JPH04163754A - Tape speed controller - Google Patents

Tape speed controller

Info

Publication number
JPH04163754A
JPH04163754A JP2292307A JP29230790A JPH04163754A JP H04163754 A JPH04163754 A JP H04163754A JP 2292307 A JP2292307 A JP 2292307A JP 29230790 A JP29230790 A JP 29230790A JP H04163754 A JPH04163754 A JP H04163754A
Authority
JP
Japan
Prior art keywords
frequency
reel
output
tape
rotating roller
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
Application number
JP2292307A
Other languages
Japanese (ja)
Inventor
Osamu Yamaguchi
修 山口
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP2292307A priority Critical patent/JPH04163754A/en
Publication of JPH04163754A publication Critical patent/JPH04163754A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To enable stable control of a tape speed at a high accuracy by correcting a reference frequency to be compared with the sum of an FG frequency of a supply reel and the FG frequency of a winding reel by computing the sum of a ratio between the supply reel FG frequency and a rotation roller FG frequency and that between the winding reel FG frequency and the rotation roller FG frequency. CONSTITUTION:Rotational speed of a reel is controlled so that a frequency of a reference frequency generator 14 is equal to the sum of both FG frequencies of a supply reel 1 and a winding reel 2 while the frequency of the reference frequency generator 14 is corrected by the results calculated from a rotary roller FG output and supply reel and winding reel FG outputs. This allows the direct control of both the FG frequencies of the supply reel 1 and the winding reel 2 and hence, there is no gliding generated between the tape and the reel to achieve a stable control with an substantial rise in a control gain. Besides, the tape speed can be changed simply by changing the frequency of the reference frequency generator 14 thereby enabling the keeping of a set tape speed stably.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は磁気記録再生装置等のテープ速度制御装置に関
する。
DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION This invention relates to tape speed control devices for magnetic recording and reproducing devices and the like.

従来の技術 近年、電子機器に多機能、高性能が望まれ、VTRのテ
ープの速度制御においてもよシ高度な技術が要求される
ようになっている。
BACKGROUND OF THE INVENTION In recent years, electronic equipment has been desired to have multiple functions and high performance, and even more advanced technology has been required for VTR tape speed control.

以下、図面を参照しながら従来のテープ速度制御装置の
一例について説明する。
An example of a conventional tape speed control device will be described below with reference to the drawings.

第3図にブロック図で示すように、回転ローラ6のFG
(周波数発電機)11の出力の周期を速度制御回路5に
て検出し、周期が一定となるようにモータ3を制御し、
駆動ベルト4によって巻取リー/L/2に動力を伝達し
、テープ7の速度を制御する構成となっていた。
As shown in the block diagram in FIG.
(Frequency generator) The speed control circuit 5 detects the period of the output of 11, and controls the motor 3 so that the period is constant.
The drive belt 4 transmitted power to the take-up reel L/2 to control the speed of the tape 7.

発明が解決しようとする課題 このような従来のテープ速度制御装置では、何らかの外
乱により、テープ7が回転ローラ6よシ浮くと、テープ
実速度よシ回転ローラのFGllの速シ情報ソ゛低くな
り・ リ−″の回転速度を上げるように1度制御回路5
は働く。するとテープ7は急に回転ローラ6に押し当て
られ、テープの実速度に等しい速度情報が回転ローラF
G11より検呂され、速度制御回路5は巻取り−zLz
2の回転速度を下げるように働き、その結果テープ7は
急にたるみ、再び回転ローラよシ浮くというようなハン
チング現象が発生しやすく、これを防ぐため、速度制御
回路6の過渡応答速度をかなシ低くしなければならなか
った。
Problems to be Solved by the Invention In such a conventional tape speed control device, when the tape 7 floats above the rotating roller 6 due to some disturbance, the speed information of the rotating roller FGll becomes lower than the actual tape speed. control circuit 5 once to increase the rotation speed of
works. Then, the tape 7 is suddenly pressed against the rotating roller 6, and speed information equal to the actual speed of the tape is transferred to the rotating roller F.
The speed control circuit 5 is checked from G11, and the speed control circuit 5 starts winding -zLz
As a result, the tape 7 suddenly slackens and is likely to float again on the rotating roller, which is a hunting phenomenon that tends to occur.To prevent this, the transient response speed of the speed control circuit 6 is I had to lower it.

本発明は上記課題を解決するもので、速度制御特性が良
く、安定なテープ速度制御装置を提供することを目的と
している。
The present invention has been made to solve the above problems, and an object of the present invention is to provide a tape speed control device that has good speed control characteristics and is stable.

課題を解決するだめの手段 が等しくなるようにリールの回転速度を制御し、かつ、
回転ローラFG圧力と供給!J/L/FGと巻取リール
FG圧力より算出した結果によね基準周波数発生器の周
波数を補正するように構成してなるものである。
Control the rotational speed of the reel so that the means to solve the problem are equal, and
Rotating roller FG pressure and supply! The frequency of the reference frequency generator is corrected based on the result calculated from J/L/FG and the take-up reel FG pressure.

作   用 本発明は上記した構成により、直接の制御対称は供給リ
ールと巻取リール両FGの周波数とカリ、テープとリー
ルとの間には滑シは発生しないので、制御利得をかなυ
上げて安定に制御できる。また、テープ速度を変えるに
は基準周波数発生器の周波数を変えればよい。回転ロー
ラFG出力と供給リ−/l/FGと巻取り−ルFG出力
よシ算呂した結果により、基準周波数発生器の周波数を
滑らかに補正するので、テープ設定速度に安定に保つこ
とができる。
Operation With the above-described configuration, the present invention directly controls the frequency and power of both the supply reel and take-up reel FG, and since no slippage occurs between the tape and the reel, the control gain can be maintained υ
It can be raised and controlled stably. Additionally, the tape speed can be changed by changing the frequency of the reference frequency generator. The frequency of the reference frequency generator is smoothly corrected based on the result of combining the rotating roller FG output, the supply reel /l/FG, and the take-up reel FG output, so it is possible to stably maintain the tape set speed. .

実施例 以下、本発明の一実施例について第1図および第2図を
参照しながら説明する。
EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIGS. 1 and 2.

第1図は本発明のテープ速度制御装置の一実施例を示す
ブロック図である。第1図において1は供給リール、2
は巻取リール、3はモータ、4は駆動ベルトであシ、巻
取リール2はモータ3から駆動ベルト4を介して駆動さ
れるようになっている。9は供給リールのFG、10は
巻取リールのFGである。FGeおよび1oの圧力は周
波数比較器13の入力端子131,132にそれぞれ入
力される。一方、基準周波数発生器14の出力141は
周波数比較器13の入力端子134に与えられ、圧力端
子133には入力端子131と132の各侶号の周波数
の和と入力端子134の周波数との差に相当する出力が
得られる。この出力はさらに回転速度制御回路12の入
力端子121に与えられ、結果として供給リール1のF
G出力91と巻取リー/I/2のFG出力101の周波
数の和と基準周波数発生器の出力141の周波数を等し
くするように巻取リ−/L/2の回転速度を制御する。
FIG. 1 is a block diagram showing an embodiment of the tape speed control device of the present invention. In Figure 1, 1 is the supply reel, 2
3 is a take-up reel, 3 is a motor, and 4 is a drive belt. The take-up reel 2 is driven by the motor 3 via the drive belt 4. 9 is a supply reel FG, and 10 is a take-up reel FG. The pressures of FGe and 1o are input to input terminals 131 and 132 of the frequency comparator 13, respectively. On the other hand, the output 141 of the reference frequency generator 14 is given to the input terminal 134 of the frequency comparator 13, and the difference between the sum of the frequencies of the input terminals 131 and 132 and the frequency of the input terminal 134 is applied to the pressure terminal 133. The output corresponding to is obtained. This output is further given to the input terminal 121 of the rotational speed control circuit 12, and as a result, the F of the supply reel 1 is
The rotational speed of the take-up reel /L/2 is controlled so that the sum of the frequencies of the G output 91 and the FG output 101 of the take-up reel /I/2 is made equal to the frequency of the output 141 of the reference frequency generator.

基準周波数発生器14は補正信号入力端子142があシ
、この端子に与えられる指令によりテープ7の速度を変
えることができる。そこで回転ローラθのFG出力11
1と供給’J−=/L’1のFG出力91と巻取リー/
L’ 2 (7) F G出力101を周波数補正回路
8の3入力端子81,82.83にそれぞれ入力し、周
波数補正回路8にて補正量を算出する。この補正の目的
はテープの移動に伴うテープ速度の補正であシ、連応性
は必要外いため大時定数を有する回路を通して基準周波
数発生器14の補正信号入力端子142に入力すること
によりテープを希望速度に安定に保つことができる。
The reference frequency generator 14 has a correction signal input terminal 142, and the speed of the tape 7 can be changed by a command given to this terminal. Therefore, FG output 11 of rotating roller θ
1 and supply 'J-=/L'1's FG output 91 and take-up Lee/
L' 2 (7) FG The G output 101 is input to the three input terminals 81, 82, and 83 of the frequency correction circuit 8, respectively, and the frequency correction circuit 8 calculates the correction amount. The purpose of this correction is to correct the tape speed as the tape moves, and since continuity is not necessary, the tape is input to the correction signal input terminal 142 of the reference frequency generator 14 through a circuit with a large time constant. The speed can be kept stable.

第2図は本発明の今一つの実施例であって、ここで供給
IJ −/l/ 1のテープ巻半径9巻取す−/l/2
のテープ巻半径9圓転ローラ6の半径をそれぞれrs+
ri’mとし、供給り−/l/ F G 9 、  巻
取り一ルFG10.回転ローラFG11の歯数(回転数
を周波数に変換するための歯車状円盤の歯数)をそれぞ
れ”s”t”mとし、n5=ntとする。周波数比較器
13において、1301〜1303はパルス幅が等しい
単安定マルチバイブレータ(単安定マルチと記す)であ
るが、13o3のみ出力の極性が反転している。抵抗1
304〜1306は同じ抵抗値、抵抗1307〜130
9は同じ抵抗値、コンデンサ1310〜1312は同じ
容量値であわ、この周波数比較器13の出力133には
(基準周波数発生器14の周波数−供給リール1FG周
波数−巻取リール2FG周波数)に比例した信号が得ら
れ、回転速度制御回路12を通して巻取り−ル2の回転
数を制御する。このため基準周波数発生器の周波数によ
ってテープ7の速度を制御することができる。
FIG. 2 shows another embodiment of the present invention, in which a tape of supply IJ -/l/1 is wound with a radius of 9 -/l/2.
The tape winding radius 9 The radius of the rotating roller 6 is rs +
ri'm, supply -/l/FG 9, winding one FG10. Let the number of teeth of the rotating roller FG11 (the number of teeth of the gear-like disk for converting the number of rotations into a frequency) be "s"t"m, and n5=nt. In the frequency comparator 13, 1301 to 1303 are pulses. It is a monostable multivibrator with equal width (referred to as monostable multi), but only 13o3 has reversed output polarity.Resistance 1
304-1306 have the same resistance value, resistance 1307-130
9 has the same resistance value, and capacitors 1310 to 1312 have the same capacitance value. A signal is obtained and controls the rotational speed of the winding wheel 2 through a rotational speed control circuit 12. Therefore, the speed of the tape 7 can be controlled by the frequency of the reference frequency generator.

テープ速度Vと基準周波数fとの関係は、f=vns(
1/r、+1/wt)/2+r   −−(1)で示さ
れる。
The relationship between tape speed V and reference frequency f is f=vns(
1/r, +1/wt)/2+r --(1).

ここで、mllを供給!J−#IFG周波数と回転ロー
ラeFG周波数との比mtを巻取リール2FG周波数と
回転ローラsFG周波数との比とすると、ms=(rm
/rs)(n8/!m) ” t = (rm/rt ) (” t/nvQ) 
= (Tm”t ) (”s /”m )となる。
Supply mll here! J-#If the ratio mt of the IFG frequency and the rotating roller eFG frequency is the ratio of the take-up reel 2FG frequency and the rotating roller sFG frequency, then ms=(rm
/rs) (n8/!m) ” t = (rm/rt) (” t/nvQ)
= (Tm"t) ("s/"m).

In 、 、 tn tを用いてテープ速度Vと基準周
波数fとの関係を表わすと、 f−(vn、、/2πrrQ)(ms+1nt)  −
(2)となる。
Expressing the relationship between the tape speed V and the reference frequency f using In, , tnt, f-(vn,,/2πrrQ)(ms+1nt)-
(2) becomes.

そこで、周波数補正回路8において、回転ローラFG圧
力111.供給リールFG出力919巻取リールFG出
力101をそれぞれ入力端子81゜82.83よ多入力
し、演算回路801にてm8と町の和(m 、+m □
を算呂する。この出力をデジタルアナログ変換回路80
2にニジアナログ信号に変換し、さらに抵抗8o3.コ
ンデンサ804よυ構成される時定数回路を通し、出力
端子84に圧力する。出力端子84は基準周波数発生器
14の補正信号入力端子142に接続されるため、前述
したように基準周波数発生器14の周波数fをf=(v
nm/2π輸)(m、十mt)となるように設定すれば
テープ速度がVとなるように制御することができる。
Therefore, in the frequency correction circuit 8, the rotating roller FG pressure 111. A supply reel FG output 919 and a take-up reel FG output 101 are input to input terminals 81, 82, and 83, respectively, and an arithmetic circuit 801 calculates the sum of m8 and town (m, +m □
to calculate. This output is converted into a digital-to-analog conversion circuit 80.
2 to a rainbow analog signal, and further resistors 8o3. Pressure is applied to the output terminal 84 through a time constant circuit composed of a capacitor 804 and υ. Since the output terminal 84 is connected to the correction signal input terminal 142 of the reference frequency generator 14, the frequency f of the reference frequency generator 14 is set as f=(v
The tape speed can be controlled to be V by setting it so that it becomes nm/2π transport) (m, 10 mt).

ここでテープ7が外乱などにより、回転ローラ6よシ浮
いた場合、演算回路801の出力は一瞬乱れるが、抵抗
803.コンデンサ804により構成される時定数回路
により、周波数補正回路8の出力84に急には変化せず
、従来のようなハンチングの発生の虞はない。
If the tape 7 floats above the rotary roller 6 due to a disturbance or the like, the output of the arithmetic circuit 801 will be momentarily disturbed, but the resistor 803. Due to the time constant circuit constituted by the capacitor 804, the output 84 of the frequency correction circuit 8 does not change suddenly, and there is no possibility of hunting occurring as in the conventional case.

このように本発明の実施例のテープ速度制御装置によれ
ば、テープ速度を一定にするように巻取リール回転速度
を制御するため、供給!J ++ lvlのFG周波数
と巻取’)−/L/2のFG周波数の和と比較する基準
周波数を(供給IJ−#FG周波数/回転ローラFG周
波数)と(巻取り−/L7F G周波数/回転ローラF
G周波数)の和を演算して補正するように配しであるの
で、テープ速度は安定に高精度に制御できる。
As described above, according to the tape speed control device of the embodiment of the present invention, the take-up reel rotational speed is controlled so as to keep the tape speed constant. The reference frequency to be compared with the sum of the FG frequency of J ++ lvl and the FG frequency of (winding) -/L/2 is (supply IJ-#FG frequency/rotating roller FG frequency) and (winding-/L7FG frequency/ Rotating roller F
Since the arrangement is such that correction is made by calculating the sum of G frequencies, the tape speed can be controlled stably and with high precision.

なお、本実施例ではモータは巻取リールを駆動するよう
に示したが、これは供給リールを駆動しても同様の作用
が得られる。
In this embodiment, the motor is shown to drive the take-up reel, but the same effect can be obtained even if the motor drives the supply reel.

発明の効果 以上の実施例から明らかなように、本発明によれば、供
給リールのFG周波数と巻取リールのFG周波数の和と
比較する基準周波数を、供給り、/1zFG周波数と回
転ローラFQ周波数の比と巻取!7−1v F G 8
波数と回転ローラFG周波数の比との和を演算して補正
するように構成しであるからテープ速度が高精度に安定
に制御し得るテープ速度制御装置を提供できる。
Effects of the Invention As is clear from the above embodiments, according to the present invention, a reference frequency for comparison with the sum of the FG frequency of the supply reel and the FG frequency of the take-up reel is supplied, and the difference between /1zFG frequency and rotating roller FQ is supplied. Frequency ratio and winding! 7-1v FG 8
Since the configuration is configured to calculate and correct the sum of the wave number and the ratio of the rotating roller FG frequency, it is possible to provide a tape speed control device that can stably control the tape speed with high precision.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明の一実施例におけるテープ速度制御装置
のブロック図、第2図は本発明の今一つの実施例のブロ
ック図、第3図は従来のテープ速度制御装置のブロック
図である。 1・・・・・・供給リール、2・・・・・・巻取リール
、3・・・・・・モータ、4・・・・・・駆動ベルト、
6・・・・・・回転ローラ、7・・・・・・テープ、8
・・・・・・周波数補正回路、9・・・・・・供給!J
 −/L/F G、  1o−−−−−・巻取!J−/
l/FG111−・・・回転ローラFG、12・・・・
・・回転速度制御回路、13・・・・・・周波数比較器
、14・・・・・・基準周波数発生器。
FIG. 1 is a block diagram of a tape speed control device according to one embodiment of the present invention, FIG. 2 is a block diagram of another embodiment of the present invention, and FIG. 3 is a block diagram of a conventional tape speed control device. 1... Supply reel, 2... Take-up reel, 3... Motor, 4... Drive belt,
6...Rotating roller, 7...Tape, 8
...Frequency correction circuit, 9...Supply! J
-/L/FG, 1o----- Winding! J-/
l/FG111-...Rotating roller FG, 12...
... Rotation speed control circuit, 13 ... Frequency comparator, 14 ... Reference frequency generator.

Claims (2)

【特許請求の範囲】[Claims] (1)供給リールのFGと、巻取リールのFGと、基準
周波数発生器と、前記供給リールのFG出力と前記巻取
リールのFG出力の両周波数の和と前記基準周波数発生
器の周波数を比較する周波数比較器と、前記周波数比較
器の出力により前記供給リール又は前記巻取リールの少
なくとも一方を駆動する回転速度制御手段と、前記供給
リールと前記巻取リールとの間で走行するテープに接触
して回転するように配設されたテープ走行速度検出用回
転ローラと、前記回転ローラの回転速度を検出する回転
ローラFGと、前記供給リールのFG出力と前記巻取リ
ールのFG出力と前記回転ローラFG出力とを入力とす
る前記基準周波数発生器の発生周波数を補正する周波数
補正回路とを備えてなるテープ速度制御装置。
(1) FG of the supply reel, FG of the take-up reel, a reference frequency generator, the sum of the frequencies of the FG output of the supply reel and the FG output of the take-up reel, and the frequency of the reference frequency generator. a frequency comparator for comparison; a rotational speed control means for driving at least one of the supply reel or the take-up reel based on the output of the frequency comparator; and a tape running between the supply reel and the take-up reel. a rotating roller for detecting tape running speed arranged to rotate in contact with each other, a rotating roller FG for detecting the rotational speed of the rotating roller, an FG output of the supply reel, an FG output of the take-up reel, and a rotating roller FG for detecting the rotation speed of the rotating roller; and a frequency correction circuit that corrects the frequency generated by the reference frequency generator, which inputs the output of the rotating roller FG.
(2)周波数補正回路は出力部に時定数回路を備えてな
る請求項(1)記載のテープ速度制御装置。
(2) The tape speed control device according to claim (1), wherein the frequency correction circuit includes a time constant circuit at the output section.
JP2292307A 1990-10-29 1990-10-29 Tape speed controller Pending JPH04163754A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2292307A JPH04163754A (en) 1990-10-29 1990-10-29 Tape speed controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2292307A JPH04163754A (en) 1990-10-29 1990-10-29 Tape speed controller

Publications (1)

Publication Number Publication Date
JPH04163754A true JPH04163754A (en) 1992-06-09

Family

ID=17780073

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2292307A Pending JPH04163754A (en) 1990-10-29 1990-10-29 Tape speed controller

Country Status (1)

Country Link
JP (1) JPH04163754A (en)

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