Pulse electric field detector with sensitivity coefficient self-calibration function and using method

Abstract

Pulse electric field detector with self-calibration function of sensitivity coefficient and its use method, including two parts: the front end of the detector and the back end of the detector; the front end of the detector includes the front end antenna, integrating circuit, amplifier circuit, electro-optic conversion circuit, electro-optic conversion circuit, control signal Response circuit and standard square wave generation circuit; the back end of the detector includes photoelectric conversion circuit, amplifier circuit, output circuit, photoelectric conversion circuit, switch control circuit, control signal generation circuit and electro-optic conversion circuit; the detector is placed in a standard pulse field environment , get its sensitivity coefficient S 0 , in the laboratory sensitivity coefficient stage, record the output amplitude U of the standard square wave transmitted from the front end to the back end through electro-optic-photoelectric conversion 0 ;In actual use, read the standard square wave output amplitude U in the current state 1 ;Sensitivity coefficient S of the system under the current test state 1 =S 0 ×(U 0 ÷ U 1 ), the present invention improves the accuracy of pulse electric field measurement.

Description

technical field [0001] The invention relates to the technical field of pulse electric field measurement, in particular to a pulse electric field detector with a sensitivity coefficient self-calibration function and a use method. Background technique [0002] As a transient electromagnetic phenomenon, electromagnetic pulse has the characteristics of high instantaneous energy, wide frequency spectrum, and high field strength. Electromagnetic pulses can cause interference or failure to electronic equipment through holes, cables and other channels, so the measurement of pulsed electric field signals is particularly important. [0003] (1) Classification of pulsed electric field detectors: [0004] Pulse electric field measurement detectors can be divided into passive detectors and active detectors. [0005] The pulsed electric field passive detector does not need a built-in power supply. The antenna structure includes a monopole cylindrical antenna, an asymptotic conical anten...

AI Technical Summary

Problems solved by technology

Automatic optical power control can only keep the output optical power of the laser constant, but cannot guarantee the constant luminous efficiency (optical power generated by unit current drive). The automatic temperature control circuit can keep the luminous efficiency of the laser constant, but the laser cooling circuit requires a higher power supply, which is difficult to meet in battery-powered pulsed electric field detectors

Furthermore, the above method cannot solve the problem of optical power variation caused by differences in optical paths

Therefore, the disclosed technical solution cannot solve the problem of detector sensitivity changes caused by differences in the luminous efficiency of semiconductor lasers and optical power attenuation in the optical path

Images