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    • 4. 发明申请
    • METHOD AND DEVICE FOR COMBINED ANALOGUE AND DIGITAL TRANSMISSION OF AN ANALOGUE AC MEASURING SIGNAL BY MEANS OF AN OPTICAL FIBRE
    • 对于联合和模拟数字传输模拟交流测量信号的方法和设备的光纤的方式
    • WO1998018223A1
    • 1998-04-30
    • PCT/DE1997002305
    • 1997-10-08
    • SIEMENS AKTIENGESELLSCHAFTGROSS, WalterHAIN, StefanUNTERLASS, Franz-Josef
    • SIEMENS AKTIENGESELLSCHAFT
    • H04B10/152
    • H04J7/00
    • The invention relates to a method for combined analogue and digital transmission of an analogue AC measuring signal (Sa) by means of an optical fibre, and to a device to carry out this method. According to the invention the analogue AC measuring signal (Sa) is both digitized and combined with a constant direct voltage signal (SR), the digitized AC measuring signal (Sd) and the analog summated signal (SRa) are combined to form a modulation signal and converted to an optical transmission signal (SL), the optical transmission signal is reconverted into a modulation signal in the receiver (6), where the signals (Sa, Sd,SR) are filtered out and the recovered AC measuring signal (Sa) is normalized by the filtered out direct voltage signal (SR). This enables a method for combined analog and digital transmission to be obtained, whereby ageing phenomena of the optical fibre system (2,4,6) can be compensated.
    • 本发明通过的光波导(4)的装置和用于执行该方法的装置涉及一种用于模拟AC测量信号(SA)的组合的模拟和数字传输的过程。 根据本发明的一方面,数字化模拟交流测量信号(SA)和叠加在另一方面,一个恒定的DC信号(SR)中,数字化AC测量信号(SD)和模拟和信号(SRA)到一个调制信号(SM)进行了总结,在光传输信号 在接收器(6)返回到转换的调制信号(SM)从该信号(Sa ...,SD,SR)进行过滤,将回收的交流测量信号反应(SL),光传输信号(SL)(SA) (SR)是由滤波后的直流信号的装置归一化。 因此获得了一种用于组合的模拟和数字传输中,老化的光纤系统(2,4,6)被补偿。