Micro-thrust measurement system based on Barkhausen effect

Abstract

The invention provides a micro-thrust measurement system based on the Barkhausen effect. According to characteristics of the electric propulsion thrust as well as the inverse magnetostrictive effect (magnetism principle) and the Barkhausen effect, a thruster applies the thrust to a magnetoelastic element and then the change of Barkhausen noises is measured to obtain the change of the internal stress of the magnetoelastic element, so that the magnitude and variation of the thrust are obtained. The a micro-thrust measurement system has advantages of simple structure, great convenience in operation, high reliability, and high detection sensitivity and accuracy; the change of stress is measured in real time; and the small transient thrust of the electric thruster is measured precisely.

Description

technical field [0001] The invention relates to the technical field of stress detection, in particular to a micro-thrust measurement system based on the Barkhausen effect. Background technique [0002] The thrust generated by the electric thruster is generally small, and its magnitude is between nN and N. Although the micro-thrust of mN or N magnitude is relatively easy to measure, however, with the further reduction of thrust, the accurate measurement of micro-thrust of μN and nN magnitude becomes very difficult. For example, the thrust generated by the pulsed plasma thruster (PPT) is generally on the order of uN, and the laser micro thruster (μLPT) based on laser ablation of solid working fluid can generate thrust on the order of nN. In experimental research, it is difficult to accurately measure such a small thrust. [0003] At present, the common domestic electric thruster micro-thrust measurement systems mainly include the measurement system based on the simple pendul...

AI Technical Summary

Problems solved by technology

Although the piezoelectric sensor has a simple structure, fast response, high sensitivity and can accurately measure the change of thrust, it is susceptible to interference from electromagnetic signals during the working process of the electric thruster, resulting in inaccurate measurement results or abnormal measurement processes.

[0005] In summary, the existing measurement methods cannot accurately and real-time measure the tiny time-varying thrust generated during the operation of the electric thruster

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