基于数据融合的动车外廓尺寸检测系统的设计

Design of Geometry Parameters Measure System Based on Data Fitting for Bullet Train's Profile

在现有的大尺寸测量方法基础上,根据机车检测的实际需求,提出了一种融合多种传感器数据的扫描式三坐标测量体系。系统在龙门架做直线平移时,采用一维激光测距传感器、二维水平仪、光纤应变力传感器和相应的数据采集技术依次测出车体各横截面的三坐标和测量误差源数据,设计了一种车体轮廓测量的误差补偿方法并建立相应的数学模型,然后将测得的各截面数据拟合成三维实体,最终求得所需尺寸和几何量参数,实现对机车车体主要结构尺寸的高精度、智能化测量。

Based on the existing large size measure method, it analyzes the actual situation of locomotive, develops a data matching scan type three - dimensional measure system using various sensors. When the gantry is linearly moving, the system gets the three dimension parameters of each cross section with corresponding data acqui- sition technology by using laser distance sensors, two dimension gradienters and strain force fiber sensors, makes out an error compensation scheme and corresponding mathematical model, establishes the mathematical model, matches all cross sections to be a complete three - dimensional - entity and finally calculates the necessary profile geometry parameters. This system realizes the measurement with high precision and intelligent.