A system and method for dynamic measurement of micro-displacement caused by laser impulse coupling

Abstract

The invention brings forward a dynamic measurement system and method of infinitesimal displacement caused by laser impulse coupling. The method comprises: according to a Hall electromagnetic effect principle, a linear hall sensor as a signal detector is used for measuring micron-grade infinitesimal displacement during the laser impulse coupling process based on combination with compound pendulum; the infinitesimal displacement of the compound pendulum is converted into an electric signal by the linear hall sensor and the signal is shown by an oscilloscope; data obtained by the oscilloscope are analyzed to obtain target material displacement caused by the laser impulse coupling as well as cycle information and then obtain information containing a target material speed and acceleration distribution and the like, thereby obtaining impulse coupling information of the target material. According to the invention, extraction of infinitesimal displacement, speed, and acceleration information of solid target material due to the impulse coupling can be realized. The method is simple and effective; the measurement system is compact and simple; and adaptability is high.

Description

Technical field [0001] The invention belongs to the technical field of electromagnetic detection, and specifically relates to a dynamic measurement system and method for micron-level micro-displacement caused by impulse coupling during the action of laser and target material. Background technique [0002] Compared with traditional chemical fuel propulsion and electric propulsion, laser propulsion technology has attracted wide attention from experts and scholars from various countries due to its large specific impulse, low cost, high reliability, low pollution, easy control and other characteristics and broad application prospects. It is expected to be used in the removal of debris and other space debris, the orbit change and attitude adjustment of aircraft, the launch of micro-satellites in low-Earth orbit, and deep space exploration flights. Impulse coupling, as the essence of laser propulsion, characterizes the coupling and transfer of force in the process of interaction betwee...

AI Technical Summary

Problems solved by technology

However, using this method to obtain the dynamic motion process of the target requires a high-speed camera with a high frame rate, which is expensive and has poor detection effect on small displacements.

The second is to use optical methods such as interference method and optical lever method. Although these methods have fast response to small displacement measurement and high precision, the analysis and processing in the later stage are complicated, the repeatability of the experiment is low, and the optical path is complex and huge.

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