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 ▼

[ I claim:] [1.] A sensor head for use in combination with at least one beam of electromagnetic radiation for detecting presence and magnitude of E-field and voltage, said sensor head comprising:polarizing means for polarizing said at least one beam such that said at least one beam comprises at leas

[ I claim:] [1.] A sensor head for use in combination with at least one beam of electromagnetic radiation for detecting presence and magnitude of E-field and voltage, said sensor head comprising:polarizing means for polarizing said at least one beam such that said at least one beam comprises at least two beam components in at least two orthogonal planes;transducing means for receiving said at least one beam from said polarizing means and inducing a differential phase shift of the beam components which varies in magnitude in response to the magnitude of an E-field; andfirst reflecting means for receiving said at least one beam from said transducing means and reflecting said beam back into said transducing means.