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Workpiece three-dimensional dimensions automatic detection system and method based on laser scanning

A laser scanning and automatic detection technology, applied in the field of three-dimensional scanning and digital analysis, can solve the problems of low detection efficiency and low automation level, achieve strong anti-interference ability, high measurement accuracy, and improve detection efficiency

Inactive Publication Date: 2020-01-03
BEIJING INST OF CONTROL ENG
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Problems solved by technology

[0004] The technical problem solved by the present invention is: aiming at the problems of low detection efficiency and low automation level of existing workpiece measurement methods, the present invention provides a laser scanning-based automatic detection system and method for three-dimensional dimensions of workpieces, which improves detection efficiency and automation level

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  • Workpiece three-dimensional dimensions automatic detection system and method based on laser scanning
  • Workpiece three-dimensional dimensions automatic detection system and method based on laser scanning
  • Workpiece three-dimensional dimensions automatic detection system and method based on laser scanning

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Embodiment

[0096] In a specific embodiment of the present invention, the laser scanning sensor scans the workpiece to obtain point cloud data including its key dimensions and position parameters, and the measurement error of the three-dimensional mobile platform is controlled within ±5 μm. The measurement error of the selected laser scanning sensor is better than ±0.02mm. The detection software denoises, simplifies, and merges the massive point cloud data obtained by the laser scanning sensor to obtain the key dimensions and position parameters of the workpiece. In the process of data processing, the lack of data, the generation of singular points and other factors will affect the accuracy of the detection results, and the error introduced by data processing is controlled within ±10 μm. During the detection process, changes in environmental factors such as temperature, humidity, air pressure, etc. will cause expansion and contraction of the measured object and the measuring device, and t...

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Abstract

The present invention provides a workpiece three-dimensional dimensions automatic detection system and method based on laser scanning. The system comprises a three-dimensional moving platform, a three-dimensional moving platform numerical control module, a laser scanning sensor, a laser scanning sensor numerical control module, a laser scanning sensor rotating mechanism, a power module and detection software, and belongs to the technical field of three-dimensional scanning and digital analysis. According to the system, the numerical control three-dimensional moving platform is used, so that total dynamic measurement is implemented, manual movement detection is replaced, and detection efficiency is improved; a pneumatic floating slideway is used, so that movement precision is improved; thelaser scanning sensor rotating mechanism is assembled on a Z-axis pneumatic floating slideway, so that deflexion of the laser scanning sensor can be implemented, and a workpiece is scanned from different angles; and a blue line sweeping laser scanning sensor is selected, so that anti-interference is strong, and measurement precision is high.

Description

technical field [0001] The invention relates to a system and method for automatically detecting three-dimensional dimensions of workpieces based on laser scanning, and belongs to the technical field of three-dimensional scanning and digital analysis. Background technique [0002] At present, there are many types of workpieces in aerospace systems, complex structures and small batches. If its shape and position parameters are all inspected by inspectors using traditional general-purpose measuring tools such as vernier calipers and micrometers, a medium-complex workpiece needs to measure about 300 to 400 dimensions, such as wall thickness. Dimensions need to be measured at multiple locations. Skilled operators need (3-5) hours to complete, and many inspectors need to be assigned. At present, there are problems such as a large amount of workpieces, low testing efficiency, human judgment on whether it is qualified or not, untraceable quality, a large amount of manpower and mate...

Claims

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Application Information

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IPC IPC(8): G01B11/24
CPCG01B11/24
Inventor 张瀚文任伟陈爱军马桂红马德智沈小燕侯清锋卢焕然赵兰
Owner BEIJING INST OF CONTROL ENG
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