39 results about "Electromagnetic wave interference" patented technology

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.

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 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.

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 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 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.

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.

The invention relates to the technical field of vehicle-mounted electronics, in particular to a vehicle-mounted video interference suppression method and system based on EMC optimization, and the method comprises the steps: building a transmission reference model; comparing the model with a composite signal on a transmission link in real time, extracting a holographic electromagnetic wave interference component through holographic differential processing, analyzing an amplitude-phase transfer function, and generating a reverse holographic electromagnetic wave through phase conjugate inversion; reverse holographic electromagnetic waves are coupled and injected into a link through a distributed holographic modulation array, and coherent cancellation is carried out on the reverse holographic electromagnetic waves and original interference; residual interference is monitored at the downstream of the link, and the offset effect is dynamically optimized through an adaptive weight updating algorithm. According to the invention, channel noise in a transmission link is eliminated from the source through active cancellation, the technical problem that a video signal is submerged by noise before reaching a receiving end in a strong electromagnetic interference environment is solved, and the suppression effect under complex and changeable working conditions is ensured through a self-adaptive closed-loop system. And the transmission reliability and fidelity of the vehicle-mounted video signal are obviously improved.

1. Name of the designed product: inductance. 2. Use of the designed product: for suppressing electromagnetic wave interference signal. 3. Design points of the designed product: in the shape of the product. 4. Picture or photo best indicating the design points: perspective view 1.

The application discloses a preparation method of long-acting electromagnetic shielding solid wood board and belongs to the technical field of wood functional treatment. The preparation method comprises the following steps: first, vacuum pressure impregnation treatment of the solid wood board is carried out by using a phenyl trimethoxysilane solution; then, impregnation treatment of the solid wood board is carried out by using an aniline solution and an ammonium persulfate solution respectively; then, electrochemical treatment of the solid wood board is carried out by using the aniline solution; and finally, spraying treatment of the solid wood board is carried out by using a water-based polyurethane coating. The electromagnetic shielding solid wood board prepared by the application has high electromagnetic shielding efficiency and excellent electromagnetic shielding efficiency stability, can effectively prevent the systems such as precision instruments, scientific measurement and medical care from being interfered by external electromagnetic waves, and has high economic value and social benefits.

The utility model discloses a low-frequency electromagnetic shielding device, and belongs to the technical field of electromagnetic shielding. The device comprises a shielding box, the shielding box is provided with a temperature adjusting mechanism used for adjusting the internal temperature of the shielding box, the shielding box is internally provided with a detection mounting assembly, the detection mounting assembly comprises a mounting base and a signal receiving socket which are arranged at the inner bottom of the shielding box, the mounting base is provided with a plurality of groups of mounting sockets, and the signal receiving socket is connected with the signal receiving socket. Wherein an electromagnetic wave signal interference simulation device is mounted on one group of mounting sockets, and an opening is formed in the shielding box. When the shielding box is used, electromagnetic waves generated by the outside are isolated under the action of the metal isolation box and the metal plate, so that a closed environment capable of shielding external electromagnetic interference is created in the shielding box. Through the electromagnetic wave signal interference simulation device, electromagnetic wave interference signals in different environments and different degrees in life can be simulated, and the use conditions of the detection circuit module in various environments can be determined.

The invention relates to the technical field of unmanned aerial vehicles, and discloses an unmanned aerial vehicle detection method and system. The unmanned aerial vehicle detection method comprises the following steps: receiving remote identification information sent by an unmanned aerial vehicle in real time, and verifying the remote identification information; in response to verification failure, abnormal identification is carried out on the remote identification information; and repairing the remote identification information based on the abnormal identification result and the first historical remote identification information of the unmanned aerial vehicle. Wherein the first historical remote identification information is the remote identification information of the unmanned aerial vehicle, which is received before the currently received remote identification information. According to the scheme, abnormal remote identification information can be recovered, so that the utilization rate of the remote identification information is improved, the influence of factors such as an installation environment and electromagnetic wave interference on unmanned aerial vehicle remote identification information propagation is reduced, the missing of unmanned aerial vehicle tracks is reduced, the increase of deployment cost is reduced, and the detection distance of an unmanned aerial vehicle receiver is prolonged; and the data processing pressure increase and the data processing speed are reduced.

The utility model discloses a partial discharge ultrasonic signal measuring and processing circuit for a switch cabinet. The partial discharge ultrasonic signal measuring and processing circuit comprises an ultrasonic probe, a voltage amplifying circuit, a filter circuit, an analog-to-digital conversion circuit, a voltage reverse circuit and a 5V power supply circuit, the voltage reverse circuit reversely outputs the + 5V power supply voltage to the filter circuit and the analog-to-digital conversion circuit and provides-5V power supply for the operational amplifier; the filter circuit is designed to be a 36-44kHz band-pass filter; the analog-to-digital conversion circuit is used for converting the filtered ultrasonic signals into 8-bit digital acquisition data; the output end of the ultrasonic probe is connected with the input end of the voltage amplifying circuit; the output end of the voltage amplifying circuit is connected with the input end of the filter circuit; the output end of the filter circuit is connected with the input end of the analog-to-digital conversion circuit; the output end of the voltage reverse circuit is respectively connected with the-5V power supply ends of the filter circuit and the analog-to-digital conversion circuit; the output end of the 5V power supply circuit is connected with the filter circuit and the + 5V power end of the analog-to-digital conversion circuit. According to the utility model, the ultrasonic detection technology is adopted, low-frequency electromagnetic wave interference generated by high-voltage equipment is effectively avoided, and the accuracy of partial discharge detection is improved.

Provided are a cableless optical wireless unit that can avoid electromagnetic wave interference and has good usability, and a magnetic resonance imaging apparatus including the same. An optical wireless unit that is connected to a receive coil unit including a plurality of coil elements via a connector, the optical wireless unit including: a cableless housing, in which the housing includes a battery that supplies electricity to the receive coil unit, and an optical transceiver that converts signal data received from the receive coil unit into an optical wireless signal and transmits the optical wireless signal, and that receives and converts a control signal transmitted by the optical wireless transmission into an electrical signal.

The present application relates to a kind of anti infrared detection fabric, including fabric main body (1), the fabric main body (1) includes skin-friendly warm layer (11), bacteriostatic layer (12) and electromagnetic wave interference layer (13);Skin-friendly warm layer (11), bacteriostatic layer (12) and electromagnetic wave interference layer (13) are connected by three-layer French rib weave;The three-layer French rib weave includes four-way loop system, wherein, first road and third road loop system are jointly woven to form skin-friendly warm layer (11);Fourth road loop system is woven to form bacteriostatic layer (12);Second road loop system is woven to form electromagnetic wave interference layer (13);The upper end of electromagnetic wave interference layer (13) is provided with shielding layer (2), and the upper end of shielding layer (2) is provided with waterproof wear-resistant layer (3);The fabric has bacteriostatic performance, warm performance, electromagnetic wave shielding performance, wear resistance and waterproof performance and far infrared shielding performance.

This disclosure provides a screen state switching method, apparatus, and storage medium. The method includes: determining whether a voltage level generated by a target sensor has changed; and if the voltage level has changed, switching the screen state. This disclosure employs a level-triggered method, switching the screen state only after a change in the voltage level of the target sensor. This avoids misjudgments caused by electromagnetic interference from the surrounding environment when the target sensor uses an edge-triggered method, thus improving the accuracy and usability of screen state switching.

1. The name of the design product: shielding cabinet (manual opening of upper and lower doors). 2. The use of the design product: equipment for shielding various electromagnetic wave interference. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1. 5. The product is a large machine, and the elevation view is not common, so the elevation view is omitted.

The application discloses a method for evaluating the interlayer bonding state of an asphalt pavement and related equipment, and belongs to the technical field of road engineering detection. First, road information is obtained in a nondestructive manner through a ground-penetrating radar, and then an evaluation index of the interlayer bonding state of the road is obtained through radar data. In addition, in the case that the thickness of the poor interlayer bonding is very small, the influence of electromagnetic wave interference coherence on the evaluation index is considered, an auxiliary evaluation index is proposed to comprehensively evaluate the interlayer bonding state, and the accuracy of the evaluation of the interlayer bonding state of the asphalt pavement is improved through the combination of the two indexes.

The invention relates to a conductive wave-absorbing adhesive tape and a preparation method thereof.The conductive wave-absorbing adhesive tape comprises a conductive frame, the upper surface and / or the lower surface of the conductive frame are / is provided with adhesive areas, through holes distributed in an array mode are formed in the conductive frame in the length direction, and the through holes are filled with composite wave-absorbing materials; the composite wave-absorbing material comprises Fe-Co-Ni alloy nanoparticles and a wave-absorbing material, the wave-absorbing material is of a laminated structure, a plurality of holes are formed between two adjacent layers in the laminated structure, the Fe-Co-Ni alloy nanoparticles are mainly distributed in the holes, and the surface layer of the wave-absorbing material is doped with nitrogen and sulfur. The conductive wave-absorbing adhesive tape disclosed by the invention can realize an excellent electromagnetic wave shielding and inhibiting effect in a wide frequency band and multiple directions, and meanwhile, the interference of electromagnetic waves inside and outside is reduced.

The application discloses a processing method and device of an electromagnetic interference signal, a storage medium and an electronic device. The method comprises the following steps: determining the bandwidth of a receiver of the electromagnetic interference signal; obtaining a harmonic frequency spectrum distribution range value of a fundamental wave when the fundamental wave is frequency jittered, and determining a frequency jittering parameter of the fundamental wave according to the frequency of the fundamental wave, the harmonic frequency spectrum distribution range value and the bandwidth of the receiver; and controlling the fundamental wave to perform frequency jittering based on the frequency jittering parameter, so as to attenuate a target electromagnetic interference signal, wherein the target electromagnetic interference signal is an electromagnetic interference signal received by the receiver. Through the application, the problem that the electromagnetic interference signal cannot be effectively attenuated by quantitatively controlling the frequency jittering of the fundamental wave in the related art is solved.

The application discloses a one-way transmission electromagnetic wave Tesla valve and a design method thereof. The one-way transmission electromagnetic wave Tesla valve comprises a photonic crystal and a one-way transmission electromagnetic wave Tesla valve unit. The electromagnetic wave Tesla valve unit comprises two interference loops and a photonic crystal waveguide connected with the two interference loops. At a certain working frequency, electromagnetic wave forward transmission is allowed and reverse transmission is prevented. The method comprises the following steps: determining an analog structure, calculating a normalized photonic bandgap of the photonic crystal, frequency scanning and recording corresponding power, drawing a one-way coefficient curve, calculating a working frequency when an absolute value of the one-way coefficient is maximum, calculating an actual value of a lattice constant and obtaining an actual structure of the one-way transmission electromagnetic wave Tesla valve. The application realizes transmission of electromagnetic waves in a specific direction and prevention of electromagnetic waves in the opposite direction by using an alternating layout of multiple electromagnetic wave interference loops.

The utility model relates to the technical field of power distribution modules, in particular to an anti-explosion and anti-corrosion power distribution module which comprises a shell, a cover plate is fixedly connected to the bottom surface of the shell, a connecting shaft is rotatably connected to the position, close to the middle, of the upper end surface of the shell, and plastic plugs are fixedly installed on the positions, close to the two sides, of the upper end surface of the shell. A mounting plate is fixedly mounted in the shell, a miniature circuit breaker main body is fixedly mounted on the surface of the front end of the mounting plate, and a bearing shell is fixedly connected outside the shell. Through the arrangement of the connecting mechanism, the miniature circuit breaker main body is convenient to disassemble and assemble, and maintenance operation is convenient, so that the power distribution module is convenient to maintain; mutual interference of electromagnetic waves generated during operation of the power distribution module can be avoided through arrangement of the U-shaped protective shell, vibration force generated during operation can be buffered through resilience force of each buffer spring and each elastic sheet, and the power distribution module is enabled to operate more stably.

The invention discloses a dynamic adjustable magnetic field focusing method and system based on a phase-controlled current element array, and relates to the technical field of electromagnetic field control, and the method comprises the steps: carrying out the phase calibration of each current element in the current element array based on a target focusing position, so as to obtain a phase compensation value of each current element, the current element array comprises a plurality of current elements, determining an excitation signal of each current element based on the phase compensation value of each current element, and dynamically adjusting a phase item of each target point based on the phase compensation value of each current element and the excitation signal of each current element, so that the adjusted magnetic field is focused on a target focusing position, the target point is a target point in a magnetic field generated by the current element array. A dynamic focusing algorithm is constructed according to an electromagnetic wave interference theory and a magnetic vector superposition principle, an array unit is driven to generate a coherent superposition magnetic field by adjusting the phase and amplitude of an excitation signal in real time, and high-magnetic-field-energy dynamic focusing is realized at a target position.

The invention discloses a system and a method for expelling target navigation interfered by electromagnetic waves with specific frequency, and belongs to the technical field of navigation countermeasure. The method comprises the following steps: acquiring a bird nest coordinate set, and acquiring a stress threshold value of a bird category to which each bird nest belongs; calculating noise influence ranges from inside to outside to form a nest region influence range set; recording the model and target coordinates of the target unmanned aerial vehicle; performing space matching on the target coordinate at the current moment and the nest area influence range set, and outputting a judgment result; when the target is out of the influence range of the nest region, the output frequency is the normal interference frequency; when the target is within the influence range of the nest area, judging whether an environmental noise value is greater than a stress threshold value and whether the bird is in the nest, and performing sub-scene judgment and interference execution; in the navigation interference process, screening out the separation boundary points, and generating a predetermined trajectory; and performing navigation interference on the target based on the predetermined trajectory, and terminating the navigation interference when the current coordinate of the target is separated from the bird breeding place area.