Carbon nanotube underwater acoustic thermophone

    公开(公告)号:US09838803B1

    公开(公告)日:2017-12-05

    申请号:US15273817

    申请日:2016-09-23

    IPC分类号: G01S7/521 H04R23/00

    摘要: A carbon nanotube thermophone is provided. The thermophone includes high temperature rated shells as protective walls as the top and bottom housing of the thermophone with carbon nanotube sheets affixed between the shells. The shells act as acoustic windows that match the surrounding frequency and acoustic radiation medium. A high temperature rated sealant gasket is used to enclose the shells of the thermophone where gas holes are inserted for interior heavy gas filling. The acoustic resonant frequency is defined by the dimensions of the housing of the thermophone and the sound speed of the filled heavy gas. Each carbon nanotube sheet has an electrode at both ends. Multiple carbon nanotube sheets can electrically tune the impedance to match a driving amplifier impedance load.

    System and method for maintaining protocol status information in a network device
    14.
    发明授权
    System and method for maintaining protocol status information in a network device 有权
    用于在网络设备中维护协议状态信息的系统和方法

    公开(公告)号:US07343485B1

    公开(公告)日:2008-03-11

    申请号:US10654388

    申请日:2003-09-03

    IPC分类号: H04L9/00

    CPC分类号: H04L63/0254

    摘要: A method may involve: maintaining protocol status information for a network protocol, where the protocol status information includes protocol information generated by a protocol server and network traffic information indicative of how messages are conveyed from the protocol client to a network, and updating the protocol status information in response to intercepting a protocol message being conveyed between a protocol client and a protocol server. For example, the network protocol can be DHCP (Dynamic Host Configuration Protocol) and the protocol status information can be updated to include an IP (Internet Protocol) address assigned to the protocol client by the protocol server in the protocol message. Such a method may inhibit the misuse of one or more network protocols and/or attacks on protocol servers.

    摘要翻译: 一种方法可以包括:维护网络协议的协议状态信息,其中协议状态信息包括由协议服务器生成的协议信息和指示消息如何从协议客户端传送到网络的网络业务信息,以及更新协议状态 响应于拦截在协议客户端和协议服务器之间传送的协议消息的信息。 例如,网络协议可以是DHCP(动态主机配置协议),并且可以更新协议状态信息以包括由协议服务器在协议消息中分配给协议客户端的IP(因特网协议)地址。 这种方法可能会阻止对协议服务器的一个或多个网络协议和/或攻击的误用。

    Nonlinear techniques for pressure vector acoustic sensor array synthesis
    15.
    发明授权
    Nonlinear techniques for pressure vector acoustic sensor array synthesis 失效
    压力矢量声传感器阵列合成的非线性技术

    公开(公告)号:US07274622B1

    公开(公告)日:2007-09-25

    申请号:US11136764

    申请日:2005-05-23

    IPC分类号: G01S15/00

    CPC分类号: G01S3/8006

    摘要: The present invention presents a method for use with an acoustic sensor array comprised of a number of pressure-vector sensors capable of sensing the acoustic scalar field and acoustic vector field of an acoustic wave. The method is a signal processing technique that utilizes nonlinear processing of pressure-vector sensor signals in the acoustic sensor array. The method involves the steps of receiving the sensor output values, processing the output values using a non-linear algorithm to create a mathematical series of values, transforming the series, applying weighting to the series and performing a summation of the values in the series to calculate the array directivity response. The array directivity response can then be further processed where the array is part of a sonar system.

    摘要翻译: 本发明提供了一种与声传感器阵列一起使用的方法,所述声传感器阵列包括能够感测声波的声标量场和声矢场的多个压力矢量传感器。 该方法是利用声传感器阵列中的压力矢量传感器信号的非线性处理的信号处理技术。 该方法包括以下步骤:接收传感器输出值,使用非线性算法处理输出值以创建数学系列的值,变换系列,对系列应用加权并执行该系列中的值的求和 计算阵列方向性响应。 然后可以进一步处理阵列方向性响应,其中阵列是声纳系统的一部分。

    Underwater acoustic carbon nanotube thermophone

    公开(公告)号:US09838802B1

    公开(公告)日:2017-12-05

    申请号:US15273801

    申请日:2016-09-23

    IPC分类号: H04R23/00 G01S7/521

    摘要: A carbon nanotube thermophone is provided which includes a urethane frame having mounting holes at corners of the frame. Screw holes in the frame are provided for a cable holder. A square shaped carbon nanotube material chip is positioned within the urethane frame. The carbon nanotube material chip can comprise multiple carbon nanotube sheets to electrically tune the impedance to match a driving amplifier impedance load. Wooden spacers assist in positioning the carbon nanotube material chip. A first end of a cable is soldered to the carbon nanotube material chip at electrodes of the material chip. A high temperature rated silicon sealant is used for attachment points on the thermophone.

    Passive mode carbon nanotube underwater acoustic transducer

    公开(公告)号:US09781520B1

    公开(公告)日:2017-10-03

    申请号:US15270166

    申请日:2016-09-20

    申请人: Dehua Huang

    发明人: Dehua Huang

    IPC分类号: H04R23/00 H04R1/44 B82Y15/00

    摘要: A passive carbon nanotube transducer is provided. The passive carbon nanotube transducer includes shells as protective walls for the top and bottom housing of the transducer with carbon nanotube sheets affixed between the shells. The shells act as acoustic windows that match the surrounding acoustic medium. A gasket encloses the shells and carbon nanotube sheets of the transducer. Each carbon nanotube sheet has an electrode at both ends. Multiple carbon nanotube sheets are capable of sensing sound induced environment temperature deviations and converting electric voltage or current for passive acoustic detection.

    System and method for filtering network traffic
    19.
    发明授权
    System and method for filtering network traffic 有权
    过滤网络流量的系统和方法

    公开(公告)号:US08788823B1

    公开(公告)日:2014-07-22

    申请号:US10971523

    申请日:2004-10-22

    IPC分类号: H04L9/32

    CPC分类号: H04L63/10 H04L63/0263

    摘要: Protocol status information is used to perform traffic filtering by dropping messages that are not consistent with the protocol status information. In one embodiment, a method involves comparing message information and protocol status information. The message information is associated with a first message. The protocol status information is obtained in response to one or more second messages, which are conveyed according to a protocol used to assign network addresses to clients. The method also involves determining whether to discard the first message, based on an outcome of the comparison of the message information and the protocol status information. For example, it can be determined that the first message should be discarded, if the message information does not match the protocol status information.

    摘要翻译: 协议状态信息用于通过丢弃与协议状态信息不一致的消息来进行流量过滤。 在一个实施例中,一种方法包括比较消息信息和协议状态信息。 消息信息与第一消息相关联。 响应于根据用于向客户端分配网络地址的协议传送的一个或多个第二消息来获得协议状态信息。 该方法还包括基于消息信息和协议状态信息的比较的结果来确定是否丢弃第一消息。 例如,如果消息信息与协议状态信息不匹配,则可以确定第一消息应被丢弃。

    Acoustic multifunctional standard calibration method
    20.
    发明授权
    Acoustic multifunctional standard calibration method 失效
    声学多功能标准校准方法

    公开(公告)号:US08526270B1

    公开(公告)日:2013-09-03

    申请号:US13228643

    申请日:2011-09-09

    IPC分类号: H04B1/02 H04B17/00 G01S3/80

    CPC分类号: G01S7/52004 G01S3/82

    摘要: A method for using a deployable, small package acoustic transmitter device is taught, which serves as a standard acoustic source for on-vessel, in-mission field calibration purposes. The method involves deploying an acoustic transmitter device underwater to provide a predefined acoustic energy source for sonar array detection as well as periodic time-coded acoustic signal pulses for tracking and calibration of passive ranging.

    摘要翻译: 教导了一种使用可部署的小型封装声发射器装置的方法,该装置用作用于船上任务现场校准目的的标准声源。 该方法涉及在水下部署声发射器装置以提供用于声纳阵列检测的预定声能源,以及用于跟踪和校准被动测距的周期性时间编码声信号脉冲。