Ion thruster grid corrosion measurement system based on focusing distance measurement mode

Abstract

The invention provides an ion thruster grid corrosion measurement system based on a focusing distance measurement mode. The measurement system comprises a coaxial light source, a high-precision movingmodule, an industrial camera and a low depth-of-field microscope lens. The low depth-of-field microscope lens is installed on the industrial camera. The coaxial light source is installed on the low depth-of-field microscope lens. The industrial camera is arranged on the high-precision moving module. For the structural specialty of an ion thruster grid assembly, the invention provides a suitable measurement system, a technical problem of detecting a distance between an acceleration grid and a deceleration grid and an accelerated grid corrosion depth is effectively solved, the measurement system is simple and has the advantages of easy and flexible use, economic applicability and high measurement efficiency, the measurement accuracy reaches 5 micrometers, and the system can be used to distance measurement of serial ion thruster grid assemblies and other similar products and has outstanding substantive features and significant progress.

Description

technical field [0001] The invention belongs to the field of measurement technology, and relates to an ion thruster grid corrosion measurement system based on a focusing distance measurement method; it is especially suitable for measuring the corrosion of the ion thruster acceleration grid, and the two layers of the acceleration grid and the deceleration grid. distance between. Background technique [0002] Ion thrusters are thrusters used in advanced space vehicles. Compared with traditional chemical thrusters, they have the characteristics of high specific impulse and long life. They are mainly used in the position maintenance and orbit transfer of communication satellites, the main advance tasks. After the application of ion thrusters to the spacecraft, it can significantly reduce the amount of propellant carried and increase the payload, which can bring significant economic benefits, and at the same time greatly improve the comprehensive technical level of the spacecraf...

AI Technical Summary

Problems solved by technology

The first and second are based on laser triangulation. Due to the occlusion of the first layer of deceleration grid, the area that can detect the second layer of acceleration grid is very small, and the conventional measurement accuracy can only reach 0.02mm accuracy, while The investment cost of laser measurement that can reach u-level is too high, most of which are more than one million yuan; the third and fourth types of incident light angles and shooting angles have a certain angle, and there are also large dead angles in the shooting area, and the measurement accuracy is only 0.02mm

The current methods all have the problems of large measurement dead angle and poor measurement accuracy.

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