Design And Application Of Sensor Based On Photoelectric Oscillation

In recent years,sensors based on photoelectric oscillation have been widely studied in the measurement of temperature,pressure,vibration,refractive index,velocity and other physical quantities.The application of photoelectric oscillation technology in sensing and measurement can make the sensor based on photoelectric oscillation obtain more advantages than the conventional sensor,such as high sensitivity and precision of sensing and measurement,strong anti-electromagnetic interference and strong reconfigurable,etc.However,the sensor based on photoelectric oscillation also faces some problems that need to be solved urgently,including:the previous sensor based on photoelectric oscillation can only carry out single point or single parameter measurement,but cannot carry out multi-point or multi-parameter measurement;The problem that the fast sensor response cannot be realized leads to the failure to measure the transient variable;The dynamic self-calibration problem cannot be carried out for the change of environment or sensor parameters.In this paper,the problems mentioned above in the measurement application of the sensor based on photoelectric oscillation are investigated,and the solutions or improvement methods are proposed.The main research of this paper mainly includes the following aspects:Firstly,the basic principle and development process of the optoelectronic oscillator are introduced,and a tunable method of the optoelectronic oscillator is proposed,which can solve the stability problem caused by the dependence on the narrow-band light source and the discrete structure.The development status of the sensor based on photoelectric oscillation at home and abroad is investigated in detail.The detection methods of the sensor based on photoelectric oscillation in some physical quantities and the specific technical parameters described in detail.Secondly,a lumped/distributed sensing system based on photoelectric oscillation under a unified architecture is proposed to measure a series of variables or multipoint distributed variables,since the sensor based on photoelectric oscillation cannot realize multi-parameter or multi-point measurement.The sensor technology based on photoelectric oscillation and its sensing technology to realize the route are studied.Thirdly,in view of the problem that the sensor based on photoelectric oscillation cannot realize fast sensor response and cannot measure the transient variable,a standard for fast vibration initiation of the sensor based on photoelectric oscillation is proposed,which solves the problem that the sensor based on photoelectric oscillation cannot measure quickly before and realizes the measurement and sensing of the transient variable.The experimental results verify the feasibility of the method.The sensor response time is 1/5 of the previous one,and the sensor sensitivity of starting vibration with the "inflection point" of bandwidth change as the sensor is-86.02mhz/FBG.Fourth,sensor based on photoelectric oscillation can’t since the calibration problem,in the environment and the sensing parameters can change sensor calibration,this paper proposes a reconfigurable measurement precision,dynamic calibration error sensor based on photoelectric oscillation system,realize the measuring precision of the sensor of the adjustable range of 6.09 to 9.56 GHz/(N/mm)and can be as high as 40% error dynamic calibration.It solves the problem that the sensor based on photoelectric oscillation cannot self-calibrate and has poor adaptability to environmental changes,and improves the application of the sensor based on photoelectric oscillation in measurement.