Precision calibration device and method of digital three-dimensional gap measurement system
A technology of three-dimensional measurement and calibration device, which is applied in the field of precision measurement, can solve the problems of changes in calibration accuracy, lack of stability and accuracy, and lack of suitable methods for accuracy calibration of digital three-dimensional measurement systems, and achieves the effect of ensuring accuracy.
Active Publication Date: 2021-06-11
XI AN JIAOTONG UNIV
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Problems solved by technology
[0005] The gap between narrow and long areas can be obtained through digital three-dimensional measurement, but there is no suitable method for the accuracy calibration of the digital three-dimensional measurement system. At this stage, the accuracy of the digital three-dimensional measurement system is still evaluated by manual measurement results. Calibration accuracy will change with the status of on-site workers, and it does not have stability and accuracy
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[0025] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0026] refer to figure 1 , a precision calibration device for a digital three-dimensional measurement system, including a platform 3, a support 2 is fixed on the platform 3, and a first flat plate 11 is connected to the upper end of the support 2; a multi-degree-of-freedom translation table 4 is fixed on the platform 3, and a multi-freedom The degree displacement table 4 is connected with a second flat plate 12, and the second flat plate 12 cooperates with the first flat plate 11;
[0027] The first flat plate 11 is fixed, and the second flat plate 12 has six degrees of freedom in space;
[0028] When performing calibration, the second plate 12 is controlled by the multi-degree-of-freedom translation platform 4 to move, and the gap value obtained by the digital three-dimensional measurement system is compared with the theoretical value, and the contr...
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The invention relates to a precision calibration device and method for a digital three-dimensional measurement system, the device comprises a platform, a support is fixed on the platform, and the upper end of the support is connected with a first flat plate; a multi-degree-of-freedom displacement table is fixed on the platform, a second flat plate is connected to the multi-degree-of-freedom displacement table, and the second flat plate is matched with the first flat plate. The first flat plate is fixed, and the second flat plate has six degrees of freedom in the space. The method comprises the following steps: during calibration, controlling the second flat plate to move through the multi-degree-of-freedom displacement table, comparing a gap value obtained by the digital three-dimensional measurement system with a theoretical value, and calibrating the gap value measured by the digital three-dimensional measurement system. According to the invention, the precision calibration of the digital three-dimensional measurement system can be realized, and the calibration result has stability and accuracy.
Description
technical field [0001] The invention belongs to the technical field of precision measurement, and in particular relates to a precision calibration device and method for a digital three-dimensional gap measurement system. Background technique [0002] Aircraft assembly is the leader, key and core of the aircraft manufacturing process. It affects all aspects of aircraft development and directly affects the final quality, manufacturing cost and development cycle of the aircraft. The wing-body butt joint assembly is one of the important links in aircraft assembly. The distribution of the wing-body assembly gap largely determines the fatigue life and reliability of the wing-body assembly. The measurement and control of the assembly gap has become a common key to the wing-body butt joint assembly process. question. [0003] The root of the difficulty in measuring the assembly clearance of wing-body joints lies in the narrow and long distribution characteristics of the assembly cl...
Claims
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Login to View More IPC IPC(8): G01B21/16
CPCG01B21/16G01B21/042
Inventor 刘红忠李映江叶国永史永胜邢宏文雷彪牛东
Owner XI AN JIAOTONG UNIV