公开(公告)号：US06803965B1

公开(公告)日：2004-10-12

申请号：US09477459

申请日：2000-01-04

申请人： Hirotaka Takegoshi ,  Nobuo Yamazaki

发明人： Hirotaka Takegoshi ,  Nobuo Yamazaki

IPC分类号： H04N504

CPC分类号： H04N17/00

摘要： A method of measuring horizontal frequency, which comprises the steps of resetting an 8-bit counter, which counts horizontal synchronous pulses separated from a video signal, at a time point corresponding to an edge of a vertical synchronous signal separated from the video signal, causing a data latch portion, which is operative to latch count data obtained from a 16-bit counter operative to count clock pulses having a predetermined frequency, to latch the count data obtained from the 16-bit counter at a time point corresponding to an edge of a bit output signal obtained from the seventh bit position of the 8-bit counter, detecting a period which corresponds to 128 times a horizontal period of the video signal based on a difference between counted values represented respectively by a couple of count data latched successively by the data latch portion, and measuring horizontal frequency of the video signal by calculating the horizontal frequency on the strength of the period corresponding to 128 times the horizontal period.

摘要翻译： 一种测量水平频率的方法，包括以下步骤：在对应于与视频信号分离的垂直同步信号的边缘的时间点上复位计数从视频信号分离的水平同步脉冲的8位计数器，引起 数据锁存部分，用于锁存从16位计数器获得的计数数据，该计数数据可操作用于计数具有预定频率的时钟脉冲，以在与16位计数器的边缘对应的时间点锁存从16位计数器获得的计数数据 从8位计数器的第7位位置获得的位输出信号，根据由相继锁存的数个计数数据表示的计数值之间的差值，检测对应于视频信号的水平周期的128倍的周期 数据锁存部分，并且通过根据周期的强度计算水平频率来测量视频信号的水平频率 ng到水平周期的128倍。

公开(公告)号：US06791803B2

公开(公告)日：2004-09-14

申请号：US10218569

申请日：2002-08-15

申请人： Shinji Saito ,  Nobuo Yamazaki ,  Hitoshi Noguchi

发明人： Shinji Saito ,  Nobuo Yamazaki ,  Hitoshi Noguchi

IPC分类号： G11B502

CPC分类号： G11B5/714 ,  G11B5/70 ,  G11B5/70678 ,  Y10T428/257

摘要： Provided are a method of magnetic recording and reproducing capable of permitting high density recording on magnetic recording media even under the condition of high data transfer rates and yielding adequate recording and reproduction characteristics when an MR head is used in reproduction, and a magnetic recording medium capable of being used in this magnetic recording and reproducing method. The magnetic recording and reproducing method is a method for reproducing a signal magnetically recorded on a magnetic recording medium with a magnetoresistive (MR) head. The magnetic recording medium comprises a substantially nonmagnetic lower layer and a magnetic layer comprising a hexagonal ferrite ferromagnetic powder and a binder in this order on at least one side of a nonmagnetic support, in which said hexagonal ferrite ferromagnetic powder has a mean plate diameter ranging from 15 to 40 nm and a mean plate thickness ranging from 4 to 15 nm, and said magnetic layer has a coercive force Hc ranging from 143.3 to 318.4 kA/m, and said signal magnetically recorded has a maximum recording frequency ranging from 10 to 80 MHz.

摘要翻译： 提供了一种磁记录和再现方法，即使在高数据传输速率的条件下也能够在磁记录介质上进行高密度记录，并且当在再现中使用MR磁头时产生足够的记录和再现特性，以及能够使用磁记录介质 被用于这种磁记录和再现方法中。 磁记录和再现方法是一种利用磁阻（MR）磁头再现磁记录在磁记录介质上的信号的方法。 磁记录介质在非磁性载体的至少一侧上依次包括基本上非磁性的下层和包含六方铁素体铁磁粉末和粘合剂的磁性层，其中所述六方晶系铁氧体铁磁粉末的平均板直径范围为 15至40nm，平均板厚度范围为4至15nm，所述磁性层的矫顽力Hc为143.3至318.4kA / m，磁性记录的所述信号具有10至80MHz的最大记录频率 。

公开(公告)号：US06703101B2

公开(公告)日：2004-03-09

申请号：US10183522

申请日：2002-06-28

申请人： Nobuo Yamazaki ,  Shinji Saito

发明人： Nobuo Yamazaki ,  Shinji Saito

IPC分类号： G11B582

CPC分类号： G11B5/70678 ,  Y10T428/24355

摘要： A magnetic recording medium for reproduction of MR head comprising a support having thereon a substantially non-magnetic low layer and a magnetic layer comprising ferromagnetic hexagonal system ferrite particles dispersed in a binder, in this order, wherein a power spectrum of density at a spatial frequency of 100/mm having frequency-analyzed a surface roughness of the magnetic layer is 10,000 nm3 or less, the power spectrum of density at a spatial frequency of 500/mm is 50 to 500 nm3 and an average tabular diameter of the ferromagnetic hexagonal system ferrite particles is 15 to 35 nm.

摘要翻译： 一种用于再现MR磁头的磁记录介质，包括其上具有基本上非磁性的低层的载体和包含分散在粘合剂中的铁磁六方晶系铁氧体颗粒的磁性层，其中空间频率的密度的功率谱 经过频率分析的磁性层的表面粗糙度为100 / mm，为10000nm 3以下，空间频率为500 / mm的密度的功率谱为50〜500nm 3，平均片状直径 的铁磁六方晶系铁氧体颗粒为15〜35nm。

公开(公告)号：US06673477B2

公开(公告)日：2004-01-06

申请号：US10037220

申请日：2001-11-09

申请人： Nobuo Yamazaki ,  Shinji Saito

发明人： Nobuo Yamazaki ,  Shinji Saito

IPC分类号： B32B516

CPC分类号： G11B5/7305 ,  G11B5/016 ,  G11B5/70 ,  G11B5/825 ,  Y10T428/265

摘要： A floppy disk-shaped magnetic recording medium of high recording density comprises a non-magnetic support provided on each side thereof sequentially with a substantially non-magnetic lower layer and a magnetic layer containing a ferromagnetic powder dispersed in a binder, and is used under a condition that a velocity of the medium relative to a magnetic head is at least 14 m/sec: wherein the non-magnetic lower layer has a thickness adjusted to be from five to twenty times as great as a maximum height of projections on the non-magnetic support surface, thereby achieving reduction in error rate increase.

摘要翻译： 具有高记录密度的软磁盘形磁记录介质包括依次具有基本上非磁性的下层和包含分散在粘合剂中的铁磁性粉末的磁性层的每侧上提供的非磁性载体， 条件是介质相对于磁头的速度为至少14m / sec：其中非磁性下层的厚度调整为非极性下层的突起的最大高度的5至20倍， 磁性支撑表面，从而实现误差率增加的降低。

公开(公告)号：US06641891B2

公开(公告)日：2003-11-04

申请号：US10112502

申请日：2002-03-27

申请人： Hiroaki Doushita ,  Nobuo Yamazaki

发明人： Hiroaki Doushita ,  Nobuo Yamazaki

IPC分类号： G11B5706

CPC分类号： G11B5/714 ,  G11B5/70 ,  Y10T428/256 ,  Y10T428/257 ,  Y10T428/265

摘要： Provided is a particulate magnetic recording medium having good processing properties and being inexpensive to produce, similar to prior recording media, wherein by controlling the magnetic clusters that appear due to recording at short wavelengths and thinning of the magnetic layer, good high-density characteristics are achieved in combination with MR heads. The magnetic recording medium comprising an essentially nonmagnetic lower layer and a magnetic layer comprising a ferromagnetic powder and a binder in this order, wherein the magnetic layer has a thickness ranging from 0.01 to 0.15 &mgr;m and a coercivity equal to or higher than 159 kA/m, ferromagnetic particles contained in the ferromagnetic powder have a size less than ½ of the minimum recording wavelength, and an average size of magnetic cluster at DC erase is equal to or higher than 0.5×104 nm2 and less than 5.5×104 nm2.

摘要翻译： 提供了类似于现有记录介质的具有良好加工性能并且制造成本低的颗粒状磁记录介质，其中通过控制由于在短波长下记录而出现的磁簇和磁层的变薄，良好的高密度特性 与MR主管结合。 该磁记录介质依次包括基本上非磁性的下层和包含铁磁粉末和粘合剂的磁性层，其中磁性层的厚度范围为0.01至0.15μm，矫顽力等于或高于159kA / m 包含在铁磁粉末中的铁磁颗粒的尺寸小于最小记录波长的1/2，并且DC擦除时的磁簇的平均尺寸等于或高于0.5×10 4 nm 2且小于5.5×10 5 4nm 2。

公开(公告)号：US5622174A

公开(公告)日：1997-04-22

申请号：US130834

申请日：1993-10-04

申请人： Nobuo Yamazaki

发明人： Nobuo Yamazaki

IPC分类号： A61B8/08 ,  G01S7/52 ,  G01S15/58 ,  G01S15/89 ,  A61B8/12

CPC分类号： G01S15/8979 ,  A61B8/463 ,  A61B8/488 ,  G01S15/8984 ,  G01S7/52071 ,  G01S7/52085 ,  G01S15/899 ,  G01S15/8993 ,  G01S7/5206 ,  G01S7/52063 ,  G01S7/52073

摘要： There is provided an ultrasonic diagnosis apparatus in which a region containing an organ of an object being examined is diagnosed by means of ultrasonic beams, the organ being in motion, the apparatus comprising: an element for scanning the region by the ultrasonic beams to obtain ultrasonic echo signals having Doppler shift; an element for calculating movement velocities every sampling volume on the basis of the ultrasonic echo signals; and an element for displaying in color the movement velocities.

摘要翻译： 提供了一种超声波诊断装置，其中通过超声波束来诊断包含被检查物体的器官的区域，所述器官在运动中，所述装置包括：用于通过超声波束扫描该区域以获得超声波的元件 具有多普勒频移的回波信号; 基于超声回波信号计算每个采样体积的移动速度的元件; 以及用于以颜色显示移动速度的元素。

公开(公告)号：US5601916A

公开(公告)日：1997-02-11

申请号：US524680

申请日：1995-09-07

申请人： Nobuo Yamazaki ,  Hitoshi Noguchi ,  Shinji Saito

发明人： Nobuo Yamazaki ,  Hitoshi Noguchi ,  Shinji Saito

IPC分类号： C09D5/23 ,  C09D7/12 ,  G11B5/68 ,  G11B5/70 ,  G11B5/706 ,  G11B5/716 ,  G11B5/738

CPC分类号： G11B5/716 ,  G11B5/70 ,  G11B5/70678 ,  G11B5/738 ,  Y10S428/90 ,  Y10T428/257 ,  Y10T428/265

摘要： A magnetic recording medium is described, which comprises a nonmagnetic support having thereon at least one magnetic layer containing ferromagnetic particles dispersed in a binder, wherein the magnetic recording medium has at least one magnetic layer containing at least hexagonal ferrite magnetic particles and the magnetic layer containing the hexagonal ferrite magnetic particles has a coercive force, Hc, of from 1,300 to 5,000 Oe, a ratio of the Hc to an anisotropic magnetic field HK thereof, Hc/HK, of from 0.30 to 1.0, and a squareness ratio of in-plane direction, SQ, of from 0.65 to 1.00.

摘要翻译： 描述了一种磁记录介质，其包括其上具有至少一个含有分散在粘合剂中的铁磁性颗粒的磁性层的非磁性载体，其中该磁记录介质具有至少一个至少含有六方晶系铁氧体磁性颗粒的磁性层和含有 六方晶系铁氧体磁性颗粒的矫顽力Hc为1,300-5,000Oe，Hc与各向异性磁场HK之比Hc / HK为0.30至1.0，平面比为 方向，SQ从0.65到1.00。

公开(公告)号：US5597638A

公开(公告)日：1997-01-28

申请号：US181239

申请日：1994-01-13

申请人： Shinji Saito ,  Nobuo Yamazaki

发明人： Shinji Saito ,  Nobuo Yamazaki

IPC分类号： G11B5/70 ,  C09D5/23 ,  C09D7/12 ,  G11B5/706 ,  G11B5/716 ,  G11B5/738 ,  G11B5/848 ,  G11B5/852 ,  B05D5/12 ,  G11B5/66

CPC分类号： G11B5/852 ,  G11B5/716 ,  G11B5/738 ,  G11B5/848 ,  Y10S428/90 ,  Y10T428/24355 ,  Y10T428/265

摘要： The present invention provides a magnetic recording medium comprising a nonmagnetic layer mainly having an inorganic nonmagnetic particle dispersed in a binder provided on a nonmagnetic flexible support and a magnetic layer having a ferromagnetic particle dispersed in a binder, characterized in that the magnetic layer comprises a hexagonal ferrite magnetic material and exhibits a thickness of 1 .mu.m or less, or 2.5 .mu.m or less in total if there are a plurality of magnetic layers, a central line average surface roughness of 0.006 .mu.m or less, SFD of 0.3 or less in the longitudinal direction on the plane and Br/Hc of less than 1.5, whereby the short wavelength recording can be remarkably improved in electro-magnetic conversion characteristics, particularly 7 MHz output.

摘要翻译： 本发明提供一种磁记录介质，其包含主要具有分散在非磁性柔性支撑体上的粘结剂中的无机非磁性颗粒的非磁性层和分散在粘合剂中的铁磁颗粒的磁性层，其特征在于，磁性层包括六方晶系 如果存在多个磁性层，中心线平均表面粗糙度为0.006μm以下，SFD为0.3以下，SFD为0.3以下，则铁素体磁性材料的厚度为1μm以下，总共为2.5μm以下 平面上的纵向方向和Br / Hc小于1.5，从而可以显着提高电磁转换特性，特别是7MHz输出的短波长记录。

公开(公告)号：US5081996A

公开(公告)日：1992-01-21

申请号：US556524

申请日：1990-07-24

申请人： Schuichi Kawasaki ,  Nobuo Yamazaki ,  Takeshi Sato

发明人： Schuichi Kawasaki ,  Nobuo Yamazaki ,  Takeshi Sato

IPC分类号： G01N29/26 ,  A61B8/06 ,  G01S7/52 ,  G01S15/89

CPC分类号： G01S15/8979 ,  B82Y15/00 ,  G01S15/8906 ,  G01S15/8977 ,  G01S7/52046 ,  G01S7/5206 ,  G01S7/52071 ,  G01S7/52085

摘要： An ultrasonic imaging apparatus comprises an ultrasonic transducer for transmitting ultrasonic beams to a subject and converting echoes from the subject to echo signals, a scan controller for selectively switching a scanning mode between a first scanning mode in which a predetermined number of rasters in each of a plurality of scanning blocks each having the predetermined number of rasters are scanned repeatedly and echo signals at a predetermined number of sample points in each of the rasters are extracted block by block and a second scanning mode in which a plurality of rasters are repeatedly scanned a predetermined number of times while at least one raster is shifted sequentially and data are output at constant intervals, a transmitter/receiver circuit for driving the ultrasonic transducer in accordance with a scanning mode selected by the scan controller, processes the echo signals output from the ultrasonic transducer to output an image signal and a television monitor for visually displaying the image signal.

摘要翻译： 超声波成像装置包括用于将超声波束发射到对象并将来自受试者的回波转换成回波信号的超声波换能器，扫描控制器，用于在第一扫描模式之间有选择地切换扫描模式，在第一扫描模式中， 重复扫描具有预定数量的光栅的多个扫描块，并且逐块地提取每个光栅中的预定数量的采样点处的回波信号，并且第二扫描模式，其中多个光栅重复扫描预定的 在至少一个光栅顺序移位并以恒定间隔输出数据的次数的同时，根据由扫描控制器选择的扫描模式驱动超声波换能器的发射器/接收器电路处理从超声换能器输出的回波信号 以便视觉地输出图像信号和电视监视器 显示图像信号。

公开(公告)号：US4859881A

公开(公告)日：1989-08-22

申请号：US138865

申请日：1987-12-29

申请人： Yoshihiro Yamamoto ,  Tsutomu Kume ,  Nobuo Yamazaki ,  Fumiharu Hashimoto ,  Koichi Ohya

发明人： Yoshihiro Yamamoto ,  Tsutomu Kume ,  Nobuo Yamazaki ,  Fumiharu Hashimoto ,  Koichi Ohya

IPC分类号： H03H11/12

CPC分类号： H03H11/1217

摘要： A double integration type filter circuit, consisting of a pair of integrators connected in series with each other, has a changeover switch for commutating the filter characteristics to a filter configuration which emphasizes portions proper to the characteristics of the filter circuit to facilitate filter adjustment to reduce filter adjustment time and to realize improved accuracy while providing for automatic adjustment of the filter characteristics.