JP2014209059A - Sensor device for measuring vibration - Google Patents

Sensor device for measuring vibration Download PDF

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JP2014209059A
JP2014209059A JP2013085757A JP2013085757A JP2014209059A JP 2014209059 A JP2014209059 A JP 2014209059A JP 2013085757 A JP2013085757 A JP 2013085757A JP 2013085757 A JP2013085757 A JP 2013085757A JP 2014209059 A JP2014209059 A JP 2014209059A
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bobbin
yoke
sensor device
coil
vibration
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JP6009393B2 (en
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智 中田
Satoshi Nakata
智 中田
諭 山代
Satoshi Yamashiro
諭 山代
貴政 佐想
Takamasa Saso
貴政 佐想
和之 穐山
Kazuyuki Akiyama
和之 穐山
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups

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  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a sensor device for measuring vibration which is used for measuring vibration that a motor or the like generates, in which attachment of an object is easy, and the object can be strongly fixed even when an attachment surface is not smooth.SOLUTION: A sensor 1 is installed at the top part of a bobbin 3 for which a coil 2 is provided, yokes 4 are installed at projection parts 3B on both sides at an upper portion of the bobbin 3, and connection parts 4B between the bobbin 3 and the yokes 4 are formed. The yokes 4 are swingably installed for the bobbin 3 with the connection parts 4B as a fulcrum, and a bobbin bottom surface 3A and a yoke bottom surface 4A are tightly fastened to an object 20 by magnetization of the coil 2.

Description

この発明は、モータ等の発する不釣合を含む振動の測定に用いられる振動測定用センサ装置に関するもので、特に振動を測定すべき対象物への取り付け性を向上させた振動測定用センサ装置に係るものである。   The present invention relates to a vibration measurement sensor device used for measurement of vibration including unbalance generated by a motor or the like, and particularly relates to a vibration measurement sensor device having improved attachment to an object whose vibration is to be measured. It is.

従来の加速度センサの対象物への取り付けには、加速度センサ取り付け具の底部に装着されたマグネットの吸引力を利用したものや、接着剤による方法が用いられてきた。また、加速度センサを取り付けたアダプタと対象物間の隙間を真空吸引することでアダプタに加圧力を与えて対象物に取り付けを行う技術が示されている（例えば、特許文献１）。   For attaching the conventional acceleration sensor to the object, a method using an attractive force of a magnet attached to the bottom of the acceleration sensor attachment or a method using an adhesive has been used. In addition, a technique is shown in which a vacuum is applied to the gap between the adapter to which the acceleration sensor is attached and the object to apply pressure to the adapter to attach the object to the object (for example, Patent Document 1).

特開２０００−３５３６１号公報JP 2000-35361 A

しかしながら、上記マグネットを用いた加速度センサを取り付ける方法では、対象物が小型電気製品等、比較的軽量の場合、加速度センサを取り外すとき対象物が設置位置から移動したり転倒したりする恐れがあり、対象物をベースに固定するための余分な構成が必要であり、また、上記特許文献１のようにアダプタと対象物間の隙間を真空吸引する方法においては、対象物の取り付け面が滑らかである必要があるという問題点がある。   However, in the method of attaching the acceleration sensor using the magnet, if the object is relatively lightweight, such as a small electrical product, the object may move from the installation position or fall when the acceleration sensor is removed. An extra configuration for fixing the object to the base is necessary, and in the method of vacuum suctioning the gap between the adapter and the object as in Patent Document 1, the mounting surface of the object is smooth. There is a problem that it is necessary.

この発明は、上記のような課題を解決するためになされたものであって、対象物が比較的軽量であってもベースに固定する為の余分な構成物を必要とせず、また取り付け面が滑らかでない場合であっても対象物に確実に取り付けを可能とする振動測定用センサ装置を提供する。   The present invention has been made to solve the above-described problems, and does not require an extra component for fixing to the base even if the object is relatively light, and the mounting surface is Provided is a sensor device for vibration measurement that can be securely attached to an object even when it is not smooth.

この発明は振動測定用センサ装置であって、コイルが設けられた磁性体よりなるボビンと、このボビンの頂部にはセンサが設置されているとともに、該ボビンの上部両側の突出部に磁性体よりなるヨークが装着されて前記ヨークとの連結部が形成され、前記ヨークが前記連結部を支点として前記ボビンに対して揺動可能に装着され、前記コイルが励磁されることで前記ボビンの下面および前記ヨーク下面とが、磁性体を備えた対象物の表面に固着し、前記対象物の発生する振動を測定するものである。   The present invention is a vibration measuring sensor device, wherein a bobbin made of a magnetic body provided with a coil, a sensor is installed on the top of the bobbin, and a protrusion is formed on both sides of the upper part of the bobbin by a magnetic body. The yoke is mounted to form a connecting portion with the yoke, the yoke is swingably mounted with respect to the bobbin with the connecting portion as a fulcrum, and the coil is excited so that the lower surface of the bobbin and The yoke lower surface is fixed to the surface of an object provided with a magnetic body, and measures vibrations generated by the object.

この発明に係る振動測定用センサ装置は、上記のような構成を備えているので、振動が測定される対象物への取り付け、取り外しが容易となり、対象物を固定する為の余分な構成物を必要とせず、また取り付け面が滑らかでない場合でも対象物へ確実に、かつ強固に取り付けることができるという効果がある。   Since the vibration measurement sensor device according to the present invention has the above-described configuration, it can be easily attached to and detached from the object whose vibration is measured, and an extra structure for fixing the object is provided. There is an effect that it can be securely and firmly attached to an object even when the attachment surface is not smooth.

実施の形態１によるセンサ装置を示す断面図である。1 is a cross-sectional view showing a sensor device according to Embodiment 1. FIG. 実施の形態１によるセンサ装置を示す上面図である。1 is a top view showing a sensor device according to Embodiment 1. FIG. 実施の形態１による加速度センサを示す正面図である。1 is a front view showing an acceleration sensor according to Embodiment 1. FIG. 実施の形態１による加速度センサを示す下面図である。FIG. 3 is a bottom view showing the acceleration sensor according to the first embodiment. 実施の形態１によるボビンとヨークとの連結構造を説明する斜視図である。FIG. 3 is a perspective view illustrating a connection structure between a bobbin and a yoke according to the first embodiment. 実施の形態１によるコイル巻き時のボビンの正面図である。FIG. 3 is a front view of the bobbin during coil winding according to the first embodiment. 実施の形態１による大きな曲率の対象物にセンサ装置を取り付けた時の図である。It is a figure when a sensor apparatus is attached to the object of the big curvature by Embodiment 1. FIG. 実施の形態３によるセンサ装置を示す断面図である。FIG. 6 is a cross-sectional view showing a sensor device according to a third embodiment. 実施の形態３によるピン部を説明する模式図である。10 is a schematic diagram illustrating a pin portion according to Embodiment 3. FIG.

実施の形態１．
以下、この発明による振動測定用センサ装置を図に基づいて説明する。図１は実施の形態１による振動測定用センサ装置１００（以下、センサ装置１００と称呼する。）を示す後述する図２のＡ−Ａ線断面の断面図である。この実施の形態１によるセンサ１は加速度センサの例を示しており、このセンサ１は軟鋼等の磁性体のボビン３の頂部に取り付けネジ８とナット７によって固着され、ボビン下面３Ａは磁性体を備えた対象物２０に接する。コイル２はボビン３に塗装などの対地絶縁が施されて所要ターン数が巻き付けられている。ボビン３の両側に設けられた磁性体のヨーク４は、ピン５を中心として揺動回転しヨーク下面４Ａが磁性体の対象物２０の表面に接する。従ってこのセンサ装置１００を取り付ける対象物２０の表面形状がモータ等の円筒ヨーク状であっても、ヨーク４が揺動回転して表面形状に倣うよう密に取り付けることができる。前記コイル２はＤＣ電源６によって励磁される。上記センサ装置１００は、センサ１、コイル２、ボビン３、ヨーク４、ピン５、ナット７、取り付けネジ８が一体化されることによって構成されており、ＤＣ電源６はコイル２を励磁時に準備される。
センサ装置１００をモータやコンプレッサ等、円筒状外面をもつ対象物２０へ取り付けるには、まず、対象物２０の振動測定する所定の位置にセンサ装置１００を仮搭載する。この際ボビン３の両側に設けたヨーク４を揺動させて対象物２０の表面形状にヨーク下面４Ａが倣うように位置調整する。その後、ＤＣ電源６を用いてコイル２を励磁することにより、ボビン３、対象物２０、ヨーク４を通る磁気回路が形成され、センサ装置１００は対象物２０に固着される。この固着力は対象物２０の表面形状や材質等によりＤＣ電源６の出力電源値を制御することによって調整される。この状態でセンサ装置１００によって対象物２０の不釣合振動を含む振動が測定される。対象物２０からの取り外しはコイル２への励磁を停止することで行うことができる。このようにコイル２が設けられたボビン３と、このボビン３の両側に設けられたヨーク４とを備えたセンサ装置１００であるので、ボビン３、対象物２０、ヨーク４を通る磁気回路が形成され、この磁気回路における漏洩磁束量が少なく、かつ対象物２０の表面に倣うよう密にヨーク４が接触しているので、接触部位の面積が増加するとともに、センサ装置１００が対象物２０との間の吸着電磁力を、小型化された装置であっても有効にかつ大きく発生させることができる。従って対象物２０の振動測定が高精度に行うことができ、さらに振動数が高い場合であっても、対象物２０の振動に追従可能となり、センサ１はより広い周波数帯域の振動が測定可能となる。センサ装置１００を対象物２０に取り付け、取り外しのときには、コイル２に励磁を行っていなければ、吸着力が発生していないため、従来例のマグネットを用いた場合のように、軽量の対象物が治具に引き付けられて転倒するようなことが生じない。さらに励磁電流を調整することで吸着力を大きくし、より高周波領域の振動を可能としたり、対象物２０の剛性に合わせ吸着力の調整を行うことができる。また、コイル２の励磁にＤＣ電源６を用いているため、ＡＣ電源による励磁に比較して吸着力が一定であり、センサ装置１００を安定に取り付けることができ、ＡＣ電源では交番磁界によるセンサ装置１００に発生する微振動がセンサ１にノイズとして計測されることを防止している。しかしながら励磁電源は、必ずしもＤＣ電源６に限定されることなく、必要とする測定精度に合わせて選択してもよい。 Embodiment 1 FIG.
Hereinafter, a sensor device for vibration measurement according to the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view taken along the line AA of FIG. 2 to be described later showing a vibration measuring sensor device 100 (hereinafter referred to as the sensor device 100) according to the first embodiment. The sensor 1 according to the first embodiment is an example of an acceleration sensor. This sensor 1 is fixed to the top of a bobbin 3 made of a soft material such as mild steel by a mounting screw 8 and a nut 7, and the bobbin lower surface 3A is made of a magnetic material. It contacts the provided object 20. The coil 2 is provided with ground insulation such as painting on the bobbin 3 and the required number of turns is wound around it. The magnetic yoke 4 provided on both sides of the bobbin 3 swings and rotates about the pin 5 so that the yoke lower surface 4A is in contact with the surface of the magnetic object 20. Therefore, even if the surface shape of the object 20 to which the sensor device 100 is attached is a cylindrical yoke shape such as a motor, the yoke 4 can be closely attached so as to follow the surface shape by swinging and rotating. The coil 2 is excited by a DC power source 6. The sensor device 100 is configured by integrating the sensor 1, the coil 2, the bobbin 3, the yoke 4, the pin 5, the nut 7, and the mounting screw 8, and the DC power source 6 is prepared when the coil 2 is excited. The
In order to attach the sensor device 100 to the object 20 having a cylindrical outer surface such as a motor or a compressor, first, the sensor device 100 is temporarily mounted at a predetermined position where the vibration of the object 20 is measured. At this time, the yoke 4 provided on both sides of the bobbin 3 is swung to adjust the position so that the yoke lower surface 4A follows the surface shape of the object 20. Thereafter, the coil 2 is excited using the DC power source 6 to form a magnetic circuit passing through the bobbin 3, the object 20, and the yoke 4, and the sensor device 100 is fixed to the object 20. This adhering force is adjusted by controlling the output power value of the DC power source 6 according to the surface shape or material of the object 20. In this state, the sensor device 100 measures vibration including unbalance vibration of the object 20. Removal from the object 20 can be performed by stopping excitation of the coil 2. Since the sensor device 100 includes the bobbin 3 provided with the coil 2 and the yokes 4 provided on both sides of the bobbin 3, the magnetic circuit passing through the bobbin 3, the object 20, and the yoke 4 is formed. In addition, since the amount of leakage magnetic flux in the magnetic circuit is small and the yoke 4 is in close contact with the surface of the object 20, the area of the contact portion is increased and the sensor device 100 is connected to the object 20. Even in the case of a downsized apparatus, it is possible to effectively and greatly generate the electromagnetic electromagnetic force between them. Therefore, vibration measurement of the object 20 can be performed with high accuracy, and even when the vibration frequency is high, the vibration of the object 20 can be tracked, and the sensor 1 can measure vibration in a wider frequency band. Become. When the sensor device 100 is attached to and removed from the object 20, if the coil 2 is not excited, no attracting force is generated, so that a lightweight object is used as in the case of using a conventional magnet. It does not happen to fall over when it is attracted to the jig. Further, by adjusting the excitation current, the suction force can be increased to enable vibration in a higher frequency region, or the suction force can be adjusted in accordance with the rigidity of the object 20. Further, since the DC power source 6 is used for exciting the coil 2, the suction force is constant as compared with the excitation by the AC power source, and the sensor device 100 can be stably attached. The minute vibration generated in 100 is prevented from being measured as noise by the sensor 1. However, the excitation power source is not necessarily limited to the DC power source 6 and may be selected according to the required measurement accuracy.

図２は前述した図１のセンサ装置１００を上面から見た上面図であり、Ａ−Ａ線断面を前述した図１に示す。センサケーブル９は図示省略した外部の電源アンプに接続されており、センサ１で得られた対象物２０の振動の大きさを伝達する。コイル２のコイルリード線２ＡはＤＣ電源６に接続される。図３は図２に示すセンサ１の正面図であり、図４はセンサ１の底面図である。センサ１にはネジ穴１１が設けられ、このネジ穴１１に取り付けネジ８が挿入される。またセンサケーブル９を接続するための出力端子１０が側面に設けられている。図５はボビン３とヨーク４との連結構造を説明する斜視図でありボビン３の両側に設けられたヨーク４の内、片側のヨーク４のみを図示している。ボビン３は直方体をなし、上部には左右両側に突出した所定の厚さを有した突起部３Ｂが設けられており、ボビン下面３Ａの対象物２０と接する部位は八の字面が形成されており、また、このボビン３の下部にはひさし３Ｃが設けられ、コイル２の巻き付け時の崩れ止めの機能を有する。ボビン３の上面には取り付けネジ８を連結するためのネジ穴３Ｄが設けられ取り付けネジ８を介してセンサ１を取り付けることで図１に示した状態となる。突起部３Ｂの先端部分は円弧状になっているとともにピン挿入孔３Ｅが設けられている。ヨーク４の上部は鉤部４Ｆを有する鉤状をなし、ボビン３側に突出した前記鉤部４Ｆに構成される連結部４Ｂが設けられており、この連結部４Ｂには前述したボビン３の突起部３Ｂが揺動可能となるように密に挿入される連結溝４Ｃが、さらにピン挿入孔４Ｅが設けられている。前記連結部４Ｂのボビン３に対向して接触する先端部分は円弧状となっており、さらに連結溝４Ｃの底は突起部３Ｂと干渉しないよう相似の円弧状となっている。また連結部４Ｂの先端には回り止め部４Ｄが設けてある。このような形状のボビン３とヨーク４とは、ボビン３の突起部３Ｂをヨーク４の連結溝４Ｃに挿入、ヨーク４のピン挿入孔４Ｅ、ピン挿入孔３Ｅにピン５を挿入することによって組み立てられ、ボビン３に連結されたヨーク４はピン５を中心に揺動、回転可能となるが、回り止め部４Ｄによってヨーク４の下部がボビン３の下部に接触することを防止している。   FIG. 2 is a top view of the above-described sensor device 100 of FIG. 1 as viewed from above, and a cross section taken along line AA is shown in FIG. The sensor cable 9 is connected to an external power amplifier (not shown) and transmits the magnitude of vibration of the object 20 obtained by the sensor 1. The coil lead wire 2 </ b> A of the coil 2 is connected to the DC power source 6. 3 is a front view of the sensor 1 shown in FIG. 2, and FIG. 4 is a bottom view of the sensor 1. A screw hole 11 is provided in the sensor 1, and a mounting screw 8 is inserted into the screw hole 11. An output terminal 10 for connecting the sensor cable 9 is provided on the side surface. FIG. 5 is a perspective view illustrating a connection structure between the bobbin 3 and the yoke 4, and shows only one yoke 4 of the yokes 4 provided on both sides of the bobbin 3. The bobbin 3 has a rectangular parallelepiped shape, and is provided with a protrusion 3B having a predetermined thickness protruding on the left and right sides at the top, and a portion of the bobbin lower surface 3A in contact with the object 20 has an eight-shaped surface. In addition, an eaves 3C is provided in the lower part of the bobbin 3, and has a function of preventing collapse when the coil 2 is wound. A screw hole 3D for connecting the mounting screw 8 is provided on the upper surface of the bobbin 3, and the state shown in FIG. The tip portion of the protrusion 3B has an arc shape and is provided with a pin insertion hole 3E. The upper part of the yoke 4 has a hook shape having a hook part 4F, and a connecting part 4B configured to the hook part 4F protruding to the bobbin 3 side is provided, and the protrusion of the bobbin 3 described above is provided on the connecting part 4B. A connecting groove 4C that is closely inserted so that the portion 3B can swing is further provided with a pin insertion hole 4E. The tip portion of the connecting portion 4B facing the bobbin 3 is arcuate, and the bottom of the connecting groove 4C is a similar arc shape so as not to interfere with the protruding portion 3B. Further, a detent portion 4D is provided at the tip of the connecting portion 4B. The bobbin 3 and the yoke 4 having such a shape are assembled by inserting the protrusion 3B of the bobbin 3 into the connecting groove 4C of the yoke 4, and inserting the pin 5 into the pin insertion hole 4E and the pin insertion hole 3E of the yoke 4. The yoke 4 connected to the bobbin 3 can swing and rotate about the pin 5, but the rotation stopper 4 </ b> D prevents the lower part of the yoke 4 from contacting the lower part of the bobbin 3.

このようなセンサ装置１００は、ボビン３とヨーク４とが互いに蜜に接触する構成があるので、コイル２を励磁した際、形成される磁気回路の漏洩磁束を小さくすることができる。また、回り止め部４Ｄが設けられているので、ボビン３の下部とヨーク４の下部が接触することはなく、従ってボビン３→ヨーク４→対象物２０→ボビン３とする磁気回路が保たれ、センサ装置１００の対象物２０への吸着力を損なわれることはない。図６にボビン３にコイル２を巻線するときの正面図を示す。コイル２を巻線するときには、ヨーク４をボビン３の上部方向にほぼ９０度程度となるよう回転させる。このことによりヨーク４にコイル２の導線が干渉されることなく巻線可能となる。   Since such a sensor device 100 has a configuration in which the bobbin 3 and the yoke 4 are in contact with each other, when the coil 2 is excited, the leakage magnetic flux of the formed magnetic circuit can be reduced. Further, since the anti-rotation portion 4D is provided, the lower part of the bobbin 3 and the lower part of the yoke 4 do not come into contact with each other, so that the magnetic circuit of the bobbin 3 → the yoke 4 → the object 20 → the bobbin 3 is maintained. The suction force of the sensor device 100 on the object 20 is not impaired. FIG. 6 shows a front view when the coil 2 is wound around the bobbin 3. When winding the coil 2, the yoke 4 is rotated in the upper direction of the bobbin 3 so as to be approximately 90 degrees. As a result, the coil 4 can be wound without the interference of the conducting wire of the coil 2 with the yoke 4.

図７は図１と比較して大きな曲率つまり外径の大きな対象物２０にセンサ装置１００を取り付けたときの状態を示す図である。ヨーク４を揺動、回転させて対象物２０の取り付け面に倣うように接触させることで、ヨーク４と対象物２０間の隙間が小さくなり、ヨーク４と対象物２０との間の吸着力を大きくすることができ、大きな外径を有する対象物２０に対しても、流用可能な機能を備えており、さらには対象物２０の取り付け面が平面であっても流用可能である。またピン５を用いた構成であるが、ちょうつがいを用いてもよい。   FIG. 7 is a diagram showing a state when the sensor device 100 is attached to an object 20 having a larger curvature, that is, a larger outer diameter compared to FIG. By swinging and rotating the yoke 4 so as to follow the mounting surface of the object 20, the gap between the yoke 4 and the object 20 is reduced, and the adsorption force between the yoke 4 and the object 20 is increased. The object 20 can be enlarged and has a divertable function even for the object 20 having a large outer diameter. Furthermore, the object 20 can be diverted even if the mounting surface of the object 20 is a flat surface. Moreover, although it is the structure using the pin 5, you may use a hinge.

実施の形態２．
実施の形態１のボビン３、ヨーク４はソリッドの軟鋼等を用いる例を示したが、ソリッドに代替して薄板の電磁鋼板の積層構造であってもよい。この場合、磁気特性がさらに向上する。 Embodiment 2. FIG.
Although the bobbin 3 and the yoke 4 of the first embodiment have been illustrated using solid mild steel or the like, a laminated structure of thin electromagnetic steel sheets may be used instead of solid. In this case, the magnetic characteristics are further improved.

実施の形態３．
この実施の形態３は前述した実施の形態２の薄板鋼板の積層体構造をボビン３１とヨーク４１に採用した場合において、前述した実施の形態１で示したピン挿入孔３Ｅ、４Ｅとピン５に代替して、積層する薄板鋼板のそれぞれに凸部、凹部を設け、この凸部と凹部とを嵌め合わせることによって、ヨーク４１がボビン３１に対して揺動回転可能とするものである。図８に示すセンサ装置１００のボビン３１とヨーク４１のＰ−Ｐ線断面を図９に示す。この図９はピン部５１を説明するため模式的に示すものであり、図９に示すようにボビン３１はピン部凹５１Ａ、ピン部凸５１Ｂが設けられたボビン３１Ｂと、上記ピン部凹５１Ａ、ピン部凸５１Ｂが設けられてないボビン３１Ａで構成され、またヨーク４１はピン部凹５１Ａ、ピン部凸５１Ｂが設けられたヨーク４１Ａと、上記ピン部凹５１Ａ、ピン部凸５１Ｂが設けられてないヨーク４１Ｂとで構成されている。そしてボビン３１は前記ボビン３１Ａ、３１Ｂが交互に積層され、ヨーク４１も前記ヨーク４１Ａ、４１Ｂが交互に積層されるとともに、ヨーク４１Ａのピン部凸５１Ｂがボビン３１Ｂのピン部凹５１Ａに、ヨーク４１Ｂのピン部凸５１Ｂがヨーク４１Ａのピン部凹５１Ａに挿入されるよう積層されている。
このピン部５１が設けられることによって、ヨーク４１はボビン３１に対して揺動回転可能となる。 Embodiment 3 FIG.
In the third embodiment, when the laminated structure of the thin steel plates of the second embodiment described above is adopted for the bobbin 31 and the yoke 41, the pin insertion holes 3E and 4E and the pin 5 shown in the first embodiment are used. Instead, a convex portion and a concave portion are provided in each of the laminated steel sheets, and the yoke 41 can be rotated and rotated with respect to the bobbin 31 by fitting the convex portion and the concave portion. FIG. 9 shows a cross-sectional view of the bobbin 31 and the yoke 41 of the sensor device 100 shown in FIG. FIG. 9 schematically shows the pin portion 51. As shown in FIG. 9, the bobbin 31 has a pin portion recess 51A, a bobbin 31B provided with a pin portion protrusion 51B, and the pin portion recess 51A. The yoke 41 is provided with the pin 41 concave 51A, the yoke 41A provided with the pin convex 51B, the pin concave 51A, and the pin convex 51B. The yoke 41B is not formed. In the bobbin 31, the bobbins 31A and 31B are alternately stacked, and in the yoke 41, the yokes 41A and 41B are alternately stacked. The pin protrusion 51B is stacked so as to be inserted into the pin recess 51A of the yoke 41A.
By providing the pin portion 51, the yoke 41 can swing and rotate with respect to the bobbin 31.

尚、この発明は、その発明の範囲内において、各実施の形態を自由に組み合わせたり、各実施の形態を適宜、変形、省略することが可能である。   It should be noted that within the scope of the present invention, the embodiments can be freely combined, or the embodiments can be appropriately modified or omitted.

１ センサ、２ コイル、３ ボビン、３Ａ ボビン下面、３Ｂ 突起部、
４ ヨーク、４Ａ ヨーク下面、４Ｂ 連結部、４Ｃ 連結溝、４Ｄ 周り止め部、
３１ ボビン、４１ ヨーク、１００ 振動測定用センサ装置。 1 sensor, 2 coil, 3 bobbin, 3A bottom surface of bobbin, 3B protrusion,
4 yoke, 4A lower surface of yoke, 4B connecting part, 4C connecting groove, 4D detent part,
31 bobbin, 41 yoke, 100 sensor device for vibration measurement.

Claims (8)

振動測定用センサ装置であって、コイルが設けられた磁性体よりなるボビンと、このボビンの頂部にはセンサが設置されているとともに、該ボビンの上部両側の突出部に磁性体よりなるヨークが装着されて前記ヨークとの連結部が形成され、前記ヨークが前記連結部を支点として前記ボビンに対して揺動可能に装着され、前記コイルが励磁されることで前記ボビンの下面および前記ヨーク下面とが、磁性体を備えた対象物の表面に固着し、前記対象物の発生する振動を測定することを特徴とする振動測定用センサ装置。 A sensor device for vibration measurement, wherein a bobbin made of a magnetic body provided with a coil, a sensor is installed on the top of the bobbin, and yokes made of a magnetic body are formed on the protruding parts on both sides of the upper part of the bobbin. A connecting portion with the yoke is formed, and the yoke is swingably attached to the bobbin with the connecting portion as a fulcrum. When the coil is excited, the lower surface of the bobbin and the lower surface of the yoke Is fixed to the surface of an object provided with a magnetic body, and measures vibrations generated by the object. 前記ヨークは、鉤部を有する鉤状をなし、前記鉤部に設けられた溝に前記ボビンの前期突出部が挿入されることで前記連結部が形成され、該連結部には前記ヨークおよび前記ボビンを貫通するピンが設けられて、前記ヨークが前記ボビンに揺動可能に装着されることを特徴とする請求項１に記載の振動測定用センサ装置。 The yoke has a hook shape having a hook portion, and the connecting portion is formed by inserting the first protruding portion of the bobbin into a groove provided in the hook portion, and the connecting portion includes the yoke and the yoke. The vibration measuring sensor device according to claim 1, wherein a pin penetrating the bobbin is provided, and the yoke is swingably attached to the bobbin. 前記ボビンの突出部の先端および前記ボビンの突出部と対向する前記ヨークの前記鉤部の溝底は、円弧状に形成されていることを特徴とする請求項２に記載の振動測定用センサ装置。 The vibration measurement sensor device according to claim 2, wherein a tip of the protruding portion of the bobbin and a groove bottom of the flange portion of the yoke facing the protruding portion of the bobbin are formed in an arc shape. . 前記ボビンの下面は、八の字状に形成されていることを特徴とする請求項１から請求項３のいずれか１項に記載の振動測定用センサ装置。 The vibration measurement sensor device according to any one of claims 1 to 3, wherein a lower surface of the bobbin is formed in an eight-letter shape. 前記コイルへの励磁は、直流電源によってなされることを特徴とする請求項１から請求項４のいずれか１項に記載の振動測定用センサ装置。 5. The vibration measurement sensor device according to claim 1, wherein excitation of the coil is performed by a DC power source. 6. 前記センサは、加速度センサであることを特徴とする請求項１から請求項５のいずれか１項に記載の振動測定用センサ装置。 The vibration measurement sensor device according to claim 1, wherein the sensor is an acceleration sensor. 前記ボビンおよび前記ヨークは薄板鋼板の積層体であることを特徴とする請求項１から請求項６のいずれか１項に記載の振動測定用センサ装置。 The vibration measuring sensor device according to any one of claims 1 to 6, wherein the bobbin and the yoke are laminated bodies of thin steel plates. 前記ボビンおよび前記ヨークは薄板鋼板の積層体であるとともに、前記ボビンとヨークを貫通するピンに代替して、前記薄板鋼板に設けられたピン部凹にピン部凸が挿入されていることを特徴とする請求項２に記載の振動測定用センサ装置。 The bobbin and the yoke are laminates of thin steel plates, and a pin convex portion is inserted into a pin concave portion provided in the thin steel plate in place of a pin penetrating the bobbin and the yoke. The vibration measurement sensor device according to claim 2.
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