Rocket propellant liquid level optical measurement method based on double-radius solution

Abstract

The invention provides a rocket propellant liquid level optical measurement method based on double-radius solution, which comprises the following steps: mounting a camera at the top of a storage tank, enabling the visual axis of the camera to coincide with the axis of the storage tank, and shooting the liquid level of a rocket propellant to obtain a propellant liquid level image; in propellant liquid level imaging, firstly, a radius O 'A'is selected to calculate the liquid level height, then a radius O' B'forming an included angle pi with the radius O 'A' is introduced, an intermediate parameter h is eliminated, and finally, the propellant liquid level height is obtained according to the lengths R1'and R2 'of the O' A 'and the O' B '. Liquid level height measurement is carried out through any two radiuses with the included angle being pi in the liquid level image obtained by the camera, the obtained liquid level measurement result is not affected by liquid level inclination, does not contain an angle parameter theta, is more suitable for the real rocket flight working condition, can remarkably improve the liquid level measurement precision, facilitates further optimization of the rocket carrying capacity, and is suitable for popularization and application. The rocket overall performance is improved. And the method is simple, feasible and easy to realize.

Description

technical field [0001] The invention relates to the technical field of measurement and testing, in particular to an optical measurement method for liquid level of rocket propellant based on double-radius calculation. Background technique [0002] The precise measurement technology of propellant liquid level is of great significance to improve the carrying capacity of rockets. Accurate real-time measurement of the propellant liquid level in each storage tank under the working state of the rocket engine can adjust the mass flow of oxidant and fuel, ultimately greatly reducing redundant propellant dosage, optimizing the rocket's carrying capacity, and improving the overall performance of the rocket. And provide a reference for optimizing the combustion mixture ratio and the initial filling amount of oxidant and fuel for subsequent launch missions. [0003] Liquid hydrogen, liquid oxygen, and liquefied natural gas (LNG) have been widely used in domestic and foreign launch vehic...

AI Technical Summary

Problems solved by technology

[0008] The present invention aims to solve the problem of liquid level height measurement when the liquid surface of the rocket propellant storage tank is inclined, and provides a rocket propellant liquid level optical measurement method based on double-radius solution, using any two included angles in the liquid surface imaging as The radius of π is used to calculate the liquid level height. The advantage is that the liquid level measurement result obtained by the double radius calculation method is not affected by the liquid surface tilt. This method has important guiding significance for improving the optical measurement accuracy of the liquid level on the arrow.

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