Three-dimension detecting method for front window frame of high speed train body

Abstract

A three-dimension detecting method for a front window frame of a high speed train body comprises the steps of making an auxiliary detecting target to enable a total station to collect coordinates of all detection points; drawing an auxiliary detection line of the front window frame; translating an edge line of the window frame and a glass installation face to the target detection central point position in a three-dimensional diagram according to the height and width size between the target detection central point to the window frame edge line and the glass installation face, regarding a curve obtained through intersection as the auxiliary detection line of the window frame; dividing the front window frame into an upper left area, an upper right area, a lower left area and a lower right area through the connection line of the highest point of the front window frame and the lowest point of the front window frame and a front window frame beam, and taking the detection points of the same number in each of the four areas; fitting the detection curve of the part to be detected and a theory auxiliary detection line. By means of the three-dimension detecting method for the front window frame of the high speed train body, the conversion flow of a space rectangular coordinate system is simplified. Regarding parts like the front window frame of the high speed train body, although no clear reference points can be found on the parts, and the detection position cannot be reached, detection can be achieved perfectly.

Description

technical field [0001] The invention discloses a three-dimensional detection method for a front window frame of a high-speed EMU car body, which is used for evaluating whether the high-speed EMU car body satisfies the precision requirements for subsequent assembly and on-line operation, and belongs to the technical field of rail passenger car manufacturing. Background technique [0002] The shape of the front window frame of the high-speed EMU is complex, and the components themselves do not have any clear reference points. During the measurement process, a large amount of three-dimensional dimension data needs to be extracted to evaluate the two surfaces of the lower plane and the vertical edge of the front window frame and the front windshield. The deformation of the deformation cannot be measured using conventional detection tools such as tape measure, height gauge, square, distance meter, etc., but can be detected by using a total station. However, due to the special str...

AI Technical Summary

Problems solved by technology

However, due to the special structure of the front window frame at the front of the car body, it is impossible to use the online total station and change stations to realize all size inspections, and some detection areas cannot use the total station to directly collect inspection data

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