118 results about "Electromagnetic wave interference" patented technology

The invention discloses a composite shielding material effect experiment data analysis method, and particularly relates to the field of material shielding effect analysis, and the method comprises the following steps: measuring key data such as dielectric constant, magnetic conductivity, conductivity and thickness of each layer of a composite shielding material through an electromagnetic performance measurement instrument; establishing an electromagnetic wave propagation model for describing propagation of electromagnetic waves in the multilayer medium based on a Maxwell equation, and defining boundary conditions of a test sample; time domain and frequency domain characteristics of an electromagnetic interference source are simulated through Fourier transform, and actual input interference is simulated. And analyzing the dynamic response of the electromagnetic wave propagation model under transient and steady-state interference signals to form an electromagnetic wave interference response propagation model. Through comparison with actual shielding effectiveness test data, model parameters are adjusted, and it is ensured that model calculation errors are within an acceptable range. A full-band shielding effectiveness prediction map of the composite shielding material is generated based on the model, and theoretical support is provided for material design and optimization.

The invention relates to the technical field of power equipment detection, and discloses an unmanned aerial vehicle-mounted ultrahigh frequency partial discharge detection system and detection method, and the system comprises an unmanned aerial vehicle-mounted unit, a partial discharge detection unit, and a handheld signal receiving and analysis terminal. The partial discharge detection unit is used for collecting and processing ultrahigh-frequency partial discharge signals generated by partial discharge of the high-voltage electrical equipment, and is also used for sending the processed signals to the unmanned aerial vehicle carrying unit; the unmanned aerial vehicle carrying unit is used for carrying the partial discharge detection unit and is also used for sending a signal processed by the partial discharge detection unit to the handheld signal receiving and analyzing terminal; the handheld signal receiving and analyzing terminal is used for communicating with the unmanned aerial vehicle carrying unit and obtaining an ultrahigh-frequency partial discharge detection result based on a communication result; the problems that an existing unmanned aerial vehicle detection system is low in complex environment adaptability and communication is prone to being interfered by electromagnetic waves are solved.

The invention relates to an image sensor packaging structure and a preparation method thereof, and relates to the technical field of chip packaging, the image sensor packaging structure comprises a substrate, a structural chip, a heat dissipation shielding cover, a sensing chip and a protection shading cover, the structural chip is mounted on the substrate; the heat dissipation shielding cover is arranged outside the structural chip in a covering manner; the sensing chip is attached to the middle of the side, away from the substrate, of the heat dissipation shielding cover and is provided with a photosensitive area. The protective shading cover is arranged on the substrate. Compared with the prior art, by arranging the heat dissipation shielding cover, electromagnetic shielding can be achieved between different chips in the packaging structure, the sensing chip is prevented from being interfered by electromagnetic waves, meanwhile, the heat dissipation effect can be achieved, and the heat dissipation effect on the structural chip is improved. In addition, by arranging the protective shading cover, external light can be shielded, poor light sensing of the sensing chip caused by refraction or diffraction of the external light is avoided, and the light sensing effect of the sensing chip is further improved.

The utility model discloses partial discharge monitoring equipment for a switch cabinet, and the equipment comprises an integrated intelligent partial discharge sensor and a data collector. The integrated intelligent partial discharge sensor comprises a processor, a USB interface, a charging management chip, a lithium ion battery, a synchronous positive and negative voltage DC-DC converter, a circuit power management unit, an ultrasonic unit, a TEV unit and a wireless communication module. Signals collected by the integrated intelligent partial discharge sensor are accessed to the multifunctional data gateway by the data collector through a wireless network via a network port / RS485 / serial port, and then the data are transmitted to a background terminal. According to the utility model, the problems of on-line monitoring of the partial discharge signal state of the switch cabinet, narrow actual measurement bandwidth of the TEV and easy interference of environmental electromagnetic waves in the TEV test are solved.

The invention discloses a composite material with a shielding function, a preparation method thereof and an interphone shell. The composite material comprises a polycarbonate-acrylonitrile-butadiene-styrene copolymer, a modified conductive filler, maleic anhydride grafted polyethylene, polyaryletherketone, a flame retardant, an antioxidant, glass microfibers and a compatilizer, wherein the modified conductive filler is aluminum oxide ceramic particles subjected to chemical copper plating and graft polymerization treatment. The preparation method comprises the steps of modified conductive filler preparation, step-by-step raw material mixing, twin-screw extrusion granulation and drying. The interphone shell is prepared from the composite material through injection molding, and the injection molding process comprises the steps of raw material drying, injection molding machine preheating, charging and injection molding, and demolding and finishing. The composite material is stable in electromagnetic shielding performance and has good mechanical strength and heat resistance; the preparation method can improve the dispersity of the components and is adaptive to conventional equipment; the interphone shell can block electromagnetic wave interference, is suitable for being used in multiple environments, and meets the requirements of an electronic equipment shell for shielding and structural performance.

A motor assembly includes a brushless electric motor including a motor stator and a motor rotor configured for rotating within the motor stator. The motor stator includes a plurality of windings. The brushless electric motor also includes a rotor shaft non-rotatably connected to the motor rotor for rotating with the motor rotor and a resolver position sensor including a resolver stator and a resolver rotor configured for rotating within the resolver stator. The resolver rotor is non-rotatably connected to the rotor shaft for rotating with the rotor shaft. The resolver stator generates a signal based on a rotational position of the resolver rotor. The brushless electric motor also includes a rotor shaft bearing coupled to the rotor shaft and a bearing support supporting the rotor shaft bearing to allow the rotor shaft to rotate with respect to the bearing support. The bearing support is or includes an electromagnetic interference shield to reduce or block electromagnetic waves emitted by the windings of the motor stator from interfering with the signal generated by the resolver stator.

The invention belongs to the technical field of electromagnetic wave absorption, and particularly relates to a heterogeneous electromagnetic wave absorption composite nanofiber and a preparation method thereof, and the composite nanofiber comprises a matrix formed by carbon nanofibers and CoS2 nanoparticles dispersed on the surface or inside the carbon nanofibers in an embedded form. The composite nanofiber disclosed by the invention shows excellent electromagnetic wave absorption performance in a relatively wide frequency range, the minimum reflection loss reaches-59.84 dB, the effective absorption bandwidth is 4.9 GHz, and particularly, the composite nanofiber shows excellent wave absorption performance in an X wave band (8-12 GHz). Therefore, the material is suitable for electromagnetic wave interference suppression and information security protection of electronic equipment. In addition, the material is prepared through electrostatic spinning and a high-temperature treatment process, the process is simple and extensible, large-scale production is easy to achieve, and the material has high industrial application potential.

The utility model relates to the field of circuit boards, in particular to a circuit board with an electromagnetic shielding structure, which comprises a circuit board main body, a component main body used for equipment, an electromagnetic shielding layer and a shielding layer, and outer mounting frames are fixedly mounted on the two sides of the exterior of the electromagnetic shielding layer. The circuit board is provided with the electromagnetic shielding layers, the threaded holes, the threaded rods, the butt joint blocks, the butt joint grooves, the embedded blocks, the element shielding covers and the outer shielding covers, when the circuit board is used, the upper electromagnetic shielding layer and the lower electromagnetic shielding layer effectively block electromagnetic wave interference from different directions, the circuit board and the sensitive elements are protected from being damaged by external electromagnetic waves, and the service life of the circuit board is prolonged. Then, according to the use requirement of the sensitive element, a butt joint block is mounted outside the sensitive element through a threaded hole and a threaded rod, and then an element shielding cover is fitted through a butt joint groove and an embedded block, so that the electromagnetic shielding effect of a key area is further enhanced.

The application discloses a kind of specific frequency electromagnetic wave interference target navigation's expelling system and method, belong to navigation countermeasure technical field.The present application obtains nest coordinate set, obtains the stress threshold of the bird class to which each nest belongs;Calculate the noise influence range from inside to outside, form nest area influence range set;Record the model of target unmanned aerial vehicle and target coordinate;The target coordinate at the present time is matched with nest area influence range set in space, and the output judgment result is output;When target is in nest area influence range, output frequency is normal interference frequency;When target is in nest area influence range, whether the bird is in nest, whether environmental noise value is greater than stress threshold is judged, and sub-scene judgment and interference execution are carried out;In the process of navigation interference, screening is separated from boundary point, and predetermined trajectory is generated;Based on predetermined trajectory, target is interfered with navigation, and when the current coordinate of target is separated from bird breeding area, navigation interference is terminated.

The utility model discloses an assembly type threading pipe, and relates to the field of assembly type PE threading pipes, comprising a threading pipe main body, an insulating layer installed inside the threading pipe main body, an anti-corrosion layer installed inside the insulating layer, a first joint installed at the front end of the threading pipe main body, an installation groove opened on the outer wall of the first joint, and a second joint installed on the outer wall of the installation groove. A first sealing groove is formed in the front end of the first connector, a sealing ring is mounted in the first sealing groove, a mounting ring is mounted in the mounting groove, a fixing ring is mounted at the front end of the mounting ring, a mounting nut is mounted at the front end of the fixing ring, and a first internal thread is formed in the mounting nut. The utility model can be used for preventing electromagnetic wave interference and preventing aging and corrosion of wires; in addition, the device can be quickly assembled and is convenient to use.

The utility model relates to the technical field of glass, in particular to a multifunctional composite glass structure, which comprises a glass main body and an outer frame wrapped on the periphery of the glass main body, the glass main body is provided with two layers, the outer frame consists of a top plate and side plates, a cavity is arranged between the two layers of glass main bodies, and an adjustable shading component is arranged in the cavity. According to the multifunctional composite glass structure, the two shielding layers are arranged on the two sides of the high-transmittance layer of the glass body, the shielding effect can reach 100 dB, electromagnetic wave interference can be eliminated, the heating layer is arranged, the heating effect can be achieved, the defrosting and demisting functions are achieved under low-voltage driving, and due to the fact that the shading assembly is arranged, the shielding effect is good. When light is too strong and needs to be shielded, the adjusting motor is controlled to start to drive the worm to rotate, then the worm gear drives the rotating shaft and the light shielding blades to rotate by a certain angle, the light shielding blades are made to be in a vertical state, and the light intensity can be greatly weakened.

The embodiment of the invention provides a microwave uniform heating device and method, and relates to the technical field of microwave heating, and the device comprises a coupling cavity which is used for generating an electric field through electromagnetic wave interference; the first surface and the second surface of the coupling cavity are in contact with a heated load; the first surface and the second surface of the coupling cavity are radiation units capable of realizing excitation of surface plasmons and electric field radiation, and a plurality of through holes are uniformly formed in the radiation units; the third surface of the coupling cavity is provided with a microwave feed port. Wherein the first surface and the second surface are opposite to each other. According to the technical scheme, even heating can be achieved through the through holes evenly formed in the radiation unit, an additional mechanical structure is not needed, cost is low, and the structure is simple.

A display panel, a display module and a manufacture method thereof, and a communication device are provided. The display panel includes a display substrate and a multiplexing circuit arranged on a first surface of the display substrate. The display panel further includes a wave-absorbing material layer arranged on a second surface of the display substrate. The wave-absorbing material layer is configured to absorb electromagnetic wave interference signals. The second surface is a surface opposite to the first surface.

The present invention relates to the technical field of HDMI data cables, and specifically discloses an HDMI data cable for home audio-visual wiring. The technical problem to be solved by the present invention is that the structure of the existing HDMI data cable is relatively single, and it often does not have strong anti-electromagnetic wave interference ability. When users pre-bury HDMI data cables, they are often mixed with high-voltage cables, resulting in distortion of high-definition signals in the later stage. Moreover, when high-frequency signals are affected by electromagnetic interference, problems such as jitter, frame skipping, and picture noise will occur, affecting the viewing effect. The technical solution is as follows: It includes a data cable body, and the data cable body includes a sheath, an inner protection layer, a filling layer, and electric wires. The inner protection layer is arranged inside the sheath. The beneficial effect of the present invention is that by using the inner protection layer, the design of the inner protection layer adopts a combination design of multiple shielding materials. On the one hand, it improves the anti-interference ability, and on the other hand, it uses the characteristics of the materials to improve the strength of the cable and extend the service life of the data cable body.

The invention discloses an intelligent road cone and a vehicle dynamic guiding method, and belongs to the technical field of intelligent traffic facilities, the intelligent road cone comprises a cone structure, a counterweight base, a sensing unit module, a microcontroller, a communication module and a warning module.The inclination state is monitored through a posture detection assembly, a sensing unit collects multi-dimensional data, and the warning module sends the multi-dimensional data to the microcontroller; according to the guiding method based on the road cone, coherent electromagnetic waves are emitted through the intelligent road cones on the two sides of a road to form an interference enhancement area, a repulsive force-gravitational force virtual force field model is constructed in combination with multi-channel signal detection, and the interference enhancement area and the repulsive force-gravitational force field model are combined. And guiding the vehicle to drive towards a safe area by using the control logic that the gravitation weight is dynamically higher than the repulsive force. According to the invention, hot plug expansion is realized by adopting a modular architecture, the structural stability and the function expansibility are enhanced, the vehicle guiding precision is improved through dual-source electromagnetic wave interference and an intelligent control algorithm, the traffic conflict risk in a construction area is effectively reduced, and the road construction safety and the management efficiency are improved.

The utility model discloses a novel coal safety explosion-proof video monitoring power cable, and relates to the technical field of cables, the novel coal safety explosion-proof video monitoring power cable comprises a cable core, an insulating layer is arranged outside the cable core, a winding layer I is arranged outside the insulating layer, a shielding layer is arranged outside the winding layer I, and an oxygen barrier layer I is arranged outside the shielding layer; an explosion-proof layer is arranged outside the first oxygen isolation layer. The insulating layer, the first winding layer, the first oxygen isolation layer, the second winding layer and the second oxygen isolation layer are arranged outside the cable core so that the flame retardant effect of the cable can be improved, the shielding layer is arranged so that the anti-electromagnetic wave interference performance of the cable in use can be enhanced, and the anti-explosion layer and the compression-resistant layer are arranged so that the tensile resistance and the anti-explosion performance of the cable can be enhanced. The cable is not easy to be damaged by external force in use, the overall safety and reliability of the cable are improved through the arrangement of the outer protection layer, and the cable has certain durability in a coal mine.

The utility model discloses an electric connector, which comprises a plastic part and an insulating body, a plurality of elastic arms of a plurality of conductive terminals are respectively and correspondingly accommodated in a plurality of terminal grooves of the plastic part, the short circuit phenomenon of two adjacent elastic arms is avoided, a first metal shell is sleeved on the insulating body from one end of the insulating body far away from the plastic part, and a second metal shell is sleeved on the insulating body from the other end of the insulating body far away from the plastic part. The plastic part is sleeved with the second metal shell from the end, far away from the insulating body, of the plastic part, the first buckling part of the first metal shell is clamped with the second buckling part of the plastic part, and the second buckling part of the second metal shell is clamped with the first buckling part of the insulating body, so that positioning between the insulating body and the plastic part is facilitated, and the plastic part is prevented from being damaged. The second metal shell comprises a sleeving part and a shielding part which is bent and extends from the sleeving part, the shielding part is located behind the rear surface, the shielding part shields a part of the conductive terminal, and the sleeving part and the shielding part are matched together to be beneficial to shielding electromagnetic wave interference emitted by the elastic arm and electromagnetic wave interference emitted by the outside to the elastic arm.

A motor assembly includes a brushless electric motor including a motor stator and a motor rotor configured for rotating within the motor stator. The motor stator includes a plurality of windings. The brushless electric motor also includes a rotor shaft non-rotatably connected to the motor rotor for rotating with the motor rotor and a resolver position sensor including a resolver stator and a resolver rotor configured for rotating within the resolver stator. The resolver rotor is non-rotatably connected to the rotor shaft for rotating with the rotor shaft. The resolver stator generates a signal based on a rotational position of the resolver rotor. The brushless electric motor also includes a rotor shaft bearing coupled to the rotor shaft and a bearing support supporting the rotor shaft bearing to allow the rotor shaft to rotate with respect to the bearing support. The bearing support is or includes an electromagnetic interference shield to reduce or block electromagnetic waves emitted by the windings of the motor stator from interfering with the signal generated by the resolver stator.

The utility model relates to the technical field of cables, in particular to a special cold-resistant flexible cable for a flame-retardant shielding type aviation obstruction beacon, which comprises a cable core as well as a cabling wrapping layer and a sheath layer which are sequentially coated outside the cable core, and is characterized in that the cable core is formed by twisting three main cable cores and two auxiliary cable cores; a filling layer is filled in a middle twisting gap and a peripheral twisting gap of the three main wire cores and the two auxiliary wire cores; each main wire core comprises a wire core conductor, and an insulating layer, a fire-resistant wrapping layer and a braided shielding layer are sequentially coated outside each wire core conductor; each auxiliary wire core comprises a wire core conductor, and the exterior of each wire core conductor is sequentially coated with an insulating layer and a fireproof wrapping layer. According to the utility model, the current breakdown phenomenon caused by too high temperature when the existing cable works is solved, the problems that the cable sheath is easy to crack and the cable is accelerated to age in cold weather are solved, and the structure can keep stable operation under complex natural conditions and in an environment with electromagnetic wave interference.

The utility model discloses an anti-interference vibration sensing structure, which belongs to the anti-interference technical field of vibration sensors and comprises a vibration sensor, an output end signal transmission line of the vibration sensor is connected with a controller, and one end of the signal transmission line close to the vibration sensor is sleeved with a magnetic ring. The beneficial effects of the utility model are that one end of the signal transmission line, which is close to the vibration sensor, is sleeved with the magnetic ring, thereby reducing field strong surge interference and strong electromagnetic wave interference, optimizing the normal signal transmission process of the vibration sensor, and improving the stability and accuracy of detection.

The utility model discloses an anti-twisting loosening type anti-interference audio cable which comprises two insulating wire cores and two nylon fiber filling cores which are symmetrically arranged in a cross shape and are jointly twisted to form a cable core, and the cable core is sequentially coated with a PTFE semi-directional belt wrapping antifriction layer, an aluminum foil shielding layer and an irradiation crosslinking high-density polyethylene outer sheath layer. A tinned oxygen-free copper bar streamline is arranged between the antifriction layer and the shielding layer, the insulating wire core comprises a tinned oxygen-free copper conductor and an irradiation crosslinking low-density polyethylene insulating layer, the insulating wire core is back-twisted and twisted, the twisting pitch is 8-15 times of the outer diameter, the twisting direction of the insulating wire core is opposite to the twisting direction of the cable core, the sectional area of the insulating wire core is 0.2 mm2 to 1.5 mm2, and the outer diameter of the outer sheath layer does not exceed 9mm. According to the cable, the cable core structure is balanced, the double cores are twisted tightly and are not easy to loosen, the influence of interference generated between the double-core wire pairs is reduced, the external electromagnetic wave interference resistance is enhanced, and the stable signal transmission characteristic is ensured.

The invention discloses a severe convection weather intelligent early warning method based on phased array weather radar collaborative networking, and belongs to the field of weather early warning. Comprising the following steps: S1, adopting multiple phased array (dual-polarization) weather radars to carry out collaborative networking observation, and obtaining observation data with high temporal-spatial resolution; s2, carrying out quality control on the obtained dual-polarization radar observation base data, wherein the quality control comprises ground clutter suppression, electromagnetic wave interference suppression, radial velocity defuzzification and missing measurement data filling; and S3, projecting observation data of the plurality of phased array weather radars into three-dimensional grid point data under a Cartesian coordinate system, and performing data fusion processing. The method has the beneficial effects that the intelligent severe convection weather early warning method based on phased array weather radar collaborative networking is provided, the dual-polarization detection data and the characteristic quantity thereof are increased, and the recognition precision and the suppression rate of ground clutters are remarkably improved.

The invention relates to the technical field of cable manufacturing, and particularly discloses a shielding type super-high-temperature-resistant compensation cable which comprises alloy wires, every two alloy wires form a group, the four alloy wires are distributed in a rectangular array mode, the outer wall of an insulating layer is fixedly connected with a shielding layer, the outer wall of the shielding layer is fixedly connected with a filling layer, and the outer wall of the filling layer is fixedly connected with an insulating layer. The outer wall of the filling layer is fixedly connected with outer sheaths, a first layer of wrapping tape is fixedly connected between the insulating layer and the shielding layer, the number of the outer sheaths is two, and a fourth layer of wrapping tape is arranged between the two outer sheaths; the preparation method comprises the following steps: S1, preparing the insulated wire core; s2, cable core cabling and filling; s3, preparing a shielding layer; and S4, preparing an outer sheath. Through the copper wire or tinned copper wire shielding layer and the galvanized steel wire armor layer, high and low frequency electromagnetic wave interference is effectively shielded, the mechanical strength is high, the bending performance is good, and the glass fiber filament braid layer and the mica tape wrapping layer provide excellent fire resistance and mechanical shock resistance.

The application provides a conductive and heat-conductive composite ink as well as a preparation method and application thereof. The conductive and heat-conductive composite ink comprises cluster-state material liquid drops in a pomegranate-like structure; the cluster-state material in the pomegranate-like structure comprises graphene, liquid metal and one-dimensional conductive and heat-conductive material; the graphene is assembled on the surface of the liquid metal to form hybrid microspheres, and the one-dimensional conductive and heat-conductive material is bridged between the hybrid microspheres to form the cluster-state material in the pomegranate-like structure. The composite ink provided by the application can obtain a dense, high-conductive and bidirectional heat-conductive film, which is used for a thermal interface material and simultaneously has electromagnetic shielding performance in a GHz frequency band and high interface thermal conductivity, so that key parts in an electronic device are protected from electromagnetic wave interference and high temperature, and high-speed operation of the electronic device is ensured.

The invention provides an infrared window structure and a preparation method thereof, the infrared window structure comprises a substrate and an antireflection film arranged on one side surface of the substrate, the substrate is a zinc oxide substrate, and the antireflection film is an ytterbium oxide film. According to the invention, the transparent conductive zinc oxide is used for replacing a traditional non-conductive material as a medium-wave infrared window material, and the ytterbium oxide film with a certain thickness is arranged on the surface of the zinc oxide single crystal, so that the transmittance of the zinc oxide single crystal material in medium-wave infrared is improved, and the electromagnetic wave interference resistance of the infrared window material is improved; the application range is widened, and the use performance is improved.

The utility model relates to the technical field of batteries, in particular to an electromagnetic shielding structure, a battery shell, a battery and an energy storage device, the electromagnetic shielding structure is used for preventing electromagnetic waves outside the battery shell from interfering a sensitive device in the battery shell, the shielding structure comprises conductive cloth, and the conductive cloth is arranged on the surface of an upper shell; and the conductive cloth can completely cover the orthographic projection of the sensitive device on the upper shell. Interference is blocked and discharged from a propagation path on the basis of the EMC three-element principle, electromagnetic waves outside the battery shell can be effectively prevented from interfering sensitive devices in the battery shell, the defect that the anti-interference capability is poor due to the fact that an upper shell of the power battery pack is made of a non-conductive material is overcome, cost reduction and light weight of the power battery pack are achieved, and the power battery pack is suitable for large-scale popularization and application. And the anti-interference capability of the battery is improved.

The utility model discloses a GIS partial discharge detection device based on a coupling capacitance method. The GIS partial discharge detection device comprises a solar blind photoelectric detector, a single electron detector, a photomultiplier sensor, a signal conversion module, a capacitive sensor, a data acquisition module, a database and a single-chip microcomputer module. The solar blind photoelectric detector, the single electron detector and the photomultiplier sensor are mounted on the inner wall of the GIS; the signal conversion module, the capacitive sensor and the data acquisition module are mounted on the outer wall of the GIS; the signal conversion module is electrically connected with the solar blind photoelectric detector and the photomultiplier sensor respectively; the data acquisition module is electrically connected with the signal conversion module and the capacitive sensor respectively; the single-chip microcomputer module and the database are electrically connected with the data acquisition module in sequence. According to the utility model, data can be collected, sensitivity can be improved, interference resistance can be realized, and problems of poor anti-interference capability and easy electromagnetic wave interference existing in a coupling capacitance method can be solved.

The invention provides a cavity WiFi antenna applied to a notebook computer, which is applied to the technical field of mobile communication and comprises a dielectric substrate, an upper-layer radiation unit, a lower-layer radiation unit and a cavity, the upper-layer radiation unit and the lower-layer radiation unit are respectively configured on the upper surface and the lower surface of the dielectric substrate, and the upper-layer radiation unit and the lower-layer radiation unit are electrically connected; the cavity is configured below the dielectric substrate, and a cavity is formed between the cavity and the dielectric substrate and used for directional radiation of the antenna and shielding electromagnetic wave interference in the notebook computer. According to the cavity WiFi antenna applied to the notebook computer, through the structural design of the dielectric substrate and the cavity, electromagnetic wave interference in the notebook computer can be shielded while directional radiation of the antenna is achieved.

The invention relates to the technical field of fault detection of distribution lines, in particular to a fault detection system suitable for a distribution line. Comprising an infrared thermal imaging detection module, a current real-time monitoring module, an ultrasonic fault positioning module, an electromagnetic wave interference detection module, a deep learning analysis module, an unmanned inspection module, an environment monitoring module and an interactive alarm module. The system integrates various monitoring technologies, can comprehensively and accurately reflect the state of a line, can monitor the state of the line in real time, can immediately give an alarm and process once an abnormality or a fault is found, can accurately position a fault point through an ultrasonic fault positioning technology, improves the maintenance efficiency, and reduces the maintenance cost. The deep learning advanced technology is used for intelligent analysis of monitoring data, the line state can be preliminarily judged, a basis is provided for maintenance decision making, unmanned line inspection is achieved through application of the unmanned aerial vehicle technology, and the inspection efficiency and safety are improved.

This invention discloses a method for detecting the phase center of a Beidou navigation antenna and communication antenna feed, belonging to the field of satellite navigation and communication technology. Specifically, it includes the following steps: S1, connecting the transmitting antenna, transmitting turntable, vector network analyzer, computer, printer, antenna turntable, and antenna under test in a microwave anechoic chamber; S2, adjusting the antenna under test and the transmitting antenna using a laser beam to ensure consistent measurement standards. The microwave anechoic chamber is covered on all six sides with shielding and absorbing materials, effectively isolating external electromagnetic interference and creating a reflection-free, low-interference testing environment. This avoids distortion of phase measurement data due to external electromagnetic signal coupling, ensuring that the test results accurately reflect the antenna's inherent characteristics. Strict limits are imposed on parameters such as the quiet zone size, humidity, temperature, and atmospheric pressure of the microwave anechoic chamber to reduce the impact of slowly changing environmental factors such as temperature and humidity on the antenna's electrical performance, ensuring consistent testing conditions.