FIBER-OPTIC VOLTAGE METER Russian patent published in 2020 - IPC G01R15/22 G02B6/12 

FIELD: measurement technology.

SUBSTANCE: invention relates to the field of optoelectronic measurements, in particular to methods and devices for measuring voltage of parameters of alternating electric fields. Fiber-optic voltage meter comprises a laser radiation source, an optical decoupling device, the first output of which is connected to the fiber-optic light guide, and the second output is connected to the input of the photodetector, first sensitive element based on fiber Bragg grating, installed in measuring chamber so that to be under action of non-zero voltage component of measured electric field, and a microprocessor voltage control and measurement unit, the input of which is connected to the photodetector output, first output – to laser temperature control input, second output – to laser emission wavelength control input. Also, the fiber-optic measurement sensor additionally includes a second sensitive element based on the fiber Bragg grating, installed in the measuring chamber so as to be under the effect of the zero component of the voltage of the measured electric field, a fiber-optic switch which periodically couples the first and second sensitive elements to a fiber-optic light guide, and a dual-frequency probing radiation former mounted between the laser and the input of the optical decoupling device.

EFFECT: design of a fiber-optic voltage meter with high accuracy of measuring voltage of an alternating electric field.

1 cl, 3 dwg