13results about How to "Control accumulation" patented technology

The invention discloses a tunnel central axis rapid extraction method based on point cloud data, and belongs to the technical field of tunnel engineering. According to the method, technologies such as global principal component analysis, local segmentation processing, RANSAC robust fitting and spline interpolation are innovatively combined, comprehensive analysis of the overall structure and local details of the tunnel is achieved, an efficient local splicing strategy is innovatively provided, the data processing amount is effectively reduced, the algorithm efficiency is improved, and the method is suitable for large-scale popularization and application. Segmentation processing and elliptic cylindrical surface model fitting are innovatively adopted, and adaptability to complex tunnel shapes is improved. According to the method, many limitations in the prior art are overcome, local features and global features are concerned at the same time, and a more efficient, more accurate and more reliable solution is provided for extraction of the central axis in tunnel engineering.

The invention relates to the technical field of sensor calibration, in particular to a weighing sensor calibration method based on a neural network. The method comprises the following steps: firstly, carrying out normalization processing on obtained data of a weighing sensor; secondly, initializing parameters of ELM (Extreme Learning Model) and Adam; then, an Adam algorithm is used for optimizing the weight and the threshold value from an ELM hidden layer to an output layer, and the optimized weight and the optimized threshold value are stored; and finally, inputting test set data into the trained model, and after output is obtained, carrying out anti-normalization operation on the output so as to realize the calibration work of the weighing sensor. By means of the method, the convergence performance of the optimization process can be improved, the optimization process is more stable and reliable, the precision of the calibrated weighing sensor can reach about 0.02% F.S, the weighing sensor can keep a good calibration effect under different working conditions, and the method can be suitable for calibration of sensors of different types.

The application provides a lithium-rich manganese-based material and a preparation method and application thereof. The chemical general formula of the lithium-rich manganese-based material is Li 1.2+x (Mn a Co b Ni c ) 0.8‑x O2, wherein, -0.2

The application belongs to the technical field of point cloud processing, and discloses a multi-modal semantic mapping method and system based on a master-slave architecture. The method comprises the following steps: S1, extracting feature points in point cloud data and calculating the covariance matrix of the neighborhood point cloud of each feature point; S2, solving the optimal pose corresponding to the minimum of the target function; S3, converting the obtained point cloud data into a world coordinate system using the optimal pose, fusing all frame point cloud data in the world coordinate system to form a three-dimensional point cloud map, projecting the three-dimensional point cloud map to a camera coordinate system, and inputting the three-dimensional point cloud map projected to the camera coordinate system into a semantic segmentation neural network to obtain the semantic label corresponding to each point cloud in the three-dimensional point cloud map, thereby achieving semantic mapping. Through the application, the problems of weak dynamic adaptability, insufficient model generalization ability and long-term running precision decay of the traditional three-dimensional semantic mapping method in a dynamic complex scene are solved.

The present invention discloses a method for fast extraction of the central axis of a tunnel based on point cloud data, and belongs to the technical field of tunnel engineering. The present invention innovatively combines global principal component analysis, local segmentation processing, RANSAC robust fitting, and spline interpolation technologies to achieve a comprehensive analysis of the overall structure and local details of the tunnel, innovatively proposes an efficient local splicing strategy, effectively reduces the amount of data processing, and improves algorithm efficiency. It innovatively adopts segmentation processing and elliptical cylinder model fitting to improve adaptability to complex tunnel shapes. The present invention overcomes many limitations of the prior art, while paying attention to local and global features, and provides a more efficient, more accurate, and more reliable solution for central axis extraction in tunnel engineering.

The utility model provides an aluminum profile spraying device. The aluminum profile spraying device comprises a machining box fixedly installed on the workbench, a partition plate is fixedly installed in the machining box, and the interior of the machining box is partitioned into a spraying cavity and an operation cavity through the partition plate; the humidity sensor is mounted in the operation cavity; the water tank is fixedly mounted at the top of the processing box, and a water pump is fixedly mounted in the water tank; and the water drainage pipe is fixedly installed at the top of the operation cavity, and the water drainage pipe is fixedly connected with the water drainage end of the water pump. The aluminum profile spraying device has the advantages that accumulation and release of static charges are controlled by controlling the environment humidity, and static removal treatment on aluminum profiles is facilitated.

The invention discloses an adjustable pulse waveform solid laser control method, and particularly relates to the technical field of laser control, and the method comprises the steps: building a solid laser state monitoring model through obtaining the output power information, external environment information, optical element aging information and control response information of a solid laser; the actual operation state of the solid-state laser is evaluated, potential faults and hidden dangers existing in the solid-state laser are effectively identified, and when the potential faults and hidden dangers exist in the solid-state laser, various parameters of pulses are dynamically controlled by adopting a fuzzy PID control algorithm in combination with the temperature rise rate of a heat affected area. The frequency of frequent pulse adjustment caused by the unstable operation state of the laser is effectively reduced, meanwhile, the temperature rising rate of a heat affected area is considered when pulse parameters are adjusted, heat energy accumulation is effectively controlled, excessive expansion of the heat affected area is prevented, machining defects caused by heat damage are reduced, and the defective rate is reduced.

The invention discloses a method for preparing fucoxanthin microcapsules, which belongs to the technical field of food and drug processing, and comprises the following steps: fucoxanthin, carrageenan and protein complex are mixed, and after stirring reaction, fucoxanthin lipid nanoparticles are obtained; microcrystalline cellulose is grafted and modified with succinic anhydride, and then mixed with food-grade chromium picolinate and fucoxanthin lipid nanoparticles to obtain composite fucoxanthin; composite fucoxanthin, propolis extract, white kidney bean extract, pomegranate peel extract, quercetin and tea polyphenols are mixed as core materials, and β-cyclodextrin and gum arabic are used as capsule materials to prepare microcapsules. Fucoxanthin is present in lipid nanoparticles, and the nano size can better adhere to the cell mitochondria to stimulate the mitochondrial effect; the formed microcapsules contain network structures and lipid nanoparticles inside, which can exert a strong force on the composite fucoxanthin and avoid leakage of fucoxanthin in the microcapsules.

The present invention discloses a chain-type precise quantitative feeding device for caged breeder chickens, comprising a chain feeding mechanism arranged in a trough for automatic feeding, a feed box arranged corresponding to each layer of the cage trough, a feeding mechanism for feeding the feed box quantitatively, and a feed tower for storing feed, wherein a separate receiving port is arranged on the top of each feed box, the feed tower quantitatively delivers feed to different receiving ports through the feeding mechanism, the feed box quantitatively releases feed into the trough through the chain feeding mechanism, and a blocking device for controlling the feeding time is arranged above the trough. By separately arranging a receiving port for each feed box, the feed in the feed tower is quantitatively delivered to each feed box through the feeding mechanism, and each time the feed is quantitatively fed to only one feed box corresponding to the receiving port, and then the chain feeding mechanism is used to uniformly discharge the feed and the feeding time of the blocking device is controlled, so as to realize precise quantitative feeding of the chickens.

The invention provides a variable-curvature bidirectional reverse concave type titanium alloy skin progressive hot pressing forming method, belongs to the technical field of digital intelligent skins, and solves the problems that surface quality defects such as wrinkles and cracks are prone to occurring during existing variable-curvature titanium alloy skin progressive hot pressing forming, and the forming period is long. According to the method, the optimal incremental forming times of the part are calculated through a python secondary development method, and the problem of surface wrinkles after the part is formed is effectively solved by optimizing the mold structure and improving the part hot pressing mode. And the optimal incremental forming frequency is calculated, so that the problem that the mechanical property of the part is damaged due to excessive hot pressing frequency is effectively solved, and the forming efficiency of the part is greatly improved.

The invention relates to an automatic polishing system for seat bars. The automatic polishing system comprises a rack, a fixed polishing mechanism is fixed to the rear side of the upper end of the rack, a movable polishing mechanism is fixed to the front side of the upper end of the rack, a feeding table is arranged on the left side of the rack, a discharging table is arranged on the right side of the rack, and a conveying mechanism is arranged between the feeding table and the discharging table; through the combination of the movable grinding mechanism and multi-layer transmission, the system has high flexible adaptability and can effectively treat seat bars of different shapes and sizes, a spiral shape of the arranged grinding barrel forms a heat dissipation channel, heat accumulation caused by friction and grinding can be effectively controlled, and the heat dissipation efficiency is improved. And through the design of anticlockwise spiral lines of a second grinding barrel in the movable grinding mechanism and a heat dissipation channel, the grinding temperature is reduced, excessive heating is prevented, and efficient and stable operation of the system is ensured. The device achieves remarkable achievements in the aspects of improving the production efficiency, optimizing the surface quality, reducing the energy consumption, improving the system stability and the like, and an advanced and reliable solution is provided for the production process of the seat manufacturing industry.

This utility model provides a turning tool device for notched sample machining, including an indexable insert, a tool holder, and a screw. The indexable insert and the tool holder are fixedly connected by the screw. The tool holder is a CNC external turning tool straight head tool holder, with a diamond-shaped insert mounting groove at the head. A threaded hole that mates with the screw is located in the center of the insert mounting groove. The indexable insert has a central through hole coaxial with the threaded hole in the middle. The insert is replaced and fixed by screwing through the screw and screwing it into the tool holder.

The invention relates to a diglyceride composition beneficial to maintaining the healthy level of blood fat and a preparation method of the diglyceride composition. According to the diglyceride composition disclosed by the invention, the diglyceride composition is formed by compounding a plurality of greases and nutritional ingredients with the diglyceride, and the diglyceride composition has the effects of maintaining the healthy level of blood fat and preventing cardiovascular diseases, and also can effectively achieve the effect of supplementing nutrition. Wherein the contained nutritional ingredients can meet the requirements of human bodies, so that the requirement of eating high-calorie food is reduced, fat accumulation is effectively controlled, and meanwhile, the effect of reducing blood fat is achieved. In the preparation process, catalytic reaction, homogeneous mixing and spray powdering are adopted, and finally the powdery diglyceride composition is obtained and is convenient to eat and can be absorbed by a human body.