Analog signal separating and transferring system used for high voltage measuring
Title：
Analog signal separating and transferring system used for high voltage measuring
Application Number：
 200710121174
Application Date：
 2007/08/31
Announcement Date：
 2008/01/23
Pub. Date：
Publication Number：
 101109771
Announcement Number：
Grant Date：
Granted Pub. Date：
ApplicationType：
 Invention
State/Country：
 11[China|beijing]
IPC：
 G01R 15/14G01R 15/22G01R 15/24G01R 19/00
Applicant(s)：
 Tsinghua University
Inventor(s)：
 Zeng Rong, Geng Yinan, He Jinliang
Key Words：
 Analog signal, separating system, transferring system, high voltage, measuring
Abstract：
 The invention relates to an analogue-signal isolated transmission system for measuring high voltage, and pertains to the technical field of high voltage measurement. The system comprises: a laser light source for generating a linear polarization light beam; a signal modulator for coupling the linear polarization light beam with the signal modulator through a polarization-retaining optic fiber; a photoelectric converter for converting the optic power signals got after modulation by the signal modulator into voltage signals, which is connected with the signal modulator through a single-mode optic fiber; an electric signal detector for detecting the voltage signals output by the photoelectric converter, which is connected with the photoelectric converter through a radio-frequency cable. The invention can meet the isolated transmission of analogue and digital signals; the whole transmission system is an inactive system, with a wide application range; uses optic signals to communicate, which effectively avoids any disturbance in transmission, and is applicable for measuring hi-voltage area; the signal modulator in the system is of rapid response speed, high sensibility, and has improved the measuring frequency range and response speed.
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