Ultrasonic Doppler flow meter
    31.
    发明授权
    Ultrasonic Doppler flow meter 失效
    超声多普勒流量计

    公开(公告)号:US5111825A

    公开(公告)日:1992-05-12

    申请号:US609657

    申请日:1990-11-06

    摘要: A flow meter for detecting a flow speed in such a manner that an ultrasonic pulsed continuous wave is repeatedly transmitted toward an object at predetermined intervals T, a phase vector indicative of the phase of a reception signal due to the reflected wave is produced at the predetermined intervals, the phase difference between the present phase vector and the preceding phase vector is detected, and a Doppler frequency is calculated from the average value of a plurality of phase difference values to obtain the speed of the object. The phase difference values are classified into a first group consisting of position phase difference values and a second group consisting of negative phase difference values, the cosine and sine values of the central angle of the positive phase difference values and the cosine and sine values of the central angle of the negative phase difference values are calculated, and the argument of a vector indicated by the weighted sum of cosine values and the weighted sum of sine values is calculated to be used as an average phase angle.

    摘要翻译: 一种用于以这样的方式检测流速的流量计,即超声波脉冲连续波以预定间隔T被重复地传送到物体,产生指示由于反射波引起的接收信号的相位的相位矢量, 检测当前相位矢量和前一相位矢量之间的相位差,并根据多个相位差值的平均值计算多普勒频率,以获得对象的速度。 相位差值被分为由位置相位差值组成的第一组和由负相位差值组成的第二组,正相位差的中心角的余弦和正弦值以及正相位差的余弦和正弦值 计算负相位差值的中心角,并且计算由余弦值的加权和指示的矢量的自变量和正弦值的加权和,以用作平均相位角。

    Magnetic head driving apparatus
    33.
    发明授权
    Magnetic head driving apparatus 失效
    磁头驱动装置

    公开(公告)号:US4805057A

    公开(公告)日:1989-02-14

    申请号:US41597

    申请日:1987-04-22

    CPC分类号: H01L41/083 H01L41/094

    摘要: An apparatus for driving a magnetic head including a monolithic bimorph member. A first end of the monolithic bimorph member has the magnetic head fixed thereto, and the other end thereof is fixed to a support member to be supported by the support member. The monolithic bimorph member comprises a piezoelectric ceramic sintered body formed from a plurality of electrodes stacked alternately with ceramic layers. The plurality of electrodes includes first and second electrode groups which are electrically connected with each other by conductors in through holes. The through holes are provided in portions of the sintered body close to the end fixed to the support member.

    摘要翻译: 一种用于驱动包括单片双压电晶片的磁头的装置。 整体式双压电元件的第一端部固定有磁头,另一端固定在支承部件上,由支承部件支承。 整体式双压电元件包括​​由与陶瓷层交替堆叠的多个电极形成的压电陶瓷烧结体。 多个电极包括通孔中的导体彼此电连接的第一和第二电极组。 所述通孔设置在所述烧结体的靠近固定到所述支撑构件的端部的部分。

    Ultrasonic receiving apparatus
    34.
    发明授权
    Ultrasonic receiving apparatus 失效
    超声波接收装置

    公开(公告)号:US4679176A

    公开(公告)日:1987-07-07

    申请号:US673945

    申请日:1984-11-21

    IPC分类号: G01S7/52 G10K11/34 G01S3/80

    CPC分类号: G01S7/52025 G10K11/346

    摘要: In an ultrasonic imaging apparatus, when a sampling time space determined corresponding to the respective phases of receiving signals from transducer elements adjacent to each other is shorter than the settling time of sample and hold circuits, these receiving signals are sampled at the same time. Noise is prevented from being mixed with the sample and hold values of these signals.

    摘要翻译: 在超声波成像装置中,当相应于来自相邻的换能器元件的接收信号的相位确定的采样时间空间比采样和保持电路的建立时间短时,这些接收信号被同时采样。 防止噪声与这些信号的采样和保持值混合。

    Piezoelectric device with surface charge shunt
    35.
    发明授权
    Piezoelectric device with surface charge shunt 失效
    具有表面电荷分流的压电器件

    公开(公告)号:US4451753A

    公开(公告)日:1984-05-29

    申请号:US169219

    申请日:1980-07-15

    摘要: A bulk wave piezoelectric device comprises a polarized ferroelectric ceramic plate, and electrodes formed on two main surfaces thereof, respectively, intersecting the polarization axis direction. The electrodes are connected to each other by means of an external resistance having a predetermined resistance value. The resistance value is selected to be smaller than the inherent resistance value of the ferroelectric ceramic plate between the two main surfaces. Positive and negative electric charges are stored on the two electrodes due to the pyroelectric effect responsive to a change of the temperature of the ferroelectric ceramic plate. The potential difference caused by the electric charges thus stored is rapidly decreased through the external resistance.

    摘要翻译: 体波压电器件包括偏振铁电陶瓷板和分别形成在与偏振轴方向交叉的两个主表面上的电极。 电极通过具有预定电阻值的外部电阻相互连接。 电阻值被选择为小于两个主表面之间的铁电陶瓷板的固有电阻值。 由于响应于铁电陶瓷板的温度变化的热电效应,正电荷和负电荷存储在两个电极上。 由这样存储的电荷引起的电位差通过外部电阻迅速降低。

    Method for producing piezoelectric ceramics
    36.
    发明授权
    Method for producing piezoelectric ceramics 失效
    压电陶瓷的制造方法

    公开(公告)号:US4230589A

    公开(公告)日:1980-10-28

    申请号:US67419

    申请日:1979-08-17

    申请人: Toshio Ogawa

    发明人: Toshio Ogawa

    CPC分类号: H01L41/187

    摘要: A method for producing piezoelectric ceramics of a Pb(Sn.sub..alpha. Sb.sub.1-.alpha.)O.sub.3 -PbTiO.sub.3 system is disclosed which comprises providing a piezoelectric ceramic composition expressed by the general formula:xPb(Sn.sub..alpha. Sb.sub.1-.alpha.)O.sub.3 -PbTiO.sub.3wherein subscripts .alpha., x and y are mole fractions of the respective components and have the following values, x+y=1.00, 1/4.ltoreq..alpha..ltoreq.3/4, 0.01.ltoreq.x.ltoreq.0.40, and 0.60.ltoreq.y.ltoreq.0.99, forming powder of the composition into forming bodies, and firing the forming bodies in an oxygen atmosphere containing not less than 80 vol % of oxygen. The firing in the oxygen atmosphere is effected at a temperature not less than 1000.degree. C. A part of lead in the composition may be replaced with not more than 20 atomic percent of at least one metal selected from the group consisting of Ba, Ca, Sr and Cd. The composition may contain a small amount of Mn, Mg and/or Cr. Fine dense ceramics with low porosity, small average size and fine grain size are produced which can be applied to various electronic parts.

    摘要翻译: 公开了一种制备Pb(Sn-Sb-α)O3-PbTiO3系统的压电陶瓷的方法,该方法包括提供由通式xPb(Sn-Sb-α)O3-PbTiO3表示的压电陶瓷组合物,其中下标α, x和y是相应组分的摩尔分数,并且具有以下值:x + y = 1.00,1 / 4,α= 3 /4,0.01≤x≤0.40, = y <0.99,将组合物的粉末形成成型体,并在含有不少于80体积%氧气的氧气氛中焙烧成形体。 氧气氛中的烧成是在不低于1000℃的温度下进行的。组合物中铅的一部分可以用不大于20原子%的至少一种选自Ba,Ca, Sr和Cd。 该组合物可含有少量的Mn,Mg和/或Cr。 产生孔隙率低,平均粒径小,粒度细的细致密陶瓷,可应用于各种电子部件。

    Redundancy system for data communication
    37.
    发明授权
    Redundancy system for data communication 失效
    数据通信冗余系统

    公开(公告)号:US4017828A

    公开(公告)日:1977-04-12

    申请号:US594799

    申请日:1975-07-10

    CPC分类号: H04L1/02

    摘要: A redundancy system for data communications upon two duplicate communication channels, each having transmission and reception circuits, characterized by a switching circuit for selecting one of said two communication channels, a single error detection circuit for detecting an error in the signal transmitted, and a control circuit for the switching circuit arranged to cause said two communication channels to alternately transmit signals when both the channels are in normal operation, and to cause one of said two channels to be selected when the other fails. The two channels share the error detection circuit and the control circuit and can therefore be built at a reduced cost and operated efficiently. Since the two channels are regularly checked for errors, they are operated with increased reliability.

    摘要翻译: 一种用于在两个重复通信信道上进行数据通信的冗余系统,每个具有发送和接收电路,其特征在于用于选择所述两个通信信道之一的切换电路,用于检测发送的信号中的错误的单个错误检测电路和控制 所述开关电路被布置成当两个信道都处于正常操作时使所述两个通信信道交替发送信号,并且当另一个信道失败时,使所述两个信道之一被选择。 两个通道共享错误检测电路和控制电路,因此可以降低成本并有效地运行。 由于定期检查两个通道的错误,因此可靠性更高。

    Semiconductor memory
    39.
    发明授权
    Semiconductor memory 有权
    半导体存储器

    公开(公告)号:US07937645B2

    公开(公告)日:2011-05-03

    申请号:US11443109

    申请日:2006-05-31

    IPC分类号: G11C29/00

    CPC分类号: G11C29/42

    摘要: A conversion control unit sets a converting function of a write data conversion unit or a read data conversion unit enabled or disabled for each controller. Accordingly, for a controller which needs original external data, the external data can be inputted and outputted, whereas for a controller which needs converted internal data, the internal data can be inputted and outputted. A data converting function of a conventional controller can be realized in a semiconductor memory, which can reduce the load on the controller. As a result, the performance of a system can be improved. A disabled controller which has no access right cannot read correct data (original data before conversion). Hence, the security of data written into the semiconductor memory can be protected.

    摘要翻译: 转换控制单元设置对每个控制器启用或禁用的写数据转换单元或读数据转换单元的转换功能。 因此,对于需要原始外部数据的控制器,可以输入和输出外部数据,而对于需要转换的内部数据的控制器,可以输入和输出内部数据。 可以在半导体存储器中实现传统控制器的数据转换功能,这可以减少控制器上的负载。 结果,可以提高系统的性能。 无权访问的无​​效控制器无法读取正确的数据(转换前的原始数据)。 因此,可以保护写入半导体存储器的数据的安全性。

    Optical transmission between devices on circuit board
    40.
    发明申请
    Optical transmission between devices on circuit board 审中-公开
    电路板上设备之间的光传输

    公开(公告)号:US20080008477A1

    公开(公告)日:2008-01-10

    申请号:US11812864

    申请日:2007-06-22

    申请人: Toshio Ogawa

    发明人: Toshio Ogawa

    IPC分类号: H04B10/00 G02B6/42

    摘要: A circuit board includes a substrate having a thickness in a first direction, extending in a plane perpendicular to the first direction, and having at least one of a through hole and a recess, and an optical transmission channel having an end thereof at a perimeter of the one of a through hole and a recess and having a portion thereof extending a predetermined distance from the end in a direction substantially perpendicular to the first direction, the portion being provided in the substrate or on a surface of the substrate.

    摘要翻译: 电路板包括具有在第一方向上的厚度的基板,在垂直于第一方向的平面中延伸,并且具有通孔和凹部中的至少一个,以及具有在其周边的末端的光传输通道 通孔和凹部中的一个,并且其一部分在基本上垂直于第一方向的方向上从端部延伸预定距离,该部分设置在基板中或基板的表面上。