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    • 21. 发明申请
    • MODELING AND CALIBRATING A THREE-PORT TIME-DOMAIN REFLECTOMETRY SYSTEM
    • 建立和校准三端口时域反射测量系统
    • US20070152681A1
    • 2007-07-05
    • US11683269
    • 2007-03-07
    • Murat BelgeChristopher Cunningham
    • Murat BelgeChristopher Cunningham
    • G01R27/32
    • H04B3/46G01R27/32H04B3/493
    • A three-port TDR front end comprises numerous components. An exemplary three-port TDR front end is a DSL modem. Information-bearing TDR signals are distorted as they pass through these components. With a perfect model of the response of its front-end, a TDR system usually can compensate for the effects of its front-end. In reality, however, the electrical characteristics of each component vary from design-to-design, board-to-board, and slowly over time. The result is imperfect knowledge about the true response of the front-end, errors in the model of the front-end, and degraded TDR performance. At least for this reason it is important to precisely calibrate the response of the TDR front-end through the use of a TDR modeling system.
    • 三端口TDR前端包括许多组件。 示例性的三端口TDR前端是DSL调制解调器。 信息承载的TDR信号通过这些组件时会失真。 TDR系统具有前端响应的完美模式,通常可以弥补其前端的影响。 然而,实际上,每个组件的电气特性从设计到设计,板对板和随着时间的推移缓慢变化。 结果是对前端的真实响应,前端模型的错误以及TDR性能下降的不完全了解。 至少因此,通过使用TDR建模系统来精确校准TDR前端的响应很重要。
    • 24. 发明申请
    • MAINTENANCE DEVICE FOR FASTENERS
    • 紧固件维护装置
    • US20150239000A1
    • 2015-08-27
    • US14710003
    • 2015-05-12
    • Christopher Cunningham
    • Christopher CunninghamDavid Barnsdale
    • B05C9/10B05C9/04
    • B05B11/3001B05C9/04B05C9/10B63B23/64F16B33/00F16B33/008
    • There is provided in a preferred embodiment of the present invention a maintenance device having a lubricant reservoir attached to the upper end of a fixed body, and a dynamic body that is slidably engaged and disposed within the fixed body at the lower end thereof. Attached to the base of dynamic body is a trio of cleaning arms. A spring that is internally positioned between the dynamic body and the fixed body biases the dynamic body downward and the cleaning arms to a relaxed position. As the dynamic body retracts upon the application of force by a user, lubricant is released and pumped from the lubricant reservoir and each of the cleaning arms pivot and engage the side wall of the male connector.
    • 在本发明的优选实施例中提供了一种维护装置,其具有附接到固定体的上端的润滑剂储存器,以及动态体,其在其下端可滑动地接合并设置在固定体内。 附着在动物身体的基础上,是一个三重的清洁武器。 内部定位在动力体和固定体之间的弹簧将动态体向下偏压并将清洁臂偏向松弛位置。 随着使用者在施加力时动力体缩回,润滑剂从润滑剂储存器被释放并被泵送,并且每个清洁臂枢转并接合阳连接器的侧壁。
    • 26. 发明授权
    • Method and system for detecting non-linear devices
    • 用于检测非线性设备的方法和系统
    • US08559532B2
    • 2013-10-15
    • US12864526
    • 2009-01-26
    • Christopher Cunningham
    • Christopher Cunningham
    • H04B3/00H04L25/00
    • H04B3/21H04B3/46H04L1/20H04L27/2601H04M11/062
    • To assist with the detection of unfiltered device(s), a system observes how the received noise changes between two links as the transmit signal is changed. Harmful unfiltered nonlinear devices will generate significant noise that depends on the transmitted signals; therefore, this additional noise can be quantified to some extent by comparing the observed noise for two different transmit signals. The total noise can be determined from the SNR if the received signal is known. The received signal may be read directly in some non-standard systems, or it may be determined from the known transmit signal and channel attenuation, which is sometimes the case in standard-compliant links, but often with a relatively large error. To circumvent this problem, certain embodiments of this invention only consider the change in noise between two links with the same channel attenuation. This differential comparison makes it unnecessary to accurately know the channel attenuation.
    • 为了帮助检测未过滤的设备,系统观察发射信号改变时两个链路之间的接收噪声如何变化。 有害的未过滤非线性器件将产生依赖于传输信号的显着噪声; 因此,通过比较两个不同发射信号的观测噪声,可以在一定程度上量化这种附加噪声。 如果接收到的信号是已知的,则可以从SNR确定总噪声。 可以在一些非标准系统中直接读取所接收的信号,或者可以从已知的发射信号和信道衰减来确定,这在标准兼容链路中有时是这种情况,但是通常具有相对较大的误差。 为了避免这个问题,本发明的某些实施例仅考虑具有相同信道衰减的两个链路之间的噪声变化。 该差分比较使得无需准确地知道信道衰减。
    • 30. 发明授权
    • Maintenance device for fasteners
    • 紧固件维修装置
    • US09566600B2
    • 2017-02-14
    • US14710003
    • 2015-05-12
    • Christopher Cunningham
    • Christopher CunninghamDavid Barnsdale
    • B05C9/10B05C9/04F16B33/00B63B23/64
    • B05B11/3001B05C9/04B05C9/10B63B23/64F16B33/00F16B33/008
    • There is provided in a preferred embodiment of the present invention a maintenance device having a lubricant reservoir attached to the upper end of a fixed body, and a dynamic body that is slidably engaged and disposed within the fixed body at the lower end thereof. Attached to the base of dynamic body is a trio of cleaning arms. A spring that is internally positioned between the dynamic body and the fixed body biases the dynamic body downward and the cleaning arms to a relaxed position. As the dynamic body retracts upon the application of force by a user, lubricant is released and pumped from the lubricant reservoir and each of the cleaning arms pivot and engage the side wall of the male connector.
    • 在本发明的优选实施例中提供了一种维护装置,其具有附接到固定体的上端的润滑剂储存器,以及在其下端可滑动地接合并设置在固定体内的动力体。 附着在动物身体的基础上,是一个三重的清洁武器。 内部定位在动力体和固定体之间的弹簧将动态体向下偏压并将清洁臂偏向松弛位置。 随着使用者在施加力时动力体缩回,润滑剂从润滑剂储存器被释放并被泵送,并且每个清洁臂枢转并接合阳连接器的侧壁。