4results about How to "Obvious location" patented technology

The invention discloses a double-frequency tomography synthetic aperture radar three-dimensional imaging method, system and device and a medium, and the method comprises the steps: obtaining low-frequency image data and high-frequency image data of a target region through a double-frequency tomography synthetic aperture radar system, carrying out the neighborhood pixel joint processing of the low-frequency image data, obtaining a low-frequency data stack, and carrying out the neighborhood pixel joint processing of the high-frequency image data; performing neighborhood pixel joint processing on the high-frequency image data to obtain a high-frequency data stack; based on a dual-frequency tomography principle, fusing the low-frequency data stack and the high-frequency data stack to obtain a dual-frequency data stack; performing dual-frequency joint solution on the dual-frequency data stack by adopting a distributed compressed sensing algorithm to obtain an elevation scattering coefficient vector; and generating a three-dimensional point cloud according to the elevation scattering coefficient vector to obtain a three-dimensional image of the target area. According to the method provided by the invention, the required flight frequency can be reduced, the position of the scatterer can be effectively highlighted, and the accuracy of solving the ambiguity in the elevation direction is greatly improved.

According to the relay, when a first contact part and a second contact part are separated from each other or make contact with each other to generate an electric arc, a magnetic field formed by a first permanent magnet can play a traction role on the electric arc, and the arc blowing and arc discharging effects are achieved. The electric arc moves along the contact surface, and when the electric arc moves to the arc isolating groove, the arc isolating groove can play a role in isolating, lengthening and blocking the electric arc, so that the arcing time is shortened. Therefore, the defects that the electric arc ablates the inner cavity and causes relay explosion and the like can be effectively avoided, the product performance can still be ensured even under the condition of high load, and the product failure probability can be reduced. And meanwhile, the first contact part is synchronously contacted with the at least two sheet units, and the first contact part and the second contact part have at least two contact points, so that the shunting effect is achieved, the contact resistance can be reduced, the contact stability and reliability can be improved, and the temperature rise can be reduced.

The application discloses an antenna signal adjusting method applied to a wireless switch panel, wherein the wireless switch panel comprises a wireless communication device and an antenna, and the method comprises the following steps: acquiring a return loss change curve varying with a communication frequency between the wireless communication device and the antenna respectively based on the condition that the wireless switch panel is installed in different medium types; dividing a communication frequency of the wireless communication device into multiple frequency bands, determining a frequency band where a minimum return loss in a communication frequency range is located according to the return loss change curve, and matching the frequency band with a corresponding medium type; detecting a frequency band where a resonant frequency of the current antenna is located in the communication frequency range, and adaptively adjusting based on the matching result. The application further discloses a wireless switch panel and a computer readable storage medium, which can adaptively adjust a network signal.

The utility model relates to a foldable type multifunctional centrally-mounted safety frame and tractor, the tractor comprises a tractor main body and a safety frame, the tractor main body comprises a chassis and a gearbox installed on the chassis, and the gearbox is located in the middle of the tractor main body; the safety frame comprises a first camber beam and two support sets, each support set comprises a first support and a second support, and the two ends of the first camber beam are connected with the ends, in the length direction, of the first supports respectively. Each support set comprises a folding positioning assembly used for connecting the first support and the second support in the support set. The ends, away from the first support, of the two second supports are fixedly connected with the gearbox. The safety frame is directly installed on the gearbox of the tractor chassis, the strength of the safety frame is enhanced, and the safety frame arranged in the middle can provide a larger safety accommodation area for a driver. The safety frame is folded through the folding positioning assembly, and the height of the whole tractor can be reduced in the transportation process.