3results about How to "Increase encoding capacity" patented technology

This invention discloses a method for encoding structured light patterns, a structured light projection module, and a three-dimensional measurement system, belonging to the field of optical measurement. Addressing the problem of fixed and inaccurate structured light encoding units in existing methods, this invention provides a method for encoding structured light patterns. The method divides the structured light pattern into multiple types of grid units, forming a grid encoding group with a predetermined number of consecutively arranged grid units. The grid encoding group is encoded based on the type of each grid unit, ensuring that each grid encoding group has a unique and non-repeating code. The code of the grid encoding group maps to its spatial position within the structured light pattern. Decoding includes acquiring the structured light pattern, determining the type of each grid unit, and matching the grid encoding group with the encoding set to obtain its position. This invention achieves flexible, high-density, and highly occlusion-resistant absolute position encoding by uniquely and non-repeating grid encoding groups composed of multiple consecutive grid units, making it suitable for high-precision three-dimensional measurement.

The application provides a quantum dot magnetic fluorescent encoding microsphere and a preparation method thereof. The quantum dot magnetic fluorescent encoding microsphere comprises a parent sphere, N layers of child spheres on the surface of the parent sphere; N is an integer greater than 1; each layer of child sphere only contains quantum dots of one wavelength, and different layers of child sphere contain quantum dots of different wavelengths; the child sphere is connected with the parent sphere through a chemical covalent bond formed by the reaction of carboxyl and amino, and the child sphere is connected with the child sphere of the adjacent layer through a chemical covalent bond formed by the reaction of carboxyl and amino; the synthesis of the child sphere is achieved by taking mesoporous silica nanospheres or solid silica nanospheres as templates, loading quantum dots on the surface of the templates, and then coating silica to obtain the child sphere; the quantum dots of each layer of child sphere are the same, the N layers of child sphere contain m kinds of quantum dots, and m is less than or equal to N. The quantum dot magnetic fluorescent encoding microsphere has a smaller variation coefficient and a higher encoding capacity.

This invention discloses a surface acoustic wave (SAW) tag structure using a single mask and its encoding and recognition method. All coded tags are made using the same mask, and the tag is encoded by different external capacitors. The SAW tag includes multiple pairs of reflective gratings. Each pair consists of a reference reflective grating and a load reflective grating with an external load capacitor. The capacitance value of the load capacitor has multiple options, corresponding to the possible codes for each reflective grating pair. Since the reflectivity of the load reflective grating changes with the external capacitor, the encoding value of the reflective grating pair is obtained by the amplitude ratio of the two echo pulse signals corresponding to the load reflective grating and the reference reflective grating, and the encoding of the SAW tag is finally identified. The advantages of this invention are that it requires only one mask and can dynamically expand the encoding capacity. Its recognition method not only eliminates the influence of distance but also avoids the coupling effect between the encodings of different reflective grating pairs.