Sensing measurement device and method based on photoelectric oscillator

Abstract

The invention provides a sensing measurement device and method based on a photoelectric oscillator, belongs to the technical field of measurement and testing, and aims to quickly complete photoelectric oscillation signal detection without the help of an external large instrument, obtain a signal oscillation starting position in a short time and estimate the oscillation peak center frequency. The device comprises a passband segmentation module, a passband signal detection module and a terminal processing display module. The passband segmentation module comprises a broadband low-noise amplifier,a coupler and a plurality of band-pass filters; the passband signal detection module comprises an electric amplifier, a detector, a voltage comparator and an adjustable voltage source; and the terminal processing display module comprises a binary encoder, a terminal processor and an information display. An oscillation signal output by the photoelectric oscillation sensor is divided into a plurality of segment signals to be detected, passband information with an oscillation starting signal is obtained through detection and discrimination of the segment signals to be detected, corresponding passbands are combined and calculated, and therefore, the oscillation starting position of the oscillation signal is obtained, and rapid detection of the oscillation signal is completed.

Description

technical field [0001] The invention relates to signal detection technology, in particular to a photoelectric oscillator-based sensing and measuring device and method, belonging to the technical field of measurement and testing. Background technique [0002] In recent years, the idea of ​​microwave photonics has been greatly developed and applied in the field of optical fiber sensing, and the optoelectronic oscillator is an important device in microwave photonics. The earliest photoelectric hybrid oscillator was proposed by A.Neyer and E.Voges in 1982, which was composed of optical devices and microwave devices. The photoelectric oscillator structure in the prior art usually includes photoelectric devices such as laser sources, intensity modulators, long optical fibers, optical filters or microwave filters, microwave amplifiers or optical amplifiers, photodetectors, etc., using these components to build a positive feedback loop The road realizes self-starting vibration. Si...

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Problems solved by technology

The above-mentioned sensing measurements are all based on the photoelectric oscillator structure of the microwave photonic filter. Through some designs, the physical quantity to be measured is connected with the center frequency of the microwave photonic filter, and then the relevant target is obtained by monitoring the frequency of the microwave signal generated by the photonic oscillator. Measuring the information of physical quantities, so that the purpose of sensing can be achieved; for the discrimination method of photoelectric oscillation sensing measurement, a spectrum analyzer with high resolution and high speed is used to measure the microwave signal frequency, although it can effectively improve the sensing signal. Demodulation speed and resolution, but the system is heavy and complex, with a delay in inspection time

[0003] The current photoelectric oscillation sensing measurement is realized by connecting the microwave sensing signal generated by the photoelectric oscillator to the signal spectrum analyzer for analysis. The microwave sensing signal analyzed at this time is the output of the photoelectric oscillator when it oscillates to stability , there are the following defects: (1) the precise measurement of the microwave sensing signal can only be realized after the oscillation signal is completely stable, and it is necessary to obtain accurate measurement results at the expense of time cost; (2) the detection of the sensing signal at the initial stage of oscillation is directly It is related to the measurement of the subsequent sensing signal, and the spectrum analyzer needs to adjust various parameters to accurately detect the signal in a small range when analyzing the signal, so it is not suitable for the detection of the signal at the initial stage of oscillation

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