JPS58176293U

JPS58176293U - Video tape recorder tape amount measuring device

Info

Publication number: JPS58176293U
Application number: JP7327882U
Authority: JP
Inventors: 鈴木　貞雄
Original assignee: 株式会社東芝
Priority date: 1982-05-19
Filing date: 1982-05-19
Publication date: 1983-11-25

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例を示す構成説明図、第２図
は供給リール、巻取りリールの巻回テープ量と残量時間
の関係を示す説明図、第３図は供給リール、巻取りリー
ルの巻回テープ量の比と残量時間の関係を示す説明図で
ある。１３．１４・・・・・・回転円板、１７．１８・・・・
・・回転検出装置、１９．２０・・・・・・回転速度測
定器、２１・・・・・・演算器、２２・・・・・・比較
器、２３・・・・・・データメモリ。Fig. 1 is an explanatory diagram showing the configuration of an embodiment of this invention; Fig. 2 is an explanatory diagram showing the relationship between the amount of tape wound on the supply reel and the take-up reel and the remaining amount time; It is an explanatory view showing the relationship between the ratio of the amount of tape wound on the take-up reel and the remaining amount time. 13.14...Rotating disk, 17.18...
... Rotation detection device, 19.20 ... Rotation speed measuring device, 21 ... Arithmetic unit, 22 ... Comparator, 23 ... Data memory.

Claims

[Scope of utility model registration request]

The first and second reels each detect the rotation of the supply reel and the take-up reel during loading, in which the tape is wound at a predetermined angle around a cylinder housing a rotating magnetic head, and generate pulses proportional to each rotation of both reels. a second rotation detection device, and first and second rotation speed measuring devices that measure the rotation speeds of the supply reel and the take-up reel, respectively, using pulses obtained from the first and second rotation detection devices; , the ratio of the rotational speeds V□ and ■□ corresponding to the respective reels obtained by the first and second rotational speed measuring devices (■11V
1) and a ratio (Dlld) of the wound tape diameter D1 on the supply reel side and the wound tape diameter d□ on the take-up reel side in accordance with the remaining amount time of the tape. A tape amount measuring device for a video tape recorder, comprising a data memory in which a plurality of data are recorded, and a comparator for determining which data in the data memory the calculation output of the calculation unit is closest to. .