7results about How to "Prevent external electromagnetic interference" patented technology

The invention discloses a planar integrated hollow rectangular dielectric waveguide, and relates to the field of planar integrated waveguides, and the planar integrated hollow rectangular dielectric waveguide comprises an upper dielectric layer, a middle dielectric layer and a lower dielectric layer which are distributed from top to bottom, and a metal ground plane attached to the lower surface of the lower dielectric layer. The left side air hole area, the middle wave guide area and the right side air hole area are distributed from left to right; the middle wave guide region is provided with an air slot in the center of the middle dielectric layer to form a hollow wave guide structure; a plurality of columns of air holes penetrating through the upper dielectric layer, the middle dielectric layer and the lower dielectric layer are formed in the left air hole area and the right air hole area, and an air hole array is formed. The planar integrated hollow rectangular dielectric waveguide designed by the application has the advantages of low loss, easy realization of integrated design and planar integration, and simple and stable structure.

The utility model provides a waterproof sealing servo turntable control box with high cooling performance, and belongs to the technical field of control boxes. The problem that the sealing performance and the cooling effect of an existing servo turntable control box are difficult to consider at the same time is solved. The control box comprises a control box body, an isolation plate and a cooling structure, the isolation plate is fixedly arranged in the control box body and divides the space in the control box body into a sealing cavity and a cooling cavity, and the isolation plate is made of a heat conduction material; the sealing cavity is used for placing a power supply and electronic devices; the cooling structure comprises a water-cooling heat dissipation pipe and a plurality of fans, the water-cooling heat dissipation pipe is fixedly arranged in the cooling cavity, a plurality of ventilation openings are formed in the two opposite side walls of the cooling cavity, a part of the fans are arranged on one side wall of the cooling cavity, the other part of the fans are arranged on the other side wall of the cooling cavity, and the fans and the ventilation openings are arranged in a one-to-one correspondence mode. The control box not only has good waterproof sealing capability, but also has efficient cooling capability.

The application relates to a shelter of a carbon fiber honeycomb composite board material with electromagnetic wave shielding, which comprises a metal plate and a metal frame, the metal plate is connected with a heat insulation foam plate, the sound insulation layer is connected with a fiber layer, the honeycomb plate is connected with a fixed plate, and the electromagnetic wave shielding layer is connected with a wave absorbing layer; the movable plate is connected with a spring, a honeycomb rod and a wave absorbing rod, and the rubber pad is connected with a guide groove; during installation, the guide groove is aligned with the rubber pad and connected, the spring is extruded under pressure, the shelter plate material and the metal frame are fixed through a fastening structure, and installation is sequentially carried out; when radar detection or electromagnetic waves appear, the radar detection waves or the electromagnetic waves sequentially pass through a reflection layer, the metal plate, the heat insulation foam plate, the sound insulation layer, the fiber layer, a bulletproof layer, the wave absorbing layer, the electromagnetic wave shielding layer, the fixed plate and the honeycomb plate, are attenuated layer by layer, the radar detection or the electromagnetic waves are shielded, the equipment in the shelter is prevented from being interfered by external electromagnetic waves, the radar detection is shielded, and the shelter is prevented from being discovered by the radar.

The invention provides a power supply quality analysis model based on a neural network algorithm, and relates to the field of power supply quality analysis. A power management module can provide temporary power support for a whole analysis system when commercial power is interrupted; the data acquisition module is used for converting the current signal into a digital signal and acquiring the digital signal; the data preprocessing module is used for amplifying and filtering the collected signals; the feature extraction module is used for calculating time domain features and frequency domain features of the received data; and the analysis and evaluation module calculates the preprocessed data and generates a graph, thereby solving the problems that when an existing power supply quality analysis model based on a neural network algorithm is used for analyzing the power supply quality, if the collected power supply quality data is interfered, the power supply quality analysis model is very easy to generate errors in the analysis process, and the analysis accuracy is poor. Therefore, the problem that the analysis quality is affected badly is solved, and the accuracy of an analysis result is ensured.

The utility model relates to the technical field of car light circuit, specifically disclose a miniaturized integrated car light BUCK circuit, including BUCK IC integrated chip, BUCK IC integrated chip includes VIN pin, EN pin, VOUT pin, FB pin, VCC pin and BST pin, has the first capacitor group and second capacitor group on VIN pin, the first resistance formation POWER IN is connected on EN pin, the voltage -division resistance for voltage division is provided with on FB pin, VOUT pin is connected with third capacitor group, the utility model discloses a purpose at to solve the traditional car light circuit reliability problem through car light BUCK circuit, help system improves stability.

The utility model relates to the technical field of optical fibers, and discloses an optical fiber convenient to peel, which comprises an optical fiber cable sheath main body, a connector is fixedly arranged on the surface of the optical fiber cable sheath main body, a cable core is fixedly arranged in an inner cavity of the optical fiber cable sheath main body, and a cable sheath branch is fixedly arranged at the other end of the cable core. According to the utility model, through the arrangement of the connector, the protective sleeve and the connecting ring, the optical fiber cable sheath main body and the cable sheath branch can be positioned, the cable sheath branch is stable, the exposed part of the optical fiber can be protected, the exposed part is prevented from being broken, and the connector is separated from the connecting ring by unscrewing the protective sleeve during wiring. The optical fiber cable sheath main body can be exposed by taking off the cable sheath branches from the optical fiber cable sheath main body, so that wiring is facilitated, the optical fiber cable sheath main body is composed of the wear-resistant sheath, the functional layer and the insulating layer, and the functional layer is composed of the reinforcing layer, the shielding layer and the tensile layer, so that the optical fiber cable sheath main body has good strength, shielding performance and tensile resistance.

The utility model relates to a micro coaxial radio frequency probe card, which belongs to the technical field of probe cards and comprises a substrate main body, fixed protection mechanisms are arranged at the top and the bottom of the substrate main body, and each fixed protection mechanism comprises a fixed support fixedly mounted at the top of the substrate main body. According to the micro coaxial radio frequency probe card, the fixing support fixes the coaxial radio frequency connector through the fixing groove, the radio frequency probe body is located at the top of the coaxial radio frequency connector, the arc-shaped top end of the radio frequency probe body is beneficial to contact with a device to be tested and guarantee accurate transmission of signals, and the protective copper pipe wraps the coaxial radio frequency connector to prevent signal leakage and resist external electromagnetic interference. The positioning block ensures that the coaxial radio frequency connector is accurate in position and prevents displacement; the grounding tube provides grounding shielding for the radio frequency probe, reduces external electromagnetic interference and ensures signal transmission stability; the radio frequency probe body is in contact with a device to be tested during testing, and a signal is transmitted through the coaxial radio frequency connector; and the fixed protection mechanism ensures stable work and accurate test.