A sensor and measurement device and method based on a photoelectric oscillator

Abstract

The invention provides a photoelectric oscillator-based sensing and measuring device and method, which belong to the technical field of measurement and testing, and can quickly complete the detection of photoelectric oscillation signals without the help of external large-scale instruments, and obtain the starting position of the signal in a short period of time. Estimate the oscillation peak center frequency. The device includes: a passband splitting module, a passband signal detection module, and a terminal processing display module. The passband splitting module includes a broadband low-noise amplifier, a coupler, and multiple bandpass filters; the passband signal detection module includes an electrical amplifier, a detector, a voltage comparator, and an adjustable voltage source; the terminal processing display module includes a binary encoder, terminal processor and information display. The oscillation signal output by the photoelectric oscillation sensor is divided into multiple segment signals to be detected, and the passband information of the oscillation signal is obtained through its detection and discrimination, and the corresponding passbands are merged and solved, thereby obtaining the oscillation signal start position, Complete the fast detection of the oscillation signal.

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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