In order to obtain the coordinates of the measured point in the body positioning coordinate system, it is necessary to use the standard coordinate system as an intermediary to convert the coordinates of the measured point in the sensor coordinate system to the measured point in the body positioning coordinate system, which requires the sensor The coordinate system and the vehicle body positioning coordinate system are combined with the standard coordinate system, which is called the mediation coordinate unified method.
This is done through the process of local calibration and global calibration. The local calibration uses the principle of lens perspective to calibrate 12 external parameters from the world coordinate system to the sensor's three-dimensional coordinate system; the global calibration uses the intermediate coordinate system scheme, and the target coordinate system is used to determine the sensor coordinate system corresponding to the measurement sensor. The transformation matrix of the theodolite coordinate system completes the unification of the coordinate system.
2. Advanced digital control system
The laser vision inspection system uses advanced CBVM measurement and control software, which can realize all functions of the inspection station through the graphical operation interface, even for unskilled operators. At the same time, the data management and analysis software is responsible for the management of measurement data and the completion of the query and analysis of measurement data by LAN users.
(1) Vehicle data query and analysis
The vehicle data query is based on the entire body and reflects the entire body.
The vehicle data query can be inquired according to the production time of the vehicle body, or can be inquired according to the number of the vehicle body. The list of query data can be sorted in a variety of ways: body number and point number, point and body number, production time and production shifts. The data is displayed in three different background colors to reflect the processing error of the measuring point.
(2) Functional size analysis
Functional size analysis is a comprehensive evaluation of multiple points in a body.
The body size produced in a certain period of time can be selected for functional size evaluation, and the body size in a certain body number segment can also be selected for functional size evaluation. The car body number, production time, and each function size are listed in the evaluation form. The display of the data in the table can be sorted according to the selected function size item, or the icon display can be selected.
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