JP2003130857A - Damage sensing sheet - Google Patents
Damage sensing sheetInfo
- Publication number
- JP2003130857A JP2003130857A JP2001326533A JP2001326533A JP2003130857A JP 2003130857 A JP2003130857 A JP 2003130857A JP 2001326533 A JP2001326533 A JP 2001326533A JP 2001326533 A JP2001326533 A JP 2001326533A JP 2003130857 A JP2003130857 A JP 2003130857A
- Authority
- JP
- Japan
- Prior art keywords
- damage
- sensing sheet
- piezoelectric element
- damage sensing
- resin film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、陸海空輸送機、車
両および鉄骨構造体の経年変化や欠陥発生を常時モニタ
リングする損傷センシングシート（損傷検知装置）に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damage sensing sheet (damage detection device) for constantly monitoring secular changes and defects in land, sea and air transport vehicles, vehicles and steel structures.
【０００２】[0002]
【従来の技術】従来、航空機、自動車、および高速道路
架橋支柱のような大型構造物の点検には、打音検査、蛍
光探傷法による目視検査などの人的検査法が主流であ
る。また、形状の決まっている構造体には、超音波によ
る損傷検査及びアコースティックエミッション法による
損傷診断が用いられている。また、稼動中の構造体にお
ける点検では光ファイバの損傷診断機能を活用した光フ
ァイバ埋設法や圧電素子によるセンシング機能に着目し
た方法（例えば、特開平６−３０８０９９号公報参照）
が用いられている。2. Description of the Related Art Conventionally, a human inspection method such as a hammering sound inspection and a visual inspection by a fluorescent flaw detection method has been mainly used for inspecting large structures such as an aircraft, an automobile, and a highway bridge strut. Further, ultrasonic damage inspection and acoustic emission method damage diagnosis are used for a structure having a fixed shape. Further, in the inspection of the structure in operation, a method focusing on the optical fiber embedding method utilizing the optical fiber damage diagnosing function and the sensing function by the piezoelectric element (for example, refer to JP-A-6-308099).
Is used.
【０００３】打音検査、蛍光探傷法による目視検査など
の人的検査法は、熟練者の勘にたよるだけでなく検査場
所および検査時間も限定されるという欠点がある。ま
た、超音波による損傷検査は、超音波の発信機・受信機
を材料の表面に沿って移動させながら検査するものであ
るから移動物体のようなものには適用出来ないものであ
る。また、アコースティックエミッション法による損傷
診断では、アコースティックエミッション波形解析技術
が材料内のクラックのミクロな進展を捕らえる技術であ
るため構造体に発生した損傷を数センチメートル単位で
把握するには情報量が大きく即時の検査には不適切であ
った。A human inspection method such as a hammering sound inspection and a visual inspection by a fluorescent flaw detection method has a drawback that not only the expert's intuition but also the inspection place and the inspection time are limited. Further, the damage inspection by ultrasonic waves is an inspection that is performed while moving an ultrasonic transmitter / receiver along the surface of a material, and therefore cannot be applied to a moving object. Also, in the damage diagnosis by the acoustic emission method, since the acoustic emission waveform analysis technology is a technology that catches the microscopic progress of cracks in the material, there is a large amount of information to grasp the damage generated in the structure in units of several centimeters. Not suitable for immediate examination.
【０００４】また、光ファイバ埋設法では、光ファイバ
自体が脆性材料であるため、構造体への過負荷や衝撃力
により光ファイバセンサが破断してしまうという欠点が
あった。また、圧電素子のセンシング機能に着目した特
開平６−３０８０９９号公報に示されたものでは、構造
体の両側面に発信用の圧電素子と受信用の圧電素子とを
押圧するようにしているため、装置が大型になり、ま
た、損傷形態標定などの定量的な欠陥評価を得るまでに
は至っていない。Further, the optical fiber embedding method has a drawback that the optical fiber itself is a brittle material, and therefore the optical fiber sensor is broken by an overload or impact force on the structure. Further, in the technique disclosed in Japanese Patent Laid-Open No. 6-308099, which focuses on the sensing function of the piezoelectric element, the transmitting piezoelectric element and the receiving piezoelectric element are pressed against both side surfaces of the structure. However, the size of the device has become large, and quantitative defect evaluation such as damage morphological orientation has not been obtained yet.
【０００５】このような問題を解消するために、本発明
者らは、先に、センサを構造体に埋め込むことなく、単
に構造体に貼り付けるだけで、損傷位置・損傷形態を正
確に把握できる非破壊検査手段、具体的には、樹脂製フ
ィルム上に複数の圧電素子を配置したセンシングシート
あるいは該センシングシートを複合材料に貼着したセン
シングシート複合体を被検査体である構造体に貼り付け
て使用することにより、損傷位置の標定精度と損傷形態
把握機能を有効に発揮させる損傷センシングシートを提
案した（特願２０００−３１１７８２）。この損傷セン
シングシートは、被検査体に貼り付けるだけで使用でき
るので、鉄骨構造体、車体などセンサを埋設できない構
造物や稼動している部材にも適用でき、構造体における
損傷を断続的あるいは継続的に把握することが可能とな
るといった利点を有するものである。だが、その後の本
発明者らの検討によれば、この損傷センシングシートは
樹脂フィルムの間に弾性波の発生と検知に少なくとも３
個以上の圧電素子が配置されているので、被検査体が凹
凸や歪みなどの複雑な形状の場合には、被検査体への取
り付けが難しく、また取り付けることができたとしても
その密着性に欠け、損傷波形を正確に検知できないとい
った問題が生じ、また、被検査体の歪み構造から応力集
中を受け、損傷センシングシートが破壊し易くなり、破
壊した場合には損傷センシングシート全体を交換しなけ
ればならないといった難点を包含することが判明した。In order to solve such a problem, the inventors of the present invention can accurately grasp the damaged position and the damaged form by simply attaching the sensor to the structure without embedding the sensor in the structure. Non-destructive inspection means, specifically, a sensing sheet in which a plurality of piezoelectric elements are arranged on a resin film or a sensing sheet composite in which the sensing sheets are attached to a composite material is attached to a structure that is an object to be inspected A damage sensing sheet has been proposed that effectively exhibits the localization accuracy of the damage position and the damage form grasping function by using the same (Japanese Patent Application No. 2000-311782). Since this damage sensing sheet can be used by simply pasting it on the object to be inspected, it can also be applied to steel frame structures, structures such as car bodies where sensors cannot be embedded and operating members, and damage to the structure can be intermittent or continuous. This has the advantage that it is possible to grasp the information. However, according to the study conducted by the present inventors after that, this damage sensing sheet has at least 3 to detect and generate an elastic wave between the resin films.
Since more than one piezoelectric element is arranged, it is difficult to attach to the inspected object if the inspected object has a complicated shape such as unevenness or distortion, and even if it can be attached, its adhesion Problems such as chipping and damage waveform cannot be detected accurately, and stress damage from the strained structure of the DUT makes the damage sensing sheet easy to break. If damaged, the entire damage sensing sheet must be replaced. It turned out to include the difficulty of having to do it.
【０００６】[0006]
【発明が解決しようとする課題】本発明は、かかる発明
の問題点を克服するためになされたものであり、被検査
体が複雑な形状の場合であっても簡単に取り付けことが
できると共にその密着性に優れ、しかも破壊した場合に
も簡便・廉価に交換可能で、優れた損傷位置の標定精度
と損傷形態把握機能を発揮する損傷センシングシートを
提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made in order to overcome the problems of the invention, and even if the object to be inspected has a complicated shape, it can be easily attached and An object of the present invention is to provide a damage sensing sheet that has excellent adhesion and can be replaced easily and inexpensively even if it is broken, and that exhibits excellent accuracy in locating a damaged position and a function of grasping a damage form.
【０００７】[0007]
【課題を解決するための手段】本発明者らは、上記課題
を達成するため、鋭意検討した結果、樹脂フィルム内に
弾性波の発生と検知を兼ねた一つの圧電素子を配置する
とこれらの課題が解決できることを見い出し本発明に到
達した。すなわち、本発明によれば、以下の発明が提供
される。
（１）圧電素子と電極回路を備えた樹脂フィルムからな
る損傷センシングシートであって、弾性波の発生と検知
を兼ねた一つの圧電素子を用いたことを特徴とする損傷
センシングシート。
（２）樹脂フィルム内に、一つの圧電素子を配置したこ
とを特徴とする上記（１）記載の損傷センシングシー
ト。
（３）一方の樹脂フィルムに圧電素子を配置し、他方の
樹脂フィルムに圧電素子と電極コネクターとを結ぶ電極
回路を配置し、これらの樹脂フィルムを貼着したことを
特徴とする上記（１）又は（２）に記載の損傷センシン
グシート。
（４）樹脂フィルムがポリイミド又はポリエーテルイミ
ドであることを特徴とする上記（１）乃至（４）何れか
に記載の損傷センシングシート。
（５）少なくとも一方の樹脂フィルムの外面側に粘着層
を形成し、その外面に保護層を設けたことを特徴とする
上記（１）乃至（４）何れかに記載の損傷センシングシ
ート。
（６）上記（１）乃至（５）何れかに記載の損傷センシ
ングシートを被検査体に埋設又は貼着したことを特徴と
する損傷センシングシート複合体。Means for Solving the Problems The inventors of the present invention have made extensive studies in order to achieve the above-mentioned objects, and as a result, if one piezoelectric element for generating and detecting elastic waves is arranged in a resin film, these problems will be solved. The present invention has been achieved by finding that the above can be solved. That is, according to the present invention, the following inventions are provided. (1) A damage sensing sheet comprising a resin film having a piezoelectric element and an electrode circuit, wherein the single piezoelectric element is used for both generation and detection of elastic waves. (2) The damage sensing sheet according to the above (1), wherein one piezoelectric element is arranged in the resin film. (3) A piezoelectric element is arranged on one resin film, an electrode circuit connecting the piezoelectric element and an electrode connector is arranged on the other resin film, and these resin films are adhered to each other. Alternatively, the damage sensing sheet according to (2). (4) The damage sensing sheet according to any one of (1) to (4) above, wherein the resin film is polyimide or polyetherimide. (5) The damage sensing sheet according to any one of (1) to (4) above, wherein an adhesive layer is formed on the outer surface side of at least one resin film, and a protective layer is provided on the outer surface thereof. (6) A damage-sensing sheet composite comprising the damage-sensing sheet according to any one of (1) to (5) above, which is embedded or attached to an object to be inspected.
【０００８】[0008]
【発明の実施の形態】本発明に係る損傷センシングシー
トを用いて、被検査体である構造体の損傷を検知するに
は、たとえば、これを被検査体である構造体に必要な数
だけ貼り付け若しくは埋設しておき、それぞれの損傷セ
ンシングシートに駆動電圧を印加して発振させ、発振に
伴って発生する弾性波を検出すればよい。この場合、検
出された弾性波の出力信号をプリアンプで増幅し、コン
ピュータで解析すれば被検査体である構造体内部の不連
続部分等を欠陥として検出することが可能となる。BEST MODE FOR CARRYING OUT THE INVENTION In order to detect damage to a structure which is an object to be inspected by using the damage sensing sheet according to the present invention, for example, a desired number of these are attached to the structure which is the object to be inspected. It may be attached or embedded, and a drive voltage may be applied to each damage sensing sheet to oscillate, and an elastic wave generated due to the oscillation may be detected. In this case, if the detected output signal of the elastic wave is amplified by the preamplifier and analyzed by the computer, it is possible to detect a discontinuous portion or the like inside the structure as the inspection object as a defect.
【０００９】また、予め既知の損傷状態におけるパルス
出力波形をデータベース化しておき、位置標定された部
位の損傷センジングシートの圧電素子に駆動電圧を印加
して発振させ、他の損傷センシングシートの圧電素子に
おける出力波形をモニタリングすることにより構造体の
劣化診断を行うこともできる。Further, a database of pulse output waveforms in a known damage state is prepared in advance, a drive voltage is applied to the piezoelectric element of the damage sensing sheet at the position-localized portion to cause oscillation, and the piezoelectric elements of other damage sensing sheets are oscillated. The deterioration of the structure can be diagnosed by monitoring the output waveform of the device.
【００１０】波形検出はできるだけ広範囲な検出面積を
得るために少なくとも３枚の損傷センシングシートは必
要であり、検出精度や損傷の位置標定のためにカバーす
る面積を考慮すると損傷センシングシートはできるだけ
多い方が有効であるが、計算時間が長くなるため３〜８
枚が妥当な数である。従って、本発明においては、損傷
センシングシートを少なくとも３枚を用い、これらのシ
ートを被検査体の所定部位に貼着若しくは埋設しておく
ことが必要である。Waveform detection requires at least three damage sensing sheets in order to obtain a detection area as wide as possible. Considering the detection accuracy and the area covered for damage localization, the damage sensing sheet should be as many as possible. Is effective, but the calculation time becomes long, so 3 ~ 8
The number is a reasonable number. Therefore, in the present invention, it is necessary to use at least three damage sensing sheets and to attach or embed these sheets in a predetermined portion of the inspection object.
【００１１】次に、本発明に係る損傷センシングシート
の代表例を図面に沿って説明する。図１は、樹脂フィル
ム内に、弾性波の発生と検知を兼ねた一つの圧電素子を
配置した損傷センシングシートの説明図である。図１に
おいて、１は圧電素子、２は電極回路、３は樹脂フィル
ム、３−１は電極コネクター接続部位である。一方の樹
脂フィルム３に圧電素子１と電極回路２を配置し、その
上面を他方の樹脂フィルム３覆った構成としている。Next, a typical example of the damage sensing sheet according to the present invention will be described with reference to the drawings. FIG. 1 is an explanatory diagram of a damage sensing sheet in which a single piezoelectric element for generating and detecting elastic waves is arranged in a resin film. In FIG. 1, 1 is a piezoelectric element, 2 is an electrode circuit, 3 is a resin film, and 3-1 is an electrode connector connection site. The piezoelectric element 1 and the electrode circuit 2 are arranged on one resin film 3, and the upper surface thereof is covered with the other resin film 3.
【００１２】図２は、図１の損傷センシングシートの具
体例の一つを示したものである。一方の樹脂フィルム３
の上面に圧電素子１を配置し、他方の樹脂フィルム３に
電極回路３をたとえば導電ペーストなどで印刷乾燥し
て、形成し、その後、圧電素子１が配置された面と電極
回路３が配置された面とが接合するようにして二つの樹
脂フィルムを貼り合わせたものである。このような構造
とすることにより、圧電素子１及び電極回路２は樹脂フ
ィルム３で覆われるため、外部の水分、塵芥等で汚染さ
れることがなく、また機能を損なうこともない。FIG. 2 shows one specific example of the damage sensing sheet of FIG. One resin film 3
Of the piezoelectric element 1 is disposed on the upper surface of the electrode, and the electrode circuit 3 is formed on the other resin film 3 by printing and drying with, for example, a conductive paste, and then the surface on which the piezoelectric element 1 is disposed and the electrode circuit 3 are disposed. The two resin films are bonded to each other so that the two surfaces are bonded to each other. With such a structure, since the piezoelectric element 1 and the electrode circuit 2 are covered with the resin film 3, the piezoelectric element 1 and the electrode circuit 2 are not contaminated by external moisture, dust, and the like, and the function is not impaired.
【００１３】図３は、図２の損傷センシングシートの樹
脂フィルム３の外面側に粘着層４を設け、その表面に保
護層５を貼着したものである。このものは、大量生産可
能で保管も容易であり、しかも、その使用にあたって
は、保護層５を粘着層４から剥がし、粘着層４を非検査
体である構造体の所定箇所に貼りつけるという簡便なも
のであるから、その取り扱い作業性の面からみて極めて
有利なものである。In FIG. 3, an adhesive layer 4 is provided on the outer surface side of the resin film 3 of the damage sensing sheet of FIG. 2, and a protective layer 5 is attached to the surface thereof. This product can be mass-produced and is easy to store, and in use, it is easy to peel off the protective layer 5 from the adhesive layer 4 and attach the adhesive layer 4 to a predetermined portion of the structure which is a non-inspection body. Therefore, it is extremely advantageous in terms of handling workability.
【００１４】更に、本発明の損傷センシングシートにお
いては、適宜箇所に圧電素子などの検出素子の破損や損
傷の防止のためのクッション層や中間層を、また本体の
耐久性を維持するために、クッション層や中間層を介し
て耐久層を設けることも可能である。このような耐久層
の材料としては、例えばガラス繊維系複合材料やカーボ
ン繊維系複合材料などの耐久材料が使用できる。Further, in the damage sensing sheet of the present invention, a cushion layer or an intermediate layer for preventing damage or damage to a detection element such as a piezoelectric element is provided at an appropriate place, and in order to maintain the durability of the main body, It is also possible to provide a durable layer via a cushion layer or an intermediate layer. As a material for such a durable layer, for example, a durable material such as a glass fiber-based composite material or a carbon fiber-based composite material can be used.
【００１５】[0015]
【実施例】以下、本発明を実施例により説明する。EXAMPLES The present invention will be described below with reference to examples.
【００１６】実施例１
図１に示される樹脂フィルム３−１間に電極コネクター
を取り付けた損傷センシングシートを作製した。圧電素
子としては、Sr2-xCaxNaNb5O15 （ 0.05＜x＜0.25）
を、樹脂フィルムとしてはポリイミド樹脂を用いた。電
極回路２は銅箔を樹脂フィルム３に貼着することにより
形成した。この損傷センシングシートを、図４に示され
るように、平板状の被検査体６の外面に等間隔に４枚
（７−１〜４）貼着した。まず、各損傷センシングシー
トの位置を検出するために、センシングシート７−１に
矩形パルスを駆動させセンシングシート７−２〜４でそ
の弾性波を測定する。ついで駆動させるセンシングシー
トを７−２〜４と順次切り替え個々に弾性波の測定を行
い、測定結果を解析することでセンシングシートの位置
の算出を行う。参考のため、図５に、センシングシート
７−１に矩形パルスを駆動させた場合に観測されるセン
シングシート７−２〜４の弾性波の測定結果を示す。こ
の被検査体４の表面にφ１０のスチール球を１０ｃｍの
高さから落下させ衝撃を加え、各シートに伝わる弾性波
をそれぞれ観測し、各シートに到達する弾性波の時間差
等を解析することで衝撃位置、衝撃エネルギーの評定し
た。図６に被検査体６の構造材料としてアクリル樹脂を
用いた場合の各シートに到達する弾性波の観測結果を示
す。Example 1 A damage sensing sheet was prepared in which an electrode connector was attached between the resin films 3-1 shown in FIG. As a piezoelectric element, Sr2-xCaxNaNb5O15 (0.05 <x <0.25)
Was used as the resin film. The electrode circuit 2 was formed by attaching a copper foil to the resin film 3. As shown in FIG. 4, four (7-1 to 4) of the damage sensing sheets were attached to the outer surface of the flat plate-like inspection object 6 at equal intervals. First, in order to detect the position of each damage sensing sheet, a rectangular pulse is driven on the sensing sheet 7-1 and the elastic waves are measured by the sensing sheets 7-2 to 7-4. Next, the sensing sheet to be driven is sequentially switched from 7-2 to 4, and the elastic wave is individually measured, and the position of the sensing sheet is calculated by analyzing the measurement result. For reference, FIG. 5 shows the measurement results of the elastic waves of the sensing sheets 7-2 to 7-4 observed when the sensing sheet 7-1 is driven with a rectangular pulse. By dropping a steel ball of φ10 from the height of 10 cm on the surface of this inspected object 4 and applying an impact, the elastic waves transmitted to each sheet are observed, and the time difference of the elastic waves reaching each sheet is analyzed. The impact position and impact energy were evaluated. FIG. 6 shows the observation results of elastic waves reaching each sheet when acrylic resin is used as the structural material of the inspection object 6.
【００１７】実施例２
実施例１において、被検査体６の材質をＣＦＲＰに代
え、損傷センシングシートを図７に示されるように、被
検査体４に所定間隔で４枚埋設した以外は実施例１と同
様に各シートに伝わる弾性波を観察した。その弾性波の
観測結果を図８に示す。Example 2 Example 1 is different from Example 1 except that the material of the object to be inspected 6 was changed to CFRP and four damage sensing sheets were embedded in the object to be inspected 4 at predetermined intervals as shown in FIG. The elastic wave transmitted to each sheet was observed in the same manner as in 1. The observation result of the elastic wave is shown in FIG.
【００１８】実施例３
実施例１において、損傷センシングシートを図９に示さ
れるような円柱状の被検査体に所定の間隔で４枚貼着し
た以外は実施例１と同様に各シートに伝わる弾性波を観
察した。その弾性波の観測結果を図１０に示す。Example 3 In the same manner as in Example 1, except that four damage-sensing sheets were attached to a column-shaped inspection object as shown in FIG. 9 at a predetermined interval in Example 1, and transmitted to each sheet. Elastic waves were observed. The observation result of the elastic wave is shown in FIG.
【００１９】[0019]
【発明の効果】本発明の損傷センシングシートは、被検
査体が複雑な形状の場合であっても簡単に取り付けこと
ができると共にその密着性に優れ、しかも破壊した場合
にも簡便・廉価に交換可能で、優れた損傷位置の標定精
度と損傷形態把握機能を発揮する。また、本発明に係る
損傷センシングシートは被検査体に貼り付けるだけで使
用できるので、鉄骨構造体、車体などセンサを埋設でき
ない構造物や稼動している部材にも適用でき、構造体に
おける損傷を断続的あるいは継続的に把握することが可
能となる。特に、本発明の損傷センシングシートは、被
検査体への取り付け作業性・密着性に優れているため、
円筒状、角柱状、楔状などの複雑な形状の被検査体に簡
単に取り付けることができ、また過負荷や衝撃により圧
電素子が仮に破壊した場合でも、その修復作業はシート
全体ではなく、相応するシート単体のみを交換するだけ
で完了するので、利便性の極めて高いものである。The damage sensing sheet of the present invention can be easily attached even when the object to be inspected has a complicated shape and has excellent adhesiveness, and even if it is broken, it can be replaced easily and inexpensively. It is possible and exerts excellent localization accuracy of damage location and damage shape grasping function. Further, since the damage sensing sheet according to the present invention can be used by simply attaching it to the object to be inspected, it can be applied to a structure such as a steel frame structure or a vehicle body in which the sensor cannot be embedded or a member in operation, and damage to the structure can be prevented. It becomes possible to grasp the information intermittently or continuously. In particular, since the damage sensing sheet of the present invention is excellent in workability and adhesion to the object to be inspected,
It can be easily attached to an inspected object with a complicated shape such as a cylindrical shape, prismatic shape, wedge shape, and even if the piezoelectric element is broken due to overload or impact, the restoration work is not the entire sheet, but the corresponding work. It is extremely convenient because it can be completed by exchanging only the single sheet.
【図１】本発明の代表的な損傷センシングシートの斜視
図である。FIG. 1 is a perspective view of a representative damage sensing sheet of the present invention.
【図２】本発明に係る代表的な損傷センシングシートの
具体例である。FIG. 2 is a specific example of a typical damage sensing sheet according to the present invention.
【図３】本発明に係る他の代表的な損傷センシングシー
トの具体例である。FIG. 3 is a specific example of another representative damage sensing sheet according to the present invention.
【図４】本発明の損傷センシングシートの代表的な使用
例の説明図である。FIG. 4 is an explanatory diagram of a typical usage example of the damage sensing sheet of the present invention.
【図５】図４の使用態様において、各損傷センシングシ
ートで検知される弾性波の観測グラフである。FIG. 5 is an observation graph of elastic waves detected by each damage sensing sheet in the use mode of FIG.
【図６】実施例１に係る損傷センシングシートによって
検知される弾性波の観測グラフである。FIG. 6 is an observation graph of elastic waves detected by the damage sensing sheet according to the first embodiment.
【図７】本発明の損傷センシングシートの他の代表的な
使用例の説明図である。FIG. 7 is an explanatory diagram of another typical usage example of the damage sensing sheet of the present invention.
【図８】実施例２に係る損傷センシングシートによって
検知される弾性波の観測グラフである。FIG. 8 is an observation graph of elastic waves detected by the damage sensing sheet according to the second embodiment.
【図９】本発明の損傷センシングシートの他の代表的な
使用例の説明図である。FIG. 9 is an explanatory diagram of another typical usage example of the damage sensing sheet of the present invention.
【図１０】実施例３に係る損傷センシングシートによっ
て検知される弾性波の観測グラフである。FIG. 10 is an observation graph of elastic waves detected by the damage sensing sheet according to the third embodiment.
１ 圧電素子 ２ 電極回路 ３ 樹脂フィルム ４ 粘着層 ５ 保護層 ６ 被検査体 ７−１〜４ 損傷センシングシート 1 Piezoelectric element 2-electrode circuit 3 resin film 4 Adhesive layer 5 protective layer 6 Inspected body 7-1-4 Damage sensing sheet
───────────────────────────────────────────────────── フロントページの続き (72)発明者 大石 竜太郎 茨城県つくば市東１−１−１ 独立行政法 人産業技術総合研究所つくばセンター内 (72)発明者 具 滋▲？▼ 茨城県つくば市東１−１−１ 独立行政法 人産業技術総合研究所つくばセンター内 Ｆターム(参考） 2G047 CA01 EA14 EA16 GA01 GA02 GB12 GB21 GB33 GB35 GB36 5D019 AA14 AA18 BB28 EE01 EE02 FF03 FF05 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Ryutaro Oishi 1-1-1 Higashi 1-1-1 Tsukuba City, Ibaraki Prefecture Inside the Tsukuba Center, National Institute of Advanced Industrial Science and Technology (72) Inventor Shigeru ▲? ▼ 1-1-1 Higashi 1-1-1 Tsukuba City, Ibaraki Prefecture Inside the Tsukuba Center, National Institute of Advanced Industrial Science and Technology F-term (reference) 2G047 CA01 EA14 EA16 GA01 GA02 GB12 GB21 GB33 GB35 GB36 5D019 AA14 AA18 BB28 EE01 EE02 FF03 FF05
Claims (6)
からなる損傷センシングシートであって、弾性波の発生
と検知を兼ねた一つの圧電素子を用いたことを特徴とす
る損傷センシングシート。1. A damage sensing sheet comprising a resin film having a piezoelectric element and an electrode circuit, wherein the single piezoelectric element is used for both generation and detection of elastic waves.
したことを特徴とする請求項１記載の損傷センシングシ
ート。2. The damage sensing sheet according to claim 1, wherein one piezoelectric element is arranged in the resin film.
他方の樹脂フィルムに圧電素子と電極コネクターとを結
ぶ電極回路を配置し、これらの樹脂フィルムを貼着した
ことを特徴とする請求項１又は２に記載の損傷センシン
グシート。3. A piezoelectric element is arranged on one of the resin films,
The damage sensing sheet according to claim 1 or 2, wherein an electrode circuit connecting the piezoelectric element and the electrode connector is arranged on the other resin film, and these resin films are attached.
ルイミドであることを特徴とする請求項１乃至４何れか
に記載の損傷センシングシート。4. The damage sensing sheet according to claim 1, wherein the resin film is polyimide or polyetherimide.
粘着層を形成し、その外面に保護層を設けたことを特徴
とする請求項１乃至４何れかに記載の損傷センシングシ
ート。5. The damage sensing sheet according to claim 1, wherein an adhesive layer is formed on the outer surface side of at least one of the resin films, and a protective layer is provided on the outer surface thereof.
ングシートを被検査体に埋設又は貼着したことを特徴と
する損傷センシングシート複合体。6. A damage-sensing sheet composite, comprising the damage-sensing sheet according to any one of claims 1 to 5 embedded or attached to an object to be inspected.
Priority Applications (1)
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|---|---|---|---|
| JP2001326533A JP3790813B2 (en) | 2001-10-24 | 2001-10-24 | Damage sensing sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001326533A JP3790813B2 (en) | 2001-10-24 | 2001-10-24 | Damage sensing sheet |
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| Publication Number | Publication Date |
|---|---|
| JP2003130857A true JP2003130857A (en) | 2003-05-08 |
| JP3790813B2 JP3790813B2 (en) | 2006-06-28 |
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|---|---|---|---|
| JP2001326533A Expired - Lifetime JP3790813B2 (en) | 2001-10-24 | 2001-10-24 | Damage sensing sheet |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007521490A (en) * | 2003-09-22 | 2007-08-02 | ヒョン−ユン，キム | Structural health monitor sensor and system |
| JP2010528566A (en) * | 2007-05-25 | 2010-08-19 | ザ・ボーイング・カンパニー | Structural health monitoring (SHM) transducer assembly and system |
| JP2012168193A (en) * | 2012-05-01 | 2012-09-06 | Kenji Sato | Wireless tag type sensor |
| US20190391098A1 (en) * | 2018-06-20 | 2019-12-26 | Hyundai Motor Company | Apparatus and method for detecting damage to vehicle |
| JP7449723B2 (en) | 2020-03-03 | 2024-03-14 | 三菱重工業株式会社 | Method of manufacturing a sound wave sensor and method of installing a sound wave sensor |
-
2001
- 2001-10-24 JP JP2001326533A patent/JP3790813B2/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007521490A (en) * | 2003-09-22 | 2007-08-02 | ヒョン−ユン，キム | Structural health monitor sensor and system |
| JP2010528566A (en) * | 2007-05-25 | 2010-08-19 | ザ・ボーイング・カンパニー | Structural health monitoring (SHM) transducer assembly and system |
| JP2012168193A (en) * | 2012-05-01 | 2012-09-06 | Kenji Sato | Wireless tag type sensor |
| US20190391098A1 (en) * | 2018-06-20 | 2019-12-26 | Hyundai Motor Company | Apparatus and method for detecting damage to vehicle |
| US10837932B2 (en) * | 2018-06-20 | 2020-11-17 | Hyundai Motor Company | Apparatus and method for detecting damage to vehicle |
| JP7449723B2 (en) | 2020-03-03 | 2024-03-14 | 三菱重工業株式会社 | Method of manufacturing a sound wave sensor and method of installing a sound wave sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3790813B2 (en) | 2006-06-28 |
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