JPH0571968A - Vibration control device - Google Patents
Vibration control deviceInfo
- Publication number
- JPH0571968A JPH0571968A JP3262565A JP26256591A JPH0571968A JP H0571968 A JPH0571968 A JP H0571968A JP 3262565 A JP3262565 A JP 3262565A JP 26256591 A JP26256591 A JP 26256591A JP H0571968 A JPH0571968 A JP H0571968A
- Authority
- JP
- Japan
- Prior art keywords
- piezoelectric element
- vibrator
- output
- vibration control
- piezoelectric
- 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.)
- Pending
Links
Landscapes
- Gyroscopes (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、振動制御装置に関す
るものであり、たとえば、圧電形振動ジャイロに用い
て、振動子の安定した自励振動をもたらすものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration control device, and for example, it is used in a piezoelectric vibration gyro to provide stable self-excited vibration of a vibrator.
【０００２】[0002]
【従来の技術】圧電形振動ジャイロに用いられる従来の
振動制御装置としては、図３に例示するようなものがあ
る。この従来装置は、振動体１の一側面に、駆動用圧電
素子２および帰還用圧電素子３のそれぞれを貼着するこ
とによって振動子４を構成し、そして、駆動装置５の出
力を駆動用電圧素子２に直接的に供給するとともに、帰
還用圧電素子３の出力を、その駆動装置５に直接的に帰
還させることによって、振動子４に自励振動をもたらす
ように構成された振動制御装置となっている。2. Description of the Related Art As a conventional vibration control device used in a piezoelectric vibrating gyro, there is one as shown in FIG. In this conventional device, a vibrator 4 is configured by sticking a driving piezoelectric element 2 and a feedback piezoelectric element 3 to one side surface of a vibrating body 1, and the output of the driving device 5 is set to a driving voltage. A vibration control device configured to bring self-excited vibration to the vibrator 4 by directly feeding the output of the feedback piezoelectric element 3 to the driving device 5 while directly supplying it to the element 2. Is becoming
【０００３】[0003]
【発明が解決しようとする課題】ところで、かかる従来
装置にあっては、振動体１に、駆動用および帰還用の少
なくとも二枚の圧電素子２，３を貼着することが必要に
なるため、振動子４の組立て作業が面倒になるという問
題があり、また一方において、駆動用圧電素子２によっ
て発生された振動は、その圧電素子用の接着層６を経て
振動体１に伝達され、その後、帰還用圧電素子３のため
の接着層７を経て帰還出力をもたらすことから、それら
の両圧電素子２，３間の特性差や、それぞれの接着層
６，７の温度依存性その他の影響を受け易く、振動子４
の振動が不安定になるという問題もあった。この発明
は、従来技術のかかる問題を有利に解決するものであ
り、組立てが簡単で，しかも、振動子の常に安定した自
励振動をもたらすことができる振動制御装置を提供する
ものである。By the way, in such a conventional apparatus, it is necessary to attach at least two piezoelectric elements 2 and 3 for driving and returning to the vibrating body 1. There is a problem that the assembling work of the vibrator 4 becomes troublesome, and on the other hand, the vibration generated by the driving piezoelectric element 2 is transmitted to the vibrating body 1 via the adhesive layer 6 for the piezoelectric element, and thereafter, Since the feedback output is provided through the adhesive layer 7 for the feedback piezoelectric element 3, it is affected by the characteristic difference between the piezoelectric elements 2 and 3, the temperature dependence of the adhesive layers 6 and 7, and other influences. Easy, oscillator 4
There was also a problem that the vibration of the became unstable. The present invention advantageously solves the above problems of the prior art, and provides a vibration control device which is easy to assemble and which can always provide stable and self-excited vibration of a vibrator.
【０００４】[0004]
【課題を解決するための手段】この発明の振動制御装置
は、共振点を有する振動体の一側面に、一の圧電素子を
貼着して振動子を構成する一方、駆動装置を、容量素子
を介して前記圧電素子に接続するとともに、相互に直列
接続した抵抗素子にそれぞれ接続し、容量素子と圧電素
子との接続部の出力を、直列接続した抵抗素子間の接続
部の出力と差動して前記駆動装置に帰還させるものであ
り、より好ましくは、抵抗素子を可変抵抗器とし、容量
素子と圧電素子との接続部の出力を、可変抵抗器の可動
端子の出力と差動して前記駆動装置に帰還させる構成と
したものである。In the vibration control device of the present invention, one piezoelectric element is attached to one side surface of a vibrating body having a resonance point to form a vibrator, while the drive device is connected to the capacitive element. Connected to the above-mentioned piezoelectric element through a resistor element connected in series with each other, and the output of the connection section between the capacitive element and the piezoelectric element More preferably, the resistance element is a variable resistor, and the output of the connecting portion between the capacitance element and the piezoelectric element is differentiated from the output of the movable terminal of the variable resistor. The configuration is such that it is returned to the drive device.
【０００５】[0005]
【作用】圧電素子は、それに応力を加えると、ひずみを
発生するとともに、圧電効果の下で、応力に比例した電
気変位を発生し、また、それに電界を加えると、電気変
位を生じるとともに、逆圧電効果によって電界に比例し
たひずみを生じる。When a stress is applied to the piezoelectric element, the piezoelectric element generates strain and, under the piezoelectric effect, an electric displacement proportional to the stress is generated. The piezoelectric effect causes strain proportional to the electric field.
【０００６】従って、圧電素子に、容量素子を介して交
流電圧を印加すると、その圧電素子と容量素子との接続
部では、印加された交流電圧と、圧電素子のひずみに伴
って発生する電圧との合成された電圧が観察される。Therefore, when an AC voltage is applied to the piezoelectric element through the capacitive element, the applied AC voltage and the voltage generated due to the distortion of the piezoelectric element are applied to the connecting portion between the piezoelectric element and the capacitive element. The combined voltage of is observed.
【０００７】そこで、この振動制御装置では、振動体の
一側面に貼着した一の圧電素子に、駆動と帰還との両機
能をもたせ、その圧電素子の逆圧電効果によって振動子
に、ひずみ、ひいては振動をもたらすとともに、圧電素
子と容量素子との接続部での合成電圧から、圧電素子の
圧電効果によって発生された電圧だけを分離して取り出
して帰還させることとしており、これがため、この装置
によれば、振動体の複数枚の圧電素子を貼着する場合に
比して、振動体の組立を容易ならしめることができると
ともに、圧電素子相互の特性差の影響、接着層の物性変
化の影響などを有効に除いて、振動子に安定した自励振
動を行わせることができる。Therefore, in this vibration control device, one piezoelectric element attached to one side surface of the vibrating body is provided with both functions of drive and feedback, and the vibrator is distorted by the inverse piezoelectric effect of the piezoelectric element. As a result, it causes vibration and separates only the voltage generated by the piezoelectric effect of the piezoelectric element from the combined voltage at the connection between the piezoelectric element and the capacitive element to return it. According to this, compared to the case where a plurality of piezoelectric elements of the vibrating body are attached, the assembling of the vibrating body can be facilitated and the influence of the characteristic difference between the piezoelectric elements and the influence of the change of the physical property of the adhesive layer can be achieved. It is possible to cause the vibrator to perform stable self-excited vibration by effectively removing the above.
【０００８】[0008]
【実施例】以下にこの発明の実施例を図面に基づいて説
明する。図１は、この発明の実施例を示すブロック線図
であり、図中、従来技術で述べた部分と同様の部分はそ
れらと同一の番号で示す。ここでは、共振点を有する振
動体１の一側面に、接着層11を介して一の圧電素子12を
貼着することによって振動子４を構成する。そして、そ
の圧電素子12に、容量素子Ｃを介して駆動装置５を接続
するとともに、この駆動装置５を、直列に接続したそれ
ぞれの抵抗素子Ｒ1 ，Ｒ2 にもまた接続し、これによっ
て圧電素子12及び抵抗素子Ｒ2 のそれぞれに、駆動装置
５の出力を供給できるようにする。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention, in which the same parts as those described in the prior art are designated by the same reference numerals. Here, the vibrator 4 is configured by attaching one piezoelectric element 12 to one side surface of the vibrating body 1 having a resonance point via the adhesive layer 11. Then, the driving device 5 is connected to the piezoelectric element 12 via the capacitive element C, and the driving device 5 is also connected to each of the resistance elements R 1 and R 2 connected in series. The output of the driving device 5 is supplied to each of the element 12 and the resistance element R 2 .
【０００９】またここでは、圧電素子12と容量素子Ｃと
の接続部14、および抵抗素子Ｒ1 ，Ｒ2 の接続部15のそ
れぞれを、差動増幅器16に接続し、この差動増幅器16を
さらに、駆動装置５に接続する。このことにより、差動
増幅器16は、それぞれの接続部14, 15からの出力を差動
して、その差動出力を駆動装置５に帰還させるべく機能
する。Further, here, each of the connecting portion 14 of the piezoelectric element 12 and the capacitive element C and the connecting portion 15 of the resistance elements R 1 and R 2 are connected to a differential amplifier 16, and this differential amplifier 16 is connected. Further, it is connected to the driving device 5. As a result, the differential amplifier 16 functions to differentially output the outputs from the respective connection portions 14 and 15 and to feed back the differential output to the drive device 5.
【００１０】このような振動制御装置によれば、抵抗素
子Ｒ1 ，Ｒ2 の接続部15の出力は、圧電素子12を単なる
容量素子と見なしたときの、接続部14での印加交流電圧
とほぼ同等となるので、それらの両接続部14, 15の出力
を差動増幅器16にて差動することによって、圧電素子12
のひずみに伴って発生する電圧を分離して取り出すこと
ができ、従って、その差動出力を帰還信号として駆動装
置５に帰還させるこにより、振動子４の安定した自励振
動をもたらすことができる。According to such a vibration control device, the output of the connecting portion 15 of the resistance elements R 1 and R 2 is the AC voltage applied to the connecting portion 14 when the piezoelectric element 12 is regarded as a mere capacitive element. Since it is almost the same as that of the piezoelectric element 12
The voltage generated due to the distortion can be separated and taken out. Therefore, by feeding back the differential output to the driving device 5 as a feedback signal, stable self-excited vibration of the vibrator 4 can be brought about. ..
【００１１】図２は、この発明の他の実施例を示すブロ
ック線図であり、これは、図１で説明した抵抗素子
Ｒ1 ，Ｒ2 に代えて、可変抵抗器ＶＲの固定端子を駆動
装置５に接続したものである。FIG. 2 is a block diagram showing another embodiment of the present invention, in which the fixed terminals of the variable resistor VR are driven in place of the resistance elements R 1 and R 2 explained in FIG. It is connected to the device 5.
【００１２】この例によれば、可変抵抗器ＶＲの可動端
子17を差動増幅器16に接続することで、圧電素子12への
印加交流電圧と正確に一致させた出力を可動端子17から
取り出すことができるので、さらに安定した自励振動を
もたらすことができる。According to this example, the movable terminal 17 of the variable resistor VR is connected to the differential amplifier 16 so that the output that is exactly matched with the AC voltage applied to the piezoelectric element 12 is taken out from the movable terminal 17. Therefore, more stable self-excited vibration can be provided.
【００１３】[0013]
【発明の効果】以上説明したように、この発明によれ
ば、一の圧電素子を、駆動用および帰還用のそれぞれの
圧電素子として機能させることができるので、振動体へ
の圧電素子の貼着作業、ひいては、振動子の組立作業を
極めて容易ならしめることができる。さらに、複数枚の
圧電素子相互の特性差の、自励振動に与える影響を取り
除くことができ、しかも、複数の接着層の、それぞれの
物性の変化が自励振動に与える影響を大きく低減するこ
とができる。As described above, according to the present invention, one piezoelectric element can be made to function as a driving piezoelectric element and a feedback piezoelectric element, so that the piezoelectric element can be attached to the vibrating body. The work, and eventually the work of assembling the vibrator, can be made extremely easy. Further, it is possible to remove the influence of the characteristic difference between the plurality of piezoelectric elements on the self-excited vibration, and to significantly reduce the influence of the change in the physical properties of the plurality of adhesive layers on the self-excited vibration. You can
【図１】この発明の一実施例を示すブロック線図であ
る。FIG. 1 is a block diagram showing an embodiment of the present invention.
【図２】この発明の他の実施例を示すブロック線図であ
る。FIG. 2 is a block diagram showing another embodiment of the present invention.
【図３】従来例を示すブロック線図である。FIG. 3 is a block diagram showing a conventional example.
１ 振動体 ４ 振動子 ５ 駆動装置 11 接着層 12 圧電素子 14, 15 接続部 16 差動増幅器 17 可動端子 Ｃ 容量素子 Ｒ1 ，Ｒ2, 抵抗素子 ＶＲ 可変抵抗器1 Vibrating body 4 Vibrator 5 Driving device 11 Adhesive layer 12 Piezoelectric element 14, 15 Connection section 16 Differential amplifier 17 Moving terminal C Capacitive element R 1 , R 2, Resistance element VR Variable resistor
Claims (2)
の圧電素子を貼着してなる振動子と、前記圧電素子に接
続した駆動装置とを具える振動制御装置であって、 前記駆動装置を、容量素子を介して圧電素子に接続する
とともに、相互に直列接続した抵抗素子にそれぞれ接続
し、容量素子と圧電素子との接続部の出力を、直列接続
した抵抗素子間の接続部の出力と差動して前記駆動装置
に帰還させることを特徴とする振動制御装置。1. A vibration control device comprising: a vibrator in which one piezoelectric element is attached to one side surface of a vibrating body having a resonance point; and a driving device connected to the piezoelectric element. The drive device is connected to the piezoelectric element via the capacitive element, and is also connected to the resistance elements connected in series to each other, and the output of the connection section between the capacitive element and the piezoelectric element is connected to the series-connected resistance element. And a vibration control device which is differentially fed back to the drive device.
圧電素子との接続部の出力を、可変抵抗器の可動端子の
出力と差動することを特徴とする請求項１記載の振動制
御装置。2. The vibration control according to claim 1, wherein the resistance element is a variable resistor, and the output of the connecting portion between the capacitance element and the piezoelectric element is differentiated from the output of the movable terminal of the variable resistor. apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3262565A JPH0571968A (en) | 1991-09-17 | 1991-09-17 | Vibration control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3262565A JPH0571968A (en) | 1991-09-17 | 1991-09-17 | Vibration control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0571968A true JPH0571968A (en) | 1993-03-23 |
Family
ID=17377573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3262565A Pending JPH0571968A (en) | 1991-09-17 | 1991-09-17 | Vibration control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0571968A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0696721A3 (en) * | 1994-08-10 | 1996-04-03 | Akai Electric | Vibration control apparatus having oscillation frequency regulation |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5254354A (en) * | 1975-10-29 | 1977-05-02 | Fujitsu Ltd | Oscillator |
| JPS58160809A (en) * | 1981-12-08 | 1983-09-24 | ナシヨナル・リサ−チ・デイベロツプメント・コ−ポレイシヨン | Gyroscope |
| JPH02266214A (en) * | 1989-04-06 | 1990-10-31 | Murata Mfg Co Ltd | Vibration gyro |
| JPH0310113A (en) * | 1989-06-08 | 1991-01-17 | Tokimec Inc | Gyroscope apparatus |
| JPH03125204A (en) * | 1989-10-09 | 1991-05-28 | Brother Ind Ltd | Vibration controller |
-
1991
- 1991-09-17 JP JP3262565A patent/JPH0571968A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5254354A (en) * | 1975-10-29 | 1977-05-02 | Fujitsu Ltd | Oscillator |
| JPS58160809A (en) * | 1981-12-08 | 1983-09-24 | ナシヨナル・リサ−チ・デイベロツプメント・コ−ポレイシヨン | Gyroscope |
| JPH02266214A (en) * | 1989-04-06 | 1990-10-31 | Murata Mfg Co Ltd | Vibration gyro |
| JPH0310113A (en) * | 1989-06-08 | 1991-01-17 | Tokimec Inc | Gyroscope apparatus |
| JPH03125204A (en) * | 1989-10-09 | 1991-05-28 | Brother Ind Ltd | Vibration controller |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0696721A3 (en) * | 1994-08-10 | 1996-04-03 | Akai Electric | Vibration control apparatus having oscillation frequency regulation |
| US5594168A (en) * | 1994-08-10 | 1997-01-14 | Akai Electric Co. | Vibration control apparatus having oscillation frequency regulation |
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