3results about How to "Avoid network congestion" patented technology

This invention provides a data transmission method, apparatus, and system for unmanned aerial vehicle (UAV) communication. The method includes: dividing a transmission frame containing M consecutive time slots into: the first M-1 time slots as communication time slots, and the Mth time slot as a channel scanning time slot. Within the communication time slot, the UAV communication device performs bidirectional data transmission on the current operating channel k. Within the channel scanning time slot, the operating channel of the UAV communication device is switched to the scanning channel p, and channel feature scanning is performed on the scanning channel p; wherein the scanning channel p changes with the frame number, and one channel is scanned in each frame, cyclically traversing from 1 to N, where N is the total number of selectable channels. Based on the scanning information obtained from scanning all N channels in N consecutive transmission frames, the communication quality and link occupancy status of each channel are evaluated. Based on the evaluation results, a target channel is determined, and the operating channel is switched to the target channel.

This application discloses a multi-stage filtration device for inorganic pigment production, belonging to the technical field of inorganic pigment production equipment. It includes a device body, internally comprising a primary filtration unit, a secondary cyclone unit, a precision filtration unit, and a heating module. The design is novel and the device ingenious. The slurry enters the coarse filter screen through the feed inlet. A vibrating motor prevents screen clogging. After preliminary filtration, the slurry enters the cyclone chamber, where centrifugal force separates medium-sized particles. Finally, it undergoes precision filtration through a sintered filter element. The backwash pipeline periodically reverse-flushes the filter element, triggering a backwash program every two hours for 30 seconds. Before shutdown, the feed is shut off, and the backwash is run three times. This improves filtration accuracy and effectively reduces the impurity content of the finished product. The backwash design extends the filter element's lifespan and maintenance cycle. The synergistic effect of cyclone and vibration increases the throughput when processing high-viscosity slurries, greatly enhancing the device's practicality.

The invention provides a screen printing plate processing method for improving the performance of a heterojunction solar cell. The screen printing plate processing method comprises the following steps: preparing a super-hydrophobic ionic liquid / silicon dioxide / polyimide composite coating solution; preparing a super-hydrophobic ionic liquid / silicon dioxide / polyimide composite coating solution; coating the coating solution on a scraper surface of a screen printing plate, and drying; coating the film coating solution on the printing surface of a screen printing plate, attaching a film to the printing surface of the screen printing plate, and performing ultraviolet irradiation curing; after curing, the film is taken away, the printing face is washed with water, the needed pattern is formed, and the screen printing plate is manufactured. According to the method, a layer of super-hydrophobic ionic liquid / silicon dioxide / polyimide composite film is adhered to the tensioned screen, so that the performance of the screen is effectively improved, the adhesiveness of the slurry and the screen is reduced, and the use amount of the slurry is greatly reduced during printing.