A Micro Thrust Measuring Device Based on Cam Rotation Angle Measurement

Abstract

The present invention is a tiny thrust measuring device based on cam rotation angle measurement. In the device, a rotating beam, an elastic shaft and a mounting seat are combined and connected together. The cam is installed on the rotating beam, and the center of the cam circle is located on the combined central axis of the elastic shaft and the mounting seat. , the damping plate is connected with the cam; the damping oil pool is installed on the bottom plate, and the damping plate is immersed in the damping oil pool; the displacement measuring device adopts a non-contact optical displacement measuring device, which is installed on the bottom plate, and the measuring point is on the side of the cam. The mass block is used for system parameter calibration of the measuring device. The rotation angle of the rotating shaft can be measured by using the combination of the displacement sensor and the cam. This rotation angle measurement method can measure a wide range of rotation angles, which is different from the measurement method that uses linear displacement to approximate the rotation angle.

Description

technical field [0001] The invention belongs to the technical field of devices or methods for measuring force, work, mechanical power or torque generated by impact, and relates to a micro thrust measuring device based on cam rotation angle measurement, with the international patent classification number: G01L 5 / 00. Background technique [0002] Micro-nano satellites have very broad application prospects in both military and civilian areas, and also promote the development of micro thrusters. The thrust performance of the micro thruster is usually in the tens of millinewtons, hundreds of micronewtons, or even tens of micronewtons or a few micronewtons, which places very high requirements on the measurement system. At present, in order to measure the micro thrust, many scholars have been working on the design and experiment of the micro thrust measurement system. At present, the micro-thrust measuring device based on the horizontal torsion pendulum is the most commonly used m...

AI Technical Summary

Problems solved by technology

However, the angle measurement resolution of the angle measurement sensor is low, such as the angle encoder

The resolution of the micro-thrust measurement device for the measurement of the rotation angle under the action of the micro-thrust should be able to reach μrad, which is beyond the reach of the rotation angle measurement sensor

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