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    • 12. 发明授权
    • Digital equalizer capable of varying the center frequency, quality
factor, and gain to perform various frequency characteristics
    • 数字均衡器能够改变中心频率,品质因数和增益,以执行各种频率特性
    • US4524422A
    • 1985-06-18
    • US187328
    • 1980-09-15
    • Masao Kasuga
    • Masao Kasuga
    • H03G5/00H03H17/04H04B3/14G06F15/31
    • H03G5/005H03H17/04H04B3/145
    • A digital filter having a band-pass filter characteristic or a band-elimination characteristic is constructed by a designing procedure comprising a step in which a function H(z) is obtained from a Z-transform of a bi-quad transfer function H(s) in a Laplace transfer form comprising conjugate pairs of poles and zeros, and establishing a center frequency of the filter characteristic from the radius of a circle in the s-plane in which the poles and zeros of the bi-quad transfer function H(s) are on the same circle, a step in which a quality factor Q of the filter characteristic is established so as to satisfy the following two equations (I) and (II) in which .sigma..sub.1 is the real-axis projection part and .omega..sub.1 is the imaginary-axis projection part of the above two poles in the s-plane, and .sigma..sub.2 is the real-axis projection part and .omega..sub.2 is the imaginary-axis projection part of the above two zeros, and a step in which a gain at the center frequency of the filter characteristic is established from a ratio .sigma..sub.2 /.sigma..sub.1 of the real-axis projection part .sigma..sub.1 of the poles and the real-axis projection part .sigma..sub.2 of the zeros in the s-plane ##EQU1##
    • 具有带通滤波器特性或带消除特性的数字滤波器通过包括以下步骤的设计过程构成,其中从双向传递函数H(s)的Z变换获得函数H(z) ),包括共轭极点和零点的拉普拉斯转移形式,并且从双平面传递函数H(s)的极点和零点的s平面中的圆的半径建立滤波器特征的中心频率 )在同一个圆上,其中建立了滤波器特性的质量因子Q以满足以下两个等式(I)和(II)的步骤,其中σ1是实轴投影部分,ω1 是s平面中上述两极的虚轴投影部分,sigma2是实轴投影部分,ω2是上述两个零点的虚轴投影部分,其中a 在滤波器特性的中心频率处的增益是esta (s)中的零点的实轴投影部分σ1与实线轴投影部分sigma 2的比率sigma 2 / s 1发生,
    • 13. 发明授权
    • System for converting number of scanning lines
    • 用于转换扫描行数的系统
    • US4471381A
    • 1984-09-11
    • US357132
    • 1982-03-11
    • Masao KasugaNobuaki TakahashiTakeshi Shibamoto
    • Masao KasugaNobuaki TakahashiTakeshi Shibamoto
    • H04N7/01H04N5/02
    • H04N7/0135H04N7/01
    • A system for converting number of scanning lines converts a first number of scanning lines of a first digital video signal into a second number of scanning lines of a second digital video signal. The system comprises a discrete signal obtaining circuit supplied with the first digital video signal, for successively re-arranging a plurality of picture element information arranged along lines in a vertical direction with respect to a picture frame indicated by the first digital video signal within a time interval corresponding to the first number of scanning lines in units of each of the lines in the vertical direction in a time series manner, to obtain a discrete signal having a sampling frequency equal to a horizontal scanning frequency of the first digital video signal, a sampling frequency converter for converting the sampling frequency of the discrete signal obtained from the discrete signal obtaining circuit into a frequency equal to a horizontal scanning frequency of the second digital video signal, and a second video signal obtaining circuit for successively re-arranging an output of the sampling frequency converter in units of a plurality of picture element information along a direction of horizontal scanning lines in accordance with the second digital video signal in a time series manner, to obtain the second digital video signal using the second number of scanning lines.
    • 用于转换扫描线数量的系统将第一数字视频信号的第一数量的扫描线转换成第二数字视频信号的第二数量的扫描线。 该系统包括提供有第一数字视频信号的离散信号获取电路,用于在一段时间内相对于由第一数字视频信号指示的画面沿着垂直方向的线排列重新排列的多个像素信息 以与时间序列方式的垂直方向上的每行的单位相对应的第一扫描线数的间隔,以获得具有等于第一数字视频信号的水平扫描频率的采样频率的离散信号,采样 频率转换器,用于将从离散信号获取电路获得的离散信号的采样频率转换成等于第二数字视频信号的水平扫描频率的频率;以及第二视频信号获取电路,用于连续重新布置 采样频率转换器以多个像素信息a1为单位 以时间序列方式按照第二数字视频信号的水平扫描线的方向,使用第二数量的扫描线来获得第二数字视频信号。
    • 17. 发明授权
    • Ultrasonic motor
    • 超声波电机
    • US6064139A
    • 2000-05-16
    • US321581
    • 1994-10-11
    • Fujio OzawaTakashi SatoMasao KasugaShuji Otawa
    • Fujio OzawaTakashi SatoMasao KasugaShuji Otawa
    • H01L41/09H02N2/16H01L41/08
    • H02N2/163H02N2/14
    • An ultrasonic motor capable of being accurately step-driven comprises a vibrating member piezoelectrically vibrated for driving and halting a movable member. A driving wave is generated for vibrating the vibrating member to drive the movable member, and a halting wave is generated for vibrating the vibrating member to halt the movable member. The driving wave can be either a travelling wave or a standing wave, and the halting wave is a standing wave. The movable member is divided into a plurality of portions, and when the vibrating member is driven by the halting wave, the portions of the movable member become centered at respective nodal portions of the standing halting wave, causing the movable member to stop rotating so that the ultrasonic motor can be accurately step-driven.
    • 能够精确地逐步驱动的超声波马达包括压电振动的振动部件,用于驱动和停止可动部件。 产生用于使振动部件振动以驱动可动部件的驱动波,产生使振动部件振动以停止可动部件的停止波。 驱动波可以是行波还是驻波,停波是驻​​波。 可移动部件被分成多个部分,并且当振动部件被停止波驱动时,可移动部件的部分在驻停的波浪的相应节点处居中,从而使可动部件停止旋转,从而 超声波电机可以精确地逐级驱动。
    • 20. 发明授权
    • Ultrasonic motor and electronic apparatus equipped with ultrasonic motor
    • 超声波电机和配备超声波电机的电子设备
    • US5416374A
    • 1995-05-16
    • US88181
    • 1993-07-06
    • Tatsunori InoueMasao KasugaMakoto SuzukiKenji SuzukiFujio OzawaKo YamazakiShinichi Hayashizaki
    • Tatsunori InoueMasao KasugaMakoto SuzukiKenji SuzukiFujio OzawaKo YamazakiShinichi Hayashizaki
    • G04C3/12H01L41/04H02N2/00H02N2/14H02N2/16H01L41/08
    • H02N2/166H02N2/142
    • An ultrasonic motor comprises a traveling wave generating circuit for generating a traveling wave signal effective to drive a moving member, and a standing wave generating circuit for generating at least one type of standing wave signal effective to stop movement of the moving member. A switching circuit is receptive of the traveling wave signal and the standing wave signal for selecting one of the traveling wave and the standing wave signals as an output signal. A piezoelectric vibrator drive circuit is receptive of the output signal of the switching circuit for producing a high-frequency voltage signal. At least one piezoelectric vibrator includes an electrode pattern and is adapted to be driven by the voltage signal to undergo expansion and compression. A vibrating member is fixed to the piezoelectric vibrator and vibrationally driven by the expansion and compression movement of the piezoelectric vibrator. A moving member is disposed on the vibrating member to be frictionally driven by expansion and compression movement of the piezoelectric vibrator. The moving member is provided with a plurality of load portions for stopping movement of the moving member, the load portions being greater in number than the number of nodes of the standing wave.
    • 超声波马达包括用于产生有效驱动移动部件的行波信号的行波发生电路和产生至少一种有效停止移动部件移动的驻波信号的驻波发生电路。 开关电路接受行波信号和用于选择行波和驻波信号之一的驻波信号作为输出信号。 压电振动器驱动电路接受用于产生高频电压信号的开关电路的输出信号。 至少一个压电振动器包括电极图案,并且适于由电压信号驱动以进行膨胀和压缩。 振动部件被固定在压电振动器上并通过压电振动器的膨胀和压缩运动而振动地驱动。 移动构件设置在振动构件上,以通过压电振动器的膨胀和压缩运动来摩擦地驱动。 移动构件设置有用于停止移动构件的移动的多个负载部分,负载部分的数量大于驻波的节点数量。