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    • 21. 发明授权
    • Robust detection of data modulated into a timing based servo
    • 对基于定时的伺服调制的数据的鲁棒检测
    • US06239939B1
    • 2001-05-29
    • US09370256
    • 1999-08-09
    • Nhan Xuan BuiJunichi FukudaGlen Alan JaquetteJohn Alexander KoskiKazuhiro Tsuruta
    • Nhan Xuan BuiJunichi FukudaGlen Alan JaquetteJohn Alexander KoskiKazuhiro Tsuruta
    • G11B5584
    • G11B5/592G11B5/584
    • A detector and method for detecting data modulated into a timing based servo pattern prerecorded on a media, comprising shifts of pairs of non-parallel transition stripes arranged in a frame of two bursts. Timing intervals between sequential transition stripes are detected. Interval comparison logic compares selected timing intervals and indicates whether the compared intervals represent a “0”, or a “1”. First and second counters respectively increment the number of the compared intervals representing a “0” and representing a “1” in each frame. Bit comparison logic compares, for each frame, the incremented numbers representing a “0” and a “1” to a predetermined criteria and, upon one of the numbers meeting the criteria, identifies the corresponding “0” or “1” as the bit value for the frame. The bits are data comprising longitudinal position words arranged in a linear sequence. Sequence logic calculates the next sequential position word from an immediately preceding word and determines whether the detected word is in the linear sequence as a validity check, and provides the calculated word as the output. Thus, the correct position word is provided at the output even if the detected word is invalid.
    • 一种检测器和方法,用于检测被调制到在介质上预先记录的基于时序的伺服模式中的数据,包括以两个脉冲串的帧布置的非平行过渡条带对的移位。 检测顺序过渡条纹之间的时序间隔。 间隔比较逻辑比较所选择的定时间隔,并指示所比较的间隔是“0”还是“1”。 第一和第二计数器分别增加表示“0”的比较间隔的数量,并在每一帧中表示“1”。 比较比较逻辑对于每个帧将对于预定标准表示“0”和“1”的递增数字进行比较,并且在符合标准的数字之一中将相应的“0”或“1”标识为位 框架的值。 位是包括以线性顺序排列的纵向位置字的数据。 顺序逻辑从紧前面的字计算下一个顺序位置字,并确定所检测的字是否在线性序列中作为有效性检查,并将计算出的字提供为输出。 因此,即使检测到的字无效,也在输出端提供正确的位置字。
    • 22. 发明授权
    • Adaptive servo gap detection for timing based servo
    • 基于定时的伺服自适应伺服间隙检测
    • US06278571B1
    • 2001-08-21
    • US09314078
    • 1999-05-19
    • Nhan Xuan BuiJunichi FukudaGlen Alan JaquetteJohn Alexander KoskiKazuhiro Tsuruta
    • Nhan Xuan BuiJunichi FukudaGlen Alan JaquetteJohn Alexander KoskiKazuhiro Tsuruta
    • G11B5584
    • G11B21/103G11B5/00878G11B5/584G11B27/13G11B2220/93
    • Disclosed are a method and a detector for adaptively detecting servo gaps in a timing based servo pattern prerecorded on a variable velocity media. The timing based servo pattern has groups of repeated pairs of non-parallel transition stripes arranged in bursts, the bursts separated by servo gaps whose length is variable. A servo system sensor senses the transition stripes in the longitudinal direction of the media. A group interval detector coupled to the sensor detects the timing interval between the same slope transition stripes of two sequential groups of bursts. A divider divides the detected group timing interval by a predetermined divisor to provide a divided timing interval gap detection threshold. A sequential stripe interval detector coupled to the sensor measures the timing interval between stripes, and a comparator compares the divided timing interval and the timing interval, identifying a servo gap upon the measured timing interval at least equaling the gap threshold. The detector responds to “valid” signals which indicate the validity of the detected group timing interval, repeating operation of the divider to update the gap threshold, and repeating operation of the comparator with the updated gap threshold to continue to identify the servo gaps.
    • 公开了一种用于在预先记录在可变速度介质上的基于定时的伺服模式中自适应地检测伺服间隙的方法和检测器。 基于定时的伺服模式具有以突发方式排列的重复的非平行过渡条带对,这些脉冲串由长度可变的伺服间隙分开。 伺服系统传感器感测介质沿纵向的过渡条纹。 耦合到传感器的组间隔检测器检测两个连续的突发组的相同斜率跃迁条之间的定时间隔。 分频器将检测到的组定时间隔除以预定的除数以提供划分的定时间隔间隙检测阈值。 耦合到传感器的顺序条带间隔检测器测量条纹之间的定时间隔,并且比较器比较划分的定时间隔和定时间隔,在测量的定时间隔上识别至少等于间隙阈值的伺服间隙。 检测器响应指示检测到的组定时间隔的有效性的“有效”信号,重复分频器的操作以更新间隙阈值,并且以更新的间隙阈值重复操作比较器以继续识别伺服间隙。
    • 24. 发明申请
    • ANTENNA DEVICE
    • 天线设备
    • US20120139797A1
    • 2012-06-07
    • US13390522
    • 2010-08-20
    • Junichi Fukuda
    • Junichi Fukuda
    • H01Q1/38
    • H01Q21/08H01Q9/0407H01Q21/065
    • An antenna device includes a plurality of antenna elements, a feed circuit which feeds power to the plurality of antenna elements, a conductive chassis which accommodates the plurality of antenna elements and the feed circuit and which is provided with a plurality of opening portions as being opposed respectively to the plurality of antenna elements, and a sheet-shaped cover which covers the plurality of opening portions of the conductive chassis to seal the plurality of opening portions. In addition to covering the plurality of opening portions of the conductive chassis, the sheet-shaped cover may cover the entire conductive chassis. A patch antenna may be utilized as each of the plurality of antenna elements.
    • 一种天线装置,包括:多个天线元件,向多个天线元件供电的馈电电路,容纳多个天线元件和馈电电路的导电底座,并且设置有多个开口部, 分别连接到多个天线元件和覆盖导电底座的多个开口部分以密封多个开口部分的片状盖。 除了覆盖导电底盘的多个开口部分之外,片状盖可以覆盖整个导电底盘。 贴片天线可以用作多个天线元件中的每一个。
    • 27. 发明授权
    • Collision detection system for a vehicle
    • 车辆碰撞检测系统
    • US4950914A
    • 1990-08-21
    • US174555
    • 1988-03-29
    • Norimitsu KuriharaYoshikazu TsuchiyaMakie MorotaJunichi Fukuda
    • Norimitsu KuriharaYoshikazu TsuchiyaMakie MorotaJunichi Fukuda
    • B60R21/01G01P15/08G01P15/09G01P21/00
    • B60R21/01332B60R21/0132G01P15/0891G01P15/09G01P21/00
    • A collision detection system for a vehicle comprising an acceleration sensor for sensing the acceleration and deceleration of the vehicle wherein the acceleration sensor is a piezoelectric sensor; signal processing circuit coupled to the piezoelectric sensor for generating a first output when the vehicle deceleration is greater than a predetermined amount. A diagnostic pulse generator is coupled to the piezoelectric sensor for applying a diagnostic pulse to the piezoelectric sensor for distorting the piezoelectric sensor, thereby causing the piezoelectric sensor to generate an electrical output. The electrical output is applied to the signal processing circuit wherein the signal processing circuit produces a second output in response thereto. The piezoelectric sensor is mounted on a pendulum such that when the vehicle accelerates or decelerates, the pendulum moves relative to the vehicle thereby distorting the piezoelectric sensor whereby the piezoelectric sensor produces an output as a function of the distortion. The piezoelectric sensor includes an electrode which is divided into a plurality of electrode segments. At least one of the electrode segments is an output electrode for providing an electrical signal as a function of the distortion of the piezoelectric sensor and at least one of the electrode segments is an input electrode for receiving an electrical signal and distorting the piezoelectric sensor in response thereto.
    • 一种用于车辆的碰撞检测系统,包括用于感测车辆的加速和减速的加速度传感器,其中加速度传感器是压电传感器; 耦合到压电传感器的信号处理电路,用于当车辆减速度大于预定量时产生第一输出。 诊断脉冲发生器耦合到压电传感器,用于向压电传感器施加诊断脉冲以使压电传感器变形,从而使压电传感器产生电输出。 电输出被施加到信号处理电路,其中信号处理电路响应于此产生第二输出。 压电传感器安装在摆锤上,使得当车辆加速或减速时,摆锤相对于车辆移动,从而扭曲压电传感器,由此压电传感器产生作为失真的函数的输出。 压电传感器包括被分成多个电极段的电极。 电极段中的至少一个是用于提供作为压电传感器的失真的函数的电信号的输出电极,并且至少一个电极段是用于接收电信号并且响应于压电传感器变形的输入电极 到此。
    • 30. 发明申请
    • PLANAR ANTENNA, AND COMMUNICATION DEVICE AND CARD-TYPE TERMINAL USING THE ANTENNA
    • 平面天线,以及使用天线的通信设备和卡类型终端
    • US20100026586A1
    • 2010-02-04
    • US12528141
    • 2008-03-11
    • Akio KuramotoJunichi Fukuda
    • Akio KuramotoJunichi Fukuda
    • H01Q1/38
    • H01Q9/285H01Q1/2208H01Q1/38H01Q1/48H01Q9/40
    • There are provided a planar antenna that reduces interactions between an antenna section and a peripheral circuit section on each other's electric operations in an apparatus in which an antenna and a peripheral circuit are arranged together on a printed circuit board, and a communication device and a card-type terminal that use the planar antenna. The planar antenna has the antenna section and the peripheral circuit section which are arranged on the printed circuit board. The planar antenna includes: on one surface of the printed circuit board, a plate element that constitutes the antenna section, a microstrip line that is connected with the plate element and feeds electricity from a peripheral circuit to the plate element, and a peripheral circuit mounting area in which the peripheral circuit section is arranged; and, on the other surface of the printed circuit board, a first ground portion that constitutes a ground-side conductor of the peripheral circuit section, and a second ground portion that constitutes a ground-side conductor of the microstrip line. The second ground portion is arranged on the printed circuit board other than the first ground portion. The connection between the plate element and the microstrip line is located on the side of the second ground portion away from the first ground portion.
    • 提供了一种平面天线,其在将天线和外围电路布置在印刷电路板上的装置中减少天线部分和外围电路部分之间的相互作用,并且通信装置和卡 型端子,使用平面天线。 平面天线具有布置在印刷电路板上的天线部分和外围电路部分。 平面天线包括:在印刷电路板的一个表面上,构成天线部分的板状元件,与板状元件连接并从外围电路向板状元件供电的微带线,以及周边电路安装 配置外围电路部的区域; 并且在印刷电路板的另一个表面上构成构成外围电路部分的接地侧导体的第一接地部分和构成微带线的接地侧导体的第二接地部分。 第二接地部分布置在除第一接地部分之外的印刷电路板上。 板元件和微带线之间的连接位于第二接地部分的远离第一接地部分的一侧。