Tsai parallel mechanism-based video measurement method and Tsai parallel mechanism-based video measurement instrument

Abstract

The invention discloses a Tsai parallel mechanism-based video measurement method and a Tsai parallel mechanism-based video measurement instrument, and belongs to the technical field of precision measurement. The Tsai parallel mechanism-based video measurement instrument comprises a bracket, a Tsai parallel motion module and a video sensor; the bracket comprises a base, a stand column and a staticplatform, and the static platform is connected with the base through the stand column; the Tsai parallel motion module comprises a Tsai parallel mechanism, a driving motor, a revolute pair, a drivingrod inclination angle sensor, a driven rod inclination angle sensor and a movable platform; the Tsai parallel mechanism, the driving motor and the revolute pair are fixedly connected with the static platform; the video sensor is mounted on the movable platform; the Tsai parallel mechanism comprises three sets of connecting rod mechanisms, the three sets of connecting rod mechanisms are jointly connected with the movable platform, the driving rod inclination angle sensor is installed on the driving rod, and the driven rod inclination angle sensor is installed on the driven rod. Accumulated errors do not exist, and the mechanism is high in response speed, easy to machine, high in precision and suitable for precision transmission.

Description

technical field [0001] The invention belongs to the technical field of precision measurement, and more specifically relates to a video measurement method and a measuring instrument based on a Tsai parallel mechanism. Background technique [0002] At present, the video measurement technology is mature. With the help of image processing technology and precision displacement technology, it can measure a wide range of geometric quantities with high measurement accuracy. It meets the measurement and analysis requirements of modern mechanical processing, microelectronics, semiconductors and other fields, and is widely used in scientific research. Colleges and industrial production. [0003] At present, the commonly used video measuring instruments mainly use Cartesian coordinates and spherical coordinate systems, which have strong versatility, but have the disadvantages of large series error and low rigidity. If there is a high precision requirement, the processing of traditional...

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Problems solved by technology

[0008] In view of the above defects or improvement needs of the prior art, the present invention provides a video measuring method and measuring instrument based on the Tsai parallel mechanism, thereby solving the problem of accumulated errors in the prior art, slow response speed of the mechanism, high processing difficulty, and difficulty in precision. Guarantee, technical issues not applicable to precision transmission

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