6results about How to "Reduce fading" patented technology

The application provides a model airplane handle. In operation, the first driving assembly and / or the second driving assembly are controlled to move, and the rolling fit between the connecting ball part and the driving torque is converted into the rotation of the ball part around the ball center of the half-ball groove, so that the spatial angle of the antenna relative to the shell is continuously changed (the independent adjustment of the azimuth and the pitch can be correspondingly realized). By providing the spherical rotation pair and the orthogonal driving inside the handle, the antenna can be adjusted in real time without changing the holding posture, so as to adapt to the rapid change of the position and the posture of the model airplane in the urban environment. The model airplane direction can be actively aligned and the polarization matching can be optimized, so that the link fading caused by the shielding and the multipath is reduced, the stability and the effective distance of the control link are improved, and the risk of packet loss and loss of control is reduced.

The utility model discloses protective safety laminated glass for buildings, which comprises a window frame, glass plates and rapping bars, the glass plates in double-layer design are erected on the inner wall of the window frame, a partition plate is mounted at one corner of the window frame, the rapping bars are arranged on the window frame along the inner side of the partition plate, and the rapping bars are distributed along the corners of the glass plates. A knocking head penetrates into one end of the knocking rod, a connecting plate is movably connected to the outer wall of the end, along the knocking head, of the knocking rod, and a first connecting shaft and a second connecting shaft penetrate into the two ends of the connecting plate correspondingly. When the protective safety type laminated glass for the building is used, the double-layer glass plate breaking structure adopts a first-level lever structure design, the requirement of a user for breaking the whole double-layer glass plate is met, convenience is brought to people who escape from or rescue a room subsequently, the double-layer glass plate breaking structure serves as a prevention structure, a good safety protection effect is achieved, and the service life of the double-layer glass plate is prolonged. The situation that the double-layer glass plate is difficult to break due to disasters is reduced, and convenience is brought to follow-up rescue or escape.

The present application relates to the field of optical fiber sensing, in particular to a kind of optical cable icing monitoring method and device.Mainly include: obtaining the first sensing data sequence in each sensing period, according to the first sensing data sequence, obtain the phase data sequence in each period;According to the phase data sequence, obtain the frequency spectrum data of the corresponding position phase change, according to the average value of the frequency spectrum data in multiple sensing periods, obtain the characteristic frequency, and estimate the icing thickness of the optical cable according to the change of the characteristic frequency.The present application reduces the interference fading of signal and environmental random noise, improves the single-span distance of icing monitoring, and can improve the icing monitoring accuracy.

The utility model relates to the technical field of PVC (polyvinyl chloride) floors, and discloses an antiskid wear-resistant PVC outdoor floor which comprises a PVC base layer and a surface layer, a supporting bottom layer is arranged at the bottom end of the PVC base layer, a reinforcing grid layer used for increasing the structural rigidity of the PVC base layer is arranged between the PVC base layer and the surface layer, and an ultraviolet curing layer is arranged on the surface layer. Heightening pads are fixedly connected to the periphery of the bottom end of the supporting bottom layer, the supporting bottom layer comprises a base stabilizing layer fixedly connected to the bottom end of the PVC base layer, a plurality of reinforcing ribs are arranged in an inner cavity of the base stabilizing layer, a plurality of supporting rods are fixedly connected to the bottom end of the base stabilizing layer, and a plurality of buffer columns are arranged among the reinforcing ribs; rigid supporting and impact absorbing performance of the floor are improved through the reinforcing ribs and the buffer columns, meanwhile, the distance between the floors is increased through the heightening pads and the supporting rods, the drainage effect is improved, and the situation that due to the fact that the floors are irradiated by sunlight, the surfaces of the floors fade, deform or age is avoided through the ultraviolet curing layers and the reinforcing grids.

The utility model relates to the technical field of kit, concretely to a kind of ammonia nitrogen reagent is with rapid quantitative kit, including box, support seat, color card, limit frame, protective plate and connecting mechanism, the support seat is set in the box bottom, the support seat is equipped with several, the box top center is equipped with liquid inlet assembly, the box one side bottom is equipped with liquid outlet assembly, the limit frame is set in the box front one side, the box front other side is equipped with observation window, the color card is located in the limit frame interior, the color card top is connected with electromagnet one end, electromagnet other end adsorbs the limit frame inner wall, the protective plate is connected with the limit frame by the connecting mechanism, the connecting mechanism includes sliding slot, fixed block, limit block, bearing, electric push rod and limit plate, the sliding slot is opened in the limit frame inner wall, a kind of ammonia nitrogen reagent is with rapid quantitative kit of the utility model, solve the problem that current equipment protection effect is poorer.

This application relates to the field of concrete technology, specifically disclosing a fair-faced concrete and its preparation method. The raw materials for fair-faced concrete include cement, fly ash, mineral powder, glass powder, sand, reinforcing coarse aggregate, water, water-reducing agent, defoamer, and pumping agent; the preparation method is as follows: (1) cement, fly ash, mineral powder, glass powder, sand, and reinforcing coarse aggregate are added to a mixer and mixed evenly; (2) water, water-reducing agent, defoamer, and pumping agent are added to the mixer and mixed evenly to obtain fair-faced concrete. The fair-faced concrete of this application has the characteristics of high strength and high fluidity. Therefore, the vibration step is omitted during the construction and pouring process, greatly shortening the construction cycle, reducing the possibility of operational errors, and reducing rework costs.