JPS5564675A - Measuring method for tape run time - Google Patents
Measuring method for tape run timeInfo
- Publication number
- JPS5564675A JPS5564675A JP13585378A JP13585378A JPS5564675A JP S5564675 A JPS5564675 A JP S5564675A JP 13585378 A JP13585378 A JP 13585378A JP 13585378 A JP13585378 A JP 13585378A JP S5564675 A JPS5564675 A JP S5564675A
- Authority
- JP
- Japan
- Prior art keywords
- tape
- reel
- time
- take
- run speed
- 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
Links
Landscapes
- Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
Abstract
PURPOSE: To display the remaining time of a VTR tape, etc., without reference to a rapid traverse tape speed, etc., by detecting the tape run speed from a difference in period of continuous double rotation of a take-up reel.
CONSTITUTION: The rotation period of a supply reel or take-up reel is measured twice continuoulsy and a tape run speed is obtained by the expression of measured values Δt(n) and Δt(n+1), and tape thickness D given by v=2πD/[Δt(n+1)- Δt(n)]. This run speed and detection values of rotation angular speeds of the take- up and supply reels are inputted to a microcomputer, so that remaining time T1 of the supply reel can be displayed as not the rotational frequency of the reel but time with good precision. Total tape time T0 may be inputted previously and use time T2 can be displayed as T0-T1=T2.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13585378A JPS5564675A (en) | 1978-11-06 | 1978-11-06 | Measuring method for tape run time |
US06/090,610 US4338645A (en) | 1978-11-06 | 1979-11-02 | Tape running time indication system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13585378A JPS5564675A (en) | 1978-11-06 | 1978-11-06 | Measuring method for tape run time |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5564675A true JPS5564675A (en) | 1980-05-15 |
Family
ID=15161291
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13585378A Pending JPS5564675A (en) | 1978-11-06 | 1978-11-06 | Measuring method for tape run time |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5564675A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61150178A (en) * | 1984-12-24 | 1986-07-08 | Sony Corp | Reproducing device |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS589502A (en) * | 1981-07-09 | 1983-01-19 | Mitsubishi Electric Corp | Control device in rolling stock |
-
1978
- 1978-11-06 JP JP13585378A patent/JPS5564675A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS589502A (en) * | 1981-07-09 | 1983-01-19 | Mitsubishi Electric Corp | Control device in rolling stock |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61150178A (en) * | 1984-12-24 | 1986-07-08 | Sony Corp | Reproducing device |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS54145513A (en) | Recorder-reproducer | |
JPS5564675A (en) | Measuring method for tape run time | |
JPS539104A (en) | Cassette tape running speed detector | |
JPS5564674A (en) | Measuring method for tape run time | |
JPS5564673A (en) | Display system for tape run time of tape recorder | |
JPS57137258A (en) | Winding-amount detection device for tape-shaped material | |
JPS55122104A (en) | Device for measuring length | |
FR2392914A1 (en) | Tape recorder tape transfer control - has toothed wheels with detectors for each spool to provide tape position indication | |
JPS5641569A (en) | Display system for remainder time of cassette tape | |
JPS5446016A (en) | Magnetic recorder-reproducer | |
JPS55122102A (en) | Device for measuring length | |
JPS51117611A (en) | Tape thickness detecting unit | |
JPS5564676A (en) | Measuring method for tape run time | |
JPS5341211A (en) | Remaining tape quantity indicator | |
JPS57138074A (en) | Detector for tape winding amount | |
JPS5564677A (en) | Display unit for tape run time | |
JPS5451509A (en) | Counter device of tape recorders | |
JPS5264958A (en) | Tape position detecting system | |
JPS5492312A (en) | Tape position display means of cassette tape recorder | |
JPS5476112A (en) | Automatic program searching method of cassette tape recorder | |
JPS5644142A (en) | Tape take-up unit | |
JPS54125054A (en) | Mean plate thickness measuring apparatus | |
JPS5690476A (en) | Display circuit of tape recorder | |
JPS51117608A (en) | Tape quantity detecting unit | |
JPS56117380A (en) | Display device for tape run time |