54 results about "Wave resonance" patented technology

The invention discloses a wind turbine generator impeller anomaly detection method and system based on sound vibration signal identification. According to the method, firstly, impeller response is collected through a microphone / vibration sensor, and a Mel spectrogram is generated; then, a Teager-Kaiser energy operator and self-correlation analysis are utilized, and under the condition of not depending on a rotating speed signal, the rotating period of the impeller is recognized, and frequency spectrum segmentation is carried out; calculating a cross-period Mel frequency spectrum dynamic deviation, and normalizing the cross-period Mel frequency spectrum dynamic deviation through an amplitude correction coefficient related to the rotating speed; generating a periodic coherent energy diagram by adopting an improved structural similarity algorithm; performing filtering enhancement by using a harmonic resonance template, performing morphological deconstruction and parameterization on an abnormal region in the graph, and extracting geometric features; and finally, calculating a comprehensive abnormal score based on the multi-dimensional features and realizing automatic early warning. According to the method, the problems of variable working condition interference and rotating speed dependence are effectively solved, and accurate and stable detection of early abnormality of the impeller can be realized.

The invention provides a sleep assisting system based on photoacoustic magnetic vibration wave resonance, and relates to the technical field of sleep assisting. The system comprises an acquisition unit, a processing unit, a stimulation unit and an evaluation feedback unit. Determining a sleep stage of the user, analyzing phases of multi-scale electroencephalogram rhythm components such as slow waves and spindle waves in a cross-scale manner, and extrapolating and predicting a phase value of a target electroencephalogram rhythm at a future moment in combination with a recent phase trajectory; taking the predicted phase as a target state, mapping a rising / falling slope of a slow wave form into an intensity change parameter of photoacoustic and magnetic vibration stimulation by constructing a mapping channel, and selecting an optimal stimulation combination for output through a decision model based on the intensity change parameter; calculating a phase locking effect index, and adjusting a phase prediction model parameter by using an optimization algorithm according to the index so as to optimize subsequent stimulation; and linkage regulation and control of an external environment are supported, and centralized monitoring of sleep states of multiple users can be realized. According to the invention, self-adaptive guidance of sleep brain rhythms is realized, and the sleep quality is effectively improved.

The invention provides a short bolt axial stress detection method and device based on electromagnetic ultrasonic resonance, and relates to the technical field of industrial fastener stress detection. The method comprises the following steps: determining a preset period and frequency of an excitation signal according to material characteristics of a to-be-measured short bolt, and calibrating resonant frequency and stress to obtain a calibration curve; classifying the lengths of the short bolts to be measured to obtain bolts with known original lengths and in-service bolts with unknown original lengths; based on the determined preset period and frequency, first-order resonant frequency corresponding to the bolt with the known original length is obtained through an electromagnetic ultrasonic transducer and a single-wave resonance method; based on the determined preset period and frequency, first-order resonant frequency corresponding to the in-service bolt with the unknown original length is obtained through an electromagnetic ultrasonic transducer and a double-wave resonance method; and calculating the axial stress of the corresponding short bolt to be measured according to the calibration curve and the first-order resonant frequency. The problems that in the prior art, the energy conversion efficiency is low, and the short bolt detection effect is poor are solved.

The invention relates to the technical field of bedding, and discloses a negative oxygen ion superposition sound medicine system and a biological wave resonance brain wave pillow capable of helping sleep, and the system is composed of a negative oxygen ion generation module, a sound medicine playing module, an intelligent control module and a user feedback module. Audio with specific frequency and sound is played through the sound and medicine playing module, natural sound or soothing music is beneficial to soothing the nervous system of a user and promoting relaxation and sleep, the audio playing quality and effect are ensured through audio signal spectrum analysis and sound waveform description, the audio signals are in a proper frequency range, and the audio playing effect is improved. The sleep state and demand of the user are identified through physiological data monitoring and data analysis, and the improvement suggestions are provided according to the data, so that the system function is optimized, the sleep quality of the user is improved, and the beneficial effect that the pillow is assisted to enable the user to quickly fall asleep is achieved.

The utility model discloses a waste collecting device after physical wave resonance cleaning, which belongs to the technical field of cleaning and comprises an ultrasonic cleaning machine, a control panel mounted on the outer wall of the ultrasonic cleaning machine and a supporting plate mounted at the top of an inner cavity of the ultrasonic cleaning machine and provided with a through hole. A semicircular groove is formed below the supporting plate, wing plates arranged at an angle are symmetrically and fixedly connected between the semicircular groove and the inner wall of the ultrasonic cleaning machine, and a rotating shaft with the end rotationally connected with the ultrasonic cleaning machine is arranged on the inner side of the semicircular groove. The outer wall of the rotating shaft is fixedly connected with a spiral blade with the outer diameter matched with the inner diameter of the semi-circular groove, the rotating shaft is driven to rotate by starting the driving motor, so that waste materials located in the semi-circular groove are conveyed by the spiral blade to be discharged through the discharging opening and finally fall into the collecting box, the waste materials are intercepted through the filter screen, and solid-liquid separation is achieved; and the tedious operation of manual cleaning is omitted.

The application provides a device and method of fusing radar radio frequency induction and heterogeneous interface coupling technology, through an electromagnetic super surface pattern array antenna with metal characteristics on the inner surface of the heterogeneous interface, a fixed module is bonded around the electromagnetic super surface pattern array antenna, the fixed module and the electromagnetic super surface pattern array antenna jointly form a closed electromagnetic wave resonance cavity region, a high polymer medium material for radiating and conducting electromagnetic waves is built-in, and a radar radio frequency induction control system; electromagnetic waves emitted by a radar microstrip antenna are repeatedly reflected, superimposed and enhanced in the electromagnetic wave resonance cavity region through the high polymer medium material, and then radiated to an external space induction area of the heterogeneous interface through the electromagnetic super surface pattern array antenna, so that activities or micro-motion targets in the induction area range are detected, and a double threshold control logic output control instruction is adopted to improve the induction and control precision of the radar induction system.

A method for feeding pressurized air pulses to a quarter wave resonance tube, for generating a standing low-frequency sound wave in said quarter wave resonance tube. The method entails that the pressurized air pulses supply maximum input power to said standing low-frequency sound wave by feeding said pressurized air pulses only during the time intervals of the oscillation cycle when the air pressure in said rear end of the quarter wave resonance tube, is positive. Also disclosed is a revolving valve, for feeding pressurized air pulses to a quarter wave resonance tube, for generating a standing low-frequency sound wave in said quarter wave resonance tube.

The present invention provides a test system and method for measuring the linewidth of non-linear excited spin-wave resonance under vertical parametric pumping based on a microstrip line. The test system is as follows: A microwave source is connected to a power amplifier; the power amplifier is connected to one end of the microstrip line; a sample to be tested is placed on the microstrip line, and an external magnetic field is applied to the sample by an electromagnet, with the magnetic field direction perpendicular to the long axis direction of the microstrip line; the other end of the microstrip line is sequentially connected to a power attenuator, a detection diode, and a lock-in amplifier; and a computer terminal is connected. The test program is based on a LabVIEW control program, which regulates the magnetic field intensity of the electromagnet, real-time collects the amplitude of the output signal of the lock-in amplifier, and dynamically plots the voltage-magnetic field intensity relationship curve; when the microwave power is increased until the waveform undergoes non-linear distortion, the spin-wave resonance linewidth is calculated using a formula according to the critical microwave power and the threshold radio frequency magnetic field amplitude. Advantages: It realizes the measurement of the non-linear spin-wave resonance linewidth in an ultra-wide frequency band and with low power detection, improving the detection accuracy and operation efficiency.

A Josephson traveling wave parametric amplifier (JTWPA) comprising an input for receiving a signal, an output for providing an amplified output of the signal and one or more circuit segments in series between the input and the output and is configured for receiving a pump tone for transferring energy from the pump tone to the signal and to an idler tone. Each of the one or more circuit segments comprises, in series, one or more superconducting nonlinear elements in series, and a first resonator with a first fundamental resonance frequency configured for phase matching the pump tone with the signal and the idler tone and a second resonator with a second fundamental resonance frequency configured for mitigating pump depletion at a frequency corresponding to a higher harmonic of the pump tone with the second fundamental resonance frequency being higher than the first fundamental resonance frequency.

The invention discloses an energy-saving offshore oil platform crude oil recovery device which comprises a treatment tank, a cover body is placed at the top of the treatment tank, the left side and the right side of the top of the cover body are connected with an air suction pipe and a liquid suction component respectively, a metering pump is installed on the rear side of the top of the cover body, and a filling pipe is arranged in the center of the top of the treatment tank. Through cooperative use of the treatment tank, the connecting ring plate, the cover body, the filling pipe, a liquid outlet pipe, a metering pump, a liquid drawing pipe, a liquid pumping component and a stirring component, the device has the advantage of providing a closed recycling environment, and the top of the treatment tank can be sealed, so that when the treatment tank shakes, liquid in the treatment tank cannot overflow; the use environmental protection property of the offshore oil platform is improved; furthermore, the upper and lower honeycomb-shaped guide plates are used, so that the water body can be divided into small units to flow, and the wave resonance is inhibited; and through the rubber shock insulation pad, the vibration transmission efficiency between the recovery device equipment and the offshore oil platform deck is reduced.

The invention provides a process for synthesizing ammonia through nitrogen electroreduction assisted by sound wave resonance, belongs to the technical field of new energy catalysis and green nitrogen circulation, and is particularly suitable for converting nitrogen (N2) into ammonia (NH3) through an electrochemical mode at normal temperature and normal pressure. According to the process, an efficient electro-catalysis electrode is designed, a piezoelectric transducer is introduced to apply sound wave excitation with a specific frequency (2-8 MHz), and an electric field and a sound field have a synergistic effect, so that the adsorption and activation capability of a catalyst on nitrogen is remarkably improved, the electron transfer efficiency is enhanced, and the generation rate and selectivity of ammonia are effectively improved. After a piezoelectric transducer is adhered to the back of an electrode, sound wave excitation is applied through an external signal source, a micro-scale cavitation effect and shear disturbance are generated on an electrolyte interface, N is equivalent to N bonds are destroyed, and generation of ammonia molecules is promoted. The process is operated at the potential of-0.2 to-0.6 V (vs RHE), the ammonia generation rate can exceed 5 [mu] g.h <-1 >. Cm <-2 >, and the Faraday efficiency is higher than 15%. Compared with a traditional pure electro-catalysis nitrogen reduction method, the method has the advantages that the ammonia generation rate is remarkably increased, the competitive hydrogen evolution reaction (HER) is effectively inhibited, and the stability of a catalyst interface is improved. In addition, the catalytic material used in the process is wide in source and simple and convenient in assembly mode, and can be compatible and integrated with the existing electrolytic tank module. The technology has a wide application prospect, is particularly suitable for distributed green ammonia synthesis, organic nitrogen fixation and carbon neutralization energy systems, and has important scientific research value and industrial transformation potential.

The invention relates to a compressor torque compensation method and variable frequency air conditioning equipment. The method comprises the steps that vibration acceleration frequency spectrums of a compressor in multiple directions under adjacent operation frequencies are obtained, the vibration acceleration frequency spectrums comprise vibration acceleration amplitude values under a fundamental wave frequency and a harmonic wave frequency, and according to the vibration acceleration amplitude value change trend of the fundamental wave frequency or the harmonic wave frequency under the adjacent operation frequencies, the vibration acceleration frequency spectrums of the compressor in multiple directions are obtained; and judging whether the compressor generates fundamental wave resonance or harmonic wave resonance at the current operation frequency, determining a torque compensation strategy according to the resonance mode and the resonance direction under the condition of judging that the compressor generates fundamental wave resonance or harmonic wave resonance at the current operation frequency, and executing the torque compensation strategy in a resonance frequency range containing the current operation frequency, and torque compensation current is determined, and torque compensation is conducted on the compressor according to the torque compensation current. By the adoption of the method, directional and accurate vibration suppression can be achieved, and the compensation effect is remarkably improved.

The invention relates to the field of multi-mode resonance, in particular to a target object data acquisition system based on photoacoustic magnetic vibration wave resonance, and the system comprises a data acquisition module which is used for obtaining neural response data when a target object receives single stimulation; the nerve response relation generation module is used for acquiring a nerve response relation stimulated by the opto-acoustic magnetic vibration waves; the mismatch result generation module is used for calculating a starting time mismatch component, a stimulation intensity mismatch component and a continuous coverage mismatch component of the photoacoustic magnetic vibration wave stimulation to form a mismatch result of the photoacoustic magnetic vibration wave stimulation; the differential compensation control parameter set generation module is used for generating a differential compensation control parameter set; and the multi-mode collaborative stimulation output module is used for performing collaborative control on light stimulation, sound stimulation, magnetic stimulation and mechanical vibration stimulation to form light-sound-magnetic vibration wave resonance stimulation. According to the system, effective resonance of different stimuli is realized, and the collaborative perception ability and nerve response stability of a target object to multi-modal stimuli are enhanced.

The present application belongs to the technical field of offshore engineering equipment design and manufacturing, and discloses a high-efficiency floating breakwater based on a Helmholtz water wave resonance cavity, which comprises a Helmholtz resonance cavity breakwater main body, a pile foundation and a non-powered lifting limiting auxiliary device. The breakwater main body is affected by tides or waves, and the change in sea level height leads to a change in buoyancy. The non-powered lifting limiting auxiliary device is used to realize lifting adjustment and self-position adjustment to ensure the wave-absorbing effect. The limiting hole and the limiting platform on the pile foundation constrain the position of the breakwater main body. The present application uses a Helmholtz resonance cavity and a local resonance type artificial periodic structure formed by the periodic arrangement of multiple Helmholtz resonance cavities, which can increase the wave-absorbing frequency band. The periodic arrangement of the Helmholtz resonance principle is an effective way to reduce and absorb long waves, and has the advantages of simple structure, excellent performance, strong modularization and significantly improved wave-absorbing performance when the Helmholtz resonance cavities with the same volume are arranged periodically.

The invention relates to the field of data security transmission methods, in particular to a data security transmission method and system for a vehicle-mounted OBU, and the method comprises the steps: collecting a sound wave signal in a vehicle in real time through a vehicle-mounted OBU microphone array, loading the sound wave signal to a first analysis model, and obtaining a target sound wave feature; comparing and judging the target sound wave characteristics with a preset pet sound wave resonance characteristic template stored in a local on-board unit (OBU) through a second analysis model, performing interference signal filtering on the pet sound waves to obtain filtered OBU data when the target sound wave characteristics accord with the preset pet sound wave resonance characteristic template, and performing encryption processing on the filtered OBU data, the encrypted data is safely transmitted to the background server in a wireless communication mode, so that the problem of data safe transmission caused by voiceprint false triggering is solved.

The present application discloses a method, device, medium and product for analyzing the harmonic resonance characteristics of cylindrical bubbles, which relates to the field of fluid mechanics technology. The method includes: constructing a dimensionless bubble wall motion equation and a second-order accuracy analytical solution model when a cylindrical bubble undergoes harmonic resonance with an external acoustic excitation; harmonic resonance includes: 2nd-order superharmonic resonance and 1 / 2-order subharmonic resonance; based on the Lyapunov stability theory and the Routh-Hurwitz stability criterion, the dimensionless bubble wall motion equation and the second-order accuracy analytical solution model when a cylindrical bubble undergoes harmonic resonance with an external acoustic excitation are quantitatively analyzed for the local stability of the steady-state oscillation solution and the global stability of the bubble oscillation, and analysis results are obtained; based on the analysis results, the influence mechanism of the core parameters on the harmonic resonance characteristics of the cylindrical bubble is determined. The present application realizes the precise analysis of bubble oscillations and analyzes the local stability and global stability of bubble oscillations.

This application belongs to the technical field of oil and gas exploration, and specifically relates to a hydraulic fracturing monitoring method based on Krauklis wave resonance, aiming to solve the problem of poor monitoring effect during the hydraulic fracturing process. It includes: obtaining the vibration signal of the target well during the hydraulic fracturing process; extracting multiple sub-signal segments of the vibration signal according to time sequence, and performing time-frequency analysis on each sub-signal segment using the short-time Fourier transform to obtain the time-frequency spectrogram of the vibration signal; obtaining the resonance energy amplitude statistical chart of the vibration signal; when the resonance energy amplitude statistical chart meets the preset conditions, it is determined that the hydraulic fracturing is successful, where the preset conditions include: after the average value of the resonance energy amplitude within the set duration changes from the first amplitude to the second amplitude, it remains within the set range centered on the third amplitude, and the second amplitude is higher than the first amplitude and the third amplitude. This application can intuitively and quickly evaluate the hydraulic fracturing process and realize the dynamic monitoring of the hydraulic fracturing process.

The invention discloses a gear fault detection method, system and device and a storage medium, and the method comprises the steps: obtaining a vibration signal and an impact signal of a gear, determining the frequency spectrum characteristics of a meshing frequency and each sideband frequency, and the frequency spectrum characteristics of a shaft rotation frequency, and determining whether the gear has traveling wave resonance or not according to the frequency spectrum characteristics of any sideband frequency, and determining whether the gear has a fault according to the spectrum characteristics of the shaft rotation frequency and the spectrum characteristics of the meshing frequency. If the frequency spectrum characteristic of the sideband frequency accords with the preset traveling wave resonance characteristic, it can be determined that the meshing state of the gear is abnormal, and it can be further determined that the traveling wave resonance mode of the gear is excited, that is, traveling wave resonance exists in the gear; according to the method, when the frequency spectrum characteristics of the shaft rotation frequency and the meshing frequency meet the preset fault characteristics, it is determined that the gear has the fault, by determining that the gear has traveling wave resonance and / or has the fault, the running state of the gear can be conveniently adjusted in time, it is avoided that the gear works under the rotating speed condition capable of causing poor resonance, and maintenance is conducted in time.

The invention provides a preparation method of a crack-free high-density high-toughness base alloy component formed by acoustic resonance assisted LED (Light Emitting Diode), which comprises the following steps: carrying out ultrasonic dispersion treatment on nano WC (Wolfram Carbide) particles, and then drying to obtain the nano WC particles subjected to ultrasonic dispersion treatment; micron-sized base alloy powder and nano WC particles subjected to ultrasonic dispersion treatment are evenly mixed, so that the surface of the micron-sized base alloy powder is evenly wrapped with the nano WC particles, and composite powder is obtained; and the composite powder is subjected to laser melting deposition through laser directional energy deposition equipment, and sound wave resonance treatment is conducted on high-temperature melt in the deposition process. The invention further provides a crack-free high-density high-toughness base alloy component prepared through the method. According to the method, the crack-free high-density high-toughness base alloy component can be prepared through acoustic resonance assisted LDED forming, and the method is suitable for high-performance integrated manufacturing of aero-engine hot end key components.

The invention provides an aviation gear resonance prediction and vibration absorption method based on a traveling wave resonance theory, and relates to the technical field of aviation gear vibration noise. According to the method, based on the gear traveling wave resonance principle and traveling wave resonance characteristics, test analysis is carried out on the aspects of gear structure vibration dynamic characteristics, loading, strength and the like aiming at the phenomenon that the radial plate of the high-speed thin-radial-plate straight gear is fractured, and the vibration characteristics of the thin-radial-plate straight gear during traveling wave resonance are described; a theoretical formula of composite traveling wave resonance is deduced on the basis of experimental data and an existing basic traveling wave resonance theory, a vibration characteristic rule of the composite traveling wave resonance is further revealed by using the formula in a deep level, finally, improvement suggestions are put forward for the structure of the straight gear, and the composite traveling wave resonance formula of the thin radial plate straight gear is verified again.

The application discloses a low-profile reflective array antenna with gain filtering characteristics and dual linear polarization independent control. The application comprises a planar reflective array composed of a plurality of reflective units, a horn antenna; the reflective unit comprises a magnetic electric dipole loaded with a split ring resonator, an x polarization feeding part and a y polarization feeding part, each feeding part comprises an independent feeding arm and an open metal microstrip line patch, the feeding arm and the open metal microstrip line patch are connected through a metallized via hole, the energy received by the magnetic electric dipole can be coupled to the feeding arm within the working band, the energy is transmitted from the feeding arm to the open metal microstrip line patch through the metallized via hole, and reflection occurs at the open metal microstrip line patch, so the reflection phase can be changed by adjusting the length of the open metal microstrip line patch. At a low frequency, a radiation zero point is introduced by using the characteristics of the magnetic electric dipole, and at a high frequency, a radiation zero point is introduced by using the half-wave resonance characteristics of the split ring resonator, so that the filtering characteristics are realized.

The invention relates to a pressure wave resonance excitation open type full-bore lower casing floater and an opening method, the floater comprises a pressure oscillation generating device, a casing string and a floating coupling, and the pressure oscillation generating device is communicated with the casing string through a pipeline; the floating coupling is mounted on the casing string, and two ends of the floating coupling are respectively communicated with the casing string; a glass plate is fixedly installed in the floating coupling, and the space in the floating coupling is divided into two independent parts through the glass plate. The opening method is simple and reasonable in design, the glass plate can be exploded and broken from the inside by energy generated by oscillation wave resonance emitted by the pressure oscillation generating device, the whole glass plate is broken in an explosion mode, chippings are extremely small and completely broken, no cavity is generated in the middle, the chippings do not block a casing pipe and other downhole tools, and the service life of the casing pipe is prolonged. The problems that according to a traditional casing running floater, a mud replacing rubber plug is hung and clamped, opening is conducted in advance, opening cannot be conducted, chippings are large after opening is broken, and well cementation is complex due to blocking of other underground tools are effectively solved.

This invention provides a photovoltaic module cleaning system and method based on multi-band acoustic wave resonance, relating to the field of photovoltaic power generation cleaning technology. The system includes an acoustic wave generating array, an infrared thermal imager, a microphone array, and a controller. The acoustic wave generating array, infrared thermal imager, and microphone array are all electrically connected to the controller. The infrared thermal imager is used to monitor the temperature distribution on the surface of the photovoltaic module, and the microphone array is used to monitor the acoustic wave distribution on the surface of the photovoltaic module. The controller controls the acoustic wave generating array to emit multi-band acoustic waves with frequencies ranging from low to high onto the surface of the photovoltaic module to excite dust particles of different sizes on the surface of the photovoltaic module to resonate. The controller also controls the acoustic wave parameters of the multi-band acoustic waves according to the temperature distribution and / or acoustic wave distribution. Based on the principle of multi-band acoustic wave resonance, this invention can achieve efficient, non-destructive, and zero-water-consumption cleaning of photovoltaic modules, reducing the operation and maintenance costs of photovoltaic power plants.

The application relates to the technical field of biological wave resonance, and provides a deviation analysis method and system based on biological wave resonance, so as to solve the problems of low precision and poor anti-interference capability of biological wave resonance abnormality detection in the prior art. The method comprises the following steps: collecting electrocardiosignal, electroencephalogram signal and micro-deformation data on the surface of a living body, and jointly aligning the signal data in a time-frequency domain; dynamically suppressing interference frequency bands of the electrocardiosignal and the electroencephalogram signal after joint alignment respectively; fusing the electrocardiosignal, the electroencephalogram signal after suppression and the micro-deformation data after joint alignment, to generate a fusion result; determining a deviation feature of the fusion result relative to a preset reference state by using convolution operation; and generating a biological wave resonance deviation analysis report of whether the biological wave resonance is abnormal according to the continuous length and the spatial distribution range of the deviation feature in a time domain dimension. The application improves the precision and the anti-interference capability of biological wave resonance abnormality detection.

The invention provides an aviation high-speed thin radial plate straight gear composite traveling wave resonance experiment and analysis method, and relates to the technical field of aviation gear vibration noise. The method comprises the following steps: firstly, carrying out an aero-engine accessory casing booster pump gear shaft bull gear traveling wave resonance characteristic experiment; then, based on an aero-engine accessory casing booster pump gear shaft bull gear traveling wave resonance characteristic experiment, the rotating speed of the engine is adjusted according to the slow sweeping process, and the traveling wave resonance characteristic of the accessory casing booster pump gear shaft bull gear is tested based on noise and stress parameters; determining composite traveling wave resonance and frequency of a bull gear of a gear shaft of the booster pump of the accessory casing at a specific engine rotating speed; the composite traveling wave resonance is the superposition of two different pitch diameter type traveling wave resonances of the gear shaft bull gear of the booster pump of the accessory casing at a specific engine rotating speed. According to the method, the dynamic response characteristic and the stress distribution rule of the traveling wave resonance characteristic of the thin radial plate straight gear under different resonance working conditions are disclosed.

The invention relates to a wide-spectrum response-enhanced quantum well infrared detector. Through collaborative design of an electron energy band structure and a medium photon structure of a quantum well, infrared detection bandwidth as high as 8 microns and response enhancement are realized. The multi-period GaAs / AlGaAs quantum well structure provided by the invention has a plurality of excited state electron energy levels for sub-band transition so as to realize wide-spectrum absorption. Selective etching is carried out downwards from the upper electrode layer to the lower electrode layer through an etching process, a quantum well layer is included in the middle, and the sub-wavelength optical micro-column array arranged periodically is formed. The high refractive index characteristic of the quantum well material and the air medium form a strong light field constraint effect, and the excited multiple guided wave resonance mode can realize wide spectrum coverage and response enhancement of a target spectrum band. The quantum well infrared detector can be compatible with a multi-period quantum well structure, and the small etching depth can be compatible with the technology of a focal plane.

A sound wave resonator defines a resonance preferred area, the resonance preferred area comprises a substrate, a buffer film, a reflection structure, a lower electrode, a crystal film and an upper electrode which are stacked with one another, the buffer film comprises a flat area overlapped on the resonance preferred area, and the roughness of the surface of the flat area is lower than 5nm.

The present invention provides a functional device, multifunctional clothing, membrane structure, and wearable device. The functional device comprises a flexible printed circuit board (FPCB); a functional chip disposed on the FPCB, comprising a flexible receiving coil for collecting ambient electromagnetic waves surrounding the functional device; and a resonance chip connected to the flexible receiving coil for converting the ambient electromagnetic waves into resonance waves. The resonance waves not only dilate blood vessels, promote blood flow, increase blood volume, and activate systemic immunoglobulins, but also emit resonance waves without the need for an external power source, making them easy to carry and use. Furthermore, the device is washable and rub-resistant, meeting the diverse application requirements of the functional device.

Embodiments of the present application provide a three-mode patch antenna and an electronic device, the three-mode patch antenna comprising: a reference ground; a patch, the patch comprising a first side and a corner opposite to the first side, the first side being electrically connected to the reference ground, the patch being provided with a feed point, the feed point being close to the corner, the feed point being used for feeding an excitation signal; wherein the patch generates a first resonance, a second resonance and a third resonance when transmitting the excitation signal, the first resonance is a quarter-wavelength resonance, the second resonance is a half-wave resonance, and the third resonance comprises a ring resonance and a three-quarter-wavelength resonance. The three-mode patch antenna provided by the embodiments of the present application can realize three-mode operation by designing the position of the feed point, so that the feed point is close to the corner, thereby expanding the antenna bandwidth and improving the communication performance.

The utility model belongs to the technical field of building curtain walls, and particularly relates to a building sound insulation curtain wall structure which comprises a supporting frame, the right end of the supporting frame is fixedly connected with a decoration panel, the inner wall of the supporting frame is fixedly connected with a first sound absorption layer, the first sound absorption layer makes contact with the decoration panel, the inner wall of the supporting frame is fixedly connected with a second sound absorption layer, and the second sound absorption layer makes contact with the decoration panel. The second sound absorption layer makes contact with the first sound absorption layer, the inner wall of the supporting frame is fixedly connected with a noise reduction layer, the noise reduction layer makes contact with the second sound absorption layer, the outer side of the noise reduction layer is fixedly sleeved with a blocking layer, and the blocking layer is fixedly connected with the supporting frame. Through the arrangement of the first sound absorption layer and the second sound absorption layer, sound wave resonance can be destroyed, broadband noise can be absorbed, under the action of the noise reduction layer, structural vibration sound transmission is restrained, under the action of the blocking layer, the good sound insulation sealing characteristic can be formed, transmission of remaining sound waves can be blocked, and therefore the good sound insulation effect of the building curtain wall can be guaranteed.