A novel, non-contact, thermal imaging sensor assembly for continuous bogie monitoring from Rail Vision Ltd

火车事故通常是由于转向架部件(车轮、车轴、刹车和轴承)磨损导致受影响的货车过热、断裂和脱轨。为了识别这种热量，在轨道一侧安装了热轴箱和热轮(HABD/HWD)检测单元。HABD/HWD使用红外(IR)传感器对通过转向架的红外辐射进行基于点的测量，这些辐射转换为电压并显示为绝对温度。HABD/HWD有局限性，例如对提供不准确信息的不正确目标点进行采样，以及太阳辐射的有害影响。尽管列车之前通过了HABD/HWD，但仍有约10%的热脱轨发生-这可能是低估了，因为安装了大部分欧盟HABD/HWD的德国与热脱轨的数量最多。Rail Vision有机会通过GB 582,405，24个月的原型项目开发一种检测转向架热量的系统。这种低成本、安装在起落架上的数字热电堆阵列模块(DTAM)与光学摄像机相结合，创建了一个连续的转向架监控系统(CBMS)。CBMS跟踪和记录热量，与转向架的光学数据合并，提供比HABD/HWD更准确的信息，并实现对转向架的远程实时监控(RTM)。CBMS将检测被监测组件的横截面上的温度梯度-为此，房车将生成定制的算法、数据通信协议和软件平台，以收集、跟踪和监控数据并发出警报。与单独的IR HABD/HWD采样相比，CBMS RTM能够更准确地评估温度异常--对于客户来说，这将提高其机车车辆的安全性，并降低维护成本。CBMS取代了HABD/HWD，通过监测转向架横截面与孤立区域的温度，使用户能够通过与光学成像合并准确地定位热异常，并跟踪和建立转向架性能的历史

Train accidents are often due to worn bogie parts (wheels, axles, brakes & bearings)overheating, breaking, & derailing the wagon affected. To identify this heat, Hot Axle Box &Hot Wheel (HABD/HWD) detection units are mounted at the track side. HABD/HWD useinfrared (IR) sensors to makes point based measurements of passing bogie IR radiation, whichis converted into electric voltages & displayed as absolute temperatures. There are limitationswith HABD/HWD, such as sampling of incorrect target points giving inaccurate information,as well as detrimental effects from solar radiation. ~10% of heat derailments occur despite thetrain having previously passed a HABD/HWD – likely an underestimate, as Germany, wheremost EU HABD/HWD are installed, has the highest number of heat-related derailments.The opportunity is for Rail Vision to develop a system to detect heat from bogies via a£582,405, 24-month development of prototype project. This low-cost, undercarriage-mounteddigital thermopile array module (DTAM), coupled to an optical camera, creates a continuousbogie monitoring system (CBMS). The CBMS tracks & records heat, merged with opticaldata from the bogie to provide more accurate information than HABD/HWD, & enablingremote, real-time monitoring (RTM) of the bogie. The CBMS will detect a gradient oftemperature across a cross-section of the component being monitored – to do this, RV willgenerate bespoke algorithms, data communication protocols & software platforms to collect,track & monitor data, & alert. CBMS RTM enables more accurate evaluation of temperatureanomalies than isolated IR HABD/HWD sampling – for customers, this will result in greatersafety of their rolling stock, and maintenance cost improvements. The CBMS supersedesHABD/HWD by monitoring temperature across cross-sections of bogies vs. isolated areas,allowing the user to accurately pinpoint heat anomalies via merging with optical imaging, &tracking & building a history of bogie performance