JPS6159005B2 - - Google Patents
Info
- Publication number
- JPS6159005B2 JPS6159005B2 JP51099619A JP9961976A JPS6159005B2 JP S6159005 B2 JPS6159005 B2 JP S6159005B2 JP 51099619 A JP51099619 A JP 51099619A JP 9961976 A JP9961976 A JP 9961976A JP S6159005 B2 JPS6159005 B2 JP S6159005B2
- Authority
- JP
- Japan
- Prior art keywords
- vibrating body
- solenoid
- vibrating
- frequency
- tuning
- 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
Links
- 230000005284 excitation Effects 0.000 claims description 16
- 238000001514 detection method Methods 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 2
- 238000007493 shaping process Methods 0.000 description 4
- 239000003082 abrasive agent Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000005279 excitation period Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Landscapes
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Description
【発明の詳細な説明】
本発明は、金属製振動体、例えば音叉などの調
律のために上記振動体を研削して目的とする固有
振動数に設定する自動調律装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic tuning device for tuning a metal vibrating body, such as a tuning fork, by grinding the vibrating body and setting the vibrating body to a desired natural frequency.
一般に上記振動体の調律装置は、振動体の研削
→振動体の励振この励振によつて生ずる振動体の
固有振動数を測定し目標調律周波数信号と比較→
再び研削の３つの工程の繰り返しによつて振動体
を目的とする固有振動数に設定している。しかし
その際、振動体を励振する手段としては、目標調
律周波数信号とは何等関係を有しない手段を採つ
ており、自動調律する場合、比較用基準として別
個に目標調律周波数信号発生手段を必要とし装置
が大型化していた。又振動体を励振する励振器と
振動体の固有振動数を検出する検出器とが別体に
設けられていたので、振動体に近接して２つの部
品を配置しなければならず、特に小型な振動体の
調律装置の場合には上記部品の配置が困難であ
り、振動体の取り付け、取り外しに不都合が生ず
るという欠点があつた。 In general, the above-mentioned tuning device for a vibrating body involves grinding the vibrating body → excitation of the vibrating body, measuring the natural frequency of the vibrating body caused by this excitation, and comparing it with the target tuning frequency signal →
By repeating the three grinding steps again, the vibrating body is set to the desired natural frequency. However, in this case, the means for exciting the vibrating body is a means that has nothing to do with the target tuning frequency signal, and when performing automatic tuning, a separate means for generating a target tuning frequency signal is required as a reference for comparison. The equipment was getting larger. In addition, since the exciter that excites the vibrating body and the detector that detects the natural frequency of the vibrating body are provided separately, two parts must be placed close to the vibrating body, which is especially important for small devices. In the case of a tuning device for a vibrating body, it is difficult to arrange the above-mentioned parts, and there are disadvantages in that it is inconvenient to attach and remove the vibrating body.
そこで本発明は、振動体の自動調律を行なうに
当たり、目標調律周波数信号を振動体の励振用と
比較用基準とに共用しかつ励振器と検出器の機能
を１個のソレノイドに持たせることにより、上記
欠点を除去せんとしたものである。以下図に示す
実施例によつて本発明を説明する。 Therefore, in performing automatic tuning of a vibrating body, the present invention shares a target tuning frequency signal for excitation of the vibrating body and as a comparison standard, and provides a single solenoid with the functions of an exciter and a detector. , which attempts to eliminate the above drawbacks. The present invention will be explained below with reference to embodiments shown in the figures.
第１図において１は金属性振動体Ａの取付台
で、この取付台１の上面にクランプ２が臨ませて
あり、このクランプ２と取付台１との間に振動体
Ａをその振動部を取付台の外方に突出させて基部
を挾合固定するようにしてある。即ち取付台１及
びクランプ２によつて振動体Ａの固定部を構成し
ている。上記突出した振動体Ａの振動部にはソレ
ノイド３が臨ませてあり、このソレノイド３から
の交流磁界が上記振動部に励振作用するようにし
てある。上記ソレノイド３は振動体Ａの固有振動
周波数の検出作用を兼ね、後述するように交互に
振動体Ａを励振、及び振動体の固有振動周波数の
検出が行なえるようになされている。一方、振動
体Ａの振動部の研削面側には、高圧空気またはガ
ス等の加圧気体の供給源と微粉末状研磨材の供給
源に夫々連絡連通した高速噴射ノズル４が指向さ
れ、このノズル４からの噴射流に微粉末研磨材を
混合させて気体と一緒に噴射するようになつてい
る。上記高速噴射ノズル４からなる研削手段は、
振動体Ａが目標調律周波数と一致するまで動作す
る。 In Fig. 1, reference numeral 1 denotes a mounting base for a metallic vibrating body A, and a clamp 2 is placed on the top surface of this mounting base 1. The vibrating body A is mounted between the clamp 2 and the mounting base 1, and its vibrating part is mounted between the clamp 2 and the mounting base 1. The base is fitted and fixed by protruding outward from the mounting base. That is, the mounting base 1 and the clamp 2 constitute a fixing part of the vibrating body A. A solenoid 3 faces the vibrating part of the protruding vibrating body A, and an alternating magnetic field from the solenoid 3 acts to excite the vibrating part. The solenoid 3 also has the function of detecting the natural vibration frequency of the vibrating body A, and is configured to alternately excite the vibrating body A and detect the natural vibration frequency of the vibrating body, as will be described later. On the other hand, a high-speed jet nozzle 4 is directed toward the grinding surface side of the vibrating part of the vibrating body A, and is connected to a supply source of pressurized gas such as high-pressure air or gas, and a supply source of fine powder abrasive material. Fine powder abrasive material is mixed with the jet stream from the nozzle 4 and is injected together with the gas. The grinding means consisting of the high speed injection nozzle 4 is
The vibrating body A operates until it matches the target tuning frequency.
また、上記ソレノイド３に巻回したコイルの一
端は、一定時間々隔で間欠的に同ソレノイド３を
励磁する励振回路５及びソレノイド３の無励磁間
内に誘起する振動体の固有振動周波数の基本周波
数成分のみを通過させるフイルター回路６に各々
接続してある。上記励振回路５はクロツクパルス
発生器７のクロツクパルスに従つて基準周波数発
振器８の出力信号を間欠的に励磁信号として発生
する。また上記フイルター回路６は、波形成形回
路９を介して比較回路１０に加えられ、基準周波
数発振器８の基準周波数と比較し、一致したとき
のみ停止信号を発して調律コントロール回路１１
により前記ノズル４に設けられた図示しないシヤ
ツター機構を開閉駆動する。 In addition, one end of the coil wound around the solenoid 3 is connected to an excitation circuit 5 that excites the solenoid 3 intermittently at regular intervals, and a fundamental frequency of the natural vibration of the vibrating body induced during the non-excitation period of the solenoid 3. Each of them is connected to a filter circuit 6 that allows only frequency components to pass through. The excitation circuit 5 intermittently generates the output signal of the reference frequency oscillator 8 as an excitation signal in accordance with the clock pulse of the clock pulse generator 7. The filter circuit 6 is also added to a comparator circuit 10 via a waveform shaping circuit 9, and is compared with the reference frequency of the reference frequency oscillator 8, and only when they match, a stop signal is issued to the tuning control circuit 11.
This drives a shutter mechanism (not shown) provided in the nozzle 4 to open and close.
今、振動体Ａを目標の周波数に調律しようとす
ると、まずソレノイド３に、基準周波数発振器８
よりの基準周波数信号を励振回路５により第２図
ａに示す一定間隔の間欠的なON時間T1、OFF時
間T2なる励磁信号を加え、振動体Ａを振動させ
る。同時にノズル４を調律コントロール回路１１
により上記励振回路５と同様のタイミングの第２
図ｂに示す信号に同期してシヤツター機構を開閉
しながら研磨材を噴射し、振動体Ａを研磨して行
く。振動体Ａは、ソレノイド３によつて第２図ｃ
に示す固有振動周波数で振動するが、振振回路５
の励磁信号がOFF時間T2にフイルター回路６の
ゲートを開成してソレノイド３を振動体Ａの固有
振動周波数検出素子として作用させ、そのコイル
に誘起した検出信号をフイルター回路６に加えて
基本周波数成分のみを通過させる。このフイルタ
ー回路６の出力信号は、さらに波形成形回路９に
より第２図ｄに示すように波形成形されて比較回
路１０に加えられ、基準周波数発振器８よりの第
２図ｅに示す基準周波数信号と比較する。ここで
波形成形回路９の出力信号は、前記励磁信号の
OFF時間T2よりやや短かい時間T3とすることが
調律精度を向上させる上で好ましく、比較回路１
０に加えられる基準周波数信号の時間もこれと同
様の時間T3とする。以上までの工程で、振動体
Ａの固有振動周波数が目標調律周波数と同一であ
れば、比較回路１０により周波数の一致を検出し
て第２図ｆに示す一致信号が調律コントロール回
路１１に加えられてノズル４による研磨を停止す
ると共に他の動作も停止させる。一方、振動体Ａ
の固有振動周波数と目標調律周波数と異なれば、
さらに前述の工程が繰り返され、上記両周波数が
一致するまで続行する。 Now, when trying to tune the vibrating body A to the target frequency, first the solenoid 3 is connected to the reference frequency oscillator 8.
An excitation circuit 5 applies an excitation signal having an intermittent ON time T 1 and OFF time T 2 at constant intervals as shown in FIG. 2A to vibrate the vibrating body A. At the same time, the tuning control circuit 11 controls the nozzle 4.
Therefore, the second circuit with the same timing as the excitation circuit 5
The abrasive material is injected while opening and closing the shutter mechanism in synchronization with the signal shown in FIG. 2B, thereby polishing the vibrating body A. The vibrating body A is operated by the solenoid 3 as shown in Fig. 2c.
The vibration circuit 5 vibrates at the natural vibration frequency shown in
The excitation signal opens the gate of the filter circuit 6 during the OFF time T2 , causing the solenoid 3 to act as a natural vibration frequency detection element of the vibrating body A, and adds the detection signal induced in the coil to the filter circuit 6 to detect the fundamental frequency. Only components are allowed to pass through. The output signal of the filter circuit 6 is further waveform-shaped by the waveform shaping circuit 9 as shown in FIG. compare. Here, the output signal of the waveform shaping circuit 9 is the same as the excitation signal.
It is preferable to set the OFF time T3 to be slightly shorter than the OFF time T2 in order to improve tuning accuracy.
The time of the reference frequency signal added to 0 is also assumed to be the same time T3 . In the above steps, if the natural vibration frequency of the vibrating body A is the same as the target tuning frequency, the comparator circuit 10 detects frequency coincidence and applies the coincidence signal shown in FIG. 2f to the tuning control circuit 11. Then, polishing by the nozzle 4 is stopped, and other operations are also stopped. On the other hand, vibrator A
If the natural vibration frequency of is different from the target tuning frequency,
Further, the above steps are repeated until the two frequencies match.
第３図は、本発明の他の実施例を示し、上述の
第１図における高速噴射ノズル４のかわりに回転
駆動源Ｍに結合されて回転する一部切欠き円板状
砥石１２を振動体Ａの研削面側に臨ませたもので
ある。而して、上記円板状砥石１２の切欠き部１
２ａに位置した回転間隔の半サイクルにソレノイ
ド３を励磁して振動体Ａを振動させ、残りの半サ
イクルで検出して前記第１図と同様の動作により
振動体Ａを目標の周波数に調律する。ここで、円
板状砥石１２により振動体Ａを研削している最中
であつてもソレノイド３を励磁していてもよい。 FIG. 3 shows another embodiment of the present invention, in which, instead of the high-speed injection nozzle 4 in FIG. It is shown facing the grinding surface side of A. Therefore, the cutout portion 1 of the disc-shaped grindstone 12
The solenoid 3 is excited to vibrate the vibrating body A during a half cycle of the rotation interval located at 2a, and the vibrating body A is tuned to the target frequency by detecting it during the remaining half cycle and performing the same operation as in FIG. 1 above. . Here, the solenoid 3 may be excited even while the vibrating body A is being ground by the disc-shaped grindstone 12.
尚、クロツクパルス発生器７のタイミングと円
板状砥石１２の回転は同期させる必要があり、回
転駆動体Ｍをクロツクパルスに同期して回転させ
るか、あるいは、円板状砥石１２の回転を図示し
ない位置検出素子で検出して、この出力信号をタ
イミングパルスとして用いてもよい。 Note that the timing of the clock pulse generator 7 and the rotation of the disc-shaped grindstone 12 must be synchronized, so either the rotary drive body M is rotated in synchronization with the clock pulse, or the rotation of the disc-shaped grindstone 12 is rotated at a position not shown. The output signal may be detected by a detection element and used as a timing pulse.
上述の実施例では、振動体の固有振動周波数を
検出する際は研削動作を停止させていたが、本発
明の目的を達成するに当たり実公昭49−43856号
公報に示されている如く、研削の精度を若干落と
してもさしつかえないとき等においては研削動作
を検出中も継続する方法をとることも可能であ
る。 In the above-mentioned embodiment, the grinding operation was stopped when detecting the natural vibration frequency of the vibrating body, but in order to achieve the object of the present invention, the grinding operation was stopped as shown in Japanese Utility Model Publication No. 49-43856. In cases where a slight decrease in accuracy is acceptable, it is also possible to continue the grinding operation even during detection.
以上説明した本発明によれば、目標調律周波数
信号を振動体の励振用と研削された振動体の固有
振動数との比較用とに共用し、かつ１個のソレノ
イドに振動体の励振と振動数の検出の両機能を持
たせているので、構成が簡易となり機構が簡略化
される。これは振動体の自動調律においてその装
置の小型化を可能とし、又ソレノイドの共用は特
に極小の振動体を調律する場合に、少ない空間に
配置でき有効である。 According to the present invention described above, the target tuning frequency signal is shared for excitation of the vibrating body and for comparison with the natural frequency of the ground vibrating body, and one solenoid is used to excite the vibrating body and to vibrate the vibrating body. Since it has both the function of detecting numbers, the configuration is simple and the mechanism is simplified. This makes it possible to miniaturize the device in automatic tuning of the vibrating body, and sharing a solenoid is effective because it can be arranged in a small space, especially when tuning an extremely small vibrating body.
更に上記ソレノイドを所定の時間間隔にて励磁
し、励振と検出の機能を交互に持たせているの
で、検出時、振動体には励振作用が働かず、精度
の高い固有振動数を検出できる。又検出作用を所
定間隔にて間欠的に行なうので、例えば非常に硬
度の高い振動体を研削するときは、その検出間隔
を広げても十分精度の高い研削ができ、常時振動
体の固有振動数を検出する方法に比し一層効率的
な検出ができる。 Further, since the solenoid is excited at predetermined time intervals and has the functions of excitation and detection alternately, no excitation action is applied to the vibrating body during detection, and the natural frequency can be detected with high precision. In addition, since the detection action is performed intermittently at predetermined intervals, for example, when grinding a very hard vibrating body, even if the detection interval is widened, grinding can be performed with sufficient precision, and the natural frequency of the vibrating body can be constantly maintained. This method enables more efficient detection than methods that detect .
図は本発明の実施例を示し、第１図は構成ブロ
ツク図、第２図は第１図における、タイミングチ
ヤート図、第３図は、他の実施例を示す構成ブロ
ツク図である。
Ａ……振動体、３……ソレノイド、４……高速
噴射ノズル、５……励振回路、６……フイルター
回路、７……クロツクパルス発生器、８……基準
周波数発振器、９……波形成形回路、１０……比
較回路、１１……調律コントロール回路、１２…
…一部切欠き円板状砥石。
The figures show an embodiment of the present invention; FIG. 1 is a block diagram of the structure, FIG. 2 is a timing chart of FIG. 1, and FIG. 3 is a block diagram of another embodiment. A... Vibrating body, 3... Solenoid, 4... High speed injection nozzle, 5... Excitation circuit, 6... Filter circuit, 7... Clock pulse generator, 8... Reference frequency oscillator, 9... Waveform shaping circuit , 10... Comparison circuit, 11... Tuning control circuit, 12...
...Partially notched disc-shaped grindstone.
Claims (1)
振動体の振動部に近接配置されるソレノイド、上
記振動体の振動部を研削する研削手段、上記ソレ
ノイドを一定時間間隔で間欠的にかつ目標調律周
波数信号によつて励磁する励磁手段、上記ソレノ
イドの無励磁間に該ソレノイドの巻回コイルに発
生する上記振動体の固有振動周波数信号と前記目
標調律周波数信号との周波数の一致を検出する検
出手段とを備え、該検出手段から出力される一致
信号によつて前記研削手段の研削動作を停止させ
るようにしたことを特徴としてなる振動体の自動
調律装置。1. A fixing part that fixes the base of a metal vibrating body, a solenoid that is arranged close to the vibrating part of the vibrating body, a grinding means that grinds the vibrating part of the vibrating body, and a fixing part that fixes the base of the vibrating body, a solenoid that grinds the vibrating part of the vibrating body intermittently and at a specified time. Excitation means for exciting by a tuning frequency signal; detection for detecting frequency coincidence between the natural vibration frequency signal of the vibrating body generated in the wound coil of the solenoid and the target tuning frequency signal while the solenoid is not energized; 1. An automatic tuning device for a vibrating body, comprising: means for stopping the grinding operation of the grinding means in response to a coincidence signal output from the detection means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9961976A JPS5325418A (en) | 1976-08-23 | 1976-08-23 | Automativ vibrator temperament device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9961976A JPS5325418A (en) | 1976-08-23 | 1976-08-23 | Automativ vibrator temperament device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5325418A JPS5325418A (en) | 1978-03-09 |
| JPS6159005B2 true JPS6159005B2 (en) | 1986-12-15 |
Family
ID=14252098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9961976A Granted JPS5325418A (en) | 1976-08-23 | 1976-08-23 | Automativ vibrator temperament device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5325418A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01127804U (en) * | 1988-02-23 | 1989-08-31 | ||
| KR20230004571A (en) | 2020-04-09 | 2023-01-06 | 가부시키가이샤 나카타 세이사쿠쇼 | Metal tube manufacturing method and device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4935027A (en) * | 1972-08-02 | 1974-04-01 | ||
| JPS4943856U (en) * | 1972-07-19 | 1974-04-17 |
-
1976
- 1976-08-23 JP JP9961976A patent/JPS5325418A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4943856U (en) * | 1972-07-19 | 1974-04-17 | ||
| JPS4935027A (en) * | 1972-08-02 | 1974-04-01 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01127804U (en) * | 1988-02-23 | 1989-08-31 | ||
| KR20230004571A (en) | 2020-04-09 | 2023-01-06 | 가부시키가이샤 나카타 세이사쿠쇼 | Metal tube manufacturing method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5325418A (en) | 1978-03-09 |
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