基于K型热电偶温度传感器的测温系统研究
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摘要
在飞机热交换器健康状态检测采集温度时,对于精确性和便捷无线传输要求的问题,建立一个利用K型热电偶温度传感器进行温度采集的系统。该系统将采集到的数据通过WiFi进行传输,并利用静态校准和数据拟合的方法提高测量精度。系统结合上位机,可实现在远离恶劣的实际工作环境下完成温度的实时采集、保存、分析和历史查询。实验结果表明,该系统不仅成本低、易操作,而且经过静态校准和数据拟合之后,传感器测量精度能够控制在0.5℃以内,可实现较精确的温度采集。
In allusion to the requirements of accuracy and convenient wireless transmission during the temperature acquisition for health state detection of the aircraft′s heat exchanger,a system for temperature acquisition using a K-type thermocouple sensor is built. In the system,the collected data is transmitted via WiFi. The static calibration and data fitting methods are used to improve the measurement accuracy. The system in combination with the upper computer can realize real-time collection,storage,analysis and historical query of the temperature far away from the harsh practical working environment. The experimental results show that the system is low-cost,and easy to operate with its sensor measurement accuracy controlled within 0.5 ℃ after static calibration and data fitting,which can achieve accurate temperature acquisition.
In allusion to the requirements of accuracy and convenient wireless transmission during the temperature acquisition for health state detection of the aircraft′s heat exchanger,a system for temperature acquisition using a K-type thermocouple sensor is built. In the system,the collected data is transmitted via WiFi. The static calibration and data fitting methods are used to improve the measurement accuracy. The system in combination with the upper computer can realize real-time collection,storage,analysis and historical query of the temperature far away from the harsh practical working environment. The experimental results show that the system is low-cost,and easy to operate with its sensor measurement accuracy controlled within 0.5 ℃ after static calibration and data fitting,which can achieve accurate temperature acquisition.
引文
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[3]李立群,吴颖建.波音737NG飞机空调系统健康检查及故障预测方法[J].航空维修与工程,2015(7):90-92.LI Liqun,WU Yingjian. Methods of performance monitoring on B737NG air conditioning system[J]. Aviation maintenance&engineering,2015(7):90-92.
[4]吴成云,汪光文,李革萍,等.民用飞机空调系统仿真分析[J].航空动力学报,2015,30(9):2073-2079.WU Chengyun,WANG Guangwen,LI Geping,et al. Simulation analysis of air conditioning system of civil aircraft[J]. Journal of aerospace power,2015,30(9):2073-2079.
[5]李宗帅,林家泉,王修岩.基于地面桥载空调的飞机客舱温度系统建模及控制[J].现代电子技术,2017,40(22):5-9.LI Zongshuai, LIN Jiaquan, WANG Xiuyan. Modeling and control of aircraft cabin temperature system based on airport bridge-borne air conditioner[J]. Modern electronics technique,2017,40(22):5-9.
[6]马旻昱.飞机空调热交换器的污染机理及清洗工艺的优化[D].天津:中国民航大学,2015.MA Minyu. Pollution mechanism for heat exchanger of aircraft′s air conditioner and its cleaning process optimization[D]. Tianjin:Civil Aviation University of China,2015.
[7]崔陆军,尚会超.基于AVR单片机的无线测温系统[J].仪表技术与传感器,2012(9):57-59.CUI Lujun,SHANG Huichao. Wireless temperature detecting instrument based on AVR[J]. Instrument technique and sensor,2012(9):57-59.
[8]潘方.RS 232串口通信在PC机与单片机通信中的应用[J].现代电子技术,2012,35(13):69-71.PAN Fang. Application of RS 232 serial port in communication between PC and MCU[J]. Modern electronics technique,2012,35(13):69-71.
[9]江月新,黄云龙,余建军.基于WiFi通信的矿井监测无线传感器网络研究[J].煤炭技术,2017,36(6):278-280.JIANG Yuexin,HUANG Yunlong,YU Jianjun. Research on mine monitoring wireless sensor network based on WiFi communication[J]. Coal technology,2017,36(6):278-280.
[10]刘海成.AVR单片机原理及测控工程应用:基于ATMega48/ATMega16[M].2版.北京:北京航空航天大学出版社,2015.LIU Haicheng. AVR microcontroller principle and application of measurement and control engineering:based on ATMega48/ATMega16[M]. 2nd ed. Beijing:Beihang University Press,2015.
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