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    • 3. 发明申请
    • HIGH-GAIN DIRECTIONAL TRANSDUCER ARRAY
    • 高增益方向转换器阵列
    • WO1997013241A1
    • 1997-04-10
    • PCT/US1996015271
    • 1996-09-20
    • LOCKHEED MARTIN CORPORATION
    • LOCKHEED MARTIN CORPORATIONKUHN, Philip, Moritz
    • G10K11/00
    • G10K11/008
    • A transducer array according to the invention includes forty-two acoustic transducers for use in a fluid medium, with each of the transducers having maximum lateral dimensions of less than one acoustic wavelength in the medium, whereby the transducers themselves tend to radiate isotropically. The elements of the array are located at the vertices of a regular geodesic two-frequency icosahedron. The transducer array also includes a driver or a receiver, or both, and arrangements for coupling them to the array elements. A switching circuit can couple the array elements alternately to the driver or receiver, depending upon the operating mode. A conventional delay controller is coupled to the acoustic transducers, for controlling an acoustic beam formed by the array. In a particular embodiment of the invention, the array is operated at frequencies selected so that the inter-transducer spacing of any two mutually adjacent transducers does not exceed 2 lambda /3, and is not less than lambda /3.
    • 根据本发明的换能器阵列包括用于流体介质的四十二个声换能器,其中每个换能器在介质中具有小于一个声波长的最大横向尺寸,由此换能器本身倾向于各向同性地辐射。 阵列的元素位于常规测地二次二值体的顶点。 换能器阵列还包括驱动器或接收器,或两者,以及用于将它们耦合到阵列元件的布置。 切换电路可以根据操作模式将阵列元件交替地耦合到驱动器或接收器。 传统的延迟控制器耦合到声换能器,用于控制由阵列形成的声束。 在本发明的特定实施例中,阵列以所选择的频率工作,使得任何两个相互相邻的换能器的换能器间距不超过2λ/ 3,并且不小于λ/ 3。
    • 4. 发明申请
    • SYSTEM AND METHOD FOR DIVERTING BOUNDARY LAYER AIR
    • 用于分散边界层空气的系统和方法
    • WO1997035105A1
    • 1997-09-25
    • PCT/US1997004438
    • 1997-03-19
    • LOCKHEED MARTIN CORPORATION
    • LOCKHEED MARTIN CORPORATIONHAMSTRA, Jeffrey, WilliamSYLVESTER, Thomas, Gerard
    • F02C07/042
    • B64C21/00B64C7/00B64D33/02B64D2033/026Y02T50/166Y10T137/0536
    • A diverterless engine inlet (10) system that integrates a "bump" (20) surface with a forward swept, aft-closing cowl (30) to divert substantially all of the boundary layer air from the inlet. The bump includes an isentropic compression surface raised outwardly from the body of the aircraft to form a portion of the inner surface of the inlet. The cowl couples to the body of the aircraft to form the remaining surfaces of the inlet and closes against the body of the aircraft at the aft-most points of the inlet opening. The bump and the cowl work together to divert low energy boundary layer air from the inlet during aircraft operation, thus eliminating the requirement for a boundary layer diverter. The diverterless inlet provides a lower cost, reduced complexity air induction system that can be used on a supersonic aircraft engine.
    • 将“凸起”(20)表面与向前扫掠的后关闭整流罩(30)集成以便从入口基本上转移所有边界层空气的无差压发动机入口(10)系统。 凸块包括从飞行器主体向外凸起的等熵压缩表面,以形成入口内表面的一部分。 整流罩耦合到飞行器的主体以形成入口的剩余表面,并在入口开口的最后部分处关闭飞机的主体。 碰撞和整流罩在飞行器运行期间一起工作,从入口转移低能量边界层空气,从而消除了对边界层分流器的要求。 无歧管进气口提供了更低成本,更低复杂度的空气感应系统,可用于超音速飞机发动机。
    • 8. 发明申请
    • AN AIR DATA SYSTEM
    • 空气数据系统
    • WO1996035927A1
    • 1996-11-14
    • PCT/US1996002277
    • 1996-02-28
    • LOCKHEED MARTIN CORPORATION
    • LOCKHEED MARTIN CORPORATIONLOSCHKE, Robert, C.
    • G01F13/00
    • G01P5/14
    • The invention is a system for determining the physical characteristics of an incident fluid flow stream over a surface of a vehicle relative to an axis thereof. In detail, the invention includes at least one first pressure sensor (22) mounted on the surface, the at least one first pressure sensor (22) for receiving dynamic pressure signals generated by the convected boundary layer of the fluid flow stream and providing an output signal representative thereof. At least one array (24) of second pressure sensors (24A-24I) is positioned downstream of the at least one first pressure sensor (22), the second sensors (24A-I) of the at least one array (24) each of said second pressure sensors (24A-I) providing a second output signal representative of the above pressure signals received thereby. A computer system (36) is adapted to receive the first and second signals and to calculate the angular direction of the fluid flow relative to the axis and the velocity thereof.
    • 本发明是一种用于确定车辆表面上相对于其轴线的入射流体流动流的物理特性的系统。 具体地,本发明包括安装在表面上的至少一个第一压力传感器(22),所述至少一个第一压力传感器(22)用于接收由流体流动流的对流边界层产生的动态压力信号,并提供输出 信号代表。 第二压力传感器(24A-24I)的至少一个阵列(24)位于所述至少一个第一压力传感器(22)的下游,所述至少一个阵列(24)的第二传感器(24A-1) 所述第二压力传感器(24A-I)提供表示由此接收的上述压力信号的第二输出信号。 计算机系统(36)适于接收第一和第二信号并且计算流体流相对于轴的角度方向及其速度。
    • 9. 发明申请
    • PARALLEL DATA PROCESSOR
    • 并行数据处理器
    • WO1996008778A1
    • 1996-03-21
    • PCT/US1994010332
    • 1994-09-13
    • LOCKHEED MARTIN CORPORATION
    • LOCKHEED MARTIN CORPORATIONMEEKER, Woodrow, L.
    • G06F15/80
    • G06F9/3885G06F9/3887G06F15/8023
    • A parallel processor has a controller for generating control signals, and a plurality of identical processing cells, each of which is connected to at least one neighboring cell and responsive to the controller for processing data in accordance with the control signals. Each processing cell includes a memory, a first register, a second register, and an arithmetic logic unit (ALU). An input of the first register is coupled to a memory output. The output of the first register is coupled to a second register located in a neighboring cell. An input of the second register is coupled to receive an output from a first register located in a neighboring cell. The output of the second register is coupled to an input of the ALU. In another feature, mask logic is interposed between A and B operand sources, and two inputs of the ALU. The mask logic also inputs a mask source and in response to control signals, can output the A operand logically OR'ed with the mask, and can output the B operand logically AND'ed with the mask. In another feature, each cell includes a multiplexor coupled to a neighboring cell for selectively transmitting cell data to the neighbor, or for effectively bypassing the cell during data shift operations by transmitting data that is received from a neighboring cell to a neighboring cell. Other enhancements to a cell architecture are also disclosed.
    • 并行处理器具有用于产生控制信号的控制器和多个相同的处理单元,每个处理单元连接到至少一个相邻单元,并响应控制器根据控制信号处理数据。 每个处理单元包括存储器,第一寄存器,第二寄存器和算术逻辑单元(ALU)。 第一寄存器的输入耦合到存储器输出。 第一寄存器的输出耦合到位于相邻单元中的第二寄存器。 第二寄存器的输入被耦合以从位于相邻小区中的第一寄存器接收输出。 第二寄存器的输出耦合到ALU的输入端。 在另一个特征中,屏蔽逻辑插在A和B操作数源之间,ALU的两个输入端。 掩码逻辑还输入掩码源,并响应于控制信号,可以将A操作数与掩码进行逻辑“或”运算,并可以将B操作数与掩码进行逻辑“和”运算。 在另一个特征中,每个小区包括耦合到相邻小区的多路复用器,用于选择性地将小区数据发送到邻居,或者通过将从相邻小区接收的数据发射到相邻小区来在数据移位操作期间有效地绕过小区。 还公开了细胞结构的其他增强。
    • 10. 发明申请
    • SYNCHRONIZATION OF TRANSMISSIONS FROM A SUBSCRIBER UNIT TO A BASE UNIT IN A RADIO CDMA COMMUNICATIONS SYSTEM
    • 无线射频通信系统中从订户单元传输到基站的传输同步
    • WO1997031429A1
    • 1997-08-28
    • PCT/US1997002654
    • 1997-02-14
    • LOCKHEED MARTIN CORPORATION
    • LOCKHEED MARTIN CORPORATIONKINGSTON, Samuel, C.GIALLORENZI, Thomas, R.STEAGALL, WilliamMATOLAK, David
    • H04B01/707
    • H04B1/7077H04B1/7103H04B2201/7071H04B2201/709709H04W92/10
    • Disclosed are methods and apparatus for use in a synchronous CDMA communications system (10) that employs orthogonal pn spreading codes. The methods are intended for synchronizing transmissions from a subscriber unit (SU 14) to a radio base unit (RBU 12), and include the steps of: (a) transmitting individual ones of a plurality of bursts from the SU to the RBU, each burst being transmitted with a different pn spreading code timing alignment; (b) receiving individual ones of the plurality of bursts with the RBU and determining a power estimate of each received burst; and (c) in response to a determined power estimate of one of the bursts exceeding a threshold, sending a message from the RBU to the SU. The message indicates that the SU is to use for subsequent transmissions the pn spreading code timing alignment that was employed when transmitting the burst that exceeded the threshold. In a preferred embodiment of this invention the step of transmitting transmits an indication of the pn spreading code timing alignment used when transmitting a given one of the bursts. Each burst is transmitted with a pn spreading code timing alignment that differs by 1/2 chip from a previous pn spreading code timing alignment.
    • 公开了在采用正交pn扩展码的同步CDMA通信系统(10)中使用的方法和装置。 这些方法用于同步来自用户单元(SU 14)到无线电基站单元(RBU 12)的传输,并且包括以下步骤:(a)将多个突发中的各个从SU发送到RBU,每个突发 以不同的pn扩频码定时对准发送突发; (b)用所述RBU接收所述多个突发中的各个突发并确定每个接收的突发的功率估计; 和(c)响应于超过阈值的突发之一的确定功率估计,将消息从RBU发送到SU。 消息指示SU用于后续传输,当发送超过阈值的突发时采用的pn扩展码定时对准。 在本发明的优选实施例中,发射步骤在发送给定的一个突发时发送使用的pn扩展码定时对准的指示。 每个脉冲串以pn扩展码定时对准发送,该pn扩展码定时对准与先前的pn扩展码定时对准相差1/2个码片。