一种跨座式单轨车弓网接触力检测系统

A Pantograph-Catenary Contact Force Detection System for Straddle Type Monorail Vehicle

接触网和受电弓接触是否良好直接关系到列车的运行安全,而弓网接触力是衡量弓网受流质量和评价运行线路状况的重要指标。设计了一种跨座式单轨车弓网接触力检测系统,将光纤光栅应变计和温度计粘贴在受电弓的集电舟基板上,光栅解调仪将传感器的光信号转化为应变值发送给上位机,上位机对应变值数据处理得到弓网接触力。通过对集电舟的应力分析确定了光栅应变计最佳的粘贴位置,通过最小二乘拟合算法实现将集电舟应变值转换为弓网接触力;采用单轨车受电弓性能试验台对该系统进行标定,检测精度达到±5 N。该系统安装在跨坐式单轨车对重庆轨道交通3号线童家院子到鱼洞运行段进行弓网接触力检测,对运行线路状态评估。该测量系统具有可安装在运行车辆上,对受电弓结构影响小,可对弓网接触力实时监测的优点。

Whether the contact between the catenary and the pantograph is good is directly related to the safety of the train’s operation,and the pantograph-catenary contact force is an important indicator to measure the quality of the pantograph-catenary and evaluate the condition of the running line.A pantograph-catenary contact force detection system for straddle type monorail vehicle is designed.The fiber grating strain gauge and thermometer are pasted on the pantograph’s current collector boat substrate.The grating demodulator converts the optical signal of the grating strain gauge into strain.And its value is sent to the upper computer,the upper computer processes the corresponding variable value data to obtain the pantograph-catenary contact force.Through the stress analysis of the collector boat,the best sticking position of the grating strain gauge is determined,and the strain value of the collector boat is converted into the pantograph-catenary contact force through the least square fitting algorithm.The system was calibrated using the monorail pantograph performance test bed of CRRC Sifang Institute,and the detection accuracy reached±5 N.The system is installed on a straddle-type monorail to detect the pantograph-catenary contact force of Chongqing Rail Transit Line 3 from Longtou Temple to Jurenba.The measurement system has the advantages that it can be installed on a running vehicle,has little impact on the pantograph structure,and can monitor the pantograph-catenary contact force in real time.