A voltage sensing device and detection method for combined use of elasto-optic modulation and electro-optic modulation
A voltage detection method and an elastic-optical modulation technology are applied in measurement devices, voltage/current isolation, measurement using digital measurement technology, etc., which can solve the limitations of mass production and commercial application of photovoltage sensors, output signal changes with temperature, Poor interchangeability and other problems, to achieve the effect of being conducive to industrial automation integration, high modulation frequency, and stable operation of purity
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[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0030] Such as figure 1 As shown, a voltage sensing device combined with elasto-optic modulation and electro-optic modulation is characterized in that it includes a detection light source 1, a collimating lens 2, a polarizer 3, an elasto-optic modulator 4, an electro-optic sensing element 5, Polarizer 6, photodetector 7, signal acquisition and digital phase-lock module 8 and computer 9; Described signal acquisition and digital phase-lock module 8 comprise FPGA...
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