초록 ▼

A miniature electro-optic voltage sensor system capable of accurate operation at high voltages. The system employs a transmitter, a sensor disposed adjacent to but out of direct electrical contact with a conductor on which the voltage is to be measured, a detector, and a signal processor. The transm

A miniature electro-optic voltage sensor system capable of accurate operation at high voltages. The system employs a transmitter, a sensor disposed adjacent to but out of direct electrical contact with a conductor on which the voltage is to be measured, a detector, and a signal processor. The transmitter produces a beam of electromagnetic radiation which is routed into the sensor where the beam undergoes the Pockels electro-optic effect. The electro-optic effect causes phase shifting in the beam, which is in turn converted to a pair of independent beams, from which the voltage of a system based on its E-field is determined when the two beams are normalized by the signal processor. The sensor converts the beam by splitting the beam in accordance with the axes of the beam's polarization state (an ellipse whose ellipticity varies between -1 and +1 in proportion to voltage) into at least two AM signals. These AM signals are fed into a signal processor and processed to determine the voltage between a ground conductor and the conductor on which voltage is being measured.

대표청구항 ▼

[ We claim:] [1.] A sensor for sensing voltage in an E-field developed between a conductor means and a grounded conductor means, said voltage sensor comprising:transmitting means for transmitting at least one beam of polarized electromagnetic radiation, said beam having at least two components propa

[ We claim:] [1.] A sensor for sensing voltage in an E-field developed between a conductor means and a grounded conductor means, said voltage sensor comprising:transmitting means for transmitting at least one beam of polarized electromagnetic radiation, said beam having at least two components propagating along at least two orthogonal planes, respectively, to form at least two orthogonal beam components;sensing means configured for disposition between the conductor means and the grounded conductor means but out of contact with the conductor means for sensing the presence of the E-field and inducing a differential phase shift on the orthogonal beam components when said sensing means is in said E-field as the beam travels along a path through the sensing means;reflector means disposed adjacent to the sensing means and positioned for receiving the at least one beam from the sensing means when the beam has passed out of the sensing means and for channeling the been along a path substantially parallel to the path through the sensing means;detecting means for detecting said differential phase shift of said orthogonal beam components; andfirst and second routing means, said first routing means for routing said beam from said transmitting means to said sensing means, and said second routing means for routing said beam components from said sensing means to said detecting means.