基于热图像分析的电梯闸皮不均匀磨损检验方法研究  

Test method to elevator's brake shoe's uneven wear based on thermal image analysis

作　　者：王逸铭 吴尽[2] 胡建中[1] 彭英[1] WANG Yi-ming;WU Jin;HU Jian-zhong;PENG Ying(School of Mechanical Engineering,Southeast University,Nanjing 211189,China;Jiangsu SpecialEquipment Safety Supervision and Inspection Research Institute Yangzhou branch,Yangzhou 225000,China)

机构地区：[1]东南大学机械工程学院,江苏南京211189 [2]江苏省特种设备安全监督检验研究院扬州分院,江苏扬州225000

出　　处：《机电工程》2018年第11期1210-1213,共4页Journal of Mechanical & Electrical Engineering

摘　　要：针对电梯闸皮易出现不均匀磨损故障导致电梯制动失效问题,对电梯闸皮不均匀磨损发生原因和对电梯制动影响进行了归纳,对电梯制动的系统内能变化进行了理论分析和研究,得到了电梯制动时闸皮表面的热流率变化情况。提出了一种基于热像图像分析的电梯闸皮不均匀磨损检验方法,采集了电梯制动时闸皮表面的红外热像图像,过滤了采集过程中出现的混合噪声,提取了等温线特征向量和闸皮边缘特征向量,通过计算等温线特征向量与电梯闸皮的边缘特征向量之间的弗雷歇距离,表征了被测电梯闸皮的不均匀磨损程度,并对正常闸皮与不均匀磨损闸皮的红外热像图像进行了对比分析。研究结果表明:该方法可以解决电梯在不解体情况下无法定量检测闸皮不均匀磨损问题。Aiming at the problem of elevator braking failure caused by the uneven wear of the elevator brake, the reasons for the uneven wear and the influence of the elevator brake were summarized.The internal energy change of the elevator brake system was analyzed and studied.The change of the heat flux on the surface of the elevator brake was obtained, and a kind of elevator brake based on the thermal image analysis was put forward. The uneven wear test method was used to collect the infrared thermal image of the brake skin on the elevator brake, the mixed noise in the collection process was filtered out, the isotherm feature vector and the gate edge feature vector was extracted, and the uneven wear degree of the elevator brake skin was characterized by calculating the frying distance between the characteristic vector of the isothermal line and the edge eigenvector of the elevator brake .The results indicate that this method can detect the uneven wear of the elevator brake, and figure out the problem that the elevator can not detect the uneven wear of the brake under the condition of undisintegration.

关 键 词：电梯制动性能 不均匀磨损 红外热像图像 混合降噪 弗雷歇距离 

分 类 号：TH117.1[机械工程—机械设计及理论] TU857[建筑科学]