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    • 7. 发明申请
    • VIBRATION REDUCTION
    • 降低振动
    • WO1994004844A1
    • 1994-03-03
    • PCT/GB1993001673
    • 1993-08-06
    • THE SECRETARY OF STATE FOR DEFENCE IN HER ...LEUNG, Rinnie, ChiHARPER, Mark, Francis, Lucien
    • THE SECRETARY OF STATE FOR DEFENCE IN HER ...
    • F16F15/00
    • B64G1/38F16F15/02F16F2224/0258F16L55/041
    • A cross axis actuator (1.1) for reducing the transmission of vibration along elongate members (1.2) comprising a series of windings (1.5, 1.6, 1.7, 1.8, 1.9, 1.10) wound helically at 30 pitch around the member (1.2) along part of its length in clockwise and anti-clockwise fashion and are anchored at two or more points (1.3, 1.4) to the member (1.2), the windings (1.5, 1.6, 1.7, 1.8, 1.9, 1.10) being able to be subjected to strain which causes deformation of the member (1.2) between attachment points (1.3, 1.4). The member (1.2) can be either a steel pipe or a rod. The windings (1.5, 1.6, 1.7, 1.8, 1.9, 1.10) can either be in the form of steel wires or be strips of material. The numbers of windings (1.5, 1.6, 1.7, 1.8, 1.9, 1.10) wound around the member (1.2) in a clockwise and anti-clockwise direction should be equal. Ideally, the windings (1.5, 1.6, 1.7, 1.8, 1.9, 1.10) are attached to the member (2) on a continuous basis except for the ends which are left free. The strain is generated from actuators, preferably made from piezo electric materials, which can either be attached to the ends of the windings (1.5, 1.6, 1.7, 1.8, 1.9, 1.10) or form part of the windings (1.5, 1.6, 1.7, 1.8, 1.9, 1.10). The actuators can be controlled by control signals which are calculated by a control unit based on signals produced by vibration sensors (1.13, 1.14). Ideally, part of the member (1.2) is formed to produce an impedance mismatch with the rest of the member (1.2). This can be achieved by having a flexible section (1.2a) within the member (1.2). The windings (1.5, 1.6, 1.7, 1.8, 1.9, 1.10) are usually attached across this section (1.2a).
    • 一种横轴致动器(1.1),用于减小沿着细长构件(1.2)的振动传播,包括沿着部件(1.2)以部件(1.2)螺旋形地绕30度的一系列绕组(1.5,1.6,1.7,1.8,1.9,1.10) 其长度为顺时针和逆时针方式,并且在两个或更多点(1.3,1.4)锚固到构件(1.2),绕组(1.5,1.6,1.7,1.8,1.9,1.10)能够承受 以引起连接点(1.3,1.4)之间的构件(1.2)变形的应变。 构件(1.2)可以是钢管或杆。 绕组(1.5,1.6,1.7,1.8,1.9,1.10)可以是钢丝的形式,也可以是材料条。 在顺时针和逆时针方向缠绕在构件(1.2)上的绕组数(1.5,1.6,1.7,1.8,1.9,1.10)应当相等。 理想的情况是绕组(1.5,1.6,1.7,1.8,1.9,1.10)连续地连接到构件(2)上,除了剩余的端部。 该应变由优选由压电材料制成的致动器产生,其可以附接到绕组的端部(1.5,1.6,1.7,1.8,1.9,1.10)或形成绕组的一部分(1.5,1.6,1.7 ,1.8,1.9,1.10)。 执行器可以由控制单元根据由振动传感器(1.13,1.14)产生的信号计算出的控制信号进行控制。 理想地,构件(1.2)的一部分被形成以产生与构件(1.2)的其余部分的阻抗失配。 这可以通过在构件(1.2)内具有柔性部分(1.2a)来实现。 绕组(1.5,1.6,1.7,1.8,1.9,1.10)通常连接在该部分(1.2a)上。
    • 8. 发明申请
    • WAVEGUIDE STAR COUPLER USING MULTIMODE INTERFERENCE
    • 波形星形耦合器使用多模式干扰
    • WO1993025923A1
    • 1993-12-23
    • PCT/GB1993001005
    • 1993-05-17
    • THE SECRETARY OF STATE FOR DEFENCE IN HER ...JENKINS, Richard, Michael
    • THE SECRETARY OF STATE FOR DEFENCE IN HER ...
    • G02B06/12
    • G02B6/2817G02B6/2813
    • A radiation coupling device (10) incorporates a rectangular multimode beamsplitter waveguide (20) connected at one end to a set of input waveguides (18). The input waveguides (18) have inserted within them respective fibre optic waveguides (22). The input waveguides (18) are connected at periodic positions across the beamsplitter waveguide's transverse cross section. The beamsplitter waveguide (20) is also connected at its other end to retroreflecting mirror (24). Radiation propagating in fundamental mode in any one of the input waveguides (18) passes along the beamsplitter waveguide (20) and is retroreflected at the mirror (24). On return, it becomes divided between the input waveguides (18) by virtue of modal dispersion (multimode interference) in the beamsplitter waveguide (20). The device (10) therefore acts as a star coupler.
    • 辐射耦合装置(10)包括在一端连接到一组输入波导(18)的矩形多模分束器波导(20)。 输入波导(18)在其内插入相应的光纤波导(22)。 输入波导(18)在分束器波导的横截面上的周期性位置连接。 分束器波导(20)的另一端也连接到回射反射镜(24)。 在任何一个输入波导(18)中以基本模式传播的辐射沿分束器波导(20)通过并在反射镜(24)处回射。 在返回时,它通过分束器波导(20)中的模式色散(多模干扰)在输入波导(18)之间分割。 因此,装置(10)用作星形耦合器。
    • 10. 发明申请
    • A DIGITAL BEAMFORMING ARRAY
    • 数字波束形成阵列
    • WO1993012440A1
    • 1993-06-24
    • PCT/GB1992002317
    • 1992-12-14
    • THE SECRETARY OF STATE FOR DEFENCE IN HER ...DEAN, Michael
    • THE SECRETARY OF STATE FOR DEFENCE IN HER ...
    • G01S13/87
    • H01Q3/26G01S13/48G01S13/87
    • A digital beamforming array for use in radar applications and particularly in radar applications that used phased array technology. The array receives an incoming signal at a plurality of sensor modules, converts them to intermediate frequency, and then converts the intermediate frequency signals to n-bit (preferably 1-bit) digital signals at an oversampling rate, where n is less than the number of bits required to represent the dynamic range of the intermediate frequency signal. The n-bit digital signals are then beamformed by altering their relative phases and combining them to form a resultant n-bit digital signal which is then converted to a digital signal of the number of bits required to represent the dynamic range of the intermediate frequency signal. An advantage of the present invention is that it reduces the complexity and thus the cost of the digitising hardware required.
    • 用于雷达应用的数字波束成形阵列,特别是在使用相控阵技术的雷达应用中。 阵列在多个传感器模块处接收输入信号,将其转换为中频,然后以过采样率将中频信号转换为n位(优选1位)数字信号,其中n小于数字 表示中频信号的动态范围所需的位。 然后通过改变它们的相对相位来对n位数字信号进行波束形成,并将其组合以形成合成的n位数字信号,然后将其转换为表示中频信号的动态范围所需的位数的数字信号 。 本发明的优点在于它降低了所需的数字化硬件的复杂度并因此降低了其成本。