轨道与接触网几何检测融合技术研究

Research on Fusion Technology of Geometric Parameters Detection of Track and Catenary

为解决现有轨道和接触网几何参数检测系统相对独立、同步误差大的问题,对二者进行融合。改变检测系统硬件架构,统一两系统编码器脉冲及数据接口,提升系统硬件集成度及数据对齐精度;依据QNX系统开发融合系统软件,保证系统实时性及执行效率;制作L形工装,依据特征波形验证数据对齐精度;在实验室模拟车体振动的测试环境,分别采集静态及动态数据进行补偿算法验证。结果表明:融合后系统结构耦合度提高,避免了由定位信息密度低及网络延时原因造成的数据对齐误差;对激光摄像组件的测量数据进行复用,实现了接触网几何参数的补偿计算。经验证,融合系统运行稳定,可用于轨道与接触网几何参数检测数据的综合分析及超限判断。

In order to solve the problems of relative independence and large synchronization error of the existing geometric parameter detection systems of track and catenary,the fusion of them was implemented. The hardware architecture of the detection system was changed,the encoder pulse and data interface of the two systems were unified,and the hardware integration and data alignment accuracy of the system was improved. The fusion system software was developed according to QNX system to ensure real-time performance and execution efficiency of the system. L-shaped tooling was made and the data alignment accuracy was verified according to the characteristic waveform. The test environment of vehicle body vibration was simulated in the laboratory,the static and dynamic data was collected respectively to verify the compensation algorithm. The results show that the coupling degree of the system structure is improved after fusion,and the data alignment error caused by low location information density and network delay is avoided. The measurement data of laser camera module are reused to realize the compensation calculation of geometric parameters of catenary. It is verified that the fusion system operates steadily and can be used for comprehensive analysis and overrun judgment of geometric parameter detection data of track and catenary.