基于控制器局域网总线的车载轨道检测系统设计研制

为提高检测性能、简化系统结构,设计研制基于控制器局域网(CAN)总线的车载轨道检测系统,全部使用数字信号传感器,并将分立式传感器集成,将检测梁安装在车下,以检测梁作为惯性器件、激光摄像组件和数字式地面标志传感器ALD的安装平台;基于惯性基准测量技术、激光摄像测量技术、图像处理技术,通过CAN总线网络进行数字信号同步采集和传输,并根据检测梁与轨道之间的运动姿态关系,结合数字滤波及误差补偿和修正技术,建立与系统结构相匹配的数学计算模型,得到轨道的轨距、高低、轨向和水平等几何参数。通过实验室标定、第三方检验和现场实车测试,基于CAN总线的车载轨道检测系统的准确性、重复性和再现性等技术指标均达到相应的要求,且与现有型号的车载轨道检测系统相比零备件损耗可降低46%。

Design and Development of On-Board Track Inspection System Based on CAN Bus

In order to improve the detection performance and simplify the system structure,the on-board track inspection system based on Controller Area Network(CAN)bus is designed and developed,which uses all digital signal sensors and integrates the discrete sensors.The testing beam is installed under the vehicle,which is used as the installation platform of inertial measurement unit,laser camera unit and digital ground mark sensor ALD.Based on the inertial reference measurement technology,laser camera measurement technology and image processing technology,the digital signal is synchronously collected and transmitted through CAN bus network.According to the motion posture between the testing beam and the track,combined with digital filtering as well as error compensation and correction technology,the geometric parameters of track gauge,profile,alignment and crosslevel are obtained by establishing the mathematical model matching the system structure.Through laboratory calibration,third-party inspection and on-site real on-board test,the accuracy,repeatability and reproducibility of the on-board track inspection system based on CAN bus meet the corresponding requirements,and the loss of spare parts can be reduced by 46%compared with the existing onboard track inspection system.