Multi-Surface Detection And Compensation System For Rail Vehicle Bottom

With the development of the technology,the high-tech is ubiquitous to bring the plentiful convenience to the lives of ordinary people.According to the statistics,there have been bonus rail transit length of 2000 km in total during 2016-2018 in Chinese first and second-tier cities and the accumulated length of rail transit in 26 cities across the country exceeds 5000 km.The mature manufacturing technology of rail train yield the more rigid standards of it including internal dimensions,operating speed and stability,long-term use of deformation et al.Among these,the flatness of train bottom as an indispensable indicators which effect the subsequent workpiece installation and passenger ride experience directly needs to be strictly tested.Traditional manual measurement method is to take a row of sampling points at intervals of several meters,and to determine the difference height by adding a gradient gauge 1mm between the tooling and the bottom of the vehicle.A car usually needs to set up hundreds of sampling points.Completing the measurement of one car alone to compensate for two jobs requires three to four workers to work for half an hour,and there is a lack of correlation between the compensation data at the sampling points between the lines.On grounds of the low measurement efficiency and accuracy and poor detection correlation,the traditional manual measurement method has suffered a lot of criticism.The work of this study based on the conventional laser collimation method are as follows:the advantages and disadvantages of different laser generation method modules are compared,the error analysis of the laser generation module and the laser line-width are completed.The data acquisition function of the detection module is improved,the wireless communication function is added,and the measurement precision of the sensor is completed.According to the data collected by the laser collimation method,the coordinate conversion,outlier analysis and surface fitting of the data are completed based on the working principle and the actual vehicle face pattern.The whole detection and compensation system can reach lmm within the working radius of 15m.The automatic measurement of large range,high precision and real time is realized with the digital acquisition scheme,which solves the practical problems of large measurement error and low degree of automation.