Deformation simulation system and measurement method of high-speed moving target based on scanning galvanometer

Abstract

The present invention discloses a high-speed motion target deformation simulation system based on a scanning galvanometer and a measurement method thereof, belonging to the technical field of high-speed motion target deformation measurement. The system comprise a Fresnel uniform lighting first-stage sub system, a galvanometer scanning first-stage sub system, a receiving collection first-stage subsystem, a laser, a collimation and beam expanding module, a reflecting screen, a laser distance measurement instrument, a power source and a high-speed motion target. The Fresnel uniform lighting first-stage sub system, the galvanometer scanning first-stage sub system and the collimation and beam expanding module are employed to perform cooperative work and uniform light beam expansion and secondary amplification to achieve wide-field uniform light illumination of the high-speed motion target. The present invention further discloses a measurement method of high-speed motion target deformationbased on the scanning galvanometer based on the system. The high-speed motion target deformation simulation system based on a scanning galvanometer and the measurement method thereof can simulate thehigh-speed motion target deformation process and can achieve the accurate measurement of the high-speed motion target mini-deformation size, and can be applied to the fields such as high-speed wearingamount test, high-temperature deformation test and high-pressure form test.

Description

technical field [0001] The invention belongs to the technical field of deformation measurement of a high-speed moving target, and in particular relates to a deformation simulation system and a measurement method of a high-speed moving target based on a scanning galvanometer. Background technique [0002] Deformation is a physical change caused by the influence of external temperature, pressure, friction, corrosion, etc. under specific or abnormal conditions, such as changes in size and shape. It is an intuitive reflection of the interaction between the target and the outside world. Therefore, deformation measurement is a key indicator for understanding the target state, judging whether the target is reliable and up to standard, and is an important way for people to understand the relationship between the target and the environment. Static target deformation measurement, from macroscopic to microscopic, is realized by means such as physical calipers, optical coherence, biolog...

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Problems solved by technology

[0003] Traditional static or low-speed target deformation measurement often relies on physical contact or optical telephoto, large depth of field, and short exposure to eliminate measurement errors caused by long-distance, shaking, and movement as much as possible. For example, CN104215193A of Beijing Information Technology University Patent No. "Method and System for Measuring Object Surface Deformation" proposes an optical three-dimensional shape measurement method. By collecting the three-dimensional shape data of the object surface and the laser speckle interference deformation data, the precise measurement of the deformation data of a certain curvature object surface is realized. and correction, but it takes a long time to collect the surrounding data of the target, and it is difficult to achieve real-time measurement; for example, the CN108317965A patent of Beijing Institute of Aerospace Control Instruments "A Measuring Deformation Structure and Method with Fiber Bragg Grating" proposes a single optical fiber The method of multi-point engraving grating realizes multi-point detection of a single optical fiber, and realizes deformation measurement of beam structures such as bridges and aircraft wings, which is difficult to achieve high-speed target micro-deformation measurement

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