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    • 84. 发明授权
    • Determining presence of radio frequency communication device
    • 确定射频通信设备的存在
    • US08050668B2
    • 2011-11-01
    • US12485789
    • 2009-06-16
    • Robert W. Twitchell, Jr.
    • Robert W. Twitchell, Jr.
    • H04M3/00
    • G06Q10/08G01S13/825H04W84/18Y02D70/10
    • A RF data communication device operates in at least two states. In a first state, the device transmits a response to an RF transmission if specific data therein represents an inquiry as to the presence of one or more RF data communication devices and if specific data therein corresponds to a class maintained by the device. The device does not transmit a response if specific data in the RF transmission is not representative of an inquiry as to the presence of one or more RF data communication devices, or if specific data therein does not correspond to at least one maintained class. In a second state, the device does not transmit a response when specific data is included therein that is representative of an inquiry as to the presence of one or more RF data communication devices and specific data therein corresponds to at least one maintained class.
    • RF数据通信设备在至少两个状态下工作。 在第一状态下,如果其中的特定数据表示关于一个或多个RF数据通信设备的存在的查询以及其中的特定数据是否对应于由该设备维护的类别,则设备向RF传输发送响应。 如果RF传输中的特定数据不代表关于一个或多个RF数据通信设备的存在的询问,或者其中的特定数据不对应于至少一个维护的类别,则该设备不发送响应。 在第二状态下,当特定数据被包含在其中时,该设备不发送响应,该特定数据表示关于一个或多个RF数据通信设备的存在的询问,并且其中的特定数据对应于至少一个维护的类。
    • 86. 发明授权
    • Using GPS and ranging to determine relative elevation of an asset
    • 使用GPS和测距来确定资产的相对高程
    • US07742773B2
    • 2010-06-22
    • US11555173
    • 2006-10-31
    • Robert W. Twitchell, Jr.
    • Robert W. Twitchell, Jr.
    • H04W24/00
    • G01S19/17G01C21/206G01S11/06G01S19/25G01S19/34G01S19/48G01S19/51Y02D70/10
    • A system and method are disclosed for determining a position of a wireless communication device. A method includes determining a respective (x,y) position of two wireless communication devices, determining a distance between the two wireless communication devices, and determining a relative elevational differential between the two wireless communication devices. The relative elevational differential is determined based on the determined (x,y) positions of the two wireless communication devices and the determined distance between the first and second wireless communication devices. The (x,y) positions may be determined using GPS receivers incorporated in the wireless communication devices. Determining the distance between the devices may be accomplished using RF ranging. The relative elevational differential may be derived using the Pythagorean theorem.
    • 公开了一种用于确定无线通信设备的位置的系统和方法。 一种方法包括确定两个无线通信设备的相应(x,y)位置,确定两个无线通信设备之间的距离,以及确定两个无线通信设备之间的相对高程差。 基于两个无线通信设备的确定的(x,y)位置和所确定的第一和第二无线通信设备之间的距离确定相对高差。 可以使用结合在无线通信设备中的GPS接收机来确定(x,y)位置。 确定设备之间的距离可以使用RF测距来实现。 相对高程差可以使用毕达哥拉斯定理得出。
    • 88. 发明授权
    • Sensor networks for monitoring pipelines and power lines
    • 用于监测管道和电力线路的传感器网络
    • US07705747B2
    • 2010-04-27
    • US11465796
    • 2006-08-18
    • Robert W. Twitchell, Jr.
    • Robert W. Twitchell, Jr.
    • G08C17/00
    • G08B25/009F17D5/06
    • A sensor network for monitoring utility power lines comprises a sensor disposed for monitoring utility power lines, the sensor capable of acquiring data related to the utility power lines and communicating sensor data; a first remote sensor interface (RSI) comprising a data communications device capable of receiving the sensor data communicated from the sensor, and transmitting data relating to the received sensor data; and a data communications device capable of receiving the data transmitted by the first RSI and transmitting data related to the sensor data directly or indirectly to a network external to the sensor network. The sensor network comprises a common designation network.
    • 一种用于监控公用电力线路的传感器网络,包括一个传感器,用于监控公用事业电力线路,该传感器能够获取与公用电力线路有关的数据并传送传感器数据; 第一远程传感器接口(RSI),包括能够接收从传感器传送的传感器数据的数据通信设备,以及发送与所接收的传感器数据有关的数据; 以及能够接收由第一RSI发送的数据并且将与传感器数据相关的数据直接或间接传送到传感器网络外部的网络的数据通信设备。 传感器网络包括公共指定网络。
    • 89. 发明授权
    • Selective GPS denial system
    • 选择性GPS拒绝系统
    • US07574168B2
    • 2009-08-11
    • US11424849
    • 2006-06-16
    • Robert W. Twitchell, Jr.Delia J. Smith
    • Robert W. Twitchell, Jr.Delia J. Smith
    • H04K3/00
    • H04K3/90G01S19/03G01S19/21H04K3/28H04K3/45H04K2203/18H04K2203/34H04W84/18H04W88/16
    • A selective GPS denial system includes a plurality of GPS deniers for disrupting reliable operation of GPS receivers, a plurality of remote sensor interfaces, a gateway, and a computer management system. Each of the plurality of GPS deniers may be selectively activated. Each remote sensor interface is associated with a respective GPS denier such that each remote sensor interface effectuates the activation of the respective GPS denier. The plurality of remote sensor interfaces and the gateway are communication nodes in an ad hoc wireless network. The gateway communicates instructions to one or more of the plurality of remote sensor interfaces to selectively activate the GPS denier respectively associated therewith. The computer management system is disposed in communication with the gateway and controls the instructions communicated by the gateway, thereby selectively controlling which GPS deniers are activated.
    • 选择性GPS拒绝系统包括用于中断GPS接收机,多个远程传感器接口,网关和计算机管理系统的可靠操作的多个GPS信号。 可以选择性地激活多个GPS旦数中的每一个。 每个远程传感器接口与相应的GPS旦数相关联,使得每个远程传感器接口实现相应的GPS旦数的激活。 多个远程传感器接口和网关是自组织无线网络中的通信节点。 网关将指令传送到多个远程传感器接口中的一个或多个,以选择性地启动与其相关联的GPS信号。 计算机管理系统被设置为与网关通信,并且控制由网关传送的指令,从而选择性地控制哪些GPS旦数被激活。
    • 90. 发明授权
    • All weather housing assembly for electronic components
    • 电子元件的所有天气住宅组件
    • US07563991B2
    • 2009-07-21
    • US11423127
    • 2006-06-08
    • Robert W. Twitchell, Jr.Richard A. Clark
    • Robert W. Twitchell, Jr.Richard A. Clark
    • H01R13/502H01L23/02H05K5/06
    • H05K5/0004Y02D70/10Y10T29/49117Y10T29/4973Y10T29/49817
    • An all weather housing assembly for protection of electrical components includes a first housing having an open end and defining a first compartment for receipt therein of electronic components; a cover attached to the first housing for enclosing the first compartment, the cover further including a mounting structure for receiving and retaining a power source which structure is mounted on a side of the cover that is exterior to the enclosed first compartment; and a second housing having an open end and defining a second compartment that is dimensioned to cover and protect a power source when received and retained by the mounting structure of the cover, the second housing being connected to the first housing independent of the attachment of the cover to the first housing.
    • 用于保护电气部件的全天候外壳组件包括具有开口端并限定用于在其中接收电子部件的第一隔室的第一壳体; 盖子,其附接到所述第一壳体以封闭所述第一隔室,所述盖子还包括用于接收和保持电源的安装结构,所述电源安装在所述封盖的封闭的第一隔间外部的一侧; 以及第二壳体,其具有开口端并且限定第二隔室,其尺寸被设计成在由盖的安装结构接收和保持时覆盖和保护电源,所述第二壳体与第一壳体的连接无关, 覆盖到第一个房屋。