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    • 2. 发明申请
    • METHOD AND APPARATUS FOR SYNCHRONIZING DATA IN A UTILITY SYSTEM
    • 用于在实用系统中同步数据的方法和装置
    • WO2008140691A1
    • 2008-11-20
    • PCT/US2008/005634
    • 2008-05-02
    • SQUARE D COMPANYBICKEL, Jon, A.ASHBY, E., Avery
    • BICKEL, Jon, A.ASHBY, E., Avery
    • G01R22/06H04B3/54
    • H04B3/542G01D4/002H04B2203/5433H04B2203/5458H04B2203/5466H04B2203/5483Y02B90/241Y04S20/32Y04S20/36Y04S20/48
    • A time synchronization device (TSD) that produces a synchronization signal and couples it onto energized power conductors in a power monitoring system. Monitoring devices coupled to the TSD include frequency detection algorithms, such as a Goertzel filter, for detecting the synchronization signal and interpreting the information encoded in the signal. The frequency of the synchronization signal may correspond to the fourth or tenth harmonic component of the fundamental frequency of the voltage on the power conductors. The magnitude of the signal is selected to be above the expected or established noise floor of the power monitoring system plus a predetermined threshold. The duration of the signal can be varied, such as lasting a full cycle of the fundamental frequency. Multiple TSD signals received in a predetermined sequence may be converted into digital words that convey time, configuration, reset, control, or other information to the monitoring device.
    • 时间同步装置(TSD),其产生同步信号并将其耦合到功率监测系统中的通电电力导体上。 耦合到TSD的监控设备包括诸如Goertzel滤波器的频率检测算法,用于检测同步信号并解释在信号中编码的信息。 同步信号的频率可以对应于电力导体上的电压的基频的第四或第十谐波分量。 信号的幅度被选择为高于功率监视系统的预期或建立的噪声底限加上预定的阈值。 可以改变信号的持续时间,例如持续基频的整个周期。 以预定顺序接收的多个TSD信号可以被转换成将时间,配置,复位,控制或其他信息传送到监视设备的数字字。