塔式起重机钢丝绳探伤监测预警技术浅析

在塔式起重机特定部位安装磁化体设备和传感器,通过电磁装置将传动钢丝绳内部化为均匀一致可以检测的磁场,通过传感器对钢丝绳中的磁信号进行自主分析,再通过精确的算法来识别钢丝绳的损伤情况,并将带有钢丝绳损伤信息的数字信号传递发送至云平台,结合物联网技术和云平台监控手段对钢丝绳的损伤情况进行实时全工况在线检测,从而达到风险预警的目的,并为钢丝绳的安全使用提出预防性维保建议,从根源上化解塔机断绳事故隐患,从而实现对钢丝绳磨损的有效监管,给建筑施工从业者提供一个安全有序的施工环境。

郑州市1997～2001年放射人员个人剂量监测结果与分析

报道了郑州市 1997～ 2 0 0 1年度放射职业人员个人剂量监测结果。 5年度各年均剂量当量分别为 2 5 8,1 74 ,1 92 ,1 72 ,1 70mSv。其中医用诊断X射线、核医学、放射治疗、工业探伤及其他工种历年来个人剂量均值分别为 1 79,4 96 ,2 13,1 70 ,1 6 5mSv ,年剂量当量 <5mSv/a的占 97 5 %。在个人剂量监测管理中 ,核医学监测率高达 6 6 0 %～ 10 0 % ,医用诊断X射线工作人员监测率为 6 0 %～ 80 % ,工业探伤监测率 <6 0 %。对放射职业人员个人剂量的监测是评价辐射防护效果及辐射影响的重要指标。

Development and Application of On-Line Corrosion Monitoring Device for Condenser Tube

This paper introduces the development and industrial application of an on-line corrosion monitoring device for condenser tubes. Corrosion sensors are made up of representative condenser tubes chosen by eddy current test, which enable the monitoring result to be consistent with the corrosion of actual condenser tubes. Localized corrosion rate of condenser tubes can be measured indirectly by a galvanic couple made up of tube segments with and without pits. Using this technology, corrosion problems can be found in time and accurately, and anticorrosive measures be made more economic and effective. Applications in two power plants showed the corrosion measurements are fast and accurate.