Method for measuring rotary inertia through binocular vision

Abstract

The invention belongs to the technical field of computer vision measurement and relates to a binocular-vision-based method for quickly and accurately measuring rotary inertia. The method includes that a binocular vision system is adopted, two ultra-high-speed cameras are utilized to collect moving images of surface mark points of a measured object in real time, a graphic workstation processes image information transmitted by the two ultra-high-speed cameras to acquire moving tracks of the mark points in space, and the rotary inertia of the measured object is calculated through fitting of the tracks. Plane fitting and projection are performed on space position of the measured object at each moment by utilizing the binocular vision system, space moving coordinates of the measured object are enabled to be in a same plane, and influences, on measuring accuracy, caused by the fact that swinging motion is not in a plane are reduced; by real-time space moving coordinate curve fitting taking damping coefficients into consideration, influences, of air resistance and mechanism resistance, on accuracy of a measuring system are reduced, and measuring accuracy of the rotary inertia is improved.

Description

Technical field [0001] The invention belongs to the technical field of computer vision measurement, and relates to a fast and accurate moment of inertia measurement method based on binocular vision. Background technique [0002] Moment of inertia is a physical quantity that characterizes the inertia of a rotating object. It is one of the important parameters for studying the law of motion of a rotating object. It is necessary to accurately know the moment of inertia of a rotating object when it comes to the measurement of moving objects and the dynamics of motion. With the continuous progress of modern science and technology, the measurement of moment of inertia has been paid more and more attention, and it has become an indispensable and important component in the field of modern measurement, and it has a very important position in all fields. In the aerospace industry, artificial satellites, launch vehicles, manned spacecraft, etc. all need to modify the moment of inertia to de...

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Problems solved by technology

[0003] The patent No. CN1646971A is entitled "A Method for Measuring Moment of Inertia and Product of Inertia and Its Device". This patent uses a compound pendulum device, but the operation of the compound pendulum device is cumbersome

Patent No. CN102692264A "A Test Bench and Test Method for Mass, Center of Mass Position and Moment of Inertia" uses a torsion mechanism and a sensor installed on the mechanism to measure the moment of inertia. The sensor needs to be calibrated before measurement, and the torsion device itself The operation is complicated, making the whole measurement process very cumbersome

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