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29 条记录 (耗时 0.033 秒)

    Method and system for network setup and maintenance and medium access control for a wireless sensor network
    21.
    发明授权
    Method and system for network setup and maintenance and medium access control for a wireless sensor network 有权
    用于无线传感器网络的网络建立和维护和媒体访问控制的方法和系统

    公开(公告)号：US08199635B2

    公开(公告)日：2012-06-12

    申请号：US12259213

    申请日：2008-10-27

    申请人： James Laurence Taylor ,  Venkatagopal Racherla ,  Jaya L. Jeyaseelan ,  Naiel K. Askar ,  Michael D. Perry ,  David S. Furuno

    发明人： James Laurence Taylor ,  Venkatagopal Racherla ,  Jaya L. Jeyaseelan ,  Naiel K. Askar ,  Michael D. Perry ,  David S. Furuno

    IPC分类号： G01R31/08

    CPC分类号： H04L67/12 ,  H04L67/025 ,  H04W40/24 ,  H04W84/18

    摘要： A sensor network having a first command center and a first access node, comprising a wireless transceiver, coupled to the command center. The sensor network may also include a plurality of nodes individually comprising a wireless transceiver and a directional antenna, wherein each of the plurality of nodes is successively located in a downlink direction relative to the first access node, and is configured to wirelessly communicate via the directional antenna with at least one node of a first neighbor group in a first direction and at least one node of a second neighbor group in a second direction. In addition, a sensor device is individually coupled to at least one of the nodes, and is configured to provide sensor data for the first command center.

    摘要翻译： 一种具有第一命令中心和第一接入节点的传感器网络，包括耦合到命令中心的无线收发器。 传感器网络还可以包括单独地包括无线收发器和定向天线的多个节点，其中多个节点中的每一个相对于第一接入节点连续地位于下行链路方向上，并被配置为经由定向无线通信 天线，其具有第一方向上的第一相邻组的至少一个节点和第二方向上的第二相邻组的至少一个节点。 另外，传感器设备单独地耦合到至少一个节点，并且被配置为提供用于第一命令中心的传感器数据。

    Tapered laser rods as a means of minimizing the path length of trapped barrel mode rays
    22.
    发明授权
    Tapered laser rods as a means of minimizing the path length of trapped barrel mode rays 失效
    锥形激光棒作为最小化被捕获的筒状模式射线的路径长度的手段

    公开(公告)号：US06937636B1

    公开(公告)日：2005-08-30

    申请号：US09651658

    申请日：2000-08-29

    申请人： Raymond J. Beach ,  Eric C. Honea ,  Stephen A. Payne ,  Ian Mercer ,  Michael D. Perry

    发明人： Raymond J. Beach ,  Eric C. Honea ,  Stephen A. Payne ,  Ian Mercer ,  Michael D. Perry

    IPC分类号： H01S3/06 ,  H01S3/0941

    CPC分类号： H01S3/0617 ,  H01S3/061 ,  H01S3/094057 ,  H01S3/09415

    摘要： By tapering the diameter of a flanged barrel laser rod over its length, the maximum trapped path length of a barrel mode can be dramatically reduced, thereby reducing the ability of the trapped spontaneous emission to negatively impact laser performance through amplified spontaneous emission (ASE). Laser rods with polished barrels and flanged end caps have found increasing application in diode array end-pumped laser systems. The polished barrel of the rod serves to confine diode array pump light within the rod. In systems utilizing an end-pumping geometry and such polished barrel laser rods, the pump light that is introduced into one or both ends of the laser rod, is ducted down the length of the rod via the total internal reflections (TIRs) that occur when the light strikes the rod's barrel. A disadvantage of using polished barrel laser rods is that such rods are very susceptible to barrel mode paths that can trap spontaneous emission over long path lengths. This trapped spontaneous emission can then be amplified through stimulated emission resulting in a situation where the stored energy available to the desired lasing mode is effectively depleted, which then negatively impacts the laser's performance, a result that is effectively reduced by introducing a taper onto the laser rod.

    摘要翻译： 通过锥形圆柱形激光棒在其长度上的直径逐渐减小，筒状模式的最大捕获路径长度可以大大降低，从而降低被捕获的自发发射通过放大的自发发射（ASE）对激光性能产生负面影响的能力。 具有抛光桶和法兰端盖的激光棒在二极管阵列端泵浦激光系统中的应用越来越多。 棒的抛光筒用于将二极管阵列泵浦光限制在杆内。 在使用端部泵送几何形状的系统和抛光的筒状激光棒的系统中，被引入到激光棒的一端或两端的泵浦光通过全部内部反射（TIR）向下延伸， 光线撞到杆的桶。 使用抛光桶形激光棒的缺点是这样的棒非常容易受到桶状模式路径的影响，可以在长路径长度上捕获自发发射。 然后可以通过受激发射来扩大被捕获的自发发射，从而导致可用于期望的激光模式的存储能量被有效耗尽的情况，其然后对激光器的性能产生不利影响，通过在激光器上引入锥形来有效地减少 竿。

    Programmable phase plate for tool modification in laser machining applications
    24.
    发明授权
    Programmable phase plate for tool modification in laser machining applications 失效
    可编程相位板用于激光加工应用中的刀具修改

    公开(公告)号：US06717104B2

    公开(公告)日：2004-04-06

    申请号：US10172458

    申请日：2002-06-13

    申请人： Charles A. Thompson, Jr. ,  Michael W. Kartz ,  James M. Brase ,  Deanna Pennington ,  Michael D. Perry

    发明人： Charles A. Thompson, Jr. ,  Michael W. Kartz ,  James M. Brase ,  Deanna Pennington ,  Michael D. Perry

    IPC分类号： B23K2606

    CPC分类号： B23K26/032 ,  B23K26/066 ,  B23K26/705

    摘要： A system for laser machining includes a laser source for propagating a laser beam toward a target location, and a spatial light modulator having individual controllable elements capable of modifying a phase profile of the laser beam to produce a corresponding irradiance pattern on the target location. The system also includes a controller operably connected to the spatial light modulator for controlling the individual controllable elements. By controlling the individual controllable elements, the phase profile of the laser beam may be modified into a desired phase profile so as to produce a corresponding desired irradiance pattern on the target location capable of performing a machining operation on the target location.

    摘要翻译： 用于激光加工的系统包括用于将激光束朝向目标位置传播的激光源，以及空间光调制器，其具有能够修改激光束的相位分布的各个可控元件，以在目标位置上产生对应的辐照度图案。 该系统还包括可操作地连接到空间光调制器以控制各个可控元件的控制器。 通过控制各个可控元件，激光束的相位轮廓可以被修改为期望的相位轮廓，以便在能够对目标位置执行加工操作的目标位置上产生相应的期望辐射图。

    Laser radiography forming bremsstrahlung radiation to image an object
    25.
    发明授权
    Laser radiography forming bremsstrahlung radiation to image an object 失效
    激光放射成像bre致辐射成像物体

    公开(公告)号：US06678351B1

    公开(公告)日：2004-01-13

    申请号：US09564957

    申请日：2000-05-04

    申请人： Michael D. Perry ,  Joseph A. Sefcik

    发明人： Michael D. Perry ,  Joseph A. Sefcik

    IPC分类号： G21G400

    CPC分类号： H05G2/00

    摘要： A method of imaging an object by generating laser pulses with a short-pulse, high-power laser. When the laser pulse strikes a conductive target, bremsstrahlung radiation is generated such that hard ballistic high-energy electrons are formed to penetrate an object. A detector on the opposite side of the object detects these electrons. Since laser pulses are used to form the hard x-rays, multiple pulses can be used to image an object in motion, such as an exploding or compressing object, by using time gated detectors. Furthermore, the laser pulses can be directed down different tubes using mirrors and filters so that each laser pulse will image a different portion of the object.

    摘要翻译： 通过用短脉冲大功率激光产生激光脉冲来对物体进行成像的方法。 当激光脉冲撞击导电靶时，产生bre致辐射，使得形成硬质弹性高能电子以穿透物体。 物体的另一侧的探测器检测这些电子。 由于使用激光脉冲来形成硬X射线，所以可以使用多个脉冲来通过使用时间选通检测器来对运动中的物体（例如爆炸或压缩物体）进行成像。 此外，可以使用反射镜和滤光器将激光脉冲引导到不同的管，使得每个激光脉冲将对对象的不同部分进行成像。

    Method and apparatus for increasing the material removal rate in laser machining
    26.
    发明授权
    Method and apparatus for increasing the material removal rate in laser machining 有权

    公开(公告)号：US06664498B2

    公开(公告)日：2003-12-16

    申请号：US10120731

    申请日：2002-04-10

    申请人： Andrew C. Forsman ,  Paul S. Banks ,  Michael D. Perry

    发明人： Andrew C. Forsman ,  Paul S. Banks ,  Michael D. Perry

    IPC分类号： B23K2600

    CPC分类号： B23K26/0676 ,  B23K26/0613 ,  B23K26/0622 ,  B23K26/0624

    摘要： Methods and apparatus for material modification using laser bursts including appropriately timed laser pulses to enhance material modification. In one implementation, a method for material modification comprises the steps of: providing bursts of laser pulses, wherein each burst comprises at least two laser pulses, wherein each laser pulse has a pulse duration within a range of between approximately 10 ps and 100 ns, wherein a time between each laser pulse of each burst is within a range of between approximately 5 ns and 5 &mgr;s; a time between successive bursts is greater than the time between each laser pulse comprising each burst; and directing the bursts upon a workpiece, wherein an intensity of a primary laser pulse of each burst exceeds a damage threshold of the workpiece.

    High-resolution imaging and target designation through clouds or smoke
    27.
    发明授权
    High-resolution imaging and target designation through clouds or smoke 失效

    公开(公告)号：US06515737B2

    公开(公告)日：2003-02-04

    申请号：US09754884

    申请日：2001-01-03

    申请人： Michael D. Perry

    发明人： Michael D. Perry

    IPC分类号： G01C308

    CPC分类号： F41G7/263 ,  G01S7/481 ,  G01S17/66

    摘要： A method and system of combining gated intensifiers and advances in solid-state, short-pulse laser technology, compact systems capable of producing high resolution (i.e., approximately less than 20 centimeters) optical images through a scattering medium such as dense clouds, fog, smoke, etc. may be achieved from air or ground based platforms. Laser target designation through a scattering medium is also enabled by utilizing a short pulse illumination laser and a relatively minor change to the detectors on laser guided munitions.

    Nitinol hookswitch actuator
    28.
    发明授权
    Nitinol hookswitch actuator 失效
    镍钛合金钩开关执行器

    公开(公告)号：US6009166A

    公开(公告)日：1999-12-28

    申请号：US916582

    申请日：1997-08-22

    申请人： Fred I. Polito ,  Robert V. Davies ,  Gerald W. Skulley ,  Michael D. Perry ,  Kevin A. Sawyer ,  Brett A. Herscher ,  Robert J. Bernardi

    发明人： Fred I. Polito ,  Robert V. Davies ,  Gerald W. Skulley ,  Michael D. Perry ,  Kevin A. Sawyer ,  Brett A. Herscher ,  Robert J. Bernardi

    IPC分类号： H04M1/08 ,  H04M1/60 ,  H04M1/654 ,  H04M1/725 ,  H04M1/00

    CPC分类号： H04M1/6033 ,  H04M1/08 ,  H04M1/725 ,  H04M1/72533 ,  H04M1/6545

    摘要： A hookswitch actuator including an activating mechanism which maintains the hookswitch circuit of a telephone in an "on hook" state when the activating mechanism is in a first position, or in an "off hook" state when the activating mechanism is in the second position. The movement of the activating mechanism between the two positions is accomplished through the use of a shape memory alloy mechanism. The shape memory alloy mechanism is coupled to the activating mechanism in such a way that heating or cooling of the shape memory alloy mechanism moves the activating mechanism between its two positions. Control of the heating and cooling of the shape memory alloy mechanism is effectuated by controlling the amount of electric current passing through it.

    摘要翻译： 一种钩开关致动器，包括启动机构，当致动机构处于第一位置时，或者处于“脱钩”状态时，当启动机构处于第二位置时，该启动机构将电话的钩开关电路保持在处于“挂机”状态。 激活机构在两个位置之间的移动通过使用形状记忆合金机构来实现。 形状记忆合金机构以激活机构的形式记录合金机构的加热或冷却将激活机构移动到其两个位置之间。 通过控制通过它的电流量来实现对形状记忆合金机构的加热和冷却的控制。