Thrust and impulse measurement system and method based on light polarization state measurement

Abstract

The invention discloses a thrust and impulse measurement system and method based on light polarization state measurement. The system comprises a polarization state generating module, a cantilever beamloading module, a polarization state measuring module and a calculation processing module, wherein the polarization state generating module comprises a laser light source and a linear polarized lightgenerating module; the cantilever beam loading module is arranged at the rear part of the polarization state generating module, a thruster is used for loading a cantilever beam, the laser light source emits a light source and generates linear polarized light through the linear polarized light generating module, the linear polarized light perpendicularly penetrates through the cantilever beam, andan optical signal of emergent light received by the polarization state measuring module is converted into an electric signal; the calculation processing module is connected with the polarization state measuring module, and the electric signal is subjected to numeralization to obtain a thrust value. The system is high in response degree, simple in structure, high in precision and not likely to beinterfered by the external world, can achieve thrust and impulse integrated measurement, solves the problems that in the prior art, zero drift exists, a balance position is not stable, calibration isdifficult and the precision is low, and is high in practicability.

Description

Technical field: [0001] The invention relates to a thrust impulse measurement system and a measurement method based on light polarization state measurement, and relates to the technical field of micro thrust / micro impulse measurement. Background technique: [0002] The thrust measurement in the current engineering mostly converts the dynamic effect of the force into the rotation angle or vibration amplitude of the force measuring platform, so as to characterize the magnitude of the thrust. These measurement methods have slow response, and the measured signal is easily overwhelmed by mechanical vibration and environmental noise. Stress is also one of the mechanical characteristics of materials, as long as the material is stressed, it will produce stress. Compared with the rotation angle and vibration amplitude, the response of the stress signal is better, and the setting of "small thrust-large stress" can be realized by loading the structure, and the physical relationship be...

AI Technical Summary

Problems solved by technology

[0006] Although the measurement results of thrust and impulse at the micronewton level are acceptable, there are few methods for measuring thrust and impulse at the nanonewton level and the accuracy is not high. Integrated measurement of thrust impulse with high resolution and high precision

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