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    Head wear detector
    51.
    发明专利
    Head wear detector 失效
    头部磨损检测器

    公开(公告)号：JPS5954026A

    公开(公告)日：1984-03-28

    申请号：JP16433482

    申请日：1982-09-21

    Applicant: Sony Corp

    Inventor： SONODA MASAKAZU ,  IMAMURA MASASHI

    IPC: G11B5/455 ,  G11B33/10

    CPC classification number: G11B33/10

    Abstract: PURPOSE:To detect accurately the state of wear of a magnetic head, by detecting the wear progressing state of the head in the form a change of impedance of a magnetic head circuit. CONSTITUTION:The impedance Z of a magnetic head circuit 1 increases as the depth length of a magnetic head 5 is reduced due to the wear of the head. As a result, the current and voltage supplied to the primary side of a rotary transformer 4 are varied, and an impedance detecting circuit VIMP goes up in accordance with the change of the depth length of the head 5. Therefore the input voltage V2 of a voltage comparator 8 rise higher than the reference voltage V1, and accordingly the light emitting part of a wear display device 10 extends toward scales t2, t3.... Then it is understood that the wear of the head 5 progresses up to the end of the head lifetime when the tip of the light emitting part of the device 10 reaches red scales t3 and t4. In such a way, the weared state of a magnetic head can be accurately detected.

    Abstract translation: 目的：通过以磁头电路的阻抗变化的形式检测磁头的磨损进行状态，准确地检测磁头的磨损状态。 构成：磁头电路1的阻抗Z随着磁头5的深度长度的减小而增加。 结果，提供给旋转变压器4的初级侧的电流和电压是变化的，并且阻抗检测电路VIMP根据头5的深度长度的变化而上升。因此，输入电压V2 电压比较器8比参考电压V1上升，因此磨损显示装置10的发光部分朝着刻度t2，t3延伸。然后可以理解，头5的磨损进行到 当设备10的发光部分的尖端达到红色刻度t3和t4时的头寿命。 以这种方式，可以精确地检测磁头的磨损状态。

    TAPE TRAVELLING CONTROL CIRCUIT
    53.
    发明专利
    TAPE TRAVELLING CONTROL CIRCUIT 失效

    公开(公告)号：JPS5712438A

    公开(公告)日：1982-01-22

    申请号：JP8485180

    申请日：1980-06-23

    Applicant: SONY CORP

    Inventor： KAIMAI HIROYUKI ,  SONODA MASAKAZU ,  KOMATSU MASAAKI ,  SAKAI ATSUO ,  KAMAI TOSHIMITSU

    IPC: G11B15/18 ,  H04N5/783

    Abstract: PURPOSE:To prevent a fluctuation of the tape transport extent caused by a change of speed of slow motion reproduction, by controlling the level or width of the intermittent transport driving pulse in accordance with the intermittent period of a tape. CONSTITUTION:The slow motion reproducing speed with which the intermittent normal transport due to a capstan equivalent to a pitch of the control signal corresponding to a frame of pause of a magnetic tape within a prescribed frame period number is repeated varies in accordance with the number of selection frame periods in a stop mode. In case the speed of reproduction is varied, a slow-speed monostable multivibrator 6 is controlled via a transistor 20, a capacitor 18 and others with control of a variable resistance 21 of a correcting circuit 17. Then the width and others are controlled for the driving pulse delivered from a forward-turn monostable multivibrator 7, and thus a correction is given to the fluctuation of the starting state due to the residuel energy according to the slow reproduction speed of the intermittent drive of a capstan produced by a step motor 1 or the like. In the same way, a fluctuation can be prevented for the tape intermittent transport extent caused by a change of speed of slow motion reproduction also at the brake side.

    REPRODUCING DEVICE OF VIDEO SIGNAL
    54.
    发明专利
    REPRODUCING DEVICE OF VIDEO SIGNAL 失效

    公开(公告)号：JPS572177A

    公开(公告)日：1982-01-07

    申请号：JP7529980

    申请日：1980-06-04

    Applicant: SONY CORP

    Inventor： KAIMAI HIROYUKI ,  SONODA MASAKAZU ,  KOMATSU MASAAKI ,  SAKAI ATSUO ,  KAMAI TOSHIMITSU

    IPC: G11B5/52 ,  G11B5/53 ,  H04N5/783 ,  H04N5/93

    Abstract: PURPOSE:To simplify greatly the control of a compensation circuit, by performing a still reproduction with use of a pair of rotary heads which is provided at a position away from an angulr distance of 180 deg. by a specific angular distance. CONSTITUTION:An azimuth slant recording is carried out to reproduce a recording medium containing a recording pattern in which a shift of 0.75H (H: distance equivalent to a horizontal period on track) is caused. In this case, rotary heads 1A and 2A distributed with a shift of angle of 0.25H' (H': angle equivalent to a horizontal period) to an angular distance of 180 deg. are used. Thus a jumping compensation is possible in a still reproduction mode of a record pattern to which no H arrangement is given and by producing alternately a state with an intervention of a delay circuit of 0.5Th (Th: a horizontal period) and a state with no intervention at a compensation circuit. In the case of a record pattern having no H arrangement, a state with an intervention of a delay circuit of 0.25Th and a state with no intervention are produced alternately. In such way, the control of a compensation circuit is greatly simplified.

    DISK PLAYER
    56.
    发明专利
    DISK PLAYER 失效

    公开(公告)号：JPS63179474A

    公开(公告)日：1988-07-23

    申请号：JP1037387

    申请日：1987-01-20

    Applicant: SONY CORP

    Inventor： SONODA MASAKAZU ,  MARUTA KEIJI ,  YAMADA AKIHIRO

    IPC: G11B21/08 ,  G11B27/10

    Abstract: PURPOSE:To attain reproduction from a last position without using a nonvolatile memory by moving a pickup while reading present position information and bringing the reproducing state when a phase difference between the present position information and the last position information is a prescribed value. CONSTITUTION:When a power supply is interrupted, a pickup 1 is supported to a position where power supply is interrupted, that is, the last position by a mechanical means such as a rack 4 and a pinion 5, and the last position is maintained till the power supply is applied again. In application of the power supply again, the position of the pickup 1 at application of the power supply, that is, the information of the last position is stored, and when the difference of position between the present position information and the stored last position information of the pickup 1 comes to a prescribed value, the reproduced state is attained. Thus, the reproduction from the last position is attained without using a nonvolatile memory.

    Magnetic recorder for information signal
    59.
    发明专利
    Magnetic recorder for information signal 失效
    信息信号磁记录仪

    公开(公告)号：JPS61104451A

    公开(公告)日：1986-05-22

    申请号：JP22475184

    申请日：1984-10-25

    Applicant: Sony Corp

    Inventor： KOBAYASHI YOICHI ,  KUMAGAI TAKAO ,  SONODA MASAKAZU

    IPC: G11B15/087 ,  G11B15/665

    Abstract: PURPOSE: To improve the joint shooting accuracy and also to shorten the composite photographing time by setting a tape driving speed at 90% normal level, for example, in a composite photographing mode and then performing the video recording at a normal speed when the coincidence of phase is obtained with a control pulse which is recorded by the composite photographing.
    CONSTITUTION: When the drive of a tape 1 is started at a speed of approximately 90% normal level at a time point t
    1 , a control pulse CTL is supplied to a comparator 45 from a head 16 via a switch circuit 43 and an amplifier 44. Then the phase of said pulse CTL is compared with that of a control pulse CTL given from a pulse forming circuit 30. The comparison output COMP is supplied to a system control circuit 40 where the difference of phase is checked between both pulses CTL by the output COMP. Then the drive voltage MDRV of positive polarity is supplied to a motor 49 at a time point t
    2 when said difference of phase is reduced satisfactorily. Thus a pinch roller is pressed to a capstan. Hereafter the tape 1 is drive at a normal speed.
    COPYRIGHT: (C)1986,JPO&Japio

    Abstract translation: 目的：为了提高联合拍摄精度，并且通过将磁带驱动速度设定在90％正常水平，例如在复合拍摄模式中，并且然后当正常速度下的视频记录以 通过由复合摄影记录的控制脉冲获得相位。 构成：当磁带1的驱动在时间点t1以大约90％正常电平的速度启动时，控制脉冲CTL经由开关电路43和放大器44从头16提供给比较器45。 然后将所述脉冲CTL的相位与从脉冲形成电路30给出的控制脉冲CTL的相位进行比较。比较输出COMP被提供给系统控制电路40，在两个脉冲CTL之间通过输出检查相位差 COMP。 然后，当所述相位差令人满意地降低时，在时间点t2将正极性的驱动电压MDRV提供给电动机49。 因此，压紧辊被压到绞盘上。 之后，磁带1以正常速度驱动。

    Clock detector for rotary head type recorder
    60.
    发明专利
    Clock detector for rotary head type recorder 失效
    旋转头类型记录仪的时钟检测器

    公开(公告)号：JPS59188822A

    公开(公告)日：1984-10-26

    申请号：JP6270483

    申请日：1983-04-08

    Applicant: Sony Corp

    Inventor： SONODA MASAKAZU ,  NAKAYAMA KOUICHI ,  SADO TOSHIYUKI

    IPC: G11B5/027 ,  G11B5/455 ,  G11B15/04 ,  G11B15/14 ,  G11B27/36

    CPC classification number: G11B15/14 ,  G11B5/455 ,  G11B15/04 ,  G11B27/36

    Abstract: PURPOSE: To eliminate the wrong detection with the joint recording by switching a head at the middle of each track in a reproduction mode preceding a record mode and at the same time detecting the state of a reproduction output synchronously with the head switching to detect the clock generation.
    CONSTITUTION: In a reproduction mode preceding a record mode next to a joint record mode, switch circuits 31 and 32 are switched to the side of a terminal PB by the signal MRP sent from a timing signal generating circuit 30. Then the reproduction outputs given from rotary heads 25A and 25B are supplied to a head switch circuit 41. The circuit 41 is switched by the switch signal PAB given from the circuit 30. The signal PAB obtained in a reproduction mode has a double frequency as much as the switch signal obtained in a record mode. The outputs of rotary heads 25A and 25B are switched every half revolution. This switching time point is set at about the middle of the scan period of heads 25A and 25B respectively. That is, the reproduction outputs of heads 25A and 25B are obtained from the circuit 41 in the first half and the second half of each scan period respectively.
    COPYRIGHT: (C)1984,JPO&Japio

    Abstract translation: 目的：通过在记录模式之前的再现模式中切换每个轨道的中间的头部，同时检测与头切换同步的再现输出状态以检测时钟来消除联合记录的错误检测 代。 构成：在联合记录模式旁边的记录模式之前的再现模式中，通过从定时信号发生电路30发送的信号MRP将开关电路31和32切换到端子PB的侧面。然后，从 旋转头25A和25B被提供给磁头开关电路41.电路41通过从电路30给出的开关信号PAB来切换。以再现模式获得的信号PAB具有与在 记录模式。 旋转头25A和25B的输出每半圈切换一次。 该切换时间点分别设定在头部25A和25B的扫描周期的中间。 也就是说，分别在每个扫描周期的前半部分和后半部分中从电路41获得磁头25A和25B的再现输出。

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