Pulse electric field detector with sensitivity coefficient self-calibration and power management functions and using method thereof

Abstract

The invention provides a pulse electric field detector with sensitivity coefficient self-calibration and power management functions and a using method thereof. The detector comprises two parts including a detector front end and a detector back end. The detector front end includes a front end antenna, an integral circuit, an amplification circuit, an electrical-to-optical conversion circuit, an optical-to-electrical conversion circuit, a control signal response circuit and a standard square wave generating circuit. The detector back end includes an electrical-to-optical conversion circuit, an amplifying circuit, an output circuit, an optical-to-electrical conversion circuit, a switch control circuit, a control signal generating circuit and an electrical-to-optical conversion circuit. The detector is placed in a standard pulse field environment, the sensitivity coefficient S0 is obtained, and output amplitude U0 of a standard square wave from the front end to the back end through electrical-to-optical conversion and optical-to-electrical conversion is recorded in a laboratory sensitivity coefficient stage. In actual use, an output amplitude U1 of the standard square wave in a currentstate is read, the system sensitivity coefficient S1 in a current test state is S1=S0*(U0 / U1), and the accuracy of pulse electric field measurement is improved.

Description

technical field [0001] The invention relates to the technical field of pulsed electric field measurement, in particular to a pulsed electric field detector with the functions of self-calibration of sensitivity coefficient and power supply management and its 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 cylindr...

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

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