Sliding block type parallel mechanism for measuring space six-degree-of-freedom movement

Abstract

The invention relates to a sliding block type parallel mechanism for measuring space six-degree-of-freedom movement. Two groups of left and right parallel guide rails (1) are fixed on a stand (8), a grating ruler (10) is arranged beside each group of the guide rails (1), a sliding block (2) is arranged at the front part, the middle part and the rear part of each group of the guide rails (1) respectively, a lower spherical hinge (7) and a grating ruler reading head (9) are installed on each sliding block (2), a moving platform (4) is arranged above the stand (8), upper spherical hinges (6) are all installed at four corners of the moving platform (4), an inclined plate (4a) is connected to the center of the rear side of the moving platform (4), another two upper spherical hinges (6) are also installed on the inclined plate (4a), and the six upper spherical hinges (6) are respectively connected with corresponding lower spherical hinges (7) by pull rods (3). The sliding block type parallel mechanism has the characteristics of good rigidity, simple structure, good flexibility, wide range, and the like. With the adoption of the sliding block type parallel mechanism, six-degree-of-freedom can be measured at the same time, the problems of environment, coupling, and the like can be solved, and the measuring precision and the efficiency can be improved.

Description

technical field [0001] The invention relates to a slider-type parallel mechanism for measuring six-degree-of-freedom motion in space, which is used for dynamic measurement of mechanical motion with six-degree-of-freedom in space for moving objects. The six degrees of freedom include: three degrees of freedom movement displacements x(t), y(t), z(t) and three degrees of freedom movement angles θx(t), θy(t), θz(t). Background technique [0002] Various industries, such as industry, military and aerospace, have higher and higher requirements for the measurement accuracy of object space motion, and the working environment is becoming more and more complex. The original measurement methods can no longer meet the requirements. [0003] For example, when the rocket (missile) is launched, a series of reasons such as large thrust, strong impact, high temperature and high pressure, and air waves caused by the launch make the launch device in a harsh environment, and the initial disturb...

AI Technical Summary

Problems solved by technology

If measuring the displacement and angle of the same moving object, the two sensors are not easy to install

There is a non-contact measurement method based on multi-eye machine vision that can realize the measurement of six degrees of freedom in space, but the system is complex and has high requirements for the surface, size and measurement environment of the measured object

Except for the multi-eye machine vision measurement method, other methods cannot accurately and simultaneously obtain the measurement value of the six-degree-of-freedom movement in space

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