Micro-deformation field high-precision measurement system and method based on microwave metamaterial

Abstract

The invention relates to the field of solid rocket engine testing, in particular to a micro-deformation field high-precision measurement system and method based on a microwave metamaterial. Comprising an engine shell attached with a flexible dielectric material, a transmitting / receiving antenna, a microwave imaging radar, a microwave high-frequency signal collector, a microwave signal modulation / demodulation device, a data processing system, a vector analyzer, a microwave signal source, an image analysis system, an image inversion algorithm system and a twisted pair which are connected in sequence. The supernormal electromagnetic property of the microwave metamaterial is used for strain measurement of the solid rocket engine, the environmental adaptability of the device is higher, the measurement control precision is high, the influence of each link on uncertainty in the test process is smaller, and the installation operation is simpler and more convenient. The flexible metamaterial array realizes point-to-field distribution measurement, and the measurement range is large; the microwave imaging technology realizes strong environmental adaptability, and ensures that the experimental result is accurate; and through wireless microwave transmission, non-contact measurement is realized, and the working risk is reduced.

Description

technical field [0001] The invention relates to the field of solid rocket motor testing, in particular to a high-precision measurement system and method for micro-deformation fields based on microwave metamaterials. Background technique [0002] For the micro-deformation measurement of the solid rocket motor test system, Fabry-Perot interference cavity is mostly used to make fiber grating, digital image, resistance strain gauge test technology, laser speckle test technology, etc. at present. [0003] The United States has installed a fiber grating sensor network for measuring strain and temperature on the surface of the space shuttle X-33, which is used for real-time health monitoring of the stress and strain field during the vibration mode experiment of the space shuttle. Due to the influence of the structural reliability of the shell material, there is no attempt to apply it in high-speed and high-altitude flight tests. In the helicopter flight test in the real atmospheri...

AI Technical Summary

Problems solved by technology

[0011] The present invention provides a high-precision micro-deformation field measurement system and method based on microwave metamaterials to solve the bottleneck problem of complex surface stress-strain field testing

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