Acoustic elasticity technology-based electric propulsion field micro-thrust transient measurement system

Abstract

The present invention relates to an acoustic elasticity technology-based electric propulsion field micro-thrust transient measurement system. By measuring the sonic time change caused by the stress, the system displays the stress and the distribution regularity, at the same time, adopts a high-precision measurement chip to record the sonic time, and approximatively reflects the real-time change of a thruster. The acoustic elasticity technology-based electric propulsion field micro-thrust transient measurement system of the present invention is a non-contact measurement and nondestructive measurement method, does not need to install a sensor or other measurement devices on a structural object directly, can reduce the mechanical vibration and the interference of a power supply cable to the thrust measurement, and solves the problems that by using a micro-thrust and micro-impulse measurement device frequently at present, the zero drifts, a balance position is unstable, the calibration is difficult, the precision is low, etc.

Description

technical field [0001] The invention relates to a micro-thrust measurement system, in particular to a real-time measurement system for the micro-thrust in the field of electric propulsion. Background technique [0002] At present, the domestic high-precision measurement of micro-thrust and micro-impulse of electric propulsion thrusters is more commonly based on thrust measurement systems such as simple pendulum, inverted pendulum, and torsion pendulum. Among them, when the electromagnetic balance based on the inverted pendulum principle measures the impulse, there is a serious zero point drift, and the unstable balance position of the electromagnetic balance also leads to poor measurement accuracy. Therefore, it can generally only be used for qualitative or semi-quantitative analysis. [0003] Relatively speaking, the use of torsion pendulum to measure thrust or impulse has high accuracy and sensitivity. The history of torsion pendulum can be traced back to the torsion balan...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is that for the thrust that is constantly changing with time generated by the micro thruster, traditional thrust measurement methods such as torsion pendulum and electromagnetic balance cannot measure the instantaneous thrust value of the thruster and the measurement process of the piezoelectric sensor In view of the shortcoming that the thruster is susceptible to electromagnetic interference, a transient thrust measurement system that can measure the thruster's transient thrust and record the entire process of the thruster's thrust change is proposed

Images