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1. 发明专利

JP2004028852A Gate opening degree sensor for optical fiber and gate opening degree monitor for optical fiber using it 审中-公开
公开(公告)号：JP2004028852A
公开(公告)日：2004-01-29
申请号：JP2002187273
申请日：2002-06-27
申请人： Hitachi Cable Ltd , 日立電線株式会社
发明人： FUKUSHI MORIHISA , FUKAHORI TOSHIO
IPC分类号： E02B7/20 , G01B11/00 , G01B21/00 , G01D5/26 , G01D5/353 , G01G3/12 , G01G9/00 , G02B6/02 , G02B6/10
摘要： PROBLEM TO BE SOLVED: To provide a highly reliable gate opening degree sensor for optical fiber requiring no power supply, and to provide a gate opening degree monitor using the sensor. SOLUTION: When a gate 20 descends, a flexible moving material 2 also descends and is accumulated on a saucer 3 from the part coming into contact with the saucer 3. When the material 2 is accumulated on the saucer 3, the weight on the saucer 3 increases and a beam 4 bends in accordance with the weight. Since the accumulated amount of the material 2 is proportional to the descending amount of the gate 20, the opening degree of the gate 20 can be indicated by processing the strain caused by the bending of the beam 4 as the change of the wavelength of reflected light by using fiber Bragg gratings 6a and 6b by means of a signal processing section. When the gate 20 ascends, the strain can also be indicated similarly. Since the fiber Bragg gratings 6a and 6b are used for the beam 4 constituting the gate opening degree sensor 1 which detects the opening degree of the gate 20, the sensor 1 is high in reliability and does not require power supply. COPYRIGHT: (C)2004,JPO

2. 发明专利

JP2004191303A Optical fiber flow velocity sensor 审中-公开
公开(公告)号：JP2004191303A
公开(公告)日：2004-07-08
申请号：JP2002362272
申请日：2002-12-13
申请人： Hitachi Cable Ltd , 日立電線株式会社
发明人： FUKAHORI TOSHIO , SAITO KENICHI , OSADA TAKUMA
IPC分类号： G01P5/14 , G01L7/04
摘要： PROBLEM TO BE SOLVED: To provide an optical fiber flow velocity sensor capable of measuring a flow velocity without being affected by weather and river state. SOLUTION: An enclosure 6 is placed in a fluid to be measured, diaphragms 9 are spread at a plurality of locations on the upright surface of the enclosure 6, and the same number of Bourdon tubes 41 as the diaphragms 9 are contained in the enclosure 6. A closed oil chamber 42 connecting between the inside of the diaphragms 9 and the inlets 47 of corresponding Bourdon tubes 41 is formed. In the gaps of the tip ends 45 and base ends 46 of individual Bourdon tubes 41, extension sensors 43 consisting of fiber Bragg grating are bridged and attached. COPYRIGHT: (C)2004,JPO&NCIPI

3. 发明专利

JP2004163219A Optical fiber flow velocity sensor for river bed corrosion, and flow velocity measuring system therefor 审中-公开
公开(公告)号：JP2004163219A
公开(公告)日：2004-06-10
申请号：JP2002328446
申请日：2002-11-12
申请人： Hitachi Cable Ltd , 日立電線株式会社
发明人： FUKAHORI TOSHIO , SAITO KENICHI
IPC分类号： E02B3/00 , G01B11/16 , G01C13/00 , G01L5/00 , G01L9/00 , G01P5/02 , G01P13/00
摘要： PROBLEM TO BE SOLVED: To measure a river bed corrosion condition and a flow velocity in surroundings of corrosion concurrently at a remote site.
SOLUTION: This optical fiber velocity sensor for river bed corrosion is provided with cylindrical casings 11 buried in the river bed or a high-water channel, along depth direction separated with a prescribed space, and formed with a plurality of opening parts 12 directed to the upstream of a river, and pressure detecting parts 20a-20h having FBGs 24a-24f provided respectively to block the opening parts 12 inside the cylindrical casing 11. In the system, soil pressure or water pressure is detected by converting reflected wavelengths in the FBGs 24a-24f into distortion quantities by an optical velocity sensor 40 for the corrosion connected to the remote site, and the corrosion depth of the river bed and the velocity of the water flow are measured thereby.
COPYRIGHT: (C)2004,JPO

4. 发明专利

JP2005114672A Cavity measuring apparatus, inclination measuring apparatus, and cavity inclination measuring apparatus 审中-公开
标题翻译：密封测量装置，测量装置和腔体测量装置
公开(公告)号：JP2005114672A
公开(公告)日：2005-04-28
申请号：JP2003352332
申请日：2003-10-10
申请人： Hitachi Cable Ltd , 日立電線株式会社
发明人： FUKAHORI TOSHIO , OUCHI KEIICHI , SAITO KENICHI
IPC分类号： G01C9/06 , G01B11/00 , G01B11/02 , G01B11/26 , G01D21/00
摘要： PROBLEM TO BE SOLVED: To provide a cavity measuring apparatus, an inclination measuring apparatus, and a cavity inclination measuring apparatus which require no power supply and allow remote measurement, near a waterway member.
SOLUTION: The apparatus for measuring a cavity below the waterway member 1 provided in a river or the like comprises: a weight 11 placed on the ground 2 below the waterway member 1; a wire 10 connected to the weight 11; a pulley 8 around which the wire 10 is wrapped; a cam 12 rotated by the rotation of the pulley 8; a slider 22 being in contact with the cam 12 and which linearly moves according to the rotation thereof; a beam 23 abutting on a part of the slider 22; a fiber Bragg grating 25 fixed to the beam 23; optical fibers 32, 33 connected to the fiber Bragg grating 25; and a light source and a wavelength measuring device connected to the optical fibers 32, 33. When the ground 2 below the waterway member 1 sinks, the weight 11 sinks. Distortion occurs in the fiber Bragg grating 25 according to the amount of sink of the weight 11. By measuring the distortion by the light source and the wavelength measuring device through the optical fibers 32, 33 from a remote place, the cavity below the waterway member 1 is measured.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种在水道构件附近不需要电力供应并允许远程测量的空腔测量装置，倾斜测量装置和腔体倾斜测量装置。解决方案：设置在河流等中的用于测量水路构件1下方的空腔的装置包括：放置在水路构件1下方的地面2上的重物11; 连接到重物11的线10; 绕线10围绕线10缠绕; 通过滑轮8的旋转而旋转的凸轮12; 滑块22与凸轮12接触并根据其旋转直线移动; 抵靠在滑块22的一部分上的梁23; 固定在光束23上的光纤布拉格光栅25; 连接到光纤布拉格光栅25的光纤32,33; 以及连接到光纤32,33的光源和波长测量装置。当水路构件1下方的地面2下沉时，重物11下沉。在光纤布拉格光栅25中根据重量11的吸收量产生失真。通过光源和波长测量装置通过光纤32,33从偏远的地方测量失真，水路下方的空腔 1。版权所有（C）2005，JPO＆NCIPI

5. 发明专利

JP2003050162A Optical fiber folding unit 审中-公开
标题翻译：光纤折叠单元
公开(公告)号：JP2003050162A
公开(公告)日：2003-02-21
申请号：JP2001240922
申请日：2001-08-08
申请人： Hitachi Cable Ltd , Ibaraki Denshi Service Kk , 日立電線株式会社 , 茨城電子サービス株式会社
发明人： IZUMI KATSUO , GENMA AKIRA , FUKAHORI TOSHIO
IPC分类号： G01K11/12 , G01K11/00
摘要： PROBLEM TO BE SOLVED: To provide a small-sized optical fiber folding unit, which uses a shape memory alloy spring elongated at a set temperature and which can be inexpensively manufactured with high reliability. SOLUTION: The optical fiber folding unit 1 detects the temperature change of a circumference due to an increase in a transmission loss by physically folding an optical fiber 54, due to the temperature changes of the circumference. The folding unit 1 previously bends the fiber 54 in a case 2 in a ridge shape, so as to become a radius of curvature immediately before the loss starts to increase, holds the bent fiber 54, and folds the fiber 54 bent in the ridge shape by a restoring force of the shape memory alloy spring 4, due to the temperature change of the circumference.
摘要翻译：要解决的问题：提供一种小型光纤折叠单元，其使用在设定温度下伸长的形状记忆合金弹簧，并且可以以高可靠性廉价制造。解决方案：光纤折叠单元1由于周长的温度变化而由于通过物理折叠光纤54而导致的传输损耗的增加而检测周长的温度变化。折叠单元1预先将纤维54弯曲成脊状的壳体2，以便在损失开始增加之前成为曲率半径，保持弯曲纤维54，并折叠弯曲成脊形的纤维54 通过形状记忆合金弹簧4的恢复力，由于周长的温度变化。

6. 发明专利

JPS59154333A Optical fiber type pressure sensor 失效
标题翻译：光纤型压力传感器
公开(公告)号：JPS59154333A
公开(公告)日：1984-09-03
申请号：JP2871083
申请日：1983-02-23
申请人： Hitachi Cable Ltd
发明人： KOBAYASHI KENJI , MATSUMOTO HIROSHI , SONE FUMIKI , FUKAHORI TOSHIO
IPC分类号： G02B6/00 , G01L11/00 , G01L11/02 , G02B27/28
CPC分类号： G01L11/02
摘要： PURPOSE:To attain an optical fiber type pressure sensor which can have the diameter narrowed and is easy to produce by combining an optical elastic element and a polarization plane maintaining optical fiber. CONSTITUTION:The light from a light source 4 is made incident to a polarization plane maintaining optical fiber 6 through a beam splitter 9, a 1/2 wavelength plate 11, and a microlens 13. This light is propagated as linearly polarized waves in the fiber 6 and is made incident to an optical elastic element 7 through a microlens 14 and a 1/8 wavelength plate 12. The reflected light reflected on a reflective face 8 of the optical elastic element 7 is propagated to the 1/2 wavelength plate 11 in the opposite direction through the same path as the incident light. This reflected light is made incident to a photodetector 52 for measurement through a beam splitter 9 and a polarizing plate 10. When a pressure (p) is applied to the optical elastic element 7 in this constitution, the photo detection level of the photodetector 52 is changed in accordance with the pressure (p). Thus, the optical fiber type pressure sensor which can have the diameter narrowed and is easy to produce is attained.
摘要翻译：目的：通过组合光学弹性元件和维持光纤的偏振平面，获得可以使直径变窄并易于制造的光纤式压力传感器。构成：来自光源4的光通过分束器9，1/2波片11和微透镜13入射到维持光纤6的偏振面上。该光作为线性偏振波传播到光纤通过微透镜14和1/8波长板12入射到光学弹性元件7.反射在光学弹性元件7的反射面8上的反射光传播到1/2波长板11 相反方向通过与入射光相同的路径。该反射光通过分束器9和偏振板10入射到用于测量的光电检测器52.当在该结构中对光弹性元件7施加压力（p）时，光电检测器52的光检测电平为根据压力（p）改变。因此，可以获得直径变窄且容易产生的光纤型压力传感器。

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