摘要
针对电梯变频器因电子元器件过热导致电梯停运问题,对红外热成像无损检测系统和电梯变频器的主要发热原因进行了理论研究,在此基础上提出了一种基于红外热成像的非接触式电梯变频器表面温度测量方法。基于热力学理论和红外辐射基本定律,建立了单位面积热辐射率与表面发射率和温度的数学表达式,以电梯控制柜中的变频器为监测对象,对其运行过程瞬态热特性进行了测试。研究结果表明:电梯变频器表面发热率变化对温度幅值影响较小,获取的热图像能明显区分出电路板中的不同发热区域;测试结果与理论分析基本一致,该技术可实现对电梯变频器在不停机条件下的非接触式温度测量。
Aiming at the problem of elevator stopped operation caused by the overheating of electronic components in the elevator inverter, the nondestructive testing system of infrared thermography and the cause of heating from elevator inverters were analyzed.On this basis, a non-contact measuring method by using infrared thermography was put forward to detect the surface temperature distribution of elevator inverters.Then, based on the thermodynamic theory and the fundamental law of infrared radiation, a mathematical expression of thermal radiance rate per unit area, surface emissivity and temperature was established.The elevator inverter was taken as the monitoring object and this transient thermal behavior during operation process was tested.The results indicate that the variation of the surface emissivity has little influence on the temperature amplitude of elevator inverters, and different heating areas can be clearly distinguished in the circuit board. Experimental results are consistent with the theoretical analysis, and the technology can realize non-contact measurement surface temperature of elevator inverters without stopping.
作者
郑波
徐金海
汪宏
徐雷
唐波
ZHENG Bo;XU Jin-hai;WANG Hong;XU Lei;TANG Bo(Hangzhou Special Equipment Inspection Institute, Hangzhou 310003, China;Collegeof Metrologyand Measurement Engineering, China Jiliang University, Hangzhou 310018, China)
出处
《机电工程》
CAS
北大核心
2019年第4期418-421,439,共5页
Journal of Mechanical & Electrical Engineering
基金
国家质量监督检验检疫总局科技计划项目(2016QK144)
浙江省自然科学青年基金资助项目(LQ16F030003)
关键词
电梯
变频器
热响应
红外热成像
状态监测
elevator
inverter
thermal response
infrared thermography
conditionmonitoring
