25results about How to "Solve electromagnetic interference" patented technology

The invention relates to a radio frequency module electromagnetic compatibility analysis method and system, and the method comprises the steps: obtaining the structure data and electromagnetic parameter information of a radio frequency module, carrying out the electromagnetic simulation of the structure data based on the electromagnetic parameter information, and obtaining the corresponding simulation data of the radio frequency module; acquiring near-field scanning data of the radio frequency module, and performing correlation calculation on the near-field scanning data and the radio frequency module simulation data through a preset fully implicit frequency domain finite volume numerical algorithm to obtain corresponding far-field electromagnetic distribution characteristic data; obtaining interference emission data of the radio frequency module, and performing zero eigenvalue entropy correction to obtain corresponding interference propagation feature data; performing optimization analysis on the far-field electromagnetic distribution characteristic data and the interference propagation characteristic data to obtain corresponding initial optimization information; and performing scheme analysis on the initial optimization information and an EMC performance evaluation result to obtain a corresponding EMC optimization scheme. According to the invention, the electromagnetic characteristics of the radio frequency module can be evaluated more comprehensively, so that the accuracy of electromagnetic compatibility analysis is improved.

The invention discloses an electromagnetic interference suppression circuit and method and a power adapter, and belongs to the technical field of power adapters, the electromagnetic interference suppression circuit comprises a common mode inductor, a first end of the common mode inductor is connected to a live wire input end of the power adapter, a second end of the common mode inductor is connected to a null line input end of the power adapter, and the common mode inductor is used for generating magnetic flux; common-mode noise of the live line input end and the zero line input end of the power adapter is suppressed; the differential mode filter is connected with the common mode inductor in parallel and is used for suppressing differential mode noise between the live wire and the zero wire; and the first end of the grounding resistor is connected with the zero line input end of the power adapter, the second end of the grounding resistor is grounded, and the grounding resistor is used for providing a low-impedance path and guiding an electromagnetic interference signal passing through the input end of the power adapter to the ground. Through the combined action of the common mode inductor, the differential mode filter and the grounding resistor, the electromagnetic compatibility of the power adapter can be effectively improved, and the electromagnetic interference is reduced.

The invention provides a self-biased very-low-frequency mechanical transmitting antenna driven by piezoelectricity and a preparation method of the self-biased very-low-frequency mechanical transmitting antenna. The preparation method comprises the following steps: step 1, preparing a piezoelectric ceramic material; step 2, cutting and slotting; thirdly, resin is poured; step 4, cutting the layer sheets; step 5, packaging; step 6, polarization treatment; step 7, preparing a bonding layer; and 8, hot-pressing and compounding. Compared with an existing magnetoelectric antenna, the self-biased very-low-frequency mechanical transmitting antenna has the advantages of being self-biased, high in piezoelectric property, miniaturized, free of extra noise sources and electromagnetic interference and the like, has the advantages of being high in stress transmission efficiency, small in ohmic loss and the like, can meet the requirement for miniaturization of the magnetoelectric mechanical antenna, is easy to form a large-scale array, and is suitable for large-scale popularization and application. The magnetic emission performance under zero bias is improved, and the low-frequency communication effect is achieved.

The invention relates to an electric connector cable assembly, which is formed by lapping a flat cable cable with an electric connector, and is provided with a holding shielding carrier seat, and the holding shielding carrier seat can be used for holding the flat cable cable and the electric connector so as to prevent the flat cable cable from being separated from the electric connector. And EMI shielding can be provided at the lap joint of the electric connector and the flat cable so as to solve the problem of electromagnetic interference.

The embodiment of the present invention discloses a quad-core radio frequency coil circuit, comprising: a coil module, the coil module is used to receive a nuclear magnetic test signal and generate an induction signal according to the nuclear magnetic test signal; a front-end module, the front-end module is connected to the coil module, and is used to generate the nuclear magnetic test signal and collect the induction signal. The quad-core radio frequency coil circuit disclosed in the embodiment of the present invention, through a double-layer nested structure combination design, can emit multiple nuclide signals simultaneously or at different times for nuclear magnetic resonance imaging on the basis of a high degree of coordination with multi-frequency multi-channel electronics and timing control systems, solves the problems of interaction between different nuclides and electromagnetic interference, and realizes multi-channel multi-frequency high-uniformity radio frequency excitation and high-sensitivity signal acquisition.

The utility model relates to a new energy automobile high -voltage wire harness fixed support, for high -voltage wire harness fixed technical field, including arc line slot (101), upper fixed bolster (102) and lower fixed bolster (103), the periphery of arc line slot (101) is connected with upper fixed bolster (102), lower fixed bolster (103), and upper fixed bolster (102) and lower fixed bolster (103) are connected at the angle, arc line slot (101) is equipped with four arc channels for arranging high -voltage wire harness, the surface of upper fixed bolster (102) is equipped with the mounting hole (102 2) for connecting the car body crossbeam. The utility model discloses high -voltage wire harness fixed bolster can carry out closed protection to the high -voltage wire harness below the bolster, and arc line slot can guide high -voltage wire harness to go to the way, effectively solved the high -voltage wire harness abrasion by wind sand stone, messy and electromagnetic interference problem of arrangement.

The present application relates to an electromagnetic tripping device and a DC switch device. The electromagnetic tripping device triggers a switch action by electromagnetic force, and includes: a main coil and a main iron core; a main push rod, which can move between a main push rod extension position and a main push rod retracted position along the central axis of the main coil, and the main push rod triggers a switch action at the main push rod extension position; a control coil and a control iron core, the control coil can receive current to generate a control magnetic field; the control push rod, which can move between a control push rod extension position and a control push rod retracted position along the central axis of the control coil, wherein the control iron core can push the control push rod from the control push rod retracted position to the control push rod extension position under the action of the electromagnetic force of the control magnetic field, and wherein, the control push rod drives the main push rod from the main push rod retracted position to the main push rod extension position during the process of the control push rod moving from the control push rod retracted position to the control push rod extension position. This scheme improves the operating reliability of the electromagnetic tripping device.

The present application provides a low noise amplifier gain fluctuation measurement system, which includes a phase modulator configured to up-convert the above-mentioned amplified microwave signal carrying the low-frequency component from the microwave domain to the optical domain based on the measurement optical carrier provided by the seed laser, and output the measurement optical signal after up-conversion; an optical filter configured to allow the first-order single sideband of the measurement optical signal of a specific angular frequency to pass; and down-convert the filtered measurement optical signal, perform analog-to-digital conversion and collect the difference frequency measurement signal output generated by the down-conversion, and process the difference frequency measurement signal output data obtained by the collection, so as to obtain the data detection, collection, and processing module of the fluctuation of the gain fluctuation of the low noise amplifier in time and / or frequency. The present application also discloses a corresponding method. The system or method of the present application can overcome the electromagnetic interference problem by up-converting the microwave signal to the optical domain.

The utility model relates to a middle connecting plate of a transmission, the transmission and a vehicle, and the middle connecting plate comprises a middle connecting plate body which is provided with a first shaft through hole and a second shaft bearing mounting hole; the first valve plate and the middle connecting plate body are integrally formed, the first valve plate is provided with a first surface, a plurality of oil cavities are formed in the first surface, and the first valve plate is in surface-to-surface fit with the second valve plate. The first valve plate is integrated on the middle connecting plate body, so that the integration level can be improved, and the lengths of the middle connecting plate and the second valve plate in the thickness direction can be shortened; an oil cavity is adopted to replace a slender oil duct, the oil cavity is small in depth, large in size area, better in castability than the oil duct and good in product casting quality, the first valve plate and the second valve plate are matched in a face-to-face mode, the leakage risk is reduced, the number of the oil ducts in the middle connecting plate body is reduced, and the space occupied by auxiliary holes and a plugging structure and the number of plugging parts can be reduced; the overall dimension of the middle connecting plate is reduced, product cost is reduced, and reliability is improved.

The invention discloses a novel energy-saving carbon-reducing overhead rail suspension type train wiring structure which is characterized in that the front end and the rear end of each section of train are provided with the same bogie structure, high-voltage and low-voltage wire harnesses are converged to connectors on bogies through different paths to realize butt joint, and cables from a train roof to the bogies are respectively connected according to the high-voltage side and the low-voltage side through special connecting rods. In order to prevent electromagnetic interference, a high-voltage alternating-current wire adopts a cable with a shielding layer, a low-voltage wire harness is sleeved with a shielding hose, two layers of wiring boards capable of being independently detached are installed on apron boards on the two sides of the top of the vehicle, and different cables are laid on the high-voltage side and the low-voltage side in a layered mode. One end of the high-voltage side and one end of the low-voltage side are respectively provided with a high-low-voltage junction box and a low-voltage junction box, wire harnesses are converged to corresponding wiring cabins, holes are formed in the junction boxes for passenger rooms, and cables are connected with passenger room equipment. And a vehicle end wire clamping plate is arranged above the soft channel between adjacent vehicles to fix the wire harness between the box bodies. The wiring structure meets vibration, electromagnetic compatibility and railway wiring standards, the limited space is effectively utilized, and the stability and safety of train operation are improved.

The invention relates to the technical field of medical equipment, in particular to a nerve regulation multi-mode anti-depression therapeutic apparatus, and aims to solve the problem that depression treatment generally only relates to a single treatment means in the prior art. According to the scheme, multi-modal data are dynamically adjusted through real-time collection and analysis of the electroencephalogram signals so as to achieve personalized depression treatment, and the multi-modal data comprise the electroencephalogram signals, the stimulation frequency or intensity of transcranial magnetic stimulation, the stroboscopic frequency, the illumination intensity, the illumination color, the music rhythm, the music frequency band and the volume. Besides, according to the scheme, through an innovative artifact elimination algorithm and an electromagnetic shielding technology, the accuracy of EEG signal acquisition is greatly improved, and the problem that an existing TMS and EEG combined device is often subjected to electromagnetic interference and artifacts is solved.

Embodiments of the present application provide a kind of board level structure and electronic equipment, it is related to electronic equipment technical field.The board level structure includes substrate, camera module, power supply wiring and suspension coil.Wherein, power supply is equipped on substrate.Cameras module is set to substrate, and cameras module includes magnetic component.At least part of power supply wiring is located at the outside of cameras module.At least part of suspension coil is located between cameras module and power supply wiring, when power supply inputs periodic variation input current to power supply wiring, coupling current with input current frequency same, opposite direction is generated in the suspension coil between cameras module and power supply wiring.The board level structure can reduce the electromagnetic interference that power supply wiring generates to the magnetic component in cameras module by setting suspension coil, and it is convenient to wiring, can solve the problem of higher difficulty in wiring in related art.

The invention relates to the technical field of pure electric commercial vehicle chassis, and particularly discloses a pure electric commercial vehicle cabin modular arrangement method, which comprises the following steps: S1, defining a single-layer tiled arrangement principle, and mounting chassis accessories on a vehicle chassis frame; s2, defining a high-pressure interface and a low-pressure interface of the controller by adopting a high-low pressure separation principle; s3, defining an interface standardization principle, and performing integrated management on a low-voltage wire harness and a brake pipeline interface; s4, a cabin module integral split charging scheme is adopted for installation; high integration and modularization of cabin module accessories and interfaces are achieved, it is guaranteed that a controller and the accessories are not shielded up and down, meanwhile, cab assembly positioning is reduced, the cab internal space is increased, the modularization degree of a vehicle is improved, connector varieties are reduced, the reliability of the whole vehicle is improved, and offline split charging of the cabin module is achieved; according to the scheme, the process scheme that all current parts of a new energy vehicle model are independently assembled is broken through, and the whole vehicle assembling efficiency is improved.

The utility model relates to the technical field of medical instrument fluid control, in particular to a structure for controlling on-off of multiple channels. The multi-channel flow channel on-off control structure comprises a base plate and a pressing plate, a fixing seat is arranged on the upper plate face of the base plate, and a fixing frame is connected to the lower plate face of the base plate. A multi-channel assembly is arranged on the fixed seat and comprises a plurality of hoses; a rotating column is rotationally connected into the fixing base, a plurality of liquid passing grooves are formed in the outer wall of the rotating column in the length direction in a staggered mode, and the hoses abut against the liquid passing grooves; the liquid passing groove can be matched with the hose to ensure that liquid passes through smoothly; the rotating column is powered by a driving mechanism to rotate; the pressing plate is fixed on the fixed seat through the pressing mechanism; a sliding hole is formed in the pressing plate, and a meshing assembly is arranged in the sliding hole; the occlusion assembly abuts against the hose so as to ensure that when the liquid passing groove rotates away from the hose, liquid can be prevented from passing through the hose. Under the mute condition, the synchronous control of the multi-channel fluid pipeline can be realized under the driving of the same power source.

The invention relates to the technical field of 5G communication modules, in particular to a 5G communication module integrated antenna system and a use method thereof.The 5G communication module integrated antenna system comprises a 5G communication module with a built-in signal filter and a built-in power filter; an integrated antenna system with conductive foam wrapped outside an antenna, an industrial control system and a sensor with a shell adopting a conductive coating for electromagnetic shielding, an anti-interference element with a common mode choke added in a signal line and a power line, and a frequency spectrum management module for dynamically adjusting a 5G communication frequency band and avoiding interference; according to the 5G communication module integrated antenna system, the problem of electromagnetic interference of a 5G communication module integrated antenna system to nearby industrial control systems and sensors in application of the industrial Internet of Things can be effectively solved, and the service life of the 5G communication module integrated antenna system is prolonged. High-speed 5G network connection of industrial Internet of Things equipment is realized, and industrial automation and remote monitoring are supported.

The application discloses an electronic device, comprising a shell, an electro-deformation driving part, a motion base, a mass block, a power supply module and a control module, wherein the electro-deformation driving part, the motion base and the mass block are arranged in the shell, the electro-deformation driving part is arranged between the shell and the motion base, the electro-deformation driving part and the mass block are respectively located on two sides of the motion base, the electro-deformation driving part and the mass block are distributed in a staggered manner, the control module is electrically connected with the power supply module and the electro-deformation driving part, and when a voltage is applied to the electro-deformation driving part, the electro-deformation driving part drives the motion base to drive the mass block to move. The above scheme can solve the problem of electromagnetic interference of the vibration motor in the electronic device.

The present invention relates to the field of optical fiber communication technology, and discloses an optical fiber connector and an optical fiber connection structure. Through the creation of the present invention, a new optical fiber connector design scheme that can be unlocked based on a rotating structure is provided, that is, by designing a lock clamp buckle installed on the outside of a connecting shell into a front probe arm that can not only utilize the elastic deformation recovery effect to achieve locking and fastening with the locking structure on the adapter side, but also utilize the seesaw principle to achieve frictionless unlocking of the latch buckle and the locking structure on the adapter side, on the one hand, it can ensure that the locking relationship between the latch buckle on the connector end and the locking structure on the adapter end is fastened, and on the other hand, during the unlocking process, the latch buckle and the locking structure are gradually disengaged from each other, resulting in a gradual reduction in friction, thereby avoiding mechanical wear on the locking component during the unlocking process, extending the service life of the connector, and ensuring the coupling accuracy of the connector and the adapter during subsequent connection and use, as well as the optical fiber communication transmission effect.

The embodiment of the invention provides a filtering power supply for an EMC test of an aerospace product, and the power supply is characterized in that the power supply comprises a safety module, a control conversion module, and a rear filtering module; the input end of the safety module is suitable for AC power supply electrical connection. The output end of the safety module is electrically connected with the input end of the control conversion module; the output end of the control conversion module is electrically connected with the input end of the filter circuit; the safety module is used for protecting surge interference of the control conversion module and filtering electromagnetic pollution generated when the control conversion module works, and the control conversion module is used for receiving the alternating current of the safety module and converting the alternating current into direct current; and the rear filtering module is used for filtering the direct current output by the control conversion module. Therefore, the problem of electromagnetic interference of a universal power supply in the anechoic chamber or the problem that some tests cannot be realized due to interference of power supply resonance and low-voltage large current outside the anechoic chamber and large power supply ripple on EUT can be solved.

The utility model belongs to the technical field of detachable electromagnetic shielding nets, and particularly relates to a novel industrial personal computer interface electromagnetic protection device which comprises a main machine body, a mounting cabin and a rivet nut column are arranged on the side wall of the main machine body, a rear window baffle is arranged at the rear end of the main machine body, and conductive foam is arranged on the side wall of the rear window baffle. According to the utility model, the structural design is ingenious and reasonable, the main machine body is provided with the installation cabin and the pressing rivet nut columns, the rear window baffle is fixed in the installation cabin through screws, the glue-containing side of the conductive foam is correspondingly pasted on the rear window baffle, and the main control board is fixed on the main machine body through screws. The main machine body, the rear window baffle, the conductive foam and the main control board form a metal shielding isolation surface, so that the influence of external interference on product performance is reduced, the problem of electromagnetic interference is solved, and normal operation of equipment is ensured.

The utility model provides a PTC heater improves EMC performance through shielding layer ground connection, including PTC heater body and high pressure connector, low pressure connector, high pressure connector connects PTC heater body through high pressure wire harness, and low pressure connector connects PTC heater body through low pressure wire harness, and the high pressure wire harness includes copper wire layer, insulating layer, shielding layer and insulating rubber layer from inside to outside, and the shielding layer is connected with the whole car ground wire through the ground wire, the utility model discloses a third layer shielding layer of PTC heater high pressure wire harness is connected with the whole car ground wire, and the electromagnetic electricity that shielding layer absorbs is conducted to the whole car ground wire, thereby unloading electricity, thoroughly eliminates PTC to the radiation of whole car and the radiation influence of whole car to PTC, and wiring is simple and convenient, not only solves the electromagnetic interference problem of PTC high pressure wire harness to whole car, but also improves EMC performance, can be used on the PTC heater in new energy automobile air conditioning, and the scope of application is wide.

The invention discloses a load parameter estimation method of a magnetic coupling resonant wireless power transmission system. The method comprises the following steps: when direct-current input voltage is converted into high-frequency alternating-current voltage through an inverter circuit to act on a resonant circuit and then supplies power to a load through a rectifier and filter circuit, acquiring a phase difference between a voltage vector and a current vector of a resonant cavity at a transmitting end, and judging whether the phase difference is zero or not, the resonant circuit comprises a transmitting end resonant cavity and a receiving end resonant cavity; and when the phase difference is not zero, the frequency of the switching tube driving signal is adjusted in real time according to the phase difference based on an automatic tuning technology until the phase difference between the voltage and the current of the transmitting end resonant cavity is zero. According to the invention, the technical problems of high cost, large electromagnetic interference, complex control method and limited working conditions of the load parameter estimation method of the magnetic coupling resonant wireless power transmission system in the prior art are solved.

The invention discloses a synchronous electric drive NVH optimization method, device and equipment and a medium, and the method comprises the steps: obtaining the reference frequency of a vehicle motor in a vehicle operation process, and judging whether the reference frequency is in a preset variable carrier frequency region or not; if yes, randomly generating a first random number, and determining a random carrier frequency according to the first random number, the reference frequency and a set carrier frequency change amplitude; according to the first random number, the random carrier frequency and a set carrier amplitude, determining a first loading slope of a first half period carrier and a second loading slope of a second half period carrier in a current carrier period to obtain a first carrier; and comparing the first carrier wave with a first modulated wave, and outputting an optimized PWM signal, the first modulated wave being generated according to the first carrier wave.

The present invention relates to the field of micro switch technology, and in particular to a fast-response micro switch and a method of using the same, which solves the problems of slow response speed, fast contact wear and high energy consumption of micro switches in the prior art. A fast-response micro switch and a method of using the same, including a housing, a pressure rod, a common end plate, a normally open end plate and a normally closed end plate, realizes fast opening and closing and rotation of contacts through an air supply structure and a two-position switchable contact structure, significantly improves the response speed and stability of the micro switch, prolongs the service life of the contacts, and reduces energy consumption. The present invention achieves the technical effect of improving the response speed, reliability and economy of electronic equipment and control systems.

The application provides an optical fiber communication and sensing integrated system and method, and relates to the technical field of optical communication networks.The system comprises an optical master control module, an optical distribution network module, an optical execution module and an optical sensing module; the optical master control module is connected with the optical execution module and the optical sensing module through the optical distribution network module; the optical master control module is used for transmitting a composite optical signal to a backbone optical fiber, receiving and demodulating an uplink communication signal and a reflected sensing signal; the optical distribution network module is used for distributing the composite optical signal to a communication branch of the optical execution module and a sensing branch of the optical sensing module through an optical distribution and combination component; the optical execution module is used for accessing the communication branch, parsing a control instruction from a downlink communication signal to drive a local actuator to act, and uploading state data to the optical master control module; and the optical sensing module is used for accessing the sensing branch, sensing a physical state change of a measured part as a passive sensing terminal, and returning the reflected sensing signal to the optical master control module along an original optical path.

The utility model discloses a quantum computing system and nuclear magnetic resonance quantum computer, this quantum computing system includes: main resonance coil, probe resonant circuit, main control module, magnet module and sample module, probe resonant circuit includes first varactor diode circuit, first varactor diode circuit one end connects main resonance coil, and the other end ground connection, sample module is equipped with the sample of quantum bit carrier, main resonance coil is connected with main control module, and is set between main control module and sample module, main resonance coil is used for inducting the first nuclear magnetic signal of atomic nucleus in the sample of quantum bit carrier as quantum bit when happening nuclear magnetic resonance, main control module connects first varactor diode circuit, is used for sending first bias voltage signal for adjusting the resonance frequency of main resonance coil to first varactor diode circuit. Based on varactor diode circuit and bias voltage signal, realize resonance frequency adjustment.