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Stokes parameter measurement-based electric propulsion field micro-thrust transient measurement system

A measurement system and micro-thrust technology, applied in the measurement of force, the measurement of force by measuring the change of the optical properties of the material when it is stressed, the measurement device, etc., can solve the electromagnetic interference of piezoelectric sensor thrusters, and cannot accurately measure thrust It can solve problems such as transient thrust value of the device, so as to achieve the effect of fast measurement speed, solving zero drift and convenient operation.

Active Publication Date: 2017-11-24
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0010] The purpose of the present invention is to provide a micro-thrust transient measurement system in the field of electric propulsion based on Stokes parameter measurement. This invention solves the problem that the existing thrust measurement method cannot accurately measure the thruster transient thrust value; Technical problems that are susceptible to electromagnetic interference from thrusters during the measurement process

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[0044] The accompanying drawings constituting a part of this application are used to provide further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention.

[0045] see figure 1 , the micro-thrust transient measurement optical path provided by the present invention includes: a laser light source, a force measuring device including a photoelastic element 3 and a split optical path.

[0046] The force measuring device includes a rigid plate 2 , a thruster 1 arranged in the center of one side facing the rigid plate 2 , and a photoelastic element 3 arranged on the other side of the thruster 1 . The laser light source is arranged facing the photoelastic element 3, and the photoelastic element 3 can be an amorphous transparent material, such as glass, celluloid, phenolic resin, epoxy resin, polycarbonate plastic, e...

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Abstract

The present invention provides a Stokes parameter measurement-based electric propulsion field micro-thrust transient measurement system. According to the present invention, by the noncontact measurement, sensors or other measurement devices do not need to be installed on a structural object directly, the mechanical vibration and the interference of a power supply cable to the thrust measurement can be reduced, and 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., are solved.

Description

technical field [0001] The invention relates to the technical field of micro-thrust measurement, in particular to a micro-thrust transient measurement system in the field of electric propulsion based on Stokes parameter measurement. Background technique [0002] At present, the domestic high-precision measurement of micro-thrust and micro-impulse of electric propulsion thrusters is relatively common thrust measurement system based on swing principles such as simple pendulum, inverted pendulum, and torsion pendulum. Among them, when the electromagnetic balance based on the inverted pendulum principle is used to measure the impulse, there is a serious zero point drift, and the instability of the 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, using a measuring device based on the principle of torsion pendulum to measure ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/24
CPCG01L1/241
Inventor 欧阳吴建军何振张宇李健何兆福
Owner NAT UNIV OF DEFENSE TECH
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