High-speed motion target deformation measurement system and method based on DMD

Abstract

The present invention discloses a high-speed motion target deformation measurement system and method based on DMD, and belongs to the technical field of high-speed motion target deformation measurement. The system comprises a laser, a collimation and beam expanding module, a DMD scanning first-grade sub system, a projection screen, a reflection plate, a receiving detection first-grade sub system and a laser distance measuring instrument; and the DMD is employed to simulate a high-speed motion target with an unchanged position through adoption of a modulation pattern high-frequency loading mode, the optical path structure and parameters are fixed through adoption of a mode of system calibration and deformation measurement of the high-speed motion target with an unchanged simulation position, and a linear array CCD sampling frequency is employed to coordinate with the DMD frequency to achieve the target size intensity-pixel collection to achieve the data collection of the external physical deformation quantity of the high-speed motion target. The present invention further discloses a target deformation measurement method based on the system. The high-speed motion target deformation measurement system and method based on DMD can achieve the non-contact accurate measurement of the external physical deformation quantity of the high-speed motion target, and are high in measurement precision and fast in time.

Description

Technical field [0001] The invention belongs to the technical field of high-speed moving target deformation measurement, and particularly relates to a DMD-based high-speed moving target deformation measurement system and method. Background technique [0002] In recent years, as the country's industrialization level continues to rise, the field of precision engineering measurement requires a high-level evaluation system with the advantages of large measurement range, high accuracy, and good dynamic measurement characteristics. Precision / ultra-precision processing technology has become the main development direction and important research field of advanced processing and manufacturing technology. It integrates the latest scientific and technological achievements in different disciplines such as mechanical technology, measurement technology, modern electronic technology and computer technology. Applications in high-tech fields such as medicine, communications, and microelectronics a...

AI Technical Summary

Problems solved by technology

Common measurement methods include contact measurement and non-contact measurement. Although the traditional contact measurement method has strong versatility (no special requirements for the material and color of the measured object), high precision (usually up to micron level), Effective and reliable, etc., have been widely used in advanced manufacturing and scientific research, but there are also inherent limitations, such as: the contact between the probe and the surface of the workpiece is easy to cause scratches on the surface of high-precision devices, and it is impossible to measure the moving workpiece; The small vibration of the material, the softness and hardness of the material, etc. will cause measurement error problems; the shortcomings of slow measurement speed, high environmental requirements, and high cost limit its application in the field of rapid measurement.

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