JPH0915080A - Water leak position detector - Google Patents
Water leak position detectorInfo
- Publication number
- JPH0915080A JPH0915080A JP7159607A JP15960795A JPH0915080A JP H0915080 A JPH0915080 A JP H0915080A JP 7159607 A JP7159607 A JP 7159607A JP 15960795 A JP15960795 A JP 15960795A JP H0915080 A JPH0915080 A JP H0915080A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- electrodes
- water
- potential difference
- sheet
- 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
Landscapes
- Examining Or Testing Airtightness (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、合成樹脂または合成ゴ
ムシート或はアスファルトなどの遮水シートを敷設して
造成された管理型終末処理場における漏水発生位置検出
装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water leakage generation position detecting device in a management type final disposal site constructed by laying a waterproof sheet such as synthetic resin or synthetic rubber sheet or asphalt.
【０００２】[0002]
【従来の技術】従来、遮水シートを用いた人工的な管理
型終末処理場においては、遮水シートに亀裂などの破損
を生じて処理場内の汚染液が漏水することがある。漏水
が発生すると地下水汚染等の公害問題が発生するため、
定期的に遮水シートの点検を行い、漏水の発生箇所を検
出することで遮水シートの破損箇所を検出して適当な補
修を行う必要がある。2. Description of the Related Art Conventionally, in an artificial management type final treatment plant using a water-blocking sheet, the water-blocking sheet may be damaged by cracks or the like and the contaminated liquid in the treatment site may leak. When water leakage occurs, pollution problems such as groundwater pollution will occur,
It is necessary to regularly inspect the impermeable sheet and detect the location of leakage to detect the damaged part of the impermeable sheet and perform appropriate repairs.
【０００３】遮水シートにおける漏水発生位置を検出す
る方法として、次のような方法が知られている。この方
法では、遮水シートが電気的絶縁特性を示すことから、
処理場の内側に電圧印加電極（通電電極）と複数の電位
測定電極とを埋設し、処理場の外側には地中電極を埋設
して電圧印加電極と地中電極との間に交流電圧を加えて
処理場内に電位分布を形成させ、電位測定電極により電
位分布を測定する。The following method is known as a method for detecting the position of water leakage on the water blocking sheet. In this method, since the water-impervious sheet exhibits electrical insulation characteristics,
A voltage applying electrode (current-carrying electrode) and a plurality of potential measuring electrodes are embedded inside the treatment plant, and an underground electrode is embedded outside the treatment plant so that an AC voltage is applied between the voltage application electrode and the underground electrode. In addition, a potential distribution is formed in the treatment site, and the potential distribution is measured by the potential measuring electrode.
【０００４】この方法によれば、遮水シートに破損が無
ければ処理場内部の電位分布は、電圧印加電極から離れ
るに従って一定の減衰率で低下する傾向を示す。一方、
遮水シートに破損が生じれば破損箇所に近い電位測定電
極において電位分布に異常が生じることから、電位測定
結果より等電位曲線を描くことで遮水シートの破損箇所
が検出される。According to this method, the potential distribution inside the treatment plant tends to decrease at a constant attenuation rate as the distance from the voltage application electrode increases, unless the water-blocking sheet is damaged. on the other hand,
If the water shield sheet is damaged, the potential distribution electrode in the potential measurement electrode near the damaged portion becomes abnormal, and therefore, the damaged portion of the water shield sheet can be detected by drawing an equipotential curve from the potential measurement result.
【０００５】この方式を図９，図１０を参照して詳しく
説明する。図９は従来例による漏水発生位置検出装置の
測定原理を説明するための図である。図１０は図９に示
された検出装置による測定結果の例を示す図である。図
９に示された検出装置では、処理場９０内部に一つの通
電電極９１が埋設されていると共に、複数の測定電極９
２が格子状に間隔をおいて埋設されている。処理場９０
内部の通電電極９１と処理場９０外部に埋設された地中
電極９３との間に交流電源９４から電圧を印加し、複数
の測定電極９２のすべてについて電圧計９５で処理場９
０内部に広がる電位分布の測定を行うことで遮水シート
９６の破損箇所を検出する。This method will be described in detail with reference to FIGS. 9 and 10. FIG. 9 is a diagram for explaining the measurement principle of a conventional water leakage position detecting device. FIG. 10 is a diagram showing an example of measurement results obtained by the detection device shown in FIG. In the detection device shown in FIG. 9, one energization electrode 91 is embedded inside the treatment site 90, and a plurality of measurement electrodes 9 are included.
2 are embedded at intervals in a grid pattern. Treatment plant 90
A voltage is applied from an AC power supply 94 between the internal energizing electrode 91 and the underground electrode 93 buried outside the treatment plant 90, and the voltmeter 95 is used to treat all of the plurality of measurement electrodes 92 with the treatment plant 9
The broken portion of the water-blocking sheet 96 is detected by measuring the potential distribution spreading inside 0.
【０００６】すなわち、遮水シート９６に漏水の原因と
なる破損が生じると、破損箇所９７を通して流れる電流
経路（図９中、破線で示す）が形成されるため、図１０
に示されたように等電位分布曲線に乱れが生じる。That is, when the water shield sheet 96 is damaged to cause water leakage, a current path (shown by a broken line in FIG. 9) flowing through the damaged portion 97 is formed.
Distortion occurs in the equipotential distribution curve as shown in FIG.
【０００７】このように電位分布の乱れから遮水シート
９６の破損箇所９７を検出する方式では、遮水シート９
６による静電容量成分を介して流れる電流成分が存在す
ることから、電位測定には誤差が含まれることになる。
また、処理場９０内部の土中の電気伝導度の不均一性に
よる誤差も測定結果に含まれることになる。As described above, in the method of detecting the damaged portion 97 of the waterproof sheet 96 from the disturbance of the potential distribution, the waterproof sheet 9 is
Since there is a current component flowing through the electrostatic capacitance component due to 6, the potential measurement includes an error.
Further, the measurement result also includes an error due to the non-uniformity of electric conductivity in the soil inside the treatment plant 90.
【０００８】[0008]
【発明が解決しようとする課題】上記のように、従来の
漏水発生位置検出装置では、交流印加電圧の振幅成分を
測定する。このため、遮水シートを流れる電流成分と遮
水シートの破損部分を流れる電流成分を同時に検出する
ことから、測定結果には遮水シートを流れる電流成分が
誤差要因として重畳されることにより、破損箇所の特定
において位置精度が低いという欠点があった。また、従
来方式では遮水シートの破損箇所を検出するのみで、破
損の程度、すなわち大きさまでは推定出来ないという欠
点があった。As described above, in the conventional water leak occurrence position detecting device, the amplitude component of the AC applied voltage is measured. For this reason, the current component flowing through the impermeable sheet and the current component flowing through the damaged part of the impermeable sheet are detected at the same time. There is a drawback that the position accuracy is low in specifying the location. Further, the conventional method has a drawback that it cannot detect the degree of damage, that is, the size of damage, only by detecting the damaged portion of the water-blocking sheet.
【０００９】本発明は、破損箇所のみならず破損の程度
をも検出できる漏水発生位置検出装置を提供することを
課題とする。An object of the present invention is to provide a water leakage generation position detecting device capable of detecting not only a damaged portion but also the degree of damage.
【００１０】[0010]
【課題を解決するための手段】本発明によれば、遮水シ
ートを敷設して造成された管理型終末処理場において、
処理場内で前記遮水シートの上側に所定の間隔で埋設さ
れた複数の第１の電極と、前記遮水シートの外側に埋設
された第２の電極と、交流電源と、前記複数の第１の電
極から１つを順に選択し、選択された第１の電極と前記
第２の電極との間に前記交流電源の交流電圧を順に印加
するための第１の電極切換器と、前記選択された第１の
電極と前記第２の電極との間に流れる電流を検出する電
流検出回路と、この電流検出回路の出力と前記交流電源
の出力を受けて該交流電圧の位相を基準として前記電流
検出回路の出力信号の位相検波を行う位相検波回路とを
備え、前記第１の電極切換器により前記第１の電極を順
次選択して前記選択された第１の電極と前記第２の電極
間の電流の位相検波を行うことにより、遮水シートの破
損による漏水発生箇所に近い電極の組合せになった際に
電極間を流れる電流が他の電極間の値よりも上昇するこ
とから漏水発生位置を検出することを特徴とする漏水発
生位置検出装置が得られる。According to the present invention, in a management type final disposal plant constructed by laying a water blocking sheet,
In the treatment plant, a plurality of first electrodes embedded at a predetermined interval above the water shield sheet, second electrodes embedded outside the water shield sheet, an AC power supply, and the plurality of first electrodes. A first electrode selector for sequentially applying an alternating voltage of the alternating current power supply between the selected first electrode and the second electrode, and the selected electrode. And a current detection circuit for detecting a current flowing between the first electrode and the second electrode, the current detection circuit receiving the output of the current detection circuit and the output of the AC power supply, and the current based on the phase of the AC voltage. A phase detection circuit that performs phase detection of the output signal of the detection circuit, wherein the first electrodes are sequentially selected by the first electrode switching device to select between the selected first electrode and the second electrode. Water leakage occurs due to damage to the impermeable sheet by performing phase detection of the current Current flowing between the electrodes when it becomes a combination of the electrodes other than the value between the electrodes and detecting the water leakage generation position from the elevated water leakage occurrence position detecting device can be obtained close to the place.
【００１１】本発明によればまた、遮水シートを敷設し
て造成された管理型終末処理場において、処理場内で前
記遮水シートの上側に所定の間隔で埋設された複数の第
１の電極と、前記遮水シートの外側に埋設された第２の
電極と、交流電源と、電位差を測定するための電位差測
定回路と、前記複数の第１の電極のうち互いに隣接し合
う連続した３つの電極を順次選択して、選択された３つ
の電極のうち中心電極と前記第２の電極との間に前記交
流電源による通電を行うと共に、前記中心電極の両側の
電極を前記電位差測定回路に接続するための第１の電極
切換器と、前記電位差測定回路により測定された前記中
心電極の両側の電極の電位差出力を受け、前記交流電圧
の位相を基準として位相検波を行う位相検波回路とを備
えることにより、遮水シートの破損箇所付近の前記第１
の電極が選択されている時に前記位相検波回路の出力の
極性が反転することから遮水シートの破損箇所を検出す
ることを特徴とする漏水発生位置検出装置が得られる。Further, according to the present invention, in a management type final treatment plant constructed by laying a water-blocking sheet, a plurality of first electrodes embedded at a predetermined interval above the water-blocking sheet in the treatment plant. A second electrode buried outside the water-blocking sheet, an alternating current power supply, a potential difference measuring circuit for measuring a potential difference, and three consecutive first electrodes adjacent to each other among the plurality of first electrodes. The electrodes are sequentially selected, the center electrode and the second electrode of the three selected electrodes are energized by the AC power source, and the electrodes on both sides of the center electrode are connected to the potential difference measurement circuit. And a phase detection circuit that receives the potential difference output of the electrodes on both sides of the center electrode measured by the potential difference measurement circuit and performs phase detection with the phase of the AC voltage as a reference. By The near breach of water sheet first
Since the polarity of the output of the phase detection circuit is reversed when the electrode of 1 is selected, a water leakage generation position detection device is obtained which detects a damaged portion of the water shield sheet.
【００１２】本発明によれば更に、遮水シートを敷設し
て造成された管理型終末処理場において、処理場内で前
記遮水シートの上側に所定の間隔で埋設された複数の第
１の電極と、前記遮水シートの外側に埋設された第２の
電極と、交流電源と、電位差を測定するための第１、第
２の電位差測定回路と、前記複数の第１の電極のうち、
１つの電極を中心電極として２方向に関して互いに隣接
し合う５つの電極を順次選択し、選択された５つの電極
のうち前記中心電極と前記第２の電極との間に前記交流
電源による通電を行うと共に、前記２方向のうち一方の
方向について前記中心電極の両側となる２つの第１の電
極を前記第１の電位差測定回路に接続し、かつ前記２方
向のうち他方の方向について前記中心電極の両側となる
２つの第１の電極を前記第２の電位差測定回路に接続す
るための第１の電極切換器と、前記第１の電位差測定回
路により測定された前記中心電極の両側の電極の電位差
出力を受け、前記交流電圧の位相を基準として位相検波
を行う第１の位相検波回路と、前記第２の電位差測定回
路により測定された前記中心電極の両側の電極の電位差
出力を受け、前記交流電圧の位相を基準として位相検波
を行う第２の位相検波回路とを備えることにより、遮水
シートの破損箇所付近で前記第１、第２の位相検波出力
で得られる二方向座標の極性が反転することから遮水シ
ートの破損箇所を検出することを特徴とする漏水発生位
置検出装置が得られる。Further, according to the present invention, in a management type final treatment plant constructed by laying a water-blocking sheet, a plurality of first electrodes embedded at predetermined intervals above the water-blocking sheet in the treatment plant. And a second electrode buried outside the water-blocking sheet, an AC power supply, first and second potential difference measuring circuits for measuring a potential difference, and among the plurality of first electrodes,
Five electrodes which are adjacent to each other in two directions are sequentially selected with one electrode as a center electrode, and the center electrode and the second electrode of the selected five electrodes are energized by the AC power supply. At the same time, the two first electrodes on both sides of the center electrode in one of the two directions are connected to the first potential difference measuring circuit, and the center electrode is connected in the other direction of the two directions. A first electrode switch for connecting two first electrodes on both sides to the second potential difference measuring circuit, and a potential difference between the electrodes on both sides of the center electrode measured by the first potential difference measuring circuit. A first phase detection circuit that receives an output and performs phase detection with the phase of the AC voltage as a reference; and a potential difference output of the electrodes on both sides of the center electrode measured by the second potential difference measurement circuit, By providing a second phase detection circuit that performs phase detection using the phase of the flowing voltage as a reference, the polarities of the bidirectional coordinates obtained by the first and second phase detection outputs near the damaged portion of the water shield sheet. A water leakage generation position detection device characterized by detecting a damaged portion of the water-blocking sheet by reversing is obtained.
【００１３】なお、いずれの発明においても、前記複数
の第１の電極の１つと前記第２の電極との間を直接また
は可変抵抗を介して接続するための第２の電極切換器を
備え、該第２の電極切換器により選択された第１の電極
と前記第２の電極間を接続することで、前記選択された
第１の電極に対応する箇所に前記遮水シートのみかけ上
の破損を生じせしめることができる。In any of the inventions, a second electrode switching device for connecting one of the plurality of first electrodes and the second electrode directly or via a variable resistor is provided, By connecting between the first electrode selected by the second electrode switch and the second electrode, the apparent breakage of the water-blocking sheet at a location corresponding to the selected first electrode. Can be caused.
【００１４】[0014]
【作用】本発明の漏水発生位置検出装置では、処理場内
部の各点に配置された複数の第１の電極の選択された一
つの電極と処理場外部に配置された第２の電極との間に
電圧を印加し、これらの電極間を流れる電流をすべての
第１の電極について測定することにより、遮水シートの
破損箇所における電極間電流の上昇から遮水シートの破
損位置を検出することができる。In the water leakage generation position detecting device of the present invention, the selected one electrode of the plurality of first electrodes arranged at each point inside the treatment plant and the second electrode arranged outside the treatment plant are arranged. By applying a voltage between them and measuring the current flowing between these electrodes for all the first electrodes, it is possible to detect the damaged position of the impermeable sheet from the rise of the inter-electrode current at the damaged part of the impermeable sheet. You can
【００１５】また、本発明では処理場内部の各点に配置
された複数の第１の電極の選択された３個の電極のうち
の中心電極と処理場外部に配置された第２の電極間に電
圧を印加し、中心電極の両側の第１の電極間の電位差を
一定方向の連続した電極に対して測定することにより、
遮水シートの破損による電位差極性の反転箇所から遮水
シートの破損箇所を検出することができる。Further, in the present invention, between the center electrode of the three selected electrodes of the plurality of first electrodes arranged at each point inside the treatment field and the second electrode arranged outside the treatment field. By applying a voltage to the first electrode and measuring the potential difference between the first electrodes on both sides of the center electrode with respect to the continuous electrodes in a certain direction,
It is possible to detect the damaged part of the water-blocking sheet from the part where the potential difference polarity is reversed due to the damage of the water-blocking sheet.
【００１６】更に、本発明では処理場内部の各点に配置
された複数の第１の電極の選択された５個の電極のうち
の中心電極と処理場外部に配置された第２の電極間に電
圧を印加し、中心電極に関して点対象となる両側電極間
の電位差を一定方向の連続した電極に対して測定するこ
とにより、遮水シートの破損による電位差極性の反転箇
所から遮水シートの破損箇所を検出することができる。
この方法では点対象の電極配置がＸ軸方向、Ｙ軸方向の
みならずＸ軸方向、Ｙ軸方向に対して４５度傾斜した２
方向も設定することができるため、二通りの２次元座標
系の測定結果が得られることから、測定精度を高めるこ
とが可能となる。Further, according to the present invention, between the central electrode of the selected five electrodes of the plurality of first electrodes arranged at each point inside the treatment field and the second electrode arranged outside the treatment field. By applying a voltage to the center electrode and measuring the potential difference between the electrodes on both sides, which is the target of the center electrode, for consecutive electrodes in a certain direction, the water shield sheet is damaged from the point where the potential difference polarity is reversed due to damage to the water shield sheet. The location can be detected.
In this method, the electrode arrangement of the point object is tilted 45 degrees with respect to the X-axis direction and the Y-axis direction as well as the X-axis direction and the Y-axis direction.
Since the direction can also be set, two types of measurement results of the two-dimensional coordinate system can be obtained, so that the measurement accuracy can be improved.
【００１７】加えて、本発明では処理場内部の各点に配
置された複数の第１の電極の一つを選択して処理場外部
に配置した第２の電極と直接または抵抗を介して接続す
ることにより、みかけ上の破損箇所をつくって選択され
た電極を含まない測線上測定を行うことにより、処理場
内部の各部において異なる土中の電気伝導度の不均一性
等の影響を判断する上で重要な情報を得ることができ
る。In addition, according to the present invention, one of the plurality of first electrodes arranged at each point inside the treatment plant is selected and connected to the second electrode arranged outside the treatment plant directly or through a resistor. By making an apparent damage point and measuring on a survey line that does not include the selected electrode, it is possible to judge the influence of non-uniformity of electrical conductivity in different soils at each part inside the treatment plant. You can get important information above.
【００１８】[0018]
【実施例】次に実施例を挙げ、本発明の漏水発生位置検
出装置について、図面を参照して説明する。図１は本発
明による第１の実施例の構成を示す図である。処理場１
０内部に格子状に等間隔をおいて埋設された複数の電極
１１（第１の電極）を電極切換器１２（第１の電極切換
器）によりあらかじめ決められた順序で順次１つづつ選
択して所定時間交流電源１４に接続し、選択された電極
１１と処理場１０外部に埋設された電極１３（第２の電
極）との間に交流電源１４から電圧を印加する。そし
て、電極１３を通した電流検出回路１５により選択され
た電極１１と電極１３間を流れる電流を検出し、検出さ
れた電流に対して位相検波回路１６において印加電圧と
同じ位相で位相検波を行うことにより、遮水シート１７
に流れる電流成分を抽出する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The water leak occurrence position detecting device of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a diagram showing the configuration of a first embodiment according to the present invention. Treatment plant 1
A plurality of electrodes 11 (first electrodes) embedded in the interior of the grid 0 at regular intervals are sequentially selected one by one in a predetermined order by the electrode switching device 12 (first electrode switching device). Then, a voltage is applied from the AC power supply 14 between the selected electrode 11 and the electrode 13 (second electrode) embedded outside the processing site 10 for a predetermined time. Then, a current flowing between the electrode 11 and the electrode 13 selected by the current detection circuit 15 passing through the electrode 13 is detected, and the detected current is subjected to phase detection in the phase detection circuit 16 at the same phase as the applied voltage. By doing so, the impermeable sheet 17
The current component flowing in is extracted.
【００１９】遮水シート１７に破損箇所１８が発生した
時に処理場１０内外の電極１１と電極１３間を流れる電
流は、遮水シート１７の静電容量成分を通して流れる電
流成分と遮水シート１７の破損箇所１８を流れる電流と
の合成電流となる。しかし、それぞれの電流は位相が９
０度ずれているので、位相検波を行うことにより印加電
圧と同じ成分のみを分離して抽出することが可能とな
る。また、印加電圧の位相と９０度異なる位相で位相検
波を行えば、遮水シート１７の静電容量成分を通して流
れる電流成分を検出することも可能となる。The current flowing between the electrode 11 and the electrode 13 inside and outside the treatment plant 10 when the breakage point 18 occurs in the water-blocking sheet 17 is the current component flowing through the capacitance component of the water-blocking sheet 17 and the water-blocking sheet 17. It is a combined current with the current flowing through the damaged portion 18. However, each current has a phase of 9
Since they are deviated by 0 degree, it becomes possible to separate and extract only the same component as the applied voltage by performing the phase detection. In addition, if phase detection is performed at a phase that is 90 degrees different from the phase of the applied voltage, it is possible to detect the current component that flows through the electrostatic capacitance component of the water shield sheet 17.
【００２０】図２は図１に示された実施例の検出装置に
よって測定された結果の一例を示す図である。図２にお
いて、電極切換器１２により遮水シート１７の破損箇所
に近い位置に設置された電極１１が選択された際に、印
加電圧と同じ位相の電流成分が上昇し、遮水シート１７
の破損箇所から離れるにしたがって減少する傾向を示し
ている。FIG. 2 is a diagram showing an example of a result measured by the detection apparatus of the embodiment shown in FIG. In FIG. 2, when the electrode selector 12 selects the electrode 11 installed at a position close to the damaged portion of the waterproof sheet 17, the current component in the same phase as the applied voltage rises, and the waterproof sheet 17
Shows a tendency to decrease with increasing distance from the damaged part.
【００２１】図３は本発明による第２の実施例を示す図
である。電極切換器３２は、１回の切換え動作において
処理場１０内部に埋設された複数の電極１１のうちの隣
接し合う３個の電極１１−０、１１−１、１１−２を選
択する。特に、選択された３個の電極１１−０〜１１−
２のうち、中心となる電極１１−０（以下、中心電極と
呼ぶ）と処理場１０外部に埋設された電極１３との間に
交流電源１４からの電圧を所定時間印加するように接続
し、中心電極１１−０の両側の電極１１−１，１１−２
は電位差測定回路３３に所定時間接続するようにして電
極１１−１と１１−２との間の電位差を測定する。そし
て、電位差測定回路３３の出力を位相検波回路３４にお
いて印加電圧と同じ位相で位相検波することにより、遮
水シート１７の破損箇所を検出するようにしている。FIG. 3 is a diagram showing a second embodiment according to the present invention. The electrode switch 32 selects three adjacent electrodes 11-0, 11-1, 11-2 of the plurality of electrodes 11 embedded in the processing plant 10 in one switching operation. In particular, the selected three electrodes 11-0 to 11-
Of the two, the central electrode 11-0 (hereinafter referred to as the central electrode) and the electrode 13 embedded outside the processing site 10 are connected so that a voltage from the AC power supply 14 is applied for a predetermined time, Electrodes 11-1 and 11-2 on both sides of the center electrode 11-0
Is connected to the potential difference measuring circuit 33 for a predetermined time and measures the potential difference between the electrodes 11-1 and 11-2. Then, the output of the potential difference measurement circuit 33 is phase-detected in the phase detection circuit 34 at the same phase as the applied voltage, so that the damaged portion of the water-blocking sheet 17 is detected.
【００２２】図４は図３に示された処理場１０の断面と
電極１１の１次元配置を示すもので、この図を用いて図
３に示された実施例の検出原理を説明する。処理場１０
底部に配置された複数の電極１１のある電極が交流電源
１４から通電されるべき中心電極（あるいは通電電極）
１１−０として選択された場合、その中心電極１１−０
の両側の電極１１−１，１１−２が電位検出電極として
選択される。中心電極１１−０から流れる電流は周辺部
へ向かって流れるが、遮水シート１７に破損が有る方向
の電流成分ｉ1 は、破損が無い方向の電流成分ｉ2 に比
べて多く流れる。従って、中心電極１１−０の電位をＶ
0 とすれば、電位検出のための電極１１−１，１１−２
の電位Ｖ1 ，Ｖ2 及び電位差は次式で示される。FIG. 4 shows the cross section of the treatment site 10 and the one-dimensional arrangement of the electrodes 11 shown in FIG. 3, and the detection principle of the embodiment shown in FIG. 3 will be described with reference to this figure. Treatment plant 10
A center electrode (or a current-carrying electrode) to which an electrode having a plurality of electrodes 11 arranged at the bottom should be energized from an AC power supply 14.
If selected as 11-0, its center electrode 11-0
The electrodes 11-1 and 11-2 on both sides of are selected as potential detection electrodes. The current flowing from the center electrode 11-0 flows toward the peripheral portion, but the current component i1 in the direction in which the water shield sheet 17 is damaged flows more than the current component i2 in the direction in which there is no damage. Therefore, the potential of the center electrode 11-0 is V
If 0, electrodes 11-1 and 11-2 for potential detection are used.
The potentials V1 and V2 and the potential difference of are expressed by the following equations.
【００２３】 電 位 Ｖ1 ＝Ｖ0 −Ｒｉ1 、Ｖ2 ＝Ｖ0 −Ｒｉ2 電位差 Ｖ2 −Ｖ1 ＝Ｒ（ｉ1 −ｉ2 ） 但し、Ｒは電流経路の抵抗値を表わすものとする。Potentials V1 = V0-Ri1, V2 = V0-Ri2 Potential difference V2-V1 = R (i1-i2) where R represents the resistance value of the current path.
【００２４】ここで、電極１１−１，１１−２の電流成
分に差が生じれば電位差の極性が変化することから、遮
水シート１７の破損箇所が検出される。Here, if a difference occurs between the current components of the electrodes 11-1 and 11-2, the polarity of the potential difference changes, so that the damaged portion of the water shield sheet 17 is detected.
【００２５】図５は処理場１０内部の平面的電極配置と
図３に示した方法で測定された２次元の電位差測定の結
果を示す図である。図５に示された電位差測定結果で
は、遮水シート１７の破損箇所１８において電位差の極
性反転が生じている。FIG. 5 is a diagram showing the planar electrode arrangement inside the treatment plant 10 and the result of the two-dimensional potential difference measurement measured by the method shown in FIG. In the potential difference measurement result shown in FIG. 5, the polarity reversal of the potential difference occurs at the damaged portion 18 of the water shield sheet 17.
【００２６】図６は第３の実施例を示し、図３に示した
検出装置における電極切換器３２に代えて電極切換器６
２を用い、この電極切換器６２により１回の切換え動作
で互いに隣接し合う５つの電極１１−０、１１−１、１
１−２、１１−３、１１−４、１１−５を選択するよう
にしている。特に、中心電極１１−０には交流電源１４
を接続し、中心電極１１−０を間にした２方向のうち１
方向（Ｘ方向）の両側の電極１１−１、１１−２は電位
差測定回路３３−１に、他方向（Ｙ方向）の両側の電極
１１−３、１１−４は電位差測定回路３３−２にそれぞ
れ接続するようにしている。この装置では、２系統の電
位差測定回路３３−１，３３−２と、これらのそれぞれ
に対応した位相検波回路３４−１，３４−２を設けるこ
とにより、Ｘ方向，Ｙ方向の２次元の電位差成分を同時
に測定できる構成となっている。FIG. 6 shows a third embodiment, in which the electrode switching device 6 is replaced with the electrode switching device 32 in the detecting device shown in FIG.
5, two electrodes 11-0, 11-1, 1 which are adjacent to each other by one switching operation by this electrode switch 62 are used.
1-2, 11-3, 11-4, 11-5 are selected. In particular, an AC power supply 14 is connected to the center electrode 11-0.
1 of the two directions with the center electrode 11-0 in between.
The electrodes 11-1 and 11-2 on both sides in the direction (X direction) are connected to the potential difference measuring circuit 33-1 and the electrodes 11-3 and 11-4 on both sides in the other direction (Y direction) are connected to the potential difference measuring circuit 33-2. I am trying to connect each. In this apparatus, by providing two systems of potential difference measuring circuits 33-1 and 33-2 and phase detection circuits 34-1 and 34-2 corresponding to these circuits, respectively, a two-dimensional potential difference in the X direction and the Y direction is obtained. The composition is such that the components can be measured simultaneously.
【００２７】図７は第４の実施例を示し、電極切換器７
１（第２の電極切換器）を用いることにより測線に含ま
れない最外側の電極１１を利用して疑似的に遮水シート
１７に破損を生じさせる原理を説明するための図であ
る。この例では、前述したように、電極切換器３２によ
り３つの電極１１−０〜１１−２を選択して中心電極１
１−０には交流電源１４を、両側の電極１１−１、１１
−２には電位差測定回路３３をそれぞれ接続する。一
方、実際の漏水検出動作の前に電極切換器７１により中
心電極１１−０に最も近い測線近傍の電極１１−３を直
接（スイッチ７１−１を閉とする）、または可変抵抗Ｒ
V を介して（スイッチ７１−１を開とする）処理場１０
外部に配置した電極１３に接続することで、これらの間
に短絡状態をつくり、みかけ上電極１１−３に対応する
位置の遮水シート１７に破損を生じたのと同じ効果を生
じさせることが可能となる。これは、電極１１−３と電
極１３とが接続されると、中心電極１１−０と電極１１
−３との間に遮水シート１７の介在しない状態がつくら
れるからである。電極切換器７１の切換器７１−２は測
線近傍の電極を選択するためのものである。FIG. 7 shows a fourth embodiment, in which the electrode switching device 7
It is a figure for demonstrating the principle which causes damage to the impermeable sheet 17 artificially by using the outermost electrode 11 which is not included in a survey line by using 1 (2nd electrode changer). In this example, as described above, the three electrodes 11-0 to 11-2 are selected by the electrode switch 32 to select the center electrode 1.
An AC power supply 14 is connected to 1-0, and electrodes 11-1 and 11 on both sides are provided.
The potential difference measuring circuit 33 is connected to -2. On the other hand, before the actual water leakage detection operation, the electrode switch 71 directly causes the electrode 11-3 in the vicinity of the measurement line closest to the center electrode 11-0 (the switch 71-1 to be closed) or the variable resistor R to be closed.
Processing plant 10 via V (switch 71-1 is opened)
By connecting to the electrode 13 arranged externally, a short-circuit state can be created between them, and the same effect as that in which the impermeable sheet 17 at the position corresponding to the apparent electrode 11-3 is damaged can be produced. It will be possible. This means that when the electrode 11-3 and the electrode 13 are connected, the center electrode 11-0 and the electrode 11
This is because a state in which the water-blocking sheet 17 is not present is created between the sheet and -3. The switch 71-2 of the electrode switch 71 is for selecting an electrode near the survey line.
【００２８】このような機能を用いることで、処理場１
０内部の電気伝導度の違いによる検出特性を検討するだ
けでなく、あらかじめ土中の状態に応じた電気伝導度、
すなわち抵抗値を把握しておくことにより、選択された
測線近傍の電極１１−３と接続される可変抵抗ＲV の値
を設定することにより破損の面積を類推することも可能
となる。勿論、このような電極切換器７１は、図１、図
３、後述する図８の実施例に組み合わせても良い。By using such a function, the processing plant 1
0 In addition to studying the detection characteristics due to the difference in the electrical conductivity of the inside, the electrical conductivity according to the state of the soil in advance,
That is, by knowing the resistance value, it is possible to estimate the area of damage by setting the value of the variable resistance R V connected to the electrode 11-3 near the selected survey line. Of course, such an electrode switch 71 may be combined with the embodiment of FIGS. 1 and 3 and FIG. 8 described later.
【００２９】図８は電位差測定回路３３に接続される電
極１１−１，１１−２の配列を図３の例とは４５度ずら
して測定する例を示す図である。この測定方式では、図
５に示した測定方向とは異なる測線のデータが得られる
ことから、測定精度を向上させることが可能となる。FIG. 8 is a diagram showing an example in which the arrangement of the electrodes 11-1 and 11-2 connected to the potential difference measuring circuit 33 is shifted by 45 degrees from the example in FIG. 3 for measurement. In this measuring method, since the data of the measuring line different from the measuring direction shown in FIG. 5 is obtained, the measuring accuracy can be improved.
【００３０】[0030]
【発明の効果】以上の説明で明らかなように、本発明に
よれば、管理型終末処理場の遮水シートの上側に複数の
電極を埋設し、この複数の電極からいずれか１つを順に
選択して選択された電極と処理場外部に埋設された電極
との間に電圧を印加してこれらの電極間に流れる電流の
中から印加電圧に同期した電流成分を測定し、電流成分
の上昇から遮水シートの破損箇所を検出することができ
る。As is apparent from the above description, according to the present invention, a plurality of electrodes are embedded on the upper side of the water-blocking sheet of the control type final disposal plant, and any one of these electrodes is sequentially arranged. A voltage is applied between the selected electrode and the electrode buried outside the treatment site, and the current component synchronized with the applied voltage is measured from the current flowing between these electrodes, and the current component rises. It is possible to detect the damaged part of the waterproof sheet.
【００３１】また、電圧を印加された電極の両側の電極
の電位から差分を求め、この差分に対して位相検波を行
い、極性の反転から遮水シートの破損箇所を検出するこ
とができる。Further, the difference can be obtained from the potentials of the electrodes on both sides of the electrode to which the voltage is applied, the phase detection can be performed on this difference, and the damaged portion of the water shield sheet can be detected from the reversal of the polarity.
【００３２】更に、電圧を印加された電極の近傍の電極
を可変抵抗を介してまたは直接、処理場外部の電極に接
続することにより、装置の破損検出特性の検査や処理場
内部各部の電気伝導度による変動を判定し、破損の大き
さを推定することができる。Further, by connecting an electrode in the vicinity of the electrode to which a voltage is applied to the electrode outside the treatment plant via a variable resistor or directly, the inspection of the damage detection characteristic of the apparatus and the electric conduction of each part inside the treatment plant. The degree of damage can be estimated by determining the variation with time.
【００３３】以上のような機能により、遮水シートの破
損を早期に発見して補修することで地下水汚染や環境破
壊を防止することができるなど得られる効果は大であ
る。With the above-described functions, it is possible to prevent groundwater pollution and environmental damage by finding and repairing breakage of the water-blocking sheet at an early stage.
【図１】本発明の第１の実施例を示す図である。FIG. 1 is a diagram showing a first embodiment of the present invention.
【図２】図１に示した実施例の測定結果の一例を示す図
である。FIG. 2 is a diagram showing an example of measurement results of the example shown in FIG.
【図３】本発明の第２の実施例を示す図である。FIG. 3 is a diagram showing a second embodiment of the present invention.
【図４】図３に示した本発明の検出原理を説明するため
の図である。FIG. 4 is a diagram for explaining the detection principle of the present invention shown in FIG.
【図５】図３に示した実施例の測定結果の一例を示す図
である。5 is a diagram showing an example of measurement results of the example shown in FIG.
【図６】本発明の第３の実施例を示す図である。FIG. 6 is a diagram showing a third embodiment of the present invention.
【図７】本発明の第４の実施例を示す図である。FIG. 7 is a diagram showing a fourth embodiment of the present invention.
【図８】図６に示した実施例の変形例の測定結果の一例
を示す図である。8 is a diagram showing an example of measurement results of a modification of the embodiment shown in FIG.
【図９】従来例を説明するための図である。FIG. 9 is a diagram for explaining a conventional example.
【図１０】従来例の測定結果の一例を示す図である。FIG. 10 is a diagram showing an example of measurement results of a conventional example.
１０ 処分場 １１、１３ 電極 １７ 遮水シート ３２、６２、７１ 電極切換器 ７１−２ 切換器 10 Disposal sites 11, 13 Electrodes 17 Water-blocking sheets 32, 62, 71 Electrode changer 71-2 Changer
───────────────────────────────────────────────────── フロントページの続き (72)発明者 荒井 健 埼玉県志木市館２丁目３番５号507 ────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Ken Arai 2-3-5 No. 507, Shiki-shi, Saitama 507
Claims (6)
終末処理場において、 処理場内で前記遮水シートの上側に所定の間隔で埋設さ
れた複数の第１の電極と、 前記遮水シートの外側に埋設された第２の電極と、 交流電源と、 前記複数の第１の電極から１つを順に選択し、選択され
た第１の電極と前記第２の電極との間に前記交流電源の
交流電圧を順に印加するための第１の電極切換器と、 前記選択された第１の電極と前記第２の電極との間に流
れる電流を検出する電流検出回路と、 この電流検出回路の出力と前記交流電源の出力を受けて
該交流電圧の位相を基準として前記電流検出回路の出力
信号の位相検波を行う位相検波回路とを備え、 前記第１の電極切換器により前記第１の電極を順次選択
して前記選択された第１の電極と前記第２の電極間の電
流の位相検波を行うことにより、遮水シートの破損によ
る漏水発生箇所に近い電極の組合せになった際に電極間
を流れる電流が他の電極間の値よりも上昇することから
漏水発生位置を検出することを特徴とする漏水発生位置
検出装置。1. A management-type terminal treatment plant constructed by laying a water-blocking sheet, wherein a plurality of first electrodes embedded at a predetermined interval above the water-blocking sheet in the treatment plant, and the water-blocking sheet. A second electrode embedded on the outside of the sheet; an alternating current power source; and one of the plurality of first electrodes in order, and between the selected first electrode and the second electrode, A first electrode switching device for sequentially applying an AC voltage of an AC power supply, a current detection circuit for detecting a current flowing between the selected first electrode and the second electrode, and this current detection A phase detection circuit that receives the output of the circuit and the output of the AC power supply and performs phase detection of the output signal of the current detection circuit with the phase of the AC voltage as a reference; Electrodes are sequentially selected to select the first electrode and the selected first electrode. By performing the phase detection of the current between the electrodes, the current flowing between the electrodes rises more than the value between the other electrodes when the combination of the electrodes is close to the location where the water leakage occurs due to the breakage of the waterproof sheet. A water leak occurrence position detection device, which detects a water leak occurrence position.
おいて、 前記複数の第１の電極の１つと前記第２の電極との間を
直接または可変抵抗を介して接続するための第２の電極
切換器を備え、 該第２の電極切換器により選択された第１の電極と前記
第２の電極間を接続することで、前記選択された第１の
電極に対応する箇所に前記遮水シートのみかけ上の破損
を生じせしめることができるようにしたことを特徴とす
る漏水発生位置検出装置。2. The water leakage generation position detection device according to claim 1, wherein a second one for connecting one of the plurality of first electrodes and the second electrode directly or via a variable resistor. An electrode switching device is provided, and by connecting between the first electrode selected by the second electrode switching device and the second electrode, the water shield is provided at a location corresponding to the selected first electrode. A leak detecting position detecting device characterized in that the apparent damage of the seat can be caused.
終末処理場において、 処理場内で前記遮水シートの上側に所定の間隔で埋設さ
れた複数の第１の電極と、 前記遮水シートの外側に埋設された第２の電極と、 交流電源と、 電位差を測定するための電位差測定回路と、 前記複数の第１の電極のうち互いに隣接し合う連続した
３つの電極を順次選択して、選択された３つの電極のう
ち中心電極と前記第２の電極との間に前記交流電源によ
る通電を行うと共に、前記中心電極の両側の電極を前記
電位差測定回路に接続するための第１の電極切換器と、 前記電位差測定回路により測定された前記中心電極の両
側の電極の電位差出力を受け、前記交流電圧の位相を基
準として位相検波を行う位相検波回路とを備えることに
より、 遮水シートの破損箇所付近の前記第１の電極が選択され
ている時に前記位相検波回路の出力の極性が反転するこ
とから遮水シートの破損箇所を検出することを特徴とす
る漏水発生位置検出装置。3. A management-type terminal treatment plant constructed by laying a water-blocking sheet, wherein a plurality of first electrodes buried at a predetermined interval above the water-blocking sheet in the treatment plant, and the water-blocking sheet. A second electrode embedded on the outside of the sheet, an AC power source, a potential difference measuring circuit for measuring the potential difference, and three consecutive electrodes adjacent to each other among the plurality of first electrodes are sequentially selected. Of the three selected electrodes, a first electrode is connected between the center electrode and the second electrode by the AC power source, and electrodes on both sides of the center electrode are connected to the potential difference measuring circuit. And a phase detection circuit that receives a potential difference output of the electrodes on both sides of the center electrode measured by the potential difference measurement circuit and performs a phase detection with the phase of the AC voltage as a reference. Break the sheet Leak occurrence position detecting apparatus according to claim polarity of the output of the phase detection circuit to detect a breach of the water shield sheet from the inverting when the first electrode in the vicinity of locations is selected.
おいて、 前記複数の第１の電極の１つと前記第２の電極との間を
直接または可変抵抗を介して接続するための第２の電極
切換器を備え、 該第２の電極切換器により選択された第１の電極と前記
第２の電極間を接続することで、前記選択された第１の
電極に対応する箇所に前記遮水シートのみかけ上の破損
を生じせしめることができるようにしたことを特徴とす
る漏水発生位置検出装置。4. The water leakage generation position detecting device according to claim 3, wherein a second one for connecting one of the plurality of first electrodes and the second electrode directly or via a variable resistor. An electrode switching device is provided, and by connecting between the first electrode selected by the second electrode switching device and the second electrode, the water shield is provided at a location corresponding to the selected first electrode. A leak detecting position detecting device characterized in that the apparent damage of the seat can be caused.
終末処理場において、 処理場内で前記遮水シートの上側に所定の間隔で埋設さ
れた複数の第１の電極と、 前記遮水シートの外側に埋設された第２の電極と、 交流電源と、 電位差を測定するための第１、第２の電位差測定回路
と、 前記複数の第１の電極のうち、１つの電極を中心電極と
して２方向に関して互いに隣接し合う５つの電極を順次
選択し、選択された５つの電極のうち前記中心電極と前
記第２の電極との間に前記交流電源による通電を行うと
共に、前記２方向のうち一方の方向について前記中心電
極の両側となる２つの第１の電極を前記第１の電位差測
定回路に接続し、かつ前記２方向のうち他方の方向につ
いて前記中心電極の両側となる２つの第１の電極を前記
第２の電位差測定回路に接続するための第１の電極切換
器と、 前記第１の電位差測定回路により測定された前記中心電
極の両側の電極の電位差出力を受け、前記交流電圧の位
相を基準として位相検波を行う第１の位相検波回路と、 前記第２の電位差測定回路により測定された前記中心電
極の両側の電極の電位差出力を受け、前記交流電圧の位
相を基準として位相検波を行う第２の位相検波回路とを
備えることにより、 遮水シートの破損箇所付近で前記第１、第２の位相検波
出力で得られる二方向座標の極性が反転することから遮
水シートの破損箇所を検出することを特徴とする漏水発
生位置検出装置。5. A management-type terminal treatment plant constructed by laying a water-blocking sheet, wherein a plurality of first electrodes embedded at a predetermined interval above the water-blocking sheet in the treatment plant, and the water-blocking sheet. A second electrode embedded outside the sheet, an AC power supply, first and second potential difference measuring circuits for measuring a potential difference, and one electrode among the plurality of first electrodes is a center electrode As a result, five electrodes adjacent to each other in two directions are sequentially selected, and the central electrode and the second electrode among the selected five electrodes are energized by the AC power source, and the two electrodes in the two directions are selected. Two first electrodes on both sides of the center electrode in one direction are connected to the first potential difference measuring circuit, and two first electrodes on both sides of the center electrode in the other direction of the two directions. 1 electrode to the second potential A first electrode switch for connecting to a measurement circuit, and a potential difference output of the electrodes on both sides of the center electrode measured by the first potential difference measurement circuit, and phase detection using the phase of the AC voltage as a reference. A second phase detection circuit that receives a potential difference output between the electrodes on both sides of the center electrode measured by the first phase detection circuit and the second potential difference measurement circuit that performs phase detection with the phase of the AC voltage as a reference. By including a circuit, since the polarities of the bidirectional coordinates obtained by the first and second phase detection outputs are inverted in the vicinity of the damaged portion of the waterproof sheet, the damaged location of the waterproof sheet is detected. A leak detection position detection device.
おいて、 前記複数の第１の電極の１つと前記第２の電極との間を
直接または可変抵抗を介して接続するための第２の電極
切換器を備え、 該第２の電極切換器により選択された第１の電極と前記
第２の電極間を接続することで、前記選択された第１の
電極に対応する箇所に前記遮水シートのみかけ上の破損
を生じせしめることができるようにしたことを特徴とす
る漏水発生位置検出装置。6. The water leakage generation position detection device according to claim 5, wherein a second one for connecting one of the plurality of first electrodes and the second electrode directly or via a variable resistor. An electrode switching device is provided, and by connecting between the first electrode selected by the second electrode switching device and the second electrode, the water shield is provided at a location corresponding to the selected first electrode. A leak detecting position detecting device characterized in that the apparent damage of the seat can be caused.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7159607A JPH0915080A (en) | 1995-06-26 | 1995-06-26 | Water leak position detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7159607A JPH0915080A (en) | 1995-06-26 | 1995-06-26 | Water leak position detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0915080A true JPH0915080A (en) | 1997-01-17 |
Family
ID=15697412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7159607A Pending JPH0915080A (en) | 1995-06-26 | 1995-06-26 | Water leak position detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0915080A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003075283A (en) * | 2001-09-04 | 2003-03-12 | Nishimatsu Constr Co Ltd | System and method for detecting water leakage |
| KR100467835B1 (en) * | 2001-05-09 | 2005-01-24 | 한국건설기술연구원 | Grid-net contraminant leakage detection system of using method of measuring electrical resistance and measuring method thereof |
| JP2011257283A (en) * | 2010-06-10 | 2011-12-22 | Jfe Steel Corp | Method and device for measuring position of current-carrying part |
-
1995
- 1995-06-26 JP JP7159607A patent/JPH0915080A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100467835B1 (en) * | 2001-05-09 | 2005-01-24 | 한국건설기술연구원 | Grid-net contraminant leakage detection system of using method of measuring electrical resistance and measuring method thereof |
| JP2003075283A (en) * | 2001-09-04 | 2003-03-12 | Nishimatsu Constr Co Ltd | System and method for detecting water leakage |
| JP2011257283A (en) * | 2010-06-10 | 2011-12-22 | Jfe Steel Corp | Method and device for measuring position of current-carrying part |
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