Six-degree-of-freedom motion platform device for pose measurement and calibration

Abstract

The invention discloses a six-degree-of-freedom motion platform device for pose measurement and calibration. The device comprises a first hexagonal frame assembly, a rotating assembly in spherical hinge with the first hexagonal frame assembly, a dovetail groove upper sliding plate assembly in meshed connection with the rotating assembly, a cross-shaped sliding table lead screw motor assembly fixedly connected with the dovetail groove upper sliding plate assembly, a second hexagonal frame assembly fixedly connected with the cross-shaped sliding table lead screw motor assembly, anda stay wire displacement sensor fixed on the second hexagonal frame assembly. The rotating assembly comprises a supporting frame, a Y-axis shifting fork, an X-axis shifting fork, a Y-axis pointer, an X-axis pointer and an orthogonal spherical hinge, wherein the Y-axis shifting fork and the X-axis shifting fork are arranged on the supporting frame, the Y-axis pointer and the X-axis pointer are fixedly connected with the Y-axis shifting fork and the X-axis shifting fork respectively, the orthogonal spherical hinge is arranged in the middle of the supporting frame, and the Y-axis shifting fork and the X-axis shifting fork are concentrically matched with the orthogonal spherical hinge. According to the device, single-degree-of-freedom translation or rotation is realized by a compound motion decoupling method, so that the functions of real-time measurement and calibration are achieved.

Description

technical field [0001] The invention relates to the technical field of measuring instruments, in particular to a six-degree-of-freedom motion platform device for pose measurement and calibration. Background technique [0002] With the rapid development of my country's economy, the number of railway lines is increasing day by day, not only the demand for passenger and cargo trains is increasing day by day, but also higher requirements are put forward for the high speed, safety and comfort of passenger trains and the heavy load, stability and environmental protection of freight trains. Therefore, it is necessary to develop a test bench that can accurately reproduce the running posture of the train on the actual line. Measuring the spatial motion attitude of moving objects plays a vital role in the test bench. Similarly, space docking of spacecraft in the field of aerospace involves a common point - the problem of space pose measurement. The existing pose measurement technolog...

AI Technical Summary

Problems solved by technology

The patent "a test bench calibration device" (utility model, Fu Shichuan, 20160914) provides a calibration device based on the Stewart platform. Although it can perform comprehensive calibration on the test bench, the installation is complicated and the cost is high. The movement is a compound movement, and the calibration function cannot be realized by decoupling the movement

Domestic and foreign scholars' research on the six-degree-of-freedom platform is mostly based on the six-degree-of-freedom measurement device of the Stewart platform. The movements of these devices are compound movements, and the strong dynamic coupling factors of the space six-degree-of-freedom platform itself are not considered.

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