JPS6013378A - Display device of residual recording time - Google Patents

Display device of residual recording time

Info

Publication number
JPS6013378A
JPS6013378A JP12082383A JP12082383A JPS6013378A JP S6013378 A JPS6013378 A JP S6013378A JP 12082383 A JP12082383 A JP 12082383A JP 12082383 A JP12082383 A JP 12082383A JP S6013378 A JPS6013378 A JP S6013378A
Authority
JP
Japan
Prior art keywords
time
remaining amount
display device
recording time
remaining
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
JP12082383A
Other languages
Japanese (ja)
Inventor
Takahiro Nakai
中井　隆洋
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP12082383A priority Critical patent/JPS6013378A/en
Publication of JPS6013378A publication Critical patent/JPS6013378A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/34—Indicating arrangements 
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/11—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information not detectable on the record carrier
    • G11B27/13—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information not detectable on the record carrier the information being derived from movement of the record carrier, e.g. using tachometer
    • G11B27/17—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information not detectable on the record carrier the information being derived from movement of the record carrier, e.g. using tachometer using electrical sensing means
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/90—Tape-like record carriers

Landscapes

  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)

Abstract

PURPOSE:To display precise residual time almost without influence caused by a reel diamater measuring error due to uneven winding of a reel or eccentricity by using a residual time correcting device. CONSTITUTION:It is supposed that the optimum estimation value Tn-1 at the point tn-1 of time preceding to the current point tn by DELTAt is obtained in the residual time correcting device 6. A delay element 10 holds and delays the Tn-1 by DELTAt and sends the delayed signal and an adder 11 calculates T'n on the basis of relation 16. Then, a multiplier 12 multiplies the T'n by - to obtain a code- inverted -T'n and an adder 7 adds the -T'n to the calculated residual time Yn obtained at the time tn. A multiplexer 8 multiplies the added value (Yn-T'n) by a correcting factor Pn or P=(-1+5<1/2>)/2 and an adder 9 adds the multiplied value Pn(Yn-T'n) or P(Yn-T'n) to the value T'n obtained by the adder 11. Thus, the optimum estimation value Tn at the point tn of time is outputted and displayed on a display device 4.

Description

【発明の詳細な説明】 この発明は情報記録媒体の残量記録時間表示装置に関す
るもので、特にその表示時間精度の改善に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a remaining recording time display device for an information recording medium, and particularly to improving the display time accuracy thereof.

従来の残量記録時間表示装置で、たとえば磁気テープ残
量時間表示装置は第１図に示すような構成となっていた
。磁気テープは供給側リール１がら巻取り側リール２へ
巻取られ、テープ残量時間計算装置３によって算出され
た残量時間は残量時間表示部４に表示される。A conventional remaining recording time display device, for example, a magnetic tape remaining recording time display device has a configuration as shown in FIG. The magnetic tape is wound from the supply reel 1 to the take-up reel 2, and the remaining amount time calculated by the tape remaining amount time calculation device 3 is displayed on the remaining amount time display section 4.

次にこの残量時間表示装置の動作について説明する。第
２図は、テープが巻取られている様子を上から見たもの
である。ハブ５に巻かれたテープは供給側リール１から
巻取り側リール２へと矢印の方向に一定の速度で巻取ら
れていく。この過程において、供給側リール１の半径を
ｒ＋７、巻取り側リール２の半径をｒ、とし、ハブ５の
半径をｒＱとの関係にあるので、第２図において斜線部
の面積となる。ここで、テープ長さを表わず時間、すな
わちテープを巻き始めてから巻き終わりまで一定の速度
Ｖで巻取るのに要する時間をＴｏとすれば、の関係にあ
る。Next, the operation of this remaining amount time display device will be explained. FIG. 2 is a top view of the tape being wound. The tape wound around the hub 5 is wound at a constant speed from the supply reel 1 to the take-up reel 2 in the direction of the arrow. In this process, the radius of the supply reel 1 is r+7, the radius of the take-up reel 2 is r, and the radius of the hub 5 is rQ, so the area is the shaded area in FIG. Here, if time is not expressed as the tape length, that is, the time required to wind the tape at a constant speed V from the start to the end of winding, then the relationship is as follows.

関係式（３）において、ｒＱ　どＴｏは既知の定数であ
るので、残量時間Ｔ、を知るには、供給側リール半径ｒ
オと巻取り側リール半径ｒ１とを時々刻々検出できれば
よい。このｒｌとｒしとを検出する手段については過去
に様々な手段が考えられているが、一般には磁気的ある
いは光学的手段によるリールの回転周期τを検出し、既
知のテープ速度Ｖを用いて間接的にリール半径ｒを検出
している。In relational expression (3), since rQ and To are known constants, in order to know the remaining amount time T, the supply side reel radius r
It is only necessary to detect the radius r1 of the take-up reel from time to time. Various means have been considered in the past for detecting rl and r, but in general, the rotation period τ of the reel is detected by magnetic or optical means, and the known tape speed V is used to detect the reel rotation period τ. The reel radius r is indirectly detected.

すなわちリールの回転角周波数をωとずれば、ｒ＝Ｖ／
ω　（４） ω−２π／τ　（５） であるから、リールの回転周期τとリール半径ｒの関係
は ｒ−ｖτ／２π　（６） となる。In other words, if the rotational angular frequency of the reel is shifted from ω, r=V/
ω (4) ω−2π/τ (5) Therefore, the relationship between the rotation period τ of the reel and the reel radius r is r−vτ/2π (6).

こうして検出されたリールの回転周期τから得られるｒ
９およびｒｔ、によって式（３）の関係からテープの残
量時間ＴＲが得られ、この値が第１図の表示部４に表示
される。r obtained from the rotation period τ of the reel detected in this way
9 and rt, the remaining tape time TR is obtained from the relationship of equation (3), and this value is displayed on the display section 4 in FIG.

しかしながら上記のような関係に従って算出された残量
時間は、たとえばリールの巻きむらや偏心などによって
、リール径の検出値の変化割合に時間的変動がある場合
、この影響を受けて誤差が大きくなる。また、残量時間
表示装置の分解能はリール径検出時の分解能で決定され
てしまうため、テープ厚が薄い場合％’）テープ速度が
遅い場合などでリール径の時間変化が小さいとき、従来
の残量時間表示装置ではせいぜい分刻みの表示しかでき
ず、しかも精度の悪いものであった。However, if there is a temporal variation in the rate of change in the detected value of the reel diameter due to, for example, uneven winding or eccentricity of the reel, the remaining time calculated according to the above relationship will be affected by this and will have a large error. In addition, since the resolution of the remaining amount time display device is determined by the resolution at the time of detecting the reel diameter, if the tape thickness is thin (%') and the tape speed is slow and the time change in the reel diameter is small, the conventional remaining amount Quantity/time display devices could only display minutes at best, and had poor accuracy.

この発明の主たる目的は、上述のような欠点ないし問題
点を解消し、残量時間計算装置によって算出された値を
もとに、さらに高精度かつ高分解能で残量時間を推定す
る機能を有する補正手段を備えた残量記録時間表示装置
を提供することにある。The main purpose of the present invention is to solve the above-mentioned drawbacks and problems, and to have a function of estimating the remaining amount of time with higher accuracy and resolution based on the value calculated by the remaining amount of time calculation device. An object of the present invention is to provide a remaining amount recording time display device equipped with a correction means.

以下にこの発明の一実施例を第３図に示す。第３図は第
１図の残量時間計算装置Ｉ３と残量時間表示装置４との
間に、残量時間補正袋！６を入れたテープ残量時間表示
装置である。残量時間補正袋５− 置６は加算器７．９．１１と乗算器８．１２および入力
データをΔ【だけ遅らせる遅延素子１０によって構成さ
れている。An embodiment of the present invention is shown in FIG. 3 below. FIG. 3 shows a remaining amount time correction bag between the remaining amount time calculation device I3 and the remaining amount time display device 4 of FIG. This is a tape remaining time display device with a number 6 on it. The remaining time correction bag 5-6 is composed of an adder 7.9.11, a multiplier 8.12, and a delay element 10 that delays input data by Δ.

以下にこの残量時間表示装置の原理および動作について
説明する。The principle and operation of this remaining amount time display device will be explained below.

テープ走行開始時点を基準とした時刻ｔと真の残量時１
１１Ｔとの和は、テープ速度が一定である限り一定であ
り、この関係は ７−＋ｔ　−ａ　（ａは定数）　（７）で表わされる。Time t and true remaining amount time 1 based on the tape running start point
The sum with 11T is constant as long as the tape speed is constant, and this relationship is expressed as 7-+t-a (a is a constant) (7).

また、残量時間の推定は連続的に行なう必要はないので
、残量時間補正袋Ｗ１６はテープが一定速度Ｖで走行を
始め、残量時間計算装置によって最初に残量時間が計算
された時刻をｔ、−Δｔとし、以後Δを間隔で動作させ
るものとする。残量時間補正装置がｎ回目の動作をする
時刻ｔｎ−ｎ　・Δｔにおける真の残ｍ時間をＴ。どす
れば、ｎの値にかかわらず関係式（７）から Ｔｎ＝ａ　−ｔ　ｎ　（８） Ｔｎｎ＝ａ　ｊｎ＋＋　（９） ６− したがって Ｔ　０＋　−Ｔ。−’ｔ　ｎ　’　ｔ　ｎ）１−−Δｔ
　（１０）の関係が成立する。づな、１″）ち、時刻ｔ
１．ｌ＋１と時刻ｔ。における真の残Ｍ時間丁。、と王
。どの関係は丁１）１１　＝　Ｔ　ｎ　”−△ｔ　（１
１）となる。In addition, since the remaining amount time does not need to be estimated continuously, the remaining amount time correction bag W16 is calculated at the time when the tape starts running at a constant speed V and the remaining amount time is first calculated by the remaining amount time calculation device. are assumed to be t and −Δt, and the operation is thereafter performed at intervals of Δ. T is the true remaining m time at time tn-n·Δt when the remaining time correction device performs the nth operation. Regardless of the value of n, from relational expression (7), Tn=a −t n (8) Tnn=a jn++ (9) 6− Therefore, T 0+ −T. -'t n 't n)1--Δt
The relationship (10) holds true. Zuna, 1″) Time t
1. l+1 and time t. The true remaining M time in . , said the king. Which relationship is D1)11 = T n ”−△t (1
1).

一方、残恐時間計暉装置３にて算出された時刻１、にお
ける算出残量時間Ｙ。は、既に述べた種々の原因により
無視することができない程度の誤差を含んでいる。そこ
で算出残Ｍ時間）ｌｏというものを Ｙｎ　−Ｔｎ　十Ｗｎ　（１２） Ｔ　１Ｎ＋　−”ｒ　ｎ　−Δｔ　４−　Ｚ　１１　（
１３）の関係、すなわち誤差ｔＶ　、を含む測定過！！
ｉ！　（１２＞および誤％ｚ。を含む信号生成過程（１
３）からなる関係にあるとすることが可能である。但し
、ｚｎ　＋　Ｗ　ｎは平均値Ｏの白色ノイズであり、′
ｌ。On the other hand, the calculated remaining amount time Y at time 1 calculated by the remaining time measuring device 3. contains errors that cannot be ignored due to the various causes already mentioned. Therefore, the calculation remaining M time) lo is Yn −Tn 10Wn (12) T 1N+ −”r n −Δt 4− Z 11 (
13), that is, the measurement error including the error tV! !
i! (12> and the signal generation process (1
3). However, zn + W n is white noise with an average value of O, and ′
l.

とＷｎとの間、およびそれらどＴ。＋Ｙｎ　との間は互
いに無相関であるとする。ずなわち２゜は確率変数であ
り、したがって（２ｏ−Δ１）もまた確率変数となる。and Wn, and those T. +Yn is assumed to have no correlation with each other. That is, 2° is a random variable, so (2o-Δ1) is also a random variable.

この確率変ｄｚ　ｎ−八１）をまとめてｕＩｌどおけば
、信号生成過程は Ｔｎｔ＋＝’ｒｎ　−１−ｕ　ｎ　（１４＞の関係で表
わされる。ここでＵ。は、平均値−Δｔの白色ノイズで
あることが明らかである。関係式〈１４）は制御工学の
分野では、状態方程式と呼ばれており、Ｔ、は状態量と
呼ばれている。If we put this random variation dz n - 81) together in uIl, the signal generation process is expressed by the relationship Tnt + = 'rn -1 - u n (14>), where U is the mean value - Δt. It is clear that this is white noise.Relational expression (14) is called an equation of state in the field of control engineering, and T is called a state quantity.

ここで注意すべきは、信号Ｔ０は関係式（１４）で表わ
されるグイナミクスで生成されることはわかっているが
、信号Ｔ１１そのものは観測できないということ、およ
び式（１２）によって生成されると考えられる信号Ｙ。What should be noted here is that although it is known that the signal T0 is generated by the Guinamitics expressed by the relational expression (14), the signal T11 itself cannot be observed, and it is thought that the signal T11 is generated by the equation (12). signal Y.

、すなわち残量時間計締装置３からの算出出力値Ｙ。の
みが観測できるということである。, that is, the calculated output value Y from the remaining amount time measuring device 3. This means that only the following can be observed.

さて、制御工学の分野では式（１４）と式（１２）の形
式で表視できる線形ダイナミカルシステムに対しては、
観測１！ＩＹｏをもとにして状態ｆｉＴ。の推定値下ｒ
１１それも真の値Ｔ。と推定値Ｔ。Now, in the field of control engineering, for linear dynamical systems that can be expressed in the form of equations (14) and (12),
Observation 1! State fiT based on IYo. Below the estimated value of r
11 That is also the true value T. and estimated value T.

との差の２乗平均を最小にするという意味での最適推定
値Ｔｎを得る機構を構築できることが知られてＪ−ンリ
、実際に関係式（１４）、（１２）に適用すれば Ｔｎ　＝　１−ｎ　＋　ｌ”ｎ　（Ｙｎ　−丁ｎ）　（
１５）のようになる。但し、 ｐｏ−’＝　（Ｐｌ、ｌ＋１）−’＋１　（１７）ｎ　
＝１．２．３．　・＝　（１８） である。Ｊ−たこの補正を始めるに当たって必要となる
初期値ＴｏＬ１、適当な実数をとればよく、たとえば最
初に残ｍ時間計算装置３から出力された値ＹＯを用いて
もよい。また同じ（初期値Ｐａについても、適当な非負
の実数を与えればＪ：＜、たとえば、数値Ｏあるいは数
値１を与えても構わない。これらの関係式において、Ｔ
ｎは前回の最適推定値Ｔ　ｈ−＋に基づく推定値であり
、Ｔｒｌは現時点での観測値Ｙ。を得た後のＴ。に基づ
く現時点での最適推定値である。またＰ。は、フィード
バックの利得と呼ばれる同で一種の補正係数と考えるこ
とができる。It is known that it is possible to construct a mechanism to obtain the optimal estimated value Tn in the sense of minimizing the root mean square of the difference between 1-n + l”n (Yn - ding n) (
15). However, po-'= (Pl, l+1)-'+1 (17)n
=1.2.3.・= (18). The initial value ToL1 necessary for starting the J-octopus correction may be an appropriate real number; for example, the value YO initially output from the remaining m time calculation device 3 may be used. The same is true (for the initial value Pa, J:<, for example, you can give a value O or a value 1 as long as you give an appropriate non-negative real number. In these relational expressions, T
n is an estimated value based on the previous optimal estimated value T h-+, and Trl is the current observed value Y. T after getting . This is the current best estimate based on Also P. can be thought of as a kind of correction coefficient called feedback gain.

ここで、関係式（１５）、（１６）、（１７）。Here, relational expressions (15), (16), and (17).

（１８）のアルゴリズムを遂行するのに必要なメモリは
、前回の最適推定値Ｔ　ｎ−＋と前回のフィードバック
ゲインＰ。−＋　８３　Ｊ：びΔｔなどのためのメモリ
だ（プで、ごくわずかであることがわかる。The memory required to execute the algorithm (18) is the previous optimal estimate T n-+ and the previous feedback gain P. -+ 83 J: Memory for Δt, etc. (You can see that it is very small.

次に、式（１７）中のＰ。はｎの増加とともに一定値Ｐ
に収束することが知られており、すなわちＰの値は式（
１７）においてＰ。　ｐ　ｎ−＋をＰで置き換えて得ら
れる方程式 ％式％（１９） の根となる。式（１９）の両辺にＰ（Ｐ＋１）を乗じて
整即すると Ｐ２＋Ｐ−１−０（２０） となり、Ｐは式（２０）の根でなければならないが、根
は２つあって Ｐ−（−１±Ｅ丁）／２　（２１） としてまる。ここでｐＨあるいはＰは非負であることが
知られているので、結局 Ｐ　−（−１＋　ｆ３−）　／　２　（２２）でなけれ
ばならない。そこで、関係式（１５）。Next, P in formula (17). becomes a constant value P as n increases
It is known that the value of P converges to the equation (
17) in P. p is the root of the equation obtained by replacing n-+ with P (19). Multiplying both sides of Equation (19) by P(P+1) to make it constant gives P2+P-1-0(20), and P must be the root of Equation (20), but there are two roots and P-( -1±E)/2 (21). Since pH or P is known to be non-negative here, it must be P - (-1+ f3-) / 2 (22) after all. Therefore, relational expression (15).

（１６）、（１７）、（１８）によって規定され１０− ている補正を行なうに当たって、Ｐｎの代わりに初めか
ら定数Ｐ＝　（−１＋ＪＴ”）／２を用いてもよい。こ
うすれば、Ｐの逐次計算過程を省くことができ、しかも
乗痺器にて乗する数値はずべて定数Ｐ−（−１＋ｉ）／
２でよく、逐次演葎の過程において、いちいち変更し−
Ｃいく必要がない。When performing the 10- correction prescribed by (16), (17), and (18), the constant P = (-1 + JT")/2 may be used from the beginning instead of Pn. In this way, P It is possible to omit the sequential calculation process of
2, and in the process of successive engravings, change each time.
There is no need to go to C.

以上述べた原理に基づいて規定される補正を行なうのが
第３図の補正装置６である。The correction device 6 shown in FIG. 3 performs the correction defined based on the principle described above.

次にこの残量時間補正装置６の動作について説明する。Next, the operation of this remaining amount time correction device 6 will be explained.

今、現時点［。よりΔを時間だ（プ前の時点１ｎ−４に
この装置からの出力１１′なわらｊ　ｌ＋Ｊにおける最
適推定値Ｔ　ｎ−＋が得られたとする。遅延素子１０は
このｒ　ｎ−＋をΔｔだけ保持遅延させて送り出し、関
係く１６）に基づいて加算器１１で王。を算出し、これ
に乗碑器１２にて−１を乗じて符号を反転させたーＴ。Right now, at the moment [. Let Δ be the time (suppose that the optimal estimate T n-+ at the output 11' from this device is obtained at the time 1n-4 before the time 1n-4).The delay element 10 converts this r n-+ to Δt The output is delayed and sent out by the adder 11 based on 16). was calculated, and this was multiplied by -1 in the multiplier 12 to invert the sign -T.

が加算器７で時点ｔｔｌで得られた算出残量時間Ｙｎに
加えられる。この加えられた（Ｙｎ　Ｔｎ）に補正係数
Ｐ。またはＰ＝（−１＋ｆ３−）７／２を乗簿器８で乗
じて、その値Ｐｎ１１′ｃｆ？られている値］−６を加
算器って加え合わすことにより時点ｔ。での関係式（１
５）による最適推定＋＊９゜が出力されて表示器４に表
示される。このにうにして、順次各時点におけるより正
確な最適推定値Ｔ。を次々と持ていくことがＣ８る。is added by the adder 7 to the calculated remaining amount time Yn obtained at time ttl. A correction factor P is added to this (Yn Tn). Or, multiply P=(-1+f3-)7/2 by multiplier 8 and obtain the value Pn11'cf? At time t, the sum of the values given]−6 is added using an adder. The relational expression (1
5) is output and displayed on the display 4. In this way, a more accurate optimal estimate T at each point in time is obtained in turn. It is C8 to bring one after another.

第４図は、経過時間ｔを横軸に、残量時間「を縦軸にと
って、Ｙ、とＴ、とをそれぞれ白丸と黒丸とで表わし、
この残量時間補正装置の＃ｌｌＩきを示したものである
。In FIG. 4, the elapsed time t is taken as the horizontal axis and the remaining amount time is taken as the vertical axis, and Y and T are represented by white circles and black circles, respectively.
This figure shows #llI of this remaining amount time correction device.

ところで、本実施例の残量時間表示装置の分解能は、１
４Ｌ定間隔Δｔを小ざくすることで、リール径検出器の
分解能とは無関係に高めることができる。換言ずれば、
本実施例では、リール径検出器の分解能や機械的精度が
低くても、それを十分に補うことができるため、やはり
高精度かつ高分解能で残量時間を表示することができる
。たとえばＶＨ８方式の磁気録画再生装置では堤在５分
単位程度でしか残量時間を表示できないが、本実施例に
よれば、１秒車位の表示も可能となる。しかも、本実施
例の残量記録時間表示装置に用いられる補正波Ｕ６は残
量時間計算装置３を構成している７１′クロコンピユー
タの内部に組み込むことができるため、従来の残量記録
時間表示装置に対して、新たな回路を付加することは全
く不要であり製品のロストアツプにつながらないばかり
か、リール径検出器の分解能や機械的精度が低くてもよ
いので逆にコスｊ−ダウンにつながる。By the way, the resolution of the remaining amount time display device of this embodiment is 1
By reducing the 4L constant interval Δt, it can be increased regardless of the resolution of the reel diameter detector. In other words,
In this embodiment, even if the resolution and mechanical accuracy of the reel diameter detector are low, it can be sufficiently compensated for, so that the remaining amount time can be displayed with high accuracy and high resolution. For example, in a VH8 type magnetic recording and reproducing device, the remaining time can only be displayed in units of about 5 minutes, but according to this embodiment, it is also possible to display the remaining time in units of 1 second. Moreover, since the correction wave U6 used in the remaining amount recording time display device of this embodiment can be incorporated into the 71' black computer constituting the remaining amount time calculating device 3, it is possible to incorporate the correction wave U6 into the remaining amount recording time display device of the present embodiment. It is completely unnecessary to add a new circuit to the device, and not only does it not lead to product loss, but the reel diameter detector may have low resolution and mechanical accuracy, which leads to a cost reduction.

なＪ３、上記実施例ではテープ残量時間表示装置につ（
Ｖ−ｃ　ｔＩｌ明したが、ディスクの残量時間表示装置
など本質的に関係式（７）を満たしている装置で７ｆｉ
ればこの残量時間補正装置６を適用できる。J3, in the above embodiment, the remaining tape time display device (
As mentioned above, 7fi is achieved with a device that essentially satisfies relational expression (7), such as a disc remaining amount time display device.
If so, this remaining amount time correction device 6 can be applied.

以上のように、この発明による残量記録時間表示装置に
よれば、残量時間計算装置にて算出された１直を用いて
、富に現在の最適な残量時間を残量時間補正装置を用い
て推定しているので、リールの巻きむらや偏心などに起
因するリール径の測定誤差に６はとんど影響されず、正
確な残量時間を表示することがひきる。さらに、本発明
の残量記録時間表示値Ｕに用いられる補正装置６は、残
量１３一 時間計褌装置３の構成とは無関係であるので、残量時間
計算装置３がいかなる方式で構成されていても、本発明
装置を適用することができる。As described above, the remaining amount recording time display device according to the present invention uses the first shift calculated by the remaining amount time calculation device to calculate the current optimal remaining amount by using the remaining amount time correction device. Since the estimation is made by using the reel, 6 is hardly affected by measurement errors in the reel diameter caused by uneven winding or eccentricity of the reel, and it is possible to accurately display the remaining amount time. Furthermore, since the correction device 6 used for the remaining amount recording time display value U of the present invention is unrelated to the configuration of the remaining amount 13-hour metering device 3, it does not matter how the remaining amount time calculation device 3 is configured. The device of the present invention can be applied even if

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

第１図は従来のテープ残量時間表示装置のブロック図で
ある。 ＠２図は、第１図のテープ部分を上から見た図である。 第３図は本発明の一実施例である残ｌ記録時間表示装置
のブロック図である。 第４図は各推定時間における算出残量時間Ｙ７と最適推
定残量時間゛「。どの関係を示したグラフである。 図において、１は供給側リール、２は巻取り側リール、
３は残量時間計締装置、４は表示器、５はハブ、６は残
量時間補正装置、７．９．１１は加算器、８，１２は乗
綽器、１０は遅延素子を示す。 なお、各図において同一符号は同一部分または同一内容
を示す。 １４−FIG. 1 is a block diagram of a conventional tape remaining time display device. Figure @2 is a top view of the tape portion in Figure 1. FIG. 3 is a block diagram of a remaining recording time display device which is an embodiment of the present invention. FIG. 4 is a graph showing the relationship between the calculated remaining amount time Y7 and the optimal estimated remaining amount time at each estimated time. In the figure, 1 is the supply side reel, 2 is the winding side reel,
Reference numeral 3 indicates a remaining time measuring device, 4 a display, 5 a hub, 6 a remaining time correcting device, 7.9.11 an adder, 8 and 12 a multiplier, and 10 a delay element. Note that in each figure, the same reference numerals indicate the same parts or the same contents. 14-

Claims (3)

【特許請求の範囲】[Claims] （１）　情報記録媒体の残量記録時間に関連する関係に
ある間接的状態」を検知する検知手段と、前記検知手段
によって検知された間接的状態量から前記関連する関係
に従って前記残量記録時間を算出する計算手段と、 前記計算手段によって算出された算出残量記録時間に含
まれる誤差を補正する補正手段と、前記補正手段によっ
て補正された値を最適推定残量記録時間として表示する
表示手段からなる残量記録時間表示装置。(1) A detection means for detecting an indirect state in a relationship related to the remaining recording time of the information recording medium, and determining the remaining recording time according to the related relationship from the indirect state quantity detected by the detection means. a calculation means for calculating the remaining amount recording time, a correction means for correcting an error included in the calculated remaining amount recording time calculated by the calculation means, and a display means for displaying the value corrected by the correction means as the optimal estimated remaining amount recording time. Remaining amount recording time display device consisting of. （２）　前記補正された値↑が、前記補正手段の動作開
始後の時刻ｔ。−〇Δｔにおける前記算出残量記録時間
Ｙｎと、当該表示装置に適した逐次推定時間間隔である
八を時間だけそれより前の時刻ｔｎ−＋−（ｎ−１）Δ
ｔにおける前記補正された値／ｆｎ−＋と Ｔ　ｎ　＝Ｔ　ｎ−＋−ΔＴ の関係にあり、補正係数Ｐ。は Ｐ　ｎ　”　＝　（Ｐ　ｎ−＋　千１　）　−’　＋　
１の関係にあって、初期値ＴｏおよびＰＤは当該表示装
置に適当な値に設定され←ることを特徴とする特許請求
の範囲第１項記載の残量記録時間表示装置。(2) The corrected value ↑ is the time t after the start of the operation of the correction means. - The calculated remaining amount recording time Yn at Δt and the time tn−+−(n−1)Δ that is 8 hours earlier, which is a sequential estimation time interval suitable for the display device.
The corrected value/fn-+ at t has a relationship of T n =T n-+ - ΔT, and the correction coefficient P. is P n ” = (P n-+ 1,000 1) −' +
1. The remaining amount recording time display device according to claim 1, wherein the initial values To and PD are set to values appropriate for the display device. （３）　前記補正係数Ｐ。とじて定数Ｐ＝（−１＋５＞
／２を用いることを特徴とする特許請求の範囲第２項記
載の残量記録時間表示装置。(3) The correction coefficient P. The constant P=(-1+5>
3. The remaining recording time display device according to claim 2, characterized in that /2 is used.
JP12082383A 1983-06-30 1983-06-30 Display device of residual recording time Pending JPS6013378A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12082383A JPS6013378A (en) 1983-06-30 1983-06-30 Display device of residual recording time

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12082383A JPS6013378A (en) 1983-06-30 1983-06-30 Display device of residual recording time

Publications (1)

Publication Number Publication Date
JPS6013378A true JPS6013378A (en) 1985-01-23

Family

ID=14795842

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12082383A Pending JPS6013378A (en) 1983-06-30 1983-06-30 Display device of residual recording time

Country Status (1)

Country Link
JP (1) JPS6013378A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4972288A (en) * 1987-03-13 1990-11-20 Mitsubishi Denki Kabushiki Kaisha Tape remaining time display system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4972288A (en) * 1987-03-13 1990-11-20 Mitsubishi Denki Kabushiki Kaisha Tape remaining time display system

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