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    • 3. 发明授权
    • Testing upstream cable channels
    • 测试上游有线频道
    • US08310940B2
    • 2012-11-13
    • US12793643
    • 2010-06-03
    • Richard Earl JonesChing-Chang LiaoDaniel K. Chappell
    • Richard Earl JonesChing-Chang LiaoDaniel K. Chappell
    • H04L12/28H04B3/46H04N7/173H04N17/00
    • H04L12/2801H04L43/50
    • In order to measure the performance of a DOCSIS upstream channel as well as to locate impairments, a special test signal is transmitted in a time slot of the upstream channel by a test instrument positioned anywhere within the CATV plant. A second test instrument, located at the termination point of the upstream plant, then detects, recovers, and processes the test signal in order to complete the measurement. The typical methods used to detect and recover bursted signals within a DOCSIS upstream channel use precise timing information transmitted in a corresponding DOCSIS downstream channel. Unfortunately, the downstream channel and thus the precise timing information are not always available to the secondary test instrument. The present invention also describes an apparatus and method for detecting a bursted test signal without the use of the DOCSIS upstream channel timing.
    • 为了测量DOCSIS上行信道的性能以及定位损伤,通过位于CATV工厂内任何地方的测试仪器,在上游信道的时隙中发送特殊测试信号。 位于上游工厂终端的第二个测试仪器,然后检测,恢复和处理测试信号,以完成测量。 用于检测和恢复DOCSIS上行信道中的突发信号的典型方法使用在相应DOCSIS下行信道中发送的精确定时信息。 不幸的是,下游通道和精确的定时信息并不总是适用于二次测试仪器。 本发明还描述了一种用于在不使用DOCSIS上行信道定时的情况下检测突发测试信号的装置和方法。
    • 6. 发明授权
    • Identifying an origin of a DOCSIS upstream burst
    • 识别DOCSIS上游突发的起源
    • US08427974B2
    • 2013-04-23
    • US12910595
    • 2010-10-22
    • Ching-Chang Liao
    • Ching-Chang Liao
    • H04L12/26
    • H04L12/2801
    • A method and an apparatus for identifying an origin of captured DOCSIS upstream bursts are disclosed. Upstream bursts are captured without knowing their allocated time slots in advance. Information from an upstream channel descriptor is used to generate RF waveforms of upstream burst preambles, which are then correlated to the captured upstream waveforms to determine the type of captured upstream bursts without having to decode the latter. Once the type of the captured upstream bursts is determined, information from the upstream channel descriptor is further used to demodulate and decode the upstream burst, so that CPE MAC addresses can be extracted. From the extracted CPE MAC addresses, the origin of the captured upstream bursts can be identified. The identification of origins of captured upstream bursts assists in locating faults in the cable network.
    • 公开了用于识别所捕获的DOCSIS上游脉冲串的原点的方法和装置。 在事先知道其分配的时隙的情况下捕获上行突发。 来自上行信道描述符的信息用于产生上行脉冲串前导码的RF波形,然后其与所捕获的上行波形相关,以确定所捕获的上行脉冲串的类型,而不必解码后者。 一旦捕获的上行脉冲串的类型被确定,来自上行信道描述符的信息被进一步用于对上行脉冲串进行解调和解码,从而可以提取CPE MAC地址。 从提取的CPE MAC地址中,可以识别所捕获的上行脉冲串的来源。 识别捕获的上游突发的起源有助于定位电缆网络中的故障。
    • 7. 发明授权
    • Safety apparatus in connection with work loading device to safe guard machine tools operation
    • 安全装置与工作装载装置相连,用于保护机床的操作
    • US07335840B2
    • 2008-02-26
    • US11124072
    • 2005-05-09
    • Hong-Tsu YoungChing-Chang LiaoMing-Shiue Jiang
    • Hong-Tsu YoungChing-Chang LiaoMing-Shiue Jiang
    • H01H9/20
    • H01H3/022H01H13/183
    • This invention is an installation of a safety apparatus to prevent safety problems of machine tools caused in work-loading process. The safety apparatus comprises an actuator, used for connecting circuits of the machine tool to control its power on-off status, and a storing unit to ensure the chuck wrench resting at a designated safe position. This safety system will activate the actuator when the chuck wrench is returned to the designated position and, therefore, it will keep the circuits of the machine tool stay active during the machining operation. On the other hand, this safety apparatus will remain in power-off status if the chuck wrench is not placed at the designated position and, therefore, it will make the power circuits open and paralyze the machine tool operation.
    • 本发明是一种安全装置,用于防止在加载过程中引起机床的安全问题。 安全装置包括用于连接机床的电路以控制其电源开关状态的致动器,以及用于确保卡盘扳手放置在指定的安全位置的存储单元。 当卡盘扳手返回到指定位置时,该安全系统将启动执行器,因此在加工操作期间将保持机床的回路保持活动状态。 另一方面,如果卡盘扳手没有放置在指定位置,则该安全装置将保持断电状态,因此将使电源电路打开并使机床操作瘫痪。
    • 9. 发明申请
    • IDENTIFYING AN ORIGIN OF A DOCSIS UPSTREAM BURST
    • 识别DOCSIS UPSTREAM BURST的原产地
    • US20110096684A1
    • 2011-04-28
    • US12910595
    • 2010-10-22
    • Ching-Chang Liao
    • Ching-Chang Liao
    • H04L12/26
    • H04L12/2801
    • A method and an apparatus for identifying an origin of captured DOCSIS upstream bursts are disclosed. Upstream bursts are captured without knowing their allocated time slots in advance. Information from an upstream channel descriptor is used to generate RF waveforms of upstream burst preambles, which arc then correlated to the captured upstream waveforms to determine the type of captured upstream bursts without having to decode the latter. Once the type of the captured upstream bursts is determined, information from the upstream channel descriptor is further used to demodulate and decode the upstream burst, so that CPE MAC addresses can be extracted. From the extracted CPE MAC addresses, the origin of the captured upstream bursts can be identified. The identification of origins of captured upstream bursts assists in locating faults in the cable network.
    • 公开了用于识别所捕获的DOCSIS上游脉冲串的原点的方法和装置。 在事先知道其分配的时隙的情况下捕获上行突发。 来自上行信道描述符的信息用于产生上行突发前同步码的RF波形,该波形然后与所捕获的上行波形相关,以确定所捕获的上行脉冲串的类型,而不必解码后者。 一旦捕获的上行脉冲串的类型被确定,来自上行信道描述符的信息被进一步用于对上行脉冲串进行解调和解码,从而可以提取CPE MAC地址。 从提取的CPE MAC地址中,可以识别所捕获的上行脉冲串的来源。 识别捕获的上游突发的起源有助于定位电缆网络中的故障。
    • 10. 发明申请
    • TESTING UPSTREAM CABLE CHANNELS
    • 测试UPSTREAM电缆通道
    • US20100309805A1
    • 2010-12-09
    • US12793643
    • 2010-06-03
    • Richard Earl JONES, JR.Ching-Chang LiaoDaniel K. Chappell
    • Richard Earl JONES, JR.Ching-Chang LiaoDaniel K. Chappell
    • H04L12/26
    • H04L12/2801H04L43/50
    • In order to measure the performance of a DOCSIS upstream channel as well as to locate impairments, a special test signal is transmitted in a time slot of the upstream channel by a test instrument positioned anywhere within the CATV plant. A second test instrument, located at the termination point of the upstream plant, then detects, recovers, and processes the test signal in order to complete the measurement. The typical methods used to detect and recover bursted signals within a DOCSIS upstream channel use precise timing information transmitted in a corresponding DOCSIS downstream channel. Unfortunately, the downstream channel and thus the precise timing information are not always available to the secondary test instrument. The present invention also describes an apparatus and method for detecting a bursted test signal without the use of the DOCSIS upstream channel timing.
    • 为了测量DOCSIS上行信道的性能以及定位损伤,通过位于CATV工厂内任何地方的测试仪器,在上游信道的时隙中发送特殊测试信号。 位于上游工厂终端的第二个测试仪器,然后检测,恢复和处理测试信号,以完成测量。 用于检测和恢复DOCSIS上行信道中的突发信号的典型方法使用在相应DOCSIS下行信道中发送的精确定时信息。 不幸的是,下游通道和精确的定时信息并不总是适用于二次测试仪器。 本发明还描述了一种用于在不使用DOCSIS上行信道定时的情况下检测突发测试信号的装置和方法。