JPS57138074A - Detector for tape winding amount - Google Patents

Detector for tape winding amount

Info

Publication number
JPS57138074A
JPS57138074A JP2331181A JP2331181A JPS57138074A JP S57138074 A JPS57138074 A JP S57138074A JP 2331181 A JP2331181 A JP 2331181A JP 2331181 A JP2331181 A JP 2331181A JP S57138074 A JPS57138074 A JP S57138074A
Authority
JP
Japan
Prior art keywords
tape
reel hub
revolution
time
winding
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
Application number
JP2331181A
Other languages
Japanese (ja)
Other versions
JPH0158590B2 (en
Inventor
Takashi Nishida
Hiromi Juso
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.)
Sharp Corp
Original Assignee
Sharp 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 Sharp Corp filed Critical Sharp Corp
Priority to JP2331181A priority Critical patent/JPS57138074A/en
Publication of JPS57138074A publication Critical patent/JPS57138074A/en
Publication of JPH0158590B2 publication Critical patent/JPH0158590B2/ja
Granted 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

  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)

Abstract

PURPOSE:To detect the tape winding amount accurately and quickly, by obtaining a tape average thickness from a time which rotates a tape of reel hub by one and a time rotating one revolution of the tape at a constant speed after winding in a high speed. CONSTITUTION:The revolution of a reel hub 1 is delivered to a synchronizing rotating body 3, and electric signal corresponding to the number of revolutions is induced at a Hall element 4 located near the body 3 and it is processed at an arithmetic controller 6. With this constitution, a time requiring for one revolution of the reel hub 1 at the reproducing mode is measured. Then, at the fast forward mode, when the reel hub 1 rotates by 30 revolutions, the mode is changed again to the reproducing mode, and the time required for one revolution of the reel hub 1 at constant speed is measured, and the both is processed at a computer 6 with a prescribed Equation to calculate the tape thickness DELTA. The number of windings N and the timing position T can also be calculated and displayed at 8. Thus, the amount of winding can accurately and quickly be detected.
JP2331181A 1981-02-18 1981-02-18 Detector for tape winding amount Granted JPS57138074A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2331181A JPS57138074A (en) 1981-02-18 1981-02-18 Detector for tape winding amount

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2331181A JPS57138074A (en) 1981-02-18 1981-02-18 Detector for tape winding amount

Publications (2)

Publication Number Publication Date
JPS57138074A true JPS57138074A (en) 1982-08-26
JPH0158590B2 JPH0158590B2 (en) 1989-12-12

Family

ID=12107036

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2331181A Granted JPS57138074A (en) 1981-02-18 1981-02-18 Detector for tape winding amount

Country Status (1)

Country Link
JP (1) JPS57138074A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57143772A (en) * 1981-02-27 1982-09-06 Pioneer Electronic Corp Tape amount detecting system
JPS62501805A (en) * 1985-02-08 1987-07-16 ドイチエ　トムソン−ブラント　ゲゼルシヤフト　ミツト　ベシユレンクテル　ハフツング How to detect elapsed and/or still usable recording/playback time on magnetic tape
EP0741901A1 (en) * 1993-12-15 1996-11-13 KWOH, Daniel S. Method and apparatus for determining addresses in time along a recording tape

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54158912A (en) * 1978-06-05 1979-12-15 Pioneer Electronic Corp Device for detecting tape amount

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54158912A (en) * 1978-06-05 1979-12-15 Pioneer Electronic Corp Device for detecting tape amount

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57143772A (en) * 1981-02-27 1982-09-06 Pioneer Electronic Corp Tape amount detecting system
JPH0226313B2 (en) * 1981-02-27 1990-06-08 Pioneer Electronic Corp
JPS62501805A (en) * 1985-02-08 1987-07-16 ドイチエ　トムソン−ブラント　ゲゼルシヤフト　ミツト　ベシユレンクテル　ハフツング How to detect elapsed and/or still usable recording/playback time on magnetic tape
EP0741901A1 (en) * 1993-12-15 1996-11-13 KWOH, Daniel S. Method and apparatus for determining addresses in time along a recording tape
EP0741901A4 (en) * 1993-12-15 1997-07-16 Daniel S Kwoh Method and apparatus for determining addresses in time along a recording tape

Also Published As

Publication number Publication date
JPH0158590B2 (en) 1989-12-12

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