53results about How to "No occlusion" patented technology

A primary mirror mechanism that can be deployed with a large caliber in space relates to a primary mirror mechanism. At present, the large-aperture deployable optical primary mirror in space is complicated and cumbersome due to the complicated structure, which makes it difficult to realize the simultaneous deployment of various components during the deployment process, and the deployment accuracy is low, and the problem of shading is prone to occur at the same time. In the present invention, N groups of block mirror bodies are evenly arranged around the linkage device, and the unfolding locking device includes N first hinges, N second hinges, N third hinges and N fourth hinges, The tops of two adjacent groups of block-type mirror bodies are connected by a first hinge, and the bottoms of two adjacent groups of block-type mirror bodies are connected by a second hinge. Each group of block-type mirror bodies includes two Mirror, the two sub-mirrors are arranged side by side, the tops of the two sub-mirrors are connected by a third hinge, the bottoms of the two sub-mirrors are connected by a fourth hinge, and the N group of block mirrors are folded and closed by unfolding the locking device. Expand the action. The invention is used in the aerospace field.

The invention relates to a dynamic target position and attitude measurement method based on monocular vision at the tail end of a mechanical arm and belongs to the field of vision measurement. The method comprises the following steps: firstly calibrating with a video camera and calibrating with hands and eyes; then shooting two pictures with the video camera, extracting spatial feature points in target areas in the pictures by utilizing a scale-invariant feature extraction method and matching the feature points; resolving a fundamental matrix between the two pictures by utilizing an epipolar geometry constraint method to obtain an essential matrix, and further resolving a rotation transformation matrix and a displacement transformation matrix of the video camera; then performing three-dimensional reconstruction and scale correction on the feature points; and finally constructing a target coordinate system by utilizing the feature points after reconstruction so as to obtain the position and the attitude of a target relative to the video camera. According to the method provided by the invention, the monocular vision is adopted, the calculation process is simplified, the calibration with the hands and the eyes is used, and the elimination of error solutions in the measurement process of the position and the attitude of the video camera can be simplified. The method is suitable for measuring the relative positions and attitudes of stationery targets and low-dynamic targets.