JPH07235123A - Stabilizer detection apparatus - Google Patents
Stabilizer detection apparatusInfo
- Publication number
- JPH07235123A JPH07235123A JP4768094A JP4768094A JPH07235123A JP H07235123 A JPH07235123 A JP H07235123A JP 4768094 A JP4768094 A JP 4768094A JP 4768094 A JP4768094 A JP 4768094A JP H07235123 A JPH07235123 A JP H07235123A
- Authority
- JP
- Japan
- Prior art keywords
- stabilizer
- waveform
- angular acceleration
- turntable
- detected
- 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
Landscapes
- Rotational Drive Of Disk (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ＣＤプレーヤ及びＬＤ
プレーヤ等の光ディスク再生装置に関するものである。FIELD OF THE INVENTION The present invention relates to a CD player and an LD.
The present invention relates to an optical disk reproducing device such as a player.
【０００２】[0002]
【従来の技術】光ディスクプレーヤに於いては、ディス
クの回転数を上げると共に外部振動に対して安定な回転
駆動動作を光波長精度で維持すべくスタビライザをディ
スク上に載置して所定の回転数や速度に制御しターンテ
ーブルを駆動していた。2. Description of the Related Art In an optical disk player, a stabilizer is mounted on the disk to increase a rotational speed of the disk and maintain a stable rotational driving operation against an external vibration with an optical wavelength accuracy. It was controlling the speed and driving the turntable.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、従来スタビ
ライザをディスク上に載置せず回転させた場合高速回転
により、ディスクがターンテーブルから浮き上がり、飛
び出してディスクを傷つける欠点や装置を破損してしま
う欠点があった。SUMMARY OF THE INVENTION According to the present invention, when a conventional stabilizer is rotated without being placed on a disc, the disc is lifted from a turntable due to high-speed rotation, jumps out and damages the disc. There was a drawback.
【０００４】[0004]
【課題を解決するための手段】本発明は、光ディスク再
生装置のターンテーブルに装着されたディスクにスタビ
ライザが載置された状態で、立上げ回転駆動される場合
と、スタビライザが装着されない場合を検出するモータ
駆動コイルに流れる電流波形を検出する検出手段及び波
形を判別する手段によってターンテーブルの角加速度を
計算し、スタビライザの有無を検出してスタビライザ無
しの状態での高速回転を防止するようにしたスタビライ
ザ検出装置である。DISCLOSURE OF THE INVENTION The present invention detects a case where a stabilizer is placed on a disk mounted on a turntable of an optical disk reproducing apparatus, a case where the disk is driven to start up and a case where the stabilizer is not installed. The angular acceleration of the turntable is calculated by the detection means that detects the current waveform flowing in the motor drive coil and the means that determines the waveform, and the presence or absence of the stabilizer is detected to prevent high-speed rotation without the stabilizer. It is a stabilizer detection device.
【０００５】また一定の時間の範囲にターンテーブルの
回転速度を立ち上げる立ち上げ角加速度のタイムテーブ
ルをマイコンに有し、スタビライザがスリップすること
による立上動作の不安定さを無くしたスタビライザ検出
装置である。最初はスリツプしない程度でゆっくり回転
速度を立上げるタイムテーブルにしておけばスタビライ
ザ無しの場合との比較値の差が大きくなり判別が容易に
なり、より早期にスタビライザ無しを検出することがで
きる。Further, a stabilizer detecting device having a timetable of a rising angular acceleration for raising the rotation speed of a turntable in a predetermined time range in a microcomputer and eliminating instability of a rising operation due to a stabilizer slipping Is. At first, if a timetable in which the rotation speed is slowly raised without slipping is used, the difference in the comparison value with that without the stabilizer becomes large, the discrimination becomes easier, and the absence of the stabilizer can be detected earlier.
【０００６】[0006]
【実施例】本発明の一実施例を図面をもとに説明する。
図１は本発明の一実施例を示すブロック図で、図２は検
出波形を説明するための図で、図３はフローチャートで
ある。また図４はスタビライザ有無による角加速度の差
を示す図である。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings.
1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a diagram for explaining a detected waveform, and FIG. 3 is a flowchart. FIG. 4 is a diagram showing a difference in angular acceleration depending on the presence or absence of a stabilizer.
【０００７】８極の磁石１ａの磁極を有するホールモー
タ１はホールモータドライブ回路により回転駆動され図
示せずもこのモータはターンテーブルに連結されてい
る。ホールモータドライブ回路２の起動電流は図２の
ａ，ｂに示すごときスタビライザがターンテーブルに載
置されたディスク上への装着されその有無によってモー
タに加わる負荷が変わりモータ起動電流の波形の立上り
に波形差を生じる。この波形差を例えばコンパレータを
介した波形整形回路３を介して図２のｃ或いはｄに示す
ごときパルス波形に整形する。The hall motor 1 having eight poles of magnets 1a is rotationally driven by a hall motor drive circuit, and this motor is connected to a turntable (not shown). The starting current of the hall motor drive circuit 2 is such that the stabilizer as shown in FIGS. 2A and 2B is mounted on the disk mounted on the turntable, the load applied to the motor changes depending on the presence or absence of the stabilizer, and the waveform of the motor starting current rises. Waveform difference occurs. This waveform difference is shaped into a pulse waveform as shown in c or d of FIG. 2 via the waveform shaping circuit 3 via a comparator, for example.
【０００８】スタビライザがデイスク上に有る場合と無
い場合では負荷であるイナーシャが違う為、図４に示し
た様に角加速度(ａ，ａ’)が異なる。また角加速度
(ａ，ａ’)は、図２に示したホールモータの回転時間Ｔ
1，Ｔ2より下記の様にマイコンにて計算し求めることが
できる。(Ｓ1)Since the load inertia is different when the stabilizer is on the disk and when it is not, the angular acceleration (a, a ') is different as shown in FIG. Also the angular acceleration
(a, a ') is the rotation time T of the hall motor shown in FIG.
It can be calculated from 1 and T2 by the microcomputer as follows. (S1)
【０００９】スタビライザ有の場合の角加速度はａ＝２
θ／(Ｔ2 2−Ｔ1 2) スタビライザ無の場合にはａ’＝２θ／(Ｔ’2 2−Ｔ’1
2)となる。(Ｓ2)The angular acceleration with a stabilizer is a = 2.
θ / (T2 2-T1 2) Without stabilizer, a '= 2θ / (T'2 2-T'1
2). (S2)
【００１０】ここで、ａ，ａ’間にしきい値Ａを設定
し、このしきい値によりマイコンにてスタビライザの有
無の検出を行い、スタビライザの無い場合は、１回転く
らいの短時間に検出が成され、高速回転まで至り、ター
ンテーブルから光ディスクが外れ事故になることはな
い。(Ｓ3)Here, a threshold value A is set between a and a ', and the presence or absence of the stabilizer is detected by the microcomputer based on this threshold value. If there is no stabilizer, the detection can be performed in a short time of about one rotation. It is made up, and it reaches high speed rotation, and there is no accident that the optical disk comes off the turntable. (S3)
【００１１】また立上時間Ｔ1〜nと角加速度の比較テー
ブルをマイコン内のメモリーに有し、スリップの無い所
定の角加速度例えば曲線Ｂで立上げるようにマイコンの
メモリーに記憶されたタイムテーブルにより制御し特に
回転開始時の安全駆動を成すことができる。又上記検出
回路はホールモータの駆動電流波形を用いる例を示し説
明したがホール素子の出力のタイミング差を検出するこ
とによりモータの回転加速度を検出するように成すこと
が出来る。Further, a comparison table of the rising times T1 to n and the angular acceleration is provided in the memory of the microcomputer, and the time table stored in the memory of the microcomputer is used so as to rise at a predetermined angular acceleration without slip, for example, a curve B. It can be controlled to provide a safe drive, especially at the start of rotation. Although the above detection circuit has been described by using the example of using the drive current waveform of the hall motor, it can be configured to detect the rotational acceleration of the motor by detecting the timing difference of the output of the hall element.
【００１２】[0012]
【発明の効果】本発明によるとモータドライブ波形を検
出しモータ負荷を検出するので少ない回転範囲内でもっ
て高速起動回転を防止することができる。According to the present invention, since the motor drive waveform is detected and the motor load is detected, it is possible to prevent high-speed start-up rotation even within a small rotation range.
【図１】本発明の一実施例を示すブロック図。FIG. 1 is a block diagram showing an embodiment of the present invention.
【図２】検出波形を説明する図。FIG. 2 is a diagram illustrating a detected waveform.
【図３】検出フローチャート。FIG. 3 is a detection flowchart.
【図４】角加速度を示す図。FIG. 4 is a diagram showing angular acceleration.
１ ホールモータ ２ ホールモータドライブ回路 ３ 波形整形回路 ４ マイコン ５ スピンドルサーボ回路 1 Hall motor 2 Hall motor drive circuit 3 Waveform shaping circuit 4 Microcomputer 5 Spindle servo circuit
Claims (3)
クがターンテーブルに装着され、これにスタビライザを
載置して回転駆動する駆動手段と、上記駆動手段により
ディスクの回転の立上げ時スピンドルサーボされるサー
ボ波形を検出し角加速度を演算する手段と、スタビライ
ザの有無によるターンテーブルの角加速度の差を判別す
る手段と、スタビライザ無しを検出し上記駆動手段の立
上げを直ちに停止せしめる停止手段を具備することを特
徴とするスタビライザ検出装置。1. In an optical disk reproducing apparatus, an optical disk is mounted on a turntable, a stabilizer is mounted on the turntable, and driving means is driven to rotate, and spindle servo is performed by the driving means when the rotation of the disk is started. It is provided with means for detecting a servo waveform and calculating an angular acceleration, means for determining a difference in angular acceleration of the turntable depending on the presence or absence of a stabilizer, and stop means for detecting the absence of the stabilizer and immediately stopping the start-up of the driving means. A stabilizer detection device characterized by the above.
出するにホール素子の検出波形から角加速度を演算し、
角加速度の差を判別するようにした請求項１記載のスタ
ビライザ検出装置。2. An angular acceleration is calculated from a detected waveform of a Hall element to detect a servo waveform for spindle servo,
The stabilizer detection device according to claim 1, wherein a difference in angular acceleration is determined.
転数に所定の時間内に立上げるように角加速度を制御す
るようにした請求項１記載のスタビライザ検出装置。3. The stabilizer detection device according to claim 1, wherein the angular acceleration is controlled by the means for determining the angular acceleration so as to rise to a predetermined rotation speed within a predetermined time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6047680A JP2652942B2 (en) | 1994-02-22 | 1994-02-22 | Optical disc playback device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6047680A JP2652942B2 (en) | 1994-02-22 | 1994-02-22 | Optical disc playback device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07235123A true JPH07235123A (en) | 1995-09-05 |
| JP2652942B2 JP2652942B2 (en) | 1997-09-10 |
Family
ID=12782003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6047680A Expired - Fee Related JP2652942B2 (en) | 1994-02-22 | 1994-02-22 | Optical disc playback device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2652942B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111531341A (en) * | 2020-04-27 | 2020-08-14 | 中山市飞速智能装备有限公司 | Spring detection reversing mechanism for automatic perfume pump assembling machine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61133078A (en) * | 1984-12-03 | 1986-06-20 | Nec Corp | Disk device |
| JP3014769U (en) * | 1995-02-15 | 1995-08-15 | 株式会社曽根工具製作所 | Steel rod cutting equipment |
-
1994
- 1994-02-22 JP JP6047680A patent/JP2652942B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61133078A (en) * | 1984-12-03 | 1986-06-20 | Nec Corp | Disk device |
| JP3014769U (en) * | 1995-02-15 | 1995-08-15 | 株式会社曽根工具製作所 | Steel rod cutting equipment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111531341A (en) * | 2020-04-27 | 2020-08-14 | 中山市飞速智能装备有限公司 | Spring detection reversing mechanism for automatic perfume pump assembling machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2652942B2 (en) | 1997-09-10 |
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