• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    In an apparatus for reproducing video or other information signals recorded in a track on a magnetic tape or other record medium; a magnetic head or transducer is moved along the track for reproducing the information signals recorded therein while a bi-morph leaf which supports the head receives an electrical drive signal for deflecting the head in a direction transverse to that along the track. A deflection responsive signal is generated in correspondence to the deflection of the head from a rest position, for example, in response to varying the capacitance of a capacitor formed of a fixed electrode and a movable electrode on the bi-morph leaf. A control circuit for controlling the deflection of the head includes an oscillator providing a dither oscillation signal which, on application to the bi-morph leaf, causes transverse oscillation of the head about a null position, an envelope detector detecting the envelope of the reproduced output of the head, a multiplier for synchronously demodulating the detected envelope by means of the deflection responsive signal so as to obtain a tracking error signal accurately representative of the deviation of the null position of the head from the center of the track, and an adder adding the tracking error signal to the dither oscillation signal so as to provide therefrom the electrical drive signal and by which the null position of the oscillated head is aligned with the center of the track.
    公开号:SU986302A3
    申请号:SU782625000
    申请日:1978-06-02
    公开日:1982-12-30
    发明作者:Сакамота Китоси；Вакисака Есиаки
    申请人:Сони Корпорейшн (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to the accumulation of information, namely to devices for controlling the position of a rotating magnetic head on a recording track.
    A device is known for controlling the position of a rotating magnetic head on a recording track, comprising a control unit for moving a magnetic tape mated to a guide drum in which a rotating magnetic head is mounted [1].
    The known device allows for high accuracy control the position of the rotating magnetic head on the recording track, however, it has a complex structure. ruktsiya.
    A device is also known for controlling the position of a rotating magnetic head on a recording track, comprising a sinusoidal voltage generator connected to the first of the inputs of a voltage combiner, the output of which is connected to a holder through an exciting signal amplifier, by means of which a rotary guide drum coupled to the magnetic tape is mounted a rotating magnetic head connected to the input of the playback amplifier, the output of which is connected to the output bus of the reproduced signal 10 and with an envelope detector input connected to the first of the inputs of the voltage multiplier [2].
    This device has a relatively simple design.
    The disadvantage of this device is the significant error in controlling the position of the rotating magnetic head on the recording track.
    The purpose of the invention is to reduce the accuracy of controlling the position of the rotating magnetic head on the recording track.
    The goal is achieved by the fact that in the device for controlling the position of the rotating magnetic head on the recording track, a band-stop filter and sequential deflection sensor mounted on a holder made in the form of a bimorph piezoceramic plate, a deflection signal generator and a band-pass filter connected to the second input of the multiplier are introduced voltages, and a band-pass filter is included: between the output of the voltage multiplier and the second input of the voltage adder, made with optional control input.
    In this case, the deviation sensor can be made in the form of a capacitor with a changing capacitance or in the form of a wire with a varying resistance. low.
    The drawing shows an electrical diagram of the proposed device.
    The device comprises a sinusoidal voltage generator 1 connected to the first of the inputs of the voltage adder 2, the output of which is connected through an amplifier 3 of an exciting signal to a holder 4 made in the form of a bimorph piezoelectric plate. By means of the holder 4, a rotating magnetic head 6 connected to the input of the playback amplifier 7 is mounted on a rotating guide drum 5 coupled to a magnetic tape (not shown). The output of the playback amplifier 7 is connected to the output bus 8 of the reproduced signal and to the input of the envelope detector 9 connected through a bandpass filter 10 to the first of the inputs of the voltage multiplier 11.
    The device also includes a band-pass blocking filter 12 and a deviation sensor 13 connected in series to the holder 4, a deviation signal driver 14 and a band-pass filter 15 connected to the second input of the voltage multiplier 11 in series. In this case, the deviation sensor 13 can be made in the form of a capacitor with a changing capacitance or in the form of a wire with a varying resistance, and a band-pass filter 12 is connected between the output of the voltage multiplier 11 and the second input of the voltage adder 2, made with an additional control input connected. to the input bus 1b of the triangular signal.
    The device operates as follows.
    During playback, the rotating magnetic head 6 oscillates perpendicular to the direction of the recording track with a frequency determined by the sinusoidal voltage generator 1. The envelope detector 9 receives the result of modulation of the recorded signal due to vibrations of the rotating magnetic head 6. From the envelope detector 9, a signal is transmitted to the first input of the voltage multiplier 11, carrying information about the displacement of the rotating magnetic head 6 from the recording track. At the second input of the voltage multiplier 11, a signal is received that carries information about the vibrations of the rotating magnetic head 6. From the output of the voltage adder .2, a signal is supplied to the holder 4, which along with the signal of the sinusoidal voltage generator 1 contains a signal that reduces the displacement of the rotating magnetic head 6 from the track records.
    Using the invention allows to significantly reduce the error in controlling the position of the rotating magnetic head on the recording track. .
    权利要求:
    Claims (2)
    [1]
    heads on the recording track introduced a band-stop filter and a deflection sensor connected in series, mounted on a holder made as a bimorph piezo ceramic plate, a deflection signal generator and a band-pass filter connected to the second input of a voltage multiplier, with a full block filter included 1 between the output voltage multiplier and the second input of the voltage adder made with an additional control input. In this case, the deflection sensor can be made in the form of a capacitor with a variable capacitance or in the form of a wire with a varying resistance. by niem. The drawing is an electrical diagram of the proposed device. The device comprises a sinusoidal voltage generator 1 connected to the first of the inputs of the sum of the mains 2 voltage, the output of which is connected to the holder 4 in the form of a bimorph piezoelectric plate through the amplifier 3 of the exciting signal. By means of a holder, a rotating magnet is mounted on the head 6 connected to the input of the playback amplifier 7 on a rotating guide drum 5 coupled to a magnetic tape (not shown). The output of the playback amplifier 7 is connected to the output bus 8 of the reproduced signal and to the input of the envelope detector 9 connected via a band-pass filter 10 to the first of the inputs of the voltage multiplier 11. The device also includes a band pass filter 12 and a tilt sensor 13 connected in series, a deflection signal generator AND mounted on the holder, and a band pass filter 15 connected to the second input of voltage multiplier 11. In this case, the deviation sensor 13 can be made in the form of a capacitor with a variable capacitance or in the form of a wire with a varying resistance, and a band-pass filter 12 is connected between the output of the multiplier 11 voltage and the three input of the voltage adder 2, made with an additional control input connected to the input bus 1b triangular signal. 9 24 The device operates as follows. During playback, the rotating magnetic head 6 oscillates perpendicularly to the direction of the recording track at a frequency determined by sinusoidal voltage generator 1. The input of the envelope detector 9 is the result of the modulation of the recorded signal due to the oscillations of the rotating magnetic head 6. From the envelope detector 9, the first input of the voltage multiplier 11 receives a signal carrying information about the displacement of the rotating magnetic head 6 from the recording PATH. The second input of the voltage multiplier 11 receives a signal carrying information about the oscillations of the rotating magnetic head 6. From the output of the voltage accumulator .2, a signal is sent to the holder k, which, along with the signal of the generator 1 of sinusoidal voltage, contains a signal that provides a decrease displacing the rotating magnetic head 6 from the recording track. The use of the invention makes it possible to significantly reduce the error in controlling the position of the rotating magnetic head on the recording track. Claim 1. A device for controlling the position of a rotating magnetic head on a recording track, comprising a sinusoidal voltage generator connected to the first of the inputs of a voltage adder, the output of which is connected to a holder through an excitation signal amplifier, by means of which on a rotating guide drum coupled to a magnetic tape, A rotating magnetic head is installed, connected to the input of the playback amplifier, the output of which is connected to the output bus of the reproduced signal and to the input of detectors The aperture envelope connected to the first of the inputs of the voltage multiplier, aphid. It is found that, in order to reduce the control error, a band-rejection filter and a deflection sensor connected in series, mounted on a holder made in the form of a bimorph piezoceramic plate, are inserted in it a deviation signal and a band-pass filter connected to the second input of the multiplier on apr, and the band-stop filter is connected between the output of the voltage multiplier and the second input of the adder straight zheny performed with an additional control input.
    [2]
    2. The device according to claim 1, about tl and that the sensor
    deviations are made in the form of a capacitor with variable capacitance.
    3- The device according to claim 1, characterized in that the deviation sensor is made in the form of a wire with varying resistance.
    Sources of information taken into account in the examination
    1. Lazarev Century. And. And others. Magnetic recording television images. M.-Y., State Energy Publishing House, 1963, p. 72-76.
    2. The US patent NT 3126535, CP. 360-77, 196 (prototype).
    类似技术:
    公开号 | 公开日 | 专利标题
    SU986302A3|1982-12-30|Apparatus for controlling the position of rotary magnetic head along recording track
    US4481550A|1984-11-06|Method and apparatus for following a recorded data track with a read head
    US4148082A|1979-04-03|Tracking control apparatus
    US4151570A|1979-04-24|Automatic scan tracking using a magnetic head supported by a piezoelectric bender element
    US3711641A|1973-01-16|Velocity adjusting system
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    CA1104714A|1981-07-07|Automatic head tracking system
    SU1003775A3|1983-03-07|Device for inclined-line recording and playback on magnetic tape
    US4229773A|1980-10-21|Video signal recording system with automatic head positioning
    US4143405A|1979-03-06|Automatic head scan tracking system
    CA1111959A|1981-11-03|Tracking-error correcting system for use with record medium scanning apparatus
    US3985952A|1976-10-12|Elasto-optic device for spot wobble in a video disc player
    EP0039915B1|1984-02-15|Head tracking control system
    US4296443A|1981-10-20|Magnetic head tracking control system
    US4152727A|1979-05-01|Reproducing transducer capable of tracking control
    CA1252205A|1989-04-04|Method and apparatus for producing special motioneffects in video recording and reproducing apparatus
    US4322748A|1982-03-30|High-speed reproducing system in apparatus for reproducing information signals recorded on a rotary recording medium
    US4251838A|1981-02-17|Auto-tracking control system for use in apparatus for reproducing a video signal recorded in successive parallel tracks on a recording medium
    US4167762A|1979-09-11|Open loop servo-system for accurate tracking in a video signal reproducing apparatus
    US4470079A|1984-09-04|Tracking control system in a magnetic recording and reproducing apparatus
    US5157563A|1992-10-20|Magnetic recording and reproducing apparatus using an electromagnetic actuator for automatic tracking
    JP2595752B2|1997-04-02|Magnetic recording / reproducing device
    US3983318A|1976-09-28|Velocity correction system with damping means
    KR910007761B1|1991-09-30|Editing apparatus for vcr
    CA1039401A|1978-09-26|Velocity correction transducer
    同族专利:
    公开号 | 公开日
    JPS54307U|1979-01-05|
    US4163994A|1979-08-07|
    CA1106494A|1981-08-04|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3126535A|1961-12-27|1964-03-24|Transducer positioning system |
    DE1275580B|1964-06-25|1968-08-22|Grundig Max|Method and device for reducing the deviation of the video head from the recording track when scanning video magnetic tape recordings|
    US3526726A|1967-09-27|1970-09-01|Ampex|Piezoelectric transducer assembly for positioning a magnetic record/reproduce head|
    US3706861A|1969-09-18|1972-12-19|Rca Corp|Apparatus for mounting and spacing a signal transducer with respect to a recording medium|
    SU387423A1|1971-06-07|1973-06-21|DEVICE FOR COMPENSATION OF MAGNETIC TAPE SWIPS|
    US3787616A|1972-06-05|1974-01-22|Newell Ind|Time base error correction system and method|
    SU421041A1|1972-06-09|1974-03-25|
    JPS5633772B2|1972-12-20|1981-08-06|
    NL7409513A|1974-07-15|1976-01-19|Philips Nv|Servo system for controlling position of magnetic reading head - has selection signals written into data tracks with simultaneous reading of adjacent tracks|
    JPS598891B2|1974-11-26|1984-02-28|Sony Corp|
    US4093885A|1976-03-19|1978-06-06|Ampex Corporation|Transducer assembly vibration sensor|
    US4080636A|1976-03-19|1978-03-21|Ampex Corporation|System for damping vibrations in a deflectable transducer|
    US4106065A|1976-03-19|1978-08-08|Ampex Corporation|Drive circuitry for controlling movable video head|
    US4099211A|1976-09-13|1978-07-04|Ampex Corporation|Positionable transducing mounting structure and driving system therefor|
    GB1560023A|1976-10-05|1980-01-30|Sony Corp|Automatic magnetic-head scan tracking arrangements|JPS6213726B2|1978-02-23|1987-03-28|Sony Corp|
    US4318142A|1978-03-23|1982-03-02|Ampex Corporation|Automatically compensated movable head servo circuit and method|
    JPS6235165B2|1979-01-31|1987-07-31|Matsushita Electric Ind Co Ltd|
    US4285017A|1979-02-05|1981-08-18|International Business Machines Corporation|Stripe following in a helical scan device|
    US4290088A|1979-06-04|1981-09-15|Texas Instruments Incorporated|System and method for erasing information from a flexible information storage media|
    US4280023A|1979-07-09|1981-07-21|Rca Corporation|Stylus position sensing apparatus for video disc player|
    US4382292A|1979-07-09|1983-05-03|Rca Corporation|Video disc player having stylus position sensing apparatus|
    US4277796A|1979-10-22|1981-07-07|Rca Corporation|Slow down color processor for video disc mastering using a special mode VTR|
    US4320490A|1979-12-17|1982-03-16|Rca Corporation|Video disc cartridge having a self retaining electrode|
    US4313189A|1979-12-20|1982-01-26|Rca Corporation|Stylus position sensor for video disc player apparatus|
    AU6536480A|1979-12-20|1981-06-25|Rca Corp.|Video disc stylus position sensor system|
    JPS6139509Y2|1979-12-28|1986-11-12|
    JPS633375B2|1980-01-19|1988-01-23|Matsushita Electric Ind Co Ltd|
    JPS6326456B2|1980-05-08|1988-05-30|Sony Corp|
    JPH0126231B2|1981-02-14|1989-05-23|Sony Corp|
    JPS644395B2|1981-02-24|1989-01-25|Sony Corp|
    EP0304633B1|1982-09-17|1993-01-20|Ampex Corporation|An improved automatic head position tracking servo for a rotary head magnetic tape recording and reproducing apparatus|
    JPS60158781A|1984-01-27|1985-08-20|Sony Corp|Video tape recorder|
    US4611249A|1985-05-03|1986-09-09|Eastman Kodak Company|Flux sensitive tracking|
    US4652945A|1985-05-03|1987-03-24|Eastman Kodak Company|Flux sensitive tracking|
    US4670800A|1985-05-03|1987-06-02|Eastman Kodak Company|Edge guided magnetic tape tracking|
    US4818948A|1986-08-05|1989-04-04|Pratt & Whitney Canada Inc.|Capacitive bridge-type probe for measuring blade tip clearance|
    FR2608825B1|1986-12-19|1994-12-30|Enertec|DEVICE FOR DETECTING THE POSITION OF A MAGNETIC HEAD|
    US4795965A|1987-10-14|1989-01-03|Pratt & Whitney Canada Inc.|Capacitance to voltage conversion circuit including a capacitive bridge and a capacitive offset|
    EP0372481B1|1988-12-06|1995-08-09|Mitsubishi Denki Kabushiki Kaisha|Magnetic recording and reproducing apparatus|
    JPH0567315B1|1988-12-19|1993-09-24|Sankyo Co|
    US6438360B1|1999-07-22|2002-08-20|Motorola, Inc.|Amplifier system with load control to produce an amplitude envelope|
    FI20041344A|2004-10-15|2006-04-16|Valtion Teknillinen|Sensor and method for measuring a quantity applied to a component|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP1977072050U|JPS54307U|1977-06-04|1977-06-04|
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