阅读说明：本技术 一种动车组车体面罩的三维测量方法 (Three-dimensional measurement method for motor train unit body cover ) 是由 庄晓忠 朱文战 陈刚辉 张可可 谭旺有 褚玉佳 候建芬 谈健宏 于 2021-08-27 设计创作，主要内容包括：本发明公开了一种动车组车体面罩的三维测量方法,其方法步骤如下：1：在检测机上连接好追踪仪、扫描仪以及校准棒；2：进行追踪仪的校准；3：完成扫描仪的校准；4：在追踪仪能观察到扫描仪的前提下,保持扫描仪与待测车体面罩一定距离,匀速移动扫描仪,通过扫描仪投影到待测车体面罩的激光线来完成检测机对数据的采集；5：将采集到的数据导入检测机,再将车体面罩的设计图纸导入检测机进行数据对比,完成尺寸的检测。对比传统检测方式,该测量方法能快速且精准地获取复杂结构工件的检测结果,而且方便数据备份归档,有效减少测量误差。(The invention discloses a three-dimensional measurement method of a motor train unit body cover, which comprises the following steps: 1: a tracker, a scanner and a calibration rod are connected to the detection machine; 2: calibrating the tracker; 3: completing the calibration of the scanner; 4: on the premise that the tracker can observe the scanner, keeping a certain distance between the scanner and the car body mask to be detected, moving the scanner at a constant speed, and completing data acquisition of the detector through a laser line projected to the car body mask to be detected by the scanner; 5: and importing the collected data into a detection machine, and importing the design drawing of the car body mask into the detection machine for data comparison to finish the size detection. Compared with the traditional detection mode, the measurement method can quickly and accurately obtain the detection result of the workpiece with the complex structure, is convenient for data backup and filing, and effectively reduces the measurement error.)

1. A three-dimensional measurement method for a motor train unit body cover is characterized by comprising the following steps: the method comprises the following steps:

step S1: a tracker, a scanner and a calibration rod are connected to the detection machine;

step S2: placing the tracker as required, holding the calibration rod by hand according to the prompt of the detection machine, and calibrating the tracker by moving to a specific position and placing a specific angle;

step S3: according to the prompt of the detection machine, the handheld scanner is placed at the calibration position of the calibration rod to complete the calibration of the scanner;

step S4: on the premise that the tracker can observe the scanner, keeping a certain distance between the scanner and the car body mask to be detected, moving the scanner at a constant speed, and completing data acquisition of the detector through a laser line projected to the car body mask to be detected by the scanner;

step S5: and importing the collected data into a detection machine, and importing the design drawing of the car body mask into the detection machine for data comparison to finish the size detection.

2. The three-dimensional measurement method of the motor train unit body cover as claimed in claim 1, wherein the three-dimensional measurement method comprises the following steps: the detector is internally provided with a shutter parameter adjusting module for offsetting the influence of black, reflective and transparent objects on the measurement.

3. The three-dimensional measurement method of the motor train unit body cover as claimed in claim 1, wherein the three-dimensional measurement method comprises the following steps: and the scanner is provided with an intensity button for adjusting the laser line.

4. The three-dimensional measurement method of the motor train unit body cover as claimed in claim 1, wherein the three-dimensional measurement method comprises the following steps: the detector is internally provided with a deviation chromatogram module, and the data deviation of the measured car body mask and the design drawing is visually represented by adopting color difference.

5. The three-dimensional measurement method of the motor train unit body cover as claimed in claim 1, wherein the three-dimensional measurement method comprises the following steps: and the detection machine measures the 3D size of the car body mask according to the collected data.

6. The three-dimensional measurement method of the motor train unit body cover as claimed in claim 1, wherein the three-dimensional measurement method comprises the following steps: and the detector measures the form and position tolerance of the car body mask according to the collected data.

Technical Field

The invention relates to a three-dimensional measurement method, in particular to a three-dimensional measurement method for a motor train unit body cover.

Background

In order to reduce wind resistance generated when a rail transit vehicle travels at a high speed, the head of a general vehicle is designed with more complex curved surfaces, and the surface profile is an important parameter which needs to be measured frequently when a subway is newly built or overhauled. At present, when various sizes of a motor train unit body cover are measured, a measuring tape is often used for measurement. Because this face guard is the curved surface, the perpendicular distance between the unable assurance datum point of tape measure needs to measure repeatedly, and measurement efficiency is low and the measured value has great error. Especially for the parameter control of curved surfaces, the traditional measurement can only be carried out by using a product checking tool, and the checking tool can also have abrasion to cause larger detection error.

Disclosure of Invention

In order to overcome the defects of the manufacturing method, the invention provides the three-dimensional measuring method of the motor train unit body cover, which can effectively reduce the measuring error.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a three-dimensional measurement method for a motor train unit body cover comprises the following steps:

step S1: a tracker, a scanner and a calibration rod are connected to the detection machine;

step S2: placing the tracker as required, holding the calibration rod by hand according to the prompt of the detection machine, and calibrating the tracker by moving to a specific position and placing a specific angle;

step S3: according to the prompt of the detection machine, the handheld scanner is placed at the calibration position of the calibration rod to complete the calibration of the scanner;

step S4: on the premise that the tracker can observe the scanner, keeping a certain distance between the scanner and the car body mask to be detected, moving the scanner at a constant speed, and completing data acquisition of the detector through a laser line projected to the car body mask to be detected by the scanner;

step S5: and importing the collected data into a detection machine, and importing the design drawing of the car body mask into the detection machine for data comparison to finish the size detection.

Further improvement: the detector is internally provided with a shutter parameter adjusting module for offsetting the influence of black, reflective and transparent objects on the measurement.

Further improvement: and the scanner is provided with an intensity button for adjusting the laser line.

Further improvement: the detector is internally provided with a deviation chromatogram module, and the data deviation of the measured car body mask and the design drawing is visually represented by adopting color difference.

Further improvement: and the detection machine measures the 3D size of the car body mask according to the collected data.

Further improvement: and the detector measures the form and position tolerance of the car body mask according to the collected data.

The invention has the beneficial effects that: by utilizing the three-dimensional measurement method, the three-dimensional model of the car body mask to be detected can be quickly and accurately obtained, and then the required detection result can be obtained by inputting the design drawing in the detection machine. Compared with the traditional detection mode, the measurement method can quickly and accurately obtain the detection result of the workpiece with the complex structure, is convenient for data backup and filing, and effectively reduces the measurement error.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments.

A three-dimensional measurement method for a motor train unit body cover comprises the following steps:

step S1: a tracker, a scanner and a calibration rod are connected to the detection machine;

step S2: placing the tracker as required, holding the calibration rod by hand according to the prompt of the detection machine, and calibrating the tracker by moving to a specific position and placing a specific angle;

step S3: according to the prompt of the detection machine, the handheld scanner is placed at the calibration position of the calibration rod to complete the calibration of the scanner;

step S4: on the premise that the tracker can observe the scanner, keeping a certain distance between the scanner and the car body mask to be detected, moving the scanner at a constant speed, and completing data acquisition of the detector through a laser line projected to the car body mask to be detected by the scanner;

and determining the surface position according to triangulation and recording data according to the positions of the scanner, the body mask to be measured and the tracker. The visibility of the laser line on the part is a key factor in the success or failure of data acquisition. The visibility of the laser line is affected by the color and type of material. High reflectivity components tend to produce mirror effects, making it difficult to read the laser lines on the components. Black absorbs light and also makes the laser line difficult to read due to lack of contrast. The detector is internally provided with a shutter parameter adjusting module for offsetting the influence of black, reflective and transparent objects on the measurement.

In addition, the scanner is provided with an intensity button for adjusting the laser line. When the surface of the car body mask to be measured is white, the laser line with weaker intensity is adjusted to scan.

Step S5: and importing the collected data into a detection machine, and importing the design drawing of the car body mask into the detection machine for data comparison to finish the size detection.

In this embodiment, the deviation chromatogram module is built in the detector, and the measured data deviation between the car body mask and the design drawing is visually represented by using the color difference.

In this embodiment, the detection machine measures the 3D size and form and position tolerance of the car body mask according to the collected data.

By utilizing the three-dimensional measurement method, the three-dimensional model of the car body mask to be detected can be quickly and accurately obtained, and then the required detection result can be obtained by inputting the design drawing in the detection machine. Compared with the traditional detection mode, the measurement method can quickly and accurately obtain the detection result of the workpiece with the complex structure, is convenient for data backup and filing, and effectively reduces the measurement error.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.