公开(公告)号：US06683922B1

公开(公告)日：2004-01-27

申请号：US09483777

申请日：2000-01-18

申请人： Atsushi Hayami ,  Makoto Itonaga

发明人： Atsushi Hayami ,  Makoto Itonaga

IPC分类号： H04L2706

CPC分类号： H03M13/6343 ,  H03M13/3961 ,  H03M13/4107

摘要： In a data decoding apparatus that performs decoding of recorded data played back from a recording medium by Viterbi decoding according to a decoding trellis based on a recording signal characteristic, a pathmetric calculation circuit has run length counters (20) and (25) for detecting the run length of recorded data, a target value control circuit (1) for varying the target value used for metric calculation of Viterbi decoding based on run length information, and a monitoring means, provided in the target value control circuit (1), for protecting against faulty operation caused by using a count value that should not be used as an information source.

摘要翻译： 在通过基于记录信号特性的解码格架通过维特比解码从记录介质重放的记录数据的解码的数据解码装置中，路径计算电路具有用于检测记录信号的行程长度计数器（20）和（25） 记录数据的行程长度，用于根据游程长度信息改变用于维特比解码度量计算的目标值的目标值控制电路（1）和设置在目标值控制电路（1）中的监视装置，用于保护 防止使用不应用作信息源的计数值引起的错误操作。

公开(公告)号：US08611411B2

公开(公告)日：2013-12-17

申请号：US13256608

申请日：2010-03-18

申请人： Atsushi Hayami ,  Makoto Itonaga

发明人： Atsushi Hayami ,  Makoto Itonaga

IPC分类号： H03H7/30

CPC分类号： G11B20/10009 ,  G11B20/10046 ,  G11B20/1012 ,  G11B20/10222 ,  G11B20/10296 ,  G11B20/10379 ,  G11B20/10462 ,  G11B2220/2537

摘要： A linear equalizer unit sequentially subjects a signal to be processed to linear equalization. A temporary decision unit sequentially subjects a signal subjected to linear equalization by the linear equalizer unit to temporary decision. A nonlinear equalizer unit derives a plurality of coefficients using a signal subjected to temporary decision as a teacher signal and sequentially subject a signal subjected to linear equalization by the linear equalizer unit to nonlinear equalization based on the plurality of coefficients.

摘要翻译： 线性均衡器单元将待处理的信号顺序地进行线性均衡。 临时判断单元将线性均衡器进行线性均衡的信号顺序地进行临时决定。 非线性均衡器单元使用经过临时判定的信号作为教师信号来导出多个系数，并且基于多个系数将由线性均衡器单元进行线性均衡的信号顺序地进行非线性均衡。

公开(公告)号：US20120002712A1

公开(公告)日：2012-01-05

申请号：US13256608

申请日：2010-03-18

申请人： Atsushi Hayami ,  Makoto Itonaga

发明人： Atsushi Hayami ,  Makoto Itonaga

IPC分类号： H04L27/01

CPC分类号： G11B20/10009 ,  G11B20/10046 ,  G11B20/1012 ,  G11B20/10222 ,  G11B20/10296 ,  G11B20/10379 ,  G11B20/10462 ,  G11B2220/2537

摘要： A linear equalizer unit sequentially subjects a signal to be processed to linear equalization. A temporary decision unit sequentially subjects a signal subjected to linear equalization by the linear equalizer unit to temporary decision. A nonlinear equalizer unit derives a plurality of coefficients using a signal subjected to temporary decision as a teacher signal and sequentially subject a signal subjected to linear equalization by the linear equalizer unit to nonlinear equalization based on the plurality of coefficients.

摘要翻译： 线性均衡器单元将待处理的信号顺序地进行线性均衡。 临时判断单元将线性均衡器进行线性均衡的信号顺序地进行临时决定。 非线性均衡器单元使用经过临时判定的信号作为教师信号来导出多个系数，并且基于多个系数将由线性均衡器单元进行线性均衡的信号顺序地进行非线性均衡。

公开(公告)号：US07061839B2

公开(公告)日：2006-06-13

申请号：US09917700

申请日：2001-07-31

申请人： Makoto Itonaga ,  Atsushi Hayami ,  Junichiro Tonami

发明人： Makoto Itonaga ,  Atsushi Hayami ,  Junichiro Tonami

IPC分类号： G11B7/00

CPC分类号： G11B7/0053 ,  G11B7/007 ,  G11B7/24085 ,  G11B20/10009

摘要： An optical information recording medium (1) is composed of a pit recording area (2), wherein various control information is recorded by a prepit, and a user recording area (3) having a guide groove formed in a groove format, and a phase depth for the prepit and the groove are approximately the same wherein the phase depth is less than or equal to λ/10, wherein λ is a wavelength for reproducing light source. A recording/reproducing apparatus (4) for the optical information recording medium (1) includes decoding means (12) for decoding information by detecting a tangential push-pull reproduced signal from the prepit recording area (2) and detecting an aggregated signal from the user recording area (3).

摘要翻译： 光信息记录介质（1）由凹坑记录区域（2）组成，其中通过预凹坑记录各种控制信息，以及具有以沟槽形式形成的引导槽的用户记录区域（3）和相位 预制凹坑和凹槽的深度大致相同，其中相位深度小于或等于λ/ 10，其中λ是用于再现光源的波长。 一种用于光学信息记录介质（1）的记录/再现装置（4）包括：解码装置（12），用于通过检测来自预凹坑记录区域（2）的切向推挽再现信号来解码信息，并且检测来自 用户记录区（3）。

公开(公告)号：US08419575B2

公开(公告)日：2013-04-16

申请号：US13081124

申请日：2011-04-06

申请人： Osamu Yoshida ,  Yuji Kurematsu ,  Atsushi Hayami

发明人： Osamu Yoshida ,  Yuji Kurematsu ,  Atsushi Hayami

IPC分类号： F16H7/08

CPC分类号： F16H7/0848 ,  F16H2007/0806 ,  F16H2007/0812 ,  F16H2007/0853 ,  F16H2007/0859

摘要： A tensioner for a chain or similar power transmission medium comprises a spring-biased plunger having annular rack teeth with gradually sloping forward surfaces and steeper rearward surfaces. The teeth are engaged by radially movable balls received in inclined grooves in an axially movable annular ball seat disposed in an annular groove formed in the wall of a plunger-accommodating hole in a tensioner housing. The bottoms of the inclined grooves face a steep rearward surface of a rack tooth, and the annular ball seat is axially movable in the annular groove and biased in the plunger protruding direction by a spring that exerts a biasing force greater than the biasing force exerted on the plunger. The balls and the movable annular ball seat block retraction of the plunger on engine start-up, but permit retraction when excessive force is imparted to the plunger while the plunger is in a protruding condition.

摘要翻译： 用于链式或类似动力传递介质的张紧器包括具有环形齿条齿的弹簧偏置柱塞，其具有逐渐倾斜的前表面和更陡的后表面。 这些齿通过容纳在设置在形成在张紧器壳体中的柱塞容纳孔的壁中的环形槽中的可轴向移动的环形球座中的倾斜槽中接收。 倾斜槽的底部面向齿条齿的陡峭的后表面，并且环形球座可在环形槽中轴向移动，并通过弹簧施加偏压力，该弹簧施加在柱塞突出方向上，该弹簧施加大于施加在 柱塞。 球和可动环形球座座在发动机启动时柱塞缩回，但是当柱塞处于突出状态时，当柱塞施加过大的力时允许回缩。

公开(公告)号：US20120295747A1

公开(公告)日：2012-11-22

申请号：US13468073

申请日：2012-05-10

申请人： Yuichiri Ishikawa ,  Atsushi Hayami ,  Tadashi Shintani

发明人： Yuichiri Ishikawa ,  Atsushi Hayami ,  Tadashi Shintani

IPC分类号： F16H7/18

CPC分类号： F16H7/18 ,  F16H2007/0872

摘要： An elongated stationary guide for a traveling transmission chain in an engine such as a timing chain has a narrow reinforcing groove formed along the longitudinal direction of a metal base plate of the guide by surface-pressing, whereby the base plate exhibits plastic deformation. The narrow reinforcing groove extends toward the ends of the base plate past the locations at which the base plate is mounted on an engine block by mounting bolts.

摘要翻译： 用于诸如正时链条的发动机中的行进传动链的细长固定引导件具有通过表面压制沿着引导件的金属基板的纵向方向形成的窄的加强槽，由此基板呈现塑性变形。 狭窄的加强槽通过安装螺栓朝基板的端部延伸穿过基板安装在发动机缸体上的位置。

公开(公告)号：US20110021298A1

公开(公告)日：2011-01-27

申请号：US12829706

申请日：2010-07-02

申请人： Yuji Kurematsu ,  Atsushi Hayami

发明人： Yuji Kurematsu ,  Atsushi Hayami

IPC分类号： F16H7/08

CPC分类号： F16H7/0836 ,  F16H7/0848 ,  F16H2007/0812 ,  F16H2007/0853 ,  F16H2007/0855 ,  F16H2007/0859 ,  F16H2007/0891

摘要： In a chain tensioner, an expansible ring is disposed in an internal groove formed in the inner wall of a plunger-accommodating hole near an open end thereof. The ring cooperates with grooves formed on the plunger to exert a ratchet action. The relationship between the angles of the surfaces of the internal groove and the grooves on the plunger allows the plunger to protrude, restricts retraction of the plunger on start-up of a chain transmission, but allows retraction when chain tension becomes excessive. In one embodiment, in which the ring is a C-ring, the tensioner housing can be formed with external threads for mounting in a threaded hole on a timing chain cover or other engine part. In other embodiments, the ring can have externally protruding levers for manipulation of the ring.

摘要翻译： 在链条张紧器中，可膨胀的环设置在形成在其开口端附近的柱塞容纳孔的内壁中的内槽中。 环与形成在柱塞上的凹槽配合以施加棘轮动作。 内槽的表面和柱塞上的槽之间的关系允许柱塞突出，限制链条传动装置启动时柱塞的缩回，但当链张力过大时允许缩回。 在其中环是C形环的一个实施例中，张紧器壳体可以形成有外螺纹，用于安装在正时链盖或其它发动机部件上的螺纹孔中。 在其他实施例中，环可以具有用于操纵环的外部突出的杠杆。

公开(公告)号：US20090036242A1

公开(公告)日：2009-02-05

申请号：US12128175

申请日：2008-05-28

申请人： Atsushi Hayami ,  Tomoya Iwata

发明人： Atsushi Hayami ,  Tomoya Iwata

IPC分类号： F16H7/08

CPC分类号： F16H7/18 ,  F16H2007/0872

摘要： A chain guide is composed of a resin shoe engageable with an aluminum base frame. The shoe has a hook formed at a chain entry end for engagement with a chain entry end of the base frame, and a C-shaped hook at the chain exit end engageable with a side edge of the base frame. The shoe is engaged with the base by first engaging the C-shaped hook with the side edge of the base frame, then flexing the chain entry end of the shoe until the hook at the chain entry end can receive the chain entry end of the base. The shoe is moved a short distance toward the chain exit end of the base until a projection formed on a back surface of the shoe near the chain entry end snaps into a depression formed on a front surface of the base frame, locking the shoe and base together.

摘要翻译： 链条引导件由可与铝基框架接合的树脂靴构成。 鞋具有形成在链条入口端处的钩子，用于与基部框架的链条进入端接合，并且在链条出口端处的C形钩可与基部框架的侧边缘接合。 通过首先使C形钩与基座的侧边缘接合，然后使鞋的链条进入端弯曲，直到链条进入端的钩子可以接收底座的链条进入端，鞋与底座接合 。 鞋子朝向基座的链条出口端移动很短的距离，直到形成在靠近链条进入端的鞋的后表面上的突起卡入形成在基座框架的前表面上的凹陷中，锁定鞋和底座 一起。

公开(公告)号：US07468012B2

公开(公告)日：2008-12-23

申请号：US11319352

申请日：2005-12-28

申请人： Atsushi Hayami ,  Toshifumi Sato

发明人： Atsushi Hayami ,  Toshifumi Sato

IPC分类号： F16H7/08

CPC分类号： F16H7/0836 ,  F16H7/0848 ,  F16H2007/0806 ,  F16H2007/0853 ,  F16H2007/0859

摘要： In a ratchet tensioner, a pawl, pivoted on a shaft in the tensioner housing, engages teeth on a plunger protruding from the housing to allow protruding movement of the plunger, while limiting retracting movement to a backlash distance. The pawl is biased into contact with the teeth on the plunger by a spring disposed in a hole in the housing and acting, through a piston slidable in the same hole, against a convexly curved surface of the pawl. The piston has a reduced portion in engagement with the pawl, which allows the pawl to be miniaturized without excessively reducing the radial dimensions of the portion of the pawl surrounding the pivot shaft.

摘要翻译： 在棘轮张紧器中，枢转在张紧器壳体中的轴上的棘爪接合从壳体突出的柱塞上的齿，以允许柱塞突出移动，同时将缩回运动限制到间隙距离。 棘爪通过设置在壳体中的孔中的弹簧偏置成与柱塞上的齿接触，并且通过可在同一孔中滑动的活塞抵抗棘爪的凸形弯曲表面。 活塞具有与棘爪接合的减小部分，其允许棘爪小型化，而不会过度地减小围绕枢转轴的棘爪的部分的径向尺寸。

公开(公告)号：US07016286B2

公开(公告)日：2006-03-21

申请号：US10178619

申请日：2002-06-25

申请人： Atsushi Hayami ,  Tsuyoshi Oki ,  Toshio Kuroiwa

发明人： Atsushi Hayami ,  Tsuyoshi Oki ,  Toshio Kuroiwa

IPC分类号： G11B5/09

CPC分类号： H03M5/145 ,  G11B20/1426

摘要： First and second synchronous words having respective numbers of times of inversion different from each other in NRZI conversion are generated in a synchronous word generation portion, and first and second code word series data are generated by arranging code word data generated making reference to a run-length coding table after these two synchronous words. With respect to the first and second code word series data, DSV calculation results stored in two DSV calculation peak value memories corresponding to these data are compared with each other by a peak value comparison portion. Based on a comparison result, the code word series data having a smaller direct-current component generated in NRZI conversion is selected.