JP7057562B2 - Sensor device - Google Patents

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JP7057562B2
JP7057562B2 JP2018043732A JP2018043732A JP7057562B2 JP 7057562 B2 JP7057562 B2 JP 7057562B2 JP 2018043732 A JP2018043732 A JP 2018043732A JP 2018043732 A JP2018043732 A JP 2018043732A JP 7057562 B2 JP7057562 B2 JP 7057562B2
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fiber
plastic plate
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哲也 辻上
文基 星山
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Ryukoku University
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特許法第３０条第２項適用 集会名：第１５回機会，構造物の強度設計・安全性評価に関するシンポジウム 開催日：平成２９年１０月１３日Application of Article 30, Paragraph 2 of the Patent Law Meeting name: 15th Opportunity, Symposium on Strength Design and Safety Evaluation of Structures Date: October 13, 2017

本発明は、構造物のひび割れ拡大や構造物における相対変位を検知するためのセンサ装置に関する。 The present invention relates to a sensor device for detecting crack expansion of a structure and relative displacement in the structure.

近年、コンクリート構造物の老朽化による剥落事故が問題となっており、老朽化の加速要因としてコンクリートのひび割れが挙げられる。しかしながら、コンクリートのひび割れを完全に阻止することは難しいため、ひび割れの拡大を早急に検知して対処することが重要となる。 In recent years, peeling accidents due to aging of concrete structures have become a problem, and cracks in concrete can be cited as a factor accelerating aging. However, since it is difficult to completely prevent cracks in concrete, it is important to detect and deal with the expansion of cracks as soon as possible.

このようなコンクリートのひび割れを検知するひび割れセンサとして、特許文献１では繊維含有プラスチックプレートの白化現象を利用したものが提案されている。このひび割れセンサは、コンクリートのひび割れ部を跨ぐように貼付され、ひび割れ幅の拡大に対応して増大するプラスチックプレートの白化部分の面積に基づいてひび割れの拡大を推定できるようにされている。しかしながら、特許文献１のセンサでは、プラスチックプレートを直接目視する必要があることから、ひび割れ幅を常時検知することはできなかった。 As a crack sensor for detecting such cracks in concrete, Patent Document 1 proposes one using the whitening phenomenon of a fiber-containing plastic plate. This crack sensor is attached so as to straddle the crack portion of the concrete so that the expansion of the crack can be estimated based on the area of the whitened portion of the plastic plate that increases in response to the expansion of the crack width. However, the sensor of Patent Document 1 cannot always detect the crack width because it is necessary to directly visually check the plastic plate.

一方、特許文献２では、リード線と一体化された繊維強化プラスチックシートをコンクリート構造物の表面に設けることで、コンクリート構造物を補強しつつ、リード線の断線に基づいてコンクリート構造物における異常の発生を検知するものが提案されている。この方法であれば、特許文献１に開示のものと異なり、コンクリート構造物における異常の発生を常時検知することが可能である。 On the other hand, in Patent Document 2, a fiber-reinforced plastic sheet integrated with a lead wire is provided on the surface of the concrete structure to reinforce the concrete structure and cause an abnormality in the concrete structure based on the disconnection of the lead wire. Those that detect the occurrence have been proposed. With this method, unlike the one disclosed in Patent Document 1, it is possible to constantly detect the occurrence of an abnormality in a concrete structure.

特開２０１２－９３２６０号公報Japanese Unexamined Patent Publication No. 2012-93260 特開２０１５－１０８２４０号公報JP-A-2015-108240

しかしながら、特許文献２の方法では、コンクリート構造物に異常が発生して繊維強化プラスチックシートが破断しても、リード線は直ぐには破断せず、コンクリート構造物における異常発生を敏感に検知できないという問題があった。 However, the method of Patent Document 2 has a problem that even if an abnormality occurs in the concrete structure and the fiber reinforced plastic sheet breaks, the lead wire does not break immediately and the occurrence of the abnormality in the concrete structure cannot be detected sensitively. was there.

そこで本発明は、構造物における異常発生をより敏感に検知できるセンサ装置の提供を目的とする。 Therefore, an object of the present invention is to provide a sensor device capable of more sensitively detecting the occurrence of an abnormality in a structure.

本発明のセンサ装置は、構造物の表面に貼付された繊維含有プラスチックプレートと、 前記繊維含有プラスチックプレートと一体化された導電性の金属箔と、前記構造物のひび割れを跨ぐように配置されて前記金属箔の破断を検知する検知手段と、を備え、前記ひび割れが拡大すると前記金属箔が破断し、前記検知手段は前記金属箔の破断を検知することを特徴とする。 The sensor device of the present invention is arranged so as to straddle the fiber-containing plastic plate attached to the surface of the structure, the conductive metal leaf integrated with the fiber-containing plastic plate, and the cracks of the structure. A detection means for detecting the breakage of the metal foil is provided, and when the crack expands, the metal foil breaks, and the detection means detects the breakage of the metal foil.

本発明のセンサ装置は、構造物の表面に貼付された繊維含有プラスチックプレートと、前記繊維含有プラスチックプレートと一体化された導電性の金属箔と、前記金属箔の破断を検知する検知手段と、を備え、前記構造物を構成する第１部材と第２部材との間に跨がるように配置されて前記第１部材に対して前記第２部材が相対的に移動すると前記金属箔が破断し、前記検知手段は前記金属箔の破断を検知することを特徴とする。 The sensor device of the present invention includes a fiber-containing plastic plate attached to the surface of a structure, a conductive metal leaf integrated with the fiber-containing plastic plate, and a detection means for detecting breakage of the metal leaf. The metal leaf is broken when the second member moves relative to the first member so as to straddle between the first member and the second member constituting the structure. However, the detecting means is characterized in that it detects the breakage of the metal foil.

本発明のセンサ装置によれば、金属箔を用いるので破断しやすく、ひび割れの拡大や構造物における相対変位を敏感に検知することができる。 According to the sensor device of the present invention, since the metal foil is used, it is easily broken, and it is possible to sensitively detect the expansion of cracks and the relative displacement in the structure.

本発明の実施形態に係るセンサ装置を示す概略図。The schematic which shows the sensor device which concerns on embodiment of this invention. 実施例において用いられた試験片の断面図。Sectional drawing of the test piece used in an Example. 実施例の試験結果を示すグラフ。The graph which shows the test result of an Example. 比較例において用いられた試験片の断面図。Sectional drawing of the test piece used in the comparative example. 比較例の試験結果を示すグラフ。The graph which shows the test result of the comparative example. 図１のセンサ装置の他の使用例を示す概略図。The schematic diagram which shows the other use example of the sensor device of FIG. 本発明の変形例に係るセンサ装置の主要部を示す概略図。The schematic diagram which shows the main part of the sensor apparatus which concerns on the modification of this invention.

以下、添付図面を参照して、本発明の実施形態に係るセンサ装置について説明する。なお、ここではコンクリートのひび割れ拡大を検知する場合を例に説明する。 Hereinafter, the sensor device according to the embodiment of the present invention will be described with reference to the accompanying drawings. Here, a case of detecting the expansion of cracks in concrete will be described as an example.

図１を参照して、本実施形態に係るセンサ装置１は、プリプレグ型の繊維含有プラスチックプレート２と、繊維含有プラスチックプレート２と一体化された導電体としての金属箔３と、金属箔３の破断を検知するための検知手段４と、を備える。金属箔３の両端には電極（図示せず）が設けられ、検知手段４は当該電極（図示せず）に接続された一対のリード線５を有し、金属箔３と電気的に接続されている。 With reference to FIG. 1, the sensor device 1 according to the present embodiment includes a prepreg type fiber-containing plastic plate 2, a metal leaf 3 as a conductor integrated with the fiber-containing plastic plate 2, and a metal leaf 3. A detection means 4 for detecting breakage is provided. Electrodes (not shown) are provided at both ends of the metal foil 3, and the detecting means 4 has a pair of lead wires 5 connected to the electrodes (not shown) and is electrically connected to the metal foil 3. ing.

繊維含有プラスチックプレート２は、基材に可視光線硬化性や紫外線硬化性の未硬化樹脂（例えば、ビニルエステル樹脂）を含浸させたプリプレグシートを硬化させて形成されるものであり、次の様にしてコンクリート１００の表面に貼付される。まず、プリプレグシートを、コンクリート１００の表面に現れたひび割れ１０１を跨ぐようにコンクリート１００に載置する。次に、ひび割れ１０１を跨ぐように金属箔３をプリプレグシートの表面に載置する。そして、可視光線照射又は紫外線照射によりプリプレグシートの未硬化樹脂を硬化させると、コンクリート１００及び金属箔３と一体化された繊維含有プラスチックプレート２が出来上がる。なお、金属箔３の上からもう一枚プリプレグシートを被せ、金属箔３を２枚のプリプレグシートで挟むようにしてもよく、或いはひび割れ１０１を跨ぐように金属箔３をコンクリート１００に載置し、その上からプリプレグシートを被せて金属箔３を覆う様にしてもよい。 The fiber-containing plastic plate 2 is formed by curing a prepreg sheet in which a base material is impregnated with a visible light-curable or ultraviolet-curable uncured resin (for example, vinyl ester resin), and is formed as follows. It is affixed to the surface of the concrete 100. First, the prepreg sheet is placed on the concrete 100 so as to straddle the cracks 101 appearing on the surface of the concrete 100. Next, the metal leaf 3 is placed on the surface of the prepreg sheet so as to straddle the crack 101. Then, when the uncured resin of the prepreg sheet is cured by irradiation with visible light or ultraviolet rays, the fiber-containing plastic plate 2 integrated with the concrete 100 and the metal leaf 3 is completed. It is also possible to cover the metal foil 3 with another prepreg sheet and sandwich the metal foil 3 between the two prepreg sheets, or place the metal foil 3 on the concrete 100 so as to straddle the crack 101. The metal foil 3 may be covered with a prepreg sheet from above.

このように構成されたセンサ装置１では、ひび割れ１０１が拡大すると繊維含有プラスチックプレート２及び金属箔３に引張力が作用し、繊維含有プラスチックプレート３が破断するのと同時に金属箔３が破断する。よって、検知手段４によりリード５を介して金属箔３の電極間に電圧をかけ、金属箔３における通電の有無を検知することにより、金属箔３の破断、ひいてはひび割れ１０１の拡大を検知することができる。なお、検知手段４は遠隔地に設置しておいてもよく、あるいは検知手段４に通報機能を持たせ、検知手段４から遠隔地に割れ１０１の拡大を通報するようにしても良い。 In the sensor device 1 configured in this way, when the crack 101 expands, a tensile force acts on the fiber-containing plastic plate 2 and the metal foil 3, and the metal foil 3 breaks at the same time as the fiber-containing plastic plate 3 breaks. Therefore, the detection means 4 applies a voltage between the electrodes of the metal foil 3 via the lead 5 to detect the presence or absence of energization in the metal foil 3, thereby detecting the breakage of the metal foil 3 and the expansion of the crack 101. Can be done. The detecting means 4 may be installed in a remote place, or the detecting means 4 may be provided with a reporting function so that the detecting means 4 notifies the remote place of the expansion of the crack 101.

このように、本実施形態では、導電体として金属箔３を用いることから、リード線を用いた場合と比較して、ひび割れ１０１の拡大をより敏感に検知することができる。これは、金属箔３の方がリード線よりも破断し易いことによる。金属箔３の方がリード線よりも破断し易い理由としては、リード線と比較して金属箔３の方が破断ひずみが小さく、また繊維含有プラスチックプレート２に対する接着面積が広く、繊維含有プラスチックプレート２からの剥離が起こりにくいことによるものと考えられる。 As described above, in the present embodiment, since the metal foil 3 is used as the conductor, the expansion of the crack 101 can be detected more sensitively as compared with the case where the lead wire is used. This is because the metal foil 3 is easier to break than the lead wire. The reason why the metal foil 3 is easier to break than the lead wire is that the metal foil 3 has a smaller breaking strain than the lead wire, has a wider adhesion area to the fiber-containing plastic plate 2, and has a fiber-containing plastic plate. It is considered that this is because peeling from 2 is unlikely to occur.

ここで、繊維含有プラスチックプレート２の強度が高く補強材としての役割が強すぎると、コンクリート１００の劣化が進行しているにも拘わらずひび割れ１０１の幅が広がらず、結果として金属箔３が破断しないおそれが生じる。したがって、コンクリート１００の劣化を敏感に検知するためには、繊維含有プラスチックプレート２の強度は低い方が好ましく、強度の弱い基材を用いつつ、ガラス繊維などの補強材が混ぜ込まれていないのが好ましい。 Here, if the strength of the fiber-containing plastic plate 2 is high and the role as a reinforcing material is too strong, the width of the crack 101 does not widen despite the progress of deterioration of the concrete 100, and as a result, the metal foil 3 breaks. There is a risk of not doing so. Therefore, in order to sensitively detect the deterioration of the concrete 100, it is preferable that the strength of the fiber-containing plastic plate 2 is low, and a reinforcing material such as glass fiber is not mixed while using a base material having a low strength. Is preferable.

和紙、紙、不織布を基材として用いた低強度繊維含有プラスチックプレートの試験片Ａ，Ｂ，Ｃ（幅１０ｍｍ）を作成し、各試験片Ａ，Ｂ，Ｃについてチャック間距離６０ｍｍ、引張速度２ｍｍ／分として、引張試験機を用いた引張試験を８回ずつ実施した。各試験片Ａ，Ｂ，Ｃの破断ひずみと標準偏差を表１に示す。 Test pieces A, B, C (width 10 mm) of a low-strength fiber-containing plastic plate using Japanese paper, paper, and non-woven fabric as a base material were prepared, and the chuck distance of each test piece A, B, C was 60 mm and the tensile speed was 2 mm. At / min, the tensile test using the tensile tester was carried out 8 times each. Table 1 shows the breaking strain and standard deviation of each test piece A, B, and C.

Figure 0007057562000001
何れの試験片Ａ，Ｂ，Ｃも破断ひずみは０．０１２～０．０１９と小さいものの、標準偏差は基材に和紙を用いた試験片Ａが最も小さい結果となった。従って、センサ装置１に用いる繊維含有プラスチックプレート２としては、基材に和紙、紙、不織布の何れかを用いた低強度プラスチックプレートであるのが好ましく、和紙を用いた低強度プラスチックプレートであるのが更に好ましい。
Figure 0007057562000001
 Although the breaking strains of all the test pieces A, B, and C were as small as 0.012 to 0.019, the standard deviation was the smallest for the test piece A using Japanese paper as the base material. Therefore, the fiber-containing plastic plate 2 used in the sensor device 1 is preferably a low-strength plastic plate using any of Japanese paper, paper, and non-woven fabric as a base material, and is a low-strength plastic plate using Japanese paper. Is more preferable.

［実施例］
図２に示す様に、繊維含有プラスチックプレート１２の上に幅１．０ｍｍのアルミニウム箔１３を置いてビニルエステル樹脂１４を塗布し、ビニルエステル樹脂１４を硬化させて幅２０ｍｍの試験片１０を作成した。この試験片１０についてチャック間距離６０ｍｍ、引張速度１ｍｍ／分で引張試験を行った。また、この引張試験中、本実験では、繊維含有プラスチックプレート１２とアルミニウム箔１３の抵抗を測定した。図３に変位に伴う荷重及びアルミニウム箔１３の抵抗のグラフを示す。 [Example]
As shown in FIG. 2, an aluminum foil 13 having a width of 1.0 mm is placed on a fiber-containing plastic plate 12, a vinyl ester resin 14 is applied, and the vinyl ester resin 14 is cured to prepare a test piece 10 having a width of 20 mm. bottom. A tensile test was performed on the test piece 10 at a chuck distance of 60 mm and a tensile speed of 1 mm / min. In addition, during this tensile test, the resistance between the fiber-containing plastic plate 12 and the aluminum foil 13 was measured in this experiment. FIG. 3 shows a graph of the load due to displacement and the resistance of the aluminum foil 13.

図３に示す様に、荷重の低下（繊維含有プラスチックプレート１２の破断）と同時にアルミニウム箔１３の抵抗値が上昇しており、繊維含有プラスチックプレート１２の破断とアルミニウム箔１３の破断との間にタイムラグがないことがわかる。 As shown in FIG. 3, the resistance value of the aluminum foil 13 increases at the same time as the load decreases (breakage of the fiber-containing plastic plate 12), and between the breakage of the fiber-containing plastic plate 12 and the breakage of the aluminum foil 13. It can be seen that there is no time lag.

［比較例］
図４に示す様に、２枚の繊維含有プラスチックプレート１２の間に直径０．５ｍｍのエナメル線２３を介在させ、ビニルエステル樹脂１４を硬化させて貼り合わせ、幅２０ｍｍの試験片２０を作成した。エナメル線２３の破断ひずみは０．４程度であった。この試験片２０について、チャック間距離６０ｍｍ、引張速度２ｍｍ／分で引張試験を行った。試験片２０の荷重と変位の関係を図５に示す。この引張試験では、図５に示すＰ１にて繊維含有プラスチックプレート１２が破断し、Ｐ２にてエナメル線２３が破断した。即ち、先に繊維含有プラスチックプレート１２のみが破断し、その後もエナメル線２３は暫く伸び続けた。繊維含有プラスチックプレート１２と同時にエナメル線２３が破断しなかった理由は、エナメル線２３の破断ひずみが繊維含有プラスチックシート１２の破断ひずみと比較して大きいこと、またエナメル線２３と繊維含有プラスチックプレート１２の接着力が十分でないために、繊維含有プラスチックシート１２の破断口で接着が剥がれ、エナメル線２３の引張における実質的なチャック間距離が大きくなったためと考えられる。 [Comparison example]
As shown in FIG. 4, an enamel wire 23 having a diameter of 0.5 mm was interposed between two fiber-containing plastic plates 12, and the vinyl ester resin 14 was cured and bonded to prepare a test piece 20 having a width of 20 mm. .. The breaking strain of the enamel wire 23 was about 0.4. A tensile test was performed on this test piece 20 at a chuck distance of 60 mm and a tensile speed of 2 mm / min. The relationship between the load and the displacement of the test piece 20 is shown in FIG. In this tensile test, the fiber-containing plastic plate 12 broke at P1 shown in FIG. 5, and the enamel wire 23 broke at P2. That is, only the fiber-containing plastic plate 12 broke first, and the enamel wire 23 continued to grow for a while after that. The reason why the enamel wire 23 did not break at the same time as the fiber-containing plastic plate 12 is that the breaking strain of the enamel wire 23 is larger than the breaking strain of the fiber-containing plastic sheet 12, and that the enamel wire 23 and the fiber-containing plastic plate 12 do not break. It is probable that the adhesive force was not sufficient, so that the adhesive was peeled off at the break opening of the fiber-containing plastic sheet 12, and the substantial distance between the chucks in the tension of the enamel wire 23 was increased.

以上、本発明の実施形態に係るセンサ装置について添付の図面を参照して説明したが、本発明はかかる実施形態に限定されず、本発明の範囲を逸脱することなく種々の変形、修正が可能である。 Although the sensor device according to the embodiment of the present invention has been described above with reference to the accompanying drawings, the present invention is not limited to such an embodiment, and various modifications and modifications can be made without departing from the scope of the present invention. Is.

例えば、センサ装置１は上述したようなコンクリート１００のひび割れ１０１の拡大検知のみならず、構造物における相対変位の検知等にも利用できる。例えば、図６に示す様に、第１単位構造物としての擁壁Ｗ１（第１部材）と擁壁Ｗ１に隣接して設置された第２単位構造物としての擁壁Ｗ２（第２部材）とを有する構造物２００にセンサ装置１を設けてもよい。この場合には、繊維含有プラスチックプレート２及び金属箔３が擁壁Ｗ１と擁壁Ｗ２との境２０１を跨ぐように設けておく。擁壁Ｗ１に対して擁壁Ｗ２が相対的に移動すると、繊維含有プラスチックプレート２及び金属箔３に引張力が作用し、繊維含有プラスチックプレート２と共に金属箔３が破断し、検知手段４はこれを検知する。 For example, the sensor device 1 can be used not only for detecting the enlargement of the crack 101 of the concrete 100 as described above, but also for detecting the relative displacement in the structure. For example, as shown in FIG. 6, the retaining wall W1 (first member) as the first unit structure and the retaining wall W2 (second member) as the second unit structure installed adjacent to the retaining wall W1. The sensor device 1 may be provided in the structure 200 having the above. In this case, the fiber-containing plastic plate 2 and the metal foil 3 are provided so as to straddle the boundary 201 between the retaining wall W1 and the retaining wall W2. When the retaining wall W2 moves relative to the retaining wall W1, a tensile force acts on the fiber-containing plastic plate 2 and the metal foil 3, the metal foil 3 breaks together with the fiber-containing plastic plate 2, and the detection means 4 has this. Is detected.

なお、第１単位構造物や第２単位構造物は上述したような擁壁Ｗ１，Ｗ２に限定されず、柱や天井、側壁、床、梁等であってもよい。 The first unit structure and the second unit structure are not limited to the retaining walls W1 and W2 as described above, and may be columns, ceilings, side walls, floors, beams, and the like.

また、第１部材や第２部材は構造物を構成する単位構造物である必要はなく、例えばセンサ装置１を用いて壁に打ち込まれたボルトの相対変位を検知することもできる。この場合には、繊維含有プラスチックプレート２及び金属箔３が壁（第１部材）とボルトが挿通されたワッシャ（第２部材）の境に跨がるように設置する。ボルトが壁に対して緩むとワッシャはボルトと共に壁に対して相対移動する。すると、センサ装置１の金属箔３は上述の様に破断し、検知手段４はこれを検知する。 Further, the first member and the second member do not have to be unit structures constituting the structure, and for example, the sensor device 1 can be used to detect the relative displacement of the bolt driven into the wall. In this case, the fiber-containing plastic plate 2 and the metal leaf 3 are installed so as to straddle the boundary between the wall (first member) and the washer (second member) through which the bolt is inserted. When the bolt loosens against the wall, the washer moves relative to the wall with the bolt. Then, the metal foil 3 of the sensor device 1 breaks as described above, and the detecting means 4 detects this.

更に、図７に示す様に、金属箔３に加えてエナメル線等のリード線６を併用してもよい。より具体的に、リード線６は金属箔３と並列配置されて繊維含有プラスチックプレート２と一体化され、検知手段４に電気的に接続される。金属箔３及びリード線６がコンクリート１００のひび割れ１０１や構造物２００における境２０１を跨ぐように配置しておき、ひび割れ１０１や構造物２００の境２０１が拡大すると繊維含有プラスチックプレート２が破断するのと同時に金属箔３が破断して検知手段４がこれを検知し、拡大が更に進行するとリード線６も破断して検知手段４がこれを検知する。このように、金属箔３とリード線６を併用することにより、ひび割れ１０１や境２０１の拡大を段階的に検知することができる。 Further, as shown in FIG. 7, a lead wire 6 such as an enamel wire may be used in combination with the metal foil 3. More specifically, the lead wire 6 is arranged in parallel with the metal foil 3, integrated with the fiber-containing plastic plate 2, and electrically connected to the detection means 4. The metal leaf 3 and the lead wire 6 are arranged so as to straddle the crack 101 of the concrete 100 and the boundary 201 of the structure 200, and when the crack 101 and the boundary 201 of the structure 200 expand, the fiber-containing plastic plate 2 breaks. At the same time, the metal leaf 3 breaks and the detecting means 4 detects this, and when the expansion further progresses, the lead wire 6 also breaks and the detecting means 4 detects this. In this way, by using the metal foil 3 and the lead wire 6 together, it is possible to detect the expansion of the crack 101 and the boundary 201 step by step.

１ センサ装置
２ 繊維含有プラスチックプレート
３ 金属箔
４ 検知手段
５ リード線
１００ コンクリート
１０１ ひび割れ
２００ 構造物
Ｗ１ 擁壁（第１部材、第１単位構造物）
Ｗ２ 擁壁（第２部材、第２単位構造物） 1 Sensor device 2 Fiber-containing plastic plate 3 Metal leaf 4 Detection means 5 Lead wire 100 Concrete 101 Crack 200 Structure W1 Retaining wall (1st member, 1st unit structure)
W2 retaining wall (second member, second unit structure)

Claims (5)

構造物の表面に貼付された繊維含有プラスチックプレートと、
前記繊維含有プラスチックプレートと一体化された導電性の金属箔と、
前記金属箔の破断を検知する検知手段と、を備え、
前記繊維含有プラスチックプレートは、和紙、紙、又は不織布を基材とするプリプレグシートからなり、
前記構造物のひび割れを跨ぐように配置されて前記ひび割れが拡大すると前記金属箔が破断し、前記検知手段は前記金属箔の破断を検知することを特徴とするセンサ装置。 A fiber-containing plastic plate attached to the surface of the structure,
A conductive metal foil integrated with the fiber-containing plastic plate,
A detection means for detecting the breakage of the metal foil is provided.
The fiber-containing plastic plate is made of a prepreg sheet based on Japanese paper, paper, or non-woven fabric.
A sensor device that is arranged so as to straddle a crack in the structure, and when the crack expands, the metal foil breaks, and the detection means detects the breakage of the metal foil. 構造物の表面に貼付された繊維含有プラスチックプレートと、
前記繊維含有プラスチックプレートと一体化された導電性の金属箔と、
前記金属箔の破断を検知する検知手段と、を備え、
前記繊維含有プラスチックプレートは、和紙、紙、又は不織布を基材とするプリプレグシートからなり、
前記構造物を構成する第１部材と第２部材との間に跨がるように配置されて前記第１部材に対して前記第２部材が相対的に移動すると前記金属箔が破断し、前記検知手段は前記金属箔の破断を検知することを特徴とするセンサ装置。 A fiber-containing plastic plate attached to the surface of the structure,
A conductive metal foil integrated with the fiber-containing plastic plate,
A detection means for detecting the breakage of the metal foil is provided.
The fiber-containing plastic plate is made of a prepreg sheet based on Japanese paper, paper, or non-woven fabric.
When the second member is arranged so as to straddle between the first member and the second member constituting the structure and the second member moves relative to the first member, the metal foil breaks and the metal leaf is broken. The detection means is a sensor device characterized by detecting the breakage of the metal foil. 前記プリプレグシートは、前記基材に可視光線硬化性又は紫外線硬化性の未硬化樹脂を含浸させたものであり、The prepreg sheet is obtained by impregnating the base material with a visible light curable or ultraviolet curable uncured resin.
前記繊維含有プラスチックプレートは、前記プリプレグシートが前記構造物の表面に貼付され前記金属箔が前記プリプレグシートに載置された状態で硬化されることによって形成されたものであることを特徴とする請求項１又は２に記載のセンサ装置。 The fiber-containing plastic plate is characterized in that the prepreg sheet is attached to the surface of the structure and the metal foil is cured while being placed on the prepreg sheet. Item 2. The sensor device according to Item 1 or 2. 前記繊維含有プラスチックプレートは、和紙を基材とする低強度繊維含有プラスチックシートであることを特徴とする請求項１～３の何れかに記載のセンサ装置。 The sensor device according to any one of claims 1 to 3, wherein the fiber-containing plastic plate is a low-strength fiber-containing plastic sheet using Japanese paper as a base material . 前記繊維含有プラスチックプレートと一体化され、前記金属箔と並列配置されたリード線を更に備え、
前記リード線が破断すると、前記検知手段はこれを検知することを特徴とする請求項１～４の何れかに記載のセンサ装置。 Further provided with lead wires integrated with the fiber-containing plastic plate and arranged in parallel with the metal leaf.
The sensor device according to any one of claims 1 to 4, wherein when the lead wire breaks, the detection means detects the break.
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