Band-gap tunable elastic optical multilayer fibers

    公开(公告)号:US10146007B2

    公开(公告)日:2018-12-04

    申请号:US14760306

    申请日:2014-01-23

    Abstract: The rolled photonic fibers presents two codependent, technologically exploitable features for light and color manipulation: regularity on the nanoscale that is superposed with microscale cylindrical symmetry, resulting in wavelength selective scattering of light in a wide range of directions. The bio-inspired photonic fibers combine the spectral filtering capabilities and color brilliance of a planar Bragg stack compounded with a large angular scattering range introduced by the microscale curvature, which also decreases the strong directional chromaticity variation usually associated with flat multilayer reflectors. Transparent and elastic synthetic materials equip the multilayer interference fibers with high reflectance that is dynamically tuned by longitudinal mechanical strain. A two-fold elongation of the elastic fibers results in a shift of reflection peak center wavelength of over 200 nm.

    Doped graphene
    14.
    发明授权

    公开(公告)号:US10053772B2

    公开(公告)日:2018-08-21

    申请号:US15026437

    申请日:2014-09-26

    Abstract: Methods of producing a uniformly or substantially uniformly doped relatively large area multi-layered graphene element are described comprising the steps of placing the graphene element and a dopant under low pressure conditions, and holding the graphene element and dopant at an elevated temperature for a period of time while under the low pressure conditions. In one arrangement, openings are formed in a multi-layered graphene element of relatively large area prior to doping. In another arrangement, a relatively large area multi-layered graphene element formed by an epitaxial growth technique is used. The invention also relates to an element produced using the aforementioned techniques.

    DEVICES, SYSTEMS AND METHODS OF DETECTING DEFECTS IN WORKPIECES
    18.
    发明申请
    DEVICES, SYSTEMS AND METHODS OF DETECTING DEFECTS IN WORKPIECES 审中-公开
    检测工作缺陷的设备,系统和方法

    公开(公告)号:US20140311244A1

    公开(公告)日:2014-10-23

    申请号:US14319342

    申请日:2014-06-30

    Abstract: Device and method for detecting a defect in a workpiece with a broadband transducer (10), a driving circuit connected to the transducer to operate the transducer in a actuator mode, a signal output circuit connectable to operate in a sensor mode, a control for selectively connecting the transducer to the driving circuit or signal output circuit wherein the driving circuit includes at least a pair of oscillators for generating signals of at least frequencies F1 and F2 and a summer for summing the signals to provide a driving circuit for the transducer.

    Abstract translation: 用于使用宽带传感器(10)检测工件中的缺陷的装置和方法,连接到换能器以在致动器模式下操作换能器的驱动电路,可连接以传感器模式操作的信号输出电路,用于选择性地 将所述换能器连接到所述驱动电路或信号输出电路,其中所述驱动电路至少包括一对用于产生至少频率F1和F2的信号的振荡器,以及用于对所述信号求和以提供所述换能器的驱动电路的加法器。

    BRAKE PAD UNIT AND A METHOD OF MANUFACTURE OF A BRAKE PAD UNIT

    公开(公告)号:US20240288042A1

    公开(公告)日:2024-08-29

    申请号:US18573768

    申请日:2022-06-29

    Abstract: A brake pad unit for a disc brake assembly. The brake pad unit comprises a backing plate and a friction pad. The backing plate comprises a first side and a second side having a length L, a width W, and an edge wall which defines a thickness T of the backing plate. The first side defines an engagement surface for engaging with the disc brake assembly. The second side defines a friction material mounting surface. The backing plate is formed from a composite material comprising reinforcement fibres, wherein the composite material extends throughout of the backing plate. The backing plate comprises a layer of reinforcement fibres which are provided as continuous fibres which extend from a first point on the edge wall to a second point on the edge wall. The friction pad comprises a friction material provided on the friction material mounting surface of the backing plate.

    ENERGY HARVESTING ARRANGEMENT AND IMPROVEMENTS IN AND RELATING TO POWER MANAGEMENT

    公开(公告)号:US20240079973A1

    公开(公告)日:2024-03-07

    申请号:US18262446

    申请日:2022-02-11

    CPC classification number: H02N2/186 H02N2/181

    Abstract: An energy harvesting device is described comprising a piezoelectric material element (22), a proof mass (18) moveable relative to the piezoelectric material element (22) and coupled to the piezoelectric material element (22) by a coupling arrangement such that movement of the proof mass (18) causes compression of the piezoelectric material element (22), wherein the proof mass (18) defines a cavity (20), the piezoelectric material element (22) being located, at least in part, within the cavity (20). A power management circuit (50) suitable for use therewith is also described, the circuit (50) comprising a configurable voltage amplification and rectification circuit and a mode control circuit operable to configure the configurable circuit to operate in a voltage amplification mode or in a rectification mode, the mode control circuit selecting the operating mode depending upon the input or output of the configurable circuit.

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