摘要
为解决高空低风速太阳辐射误差大的难题,文中设计一种基于压电陶瓷振动的探空温度传感器。该传感器能利用压电陶瓷在高空气流速度较低时的振动产生速度。首先,使用计算流体动力学(CFD)方法对探头进行仿真,以气流速度、太阳辐射强度、海拔高度作为影响参数计算出太阳辐射误差;然后,使用支持向量机(SVM)训练仿真数据,得出辐射误差修正曲线;最后,搭建一个模拟高空条件的低气压风洞平台,对不同影响参数下的太阳辐射误差进行测试,并将测试结果与SVM算法的预测数据以及传统温度传感器的测量数据进行对比,以验证传感器的测量精度。实验结果表明,热电偶传感器的平均测量误差与均方根误差分别为0.050 K和0.051 K。与传统的探空温度传感器相比,文中的热电偶传感器能通过压电陶瓷振动的方式降低太阳辐射误差,测量精度较高。
A sounding temperature sensor based on piezoelectric ceramics vibration is designed to solve the difficulty that the solar radiation error is big at high-altitude low-wind speed. The sensor can generate speed signal by means of the vibration of piezoelectric ceramics at low airflow velocity in high altitude. The computational fluid dynamics(CFD) method is used to simulate the probe,and the airflow velocity,solar radiation intensity,and altitude are taken as the influence parameters to calculate the solar radiation error. The support vector machine(SVM) is used to train the simulation data to obtain the correction curve of the solar radiation error. A low-pressure wind tunnel platform that can simulate high-altitude conditions is constructed to test the solar radiation errors at different influencing parameters,on which the testing results are compared with the data predicted by the SVM algorithm and the data measured by traditional temperature sensor to verify the measuring accuracy of the sensor. The experimental results show that the average measurement error and the root-mean-square error of thermocouple sensor are 0.050 K and 0.051 K respectively. In comparison with the traditional sounding temperature sensor,the proposed thermocouple sensor can reduce the solar radiation error by the way of vibration of piezoelectric ceramic,and has high measuring accuracy.
作者
刘清惓
施泓伊
杨杰
LIU Qingquan;SHI Hongyi;YANG Jie(School of Electronics and Information Engineering,Nanjing University of Information Science and Technology,Nanjing 210044,China;Jiangsu Collaborative Innovation Center on Atmospheric Environment and Equipment Technology,Nanjing 210044,China;Jiangsu Key Laboratory of Meteorological Observation and Information Processing,Nanjing 210044,China)
出处
《现代电子技术》
2022年第10期15-20,共6页
Modern Electronics Technique
基金
国家公益性行业(气象)科研专项项目(GYHY200906037)
国家自然科学基金项目(41875035)
江苏省高等学校自然科学研究项目(18KJB530011)
南京信息工程大学人才启动经费项目(2243141701060)
江苏高校优势学科Ⅱ期建设工程项目(PAPD-Ⅱ)。
关键词
辐射误差修正
探空温度传感器
压电陶瓷
热电偶传感器
探头仿真
低气压风洞
精度测试
radiation error correction
sounding temperature sensor
piezoelectric ceramic
thermocouple sensor
probe simulation
low-pressure wind tunnel
accuracy test
