A grid spacing measurement method and measuring tool for ion thruster grid assembly

Abstract

The invention discloses a grid interval measurement tool for an ion thruster grid electrode assembly. The measurement tool is composed of a stepped shaft type plug gauge with different detection segment lengths, wherein the stepped shaft type plug gauge is made of conductive metal material, the stepped shaft type plug gauge is divided into a handle segment and detection segments by the steps in the stepped shaft type plug gauge, the diameter of each detection segment is larger than the hole diameter of an accelerating grid electrode and smaller than the hole diameter of a screen grid electrode, and the diameter of the handle segment is larger than the hole diameter of the screen grid electrode. The invention further provides a measurement method. The special plug gauge is inserted in a screen grid electrode hole, and the grid electrode interval of the detected grid electrode assembly is judged according to whether the front end face of the special plug gauge makes contact with the accelerating grid electrode or not; in the detecting process, a multimeter is adopted for detecting whether the screen grid electrode and the accelerating grid electrode are electrically connected or not so that whether the front end of the special plug gauge makes contact with the accelerating grid electrode or not can be judged. The grid interval measurement method and the measurement tool for the ion thruster grid electrode assembly effectively solve the technical problem about detection of the interval between grid electrodes in the spherical surface area of the grid electrode assembly on the basis of the characteristic of the ion thruster grid electrode assembly.

Description

technical field [0001] The invention relates to a method for detecting the assembly distance of special parts, in particular to a method and a measuring tool for measuring the distance between the grids in the spherical area of ​​the ion thruster grid assembly. Background technique [0002] Ion thrusters are thrusters for advanced space spacecraft applications. Compared with traditional chemical thrusters, they have the characteristics of high specific impulse and long life. They are mainly used in position maintenance and orbit transfer of communication satellites, 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 spacecraft. The grid component is the core component of the ion thruster product. Its function is to extract and accelerate t...

AI Technical Summary

Problems solved by technology

[0004] The existing detection technology can only realize the grid spacing detection in the edge area of ​​the gate (the gate edge is a plane), and the detection of the grid spacing in the spherical area of ​​the grid assembly cannot be realized by the existing detection technology because of the particularity of the gate assembly structure , standard measuring tools and instruments cannot realize the detection of grid spacing

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