Multi-Surface Adjustment Method For Rail Vehicle Floor Laying

With the development of science and technology,people travel more and more conveniently.Rail trains,such as subway,light rail,high-speed rail,etc.is attracting more and more attention because of their fast and convenient characteristics.In the production process of rail vehicles,the floor covering installation of underframe is an important part,which include floor mounting seat,cold-proof layer and aluminum honeycomb floor.Floor mounting seat is composed of rubber seat and adjusting rubber pad.The size of rubber seat is fixed,and adjusting rubber pad has several different thickness,which is used to adjust the height of floor mounting seat.Before the floor is laid,it is necessary to determine the thickness of the adjusting rubber pad so that the floor mounting seat covered by the aluminum honeycomb board can be installed at the same height,then the force is uniform.Traditional method is manual measurement,which place U-shaped height fixture at both lateral ends of the vehicle,then the distance between the surface of the car body and the lower surface of the tooling can be measured with a trapezoidal plug with a difference of 1mm,so as to determine the thickness of the adjusting rubber pad in the rubber seat.This method does not leveling the longitudinal seat of the carriage,and has low efficiency,various errors and measurement accuracy cannot be guaranteed.Aiming at the above problems,based on the "Intelligent Multi-surface Detection and Adjustment Device for Railway Vehicles",in this paper the multi-surface adjustment method is studied for railway vehicle floor laying,and three algorithms are developed,including average slope method,improved average slope method and three-point plane method.Firstly,the research background of the subject and the commonly used plane fitting methods is introduced.Secondly,the device system is introduced,especially the laser scanner,PSD(Position Sensitive Device)photoelectric detector,measuring car,measuring control software and system working principle are introduced in detail.Thirdly,the mathematical model is established and the principles of the three algorithms are described in detail.Finally,the three algorithms are introduced,and the stability and accuracy are verified,and the measurement data of multi-train are analyzed.The three algorithms can meet the actual production needs,among which the reference plane calculated by the average slope method is a multi-surface composed of many planar blocks connected with each other,which is an ideal laying reference plane.The improved average slope method and the three-point plane algorithm calculate the reference plane composedof many planar blocks,which cannot be strictly connected with each other.Compared with the improved average slope method,the compensation data calculated by the three-point plane algorithm is closer to the compensation data measured by the traditional manual method.