JP2003114161A - Detecting wire for position of liquid leakage and liquid leakage detection system using the same - Google Patents
Detecting wire for position of liquid leakage and liquid leakage detection system using the sameInfo
- Publication number
- JP2003114161A JP2003114161A JP2001308555A JP2001308555A JP2003114161A JP 2003114161 A JP2003114161 A JP 2003114161A JP 2001308555 A JP2001308555 A JP 2001308555A JP 2001308555 A JP2001308555 A JP 2001308555A JP 2003114161 A JP2003114161 A JP 2003114161A
- Authority
- JP
- Japan
- Prior art keywords
- wire
- liquid leakage
- resistance
- position detection
- liquid
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/30—Landfill technologies aiming to mitigate methane emissions
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、堆積物等からの液
体の流出を遮断する遮水シートの損傷等による漏液を検
知するのに用いられ、その漏液位置を検知するのに適し
た漏液位置検知線及びそれを用いた漏液検知システムに
関し、特に検知対象液に対する耐液性に優れ、機械的強
度と取り扱い性にすぐれた漏液位置検知線及びそれを用
いた漏液検知システムに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for detecting liquid leakage due to damage to a water-blocking sheet that blocks outflow of liquid from deposits, and is suitable for detecting the liquid leakage position. Liquid leakage position detection line and liquid leakage detection system using the same, particularly liquid leakage position detection line excellent in liquid resistance to liquid to be detected, excellent in mechanical strength and handleability, and liquid leakage detection system using the same It is about.
【０００２】[0002]
【従来の技術】近年環境問題の一つとして、廃棄物処分
場からの環境汚染物質の浸出対策が大きな問題となって
いる。その廃棄物処分の一方法として、図６に示すよう
に、地盤６０の凹部に遮水シート６１，６２などを敷
き、その上に廃棄物６７を投棄して堆積させ、最終的に
そのまま土中に埋設するという方法が採られている。こ
の遮水シート６１，６２は、廃棄物６７中に混じってい
た有害物質や、堆積中に化学反応により生じた有害物質
が地盤６０中に浸み込んで、地下水を汚染するの防ぐた
めのものである。したがって、各種の条件を想定し、機
械的にも、化学的にも十分な特性を備えたものとされて
いるが、それでも経年変化や何らかの条件により損傷す
ると、そこから有害物質を含んだ漏液が地盤中に浸出し
てしまう恐れがある。そこで、遮水シートの損傷による
漏液の発生を検知し、かつその損傷位置（漏液位置）を
早期に検知して対策を講じ得るようにすることが必要で
ある。2. Description of the Related Art In recent years, as one of the environmental problems, measures against the leaching of environmental pollutants from waste disposal sites have become a major problem. As a method of disposing of the waste, as shown in FIG. 6, water-impervious sheets 61, 62, etc. are laid in the recesses of the ground 60, and the waste 67 is dumped and deposited on the water-impervious sheets 67, and finally as it is in the soil. The method of burying is adopted. The impermeable sheets 61, 62 are for preventing the harmful substances mixed in the waste 67 and the harmful substances generated by the chemical reaction during the deposition from infiltrating into the ground 60 and contaminating the groundwater. Is. Therefore, assuming various conditions, it is considered to have sufficient mechanical and chemical properties, but even if it is damaged due to aging or some condition, it will leak liquid containing harmful substances. May leach into the ground. Therefore, it is necessary to detect the occurrence of liquid leakage due to damage to the waterproof sheet and to detect the damaged position (liquid leakage position) at an early stage so that countermeasures can be taken.
【０００３】このような、遮水シートからの漏液を検知
する漏液検知システムは、特開平１０−３００６２２号
公報に提案され、実用化されている。図７は、その漏液
検知システムにおける漏液位置検知の原理図である。漏
液検知システム３０は、遮水シート６１の下側に配設さ
れる抵抗線３１ａ及び導電線３２、遮水シート６１の上
側に配設される電流ソース線３３と、電流ソース線３３
の一端に接続される図示しない直流電源と電流制御器３
６からなる定電流電源と、抵抗線３１ａの両端の電圧を
測定する電圧計Ｖと、定電流電源から電流ソース線３３
及び抵抗線３１ａへと流れる電流を監視する電流計Ａと
を備えている。遮水シート６１が損傷して破口Ｐが生
じ、廃棄物から出た液体Ｅがその破口Ｐから漏洩する
と、漏液Ｅによって電流ソース線３３と抵抗線３１ａと
は導通状態となり、電流計Ａに電流Ｉｃが流れる。そこ
で、抵抗線３１ａの両端に現れる電圧Ｖｘは、破口（漏
液点）Ｐから接地点Ｇまでの電位差であり、抵抗線３１
ａの単位長あたりの抵抗値をＲ0 、抵抗線３１ａの漏液
点Ｐから接地側端Ｉまでの長さＸは、リード線３９にお
ける電位差を無視できるものとすると、
Ｘ＝Ｖｘ／（Ｒ0 ×Ｉｃ） （１）
により求められ、破口Ｐの位置が分かる。Such a liquid leakage detection system for detecting liquid leakage from a water-blocking sheet has been proposed and put into practical use in Japanese Laid-Open Patent Publication No. 10-300622. FIG. 7 is a principle diagram of liquid leakage position detection in the liquid leakage detection system. The liquid leakage detection system 30 includes a resistance wire 31 a and a conductive wire 32 disposed below the water shield sheet 61, a current source line 33 disposed above the water shield sheet 61, and a current source line 33.
DC power supply and current controller 3 (not shown) connected to one end of
6, a constant current power supply, a voltmeter V that measures the voltage across the resistance wire 31a, and a current source line 33 from the constant current power supply.
And an ammeter A for monitoring the current flowing to the resistance wire 31a. When the water shield sheet 61 is damaged and a break P is generated and the liquid E discharged from the waste leaks from the break P, the leak E causes the current source line 33 and the resistance line 31a to be in a conductive state and the ammeter. A current Ic flows through A. Therefore, the voltage Vx appearing at both ends of the resistance wire 31 a is the potential difference from the break (leak point) P to the ground point G, and the resistance wire 31
If the resistance value per unit length of a is R 0 , and the length X from the leak point P of the resistance wire 31 a to the ground side end I is such that the potential difference on the lead wire 39 can be ignored, then X = Vx / (R 0 × Ic) Obtained by (1), the position of the break P is known.
【０００４】ところで、この漏液検知システム３０にお
いて、抵抗線３１ａや導電線３２、電流ソース線３３の
具体例としては、次のようなものが用いられてきた。図
８は、抵抗線３１ａ上にポリエステル繊維の糸からなる
内部編組体３１ｂを被覆した編組抵抗線３１と導電線３
２ａの上にポリ塩化ビニル被覆３２ｂを被覆した被覆リ
ード線３２とを撚り合わせ、その上にポリエステル繊維
の糸からなる外部編組体３３を被覆した漏液位置検知線
３０とし、電流ソース線３３としては、裸銅線が用いら
れていた。By the way, in the liquid leakage detection system 30, the followings have been used as specific examples of the resistance wire 31a, the conductive wire 32, and the current source wire 33. FIG. 8 shows a braided resistance wire 31 and a conductive wire 3 in which an inner braided body 31b made of a polyester fiber thread is coated on the resistance wire 31a.
2a and a coated lead wire 32 coated with a polyvinyl chloride coating 32b are twisted together, and an outer braid 33 made of a polyester fiber thread is coated thereon to form a liquid leakage position detection wire 30 and a current source wire 33. Used a bare copper wire.
【０００５】このように、カンタル線などの抵抗線３１
ａと軟銅より線からなる導電線３２とが漏液位置検知線
３０として一体化されているので、それぞれ単独に配設
するよりは、取り扱いは容易であるが、抵抗線３１ａが
漏液にさらされると腐食して断線するおそれがあり、ま
た抵抗線３１ａと導電線３２ａとの剛性の差に起因し
て、敷設の際、キンクを生じやすいという問題があっ
た。As described above, the resistance wire 31 such as the Kanthal wire is used.
Since a and the conductive wire 32 made of annealed copper wire are integrated as the liquid leakage position detection wire 30, it is easier to handle than disposing them separately, but the resistance wire 31a is exposed to the liquid leakage. If it is exposed, it may corrode and break, and there is a problem that a kink is likely to occur during installation due to the difference in rigidity between the resistance wire 31a and the conductive wire 32a.
【０００６】[0006]
【発明が解決しようとする課題】本発明は、上記の問題
点を解消しようとするものであって、請求項１乃至５に
記載の発明は、抵抗線が腐食されることがなく、キンク
を生じる恐れがなく、また機械的強度のある漏液位置検
知線の提供を課題とし、請求項６及び７に記載の漏液検
知システムは、上記漏液位置検知線を用い確実に漏液位
置を検知できる漏液検知システムの提供を課題とする。DISCLOSURE OF THE INVENTION The present invention is intended to solve the above-mentioned problems, and the invention according to claims 1 to 5 is such that the resistance wire is not corroded and the kink is eliminated. It is an object of the present invention to provide a liquid leakage position detection line that is not likely to occur and has mechanical strength, and the liquid leakage detection system according to claim 6 or 7 reliably detects the liquid leakage position by using the liquid leakage position detection line. The problem is to provide a leak detection system that can detect the leak.
【０００７】[0007]
【課題を解決するための手段】上記課題を解決するた
め、本発明の請求項１の発明は、ほぼ平行に配設された
被覆抵抗線と被覆リード線とを連接して一体化してな
り、前記被覆抵抗線は、導体抵抗が長さ方向に均一な抵
抗線の上に耐液性で半導電性の高分子部材を被覆してな
り、前記被覆リード線は、導電線の上に耐液性の絶縁部
材を被覆してなることを特徴とするものである。In order to solve the above-mentioned problems, the invention of claim 1 of the present invention is such that a covered resistance wire and a covered lead wire arranged substantially in parallel are connected and integrated. The coated resistance wire comprises a resistance wire whose conductor resistance is uniform in the longitudinal direction and a liquid-resistant semiconductive polymer member coated on the resistance wire, and the coated lead wire is a liquid-resistant coating on the conductive wire. It is characterized by being coated with a conductive insulating member.
【０００８】ここに、耐液性とは検知対象液（破口から
漏洩する液体、すなわち漏液）によって特性の劣化が生
じにくく、使用期間中は被覆抵抗線又は被覆リード線と
しての機能を保持する性質をいう。抵抗線には、耐液性
で半導電性の高分子部材が被覆され、被覆リード線は、
導電線の上に耐液性の絶縁部材を被覆してあるので、抵
抗線や導電線が腐食されることがなく、また被覆抵抗線
の被覆は半導電性であるから、抵抗線を電極として他の
電極線（例えば、電流ソース線）との間に電圧を加えれ
ば、電極線間への液体の浸入などによる電気特性の変化
を検知することができる。そして、被覆抵抗線と被覆リ
ード線は連接して一体化されているので、曲げ方向が短
径方向に限定されるが、抵抗線と導電線との間に剛性の
ちがいがあってもキンクを生じることがなく、また抵抗
線が被覆されているため機械的強度がある。[0008] Here, the liquid resistance means that deterioration of characteristics is unlikely to occur due to the liquid to be detected (liquid leaking from the break, that is, liquid leakage), and the function as a coated resistance wire or a coated lead wire is maintained during use. Refers to the nature of The resistance wire is coated with a liquid-resistant, semi-conductive polymer member, and the coated lead wire is
Since the resistance wire or conductive wire is not corroded because the conductive wire is covered with a liquid-resistant insulating member, and the covering resistance wire is semi-conductive, the resistance wire is used as an electrode. If a voltage is applied to another electrode line (for example, a current source line), it is possible to detect a change in electrical characteristics due to infiltration of liquid between the electrode lines. And since the covered resistance wire and the covered lead wire are connected and integrated, the bending direction is limited to the minor axis direction, but even if there is a difference in rigidity between the resistance wire and the conductive wire, there is a kink. It does not occur and has mechanical strength because the resistance wire is covered.
【０００９】請求項２記載の発明は、請求項１記載の漏
液位置検知線において、前記被覆抵抗線の被覆は、導電
性粉を含有する高分子部材からなることを特徴とする。
これにより、適度の導電性を有する半導電性の高分子部
材で被覆された被覆抵抗線が安価に得られる。According to a second aspect of the present invention, in the liquid leakage position detection line according to the first aspect, the coating of the coating resistance wire is made of a polymer member containing conductive powder.
Thereby, the coated resistance wire coated with the semiconductive polymer member having appropriate conductivity can be obtained at low cost.
【００１０】請求項３記載の発明は、請求項１又は２記
載の漏液位置検知線において、前記被覆抵抗線の被覆及
び前記被覆リード線の絶縁部材は、基材がともに押出成
形可能な高分子部材からなることを特徴とする。前記被
覆抵抗線の被覆及び被覆リード線の絶縁部材は、基材が
ともに押出成形可能な高分子部材からなることを特徴と
する。これにより、一括押し出しが可能となり、被覆抵
抗線及び被覆リード線の形成と連接・一体化が同時に行
われる。According to a third aspect of the present invention, in the liquid leakage position detection line according to the first or second aspect, the base material of the coating of the coated resistance wire and the insulating member of the coated lead wire can be extruded together. It is characterized by comprising a molecular member. The coating of the coated resistance wire and the insulating member of the coated lead wire are characterized in that both base materials are made of extrudable polymer members. As a result, it is possible to carry out batch extrusion, and the formation and connection / integration of the coated resistance wire and the coated lead wire are performed at the same time.
【００１１】請求項４記載の発明は、請求項１乃至３の
いずれかに記載の漏液位置検知線において、前記被覆リ
ード線の導電線の導体抵抗は、前記抵抗線の導体抵抗に
比して無視し得るほどに小さいことを特徴とする。これ
により、抵抗線の端部から漏液位置までの導体抵抗を測
定することにより、漏液位置の検知ができ、しかも被覆
リード線中の導電線をリード線として用いることができ
る。According to a fourth aspect of the present invention, in the liquid leakage position detection line according to any of the first to third aspects, the conductor resistance of the conductive wire of the coated lead wire is higher than that of the resistance wire. It is small enough to be ignored. Thus, the leak position can be detected by measuring the conductor resistance from the end of the resistance wire to the leak position, and the conductive wire in the coated lead wire can be used as the lead wire.
【００１２】請求項５記載の発明は、請求項１乃至４の
いずれかに記載の漏液位置検知線において、前記被覆抵
抗線及び前記被覆リード線に外接して包被する保護編組
体を有することを特徴とする。連接・一体化された被覆
抵抗線と被覆リード線は、この保護編組体により、いっ
そう確実に一体化され、ばらけたりするおそれがない。According to a fifth aspect of the present invention, in the liquid leakage position detection wire according to any one of the first to fourth aspects, there is provided a protective braid body which circumscribes and covers the coated resistance wire and the coated lead wire. It is characterized by The connected and integrated covered resistance wire and the covered lead wire are more surely integrated by the protective braid, and there is no risk of separation.
【００１３】請求項６記載の発明は、堆積物等からの液
体の流出を遮断する遮水シートの損傷による漏液を検知
する漏液検知システムにおいて、前記遮水シートの片側
に敷設された請求項１乃至５のいずれかに記載の漏液位
置検知線と、前記遮水シートを挟んで前記漏液位置検知
線と反対側に敷設され、前記漏液位置検知線中の抵抗線
との間の電気特性の変化を検知するための電流ソース線
と、前記抵抗線と前記電流ソース線との間に定電流を供
給する定電流電源と、前記抵抗線の両端の電圧を測定す
る電圧測定手段とを備えたことを特徴とする。According to a sixth aspect of the present invention, in a liquid leakage detection system for detecting liquid leakage due to damage to the water impermeable sheet that blocks outflow of liquid from deposits or the like, the system is laid on one side of the water impermeable sheet. Between the liquid leakage position detection line according to any one of Items 1 to 5 and the resistance wire in the liquid leakage position detection line, which is laid on the opposite side of the liquid leakage position detection line with the water-impervious sheet interposed therebetween. Current source line for detecting a change in electrical characteristics of the device, a constant current power supply for supplying a constant current between the resistance line and the current source line, and voltage measuring means for measuring the voltage across the resistance line. It is characterized by having and.
【００１４】遮水シートの損傷により、漏液が生じる
と、漏液位置検知線の抵抗線と、遮水シートを挟んで反
対側に敷設された電流ソース線との間に定電流電源から
の電流が流れ、電圧測定手段によって被覆抵抗線の両端
の電圧を測定することにより、被覆抵抗線の端部から漏
液点までの距離が分かり、漏液位置が検知できる。また
抵抗線には、耐液性で半導電性の高分子部材が被覆さ
れ、被覆リード線は、導電線の上に耐液性の絶縁部材を
被覆してあるので、抵抗線や導電線が腐食されることが
なく、また被覆抵抗線の被覆は半導電性であるから、抵
抗線と電流ソース線との間に電圧を加えれば、その間へ
の液体の浸入などによる電気特性の変化を検知すること
ができる。そして、被覆抵抗線と被覆リード線は連接し
て一体化されているので、曲げ方向が短径方向に限定さ
れるが、抵抗線と導電線との間に剛性のちがいがあって
もキンクを生じることがない。When liquid leakage occurs due to damage to the water shield sheet, a constant current power supply is provided between the resistance wire of the liquid leakage position detection line and the current source line laid on the opposite side of the water shield sheet. A current flows, and by measuring the voltage across the coated resistance wire by the voltage measuring means, the distance from the end of the coated resistance wire to the leak point can be known, and the leak position can be detected. Further, the resistance wire is covered with a liquid-resistant and semi-conductive polymer member, and the coated lead wire is covered with a liquid-resistant insulating member on the conductive wire. Since it is not corroded and the coating of the coated resistance wire is semi-conductive, if a voltage is applied between the resistance wire and the current source wire, changes in electrical characteristics due to liquid infiltration into the space can be detected. can do. And since the covered resistance wire and the covered lead wire are connected and integrated, the bending direction is limited to the minor axis direction, but even if there is a difference in rigidity between the resistance wire and the conductive wire, there is a kink. It never happens.
【００１５】請求項７記載の発明は、請求項６記載の漏
液検知システムにおいて、前記遮水シートは、上下２枚
の遮水シートからなり、前記上下２枚の遮水シートの間
に敷設された請求項１乃至５のいずれかに記載の漏液位
置検知線と、前記上側遮水シートの上面に敷設される上
側電流ソース線と、前記下側遮水シートの下面に敷設さ
れる下側電流ソース線と、前記漏液位置検知線中の被覆
抵抗線と前記上側及び下側電流ソース線との間にそれぞ
れ定電流を供給する定電流電源と、前記被覆抵抗線の両
端の電圧を測定する電圧測定手段とを備えたことを特徴
とする。According to a seventh aspect of the present invention, in the liquid leakage detection system according to the sixth aspect, the water blocking sheet is composed of two upper and lower water blocking sheets, and is laid between the two upper and lower water blocking sheets. The leak position detecting line according to any one of claims 1 to 5, an upper current source line laid on the upper surface of the upper water blocking sheet, and a lower line laid on the lower surface of the lower water blocking sheet. A side current source line, a constant current power supply for supplying a constant current between the covered resistance wire in the liquid leakage position detection wire and the upper and lower current source lines, and a voltage across the covered resistance wire. And a voltage measuring means for measuring.
【００１６】遮水シートが２枚ある場合、遮水がより確
実に行われるとともに、上記のように、上下２枚の遮水
シートの間に漏液位置検知線を、上側遮水シートの上面
に上側電流ソース線を、下側遮水シートの下面に下側電
流ソース線を、それぞれ敷設し、漏液位置検知線中の抵
抗線と上側及び下側電流ソース線との間にそれぞれ定電
流電源から定電流を供給するようにすれば、電圧測定手
段により抵抗線の両端の電圧を測定することにより上下
２枚の遮水シートのいずれに損傷が生じてもそこからの
漏液を検知し、その位置を検知することができる。When there are two water-impervious sheets, the water-impermeability is ensured, and as described above, the liquid leakage position detection line is provided between the upper and lower two water-impervious sheets and the upper surface of the upper water-impervious sheet. Lay an upper current source line on the lower side of the lower water-blocking sheet, and a lower current source line on the lower surface of the lower water-blocking sheet.Constant current is placed between the resistance line in the leak position detection line and the upper and lower current source lines. If a constant current is supplied from the power source, the voltage measuring means measures the voltage at both ends of the resistance wire to detect liquid leakage from any of the upper and lower impermeable sheets. , Its position can be detected.
【００１７】[0017]
【発明の実施の形態】本発明の実施の形態を、図面にも
とづいて説明する。図１は、本発明の漏液位置検知線の
第１の実施形態の斜視図、図２は、本発明の漏液位置検
知線の第２の実施形態の斜視図、図３は、本発明の漏液
検知システムの第１の実施形態の説明図、図４は、本発
明の漏液検知システムの第２の実施形態の説明図、図５
は、本発明の実施例による位置検知の実験の説明図であ
る。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. 1 is a perspective view of a first embodiment of a liquid leakage position detection line of the present invention, FIG. 2 is a perspective view of a second embodiment of a liquid leakage position detection line of the present invention, and FIG. 5 is an explanatory view of a first embodiment of the liquid leakage detection system of FIG. 4, FIG. 4 is an explanatory view of a second embodiment of the liquid leakage detection system of the present invention, FIG.
FIG. 6 is an explanatory diagram of an experiment of position detection according to an embodiment of the present invention.
【００１８】図１において、第１の実施形態である漏液
位置検知線１は、ほぼ平行に配設された被覆抵抗線２と
被覆リード線３とを連接４して一体化したものである。
被覆抵抗線２は、導体抵抗が長さ方向に均一な抵抗線２
ａの上に耐液性で半導電性の高分子部材２ｂを被覆した
ものであり、被覆リード線３は、導電線３ａの上に耐液
性の絶縁部材３ｂを被覆したものである。In FIG. 1, the liquid leakage position detection line 1 according to the first embodiment is formed by connecting a covered resistance wire 2 and a covered lead wire 3 which are arranged substantially parallel to each other by connecting them 4 together. .
The covered resistance wire 2 is a resistance wire 2 whose conductor resistance is uniform in the length direction.
A is coated with a liquid-resistant and semi-conductive polymer member 2b, and the coated lead wire 3 is formed by coating a conductive wire 3a with a liquid-resistant insulating member 3b.
【００１９】先に述べたように、ここで耐液性とは検知
対象液（破口から漏洩する液体、すなわち漏液）によっ
て特性の劣化が生じにくく使用期間中は被覆抵抗線又は
被覆リード線としての機能を保持する性質をいうが、検
知対象液の種類によって異なり、検知対象液が、例え
ば、水、酸又はアルカリであれば、耐水性、耐酸性、耐
アルカリ性ということになる。As described above, the liquid resistance means here that the characteristic of the liquid is not easily deteriorated by the liquid to be detected (the liquid leaking from the break, that is, the liquid leakage), and the coated resistance wire or the coated lead wire is used during the period of use. However, if the detection target liquid is, for example, water, acid or alkali, it means water resistance, acid resistance and alkali resistance.
【００２０】抵抗線２ａには、例えばカンタル線（カン
タル・ガデリウス社製のニッケルクロム合金線）など単
位長さあたりの導体抵抗が導電線２ａの銅線や錫メッキ
軟銅線のそれを無視し得る程度に高いものが用いられ
る。これは後述するように漏液位置を検知する際の誤差
を小さくするためである。For the resistance wire 2a, the conductor resistance per unit length such as Kanthal wire (nickel-chromium alloy wire manufactured by Kanthal Gadelius) can be neglected from that of the copper wire of the conductive wire 2a or the tin-plated annealed copper wire. Higher ones are used. This is to reduce the error when detecting the liquid leakage position as described later.
【００２１】抵抗線２ａの上には、耐液性で半導電性の
高分子部材２ｂが被覆され、導電線３ａの上には耐液性
の絶縁部材３ｂが被覆されているので、抵抗線２ａや導
電線３ａは腐食されることがなく、また被覆抵抗線２の
被覆２ｂは半導電性であるから、抵抗線２ａを電極とし
て他の電極線との間に電圧を加えれば、電極線間の介在
物の電気特性の変化を検知することができる。また、被
覆リード線３の導電線３ａを電極線として用いればこの
漏液位置検知線は単独で漏液検知線として用いることも
できる。The resistance wire 2a is covered with a liquid-resistant and semi-conductive polymer member 2b, and the conductive wire 3a is covered with a liquid-resistant insulating member 3b. 2a and the conductive wire 3a are not corroded, and the coating 2b of the coated resistance wire 2 is semi-conductive. Therefore, if a voltage is applied between the resistance wire 2a and another electrode wire, the electrode wire It is possible to detect a change in the electrical characteristics of the intervening inclusions. Further, if the conductive wire 3a of the coated lead wire 3 is used as an electrode wire, this leak position detection line can be used alone as a leak detection line.
【００２２】被覆抵抗線２の被覆２ｂを導電性粉を含有
する高分子部材とすれば、導電性粉の含有量を調節する
ことによって、適度の導電性を有する半導電性の高分子
部材２ｂが容易に得られ、安価な被覆抵抗線２が得られ
る。If the coating 2b of the coated resistance wire 2 is a polymer member containing conductive powder, the semiconductive polymer member 2b having appropriate conductivity is adjusted by adjusting the content of the conductive powder. Can be easily obtained, and an inexpensive coated resistance wire 2 can be obtained.
【００２３】また、被覆抵抗線２と被覆リード線３との
連接４の方法としては、適当な接着剤によって接着する
ことも当然含まれるが、被覆抵抗線の被覆２ａ及び被覆
リード線の絶縁部材３ｂの基材をともに押出成形可能な
高分子部材とすると、被覆抵抗線２と被覆リード線３と
を一括押出成形することが可能となり、被覆抵抗線２と
被覆リード線３との連接・一体化が同時に行われるので
好ましい。Further, as a method of connecting 4 the coated resistance wire 2 and the coated lead wire 3 to each other, it is naturally included to bond them with an appropriate adhesive, but the coating 2a of the coated resistance wire and the insulating member of the coated lead wire are included. If both the base materials of 3b are extrudable polymer members, the coated resistance wire 2 and the coated lead wire 3 can be extruded together, and the coated resistance wire 2 and the coated lead wire 3 are connected and integrated. It is preferable that the conversion be carried out simultaneously.
【００２４】例えば、基材をポリ塩化ビニルなどの汎用
のプラスチックとすれば安価でしかも一括押出し成形が
容易であるから好ましい。また、被覆抵抗線の被覆２ａ
だけカーボンブラックなどの導電性粉を混入したものを
用いればよいので、容易に半導電性の被覆が得られると
いう点でも好ましい。For example, it is preferable to use a general-purpose plastic such as polyvinyl chloride as the base material, because it is inexpensive and batch extrusion molding is easy. Also, the coating 2a of the coated resistance wire
Only a mixture of conductive powder such as carbon black may be used, which is also preferable in that a semiconductive coating can be easily obtained.
【００２５】図２において、第２の実施形態である漏液
検知線１０は、漏液位置検知線１の上に、その被覆抵抗
線２及び被覆リード線３に外接するように保護編組体１
１を包被したものである。被覆抵抗線２と被覆リード線
３とは、接着や一括押出しなどで連接・一体化されてい
るが、この保護編組体１１を包被したことにより、いっ
そう確実に一体化され、ばらけたりするおそれがない。In FIG. 2, the liquid leakage detection line 10 of the second embodiment is provided on the liquid leakage position detection line 1 so as to circumscribe the coated resistance wire 2 and the coated lead wire 3.
It is an envelope of 1. The covered resistance wire 2 and the covered lead wire 3 are connected and integrated by adhesion, batch extrusion, or the like. However, by covering the protective braid 11, the covered resistance wire 2 and the covered lead wire 3 are more surely integrated and separated. There is no fear.
【００２６】漏液位置検知線として用いる場合は保護編
組体１１を構成する糸は、被覆抵抗線２と被覆リード線
３とを一体化し、保持する強度を有するものであればよ
いが、漏液検知線として用いる場合は、テトロンなどの
合成樹脂の糸が漏液に濡れたあとの回復性の点で好まし
い。また、その保護編組体の密度を調整することによ
り、検知感度を調整することができる。When the protective braid 11 is used as the liquid leakage position detection line, the yarn may be of any strength as long as it has the strength to hold the coated resistance wire 2 and the coated lead wire 3 in one body. When used as a detection line, it is preferable in terms of recoverability after a synthetic resin thread such as tetron gets wet with a leaked liquid. Further, the detection sensitivity can be adjusted by adjusting the density of the protective braid.
【００２７】次に、図３に基づいて、本発明の漏液検知
システムについて説明する。図３は、漏液検知システム
の第１の実施形態の構成の概要と動作の説明図であり、
遮水シートが１枚の場合に適用される。図３（ａ）にお
いて、漏液検知システム１５は、遮水シート６１の片側
に敷設された漏液位置検知線１と、遮水シート６１を挟
んで漏液位置検知線１と反対側に敷設され、漏液位置検
知線１中の抵抗線２ａとの間の電気特性の変化を検知す
るための電流ソース線２１と、抵抗線２ａと電流ソース
線２１との間に定電流を供給する定電流電源Ｄと、抵抗
線２ａの両端の電圧を測定する電圧測定手段Ｖとを備え
ている。Next, the liquid leakage detection system of the present invention will be described with reference to FIG. FIG. 3 is an explanatory diagram of the outline and operation of the configuration of the first embodiment of the liquid leakage detection system,
It is applied when there is only one waterproof sheet. In FIG. 3A, the liquid leakage detection system 15 includes a liquid leakage position detection line 1 laid on one side of a water shield sheet 61 and a liquid leakage position detection line 1 on the opposite side of the water shield sheet 61. The constant current is supplied between the current source line 21 and the current source line 21 for detecting a change in the electrical characteristics between the liquid leakage position detection line 1 and the resistance line 2a. A current source D and a voltage measuring means V for measuring the voltage across the resistance wire 2a are provided.
【００２８】この漏液検知システム１５では、漏液位置
検知線１が先に述べた特徴を有するので、ここでその特
徴が生かされる。そして、遮水シートの損傷により、漏
液Ｅが生じると、漏液位置検知線１の抵抗線 2ａと、遮
水シート６１を挟んで反対側に敷設された電流ソース線
２１との間に定電流電源Ｄからの定電流Ｉｃが流れ、電
圧測定手段Ｖによって抵抗線２ａの両端の電圧を測定す
ると、従来の技術で述べたのと同様、式（１）により抵
抗線の端部から漏液点までの距離が分かり、漏液位置が
検知できる。
Ｘ＝Ｖｘ／（Ｒ0 ×Ｉｃ） （１）
しかし、抵抗線２ａの抵抗値は、温度によって変化する
ので、この誤差を生じないシステムとして、近端遠端切
り換えスイッチＳが設けられている。In the liquid leakage detection system 15, the liquid leakage position detection line 1 has the above-mentioned characteristic, and therefore the characteristic is utilized here. Then, when liquid leakage E occurs due to damage to the water blocking sheet, it is fixed between the resistance wire 2a of the liquid leakage position detection line 1 and the current source line 21 laid on the opposite side with the water blocking sheet 61 interposed therebetween. When the constant current Ic from the current source D flows and the voltage across the resistance wire 2a is measured by the voltage measuring means V, liquid leakage from the end portion of the resistance wire is obtained by the equation (1) as described in the conventional technique. The distance to the point is known, and the leak position can be detected. X = Vx / (R 0 × Ic) (1) However, since the resistance value of the resistance wire 2a changes depending on the temperature, the near end / far end changeover switch S is provided as a system that does not cause this error.
【００２９】近端遠端切り換えスイッチＳは、主極４
１，４２と、近端側極４３，４４及び遠端側極４５，４
６で構成されている。図３（ａ）においては、近端遠端
切り換えスイッチＳは、近端側に接続されている。した
がって、定電流Ｉｃは、直流電源Ｂの〔＋〕側から、電
流ソース線２１の近端Ｊを通り、その漏液点Ｐを経由し
て漏液位置検知線の抵抗線２ａに流れ、その近端Ｉに戻
り、極４５→４４→４２を介して、直流電源Ｂの〔−〕
側（接地点ｇ）に流れる。そのとき、直流電圧計Ｖに
は、導電線３ａを介して、Ｐ点の電位、すなわち漏液点
Ｐから近端Ｉ、極４５−４４−４２（接地点ｇ）までの
電位差が測定されることになる。近端Ｉから接地点ｇま
でのリード線抵抗が抵抗線２ａのＰ−Ｉ間の抵抗に比べ
て無視しうる程度であるから、測定される電圧ＶX は、
抵抗線２ａのＰ−Ｉ間の電圧降下にほぼ等しい。抵抗線
５ａの導体抵抗が長さ方向に均一であり、単位長さあた
りの導体抵抗値をＲ0 とし、漏液位置検知線１の近端Ｉ
から漏液点Ｐまての距離をＸとすると、上記式（１）が
得られる。The near-end / far-end change-over switch S includes the main pole 4
1, 42, near-end side poles 43, 44 and far-end side poles 45, 4
It is composed of 6. In FIG. 3A, the near end / far end changeover switch S is connected to the near end side. Therefore, the constant current Ic flows from the [+] side of the DC power source B through the near end J of the current source line 21 to the resistance line 2a of the leak position detection line via the leak point P, and Returning to the near end I, through the pole 45 → 44 → 42, the DC power source B [-]
Flows to the side (ground point g). At that time, the potential at the point P, that is, the potential difference from the leak point P to the near end I and the pole 45-44-42 (ground point g) is measured by the DC voltmeter V through the conductive wire 3a. become. Since the resistance of the lead wire from the near end I to the ground point g is negligible as compared with the resistance between P and I of the resistance wire 2a, the measured voltage V X is
It is almost equal to the voltage drop across the resistance wire 2a between P and I. The conductor resistance of the resistance wire 5a is uniform in the length direction, the conductor resistance value per unit length is R 0, and the near end I of the liquid leakage position detection wire 1 is
From the above, when the distance to the leak point P is X, the above formula (1) is obtained.
【００３０】図３（ｂ）においては、近端遠端切り換え
スイッチＳは、遠端側に接続されている。したがって、
定電流Ｉｃは、直流電源Ｂの〔＋〕側から、電流ソース
線２１の近端Ｊを通り、その漏液点Ｐを経由して抵抗線
２ａに流れ、その遠端Ｆを経由して、Ｇから導電線３ａ
の近端Ｋに戻り、極４６→４２を介して、直流電源Ｂの
〔−〕側（接地点ｇ）に流れる。そのとき、直流電圧計
Ｖには、抵抗線２ａを介して、Ｐ点の電位、すなわち漏
液点Ｐから遠端Ｆ、Ｇを介し、導電線３ａの近端Ｋ、極
４６→４２（接地点ｇ）までの電位差が測定されること
になる。ここで、抵抗線２ａの単位長さあたりの導体抵
抗Ｒ0 が導電線２ａの単位長さあたりの導体抵抗Ｒ1 を
無視し得るほどに大きく、抵抗線２ａのＰ−Ｆ間の電圧
降下が、導電線３ａのＧ−Ｋ間の電圧降下を無視し得る
ほどに大きいものとすると、測定される電圧ＶY は、抵
抗線２ａのＰ−Ｆ間の電圧降下にほぼ等しい。抵抗線２
ａの導体抵抗が長さ方向に均一であり、単位長さあたり
の導体抵抗値をＲ0 、導電線３ａの単位長さあたりの導
体抵抗値をＲ1 とし、漏液点Ｐから遠端Ｆまでの距離を
Ｙ、漏液位置検知線の全長をＬとすると、
ＶY ＝Ｉｃ×〔（Ｒ0 ×Ｙ）＋（Ｒ1 ×Ｌ）〕 （２）In FIG. 3B, the near end / far end changeover switch S is connected to the far end side. Therefore,
The constant current Ic flows from the [+] side of the DC power source B, through the near end J of the current source line 21, through the leak point P thereof to the resistance line 2a, and through the far end F thereof, Conductive wire 3a from G
Of the DC power source B to the [−] side (ground point g) via the poles 46 → 42. At that time, in the DC voltmeter V, via the resistance wire 2a, the potential at the point P, that is, from the leak point P through the far ends F and G, the near end K of the conductive wire 3a, the pole 46 → 42 (ground point). The potential difference up to g) will be measured. Here, the conductor resistance R 0 per unit length of the resistance wire 2a is so large that the conductor resistance R 1 per unit length of the conductor wire 2a can be ignored, and the voltage drop between P and F of the resistance wire 2a is large. Assuming that the voltage drop between G and K of the conductive wire 3a is negligible, the measured voltage V Y is almost equal to the voltage drop between P and F of the resistance wire 2a. Resistance wire 2
The conductor resistance of a is uniform in the length direction, the conductor resistance value per unit length is R 0 , the conductor resistance value per unit length of the conductive wire 3a is R 1, and the far end F from the leak point P. V Y = Ic × [(R 0 × Y) + (R 1 × L)] (2)
【００３１】Ｉｃ，Ｒ0 ，Ｒ2 、Ｌが既知であるから、
式（１）及び（２）から漏液点までの距離Ｘ又はＹを求
めることができる。そこで、式（２）の両辺を式（１）
の両辺で割ると、
ＶY ／ＶX ＝〔（Ｒ0 ×Ｙ）＋（Ｒ1 ×Ｌ）〕／（Ｒ0 ×Ｘ）（３）
しかるに、
Ｌ＝Ｘ＋Ｙ （４）
であるから、
ＶY ／ＶX ＝〔（Ｒ0 ＋Ｒ1 ）×Ｙ＋Ｒ1 〕／（Ｒ0 ×Ｘ）
＝｛〔１＋（Ｒ1 ／Ｒ0 ）〕×Ｙ＋（Ｒ1 ／Ｒ0 ）｝／Ｘ
導電線３ａの単位長さあたりの導体抵抗Ｒ1 が抵抗線２
ａの単位長さあたりの導体抵抗Ｒ0 に比べて無視し得る
ほどに小さいと次の近似式が成り立つ。
ＶY ／ＶX ≒Ｙ／Ｘ （５）
式（４）から、
Ｙ＝Ｌ−Ｘ
であるから、これを式（５）代入すると、
ＶY ／ＶX ≒（Ｌ／Ｘ）−１
Ｘ＝Ｌ×〔ＶX ／（ＶX ＋ＶY ）〕 （６）
同様にして、
Ｙ＝Ｌ×〔ＶY ／（ＶX ＋ＶY ）〕 （７）
式（７）には単位長さあたりの抵抗値Ｒ0 、Ｒ1 が含ま
れないので、ＶX やＶ Y が測定されると、近端又は遠端
から漏液点Ｐまでの距離Ｘ又はＹは、抵抗線２ａ，導電
線３ａの単位長さあたりの導体抵抗値Ｒ0 、Ｒ1 に関係
なく得られる。Ic, R0, R2, L is known,
Find the distance X or Y from equations (1) and (2) to the leak point
Can be turned on. Therefore, the both sides of the equation (2) are replaced by the equation (1)
Divide by both sides of
VY/ VX= [(R0× Y) + (R1× L)] / (R0× X) (3)
However,
L = X + Y (4)
Therefore,
VY/ VX= [(R0+ R1) × Y + R1] / (R0× X)
= {[1+ (R1/ R0)] × Y + (R1/ R0)} / X
Conductor resistance R per unit length of the conductive wire 3a1Is resistance wire 2
Conductor resistance R per unit length of a0Can be ignored compared to
If it is so small, the following approximate expression holds.
VY/ VX≈ Y / X (5)
From equation (4),
Y = L-X
Therefore, when substituting this into equation (5),
VY/ VX≈ (L / X) -1
X = L × [VX/ (VX+ VY)] (6)
Similarly,
Y = L × [VY/ (VX+ VY)] (7)
In equation (7), the resistance value R per unit length0, R1Contains
Because it is not possible, VXAnd V YIs measured, near end or far end
The distance X or Y from the leak point to the leak point P is the resistance wire 2a, the conductivity.
Conductor resistance value R per unit length of the wire 3a0, R1Related to
Obtained without.
【００３２】次に、図４に基づいて、漏液検知システム
の第２の実施形態２０について説明する。漏液検知シス
テム２０は、遮水シートが２枚の場合に適用される（図
６参照）。第１の実施形態１５と異なるところは、遮水
シートが、上下２枚の遮水シート６１，６２で構成され
るため、漏液位置検知線１を、２枚の遮水シート６１、
６２の間に敷設して共用とし、電流ソース線を遮水シー
ト６１の上面に敷設される上側電流ソース線２１と、下
側遮水シート６２の下面に敷設される下側電流ソース線
２２の２本とし、これらの端部（図示例では、近端Ｊ
１，Ｊ２）及び漏液位置検知線の端部（図示例では、近
端Ｉ、Ｋ）を検知器２５の端子２６，２７、２８，２９
にそれぞれ接続したものである。Next, a second embodiment 20 of the leak detection system will be described with reference to FIG. The liquid leakage detection system 20 is applied when there are two water shield sheets (see FIG. 6). The different point from the first embodiment 15 is that the water blocking sheet is composed of upper and lower two water blocking sheets 61 and 62, so that the liquid leakage position detection line 1 is connected to the two water blocking sheets 61,
The current source line is laid between the upper side current source line 21 and the lower side current source line 22 laid on the lower surface of the lower water shield sheet 62. There are two, and these ends (in the illustrated example, the near end J
1, J2) and the ends (near ends I and K in the illustrated example) of the liquid leakage position detection line are connected to terminals 26, 27, 28, 29 of the detector 25.
Connected to each.
【００３３】検知器２５において、直流電源Ｂ及び電流
制御器Ｃからなる定電流電源Ｄは電流計Ａ及び電流ソー
ス線切り替えスイッチＳ２を介して、端子２６，２７に
切り替え可能に接続されている。そして、電流ソース線
切り替えスイッチＳ２は、端子２６を介して電流ソース
線２１に接続される極４７と端子２７を介して電流ソー
ス線２２に接続される極４８と電流計Ａに接続された極
４９とを備えている。また、近端遠端切り替えスイッチ
Ｓ１は、端子２８，２９間に接続される。近端遠端切り
替えスイッチＳ１の構成は、図３の近端遠端切り替えス
イッチＳと同じである。そして、直流電圧計Ｖは、近端
遠端切り替えスイッチＳ１を介して、抵抗線２ａの両端
の電圧を測定できるように接続されている。In the detector 25, a constant current power source D including a DC power source B and a current controller C is switchably connected to terminals 26 and 27 via an ammeter A and a current source line changeover switch S2. The current source line changeover switch S2 includes a pole 47 connected to the current source line 21 via the terminal 26, a pole 48 connected to the current source line 22 via the terminal 27, and a pole connected to the ammeter A. And 49. The near-end / far-end change-over switch S1 is connected between the terminals 28 and 29. The configuration of the near end / far end changeover switch S1 is the same as that of the near end / far end changeover switch S in FIG. The DC voltmeter V is connected via the near-end / far-end changeover switch S1 so that the voltage across the resistance wire 2a can be measured.
【００３４】次に、動作について説明する。遮水シート
６１の点Ｐ1 に漏液が生じたときは、電流ソース線切り
替えスイッチＳ２を電流ソース線２１側の極４７に接続
すると、電流ソース線２１と漏液位置検知線１の抵抗線
２ａとの間に漏液Ｅ1 と半導電性被覆２ｂを介して定電
流Ｉｃが流れる。さらに近端遠端切り換えスイッチＳ１
が、近端側に接続されていると、抵抗線2ａの漏液点Ｐ
1 から近端Ｉへと電流が流れ、端子２８、近端遠端切り
換えスイッチＳ１を介して、接地点ｇに流れる。そのと
き、直流電圧計Ｖには、導電線３ａを介して、Ｐ点の電
位、すなわち漏液点Ｐから接地点ｇまでの電位差が測定
されることになる。以下、図３の漏液検知システムの場
合と同様にして漏液点Ｐ1 の位置が検知できる。Next, the operation will be described. When liquid leakage occurs at the point P 1 of the water shield sheet 61, if the current source line changeover switch S2 is connected to the pole 47 on the side of the current source line 21, the resistance line of the current source line 21 and the liquid leakage position detection line 1 A constant current Ic flows through the leaked liquid E 1 and the semiconductive coating 2b between the 2a and 2a. Furthermore, near end far end changeover switch S1
However, if it is connected to the near end side, the leakage point P of the resistance wire 2a
A current flows from 1 to the near end I, and flows to the ground point g via the terminal 28 and the near end / far end changeover switch S1. At that time, the potential at the point P, that is, the potential difference from the leak point P to the ground point g is measured by the DC voltmeter V via the conductive wire 3a. Hereinafter, the position of the leak point P 1 can be detected in the same manner as in the leak detection system of FIG.
【００３５】同様にして、遮水シート６２の点Ｐ2 に漏
液Ｅ2 が生じたときは、電流ソース線切り替えスイッチ
Ｓ２を電流ソース線２２側の極４８に接続すると、電流
ソース線２２と漏液位置検知線１の抵抗線２ａとの間に
漏液Ｅ2 と半導電性被覆２ｂを介して抵抗線 2ａに定電
流Ｉｃが流れる。近端遠端切り換えスイッチＳ１が、近
端側に接続されていると、抵抗線２ａの漏液点Ｐ2 から
近端Ｉへと電流が流れ、端子２９、近端遠端切り替えス
イッチＳ１を介して、接地点ｇに流れる。そのとき、直
流電圧計Ｖには、導電線３ａを介して、Ｐ2 点の電位、
すなわち漏液点Ｐ2 から接地点ｇまでの電位差が測定さ
れることになる。以下、図3 の漏液検知システムの場合
と同様にして漏液点Ｐ2 の位置が検知できる。Similarly, when the liquid leakage E 2 occurs at the point P 2 on the water blocking sheet 62, the current source line 22 is connected to the current source line 22 by connecting the current source line changeover switch S2 to the pole 48 on the side of the current source line 22. constant current Ic to the resistance line 2a via the leakage E 2 with a semiconductive coating 2b between the resistance wire 2a may leak position sensing line 1 flows. When the near end / far end changeover switch S1 is connected to the near end side, a current flows from the leak point P 2 of the resistance wire 2a to the near end I, and via the terminal 29 and the near end far end changeover switch S1. Flow to the ground point g. At that time, the DC voltmeter V is connected to the electric potential at the point P 2 via the conductive wire 3a,
That is, the potential difference from the leak point P 2 to the ground point g is measured. After that, the position of the leak point P 2 can be detected in the same manner as in the leak detection system of FIG.
【００３６】上記漏液検知システムにおいて、漏液位置
検知線１と、電流ソース線２１，２２とは、ほぼ平行に
配設されるのが好ましいが、遮水シート６１，６２を挟
んでともに面状に配設されるようにし、互いに多数の点
で交差するようにしてもよい。漏液位置検知線１及び電
流ソース線２１，２２を面状に敷設する方法は、地形に
合わせて、全長を適宜の長さごとに折り返し蛇行させつ
つ面状に形成してもよいし、適宜の長さのものを面状に
配設して接続してもよい。In the above liquid leakage detection system, it is preferable that the liquid leakage position detection line 1 and the current source lines 21 and 22 are arranged substantially parallel to each other, but both surfaces are sandwiched by the water shield sheets 61 and 62. They may be arranged in a shape and intersect each other at many points. As a method of laying the liquid leakage position detection line 1 and the current source lines 21 and 22 in a planar shape, it may be formed in a planar shape while being folded and meandering the entire length at an appropriate length according to the terrain. You may arrange | position the thing of length and arrange | position in a plane shape, and connect it.
【００３７】以上の漏液検知システムにおいて、電流ソ
ース線２１、２２は、裸銅線であってもよいが、耐腐食
性の点からいえば、被覆抵抗線の半導電性の被覆と同
様、半導電性の高分子材料を被覆したものとしてもよ
い。また、漏液位置検知線としては、漏液位置検知線１
を用いるものとして説明したが、もちろん漏液位置検知
線１０を用いたものとしてもよい。近端遠端切り替えス
イッチＳ，Ｓ１及び電流ソース線切り替えスイッチＳ２
は，手動スイッチとして説明したが、もちろんリレーや
電子スイッチなどを用いても良い。In the above liquid leakage detection system, the current source lines 21 and 22 may be bare copper wires, but from the viewpoint of corrosion resistance, like the semiconductive coating of the coated resistance wire, It may be coated with a semiconductive polymer material. As the liquid leakage position detection line, the liquid leakage position detection line 1
However, the liquid leakage position detection line 10 may be used as a matter of course. Near end far end changeover switches S, S1 and current source line changeover switch S2
In the above description, a manual switch is used, but of course a relay, an electronic switch or the like may be used.
【００３８】[0038]
【実施例】次に、実施例による漏液位置検知の実例につ
いて説明する。図５において、１は、表１に示す構造・
寸法を有する全長６０ｍの漏液位置検知線であり、被覆
抵抗線及び被覆リード線の近端Ｉ，Ｋから遠端Ｆ，Ｇま
でを１０ｍごとに折り返し蛇行させて面状に敷設した。
被覆抵抗線の抵抗線の近端Ｉを、抵抗線用リード線２３
を介し、被覆リード線のなかの導電線の遠端Ｇを、被覆
リード線用リード線２４を介して、それぞれ検知器２５
に接続した。被覆リード線の導電線が、近端Ｋではなく
遠端Ｇにおいて検知器２５に接続されている点で、図３
及び図４の場合と異なるが、測定原理上変わるところが
ないことは容易に理解できよう。EXAMPLE Next, an actual example of liquid leakage position detection according to an example will be described. In FIG. 5, 1 is the structure shown in Table 1.
It is a liquid leakage position detection line having a total length of 60 m, and the coated resistance wire and the coated lead wire are laid in a plane shape by meandering every 10 m from the near ends I and K to the far ends F and G.
Connect the near end I of the resistance wire of the coated resistance wire to the resistance wire lead wire 23.
The far end G of the conductive wire in the coated lead wire is connected to the detector 25 via the coated lead wire 24.
Connected to. In that the conducting wire of the coated lead is connected to the detector 25 at the far end G instead of the near end K, FIG.
It is easy to understand that there is no change in the measurement principle, although it is different from the case of FIG.
【００３９】[0039]
【表１】 [Table 1]
【００４０】電流ソース線２１には、４ｍｍの裸軟銅線
を用い、次に示すように被覆抵抗線に直接接触させるか
又は水道水での水溜りをつくりそれを介して接触させ
た。
＜測定方法１＞ 電流ソース線２１を漏液位置検知線１
の漏液位置模擬点として近端Ｉから５ｍ，１５ｍ，２５
ｍ，３５ｍ，４５ｍ、５５ｍの点Ｐ5,Ｐ15, Ｐ 25, Ｐ
35, Ｐ45, Ｐ55に被覆抵抗線２１を順次直接触させて測
定した。
＜測定方法２＞ 漏液位置検知線１の漏液位置模擬点Ｐ
5,Ｐ15, Ｐ25, Ｐ35,Ｐ45, Ｐ55上に水道水の水溜りＥ
5 ，Ｅ15，Ｅ25，Ｅ35，Ｅ45，Ｅ55を順次つくり、その
都度その水溜りを介して、電流ソース線２１をその外周
と被覆抵抗線の外周との間に２〜３ｍｍの間隔をあけて
配設し、測定した。測定結果を表２に示す。The current source wire 21 is a 4 mm bare annealed copper wire.
To directly contact the coated resistance wire as shown below.
Or make a pool of tap water and make contact through it
It was
<Measurement method 1> Connect the current source line 21 to the leak position detection line 1
5m, 15m, 25 from the near end I as a liquid leakage position simulation point
Point P of m, 35m, 45m, 55mFive,P15,P twenty five,P
35,P45,P55Directly contact the coated resistance wire 21 with the
Decided
<Measurement method 2> Liquid leakage position simulation point P on the liquid leakage position detection line 1
Five,P15,Ptwenty five,P35,P45,P55Pool E of tap water
Five, E15, Etwenty five, E35, E45, E55And make the
The current source line 21 is connected to the outer circumference through the pool each time.
And the outer circumference of the coated resistance wire with a space of 2-3 mm
It was arranged and measured. The measurement results are shown in Table 2.
【００４１】[0041]
【表２】 [Table 2]
【００４２】測定結果は、漏液位置模擬点Ｐ5,Ｐ15, Ｐ
25, Ｐ35, Ｐ45, Ｐ55の近端からの距離を正確に示して
いる。The measurement results are the leak position simulated points P 5, P 15, P.
The distances from the near ends of 25, P 35, P 45, and P 55 are accurately shown.
【００４３】[0043]
【発明の効果】以上に説明したように、本発明の請求項
１記載の発明によれば、抵抗線には、耐液性で半導電性
の高分子部材が被覆され、被覆リード線は、導電線の上
に耐液性の絶縁部材を被覆してあるので、抵抗線や導電
線が腐食されることがなく、また被覆抵抗線の被覆は半
導電性であるから、抵抗線を電極として他の電極線との
間に電圧を加えれば、電極線間への液体の浸入などによ
る電気特性の変化を検知することができる。そして、被
覆抵抗線と被覆リード線は連接して一体化されているの
で、曲げ方向が短径方向に限定されるが、抵抗線と導電
線との間に剛性のちがいがあってもキンクを生じること
がないから、取り扱いが容易である。As described above, according to the first aspect of the present invention, the resistance wire is covered with the liquid-resistant and semiconductive polymer member, and the covered lead wire is Since the resistance wire or conductive wire is not corroded because the conductive wire is covered with a liquid-resistant insulating member, and the covering resistance wire is semi-conductive, the resistance wire is used as an electrode. By applying a voltage between the other electrode lines, it is possible to detect a change in electrical characteristics due to infiltration of liquid between the electrode lines. And since the covered resistance wire and the covered lead wire are connected and integrated, the bending direction is limited to the minor axis direction, but even if there is a difference in rigidity between the resistance wire and the conductive wire, there is a kink. Since it does not occur, it is easy to handle.
【００４４】請求項２記載の発明によれば、請求項１記
載の発明の効果に加えて、適度の導電性を有する半導電
性の高分子部材で被覆された被覆抵抗線が安価に得られ
るので、漏液位置検知線も安価となる。According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, a coated resistance wire coated with a semiconductive polymer member having an appropriate conductivity can be obtained at low cost. Therefore, the liquid leakage position detection line is also inexpensive.
【００４５】請求項３記載の発明によれば、請求項１又
は２記載の発明の効果に加えて、被覆抵抗線と被覆リー
ド線との一括押し出しが可能となり、被覆抵抗線及び被
覆リード線の形成と連接・一体化が同時に行われ量産に
適している。According to the third aspect of the invention, in addition to the effect of the first or second aspect of the invention, the coated resistance wire and the coated lead wire can be extruded together, and the coated resistance wire and the coated lead wire It is suitable for mass production because it is formed, connected and integrated at the same time.
【００４６】請求項４記載の発明によれば、請求項１乃
至３のいずれかに記載の発明の効果に加えて、抵抗線の
端部から漏液位置までの導体抵抗を測定することによ
り、漏液位置の検知ができ、しかも被覆リード線中の導
電線を測定用のリード線として用いることができるので
測定が容易である。According to the invention of claim 4, in addition to the effect of the invention of any one of claims 1 to 3, by measuring the conductor resistance from the end of the resistance wire to the liquid leakage position, Since the position of liquid leakage can be detected and the conductive wire in the coated lead wire can be used as a lead wire for measurement, the measurement is easy.
【００４７】請求項５記載の発明によれば、請求項１乃
至４のいずれかに記載の発明の効果に加えて、連接・一
体化された被覆抵抗線と被覆リード線は、保護編組体に
より、いっそう確実に一体化され、ばらけたりするおそ
れがないので丈夫で取り扱いが容易である。According to the invention described in claim 5, in addition to the effect of the invention described in any one of claims 1 to 4, the connected / integrated covered resistance wire and the covered lead wire are formed by a protective braid. , It is stronger and easier to handle because it is more surely integrated and there is no danger of it coming apart.
【００４８】請求項６記載の発明によれば 遮水シート
の損傷により、漏液が生じると、漏液位置検知線の抵抗
線と、遮水シートを挟んで反対側に敷設された電流ソー
ス線との間に定電流電源からの電流が流れ、電圧測定手
段によって抵抗線の両端の電圧を測定すると、抵抗線の
端部から漏液点までの距離が分かり、漏液位置が検知で
きる。また抵抗線には、耐液性で半導電性の高分子部材
が被覆され、被覆リード線は、導電線の上に耐液性の絶
縁部材を被覆してあるので、抵抗線や導電線が腐食され
ることがなく、また被覆抵抗線の被覆は半導電性である
から、抵抗線と電流ソース線との間に電圧を加えれば、
その間への液体の浸入などによる電気特性の変化を検知
することができる。そして、被覆抵抗線と被覆リード線
は連接して一体化されているので、曲げ方向が短径方向
に限定されるが、抵抗線と導電線との間に剛性のちがい
があってもキンクを生じることがない。したがって、漏
液検知システムとして、敷設や取り扱いが容易であり、
長期間の使用に耐える。According to the sixth aspect of the present invention, when liquid leakage occurs due to damage to the water blocking sheet, the resistance wire of the liquid leakage position detection line and the current source line laid on the opposite side of the water blocking sheet. When a current from a constant current power source flows between and the voltage across the resistance wire is measured by the voltage measuring means, the distance from the end of the resistance wire to the leak point can be known and the leak position can be detected. Further, the resistance wire is covered with a liquid-resistant and semi-conductive polymer member, and the coated lead wire is covered with a liquid-resistant insulating member on the conductive wire. Since it is not corroded and the coating of the coated resistance wire is semi-conductive, if a voltage is applied between the resistance wire and the current source wire,
It is possible to detect a change in electrical characteristics due to infiltration of liquid into the space. And since the covered resistance wire and the covered lead wire are connected and integrated, the bending direction is limited to the minor axis direction, but even if there is a difference in rigidity between the resistance wire and the conductive wire, there is a kink. It never happens. Therefore, it is easy to install and handle as a leak detection system,
Withstands long-term use.
【００４９】請求項７記載の発明によれば、請求項６記
載の発明の効果に加えて、上下２枚の遮水シートの間に
漏液位置検知線を、上側遮水シートの上面に上側電流ソ
ース線を、下側遮水シートの下面に下側電流ソース線
を、それぞれ敷設し、漏液位置検知線中の抵抗線と上側
及び下側電流ソース線との間にそれぞれ定電流電源から
定電流を供給するようにすれば、電圧測定手段により抵
抗線の両端の電圧を測定することにより上下２枚の遮水
シートのいずれに損傷が生じてもそこからの漏液を検知
し、その位置を検知することができるので、遮水シート
が２枚ある場合でも、漏液位置検知が確実に行われ、２
枚の使用を容易にする。According to the invention described in claim 7, in addition to the effect of the invention described in claim 6, a liquid leakage position detection line is provided between the upper and lower two water-blocking sheets on the upper surface of the upper water-blocking sheet. Install the current source line and the lower current source line on the lower surface of the lower water-blocking sheet respectively, and connect the constant current source between the resistance line in the leak position detection line and the upper and lower current source lines. If a constant current is supplied, the voltage measuring means measures the voltage across the resistance wire to detect liquid leakage from any of the upper and lower water-blocking sheets, and to detect the leakage from that. Since the position can be detected, even if there are two water-blocking sheets, the leak position can be reliably detected and
Facilitates the use of sheets.
【図１】本発明の漏液位置検知線の第１の実施形態の斜
視図である。FIG. 1 is a perspective view of a first embodiment of a liquid leakage position detection line of the present invention.
【図２】本発明の漏液位置検知線の第２の実施形態の斜
視図である。FIG. 2 is a perspective view of a second embodiment of the liquid leakage position detection line of the present invention.
【図３】本発明の漏液検知システムの第１の実施形態の
説明図である。FIG. 3 is an explanatory diagram of the first embodiment of the leak detection system of the present invention.
【図４】本発明の漏液検知システムの第２の実施形態の
説明図である。FIG. 4 is an explanatory diagram of a second embodiment of the liquid leakage detection system of the present invention.
【図５】本発明の実施例による位置検知の実験の説明図
である。FIG. 5 is an explanatory diagram of a position detection experiment according to an embodiment of the present invention.
【図６】漏液検知システムの使用例の説明図である。FIG. 6 is an explanatory diagram of a usage example of the liquid leakage detection system.
【図７】漏液検知システムの原理の説明図である。FIG. 7 is an explanatory diagram of the principle of the liquid leakage detection system.
【図８】従来の漏液検知線の斜視図である。FIG. 8 is a perspective view of a conventional leak detection line.
１，１０ 漏液位置検知線 ２ 被覆抵抗線 ２ａ 抵抗線 ２ｂ 半導電性の被覆 ３ 被覆リード線 ３ａ 導電線 ３ｂ 絶縁被覆 ４ 連接部 １１ 保護編組体 １５，２０ 漏液検知システム ２１，２２ 電流ソース線 ２５ 検知器 ５０ 廃棄物処分場 ６０ 地盤 ６１，６２ 遮水シート Ａ，Ａ１，Ａ２ 直流電流計 Ｃ，Ｃ１，Ｃ２ 電流制御器 Ｄ，Ｄ１，Ｄ２ 定電流電源 Ｖ 直流電圧計 1,10 Liquid leakage position detection line 2 coated resistance wire 2a resistance wire 2b Semi-conductive coating 3 coated lead wire 3a Conductive wire 3b insulation coating 4 connecting parts 11 Protective braid 15, 20 Leakage detection system 21,22 Current source line 25 detectors 50 Waste disposal site 60 ground 61,62 Impermeable sheet A, A1, A2 DC ammeter C, C1, C2 current controller D, D1, D2 constant current power supply V DC voltmeter
Claims (7)
リード線とを連接して一体化してなり、 前記被覆抵抗線は、導体抵抗が長さ方向に均一な抵抗線
の上に耐液性で半導電性の高分子部材を被覆してなり、 前記被覆リード線は、導電線の上に耐液性の絶縁部材を
被覆してなることを特徴とする漏液位置検知線。1. A covered resistance wire and a covered lead wire, which are arranged substantially parallel to each other, are connected and integrated, and the covered resistance wire is formed on a resistance wire whose conductor resistance is uniform in the length direction. A liquid leakage position detection line comprising a liquid semiconductive polymer member coated, wherein the coated lead wire comprises a conductive wire coated with a liquid resistant insulating member.
て、 前記被覆抵抗線の被覆は、導電性粉を含有する高分子部
材からなることを特徴とする漏液位置検知線。2. The liquid leakage position detection line according to claim 1, wherein the coating of the coated resistance wire is made of a polymer member containing a conductive powder.
おいて、 前記被覆抵抗線の被覆及び前記被覆リード線の絶縁部材
は、基材がともに押出成形可能な高分子部材からなるこ
とを特徴とする漏液位置検知線。3. The liquid leakage position detection wire according to claim 1, wherein the covering of the covering resistance wire and the insulating member of the covering lead wire are made of a polymer member whose base material is extrudable. Characteristic liquid leakage position detection line.
位置検知線において、 前記被覆リード線の導電線の導体抵抗は、前記被覆抵抗
線の抵抗線の導体抵抗に比して無視し得るほどに小さい
ことを特徴とする漏液位置検知線。4. The liquid leakage position detection wire according to claim 1, wherein the conductor resistance of the conductive wire of the coated lead wire is neglected as compared with the conductor resistance of the resistance wire of the coated resistance wire. A liquid leakage position detection line characterized by being small enough to be possible.
位置検知線において、 前記被覆抵抗線及び前記被覆リード線に外接して包被す
る保護編組体を有することを特徴とする漏液位置検知
線。5. The liquid leakage position detection wire according to claim 1, further comprising a protective braid that circumscribes and covers the coated resistance wire and the coated lead wire. Liquid position detection line.
水シートの損傷による漏液を検知する漏液検知システム
において、 前記遮水シートの片側に敷設された請求項１乃至５のい
ずれかに記載の漏液位置検知線と、 前記遮水シートを挟んで前記漏液位置検知線と反対側に
敷設され、前記漏液位置検知線中の抵抗線との間の電気
特性の変化を検知するための電流ソース線と、 前記抵抗線と前記電流ソース線との間に定電流を供給す
る定電流電源と、 前記抵抗線の両端の電圧を測定する電圧測定手段とを備
えたことを特徴とする漏液検知システム。6. A liquid leakage detection system for detecting liquid leakage due to damage to a water barrier sheet for blocking the outflow of liquid from deposits, etc., wherein the liquid barrier sheet is laid on one side of the water barrier sheet. Liquid leakage position detection line according to, and is laid on the opposite side of the liquid leakage position detection line across the water-impervious sheet, the change in the electrical characteristics between the resistance line in the liquid leakage position detection line A current source line for detecting, a constant current power supply for supplying a constant current between the resistance line and the current source line, and a voltage measuring means for measuring the voltage across the resistance line. A characteristic leak detection system.
て、 前記遮水シートは、上下２枚の遮水シートからなり、 前記上下２枚の遮水シートの間に敷設される請求項１乃
至５のいずれかに記載の漏液位置検知線と、 前記上側遮水シートの上面に敷設される上側電流ソース
線と、 前記下側遮水シートの下面に敷設される下側電流ソース
線と、 前記漏液位置検知線中の抵抗線と前記上側及び下側電流
ソース線との間にそれぞれ定電流を供給する定電流電源
と、 前記抵抗線の両端の電圧を測定する電圧測定手段とを備
えたことを特徴とする漏液検知システム。7. The liquid leakage detection system according to claim 6, wherein the water blocking sheet is composed of two upper and lower water blocking sheets, and is laid between the two upper and lower water blocking sheets. 5. A liquid leakage position detection line according to any one of 5, an upper current source line laid on the upper surface of the upper water blocking sheet, a lower current source line laid on the lower surface of the lower water blocking sheet, A constant current power supply for supplying a constant current between the resistance wire in the liquid leakage position detection wire and the upper and lower current source wires, and a voltage measuring means for measuring the voltage across the resistance wire. A leak detection system characterized in that
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001308555A JP3693946B2 (en) | 2001-10-04 | 2001-10-04 | Leak position detection line and leak detection system using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001308555A JP3693946B2 (en) | 2001-10-04 | 2001-10-04 | Leak position detection line and leak detection system using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003114161A true JP2003114161A (en) | 2003-04-18 |
| JP3693946B2 JP3693946B2 (en) | 2005-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001308555A Expired - Fee Related JP3693946B2 (en) | 2001-10-04 | 2001-10-04 | Leak position detection line and leak detection system using the same |
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|---|---|
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006068142A1 (en) * | 2004-12-21 | 2006-06-29 | Matsushita Electric Industrial Co., Ltd. | Gas detection sensor and gas detector |
| JP2010084384A (en) * | 2008-09-30 | 2010-04-15 | Jfe Steel Corp | Steel sheet pile, impervious wall using the same, and method for estimating damage to water sealing rubber |
| JP2016123549A (en) * | 2014-12-26 | 2016-07-11 | 日本毛織株式会社 | Liquid detection cloth |
-
2001
- 2001-10-04 JP JP2001308555A patent/JP3693946B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006068142A1 (en) * | 2004-12-21 | 2006-06-29 | Matsushita Electric Industrial Co., Ltd. | Gas detection sensor and gas detector |
| JP2010084384A (en) * | 2008-09-30 | 2010-04-15 | Jfe Steel Corp | Steel sheet pile, impervious wall using the same, and method for estimating damage to water sealing rubber |
| JP2016123549A (en) * | 2014-12-26 | 2016-07-11 | 日本毛織株式会社 | Liquid detection cloth |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3693946B2 (en) | 2005-09-14 |
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