclockwise propagated light ray B in the fiber 3 by the physical change applied to the fiber 3 is always accurately detected by compensating the line loss of the propagated light rays.

8. 发明专利

JP2001041817A OPTICAL FIBER INTERFERENCE TYPE SENSOR AND OPTICAL FIBER INTERFERENCE TYPE SIGNAL DETECTING METHOD 失效
公开(公告)号：JP2001041817A
公开(公告)日：2001-02-16
申请号：JP21384999
申请日：1999-07-28
申请人： FUJIKURA LTD
发明人： NIIMI SHINICHI , UNAMI YOSHIHARU , TAKASHIMA TORU , NAKAMURA YASUSHI , YAMANAKA TAKAYOSHI
IPC分类号： G01P15/093 , G01B9/02 , G01B11/00 , G01H9/00 , G02B6/00 , H04B10/07 , H04B10/27 , H04B10/29 , H04B10/516 , H04B10/61 , H04B10/02 , H04B10/04 , H04B10/06 , H04B10/142 , H04B10/152
摘要： PROBLEM TO BE SOLVED: To sensitively detect physical signals of shock, vibration, etc., applied to an optical fiber by using a sensor of simple constitution which uses a laser and a loop type optical fiber. SOLUTION: On the basis of a signal outputted from a photoreceptor 12, physical change applied to a loop type optical fiber 3 is detected as the phase change generated between a light A propagating clockwise in the fiber 3 and a light B propagating counterclockwise. A pilot signal of a given frequency is imparted to the fiber by a pilot signal imparting means 14. From a signal outputted through an optical branch coupling element 13, the pilot signal is extracted and the signal level is observed. When the level of the pilot signal is low, the planes of polarization of the clockwise propagation light and the counterclockwise propagation light are operated by a plane of polarization operating means 15. Thereby the level of the pilot signal is maintained to be higher than a predetermined value.

9. 发明专利

JP2007093517A Optical fiber ring interference type sensor 有权
标题翻译：光纤环型干涉型传感器
公开(公告)号：JP2007093517A
公开(公告)日：2007-04-12
申请号：JP2005286186
申请日：2005-09-30
申请人： Fujikura Ltd , 株式会社フジクラ
发明人： TAKASHIMA TORU , NIIMI SHINICHI
IPC分类号： G01B11/00 , G01B9/02 , G02B6/00
摘要： PROBLEM TO BE SOLVED: To discriminate between the local vibration generated by rock fall, an intruder or the like and the vibration applied uniformly to the whole optical fiber ring generated by wind and rain or the like, in an optical fiber ring interference type sensor. SOLUTION: The optical fiber ring interference type sensor has an optical fiber ring, including a ring-like optical path formed of a plurality of optical fibers La and Lb, makes light beams of different wavelengths λ 1 and λ 2 incident to the optical fiber ring, and observes interference light intensity of the light beam of each of wavelengths λ 1 and λ 2 that have passed through the optical fiber ring. The sensor has a vibration-proof mechanism 11 for preventing vibration of an optical fiber near the position calculated as an excitation position, when uniform vibration is applied to the optical fiber ring as a whole. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：为了区分由岩石坠落，入侵者等产生的局部振动和对由风雨等产生的整个光纤环均匀施加的振动，在光纤环干涉型传感器。解决方案：光纤环干涉型传感器具有光纤环，其包括由多根光纤La和Lb形成的环状光路，使得具有不同波长λ 1 和λ 2 入射到光纤环，并观察波长λ 1 和λ 2 的光束的干涉光强度，已通过光纤环。该传感器具有防振机构11，用于当对整个光纤环施加均匀的振动时，用于防止在作为激励位置计算的位置附近的光纤的振动。版权所有（C）2007，JPO＆INPIT

10. 发明专利

JP2004347528A Method and device for optical fiber pair identification 有权
公开(公告)号：JP2004347528A
公开(公告)日：2004-12-09
申请号：JP2003146400
申请日：2003-05-23
申请人： Fujikura Ltd , Nippon Telegr & Teleph Corp , 日本電信電話株式会社 , 株式会社フジクラ
发明人： TAKASHIMA TORU , YAMAMOTO SHIROSHI , SHIRAKI KAZUYUKI , AOYANAGI YUJI
IPC分类号： G01M11/00 , G02B6/00 , G02B6/42
摘要： PROBLEM TO BE SOLVED: To determine the transmission direction of a signal light by one light receiving element which performs a pair identification efficiently while suppressing a transmission loss. SOLUTION: An asymmetrical projection unit 10 which is made rectilinear after making a sigmoid shape, the asymmetrical recessed unit 11 which is made rectilinear after making the sigmoid shape in face to face with the projection unit 10, and a void passage unit 11a which is provided at the recessed unit 11 made the void passage between an optical fiber 3 and the light receiving element 7a, are prepared. After inserting the optical fiber 3 in a gap between the projection unit 10 and the recessed unit 11, the gap is narrowed and supported. Bending is given to the optical fiber 3, a portion of the optical fiber 3 is going to a geometry change from the sigmoid shape to rectilinear shape, the portion of the optical fiber 3 which is just before the geometry change is made to set opposite to the light receiving element 7a via the void passage unit 11a. COPYRIGHT: (C)2005,JPO&NCIPI

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