JPS57147150A - Tape end detecting system - Google Patents

Tape end detecting system

Info

Publication number
JPS57147150A
JPS57147150A JP56031951A JP3195181A JPS57147150A JP S57147150 A JPS57147150 A JP S57147150A JP 56031951 A JP56031951 A JP 56031951A JP 3195181 A JP3195181 A JP 3195181A JP S57147150 A JPS57147150 A JP S57147150A
Authority
JP
Japan
Prior art keywords
circuit
tape end
detection
microprocessor
tape
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
JP56031951A
Other languages
Japanese (ja)
Inventor
Fumio Ito
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 JP56031951A priority Critical patent/JPS57147150A/en
Publication of JPS57147150A publication Critical patent/JPS57147150A/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
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B15/05—Control of operating function, e.g. switching from recording to reproducing by sensing features present on or derived from record carrier or container
    • G11B15/093—Control of operating function, e.g. switching from recording to reproducing by sensing features present on or derived from record carrier or container by sensing driving condition of record carrier, e.g. travel, tape tension

Abstract

PURPOSE:To avoid dispersion in a detection time with a simple constitution, by inputting a periodic on/off signal from a rotating detector to a microprocessor and making a tape end detection with a software processing. CONSTITUTION:A rotary magnet 10 interlocked with tape run, a rotating detector 12 generating an on/off signal periodically with the rotation, and a waveform processing circuit consisting of a differentiating circuit 20 and a switching circuit 22, are provided. Depending on an input signal directly or via the waveform processing circuit from the device 12 if it is within a reference time width or changing, a tape end is detected with a microprocessor 24. Thus, the number of components in the hardware can be reduced and the necessity of a rectifying circuit with a long time constant is avoided, allowing to decrease the end detecting time and to avoide the lowering in the accuracy of detection due to dispersion in the component characteristics.
JP56031951A 1981-03-06 1981-03-06 Tape end detecting system Pending JPS57147150A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56031951A JPS57147150A (en) 1981-03-06 1981-03-06 Tape end detecting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56031951A JPS57147150A (en) 1981-03-06 1981-03-06 Tape end detecting system

Publications (1)

Publication Number Publication Date
JPS57147150A true JPS57147150A (en) 1982-09-10

Family

ID=12345263

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56031951A Pending JPS57147150A (en) 1981-03-06 1981-03-06 Tape end detecting system

Country Status (1)

Country Link
JP (1) JPS57147150A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2552914A1 (en) * 1983-09-29 1985-04-05 Victor Company Of Japan Device for detecting anomalies in the feed-through of the tape in a magnetic recording and/or playback apparatus
US4553182A (en) * 1982-09-28 1985-11-12 Victor Company Of Japan, Ltd. Device for detecting abnormalities in tape travel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4553182A (en) * 1982-09-28 1985-11-12 Victor Company Of Japan, Ltd. Device for detecting abnormalities in tape travel
FR2552914A1 (en) * 1983-09-29 1985-04-05 Victor Company Of Japan Device for detecting anomalies in the feed-through of the tape in a magnetic recording and/or playback apparatus

Similar Documents

Publication Publication Date Title
JPS53120295A (en) Subject discrimination device
GB1245954A (en) Device for the detection of the rotational motion of a shaft
JPS6423107A (en) Position detection apparatus and method
GB1535017A (en) Binary counting system
JPS57147150A (en) Tape end detecting system
JPS56132506A (en) Measuring device for center position of hole
JPS5412081A (en) Numerical value controller
JPS5383663A (en) Revolving speed display device of revolving body
JPS5745631A (en) Position detector
JPS531063A (en) Periodic fluctuation detector of continuous pulse
JPS5739312A (en) Pulse encoder device having alarm circuit
JPS5516251A (en) Detector of moving body
JPS6416921A (en) Rotational angle detector
JPS5767864A (en) Detector for direction and speed of rotation of rotator
JPS5724858A (en) Speed detecting device
JPS5796267A (en) Percent level detection circuit
JPS5446024A (en) Tape counter device of magnetic recorder-reproducer
JPS57143772A (en) Tape amount detecting system
JPS55147309A (en) Position detector
JPS52106260A (en) Skip detection circuit of signal reception system
JPS5729911A (en) Counting device
JPS5567959A (en) Control signal detection system
JPS6426165A (en) Speed detecting device
JPS5433079A (en) High accuracy vibration amplitude detecting method
JPS57192870A (en) Rotation detector