Piezoelectric Oscillator Sounding Temperature Sensor Design And Radiation Error Correction

In the field of upper air temperature observation,the measurement accuracy of the sounding temperature sensor can be affected by many environmental factors,among which the main factor that causes the measurement error is solar radiation.Under high altitude and low wind speed conditions,due to the influence of solar radiation,the measurement value of high altitude air temperature will be higher than the true temperature of the atmosphere,and the resulting error is called radiation error.In order to reduce the solar radiation error,a sounding temperature sensor based on piezoelectric ceramic vibration was designed in this paper.The piezoelectric ceramic vibration is used to strengthen the radiation heat diffusion of the sensor.Using computational fluid dynamics method to simulate the piezoelectric vibrator sensor probe,to calculate the solar radiation error under different environmental conditions,including air velocity,solar radiation intensity,and altitude.The simulation results show that the solar radiation error has a monotonous increasing relationship with radiation intensity and altitude,and a monotonous decreasing relationship with air velocity.It is preliminarily verified that the piezoelectric vibrator sensor can reduce the solar radiation error through bending vibration.A support vector machine algorithm is used to fit and analyze the simulation data.The results show that the support vector machine algorithm has higher fitting accuracy.A radiation error test platform based on a low-pressure wind tunnel and a solar simulator was built to simulate high-altitude conditions to test the radiation error of the sensor.The experimental results show that the average absolute error between the sensor solar radiation error experimental value and the algorithm correction value is 0.05 K,and the root mean square error between the sensor solar radiation error experimental value and the algorithm correction value is 0.055 K.In order to verify the low radiation error characteristics of the piezoelectric vibrator sensor,the thermocouple sensor without the piezoelectric vibrator is used for comparison.The experimental results show that when the air velocity and altitude range are 1? 6m/s and 10 ? 30 km,the radiation error value of the piezoelectric vibrator sensor is lower than that of the thermocouple sensor,and the average absolute error between the two sensor is0.276 K,it shows that the piezoelectric vibrator sensor designed in this paper can effectively reduce the radiation error.This paper designs a radiation error query and correction system,the system uses Vue.js as the front-end development framework,and Spring MVC as the back-end development framework.The system can query and modify the radiation error under various influencing factors,and can query the radiation error value after algorithm correction,and complete the radiation error correction function.The realization of this system can provide convenience for researchers to observe temperature changes.