329results about How to "Proof of accuracy" patented technology

The invention provides a solar thermal collector system which comprises thermal collection tubes, a reflecting mirror and thermal collection plates. Two adjacent thermal collection tubes are connected through the thermal collection plates, and therefore a tube plate structure is formed between the multiple thermal collection tubes and the adjacent thermal collection plates. The tube plate structure is a parabolic-shaped structure or an arc-shaped structure, the bending direction of a parabola or an arc is opposite to the parabolic structure of the reflecting mirror, the focus of the tube plate structure and the focus of the reflecting mirror are on an identical point. According to the solar thermal collector system, solar energy can be taken full advantages of, losses of solar heat are avoided, and the effect of environmental protection and energy saving is achieved.

The invention discloses a large K-waveband conformal antenna array plane and aims to provide a conformal phased array antenna array plane which does not generate a frequency deviation or a relatively high derotation component, and has a good broadband wide-angle scanning gain characteristics and good broadband wide-angle scanning circular polarization characteristics. The large K-waveband conformal antenna array plane is realized through the following technical scheme: conductor patches are divided into four groups and are arranged on an upper surface of a lower dielectric substrate in a form of a quadrant sequence rotation array, and projections of feeding points of a micro-strip patch antenna on a plane plate are arranged triangularly; the conductor patches are sandwiched between an upper dielectric substrate and the lower dielectric substrate; a radio frequency coaxial connector sequentially passes through the plane plate, a metal cone and the lower dielectric substrate to jointly form the micro-strip patch antenna; the radio frequency coaxial connector carries out coaxial probe feeding on the micro-strip patch antenna; and a pair of orthogonal polarization degenerate modes which have equal amplitudes and a phase difference of 90 degrees are excited on the conductor patches to form the conformal phased array antenna array plane for radiating right-handed circular polarization electromagnetic waves.

The invention discloses a distribution transformer coil material nondestructive testing method, the detection method comprises a distribution transformer fuel tank volume discrimination method and a resistance temperature coefficient method. According to the invention, by a fuel tank volume for measuring distribution transform, compared with data in a routine fuel tank volume table, if the fuel tank volume for testing distribution transform exceeds the routine distribution transform by 30%, and the fuel tank is a suspected aluminum core transformer. The resistance temperature coefficient method is characterized in that a resistance temperature coefficient K value is measured and calculated to determine the coil material, on the basis of a distribution transform coil temperature model, the invention employs a multi-point linear regression method to inhibit random error generated in a test, and thereby the measure precision of K value can be increased. A multitime test result proves that a principle of the material detection method based on coil resistance temperature coefficient is correct, and the method is feasible. The invention is suitable for the nondestructive test of the distribution transformer material.

The invention provides a solar thermal collector system which comprises a thermal collector and a reflecting mirror. The thermal collector comprises a thermal collecting tube which is a flat tube, the flat tube is of a parabolic-shaped structure or an arc structure, the bending direction of the parabola or the arc is opposite to that of the parabolic structure of the reflecting mirror, and the focus point of the thermal collecting tube and the focus point of the reflecting mirror coincide. According to the improved solar thermal collector system, solar energy can be fully utilized, loss of solar heat is avoided, and the effect of protecting environment and saving energy is achieved.

The invention provides a solar flat plate type heat collector which comprises a box body and heat collecting pipes. A transparent cover plate is arranged on the top of the box body; a heat preservation layer is arranged at the bottom of the box body; and the heat collecting pipes are arranged in the box body. The solar flat plate type heat collector further comprises a humidity measuring device arranged in the box body and in data connection with a control system; and once liquid leaks, the liquid enters the box body, when the detected humidity is higher than a certain value, measurement data are abnormal, and the control system closes valves of liquid entering into the heat collecting pipes in time. The novel solar heat collector for automatically detecting leakage detects leakage by detecting the humidity of the heat collecting pipes.

The invention belongs to the technical field of scene segmentation in computer vision, and discloses a camouflage target image segmentation method based on information mining. The PFNet sequentially comprises a multi-layer feature extractor, a positioning module and a focusing module, wherein the multi-layer feature extractor obtains context features of different levels by using a traditional feature extraction network; the positioning module firstly uses RGB feature information to preliminarily determine the position of a camouflage target in an image; and the focusing module is used for mining information and removing interference information on the basis of the RGB feature information and the preliminary position information of the image, and finally determining the boundary of the camouflage target step by step. According to the method, the concept of interference information is introduced into a camouflage target segmentation problem, a new information exploration and interference information removal strategy is developed, and segmentation of a camouflage target image is facilitated. From the perspective of the result, the PFNet segmentation result is very excellent, and the fine degree of the camouflage target boundary is also satisfactory. Meanwhile, the method is wider in applicability.