JPS6250640A - Water intrusion detection sensor - Google Patents
Water intrusion detection sensorInfo
- Publication number
- JPS6250640A JPS6250640A JP18994485A JP18994485A JPS6250640A JP S6250640 A JPS6250640 A JP S6250640A JP 18994485 A JP18994485 A JP 18994485A JP 18994485 A JP18994485 A JP 18994485A JP S6250640 A JPS6250640 A JP S6250640A
- Authority
- JP
- Japan
- Prior art keywords
- transmission line
- optical transmission
- water
- spacer
- shrinks
- 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.)
- Granted
Links
Landscapes
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は光伝送線を用いた浸水検知センサに関するもの
である。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a water immersion detection sensor using an optical transmission line.
（従来の技術）
従来の代表的な浸水検知センサとしては、銅の被覆の一
部に穴を設は銅を露出させた穴あき被覆銅線２本で構成
する浸水検知センサがある。これは浸水時に起こる２本
の銅線間の絶縁抵抗の低下を電気的に測定して浸水を検
知するセンサである。(Prior Art) As a typical conventional water immersion detection sensor, there is a water immersion detection sensor constructed of two perforated coated copper wires in which a hole is formed in a part of the copper coating to expose the copper. This is a sensor that detects water ingress by electrically measuring the drop in insulation resistance between two copper wires that occurs when the wire is submerged in water.
しかしこのセンサは銅線という導電体を用いているので
、大電流や高電圧の発生する場所では電磁誘導を受け、
誘導電流や電圧の変動によって浸水点の正確な測定が困
難となる場合があった。また湿度が高い場合にも、銅線
間の絶縁抵抗が低下し、あたかも浸水があったかのよう
に検知して誤動作してしまう欠点があった。さらにこの
湿度による誤動作を防ぐために高感度にもできない欠点
もあった。However, since this sensor uses a conductor called copper wire, it is subject to electromagnetic induction in places where large currents or high voltages are generated.
Accurate measurement of the flood point was sometimes difficult due to fluctuations in induced current and voltage. Furthermore, when the humidity is high, the insulation resistance between the copper wires decreases, resulting in detection as if there had been water intrusion, resulting in malfunction. Another drawback was that it was not possible to increase sensitivity to prevent malfunctions caused by humidity.
（発明が解決しようとする問題点）
光伝送線と水に接触すると収縮する繊維（以下、収縮糸
という）とを組み合わせて、電磁誘導による影響を受け
ない高感度な浸水検知センサを提供することにある。(Problems to be Solved by the Invention) To provide a highly sensitive water immersion detection sensor that is not affected by electromagnetic induction by combining an optical transmission line and fibers that contract when they come into contact with water (hereinafter referred to as shrinkable threads). It is in.
（問題点を解決するための手段）
本発明は収縮糸により光伝送線に局部的な曲がりを与え
、それによる伝送損失の増加を測定することよって浸水
を検知する。(Means for Solving the Problems) The present invention detects water intrusion by applying a local bend to an optical transmission line using a shrinkable thread and measuring the resulting increase in transmission loss.
すなわち本発明の構成は収縮糸を両面が平板状のスペー
サの上に固定し、前記スペーサには光伝送線を巻き付け
、収縮糸の収縮により光伝送線に伝送損失が増加するよ
うな局部的な曲がりを生じさせるようにする。そして収
縮糸および光伝送線を含めてスペーサを、２枚の押え板
で両面から挟んで押え付け、前記局部的な曲がりととも
に生じる光伝送線のねじれを防止するようにする。In other words, the structure of the present invention is to fix a shrinkable thread on a spacer having flat plate-like surfaces on both sides, and to wrap an optical transmission line around the spacer so that the shrinkable thread does not cause local transmission loss in the optical transmission line due to contraction of the shrinkable thread. Make it curve. Then, the spacer including the shrinkable thread and the optical transmission line is sandwiched and pressed from both sides by two pressing plates to prevent twisting of the optical transmission line that occurs due to the local bending.
第１図は本発明の一実施例の平面図であって、浸水前の
状態を示す。第１図において、１は収縮糸、２は光伝送
線、３は光伝送線を保持し光伝送線に局部的な曲がりを
与えるためのスペーサ、４は浸水時に収縮糸の収縮作用
によって生じる光伝送線のねじれを防止するための押え
板である。FIG. 1 is a plan view of an embodiment of the present invention, showing the state before being submerged in water. In Figure 1, 1 is a shrinkable thread, 2 is an optical transmission line, 3 is a spacer for holding the optical transmission line and giving local bends to the optical transmission line, and 4 is light generated by the shrinkage action of the shrinkable thread when submerged in water. This is a holding plate to prevent twisting of the transmission line.
第２図はスペーサ３と押え板４を組み合わせたときの概
観図である。この浸水検知センサが浸水すると、第３図
に示すように収縮系が収縮し、光伝送線がスペーサ３に
沿うように局部的に曲げられ伝送損失が増加する。FIG. 2 is an overview diagram when the spacer 3 and the presser plate 4 are combined. When this water immersion detection sensor is immersed in water, the contraction system contracts as shown in FIG. 3, the optical transmission line is locally bent along the spacer 3, and transmission loss increases.
したがって光パルス試験器によるバックスキャツタ法（
光パルス試験器により光伝送線の片端から光パルスを送
出し、光伝送線の途中からレーリー散乱によって戻って
くる反射パルスを利用して光伝送線の伝送損失、光伝送
線の長さ方向の損失変化、損失変化点までの距離を測定
する方法）を用いることにより浸水箇所を測定できる。Therefore, the backscatter method using an optical pulse tester (
An optical pulse tester sends out an optical pulse from one end of an optical transmission line, and uses the reflected pulse that returns from the middle of the optical transmission line due to Rayleigh scattering to measure the transmission loss of the optical transmission line and the lengthwise direction of the optical transmission line. The location of flooding can be measured by using a method of measuring loss change and distance to the point of loss change.
ここではスペーサ３に光伝送線を１回巻き付け、光伝送
線の２点を１本の収縮糸で結び合わせた構造のものを示
したが、光伝送線、収縮糸は複数本・でもよい。またス
ペーサの形状は局部的に曲がりが与えられる構造であれ
ばよく、特に第１図の形状には限定しない。Here, a structure is shown in which the optical transmission line is wound once around the spacer 3 and two points of the optical transmission line are tied together with one shrinkable thread, but a plurality of optical transmission lines and shrinkable threads may be used. Further, the shape of the spacer may be any structure as long as it can be locally bent, and is not particularly limited to the shape shown in FIG.
収縮系の具体例としては（株）花王石けんの収縮糸Ｗ
Ｅ Ｙ＠ （Ｗｏｎｄｅｒ Ｅｌａｓｔｉｃ Ｙａｒｎ
）が挙げられるが、収縮糸の形状は糸状に限らず、シー
トまたは帯状でもよい。次に第１図に示した浸水検知セ
ンサが実際に浸水したときの伝送損失増を測定した結果
について説明する。A specific example of a shrinkable system is Kao Soap Co., Ltd.'s shrinkable thread W.
E Y @ (Wonder Elastic Yarn
), but the shape of the shrinkable thread is not limited to thread-like, but may be sheet- or band-like. Next, the results of measuring the increase in transmission loss when the water immersion detection sensor shown in FIG. 1 is actually submerged in water will be explained.
すなわちコア径／ガラス外径＝５０μｍ／１２５ μｍ
１比屈折率１％の石英系クレーデッド形光ファイバに外
径０．３ｍｍのシリコーン被覆を施した光伝送線１本を
、外周約２１０ｍｍの楕円形のスペーサに１回巻き付け
、楕円形の長軸側の相対する２点を約２２０ｇ ／本の
ｌ’ｉＥＹ収縮糸１本で結び、波長１．３μｍのしεＤ
光での損失増を測定した。浸水時間と伝送損失増の関係
を第４図に示す。In other words, core diameter/glass outer diameter = 50 μm/125 μm
One optical transmission line made of a silicone-coated silica-based cladded optical fiber with a relative refractive index of 1% and an outer diameter of 0.3 mm is wound once around an elliptical spacer with an outer circumference of about 210 mm, and the length of the ellipse is Connect two opposing points on the shaft side with one l'iEY shrink thread of approximately 220 g/piece, and then
The increase in optical loss was measured. Figure 4 shows the relationship between flood time and transmission loss increase.
第４図に見られるように、浸水してから約２分後には約
１２ｄＢの損失増が認められ、その後少し損失が減少す
るが、４分後以降には約１１．６ｄＢで安定し、十分バ
ックスキャツタ法による浸水検知および浸水点までの距
離の測定が可能であることを確認した。As shown in Figure 4, an increase in loss of about 12 dB is observed about 2 minutes after being submerged in water, and then the loss decreases slightly, but after 4 minutes it stabilizes at about 11.6 dB, which is sufficient. We confirmed that it is possible to detect flooding and measure the distance to the flooding point using the backscatter method.
この実施例で示した浸水検知センサは光伝送線のコア径
／ファイバ外径の値を大きくする、比屈折率差を小さく
する等のファイバパラメータを選択することによって、
高感度にすることが可能である。The water immersion detection sensor shown in this example can be constructed by selecting fiber parameters such as increasing the core diameter/fiber outer diameter of the optical transmission line and decreasing the relative refractive index difference.
It is possible to achieve high sensitivity.
また剛性の小さい光伝送線を用いたり、収縮糸の収縮力
を増大させることによっても高感度にできる。このよう
に本発明の浸水検知センサは、光伝送線と収縮糸により
構成されており、従来の導電体を使ったものに比べて電
磁誘導による影響がなく、湿気による誤動作もないので
、誘導に強い高感度なセンサが実現できる利点がある。High sensitivity can also be achieved by using an optical transmission line with low rigidity or by increasing the contraction force of a contraction thread. In this way, the water immersion detection sensor of the present invention is composed of an optical transmission line and a shrinkable thread, and compared to those using conventional conductors, it is not affected by electromagnetic induction and does not malfunction due to moisture. This has the advantage that a strong and highly sensitive sensor can be realized.
また簡便なパルス試験器だけで浸水検知と浸水点の推定
を簡易に、しかも経済的に行うことができる利点がある
。Another advantage is that water intrusion detection and estimation of the inundation point can be performed easily and economically using only a simple pulse tester.
なお光ファイバの材質は石英系に限らずプラスチック系
でもい。The material of the optical fiber is not limited to quartz, but may also be plastic.
（発明の効果）
以上説明したように、本発明の浸水検知センサは、光伝
送線と収縮糸により構成されているので、電磁誘導によ
る影響がないうえに、湿気による誤動作もなく、高感度
で、信頼性が高い。(Effects of the Invention) As explained above, since the water immersion detection sensor of the present invention is composed of an optical transmission line and a shrinkable thread, it is not affected by electromagnetic induction, does not malfunction due to moisture, and has high sensitivity. , highly reliable.
また光フアイバパラメータや光伝送線の剛性等を適当に
選択することにより、高感度なセンサが容易に実現でき
る利点もあわせて有している。さらに簡便なパルス試験
器だけで浸水検知と浸水点の推定が簡易に、しかも経済
的に行うことができる利点がある。It also has the advantage that a highly sensitive sensor can be easily realized by appropriately selecting the optical fiber parameters and the rigidity of the optical transmission line. Furthermore, there is an advantage that water intrusion detection and estimation of the inundation point can be performed easily and economically using only a simple pulse tester.
第１図は本発明の一実施例の平面図、第２図は第１図に
示したスペーサと押え板を組み合わせたときの概観図、
第３図は第１図に示した浸水検知センサの浸水後の状態
を示す平面図、第４図は第１図に示した浸水検知センサ
が浸水したときの浸水時間と伝送損失増との関係を示す
図である。
１・・・収縮糸 ２・・・光伝送線３・・・
スペーサ ４・・・押え板第１図
第２図
ｐＰＬ練FIG. 1 is a plan view of an embodiment of the present invention, FIG. 2 is an overview diagram when the spacer and presser plate shown in FIG. 1 are combined,
Figure 3 is a plan view showing the state of the flood detection sensor shown in Figure 1 after being flooded, and Figure 4 is the relationship between the immersion time and increase in transmission loss when the flood detection sensor shown in Figure 1 is submerged in water. FIG. 1... Shrinkable thread 2... Optical transmission line 3...
Spacer 4... Presser plate Figure 1 Figure 2 pPL training
Claims (1)
おいて、両面が平板状のスペーサの上に固定された、水
に接触すると収縮する繊維と、光伝送線が巻き付けられ
ており、前記繊維の収縮により光伝送線に伝送損失が増
加するような局部的な曲がりを生じさせるスペーサと、
前記繊維および光伝送線を含めて前記スペーサを両面か
ら挟んで押え付け、前記局部的な曲がりとともに生じる
光伝送線のねじれを防止する２枚の押え板とで構成した
ことを特徴とする浸水検知センサ。1. In a water immersion detection sensor that detects water immersion using an optical transmission line, an optical transmission line is wound around a fiber that shrinks when it comes into contact with water, which is fixed on a spacer with flat plate-like surfaces on both sides. a spacer that causes a local bend in the optical transmission line to increase transmission loss due to contraction of the spacer;
Water immersion detection characterized by comprising two holding plates that sandwich and press the spacer including the fiber and the optical transmission line from both sides to prevent twisting of the optical transmission line that occurs due to the local bending. sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18994485A JPH0663900B2 (en) | 1985-08-30 | 1985-08-30 | Infiltration detection sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18994485A JPH0663900B2 (en) | 1985-08-30 | 1985-08-30 | Infiltration detection sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6250640A true JPS6250640A (en) | 1987-03-05 |
| JPH0663900B2 JPH0663900B2 (en) | 1994-08-22 |
Family
ID=16249817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18994485A Expired - Lifetime JPH0663900B2 (en) | 1985-08-30 | 1985-08-30 | Infiltration detection sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0663900B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100711815B1 (en) | 2005-10-19 | 2007-04-30 | 두산디앤디 주식회사 | Metal-wire feeding system for large capability |
| JP2020513542A (en) * | 2016-11-11 | 2020-05-14 | アムシルク・ゲーエムベーハー | Use of shrinkable biopolymer fibers as a sensor |
-
1985
- 1985-08-30 JP JP18994485A patent/JPH0663900B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100711815B1 (en) | 2005-10-19 | 2007-04-30 | 두산디앤디 주식회사 | Metal-wire feeding system for large capability |
| JP2020513542A (en) * | 2016-11-11 | 2020-05-14 | アムシルク・ゲーエムベーハー | Use of shrinkable biopolymer fibers as a sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0663900B2 (en) | 1994-08-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |