光热发电导热油泄漏在线检测方法研究  

Research on Online Detection Method for Conduction Oil Leakage of Photothermal Power Generation

作　　者：李文 温昕 蒋凯 马永跃 LI Wen;WEN Xin;JIANG Kai;MA Yongyue(Institute of Mechanical and Electrical Engineering,North China University of Technology;State Grid Beijing Electric Power Company Maintenance Branch)

机构地区：[1]北方工业大学机电工程研究所 [2]国网北京检修公司

出　　处：《仪表技术与传感器》2024年第3期105-109,共5页Instrument Technique and Sensor

摘　　要：针对光热发电导热油泄漏检测指标需求,基于MOS气体传感器技术提出了一种光热发电导热油泄漏检测方法,并通过实验验证了该方法的可行性。采用MOS气体传感器,通过气体改变金属氧化物涂层上的电子浓度,建立导热油检测数学模型,针对采集数据的非线性、非平稳特点,分别采用小波变换、快速傅里叶和希尔伯特黄3种降噪算法对MOS传感器输出信号进行降噪处理。实验结果表明:该检测方法在响应时间为8 s时,达到稳定测量值90%、检出限小于20 ppm,且稳定性好,测量精度高,达到了系统的设计要求。In response to the demand for leakage detection indicators of conduction oil in photothermal power generation,an innovative leakage detection method for conduction oil in photothermal power generation was proposed based on MOS gas sensor technology,and its feasibility was verified through design experiments.Using MOS gas sensors,based on the gas changing the electron concentration on the metal oxide layer,using AD to collect signals,a mathematical model for thermal oil detection was established.For the nonlinear and non-stationary characteristics of the collected data,three denoising algorithms including wavelet transform,fast Fourier and Hilbert,were used to denoise the output signal of the MOS sensor.The experimental results show that the response time of this detection method is 8 seconds to reach a stable measurement value.The detection limit is less than 20 ppm,and the system has good stability and high measurement accuracy,meeting the design requirements.

关 键 词：光热发电 MOS传感器 气体检测 导热油 泄漏检测 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置]