TWI403710B - Liquid leakage sensor - Google Patents
Liquid leakage sensor Download PDFInfo
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- TWI403710B TWI403710B TW95104393A TW95104393A TWI403710B TW I403710 B TWI403710 B TW I403710B TW 95104393 A TW95104393 A TW 95104393A TW 95104393 A TW95104393 A TW 95104393A TW I403710 B TWI403710 B TW I403710B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
- G01M3/165—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means by means of cables or similar elongated devices, e.g. tapes
Abstract
Description
本發明係關於用於一洩漏偵測系統之一液體洩漏感測器。The present invention relates to a liquid leakage sensor for use in a leak detection system.
作為預防居民區、醫院、倉庫等內之災難之措施中之一，提供各種洩漏偵測系統，其能即時感測一意外洩漏與浸水之發生以使得可迅速將該意外通知居民及門衛。一般而言，該洩漏偵測系統包括：一用於藉由使用諸如電、聲或光之媒介來感測液體存在之液體洩漏感測器；及一用於執行一通報作用之洩漏偵測器，諸如根據由液體洩漏感測器感測之偵測液體之訊號之一警報發生器。在此狀況下，電類型液體洩漏感測器藉由經配置成彼此獨立之一對電極之間之被動電傳導來感測水的存在(洩漏或浸水)。在電類型液體洩漏感測器中，洩漏偵測器將該液體洩漏感測器本身之電阻(其對應於電極之間的液體存在量上的增加及減少而改變)作為一液體感測訊號而偵測並處理。因此，在其中倂入電類型洩漏水感測器之洩漏水偵測系統中，前提為待感測之液體係導電的。As one of the measures to prevent disasters in residential areas, hospitals, warehouses, etc., various leak detection systems are provided, which can instantly sense the occurrence of an accidental leak and flooding so that the accident can be quickly notified to residents and guards. In general, the leak detection system includes: a liquid leakage sensor for sensing the presence of a liquid by using a medium such as electricity, sound or light; and a leak detector for performing a notification function An alarm generator such as one of the signals based on the detected liquid sensed by the liquid leakage sensor. In this case, the electrical type liquid leakage sensor senses the presence of water (leakage or water immersion) by passive electrical conduction between the pair of electrodes configured to be independent of one another. In an electrical type liquid leakage sensor, the leak detector acts as a liquid sensing signal by changing the resistance of the liquid leakage sensor itself (which corresponds to an increase and decrease in the amount of liquid present between the electrodes). Detect and process. Therefore, in the leak water detecting system in which the electric type leakage water sensor is incorporated, the premise is that the liquid system to be sensed is electrically conductive.
洩漏偵測系統中之電類型液體洩漏感測器之液體感測能力(敏感度)主要係由電極之構造決定的。習知地，一液體洩漏感測器，其敏感度對應於洩漏偵測系統之應用(置放洩漏偵測系統之環境、待感測之目標液體等)，已經適當選擇而使用。舉例而言，一高敏感度類型液體洩漏感測器用來偵測諸如純淨水之液體(其電阻相對較高)之洩漏，且一低敏感度類型液體洩漏感測器用來偵測諸如城鎮用水之液體(其電阻相對較低)之洩漏。The liquid sensing capability (sensitivity) of the electrical type liquid leakage sensor in the leak detection system is primarily determined by the configuration of the electrodes. Conventionally, a liquid leakage sensor whose sensitivity corresponds to the application of the leak detection system (the environment in which the leak detection system is placed, the target liquid to be sensed, etc.) has been appropriately selected and used. For example, a high sensitivity type liquid leak sensor is used to detect leaks of liquids such as pure water (which have relatively high resistance), and a low sensitivity type liquid leak sensor is used to detect water such as towns. Leakage of liquids (which have relatively low resistance).
本發明之一目的係提供用於一洩漏偵測系統之電類型高敏感度液體洩漏感測器，其特徵在於可防止由一非常小量之液體而非水洩漏或浸水而引起之錯誤操作之發生且另外可在恢復時易於移除該液體。It is an object of the present invention to provide an electrical type high sensitivity liquid leakage sensor for a leak detection system characterized by preventing erroneous operation caused by a very small amount of liquid rather than water leakage or water immersion. Occurs and additionally the liquid can be easily removed upon recovery.
為實現上述目的，本發明之實施例(例如)有利地提供一液體洩漏感測器，其包括複數個彼此相隔之電極且感測某些電極之間的電傳導作為液體之存在，該液體洩漏感測器包括一具有一電絕緣特性之線性核心構件；及個別地以一螺旋樣式位於核心構件之一表面上且在該表面上經配置成彼此相隔之複數個導線，該等導線分別充當電極。In order to achieve the above object, embodiments of the present invention advantageously provide, for example, a liquid leakage sensor comprising a plurality of electrodes spaced apart from each other and sensing electrical conduction between certain electrodes as a liquid, the liquid leakage The sensor includes a linear core member having an electrically insulating property; and a plurality of wires individually disposed on a surface of the core member in a spiral pattern and configured to be spaced apart from each other on the surface, the wires acting as electrodes .
本發明之實施例(例如)亦有利地提供一液體洩漏感測器，其中該核心構件包括複數個凹槽，其個別地以一螺旋樣式沿表面下凹，複數個導線之每一者在每一凹槽中被固定容納。Embodiments of the present invention, for example, also advantageously provide a liquid leakage sensor, wherein the core member includes a plurality of grooves that are individually recessed along the surface in a spiral pattern, each of the plurality of wires being A groove is fixedly received.
本發明之實施例(例如)亦有利地提供一液體洩漏感測器，其中複數個導線包括一暴露的表面部分，其大體上在液體洩漏感測器之一預定感測區之整個長度上連續暴露於核心構件之表面上。Embodiments of the present invention, for example, also advantageously provide a liquid leakage sensor wherein the plurality of wires comprise an exposed surface portion that is substantially continuous throughout the length of a predetermined sensing region of one of the liquid leakage sensors Exposure to the surface of the core member.
本發明之實施例(例如)亦有利地提供一液體洩漏感測器，其中複數個導線大體上在該液體洩漏感測器之一預定感測區之整個長度上在核心構件之表面上等間隔分佈。Embodiments of the present invention, for example, also advantageously provide a liquid leakage sensor in which a plurality of wires are substantially equally spaced on the surface of the core member over substantially the entire length of one of the predetermined sensing regions of the liquid leakage sensor. distributed.
本發明之實施例(例如)亦有利地提供一液體洩漏感測器，其中該核心構件之表面大體上包含一圓柱表面。Embodiments of the invention, for example, also advantageously provide a liquid leakage sensor wherein the surface of the core member generally comprises a cylindrical surface.
本發明之實施例(例如)亦有利地提供一液體洩漏感測器，其進一步包含一具有一電絕緣特性及一液體滲透性之網狀構件，該網狀構件經配置以覆蓋該核心構件及複數個導線。Embodiments of the present invention, for example, also advantageously provide a liquid leakage sensor further comprising a mesh member having an electrical insulating property and a liquid permeability, the mesh member being configured to cover the core member and Multiple wires.
本發明之實施例(例如)亦有利地提供一液體洩漏感測器，其中該網狀構件包含複數個纖維構件，其個別地沿核心構件之表面而纏繞以環繞該等複數個導線。Embodiments of the invention, for example, also advantageously provide a liquid leakage sensor, wherein the mesh member includes a plurality of fiber members that are individually wrapped around the surface of the core member to surround the plurality of wires.
舉例而言，由於分別充當一電極之複數個導線以螺旋狀位於核心構件之一表面上，故此等導線在該核心構件上之最小間隔規定為在核心構件之大體圓周方向上之一距離。因此，當該核心構件之厚度為幾毫米時(其相對較薄)，此等導線之最小間隔可為幾毫米。因此，可獲得能感測一相對小量之液體之高敏感度類型液體洩漏感測器。另一方面，例如，在以下狀況下，即諸如露水(其非洩漏水或浸沒水)之非常小數之液體存在於一置放有液體洩漏感測器之表面上，用於感測液體之該等導線之間隔為在核心構件之縱向上之一距離，而不考慮核心構件之厚度。例如，當複數個導線經配置在核心構件之縱向上且彼此充分相隔，例如，則難以感測一置放有液體洩漏感測器之表面上所產生之非常小量之液體。因此，可獲得很少誤操作之液體洩漏感測器。當液體洩漏感測器在感測到洩漏水之後恢復成初始狀態時，附著至核心構件及導線之液體可易於且快速移除。For example, since a plurality of wires respectively serving as an electrode are spirally located on one surface of the core member, the minimum spacing of the wires on the core member is defined as a distance in a substantially circumferential direction of the core member. Thus, when the thickness of the core member is a few millimeters (which is relatively thin), the minimum spacing of such wires can be a few millimeters. Thus, a high sensitivity type liquid leakage sensor capable of sensing a relatively small amount of liquid can be obtained. On the other hand, for example, in the case where a very small amount of liquid such as dew (which is not leaking water or immersed water) is present on a surface on which a liquid leakage sensor is placed for sensing a liquid The spacing of the equal conductors is one of the distances in the longitudinal direction of the core member, regardless of the thickness of the core member. For example, when a plurality of wires are disposed in the longitudinal direction of the core member and are sufficiently spaced apart from each other, for example, it is difficult to sense a very small amount of liquid generated on the surface on which the liquid leakage sensor is placed. Therefore, a liquid leakage sensor with little misoperation can be obtained. When the liquid leakage sensor returns to the initial state after sensing the leaked water, the liquid attached to the core member and the wire can be easily and quickly removed.
同樣，例如，每一凹槽先前形成為螺旋狀，其對應於每一導線所需的使得該等導線可用作一電極之形狀。歸因於先前所述，該等複數個導線可易於沿著核心構件表面經配置成一預定螺旋線圈形態。Also, for example, each groove is previously formed in a spiral shape corresponding to each wire required such that the wires can be used as an electrode shape. Due to the foregoing, the plurality of wires can be easily configured into a predetermined helical coil configuration along the surface of the core member.
同樣，可感測洩漏水感測器之感測區中之任何處之液體之一局部存在。另外，使導線彼此橋接之液體附著於核心構件表面上，同時由於表面張力作用而自動沿導線擴展。因此，一電子流可易於在液體中流動。因此，即使在電阻相對較高之純淨水的狀況下，亦可明確感測到其存在。Also, one of the liquids anywhere in the sensing region of the leaking water sensor can be sensed to be locally present. In addition, the liquid bridging the wires to each other adheres to the surface of the core member while automatically expanding along the wires due to the surface tension. Therefore, a stream of electrons can easily flow in the liquid. Therefore, even in the case of pure water having a relatively high electric resistance, the presence thereof can be clearly sensed.
同樣，例如在液體洩漏感測器之感測區中可確保大體均勻之敏感度。在液體洩漏感測器中，當適當選擇配置複數個導線之一間隔時，易於調整該靈敏性。Also, for example, a substantially uniform sensitivity can be ensured in the sensing region of the liquid leakage sensor. In a liquid leakage sensor, the sensitivity is easily adjusted when a spacing of one of a plurality of wires is properly selected.
同樣，例如個別導線亦可易於且精確地以螺旋狀纏繞在核心構件表面上。Also, for example, individual wires can be easily and accurately wound in a spiral on the surface of the core member.
同樣，例如實際上液體洩漏感測器可直接置放於一導管之一導電表面上。Also, for example, a liquid leakage sensor can be placed directly on one of the conductive surfaces of a catheter.
同樣，例如亦可相對容易地獲得預定密度之網構件。Also, for example, a mesh member of a predetermined density can be obtained relatively easily.
參看隨附圖式，將在下文詳細闡釋本發明之實施例。所有圖式中類似參考特徵用來指示類似部分。Referring to the drawings, embodiments of the invention are set forth in detail below. Similar reference features in all figures are used to indicate like parts.
參看圖式，圖1為一透視圖，其展示根據本發明之一實施例的液體洩漏感測器10之一輪廓。圖2為液體洩漏感測器10之一截面圖。該液體洩漏感測器10(例如)包括彼此相隔之一對或複數個電極，且由此等電極之間的電傳導可感測電極之間的液體之存在(洩漏或浸沒水之存在)，意即，該液體洩漏感測器10為電類型。Referring to the drawings, Figure 1 is a perspective view showing an outline of a liquid leakage sensor 10 in accordance with an embodiment of the present invention. 2 is a cross-sectional view of the liquid leakage sensor 10. The liquid leakage sensor 10, for example, includes one or a plurality of electrodes spaced apart from one another, and whereby electrical conduction between the electrodes senses the presence of liquid between the electrodes (the presence of leakage or immersion water), That is, the liquid leakage sensor 10 is of an electrical type.
如圖式中所示，液體洩漏感測器10可包括(例如)一電絕緣線性核心構件12，及一對導線14、16，其個別地成螺旋狀位於核心構件12之表面12a上且在表面12a上經配置成彼此相隔。此等導線14、16分別充當液體洩漏感測器10之一電極。在無偵測操作時，該等導線14、16在核心構件12之表面12a上彼此絕緣。As shown in the figures, the liquid leakage sensor 10 can include, for example, an electrically insulative linear core member 12, and a pair of wires 14, 16 that are individually helically located on the surface 12a of the core member 12 and at The surface 12a is configured to be spaced apart from each other. These wires 14, 16 act as one of the electrodes of the liquid leakage sensor 10, respectively. The wires 14, 16 are insulated from each other on the surface 12a of the core member 12 during the non-detecting operation.
液體洩漏感測器10之該對導線14、16(例如)連接至洩漏偵測器18，以與液體洩漏感測器10一起構成洩漏偵測系統。歸因於所述，構成偵測電路。由洩漏偵測器18施加電壓於此等導線14、16上。當液體介於導線14與導線16之間且此等導線14、16彼此電橋接時，一電流經由該液體在導線14、16中流動，使得可感測該液體存在。該洩漏偵測器18偵測該偵測電路之電阻值作為該液體洩漏感測器10之液體感測信號，該電阻值根據橋接液體洩漏感測器10之導線14、16之液體量上的增加及減少而改變。然後，例如，該洩漏偵測器18執行諸如告警生成之通知行為。The pair of wires 14, 16 of the liquid leakage sensor 10, for example, are coupled to the leak detector 18 to form a leak detection system with the liquid leakage sensor 10. Due to the above, the detection circuit is constructed. Voltage is applied to the conductors 14, 16 by the leak detector 18. When the liquid is interposed between the wire 14 and the wire 16 and the wires 14, 16 are electrically bridged to each other, a current flows through the liquid in the wires 14, 16 such that the presence of the liquid can be sensed. The leak detector 18 detects the resistance value of the detecting circuit as a liquid sensing signal of the liquid leakage sensor 10, and the resistance value is based on the amount of liquid of the wires 14, 16 of the bridge liquid leakage sensor 10. Increase and decrease and change. Then, for example, the leak detector 18 performs a notification behavior such as alarm generation.
在具有上述結構之液體洩漏感測器10之實施例中，例如，充當特性彼此相異之一對電極之導線14、16分別纏繞在核心構件12之表面12a上。因此，沿表面12a而量測之導線14與導線16之間的最小距離可由沿核心構件12之圓周方向之一距離而界定。因此，例如，當核心構件12之厚度相對薄(例如幾毫米)時，導線14與導線16之間的最小間隔可相對薄(例如幾毫米)。因此，例如，可獲得能偵測相對小量液體之高敏感性液體洩漏感測器10。In the embodiment of the liquid leakage sensor 10 having the above structure, for example, the wires 14, 16 serving as a pair of electrodes different in characteristics from each other are wound around the surface 12a of the core member 12, respectively. Thus, the minimum distance between the wire 14 and the wire 16 measured along the surface 12a can be defined by a distance along the circumferential direction of the core member 12. Thus, for example, when the thickness of the core member 12 is relatively thin (e.g., a few millimeters), the minimum spacing between the wires 14 and the wires 16 can be relatively thin (e.g., a few millimeters). Thus, for example, a highly sensitive liquid leakage sensor 10 capable of detecting relatively small amounts of liquid can be obtained.
另一方面，例如，當諸如露水(非洩漏水或浸沒水)之非常小量液體存在於置放有液體洩漏感測器10之表面上時，用於感測液體之導線14與導線16之間的間隔為核心構件12之縱向上之一距離，而不考慮核心構件12之厚度。當該對導線14、16在核心構件12之縱向上經配置成彼此分隔時，例如，相隔10毫米，則難以感測非常小量之液體(諸如形成於置放有液體洩漏感測器之表面上之露水)。因此，例如，可獲得很少引起錯誤操作之液體洩漏感測器10。On the other hand, for example, when a very small amount of liquid such as dew (non-leakage water or immersion water) is present on the surface on which the liquid leakage sensor 10 is placed, the wire 14 for sensing the liquid and the wire 16 The spacing between the ones is a distance in the longitudinal direction of the core member 12 regardless of the thickness of the core member 12. When the pair of wires 14, 16 are configured to be spaced apart from each other in the longitudinal direction of the core member 12, for example, 10 mm apart, it is difficult to sense a very small amount of liquid (such as formed on the surface on which the liquid leakage sensor is placed) On the dew). Thus, for example, a liquid leakage sensor 10 that rarely causes erroneous operation can be obtained.
另外，此液體洩漏感測器10之結構之實施例可包括僅纏繞在電絕緣核心構件12周圍之複數個導線14、16。因此，例如，當液體洩漏感測器10在感測到洩漏水之後恢復至初始狀態時，附著至核心構件12及導線14、16之液體可被易於且迅速移除。如上所述，例如，液體洩漏感測器10係高度靈敏且另外其可防止由非常小量之非洩漏或浸沒水之液體引起之錯誤操作之發生。另外，附著液體可在恢復時易於被移除。Additionally, embodiments of the structure of the liquid leakage sensor 10 can include a plurality of wires 14, 16 that are only wrapped around the electrically insulating core member 12. Thus, for example, when the liquid leakage sensor 10 returns to the initial state after sensing the leaked water, the liquid attached to the core member 12 and the wires 14, 16 can be easily and quickly removed. As described above, for example, the liquid leakage sensor 10 is highly sensitive and additionally prevents the occurrence of erroneous operations caused by a very small amount of non-leakage or immersion liquid. In addition, the attached liquid can be easily removed upon recovery.
在上述液體洩漏感測器10中，例如，自易於恢復工作之觀點，由水吸收係數較低之之絕緣樹脂(諸如聚氯乙烯)製成核心構件12係有利的。舉例而言，由抗腐蝕性高之優良導體(諸如不銹鋼)製成該等導線14、16。為確保機械強度且使該等導線易於處理，該等導線可包含絞線。另外，例如，核心構件12及導線14、16可為可撓性的，使得其能自由彎曲且能置於置放有液體洩漏感測器10之各種表面上。In the above liquid leakage sensor 10, for example, from the viewpoint of easy recovery work, it is advantageous to form the core member 12 from an insulating resin having a low water absorption coefficient such as polyvinyl chloride. For example, the wires 14, 16 are made of a good conductor having high corrosion resistance such as stainless steel. To ensure mechanical strength and to make the wires easy to handle, the wires may comprise stranded wires. Additionally, for example, the core member 12 and the wires 14, 16 can be flexible such that they are free to bend and can be placed on various surfaces on which the liquid leakage sensor 10 is placed.
如圖2所示，例如，該核心構件12可包括一對凹槽20、22，其個別地成螺旋狀形成於核心構件12之表面12a上，且每一該對導線14、16(例如)可在容納於每一凹槽20、22中而固定於其中。歸因於上述結構，當每一凹槽20、22預先形成為螺旋狀，其對應於每一導線14、16所需之使得導線可用作電極之形狀時，導線14、16可易於沿著核心構件12之表面12a經配置成預定螺旋纏繞形態。在此點上，例如，可由一擠壓成形機以一方式使得核心構件12及該對導線14、16之材料同時***一擠壓模且經適當扭轉而製成此液體洩漏感測器10。As shown in FIG. 2, for example, the core member 12 can include a pair of grooves 20, 22 that are individually spirally formed on the surface 12a of the core member 12, and each of the pair of wires 14, 16 (for example) It can be fixed therein by being accommodated in each of the grooves 20, 22. Due to the above structure, when each of the grooves 20, 22 is previously formed in a spiral shape corresponding to the shape required for each of the wires 14, 16, so that the wires can be used as the shape of the electrodes, the wires 14, 16 can be easily followed along The surface 12a of the core member 12 is configured to be in a predetermined spirally wound configuration. In this regard, for example, the liquid leakage sensor 10 can be made by an extrusion molding machine in such a manner that the core member 12 and the materials of the pair of wires 14, 16 are simultaneously inserted into an extrusion die and appropriately twisted.
如圖1所示，例如，該對導線14、16分別將暴露表面部分14a、16a在液體洩漏感測器10之一預定感測區之大體整個長度上(即預定長度區域)連續暴露於核心構件12之表面12a上係有利的。根據此實施例之結構，可在液體洩漏感測器10之感測區中之任何位置處感測液體之局部存在。另外，由於該液體附著至核心構件表面12a的同時由於表面張力的作用而橋接該對導線14、16之液體自動沿著導線14、16而擴展，故一電流易於在液體中流動。因此，例如，即使阻抗相對高之純淨水亦可被明確感測。在此狀況下，例如，較佳圖2中所示之橫截面圖中的導線14、16之約50%之表面為暴露表面部分14a、16a(當然可使用多於或小於50%之任何所需暴露量)。As shown in FIG. 1, for example, the pair of wires 14, 16 respectively expose the exposed surface portions 14a, 16a to the core substantially over the entire length of the predetermined sensing region of the liquid leakage sensor 10 (ie, a predetermined length region). The surface 12a of the member 12 is advantageous. According to the structure of this embodiment, the local presence of the liquid can be sensed at any position in the sensing region of the liquid leakage sensor 10. In addition, since the liquid adheres to the core member surface 12a while the liquid bridging the pair of wires 14, 16 is automatically expanded along the wires 14, 16 due to the surface tension, a current is liable to flow in the liquid. Therefore, for example, even pure water having a relatively high impedance can be clearly sensed. In this case, for example, preferably about 50% of the surfaces of the wires 14, 16 in the cross-sectional view shown in Figure 2 are exposed surface portions 14a, 16a (of course any more or less than 50% can be used) The amount of exposure required).
如圖1中所示，例如，該對導線14、16以規則間隔在液體洩漏感測器10之預定感測區之大體整個長度上經配置於核心構件12之表面12a上係有利的。根據此實施例之結構，可確保在該液體洩漏感測器10之感測區中之一大體均勻之敏感度。當一導線14(16)之纏繞節距P(如圖1所示)設定在例如約10 mmP100 mm範圍內，較佳在約20 mmP50 mm範圍內時，且當該對導線14、16彼此配置在核心構件表面12a上之相對側上(相位差為180度)時，該對導線14、16可如述以規則間隔配置。在此狀況下，當每一導線14、16之纏繞節距P短於10毫米時，趨勢為靈敏度變得太高且由露水引起錯誤操作。當每一導線14、16之纏繞節距P超過100毫米時，敏感度變得太低且不可能滿足確保高敏感度之需求。在液體洩漏感測器10中，當每一導線14、16之纏繞節距P經適當判定於上述範圍中時，可易於調節該敏感度。As shown in FIG. 1, for example, the pair of wires 14, 16 are advantageously disposed over the surface 12a of the core member 12 over substantially the entire length of the predetermined sensing region of the liquid leakage sensor 10 at regular intervals. According to the structure of this embodiment, a substantially uniform sensitivity in one of the sensing regions of the liquid leakage sensor 10 can be ensured. When the winding pitch P (shown in Figure 1) of a wire 14 (16) is set at, for example, about 10 mm P In the range of 100 mm, preferably about 20 mm P In the range of 50 mm, and when the pair of wires 14, 16 are disposed on opposite sides of the core member surface 12a from each other (phase difference is 180 degrees), the pair of wires 14, 16 may be arranged at regular intervals as described. In this case, when the winding pitch P of each of the wires 14, 16 is shorter than 10 mm, there is a tendency that the sensitivity becomes too high and erroneous operation is caused by dew. When the winding pitch P of each of the wires 14, 16 exceeds 100 mm, the sensitivity becomes too low and it is impossible to satisfy the demand for ensuring high sensitivity. In the liquid leakage sensor 10, the sensitivity can be easily adjusted when the winding pitch P of each of the wires 14, 16 is appropriately determined in the above range.
舉例而言，如圖2所示，核心構件12之表面12a可大體上為圓柱形。根據此實施例之結構，每一導線14、16可易於且精確地以螺旋狀纏繞在核心構件表面12a上。然而，該核心構件12之表面12a可不限於上述特定結構。在圖2所示之橫截面圖中，例如，可採用多種形狀之核心構件12之表面12a諸如橢圓形、多邊形等。在此點上，如前所述，在由擠壓構件形成核心構件12之狀況下，當該對導線14、16在核心構件12固化前纏繞在核心構件表面12a上時，導線14，16可根據核心構件12之固化而固定至核心構件12。或者，導線14、16可由黏著劑固定於核心構件12之凹槽20、22內。For example, as shown in FIG. 2, the surface 12a of the core member 12 can be generally cylindrical. According to the structure of this embodiment, each of the wires 14, 16 can be easily and accurately wound in a spiral shape on the core member surface 12a. However, the surface 12a of the core member 12 may not be limited to the specific structure described above. In the cross-sectional view shown in Fig. 2, for example, the surface 12a of the core member 12 of various shapes such as an ellipse, a polygon, or the like can be employed. In this regard, as described above, in the case where the core member 12 is formed by the pressing member, when the pair of wires 14, 16 are wound around the core member surface 12a before the core member 12 is solidified, the wires 14, 16 may be It is fixed to the core member 12 in accordance with the solidification of the core member 12. Alternatively, the wires 14, 16 may be secured within the recesses 20, 22 of the core member 12 by an adhesive.
圖3及圖4為展示本發明之另一實施例之一液體洩漏感測器30之圖。該液體洩漏感測器30以一方式使得適當網構件32添加至前述之液體洩漏感測器10。該液體洩漏感測器30之結構之其他點與液體洩漏感測器10之彼等點大體相同。因此，類似參考特徵用來指示類似部分且在此處將省略闡釋。3 and 4 are views showing a liquid leakage sensor 30 of another embodiment of the present invention. The liquid leakage sensor 30 adds a suitable mesh member 32 to the aforementioned liquid leakage sensor 10 in a manner. Other points of the structure of the liquid leakage sensor 30 are substantially the same as those of the liquid leakage sensor 10. Therefore, similar reference features are used to indicate like parts and the explanation will be omitted herein.
該液體洩漏感測器30可進一步包括(例如)一電絕緣網狀構件32，其具有一經配置而涵蓋該網狀構件32之液體通過特性。該網狀構件32以一方式使得網狀構件32在自外部之該對導線14，16之整個長度上覆蓋該對導線14、16而經配置於至少在該液體洩漏感測器30之一預定感測區中。歸因於此結構，液體洩漏感測器30實際上可直接置放於一導管之一導電表面上。The liquid leakage sensor 30 can further include, for example, an electrically insulating mesh member 32 having a liquid passage characteristic configured to encompass the mesh member 32. The mesh member 32 is such that the mesh member 32 covers the pair of wires 14, 16 over the entire length of the pair of wires 14, 16 from the outside and is configured to be at least one of the liquid leakage sensors 30. In the sensing area. Due to this configuration, the liquid leakage sensor 30 can be placed directly on one of the conductive surfaces of a catheter.
液體洩漏感測器30之網狀構件32之密度較低，例如，網狀構件32之網眼較粗，使得液體洩漏感測器30本身不具有水固持功能。理由為液體洩漏感測器10之敏感度充分高，即使當該液體洩漏感測器10不具有網狀構件32且無需該網狀構件32對敏感度有所貢獻時亦然。因此，儘管液體洩漏感測器30包括網狀構件32，可採用與液體洩漏感測器10之方式相同的方式防止液體洩漏感測器30之誤操作，且在恢復工作時可易於移除液體。The density of the mesh member 32 of the liquid leakage sensor 30 is low, for example, the mesh of the mesh member 32 is relatively thick, so that the liquid leakage sensor 30 itself does not have a water holding function. The reason is that the sensitivity of the liquid leakage sensor 10 is sufficiently high even when the liquid leakage sensor 10 does not have the mesh member 32 and does not require the mesh member 32 to contribute to sensitivity. Therefore, although the liquid leakage sensor 30 includes the mesh member 32, the erroneous operation of the liquid leakage sensor 30 can be prevented in the same manner as the liquid leakage sensor 10, and the liquid can be easily removed when the operation is resumed.
有利的係該網狀構件32由水吸收係數較低且機械強度較高之絕緣材料製成，例如聚丙烯、聚乙烯對苯二甲酸酯及聚酯。歸因於前述，網狀構件32可具有將該對導線14、16固定於核心構件12之表面12a上之輔助固定功能且亦具有保護該導線14、16之機械保護功能。Advantageously, the mesh member 32 is made of an insulating material having a low water absorption coefficient and a high mechanical strength, such as polypropylene, polyethylene terephthalate, and polyester. Due to the foregoing, the mesh member 32 can have an auxiliary securing function for securing the pair of wires 14, 16 to the surface 12a of the core member 12 and also has a mechanical protection function to protect the wires 14, 16.
該網狀構件32可(例如)包括沿著核心構件12之表面12a而個別地纏繞在該對導線14、16周圍之複數個纖維元件34。在圖式中所示之實施例中，當八個纖維元件34個別地沿著核心構件12之表面12a而纏繞時，便構成該網狀構件32。更具體而言，四個反時針方向纖維元件34a及四個順時針方向纖維元件34b(圖4所示)在整個長度上以規則間隔在核心構件表面12a上經配置成至少在液體洩漏感測器30之一預定感測區中。歸因於前述，可構成整個主體中密度均勻之網狀構件32。當纖維元件34a(34b)之纏繞節距設定在自約10毫米至約100毫米之範圍內，較佳(例如)與上文所述之洩漏導線14、16之纏繞節距P相同，在約20毫米至約50毫米之範圍內時，可相對容易地獲得密度相對高以具有上述操作功能之網狀構件32。在此點上，纖維元件34之直徑可為0.1毫米至0.6毫米。The mesh member 32 can, for example, include a plurality of fiber elements 34 that are individually wrapped around the pair of wires 14, 16 along the surface 12a of the core member 12. In the embodiment shown in the drawings, the mesh member 32 is constructed when the eight fiber members 34 are individually wound along the surface 12a of the core member 12. More specifically, four counterclockwise fiber elements 34a and four clockwise fiber elements 34b (shown in Figure 4) are configured at regular intervals over the entire length of the core member surface 12a to be at least for liquid leakage sensing. One of the devices 30 is predetermined in the sensing area. Due to the foregoing, the mesh member 32 having a uniform density throughout the body can be constructed. When the winding pitch of the fiber member 34a (34b) is set in the range of from about 10 mm to about 100 mm, it is preferably, for example, the same as the winding pitch P of the leakage wires 14, 16 described above. In the range of 20 mm to about 50 mm, the mesh member 32 having a relatively high density to have the above-described operational function can be obtained relatively easily. In this regard, the fiber member 34 may have a diameter of 0.1 mm to 0.6 mm.
上述液體感測器30之液體感測能力係針對導電率為140 μS/cm之城市用水及導電率為0.7 μS/cm之純淨水而量測。在實驗中，液體洩漏感測器30經置放於丙烯酸板上。當一9伏直流電壓之脈衝電壓施加於一對導線14、16之間時，城鎮用水與純淨水直接自一注射器滴至該液體洩漏感測器30，且量測偵測電路之電阻上的改變。作為一比較性實例，針對習知低敏感度類型液體洩漏感測器(由3M公司製造的B－3P)及習知高敏感度類型液體洩漏感測器(由3M公司製造的S－1F)作相同實驗。The liquid sensing capability of the liquid sensor 30 described above was measured for urban water having a conductivity of 140 μS/cm and purified water having a conductivity of 0.7 μS/cm. In the experiment, the liquid leakage sensor 30 was placed on an acrylic plate. When a pulse voltage of a 9 volt DC voltage is applied between a pair of wires 14, 16, the town water and pure water are directly dropped from a syringe to the liquid leakage sensor 30, and the resistance of the detection circuit is measured. change. As a comparative example, a conventional low-sensitivity type liquid leakage sensor (B-3P manufactured by 3M Company) and a conventional high-sensitivity type liquid leakage sensor (S-1F manufactured by 3M Company) Do the same experiment.
關於城鎮用水之實驗結果為：當滴下之水量不多於一毫升時，液體洩漏感測器30不產生感測訊號，意即該液體洩漏感測器30展示與習知低敏感度類型液體洩漏感測器(B－3P)相同穩定之敏感度以使得很少引起誤操作。在習知高敏感度類型液體洩漏感測器(S－1F)的狀況下感測到上述小量城鎮用水。因此，存在由露水引起之誤操作的可能性。關於純淨水，當滴下之液體量超過4毫升時，液體洩漏感測器30產生一感測訊號，意即展示與習知高敏感度類型液體洩漏感測器(S－1F)相同優良之敏感度。對於習知低敏感度類型液體洩漏感測器(B－3P)而言，在不考慮純淨水之量的情況下則難以感測純淨水之存在。另外，在液體洩漏感測器30的狀況下，易於擦除附著之液體。因此，證明液體洩漏感測器30可易於恢復至初始狀態。The experimental result on urban water use is: when the amount of water dripping is not more than one milliliter, the liquid leakage sensor 30 does not generate a sensing signal, that is, the liquid leakage sensor 30 exhibits a liquid leakage with a conventional low sensitivity type. The sensor (B-3P) has the same stable sensitivity so that it rarely causes erroneous operation. The above-mentioned small amount of urban water is sensed under the condition of a conventional high sensitivity type liquid leakage sensor (S-1F). Therefore, there is a possibility of erroneous operation caused by dew. With respect to pure water, when the amount of liquid dripping exceeds 4 ml, the liquid leakage sensor 30 generates a sensing signal, which means exhibiting the same excellent sensitivity as the conventional high sensitivity type liquid leakage sensor (S-1F). degree. For the conventional low sensitivity type liquid leakage sensor (B-3P), it is difficult to sense the presence of pure water without considering the amount of pure water. In addition, in the case of the liquid leakage sensor 30, it is easy to erase the attached liquid. Therefore, it is proved that the liquid leakage sensor 30 can be easily restored to the initial state.
應瞭解，本發明不限於圖式中所示之上述特定實施例，在不脫離本發明之申請專利範圍之範疇的情況下，而熟習此項技術者可作某些變化。舉例而言，用作液體洩漏感測器之電極之導線數目不限於一對導線。可採用其中提供三個或三個以上導線之結構。在此狀況下，例如，一導線可用於指定液體洩漏感測器之感測區中之一洩漏位置。It is to be understood that the invention is not limited to the specific embodiments shown in the drawings, and may be modified by those skilled in the art without departing from the scope of the invention. For example, the number of wires used as electrodes of the liquid leakage sensor is not limited to a pair of wires. A structure in which three or more wires are provided may be employed. In this case, for example, a wire can be used to specify one of the leak locations in the sensing region of the liquid leakage sensor.
10．．．液體洩漏感測器10. . . Liquid leak sensor
12．．．核心構件12. . . Core component
12a．．．核心構件表面12a. . . Core component surface
14．．．導線14. . . wire
14a．．．暴露表面部分14a. . . Exposed surface part
16．．．導線16. . . wire
16a．．．暴露表面部分16a. . . Exposed surface part
18．．．洩漏偵測器18. . . Leak detector
20．．．凹槽20. . . Groove
22．．．凹槽twenty two. . . Groove
30．．．液體洩漏感測器30. . . Liquid leak sensor
32．．．網狀構件32. . . Mesh member
34．．．纖維元件34. . . Fiber component
34a．．．反時針方向纖維元件34a. . . Counterclockwise fiber element
34b．．．順時針方向纖維元件34b. . . Clockwise fiber component
P．．．纏繞節距P. . . Winding pitch
圖1展示一透視圖，其示意性地展示根據本發明之一實施例之一液體洩漏感測器。1 shows a perspective view schematically showing a liquid leakage sensor in accordance with an embodiment of the present invention.
圖2展示圖1中所示之液體洩漏感測器沿線II－II截得之一截面圖。Figure 2 shows a cross-sectional view of the liquid leakage sensor shown in Figure 1 taken along line II-II.
圖3展示一透視圖，其示意性展示根據本發明之另一實施例之一液體洩漏感測器。3 shows a perspective view schematically showing a liquid leakage sensor in accordance with another embodiment of the present invention.
圖4展示圖3中所示之液體洩漏感測器沿線IV－IV截得之一截面圖。4 shows a cross-sectional view of the liquid leakage sensor shown in FIG. 3 taken along line IV-IV.
10．．．液體洩漏感測器10. . . Liquid leak sensor
12．．．核心構件12. . . Core component
12a．．．核心構件表面12a. . . Core component surface
14．．．導線14. . . wire
14a．．．暴露表面部分14a. . . Exposed surface part
16．．．導線16. . . wire
16a．．．暴露表面部分16a. . . Exposed surface part
18．．．洩漏偵測器18. . . Leak detector
P．．．纏繞節距P. . . Winding pitch
Claims (5)
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| JP2005034194A JP4780970B2 (en) | 2005-02-10 | 2005-02-10 | Leak sensor |
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| TW200636222A TW200636222A (en) | 2006-10-16 |
| TWI403710B true TWI403710B (en) | 2013-08-01 |
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| JP (1) | JP4780970B2 (en) |
| TW (1) | TWI403710B (en) |
| WO (1) | WO2006086178A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4621746B2 (en) * | 2008-01-21 | 2011-01-26 | 村本建設株式会社 | Water leakage detection device |
| US8087430B1 (en) | 2009-02-26 | 2012-01-03 | Betz James C | Leak detecting hose |
| EP2330397B1 (en) * | 2009-12-03 | 2018-02-21 | Ttk | Cable, module and installation for the detection and the localization of conductive liquid leaks. |
| JP2013200220A (en) * | 2012-03-26 | 2013-10-03 | Tatsuta Electric Wire & Cable Co Ltd | Liquid leakage detection wire and electrode for liquid leakage detection wire |
| US9719951B1 (en) | 2013-07-12 | 2017-08-01 | Helvetia Wireless Llc | Method and apparatus for moisture detection |
| US9245438B2 (en) | 2014-05-27 | 2016-01-26 | Delta Faucet Company | Water leak detector for a pipe having a retention reservoir |
| US10191003B1 (en) | 2014-12-18 | 2019-01-29 | Helvetia Wireless Llc | Methods and apparatus for a moisture detector |
| US9828950B2 (en) | 2015-09-25 | 2017-11-28 | GM Global Technology Operations LLC | Systems and methods for detecting damage in a positive crankcase ventilation tube |
| JP6471075B2 (en) * | 2015-10-06 | 2019-02-13 | タツタ電線株式会社 | Cable and liquid detection member for cable |
| WO2017115145A1 (en) | 2015-12-31 | 2017-07-06 | Delta Faucet Company | Water sensor |
| KR101842541B1 (en) * | 2016-08-29 | 2018-03-28 | 플로우닉스 주식회사 | Leak sensor for detecting of non-conducting liquid |
| KR101764735B1 (en) | 2016-11-22 | 2017-08-09 | 김동언 | Driving circuit for leak detecting sensor |
| RU173364U1 (en) * | 2017-04-03 | 2017-08-23 | Дмитрий Александрович Бурляй | Fluid leakage sensor |
| FR3066272B1 (en) * | 2017-05-12 | 2019-07-19 | Sasha Dabetic | CONDUCTIVE AND NON-CONDUCTING LIQUID DETECTOR CABLE |
| WO2018231108A1 (en) * | 2017-06-15 | 2018-12-20 | Mikrodust Ab | A system and a method for detecting moisture comprising a cable, a cable for detecting moisture and a moisture detection device |
| DE102018201422A1 (en) * | 2018-01-30 | 2019-08-01 | Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Bamberg | Electronic control unit |
| RU186924U1 (en) * | 2018-10-22 | 2019-02-11 | Владимир Степанович Кондратенко | Cable humidity and leakage sensor |
| US11422104B2 (en) | 2019-09-06 | 2022-08-23 | Apple Inc. | Exposed wire-bonding for sensing liquid and water in electronic devices |
| CN112461431B (en) * | 2019-09-06 | 2022-07-26 | 苹果公司 | Electronic device, pressure sensor assembly and method of sensing liquid at a sensor |
| KR20230101811A (en) * | 2020-11-06 | 2023-07-06 | 생-고뱅 퍼포먼스 플라스틱스 코포레이션 | Leak detection systems and methods of making and using them |
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| US5235286A (en) * | 1985-06-12 | 1993-08-10 | Raychem Corporation | Method for detecting and obtaining information about changers in variables |
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| JP2523688B2 (en) * | 1987-09-29 | 1996-08-14 | 株式会社東芝 | Semiconductor package |
| JPH032253A (en) * | 1989-05-31 | 1991-01-08 | Japan Synthetic Rubber Co Ltd | Thermoplastic resin composition |
| JP2931613B2 (en) * | 1990-02-13 | 1999-08-09 | 住友スリーエム株式会社 | Water leak detection sensor |
| GB2275555A (en) * | 1993-02-25 | 1994-08-31 | Northern Telecom Ltd | Sensor cable |
| JPH1062290A (en) * | 1996-08-19 | 1998-03-06 | Teijin Ltd | Sensor wire for detecting water leakage |
| US6144209A (en) * | 1998-04-07 | 2000-11-07 | Raymond & Lae Engineering, Inc. | Fluid detection cable |
| US6777947B2 (en) * | 2002-04-29 | 2004-08-17 | Tyco Thermal Controls Llc. | Sensor cable |
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2005
- 2005-02-10 JP JP2005034194A patent/JP4780970B2/en not_active Expired - Fee Related
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2006
- 2006-01-31 WO PCT/US2006/003277 patent/WO2006086178A1/en active Application Filing
- 2006-02-09 TW TW95104393A patent/TWI403710B/en not_active IP Right Cessation
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5235286A (en) * | 1985-06-12 | 1993-08-10 | Raychem Corporation | Method for detecting and obtaining information about changers in variables |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2006220537A (en) | 2006-08-24 |
| WO2006086178A1 (en) | 2006-08-17 |
| TW200636222A (en) | 2006-10-16 |
| JP4780970B2 (en) | 2011-09-28 |
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| MM4A | Annulment or lapse of patent due to non-payment of fees |