JPH064317Y2 - Exciter for modal analysis - Google Patents
Exciter for modal analysisInfo
- Publication number
- JPH064317Y2 JPH064317Y2 JP1988025270U JP2527088U JPH064317Y2 JP H064317 Y2 JPH064317 Y2 JP H064317Y2 JP 1988025270 U JP1988025270 U JP 1988025270U JP 2527088 U JP2527088 U JP 2527088U JP H064317 Y2 JPH064317 Y2 JP H064317Y2
- Authority
- JP
- Japan
- Prior art keywords
- piezoelectric element
- protrusion
- measured
- modal analysis
- elastic body
- 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.)
- Expired - Lifetime
Links
- 238000004458 analytical method Methods 0.000 title claims description 11
- 239000000919 ceramic Substances 0.000 claims description 9
- 230000005284 excitation Effects 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000005060 rubber Substances 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 1
- 229920002323 Silicone foam Polymers 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 238000012916 structural analysis Methods 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案はモーダル解析・構造解析用の小形加振器に係
り、特に被測定物に外部発振器により掃引サイン加振、
ランダム加振、マルチサイン加振、またはバーストラン
ダム加振を付与して被測定物の伝達関数を高精度に測定
できるモーダル解析用加振器に関する。[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a small vibration exciter for modal analysis and structural analysis, and in particular, swept sine vibration by an external oscillator on an object to be measured,
The present invention relates to a modal analysis exciter capable of measuring a transfer function of an object to be measured with high accuracy by applying random excitation, multi-sign excitation, or burst random excitation.
一般に、被測定物に外部より加振力を与えて、該物体の
伝達関数を測定して固有周波数、固有関数の形状を知る
ことにより、装置の工作精度、材質等の品質検査を行
い、あるいは、往復機関や回転機などのように加振力の
スペクトルが局在している時、これに結合する物体の共
振周波数が加振力のスペクトルのピークと一致しないよ
う設計を行うための基礎データの収集等が行われている
（モーダル解析という）。Generally, by applying an exciting force to the object to be measured from the outside and measuring the transfer function of the object to know the natural frequency and the shape of the natural function, the quality inspection of the working accuracy of the device, the material, etc., or , When the excitation force spectrum is localized, such as in reciprocating engines and rotating machines, the basic data for designing so that the resonance frequency of the object coupled to it does not match the peak of the excitation force spectrum. Are being collected (called modal analysis).
従来のこの種の加振器としては、例えば加振本体に電磁
石を収めたゴムダイヤフラムを取付け、この加振本体を
被測定物にネジ類により固定し、加振本体に外部より加
振力を入力して被測定物を加振させ、通電した電磁石コ
イルより得られる加速度、荷重出力により被測定物の伝
達関数を測定できるものである。As a conventional exciter of this type, for example, a rubber diaphragm containing an electromagnet is attached to the vibrating body, the vibrating body is fixed to the object to be measured with screws, and the vibrating force is applied to the vibrating body from the outside. The transfer function of an object to be measured can be measured by inputting and vibrating the object to be measured, and outputting acceleration and load obtained from an energized electromagnet coil.
しかしながら上記従来例にあっては、電動形で比較的大
形になるため特にタービンブレード等のように取付け場
所が狭く複雑形状の被測定物の場合、取付けが不可能で
あり、また電磁石を使用しているので磁界を発生し、電
子回路部品類のモーダル解析に使用できないばかりでな
く、大形で重量が大であるためネジ類で被測定物に取付
ける必要があるという課題を残していた。However, in the above-mentioned conventional example, since it is an electric type and is relatively large, it is not possible to attach it especially to an object to be measured having a complicated shape such as a turbine blade which has a small installation place and uses an electromagnet. As a result, a magnetic field is generated, which cannot be used for modal analysis of electronic circuit parts, and it is also large and heavy, so that it is necessary to attach it to the object to be measured with screws.
本考案加振器は上記の課題を解決するため、図示のよう
にセラミックス系圧電素子１の一面に突起２を接着し、
この突起２を接着したセラミックス系圧電素子１を弾性
体３内に埋設してなる構成としたものである。In order to solve the above-mentioned problems, the vibrator of the present invention adheres a protrusion 2 to one surface of a ceramic-based piezoelectric element 1 as shown in the figure,
The ceramic-based piezoelectric element 1 to which the protrusion 2 is bonded is embedded in the elastic body 3.
本考案加振器は薄板状にできる圧電素子１を用いている
ので、薄型で小形軽量にできるため、本考案加振器を構
成する弾性体３の突起２側の面をタービンブレード等の
ように取付場所が狭く複雑形状をなす被測定物でも接着
により容易に取付けることができ、ネジ類を必要としな
い。本考案加振器を取付けた被測定物を加振すれば、突
起２より圧電素子１に振動が伝達され、この圧電素子１
より当該物体の伝達関数を電気信号として測定すること
ができるばかりでなく、測定時に磁界を発生しないの
で、電子回路部品類のモーダル解析にも適用できる。ま
た、圧電素子１に突起２を介して振動が伝達されるの
で、振動を面で受振する場合に比べて検出出力が一定と
なり、高精度の測定ができモーダ解析を容易にできる。Since the vibrating device of the present invention uses the piezoelectric element 1 which can be made into a thin plate, it can be made thin and small and lightweight. Therefore, the surface of the elastic body 3 constituting the vibrating device of the present invention on the side of the protrusion 2 is like a turbine blade. Even if the object to be measured has a small mounting space and has a complicated shape, it can be easily mounted by adhesion, and screws are not required. When the object to which the vibrator of the present invention is attached is vibrated, the vibration is transmitted from the protrusion 2 to the piezoelectric element 1.
Further, not only the transfer function of the object can be measured as an electric signal, but also a magnetic field is not generated during the measurement, so that it can be applied to a modal analysis of electronic circuit components. Further, since the vibration is transmitted to the piezoelectric element 1 via the protrusion 2, the detection output becomes constant as compared with the case where the vibration is received on the surface, and highly accurate measurement can be performed and the modal analysis can be facilitated.
以下図面に基づいて本考案加振器の一実施例を説明す
る。An embodiment of the vibration exciter of the present invention will be described below with reference to the drawings.
図中３は弾性体で、ゴム、軟質樹脂、発泡体等を用いる
ことができ、具体的には、天然ゴム、合成ゴム、シリコ
ンゴム、エチレン／α−オレフィン共重合体、エチレン
／酢酸ビニル共重合体、シリコンゴムあるいはこれ等の
発泡体を用いることができる。セラミックス系圧電素子
１の一面には突起２が接着され、この突起２を接着した
セラミックス系圧電素子１が弾性体３内に埋設されてい
る。In the figure, 3 is an elastic body, and rubber, soft resin, foam or the like can be used. Specifically, natural rubber, synthetic rubber, silicone rubber, ethylene / α-olefin copolymer, ethylene / vinyl acetate copolymer. Polymers, silicone rubbers or foams thereof can be used. A protrusion 2 is adhered to one surface of the ceramic piezoelectric element 1, and the ceramic piezoelectric element 1 to which the protrusion 2 is adhered is embedded in the elastic body 3.
突起２は、鉄、アルミ、銅等の金属、あるいはポリエス
テル、ポリアミド、ウレア樹脂等の硬質樹脂で形成し、
圧電素子１に接着される。The protrusion 2 is formed of a metal such as iron, aluminum, or copper, or a hard resin such as polyester, polyamide, or urea resin,
It is bonded to the piezoelectric element 1.
圧電素子１とこれに接着された突起２の埋設方法は、突
起２を接着した圧電素子１を弾性体３でモールドする
か、または突起２を有する圧電素子１に弾性体３を積層
する方法を採用すればよい。The method for embedding the piezoelectric element 1 and the protrusion 2 bonded to the piezoelectric element 1 is to mold the piezoelectric element 1 to which the protrusion 2 is bonded with an elastic body 3 or to laminate the elastic body 3 on the piezoelectric element 1 having the protrusion 2. You can use it.
突起２は、目的に応じてその先端を弾性体３の下面と一
致させるか、あるいは僅かに突出又は引込む状態に埋設
されるが、一般には、加振器を被測定物に接着したと
き、突起２の先端が若干の押圧力で被測定物に当接する
ように弾性体３の下面より若干突出するように埋設され
ている。Depending on the purpose, the projection 2 is embedded so that its tip is aligned with the lower surface of the elastic body 3 or slightly projected or retracted. Generally, when the vibrator is bonded to the object to be measured, the projection 2 is projected. The tip of 2 is embedded so as to slightly project from the lower surface of the elastic body 3 so as to contact the object to be measured with a slight pressing force.
セラミックス系圧電素子１としては、例えば圧電膜４の
両面に膜状電極5a,5bを形成し、これらの膜状電極5a,5b
に接続コード６のリードを接続したものである。As the ceramic-based piezoelectric element 1, for example, film electrodes 5a and 5b are formed on both surfaces of the piezoelectric film 4, and these film electrodes 5a and 5b are formed.
The lead of the connection cord 6 is connected to.
この実施例は被測定物に弾性体３の突起２側の面を感圧
接着剤（両面テープ）等により接着して取付けられる。
被測定物を加振することにより圧電素子１に突起２を介
して振動が伝達されるので、圧電素子１により当該物体
の伝達関数を電気信号として接続コード６を経て取出す
ことができる。In this embodiment, the surface of the elastic body 3 on the side of the protrusion 2 is attached to the object to be measured by pressure-sensitive adhesive (double-sided tape) or the like.
Since the vibration is transmitted to the piezoelectric element 1 through the protrusion 2 by vibrating the object to be measured, the piezoelectric element 1 can take out the transfer function of the object as an electric signal through the connection cord 6.
本考案によれば、薄板状にできる圧電素子１を用いてい
るので、薄型で小形軽量化にできるため、本考案加振器
を構成する弾性体３の突起２側の面をタービンブレード
等のように取付け場所が狭く複雑形成をなす被測定物で
も接着により容易に取り付けることができ、ネジ類を必
要としない。また本考案加振器を取付けた被測定物を加
振すれば、圧電素子１より当該物体の伝達関数を電気信
号として測定することができるばかりでなく、測定時に
磁界を発生しないので、電子回路部品類のモーダル解析
にも適用できる。According to the present invention, since the piezoelectric element 1 that can be formed into a thin plate is used, it is possible to reduce the thickness and the size and weight of the piezoelectric element 1. Even an object to be measured, which has a small mounting space and has a complicated structure, can be easily mounted by adhesion and does not require screws. Further, if the object to which the vibrator of the present invention is attached is vibrated, not only the transfer function of the object can be measured from the piezoelectric element 1 as an electric signal, but also a magnetic field is not generated during the measurement. It can also be applied to modal analysis of parts.
また、圧電素子１に突起２を介して振動が伝達されるの
で、加振部が点状となってモーダル解析が容易であり、
また振動を面で受振する場合に比べて検出出力が一定と
なり、高精度の測定ができモーダル解析を容易にでき
る。Further, since the vibration is transmitted to the piezoelectric element 1 through the protrusion 2, the vibrating portion has a dot shape, which facilitates modal analysis.
In addition, the detection output is more constant than when vibration is received on the surface, and highly accurate measurement is possible and modal analysis can be facilitated.
図面は本考案加振器の一実施例の構成を示す断面図であ
る。 １……セラミックス系圧電素子、２……突起、３……弾
性体。The drawing is a sectional view showing the construction of an embodiment of the vibrator of the present invention. 1 ... Ceramic-based piezoelectric element, 2 ... Protrusion, 3 ... Elastic body.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 実開 昭51−70575（ＪＰ，Ｕ) 実開 昭51−27175（ＪＰ，Ｕ) 実開 昭51−3379（ＪＰ，Ｕ) 実開 昭51−45506（ＪＰ，Ｕ) 実開 昭59−68231（ＪＰ，Ｕ) 実開 昭59−35834（ＪＰ，Ｕ) 振動工学ハンドブック編集委員会「振動 工学ハンドブック」第４版（昭和63年２月 10日発行），養賢堂、Ｐ275〜Ｐ278 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References Open 51-70575 (JP, U) Open 51-27175 (JP, U) Open 51-3379 (JP, U) Open 51- 45506 (JP, U) Actual development Sho 59-68231 (JP, U) Actual development Sho 59-35834 (JP, U) Vibration engineering handbook editorial committee "Vibration engineering handbook" 4th edition (February 10, 1988) Issued), Yokendo, P275-P278
Claims (1)
着し、その突起を接着したセラミックス系圧電素子を、
前記突起が略埋設する程度に弾性体内に埋設し、前記弾
性体を被解析物に取りつけて用いるモーダル解析用加振
器。1. A ceramic-based piezoelectric element in which a protrusion is bonded to one surface of a ceramic-based piezoelectric element, and the protrusion is bonded to the ceramic-based piezoelectric element.
A vibration exciter for modal analysis, which is embedded in an elastic body to the extent that the protrusion is substantially embedded, and the elastic body is attached to an object to be analyzed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988025270U JPH064317Y2 (en) | 1988-02-26 | 1988-02-26 | Exciter for modal analysis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988025270U JPH064317Y2 (en) | 1988-02-26 | 1988-02-26 | Exciter for modal analysis |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01128133U JPH01128133U (en) | 1989-09-01 |
| JPH064317Y2 true JPH064317Y2 (en) | 1994-02-02 |
Family
ID=31245860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988025270U Expired - Lifetime JPH064317Y2 (en) | 1988-02-26 | 1988-02-26 | Exciter for modal analysis |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH064317Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4379360B2 (en) * | 2005-03-22 | 2009-12-09 | 株式会社日立製作所 | Mechanical quantity measuring device |
| JP6390025B2 (en) * | 2014-05-21 | 2018-09-19 | 株式会社エスジオップ | High frequency vibration detector |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS513379U (en) * | 1974-06-25 | 1976-01-12 | ||
| JPS5127175U (en) * | 1974-08-19 | 1976-02-27 | ||
| JPS5636239Y2 (en) * | 1974-11-29 | 1981-08-26 | ||
| JPS5145506U (en) * | 1974-10-01 | 1976-04-03 | ||
| JPS5935834U (en) * | 1982-08-31 | 1984-03-06 | 株式会社テイエルブイ | Vibration meter |
| JPS5968231U (en) * | 1982-10-28 | 1984-05-09 | 三菱油化株式会社 | flexible transducer |
-
1988
- 1988-02-26 JP JP1988025270U patent/JPH064317Y2/en not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| 振動工学ハンドブック編集委員会「振動工学ハンドブック」第４版（昭和６３年２月１０日発行），養賢堂、Ｐ２７５〜Ｐ２７８ |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01128133U (en) | 1989-09-01 |
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