阳光照射下汽车内部件温度的数学模型
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摘要
由于温室效应的存在,阳光照射条件下汽车内部温度往往高于环境温度,降低了乘车的舒适度。为了研究阳光照射下车内温度的变化规律,根据天文学理论,建立了太阳辐射模型;采用机理建模方法,建立了汽车内座椅、表盘、空气、玻璃的数学模型。以STC89C52单片机为核心,采用DS18B20温度传感器,设计无线多点温度采集系统,进行车内实际温度测量。通过温度数据对比验证了机理数学模型的正确性。在此基础上,建立了不同阳光辐射条件下车内部件温度的传递函数模型,为车内温度控制研究提供了依据。
Due to the greenhouse effect,the car interior temperature is often higher than the ambient temperature under sunlight. To study the variation of the temperature inside the vehicle under sunlight,a solar radiation model was built based on astronomical theories. The mathematical models of the car seat,dashboard,air and glass were established with mechanism modeling method. A multi-point temperature wireless acquisition system was designed based on STC89C52 microcontroller and DS18B20 temperature sensor to measure the temperature inside cars. The correctness of the mechanism mathematical model was verified in comparison with temperature data. Based on this,a transfer function model of the car interior temperature under different solar radiation conditions was established. It provides a foundation for study on the car interior temperature control.
Due to the greenhouse effect,the car interior temperature is often higher than the ambient temperature under sunlight. To study the variation of the temperature inside the vehicle under sunlight,a solar radiation model was built based on astronomical theories. The mathematical models of the car seat,dashboard,air and glass were established with mechanism modeling method. A multi-point temperature wireless acquisition system was designed based on STC89C52 microcontroller and DS18B20 temperature sensor to measure the temperature inside cars. The correctness of the mechanism mathematical model was verified in comparison with temperature data. Based on this,a transfer function model of the car interior temperature under different solar radiation conditions was established. It provides a foundation for study on the car interior temperature control.
引文
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[3]林媛.太阳辐射强度模型的建立及验证[J].安徽建筑工业学院学报,2007,15(5):44-46.
[4]白盛强.浅谈光伏设计中的太阳相关计算[J].城市建设理论研究(电子版),2013(19):12.
[5]刘浩,尹宝树.一个可用于实时计算的太阳辐射模型[J].海洋与湖沼,2006,37(6):493-497.
[6]邱国全,夏艳君,杨鸿毅.晴天太阳辐射模型的优化计算[J].太阳能学报,2001,22(4):456-460.
[7]宋志俊.考虑车体形状的轿车热辐射模型及底板空气综合温度的初步研究[D].南京:东南大学,2006.
[8]张军.温室环境系统智能集成建模与智能集成节能优化控制[D].上海:上海大学,2013.
[9]金星,张小松,邱童,等.不同朝向玻璃窗太阳辐射得热系数模拟与实验研究[J].太阳能学报,2009,30(12):1666-1671.
[10]文妙妙.车室内流场和温度场的仿真模拟和试验研究[D].西安:长安大学,2013.
[11]申红丽.汽车乘员舱热舒适性分析及优化[D].长沙:湖南大学,2013.
[12]陆斯媛.汽车驾驶室室内温度场仿真及试验研究[D].北京:北京建筑大学,2015.
[13]刘威.基于DS18B20和n RF9E5的多点无线测温系统[D].长春:吉林大学,2008.
[14]谭量,胡冀.基于n RF9E5的多点无线温度采集系统设计[J].杭州电子科技大学学报,2006(4):30-33.
[15]姚晔,连之伟,侯志坚,等.上海地区空调车内优化设定温度模型[D].上海:上海交通大学,2005.
[16]郭芬芬.基于Matlab日光温室土壤二维传热模型的建立与应用[D].保定:河北农业大学,2014.