JP2003302294A - Cable type piezoelectric sensor - Google Patents
Cable type piezoelectric sensorInfo
- Publication number
- JP2003302294A JP2003302294A JP2002107605A JP2002107605A JP2003302294A JP 2003302294 A JP2003302294 A JP 2003302294A JP 2002107605 A JP2002107605 A JP 2002107605A JP 2002107605 A JP2002107605 A JP 2002107605A JP 2003302294 A JP2003302294 A JP 2003302294A
- Authority
- JP
- Japan
- Prior art keywords
- piezoelectric sensor
- cable
- electrode
- impedance conversion
- terminal portion
- 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】本発明はケーブル状圧電セン
サに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable-shaped piezoelectric sensor.
【０００２】[0002]
【従来の技術】従来、ケーブル状圧電センサは、図６に
示すように、ケーブル状圧電センサ１からの出力信号を
処理する評価回路２にケーブル状圧電センサ１を接続し
て使用していた。評価回路２はインピーダンス変換部や
フィルタ部、増幅部、判定部等を有する。そして、ケー
ブル状圧電センサ１は感度を損なわないよう柔軟性のあ
る弾性体３に配設して使用していた。具体的用途として
は、例えば、自動車の窓枠に配設し、パワーウィンドウ
の挟み込み防止用のセンサとして使用したり、移動体の
周囲に配設して衝突検知用のセンサとして使用されてい
た。2. Description of the Related Art Conventionally, as shown in FIG. 6, a cable-shaped piezoelectric sensor has been used by connecting the cable-shaped piezoelectric sensor 1 to an evaluation circuit 2 which processes an output signal from the cable-shaped piezoelectric sensor 1. The evaluation circuit 2 has an impedance conversion unit, a filter unit, an amplification unit, a determination unit, and the like. The cable-shaped piezoelectric sensor 1 is used by being arranged on the flexible elastic body 3 so as not to impair the sensitivity. As a specific application, for example, it is arranged in a window frame of an automobile and used as a sensor for preventing a power window from being caught, or is arranged around a moving body and used as a sensor for collision detection.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら前記従来
のケーブル状圧電センサでは、評価回路２の形状がケー
ブル状圧電センサ１の外径に対して大きいため、製品の
運送や窓枠等への実装の際に邪魔になったり、評価回路
２を何かに引っかけて損傷したりするといった取り扱い
上の課題があった。However, in the above-mentioned conventional cable-shaped piezoelectric sensor, since the shape of the evaluation circuit 2 is larger than the outer diameter of the cable-shaped piezoelectric sensor 1, the product can be transported or mounted on a window frame or the like. There is a problem in handling, such as being an obstacle during the process and being damaged by being caught by the evaluation circuit 2.
【０００４】また、実装上の制約からケーブル状圧電セ
ンサ１を評価回路２ごと弾性体３に配設したい場合があ
るが、前記従来のケーブル状圧電センサでは、評価回路
２の形状が大きいため、評価回路２が弾性体３に配設で
きないといった実装上の課題があった。In addition, it may be desirable to dispose the cable-shaped piezoelectric sensor 1 together with the evaluation circuit 2 on the elastic body 3 due to mounting restrictions. However, in the conventional cable-shaped piezoelectric sensor, the evaluation circuit 2 has a large shape. There is a mounting problem that the evaluation circuit 2 cannot be arranged on the elastic body 3.
【０００５】本発明は、前記従来の課題を解決するもの
で、取り扱いやすく、かつ、容易に実装可能なケーブル
状圧電センサを提供することを目的とする。The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a cable-shaped piezoelectric sensor that is easy to handle and can be easily mounted.
【０００６】[0006]
【課題を解決するための手段】本発明は前記課題を解決
するために、本発明のケーブル状圧電センサは、圧電セ
ンサの少なくとも一方の端部で芯電極と外側電極とに前
記圧電センサの外径以下の大きさのインピーダンス変換
手段を接続した端末部とを備えたもので、端末部の外径
を圧電センサの外径と同じ以下に出来る為、取り扱いや
すく、かつ、弾性体等へも容易に実装可能となる。In order to solve the above-mentioned problems, the present invention provides a cable-shaped piezoelectric sensor in which a core electrode and an outer electrode are provided outside at least one end of the piezoelectric sensor. It is equipped with a terminal part to which impedance conversion means of a size less than or equal to the diameter is connected.Because the outer diameter of the terminal part can be made equal to or less than the outer diameter of the piezoelectric sensor, it is easy to handle and easy to use as an elastic body. Can be implemented in.
【０００７】[0007]
【発明の実施の形態】請求項１に記載の発明は、圧電セ
ンサの少なくとも一方の端部で芯電極と外側電極とに前
記圧電センサの外径以下の大きさのインピーダンス変換
手段を接続した端末部とを備えたもので、端末部の外径
を圧電センサの外径と同じ以下に出来る為、取り扱いや
すく、かつ、弾性体等へも容易に実装可能となる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 is a terminal in which an impedance conversion means having a size equal to or smaller than the outer diameter of the piezoelectric sensor is connected to the core electrode and the outer electrode at at least one end of the piezoelectric sensor. Since the outer diameter of the terminal portion can be made equal to or smaller than the outer diameter of the piezoelectric sensor, it can be easily handled and can be easily mounted on an elastic body or the like.
【０００８】請求項２に記載の発明は、請求項１に記載
の端末部が、圧電センサの端部を固定するとともにイン
ピーダンス変換手段を配設した細幅状の基板を備えたも
ので、端末部の強度的な保持が可能となり、信頼性が向
上する。According to a second aspect of the present invention, the terminal section according to the first aspect is provided with a narrow-width substrate on which an end of the piezoelectric sensor is fixed and impedance conversion means is arranged. The strength of the part can be maintained, and the reliability is improved.
【０００９】請求項３に記載の発明は、請求項１または
２に記載の端末部が、圧電センサの端部及びインピーダ
ンス変換手段を被覆する被覆部を有したもので、端末部
の保護が可能となる。According to a third aspect of the present invention, the terminal portion according to the first or second aspect has a coating portion for coating the end portion of the piezoelectric sensor and the impedance conversion means, and the terminal portion can be protected. Becomes
【００１０】請求項４に記載の発明は、請求項１〜３の
いずれか１項に記載の端末部が、外側電極と導通した導
電体により覆われたもので、端末部への電気的ノイズの
影響を防止することが出来る。According to a fourth aspect of the present invention, the terminal portion according to any one of the first to third aspects is covered with a conductor that is electrically connected to the outer electrode. It is possible to prevent the influence of.
【００１１】請求項５に記載の発明は、請求項１〜４の
いずれか１項に記載のケーブル状圧電センサにおいて、
インピーダンス変換手段が接続された圧電センサの端部
と反対側の端部で芯電極と外側電極の間に抵抗体を接続
したもので、前記抵抗体にバイアス電圧を印加すること
により前記ケーブル状圧電センサの断線やショートを検
出することができる。According to a fifth aspect of the present invention, in the cable-shaped piezoelectric sensor according to any one of the first to fourth aspects,
A resistor is connected between the core electrode and the outer electrode at the end opposite to the end of the piezoelectric sensor to which the impedance conversion means is connected. The cable-shaped piezoelectric element is formed by applying a bias voltage to the resistor. It is possible to detect disconnection or short circuit of the sensor.
【００１２】請求項６に記載の発明は、請求項５に記載
の抵抗体が外側電極と導通した導電体により覆われたも
ので、抵抗体への電気的ノイズの影響を防止することが
出来る。According to a sixth aspect of the present invention, the resistor according to the fifth aspect is covered with a conductor that is electrically connected to the outer electrode, and the influence of electrical noise on the resistor can be prevented. .
【００１３】[0013]
【実施例】以下、本発明の実施例について図１〜５を用
いて説明する。EXAMPLES Examples of the present invention will be described below with reference to FIGS.
【００１４】（実施例１）図１は本発明の第１の実施例
におけるケーブル状圧電センサの外観図である。図１に
おいて、４は、内部にインピーダンス変換部５が配設さ
れた端末部、６は内部に抵抗体７が配設された端部、８
は３芯のリード線である。(Embodiment 1) FIG. 1 is an external view of a cable-shaped piezoelectric sensor according to a first embodiment of the present invention. In FIG. 1, 4 is a terminal portion in which the impedance conversion portion 5 is arranged, 6 is an end portion in which the resistor 7 is arranged, 8
Is a three-core lead wire.
【００１５】図２に端末部４の構成と端末部４の加工手
順を示す。図２に示すように、端末部４は、内部電極を
形成する可撓性の芯電極９の表面に可撓性複合圧電体層
１０を形成し、この可撓性複合圧電体層１０の表面を被
覆し外側電極を形成する導電性テープ１１と、更にその
周囲に保護被覆層１２を成形し構成される。FIG. 2 shows the construction of the terminal portion 4 and the processing procedure of the terminal portion 4. As shown in FIG. 2, in the terminal portion 4, the flexible composite piezoelectric layer 10 is formed on the surface of the flexible core electrode 9 forming the internal electrode, and the surface of the flexible composite piezoelectric layer 10 is formed. And a protective coating layer 12 are formed around the conductive tape 11 which covers the outer surface of the conductive tape 11.
【００１６】芯電極９としてコイル状金属線や金属細線
を束ねた線などが用いることができ、本実施例では外径
０．３ｍｍのステンレス撚り線を使用している。As the core electrode 9, a coiled metal wire or a wire in which thin metal wires are bundled can be used. In this embodiment, a stainless stranded wire having an outer diameter of 0.3 mm is used.
【００１７】可撓性複合圧電体層１０としてエポキシ樹
脂、ウレタン樹脂、クロロプレン樹脂、塩素化ポリエチ
レン樹脂などの高分子母材に、チタン酸ジルコン酸鉛な
どのセラミック圧電体粉末を添加した複合圧電体や、Ｐ
ＶＤＦなどの高分子圧電体が用いられ、本実施例では外
径１．７ｍｍに被覆成形している。As the flexible composite piezoelectric layer 10, a composite piezoelectric body obtained by adding a ceramic piezoelectric powder such as lead zirconate titanate to a polymer base material such as an epoxy resin, a urethane resin, a chloroprene resin or a chlorinated polyethylene resin. Or P
A polymer piezoelectric material such as VDF is used, and in the present embodiment, the outer diameter is 1.7 mm, which is formed by coating.
【００１８】導電性テープ１１として銅箔、アルミニウ
ム箔、アルミを蒸着したＰＥＴフィルムなどが用いられ
本実施例では巾３ｍｍのＡｌ−ＰＥＴ−Ａｌ３層ラミネ
ートフィルムを螺旋状に巻いている。保護被覆層７とし
て塩化ビニル、フッ素樹脂、ポリウレタンなどが用いら
れ本実施例では塩化ビニルを外径２．５ｍｍに被覆成形
している。As the conductive tape 11, a copper foil, an aluminum foil, a PET film obtained by vapor deposition of aluminum, or the like is used. In this embodiment, an Al-PET-Al three-layer laminate film having a width of 3 mm is spirally wound. Vinyl chloride, fluororesin, polyurethane, or the like is used as the protective coating layer 7, and in this embodiment, vinyl chloride is formed by coating to have an outer diameter of 2.5 mm.
【００１９】端末部４は、ケーブル状圧電センサの端部
を固定するとともにインピーダンス変換部５を配設した
細幅状の基板１３を備えている。導電性テープ１１は基
板１３のグランド（図示せず）と導通している。具体的
には、導電性テープ１１とグランドとが図２のＰ位置で
クリップ部材やカシメ部材により圧着されて導通を図っ
ている。芯線９は例えばハンダ付けにより基板１３上に
接続される。The terminal portion 4 is provided with a narrow substrate 13 for fixing the end portion of the cable-shaped piezoelectric sensor and arranging the impedance conversion portion 5. The conductive tape 11 is electrically connected to the ground (not shown) of the substrate 13. Specifically, the conductive tape 11 and the ground are pressed at a position P in FIG. 2 by a clip member or a caulking member to achieve conduction. The core wire 9 is connected to the substrate 13 by soldering, for example.
【００２０】端末部４は、ケーブル状圧電センサの端部
及びインピーダンス変換部５を被覆する被覆部１４を有
している。被覆部１４は例えば熱収縮チューブで構成さ
れ、図２に示すように、基板１３を挿入した後に加熱し
て収縮、固定される。そして、その上をさらに外側電極
１１と導通した導電体１５により覆われる。導電体１５
は金属テープ等を使えば良いが、望ましくは導電性のあ
る熱収縮チューブを使用する。外側電極１１と導電体１
５との導通は、例えばＱ位置で導電体１５の上からカシ
メ部材を用いてカシメにより行うが、他の構成で導通を
図っても良い。The terminal portion 4 has a coating portion 14 for coating the end portion of the cable-shaped piezoelectric sensor and the impedance conversion portion 5. The covering portion 14 is composed of, for example, a heat shrink tube, and as shown in FIG. 2, after the substrate 13 is inserted, it is heated to shrink and be fixed. Then, the upper part thereof is further covered with the conductor 15 which is electrically connected to the outer electrode 11. Conductor 15
A metal tape or the like may be used, but a heat-shrinkable tube having conductivity is preferably used. Outer electrode 11 and conductor 1
Conduction with 5 is performed by caulking using a caulking member from above the conductor 15 at the Q position, for example, but conduction may be achieved with other configurations.
【００２１】図３に端部６の構成と端部の加工手順を示
す。図３に示すように、抵抗体７の長軸方向を芯電極９
と同軸方向に合わせ、圧電センサに近い側のリード線１
６ａを芯電極９に接続し、反対側でリード線１６ｂを折
り返して導電性テープ１１に接続する。これにより、保
護被覆層１２の外径よりも小さくなりかつリード線１６
ａと芯電極９の電気的露出部が少なくなるように抵抗体
７が配置されている。抵抗体７は外径が保護被覆層１１
よりも小さければチップ抵抗、リード線付き抵抗等どれ
でも良く、本実施例ではリード線が一体となっている１
／４Ｗリード線付き被膜抵抗を用いている。FIG. 3 shows the structure of the end portion 6 and the processing procedure of the end portion. As shown in FIG. 3, the long axis direction of the resistor 7 is set to the core electrode 9
Align the wire coaxially with the lead wire 1 near the piezoelectric sensor
6a is connected to the core electrode 9, and the lead wire 16b is folded back on the opposite side and connected to the conductive tape 11. As a result, the outer diameter of the protective coating layer 12 becomes smaller and the lead wire 16
The resistor 7 is arranged so that the electrically exposed portions of a and the core electrode 9 are reduced. The outer diameter of the resistor 7 is the protective coating layer 11
If it is smaller than the above, any of a chip resistance, a resistance with a lead wire, etc. may be used.
A film resistance with a / 4 W lead wire is used.
【００２２】リード線１６ａと芯電極９の接続は溶接、
ろう接、カシメなどが用いられ、リード線１６ｂと導電
性テープ１１の接続は溶接、ろう接、カシメなどが用い
られることにより電気的に接続される。リード線１６ｂ
の表面にはリード線１６ａとの短絡を防ぐために絶縁被
覆１７を形成している。絶縁被覆１７には塩化ビニル、
フッ素樹脂、ポリウレタンなどが用いられる。絶縁被覆
１７はリード線１６ａの側に成形しても良い。The lead wire 16a and the core electrode 9 are connected by welding,
Brazing, caulking, or the like is used, and the lead wire 16b and the conductive tape 11 are electrically connected by using welding, brazing, caulking, or the like. Lead wire 16b
An insulating coating 17 is formed on the surface of the in order to prevent short circuit with the lead wire 16a. Vinyl chloride is used for the insulation coating 17,
Fluororesin, polyurethane, etc. are used. The insulating coating 17 may be formed on the lead wire 16a side.
【００２３】最後に抵抗体７を保護するために熱収縮チ
ューブ１８を周囲に配置する。熱収縮チューブ１８は絶
縁体ならばエポキシ、シリコン、ホットメルトなどで代
用しても良い。Finally, a heat-shrink tube 18 is arranged around the resistor 7 to protect the resistor 7. The heat shrinkable tube 18 may be replaced with epoxy, silicon, hot melt or the like as long as it is an insulator.
【００２４】図４にインピーダンス変換手段５の回路を
示す。図中、Ｐｓは圧電センサ、Ｒ１は断線検出用の抵
抗体７で圧電センサの電極間に接続されている。Ｒ１は
他の抵抗Ｒ２を介して電源Ｖｄと接続されている。Ｒ
３、Ｒ４は圧電センサからの信号導出用の抵抗、Ｑ１は
インピーダンス変換用のＦＥＴである。FIG. 4 shows a circuit of the impedance conversion means 5. In the figure, Ps is a piezoelectric sensor, and R1 is a resistor 7 for detecting disconnection, which is connected between the electrodes of the piezoelectric sensor. R1 is connected to the power supply Vd via another resistor R2. R
Reference numerals 3 and R4 are resistors for deriving a signal from the piezoelectric sensor, and Q1 is a FET for impedance conversion.
【００２５】断線検知用の抵抗Ｒ１は、例えば誤って刃
物でケーブル状圧電センサを切断してしまったような場
合に断線検出を行うために、信号処理回路と接続するの
と反対側の先端部に取付けられている。そして、信号処
理回路でＲ１、Ｒ２、Ｒ３とＶｄで形成される電圧値Ｖ
１をモニタすることにより断線検出を行う。The resistance R1 for detecting disconnection is provided at the tip end opposite to the one connected to the signal processing circuit in order to detect disconnection, for example, when the cable-shaped piezoelectric sensor is accidentally cut by a cutting tool. Installed on. Then, the voltage value V formed by R1, R2, R3 and Vd in the signal processing circuit
Disconnection is detected by monitoring 1.
【００２６】インピーダンス変換手段５からの出力信号
はリード線８により外部評価回路に入力され、そこで増
幅や濾波、判定等の処理が行われる。すなわち、インピ
ーダンス変換手段５により圧電センサからの信号が低イ
ンピーダンスに変換されるので、リード線８から導出さ
れる信号は強電界によるノイズの影響を受けにくくな
り、リード線８により任意の場所に出力信号を導出する
ことが出来る。The output signal from the impedance conversion means 5 is input to the external evaluation circuit by the lead wire 8 and is subjected to processing such as amplification, filtering and judgment. That is, since the signal from the piezoelectric sensor is converted into low impedance by the impedance conversion means 5, the signal derived from the lead wire 8 is less susceptible to noise due to the strong electric field, and is output to an arbitrary place by the lead wire 8. The signal can be derived.
【００２７】上記構成により、ケーブル状圧電センサの
端部で芯電極９と外側電極１１とに前記圧電センサの外
径以下の大きさのインピーダンス変換手段５を接続した
端末部４とを備えたので、端末部４の外径をケーブル状
圧電センサの外径と同じ以下に出来る為、邪魔になった
り引っ掛けて損傷するといったことがなく取り扱いやす
い。また、弾性体等へ圧電センサを配設する際には端末
部４ごと弾性体に配設でき、容易に実装可能となる。With the above structure, the cable-shaped piezoelectric sensor is provided with the terminal portion 4 having the core electrode 9 and the outer electrode 11 connected to the impedance conversion means 5 having a size equal to or smaller than the outer diameter of the piezoelectric sensor. Since the outer diameter of the terminal portion 4 can be made equal to or smaller than the outer diameter of the cable-shaped piezoelectric sensor, it is easy to handle without being disturbed or damaged by being caught. Further, when the piezoelectric sensor is arranged on the elastic body or the like, it can be arranged on the elastic body together with the terminal portion 4, and can be easily mounted.
【００２８】また、端末部４が、ケーブル状圧電センサ
の端部を固定するとともにインピーダンス変換手段５を
配設した細幅状の基板１３を備えたもので、端末部４の
強度的な保持が可能となり、信頼性が向上する。Further, the terminal portion 4 is provided with a narrow-width substrate 13 for fixing the end portion of the cable-shaped piezoelectric sensor and arranging the impedance conversion means 5, so that the terminal portion 4 can be strongly retained. It is possible and reliability is improved.
【００２９】また、端末部４が、圧電センサの端部及び
インピーダンス変換手段５を被覆する被覆部１５を有し
たもので、端末部４の保護が可能となる。Further, since the terminal portion 4 has the covering portion 15 for covering the end portion of the piezoelectric sensor and the impedance conversion means 5, the terminal portion 4 can be protected.
【００３０】また、端末部４が、外側電極１１と導通し
た導電体１５により覆われたもので、端末部４への電気
的ノイズの影響を防止することが出来る。Since the terminal portion 4 is covered with the conductor 15 which is electrically connected to the outer electrode 11, the influence of electrical noise on the terminal portion 4 can be prevented.
【００３１】また、ケーブル状圧電センサにおいて、イ
ンピーダンス変換手段５が接続された圧電センサの端部
と反対側の端部で芯電極９と外側電極１１の間に抵抗体
７を接続したもので、抵抗体７にバイアス電圧を印加す
ることによりケーブル状圧電センサの断線やショートを
検出することができる。In the cable-shaped piezoelectric sensor, the resistor 7 is connected between the core electrode 9 and the outer electrode 11 at the end opposite to the end of the piezoelectric sensor to which the impedance conversion means 5 is connected. By applying a bias voltage to the resistor 7, it is possible to detect disconnection or short circuit of the cable-shaped piezoelectric sensor.
【００３２】尚、抵抗体５を外側電極１１と導通した導
電体により覆ってもよく、抵抗体５への電気的ノイズの
影響を防止することが出来る。The resistor 5 may be covered with a conductor that is electrically connected to the outer electrode 11, and the influence of electrical noise on the resistor 5 can be prevented.
【００３３】また、上記実施例では、基板１３にインピ
ーダンス変換手段５を配設した構成であったが、用途に
応じ、また、実装上の制約が許せば、インピーダンス変
換手段５からの出力信号を増幅する増幅部やフィルタ
部、判定部等も基板１３上に配設した構成としてもよ
く、電気的ノイズの影響をさらに受けにくくすることが
でき、信頼性が向上する。Although the impedance converting means 5 is arranged on the substrate 13 in the above embodiment, the output signal from the impedance converting means 5 may be changed depending on the application and if the mounting restrictions allow. The amplifying unit, the filter unit, the determining unit, and the like for amplification may be arranged on the substrate 13, so that the influence of electrical noise can be further reduced and the reliability is improved.
【００３４】また、図５に示すように、熱収縮チューブ
からなる被覆部１４に基板１３を挿入して被覆部１４を
加熱し、熱収縮チューブを収縮させて固定した後、リー
ド線８の貫通孔２０を有した金属性のキャップ部２１で
端末部４を覆う構成としてもよく、端末部４の強度が向
上する。Further, as shown in FIG. 5, the substrate 13 is inserted into the coating portion 14 made of a heat shrinkable tube to heat the coating portion 14 to shrink and fix the heat shrinkable tube, and then the lead wire 8 is penetrated. The terminal portion 4 may be covered with the metallic cap portion 21 having the holes 20, and the strength of the terminal portion 4 is improved.
【００３５】尚、この構成の場合、Ｒのように複合圧電
体層１０に巻かれた導電性テープ１１を一部剥がして保
護被覆層１２の端部に巻きつけ、キャップ部２１をケー
ブル状圧電センサの端部Ｒにはめ込んだ際に、Ｒの位置
で導電性テープ１１とキャップ部２１とが接触すること
により導通を図っている。Ｒ位置でキャップ部２１にカ
シメを行ってさらに導通の信頼性を向上する構成として
もよい。In this structure, the conductive tape 11 wound around the composite piezoelectric layer 10 as shown by R is partly peeled off and wound around the end of the protective coating layer 12, and the cap portion 21 is connected to the cable-shaped piezoelectric layer. When fitted into the end portion R of the sensor, the conductive tape 11 and the cap portion 21 come into contact with each other at the position of R to establish conduction. The cap portion 21 may be crimped at the R position to further improve the reliability of conduction.
【００３６】また、リード線８を少なくとも２芯のシー
ルド線としてもよい。この場合、シールド線のシールド
と基板１３のグランド及び外側電極としての導電性テー
プ１１とは導通させる。この構成により、電気的ノイズ
の影響をさらに受けにくくすることが可能となる。Further, the lead wire 8 may be a shield wire having at least two cores. In this case, the shield of the shield line is electrically connected to the ground of the substrate 13 and the conductive tape 11 as the outer electrode. With this configuration, it is possible to further reduce the influence of electrical noise.
【００３７】[0037]
【発明の効果】以上説明したように、本発明のケーブル
状圧電センサによれば、圧電センサの少なくとも一方の
端部で芯電極と外側電極とに前記圧電センサの外径以下
の大きさのインピーダンス変換手段を接続した端末部と
を備えたもので、端末部の外径を圧電センサの外径と同
じ以下に出来る為、取り扱いやすく、かつ、弾性体等へ
も容易に実装可能となる。As described above, according to the cable-shaped piezoelectric sensor of the present invention, the impedance of the core electrode and the outer electrode of at least one end of the piezoelectric sensor is equal to or smaller than the outer diameter of the piezoelectric sensor. Since the outer diameter of the terminal portion is equal to or smaller than the outer diameter of the piezoelectric sensor, the terminal portion to which the converting means is connected can be easily handled and easily mounted on the elastic body or the like.
【図１】本発明の実施例１におけるケーブル状圧電セン
サの構成を示す外観図FIG. 1 is an external view showing a configuration of a cable-shaped piezoelectric sensor according to a first embodiment of the present invention.
【図２】同実施例における端末部の構成を示す外観斜視
図FIG. 2 is an external perspective view showing a configuration of a terminal unit in the embodiment.
【図３】同実施例における端部の構成を示す外観斜視図FIG. 3 is an external perspective view showing a configuration of an end portion in the embodiment.
【図４】同実施例におけるインピーダンス変換手段の回
路図FIG. 4 is a circuit diagram of impedance conversion means in the embodiment.
【図５】他の実施例における端末部の構成を示す外観斜
視図FIG. 5 is an external perspective view showing the configuration of a terminal unit in another embodiment.
【図６】従来のケーブル状圧電センサの構成を示す外観
図FIG. 6 is an external view showing the configuration of a conventional cable-shaped piezoelectric sensor.
４ 端末部 ５ インピーダンス変換手段 ６ 端部 ７ 抵抗体 ９ 芯電極 １０ 可撓性複合圧電体層（圧電体） １１ 導電性テープ（外側電極） １４ 被覆部 １５ 導電体 4 Terminal 5 Impedance conversion means 6 edge 7 resistor 9-core electrode 10 Flexible composite piezoelectric layer (piezoelectric) 11 Conductive tape (outer electrode) 14 Cover 15 conductor
フロントページの続き (72)発明者 杉森 透 大阪府門真市大字門真1006番地 松下電器 産業株式会社内Continued front page (72) Inventor Toru Sugimori 1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric Sangyo Co., Ltd.
Claims (6)
た圧電体と、前記圧電体の周囲に配設された外側電極と
を備えたケーブル状の圧電センサにおいて、前記圧電セ
ンサの少なくとも一方の端部で前記芯電極と前記外側電
極とに前記圧電センサの外径以下の大きさのインピーダ
ンス変換手段を接続した端末部とを備えてなるケーブル
状圧電センサ。1. A cable-shaped piezoelectric sensor, comprising: a core electrode; a piezoelectric body arranged around the core electrode; and an outer electrode arranged around the piezoelectric body. A cable-shaped piezoelectric sensor comprising at least one end of the core electrode and the outer electrode, and a terminal portion in which impedance conversion means having a size equal to or smaller than the outer diameter of the piezoelectric sensor is connected.
とともにインピーダンス変換手段を配設した細幅状の基
板を備えた請求項１記載のケーブル状圧電センサ。2. The cable-shaped piezoelectric sensor according to claim 1, wherein the terminal portion includes a narrow-width substrate on which an end portion of the piezoelectric sensor is fixed and impedance conversion means is arranged.
ーダンス変換手段を被覆する被覆部を有した請求項１ま
たは２記載のケーブル状圧電センサ。3. The cable-shaped piezoelectric sensor according to claim 1, wherein the terminal portion has a coating portion that coats the end portion of the piezoelectric sensor and the impedance conversion means.
より覆われた請求項１〜３のいずれか１項記載のケーブ
ル状圧電センサ。4. The cable-shaped piezoelectric sensor according to claim 1, wherein the terminal portion is covered with a conductor that is electrically connected to the outer electrode.
電センサの端部と反対側の端部で芯電極と外側電極の間
に抵抗体を接続した請求項１〜４のいずれか１項記載の
ケーブル状圧電センサ。5. The cable according to claim 1, wherein a resistor is connected between the core electrode and the outer electrode at the end opposite to the end of the piezoelectric sensor to which the impedance conversion means is connected. Piezoelectric sensor.
り覆われた請求項５記載のケーブル状圧電センサ。6. The cable-shaped piezoelectric sensor according to claim 5, wherein the resistor is covered with a conductor that is electrically connected to the outer electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002107605A JP3741074B2 (en) | 2002-04-10 | 2002-04-10 | Cable-shaped piezoelectric sensor and detection device including the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002107605A JP3741074B2 (en) | 2002-04-10 | 2002-04-10 | Cable-shaped piezoelectric sensor and detection device including the same |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2003302294A true JP2003302294A (en) | 2003-10-24 |
| JP2003302294A5 JP2003302294A5 (en) | 2005-03-17 |
| JP3741074B2 JP3741074B2 (en) | 2006-02-01 |
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ID=29391585
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002107605A Expired - Fee Related JP3741074B2 (en) | 2002-04-10 | 2002-04-10 | Cable-shaped piezoelectric sensor and detection device including the same |
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| JP (1) | JP3741074B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004065925A1 (en) * | 2003-01-24 | 2004-08-05 | Matsushita Electric Industrial Co., Ltd. | Pressure sensor, object detection device, opening/closing device, and method for producing the pressure sensor |
| WO2006028222A1 (en) * | 2004-09-10 | 2006-03-16 | Matsushita Electric Industrial Co., Ltd. | Vibration detecting sensor and pressure sensitive switch using cable-shaped piezoelectric element |
| JP2006144315A (en) * | 2004-11-17 | 2006-06-08 | Aisin Seiki Co Ltd | Contact detector |
| JP2008519971A (en) * | 2004-11-11 | 2008-06-12 | アイイーイー インターナショナル エレクトロニクス アンド エンジニアリング エス．エイ． | Vehicle collision recognition device |
| JP2012011760A (en) * | 2010-07-05 | 2012-01-19 | Canon Inc | Head substrate, recording head using the head substrate, and recorder using the recording head |
| KR101359416B1 (en) | 2012-02-10 | 2014-02-11 | 부경대학교 산학협력단 | Smart Interface Tube for Electro-mechanical Dynamic Strain-based Tension-Force Monitoring in Cable |
| WO2019043023A1 (en) * | 2017-08-31 | 2019-03-07 | Koninklijke Philips N.V. | Sensing guidewire with integrated proximal locking feature |
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2002
- 2002-04-10 JP JP2002107605A patent/JP3741074B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004065925A1 (en) * | 2003-01-24 | 2004-08-05 | Matsushita Electric Industrial Co., Ltd. | Pressure sensor, object detection device, opening/closing device, and method for producing the pressure sensor |
| WO2006028222A1 (en) * | 2004-09-10 | 2006-03-16 | Matsushita Electric Industrial Co., Ltd. | Vibration detecting sensor and pressure sensitive switch using cable-shaped piezoelectric element |
| JP2008519971A (en) * | 2004-11-11 | 2008-06-12 | アイイーイー インターナショナル エレクトロニクス アンド エンジニアリング エス．エイ． | Vehicle collision recognition device |
| JP2006144315A (en) * | 2004-11-17 | 2006-06-08 | Aisin Seiki Co Ltd | Contact detector |
| JP4735937B2 (en) * | 2004-11-17 | 2011-07-27 | アイシン精機株式会社 | Contact detection device |
| JP2012011760A (en) * | 2010-07-05 | 2012-01-19 | Canon Inc | Head substrate, recording head using the head substrate, and recorder using the recording head |
| KR101359416B1 (en) | 2012-02-10 | 2014-02-11 | 부경대학교 산학협력단 | Smart Interface Tube for Electro-mechanical Dynamic Strain-based Tension-Force Monitoring in Cable |
| WO2019043023A1 (en) * | 2017-08-31 | 2019-03-07 | Koninklijke Philips N.V. | Sensing guidewire with integrated proximal locking feature |
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| JP3741074B2 (en) | 2006-02-01 |
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