JPH04294236A - Sensor for water immersion inside optical fiber composite overhead earth-wire - Google Patents
Sensor for water immersion inside optical fiber composite overhead earth-wireInfo
- Publication number
- JPH04294236A JPH04294236A JP5902991A JP5902991A JPH04294236A JP H04294236 A JPH04294236 A JP H04294236A JP 5902991 A JP5902991 A JP 5902991A JP 5902991 A JP5902991 A JP 5902991A JP H04294236 A JPH04294236 A JP H04294236A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- fiber composite
- composite overhead
- ground wire
- overhead ground
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000013307 optical fiber Substances 0.000 title claims abstract description 75
- 239000002131 composite material Substances 0.000 title claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 238000007654 immersion Methods 0.000 title abstract 2
- 239000000126 substance Substances 0.000 claims abstract description 13
- 238000000253 optical time-domain reflectometry Methods 0.000 claims abstract description 6
- 239000000376 reactant Substances 0.000 claims description 37
- 238000001514 detection method Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 10
- 239000000835 fiber Substances 0.000 claims description 2
- 230000006866 deterioration Effects 0.000 abstract description 3
- 230000008961 swelling Effects 0.000 description 5
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229960002089 ferrous chloride Drugs 0.000 description 3
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 description 3
- 230000000452 restraining effect Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- WDIHJSXYQDMJHN-UHFFFAOYSA-L barium chloride Chemical compound [Cl-].[Cl-].[Ba+2] WDIHJSXYQDMJHN-UHFFFAOYSA-L 0.000 description 2
- 229910001626 barium chloride Inorganic materials 0.000 description 2
- RQPZNWPYLFFXCP-UHFFFAOYSA-L barium dihydroxide Chemical compound [OH-].[OH-].[Ba+2] RQPZNWPYLFFXCP-UHFFFAOYSA-L 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- ZWWCURLKEXEFQT-UHFFFAOYSA-N dinitrogen pentaoxide Chemical compound [O-][N+](=O)O[N+]([O-])=O ZWWCURLKEXEFQT-UHFFFAOYSA-N 0.000 description 2
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 2
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 2
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 2
- 235000019341 magnesium sulphate Nutrition 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- 235000017550 sodium carbonate Nutrition 0.000 description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 description 2
- 235000011152 sodium sulphate Nutrition 0.000 description 2
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 229920000544 Gore-Tex Polymers 0.000 description 1
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 1
- 239000007832 Na2SO4 Substances 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 229910001863 barium hydroxide Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 229910000365 copper sulfate Inorganic materials 0.000 description 1
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011790 ferrous sulphate Substances 0.000 description 1
- 235000003891 ferrous sulphate Nutrition 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000000276 potassium ferrocyanide Substances 0.000 description 1
- XOGGUFAVLNCTRS-UHFFFAOYSA-N tetrapotassium;iron(2+);hexacyanide Chemical compound [K+].[K+].[K+].[K+].[Fe+2].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-] XOGGUFAVLNCTRS-UHFFFAOYSA-N 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、光ファイバ複合架空地
線の劣化原因となる浸水の位置を検知する光ファイバ複
合架空地線内部浸水検知センサに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sensor for detecting water intrusion inside an optical fiber composite overhead ground wire, which detects the position of water intrusion that causes deterioration of the optical fiber composite overhead ground wire.
【０００２】0002
【従来の技術】光ファイバ複合架空地線（ＯＰＧＷ）内
部が一度浸水すると、ＯＰＧＷ内部に水分が残るため、
これが冬期には凍結し、ＯＰＧＷ内部の光ファイバがこ
の応力で断線し、光ファイバによる情報伝送ができなく
なってしまうことが考えられる。従って、万一、水がＯ
ＰＧＷ内に侵入した場合、早期にその位置を検知する必
要があるが、現在は適切な検知方法が無い。[Prior Art] Once the inside of an optical fiber composite overhead ground wire (OPGW) is flooded, moisture remains inside the OPGW.
It is conceivable that this will freeze in the winter, and the optical fiber inside the OPGW will break due to this stress, making it impossible to transmit information using the optical fiber. Therefore, in the unlikely event that the water
When an intruder enters a PGW, it is necessary to detect its position at an early stage, but there is currently no appropriate detection method.
【０００３】液体を検知する方法としては、図５に示す
例が有るが、これは、テンションメンバ１０内の外周部
に膨潤材料１１を配し、この膨潤材料１１の外周部に凹
部１２を設け、この凹部１２に光ファイバ素線１３を添
設するとともに、光ファイバ素線１３を凹部１２に拘束
するための拘束部材１４を配したものである。その構造
物に液体が接触すると、膨潤材料１１が膨潤し、その結
果、膨潤材料１１および光ファイバ素線１３は拘束部材
１４によって拘束されているため応力が発生し、光ファ
イバ素線１３に変形が生じる。この部分では光ファイバ
中を透過する光のマイクロベンド損失によりパワー損失
が発生する。このため、そのパワー損失を検知システム
（ＯＴＤＲ）で観測することにより、被検知液体の存在
位置を検知することができる。As a method for detecting liquid, there is an example shown in FIG. 5, in which a swelling material 11 is placed on the outer periphery of the tension member 10, and a recess 12 is provided on the outer periphery of the swelling material 11. An optical fiber strand 13 is attached to this recess 12, and a restraining member 14 for restraining the optical fiber strand 13 in the recess 12 is arranged. When the liquid comes into contact with the structure, the swelling material 11 swells, and as a result, since the swelling material 11 and the optical fiber strand 13 are restrained by the restraining member 14, stress is generated and the optical fiber strand 13 is deformed. occurs. In this portion, power loss occurs due to microbend loss of light transmitted through the optical fiber. Therefore, by observing the power loss with a detection system (OTDR), the location of the liquid to be detected can be detected.
【０００４】0004
【発明が解決しようとする課題】しかしながら、前記の
液体検知方法は、水分によって膨潤材料が膨潤し、光フ
ァイバにかかる応力を検知する方法であるが、この方法
をＯＰＧＷに用いた場合、光ファイバには、その周囲の
アルミ鋼線等の金属の熱伸縮による応力が、気象状況と
ともに、常に変化しながらかかってくるため、水分によ
る応力か、金属伸縮による応力なのか判断するのが、非
常に難しい。[Problems to be Solved by the Invention] However, in the liquid detection method described above, the swelling material is swollen by moisture and the stress applied to the optical fiber is detected. The stress caused by the thermal expansion and contraction of surrounding metals such as aluminum steel wires is constantly changing with the weather conditions, so it is very difficult to determine whether the stress is due to moisture or the stress due to metal expansion and contraction. difficult.
【０００５】そこで、本発明は、前記した従来技術の問
題点を解消し、光ファイバ複合架空地線の劣化原因とな
る浸水の位置を検知することを可能とした光ファイバ複
合架空地線内部浸水検知センサを提供することにある。Therefore, the present invention solves the above-described problems of the prior art and makes it possible to detect the position of water intrusion that causes deterioration of the optical fiber composite overhead ground wire. The purpose of the present invention is to provide a detection sensor.
【０００６】[0006]
【課題を解決するための手段】前記目的を達成するため
に、本発明に係る光ファイバ複合架空地線内部浸水検知
センサは、水分と化学反応を起こし、発熱または吸熱す
る反応物質を光ファイバ複合架空地線を構成するＯＰユ
ニット内に収容し、光ファイバ複合架空地線内部の少な
くとも１心以上の光ファイバをＯＴＤＲを応用した光フ
ァイバ式温度分布センサ計測器に接続し、光ファイバ複
合架空地線内に侵入した水により前記反応物質の発熱ま
たは吸熱した位置の温度変化を検知するように構成され
たものである。[Means for Solving the Problems] In order to achieve the above-mentioned object, the optical fiber composite overhead ground wire internal water intrusion detection sensor according to the present invention uses a reactive substance that causes a chemical reaction with moisture and generates heat or absorbs heat to be transferred to the optical fiber composite. The optical fiber composite overhead ground wire is housed in an OP unit that constitutes the overhead ground wire, and at least one optical fiber inside the optical fiber composite overhead ground wire is connected to an optical fiber type temperature distribution sensor measuring instrument that applies OTDR. It is configured to detect a temperature change at a position where the reactant generates heat or absorbs heat due to water entering the wire.
【０００７】また、透水性の有るチューブ内に、前記反
応物質を挿入し、これを前記ＯＰユニット内に設置して
構成することもできる。そのチューブの材質として、液
体は透過しないが気体は透過する物質を用いるのが好ま
しい。[0007] Alternatively, the reactant may be inserted into a water-permeable tube, and this may be installed in the OP unit. As the material of the tube, it is preferable to use a substance that does not allow liquid to pass through but allows gas to pass through.
【０００８】[0008]
【作用】本発明において反応物質は、水分と化学反応を
起こし、発熱または吸熱するものでなければならない。[Operation] In the present invention, the reactant must cause a chemical reaction with moisture and generate heat or endotherm.
【０００９】例えば、水分と化学反応を起こし、発熱す
る反応物質としては、塩化カルシウム（ＣａＣｌ２ ）
，塩化第一鉄（ＦｅＣｌ２ ），塩化第二鉄（ＦｅＣｌ
３ ），塩化バリウム（ＢａＣｌ２ ），塩化マグネシ
ウム（ＭｇＣｌ２ ），五酸化二窒素（Ｎ２ Ｏ５ ）
，水酸化カリウム（ＫＯＨ），水酸化ナトリウム（Ｎａ
ＯＨ），水酸化バリウム（Ｂａ（ＯＨ）２ ），炭酸ナ
トリウム（Ｎａ２ ＣＯ３ ）、フェロシアン化カリウ
ム（Ｋ４ Ｆｅ（ＣＮ）６ ），硫酸カルシウム（Ｃａ
ＳＯ４ ），硫酸第一鉄（ＦｅＳＯ４ ），硫酸銅（Ｃ
ｕＳＯ４ ），硫酸ナトリウム（Ｎａ２ ＳＯ４ ），
硫酸マグネシウム（ＭｇＳＯ４ ）があげられる。また
、水分と化学反応を起こし、吸熱する反応物質としては
、尿素（（ＮＨ２ ）２ ＣＯ）と硝安を混合したもの
等があげられる。For example, calcium chloride (CaCl2) is a reactive substance that causes a chemical reaction with moisture and generates heat.
, ferrous chloride (FeCl2), ferric chloride (FeCl2)
3), barium chloride (BaCl2), magnesium chloride (MgCl2), dinitrogen pentoxide (N2 O5)
, potassium hydroxide (KOH), sodium hydroxide (Na
OH), barium hydroxide (Ba(OH)2), sodium carbonate (Na2CO3), potassium ferrocyanide (K4Fe(CN)6), calcium sulfate (Ca
SO4), ferrous sulfate (FeSO4), copper sulfate (C
uSO4), sodium sulfate (Na2SO4),
Examples include magnesium sulfate (MgSO4). Further, as a reactive substance that causes a chemical reaction with moisture and absorbs heat, a mixture of urea ((NH2)2 CO) and ammonium nitrate may be used.
【００１０】その反応物質がＯＰユニット内に収容され
るため、光ファイバ複合架空地線内に水分が侵入すると
、この水分により反応物質が発熱または吸熱する。この
位置の温度変化が光ファイバを介して光ファイバ式温度
分布センサに検知されるので、光ファイバ複合架空地線
の浸水位置を検知することが可能となる。このように、
水分と化学反応を起こす反応物質を用いるため、浸水位
置では温度変化が顕著に現れ、かつその温度変化をＯＴ
ＤＲを応用した光ファイバ式温度分布センサ計測器で検
知するので、浸水位置を正確に感度よく把握することが
可能となる。[0010] Since the reactant is housed in the OP unit, when moisture enters the optical fiber composite overhead ground wire, the reactant generates heat or absorbs heat due to the moisture. Since the temperature change at this position is detected by the optical fiber type temperature distribution sensor via the optical fiber, it becomes possible to detect the flooded position of the optical fiber composite overhead ground wire. in this way,
Because a reactive substance that causes a chemical reaction with moisture is used, there is a noticeable temperature change at the location of the water, and the temperature change can be detected by OT.
Since the detection is performed using an optical fiber type temperature distribution sensor measuring instrument that applies DR, it is possible to accurately and sensitively determine the location of water inundation.
【００１１】また、前記反応物質を挿入したチューブを
ＯＰユニット内に設置することで、光ファイバ複合架空
地線内に水分が侵入すると、この水分はチューブを透過
して反応物質と化学反応を起こすので、前記同様光ファ
イバ複合架空地線内の浸水を検知することが可能となり
、しかも、反応物質をチューブ内に挿入して用いるため
、反応物質のコストを安く抑えられると共に光ファイバ
複合架空地線の低重量化を図れる。さらに、そのチュー
ブの材質に、液体は透過しないが気体は透過する物質を
用いることで、水分だけでなく湿度も検知することが可
能となる。[0011] Furthermore, by installing the tube into which the reactant is inserted in the OP unit, when moisture enters the optical fiber composite overhead ground wire, this moisture passes through the tube and causes a chemical reaction with the reactant. Therefore, it is possible to detect water intrusion in the optical fiber composite overhead ground wire as described above, and since the reactant is inserted into the tube, the cost of the reactant can be kept low and the optical fiber composite overhead ground wire can be detected. The weight can be reduced. Furthermore, by using a material for the tube that is impermeable to liquids but permeable to gases, it becomes possible to detect not only moisture but also humidity.
【００１２】0012
【実施例】以下、本発明の一実施例を添付図面に基づい
て説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.
【００１３】図１は本発明のセンサを示す概略構成図、
図２は本発明を適用した光ファイバ複合架空地線（ＯＰ
ＧＷ）１を示す断面図である。FIG. 1 is a schematic diagram showing the sensor of the present invention;
Figure 2 shows an optical fiber composite overhead ground wire (OP) to which the present invention is applied.
GW) 1 is a cross-sectional view.
【００１４】図２において、１はＯＰＧＷを示し、この
ＯＰＧＷ１は、中心に光ファイバ２を含む筒状のアルミ
製のＯＰユニット３を収納し、この外周にアルミ被覆鋼
線４がより合わせられている。ＯＰユニット３内には、
その中心付近に複数の光ファイバ２が収納されていると
共に、これら光ファイバ２の周囲には水分と化学反応を
起こし、発熱または吸熱する反応物質５が充填されてお
り、そのＯＰユニット３内部に水分が侵入すると、反応
物質５が水分と反応して発熱または吸熱し、光ファイバ
２の温度が変化するようになっている。In FIG. 2, 1 indicates an OPGW, and this OPGW 1 houses a cylindrical aluminum OP unit 3 containing an optical fiber 2 in the center, and an aluminum-coated steel wire 4 is twisted around the outer circumference of the OPGW. There is. Inside OP unit 3,
A plurality of optical fibers 2 are housed near the center, and the periphery of these optical fibers 2 is filled with a reactive substance 5 that causes a chemical reaction with moisture and generates heat or absorbs heat. When moisture enters, the reactant 5 reacts with the moisture to generate heat or absorb heat, and the temperature of the optical fiber 2 changes.
【００１５】このＯＰＧＷ１は、図１に示すように、鉄
塔６，６間を連架され、そのＯＰＧＷ１内の複数の光フ
ァイバのうち例えば図２に示す１心の光ファイバ２ｂが
温度センサ用として（残りは情報伝送用光ファイバ２ａ
）、地上に設置される光ファイバ式温度分布センサ計測
器７に接続される。尚、図１中、８は光ファイバを示し
ている。As shown in FIG. 1, this OPGW 1 is connected between steel towers 6 and 6, and among the plurality of optical fibers in the OPGW 1, for example, one optical fiber 2b shown in FIG. 2 is used as a temperature sensor. (The rest is optical fiber 2a for information transmission.
) is connected to an optical fiber type temperature distribution sensor measuring instrument 7 installed on the ground. Note that in FIG. 1, 8 indicates an optical fiber.
【００１６】光ファイバ式温度分布センサ計測器７は、
ＯＴＤＲ（光学的時間領域反射測定法）を応用して光フ
ァイバ中の散乱光強度が温度により変化することを利用
したものであり、光ファイバに光パルスを入射し、光フ
ァイバ内で発生した散乱光のうち入射側に戻る後方散乱
光の強度変化を検出することにより、温度を測定する。
また、光ファイバに光パルスが入射した時点から散乱光
が入射端に到達する時点までの時間差が、２Ｌ／Ｃ（Ｌ
；光ファイバ入射端から散乱光が生じた位置までの距離
、Ｃ；光ファイバ中の光速）で表されることから、上記
時間差を検出すれば、後方散乱光の生じた位置が評定さ
れる。従って、ＯＰＧＷ１内に侵入した水により発熱ま
たは吸熱した反応物質５の温度変化位置が温度センサ用
光ファイバ２ｂを介して計測器７によって検知されるよ
うになっている。The optical fiber type temperature distribution sensor measuring instrument 7 includes:
This method utilizes the fact that the intensity of scattered light in an optical fiber changes with temperature by applying OTDR (optical time domain reflectometry). Temperature is measured by detecting changes in the intensity of backscattered light that returns to the incident side. In addition, the time difference from the time when the optical pulse enters the optical fiber to the time when the scattered light reaches the input end is 2L/C (L
; distance from the input end of the optical fiber to the position where the scattered light occurs, and C: the speed of light in the optical fiber). Therefore, by detecting the above-mentioned time difference, the position where the backscattered light occurs can be evaluated. Therefore, the temperature change position of the reactant 5 that has generated heat or absorbed heat due to the water that has entered the OPGW 1 is detected by the measuring device 7 via the temperature sensor optical fiber 2b.
【００１７】さて、ＯＰＧＷ１のある位置に水分が侵入
すると、その水分はＯＰＧＷ１内に充填されている反応
物質５と化学反応を起こし、反応物質５が発熱または吸
熱する。このように、水分と化学反応を起こす反応物質
５を用いることにより、水分侵入位置では反応物質５の
温度変化が顕著に現れ、その反応物質５の温度変化によ
り光ファイバ２の温度が顕著に変わる。このため、セン
サ用光ファイバ２ｂでその温度変化を他の温度変化と誤
ることなく検知することができ、これを地上の光ファイ
バ式温度分布センサ計測器７で測定するので、浸水位置
を感度よく検知することができる。例えば反応物質５に
水分と反応して発熱する物質を用いると、図３に示めす
測定例のようになり一目で水分侵入位置がわかる。Now, when moisture enters a certain position of the OPGW 1, the moisture causes a chemical reaction with the reactant 5 filled in the OPGW 1, and the reactant 5 generates heat or absorbs heat. In this way, by using the reactant 5 that causes a chemical reaction with moisture, the temperature of the reactant 5 will noticeably change at the position where moisture enters, and the temperature of the optical fiber 2 will change noticeably due to the temperature change of the reactant 5. . Therefore, the sensor optical fiber 2b can detect the temperature change without mistaking it for other temperature changes, and this is measured by the ground-based optical fiber type temperature distribution sensor measuring instrument 7, so the flooded position can be detected with high sensitivity. Can be detected. For example, if a substance that reacts with moisture and generates heat is used as the reactant 5, the measurement example shown in FIG. 3 will be obtained, and the position of moisture intrusion can be determined at a glance.
【００１８】したがって、本発明に係る光ファイバ複合
架空地線内部浸水検知センサは、水分と化学反応を起こ
す反応物質５を用いると共に、その温度変化をセンサ用
光ファイバ２ｂを介して光ファイバ式温度分布センサ計
測器７で測定するので、従来浸水検知をすることができ
なかったＯＰＧＷ１の浸水位置を正確に感度よく把握す
ることができる。これにより、水の凍結によるＯＰＧＷ
１内部の情報伝送用光ファイバ２ａの断線等の事故を未
然に防ぐことができる。また、反応物質５として水分量
に応じて温度変化例えば上昇する物質を用いることによ
り、その温度上昇値から侵入した水分量をも把握するこ
とができる。Therefore, the optical fiber composite overhead ground wire internal water intrusion detection sensor according to the present invention uses the reactant 5 that causes a chemical reaction with moisture, and detects the temperature change through the optical fiber 2b for the sensor. Since the measurement is performed using the distributed sensor measuring instrument 7, the location of flooding in the OPGW 1, which could not be detected conventionally, can be accurately and sensitively determined. As a result, OPGW due to water freezing
Accidents such as breakage of the information transmission optical fiber 2a inside the optical fiber 2a can be prevented. Further, by using a substance whose temperature changes, for example, rises, depending on the amount of water as the reactant 5, the amount of water that has entered can also be determined from the temperature rise value.
【００１９】図４は光ファイバ複合架空地線（ＯＰＧＷ
）１内のＯＰユニット３に上記反応物質を収納させる他
の実施例を示す断面図である。図示するように、透水性
のチューブ９内に反応物質５を充填し、これがＯＰユニ
ット３内の光ファイバ２の外周の空間に収容されている
。チューブ９は、ＯＰユニット３より径が小さく、その
内部に充填される反応物質５の水分による温度変化でセ
ンサ用光ファイバ２ｂの温度を顕著に変化させえるよう
に形成されている。そのチューブ９の材質としては、例
えば、透水性のビニル等のプラスチックを材質としても
良いし、ナイロン等の繊維を織ってチューブ状にしたも
のであっても良い。FIG. 4 shows an optical fiber composite overhead ground wire (OPGW).
) 1 is a cross-sectional view showing another embodiment in which the above-mentioned reactant is stored in the OP unit 3 in 1. As shown in the figure, a water-permeable tube 9 is filled with a reactant 5, which is housed in a space around the optical fiber 2 in the OP unit 3. The tube 9 has a smaller diameter than the OP unit 3, and is formed so that the temperature of the sensor optical fiber 2b can be significantly changed by a temperature change caused by the moisture in the reactant 5 filled inside the tube 9. The material of the tube 9 may be, for example, water-permeable plastic such as vinyl, or may be made of woven fibers such as nylon into a tube shape.
【００２０】このように構成することによって、ＯＰユ
ニット３内に水分が侵入すると、この水分はチューブ９
を透過して反応物質５と反応し、反応物質５が十分に発
熱または吸熱するので、ＯＰユニット３内に反応物質５
が充填されていなくても、反応物質５の温度変化により
センサ用光ファイバ２ｂの温度が顕著に変化することに
なる。これにより、上記実施例とほぼ同様の作用効果を
発揮してＯＰＧＷ１の浸水位置を正確に感度よく把握す
ることができ、しかも、反応物資５をチューブ内に充填
して用いているため、上記実施例に比して反応物資５の
コストを安く抑えられると共に、ＯＰＧＷ１の重量を軽
くする等の長所を有する。With this configuration, when moisture enters the OP unit 3, this moisture is absorbed into the tube 9.
The reactant 5 passes through the OP unit 3 and reacts with the reactant 5, and the reactant 5 sufficiently generates or absorbs heat, so the reactant 5 is inside the OP unit 3.
Even if it is not filled, the temperature of the sensor optical fiber 2b will change significantly due to a change in the temperature of the reactant 5. As a result, it is possible to exhibit almost the same effect as in the above embodiment, and to grasp the flooded position of the OPGW 1 accurately and with high sensitivity.Moreover, since the reactant material 5 is used by being filled in the tube, the above embodiment can be carried out. Compared to the example, the cost of the reactant 5 can be kept low, and the weight of the OPGW 1 can be reduced.
【００２１】また、チューブ９の材質に、液体は透過し
ないが気体は透過する物質（例えば、ゴアテックス（商
品名））を用いることで、ＯＰユニット３内のガス状の
水分（水蒸気）がチューブ９内に透過し、この水蒸気と
反応物質５が反応して発熱または吸熱するので、水分だ
けでなく湿度も検知することができる。Furthermore, by using a material for the tube 9 that is impermeable to liquid but permeable to gas (for example, Gore-Tex (trade name)), gaseous moisture (water vapor) in the OP unit 3 is transferred to the tube. The water vapor permeates into the reactant substance 9 and reacts with the reactant substance 5 to generate heat or absorb heat, so that not only moisture but also humidity can be detected.
【００２２】[0022]
【発明の効果】以上要するに本発明によれば、光ファイ
バ複合架空地線の浸水位置を検知できる。また、反応物
質を挿入したチューブをＯＰユニット内に設置すること
により、反応物質のコストを安く抑えられると共に光フ
ァイバ複合架空地線の低重量化をも図れる。さらに、チ
ューブの材質に、液体は透過しないが気体は透過する物
質を用いることにより、水分だけでなく湿度も検知でき
る。In summary, according to the present invention, it is possible to detect the location of flooding in an optical fiber composite overhead ground wire. Moreover, by installing the tube into which the reactant is inserted in the OP unit, the cost of the reactant can be kept low, and the weight of the optical fiber composite overhead ground wire can also be reduced. Furthermore, by using a material for the tube that is impermeable to liquids but permeable to gases, it is possible to detect not only moisture but also humidity.
【図１】本発明に係る光ファイバ複合架空地線内部浸水
検知センサを示す概略構成図である。FIG. 1 is a schematic configuration diagram showing an optical fiber composite overhead ground wire internal water intrusion detection sensor according to the present invention.
【図２】本発明に係る光ファイバ複合架空地線を示す断
面図である。FIG. 2 is a sectional view showing an optical fiber composite overhead ground wire according to the present invention.
【図３】浸水位置を本発明に係るセンサで検出した一例
を示す図である。FIG. 3 is a diagram showing an example of a flooded position detected by a sensor according to the present invention.
【図４】本発明に係る光ファイバ複合架空地線内のＯＰ
ユニットに反応物質を収納させる他の実施例を示す断面
図である。[Fig. 4] OP in the optical fiber composite overhead ground wire according to the present invention
FIG. 7 is a cross-sectional view showing another embodiment in which a reactant is housed in a unit.
【図５】従来の液体検知センサの一例を示す図である。FIG. 5 is a diagram showing an example of a conventional liquid detection sensor.
１ 光ファイバ複合架空地線
２ 光ファイバ
３ ＯＰユニット
５ 反応物質
７ 光ファイバ式温度分布センサ計測器９ チュー
ブ1 Optical fiber composite overhead ground wire 2 Optical fiber 3 OP unit 5 Reactant 7 Optical fiber type temperature distribution sensor measuring device 9 Tube
Claims (3)
吸熱する反応物質を光ファイバ複合架空地線を構成する
ＯＰユニット内に収容し、光ファイバ複合架空地線内部
の少なくとも１心以上の光ファイバをＯＴＤＲを応用し
た光ファイバ式温度分布センサ計測器に接続し、光ファ
イバ複合架空地線内に侵入した水により前記反応物質の
発熱または吸熱した位置の温度変化を検知することを特
徴とする光ファイバ複合架空地線内部浸水検知センサ。Claim 1: A reactive substance that causes a chemical reaction with moisture and generates or absorbs heat is housed in an OP unit constituting an optical fiber composite overhead ground wire, and at least one optical fiber inside the optical fiber composite overhead ground wire is provided. is connected to an optical fiber type temperature distribution sensor measuring device applying OTDR, and detects a temperature change at a position where the reactant generates heat or absorbs heat due to water that has entered the optical fiber composite overhead ground wire. Fiber composite overhead ground wire internal water intrusion detection sensor.
物質を挿入し、これを前記ＯＰユニット内に設置したこ
とを特徴とする請求項１の光ファイバ複合架空地線内部
浸水検知センサ。2. The optical fiber composite overhead ground wire internal water intrusion detection sensor according to claim 1, wherein the reactant is inserted into a water-permeable tube, and this is installed in the OP unit.
過しないが気体は透過する物質を用いることを特徴とす
る請求項２の光ファイバ複合架空地線内部浸水検知セン
サ。3. The optical fiber composite overhead ground wire internal water intrusion detection sensor according to claim 2, wherein the tube is made of a material that does not allow liquid to pass therethrough but allows gas to pass therethrough.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5902991A JPH04294236A (en) | 1991-03-22 | 1991-03-22 | Sensor for water immersion inside optical fiber composite overhead earth-wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5902991A JPH04294236A (en) | 1991-03-22 | 1991-03-22 | Sensor for water immersion inside optical fiber composite overhead earth-wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04294236A true JPH04294236A (en) | 1992-10-19 |
Family
ID=13101457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5902991A Pending JPH04294236A (en) | 1991-03-22 | 1991-03-22 | Sensor for water immersion inside optical fiber composite overhead earth-wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04294236A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007003231A (en) * | 2005-06-21 | 2007-01-11 | Chugoku Electric Power Co Inc:The | Method and system for determination of water penetration into optical fiber cable |
| JP2007003232A (en) * | 2005-06-21 | 2007-01-11 | Chugoku Electric Power Co Inc:The | Water penetration determination method for optical fiber cable and maintenance method for optical fiber cable |
| CN109891207A (en) * | 2016-11-07 | 2019-06-14 | Abb瑞士股份有限公司 | Industrial robot for food industry, including leak detecting device |
-
1991
- 1991-03-22 JP JP5902991A patent/JPH04294236A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007003231A (en) * | 2005-06-21 | 2007-01-11 | Chugoku Electric Power Co Inc:The | Method and system for determination of water penetration into optical fiber cable |
| JP2007003232A (en) * | 2005-06-21 | 2007-01-11 | Chugoku Electric Power Co Inc:The | Water penetration determination method for optical fiber cable and maintenance method for optical fiber cable |
| JP4657024B2 (en) * | 2005-06-21 | 2011-03-23 | 中国電力株式会社 | Optical fiber inundation judgment method |
| JP4660293B2 (en) * | 2005-06-21 | 2011-03-30 | 中国電力株式会社 | Optical fiber intrusion judgment method, optical fiber maintenance method |
| CN109891207A (en) * | 2016-11-07 | 2019-06-14 | Abb瑞士股份有限公司 | Industrial robot for food industry, including leak detecting device |
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