摘要
针对传统云水含量传感器体积大、功耗大等局限性,设计了一种测量强对流天气中云水含量的微型云水含量传感器。通过理论分析和有限元仿真,对微型传感器在云中液态水的蒸发以及气流传热作用下的温度场进行仿真计算,得出加热电阻所需功率和云水含量之间关系。运用PID控制原理对传感器迎风面温度进行实时的控制,使其温度误差在±0.3℃范围内,实验结果表明,在云水含量为0.4g/m3时,传感器功耗仅为3.32W。经过模拟测试,该传感器体积小、功耗低、重量轻,可用来对强对流天气进行云水含量测量。
Traditional cloud liquid water sensors are relatively bulky and feature high power consumption of several hundred watts. A miniaturized cloud liquid water sensor which can measure the cloud liquid water in strong convective weather is proposed. By utilizing the theoretical analysis and the finite element simulation, the temperature distribution of sensor is simulated under the influence of liquid water evaporation and pneumatic flow. The relationship between the heating power requirement and the cloud water content is obtained. A PID algorithm is employed to control the temperature of the sensor windward side. The fluctuation of the temperature can be controlled with a range of ±0.3 ℃. The design and experiment results show that the sensor consumes only 3.32 W power when cloud liquid water content is 0.4 g/m3. This sensor possesses the advantages of small dimensions,light strong weight,low power consumption. It can potentionally be used to measure the cloud liquid water content in the strong convective weather.
出处
《电子器件》
CAS
北大核心
2012年第6期661-665,共5页
Chinese Journal of Electron Devices
基金
国家公益性行业(气象)科研专项项目(GYHY200906037
GYHY201106048)
国家自然科学基金项目(41075026)
江苏高校优势学科建设工程项目
江苏省科技支撑计划重点项目(BE2011006)
关键词
传感器
云水含量
有限元分析
温度控制
PID算法
sensor
cloud liquid water content
finite element simulation
temperature control
PID algorithm
