207 results about "Resonance effect" patented technology

A system for millimeter RADAR object recognition and classification using sub-band frequency interference and resonance effects from primary targets signals and reflected signals from secondary target preferably in the form of Wideband Chaos Generating Material (WCGM) objects, preferably detecting frequency dependent absorbing material, frequency dependent resonance effects from the second and primary target objects, frequency signal resonance effects caused by water molecule dipole effects in different sugar solutions, impedance of material, shape of metamaterial, and interference effects due to combination of signal sources resulting in a wider range of transmitter and scanning frequency band for RADAR based interrogation of target objects. The RADAR system makes opportunistic use of traditionally seen problematic interference signals, as extra signal sources providing extended range and frequency bandwidth for frequency-based interrogation of target object signatures in a frequency-intensity plane, a frequency-polarization plane, and a frequency-phase shift plane for doppler effects.

The invention discloses a spiral resonance photoacoustic cell and an operation method, the spiral resonance photoacoustic cell comprises a gas chamber straight tube, a spiral tube, an optical fiber collimator and an optical fiber F-P sonic sensor, the two ends of the gas chamber straight tube are open, the two ends of the spiral tube are communicated with the gas chamber straight tube, an acoustic resonance point is formed at the center of the spiral tube, and the optical fiber F-P sonic sensor is arranged in the central area of the spiral tube; and the optical fiber collimator is arranged at one end of the air chamber straight pipe. The spiral pipe is wound outside the air chamber straight pipe, the spiral pipe is communicated with the air chamber straight pipe, the structural design of the spiral pipe enables the spiral pipe to form acoustic resonance at a specific frequency, and the optical fiber F-P sonic sensor obtains a photoacoustic signal; compared with a conventional resonance photoacoustic cell, the physical volume of the resonance photoacoustic cell is greatly compressed, and the system integration level is effectively improved. More importantly, under the condition that a compact appearance similar to that of a non-resonant photoacoustic cell is kept, the device amplifies the photoacoustic signal intensity by several times through an acoustic resonance effect, and the detection sensitivity and the signal-to-noise ratio of the system are remarkably improved.

The invention discloses a surface plasmon resonance imaging system for expanding a dynamic range through a multi-mode optical path, and relates to the technical field of microscopic imaging, a laser outputs a monochromatic and linearly polarized continuous wave beam, a first dynamic beam deflection device performs dynamic angle deflection adjustment on the continuous wave beam, a prism is used for providing a total reflection interface, and a second dynamic beam deflection device is used for performing dynamic angle deflection adjustment on the continuous wave beam. Exciting an evanescent wave; a surface plasma resonance effect is generated through interaction of the SPR detection chip and evanescent waves, and sample characteristics are detected; the flow cell provides a sample flow channel, so that a sample is in full contact with the surface of the SPR detection chip; the second dynamic light beam deflection device cooperatively adjusts the propagation direction of reflected light on the surface of the SPR detection chip, and the imaging detection device captures a high-spatial-resolution SPR image formed by the reflected light and transmits the image to the upper computer in real time for processing and analysis. According to the invention, the change of the resonance angle can be tracked in real time, and high-sensitivity and high-resolution monitoring of the dynamic process of biomolecule interaction is realized.

The invention discloses a focusing type acoustic streaming heat dissipation device facing a chip. The device belongs to the crossing field of ultrasonic technology and heat dissipation technology and is composed of a piezoelectric stack, an acoustic lens, a splitter plate, a base, a supporting rod, a copper electrode and the like. According to the device, geometric parameter configuration of the splitter plate, the piezoelectric stack and the acoustic lens is optimized, and a double-piezoelectric-plate stacked structure is adopted to enhance the ultrasonic resonance effect; high-frequency alternating voltage is applied to the copper electrodes at the two ends of the piezoelectric stack, high-frequency sound waves are excited through the inverse piezoelectric effect, and after the sound waves are focused through the sound lens, a gradient sound pressure field is formed in a cavity formed by the splitter plate and the piezoelectric stack; air molecules are driven to move directionally based on the acoustic streaming effect, so that air flow at an air inlet is accelerated by sound pressure to form high-flow-rate focusing jet flow at an air outlet, and targeted forced convection heat dissipation of a chip heat source is realized. According to the device, the ultrasonic technology and the heat dissipation technology are combined, the whole device is simple in structure, free of moving parts and low in noise, and various heat dissipation requirements can be met in an array mode.

The invention discloses an acoustic black hole structure and a vibration damping device.The acoustic black hole structure comprises an acoustic black hole body and a damping layer, the acoustic black hole body is provided with a uniform thickness area and an acoustic black hole area, the acoustic black hole area is provided with a plurality of grooves, the grooves are distributed from the first end to the second end of the acoustic black hole area, and the damping layer is arranged between the first end and the second end of the acoustic black hole area. The depths of the grooves are gradually increased in the direction from the first end to the second end, and the damping layer is arranged in the acoustic black hole area. By machining the groove in the acoustic black hole area, the local bending rigidity of the acoustic black hole body is changed, the bending wave speed of the acoustic black hole body is reduced, the acoustic black hole effect is achieved, due to the arrangement of the groove, the local resonance effect can be utilized, and then structural vibration suppression in the low-frequency range is achieved; the problem that a traditional acoustic black hole structure is poor in low-frequency-band vibration reduction effect is solved, in addition, thickness cutting of an acoustic black hole area of an original structure is avoided, and the manufacturing difficulty and the requirement for the precision of machining equipment are lowered.

The invention relates to the technical field of resonant pouring castings, in particular to a method for improving the homogeneity of castings in all directions based on resonant pouring, which comprises the following steps: preparing a mold / casting mold, setting resonant parameters, pouring molten metal, maintaining resonance and solidifying, and detecting the homogeneity. Through the resonance effect, molten metal mold filling is uniform, the size qualification rate is increased, meanwhile, grain refinement can be promoted, the isotropic performance uniformity and stability of a casting are remarkably improved, the internal defect rate is greatly reduced, the comprehensive yield is increased, and energy consumption and cost are reduced.

The invention relates to the technical field of diaphragm pump aging test, and discloses a two-parameter intelligent closed-loop diaphragm pump aging test system and method. According to the method, a temperature spectrum and a vibration spectrum are obtained through fast Fourier transform, a frequency domain coherence coefficient is calculated to identify temperature-vibration coupling characteristics, a resonance frequency band and a drift trend thereof are identified in real time by adopting a spectrum peak tracking algorithm, and a multi-objective optimization function considering aging acceleration efficiency and resonance risk is constructed. And solving the optimal temperature stress amplitude and vibration stress frequency by using a particle swarm algorithm, generating a stress loading instruction avoiding a resonance area through a self-adaptive PID controller, and dynamically updating model parameters based on a closed-loop feedback mechanism. According to the invention, the problem of resonance effect amplification caused by traditional fixed frequency stress loading is solved, and refined adaptive stress control is realized.

The invention belongs to the technical field of SERS (Surface Enhanced Raman Scattering) detection, and relates to a preparation method of an Ag-Fe3O4 composite SERS substrate and application of the Ag-Fe3O4 composite SERS substrate in monitoring trace pollutants in water. Based on a plasma-semiconductor synergistic enhancement mechanism, cubic Fe3O4 nano particles with exposed {100} crystal faces are synthesized through a hydrothermal method, and the cubic Fe3O4 nano particles and Ag nano particles are subjected to ultrasonic-stirring to construct the Schottky heterojunction. The substrate creatively realizes dual-channel enhancement: the local surface plasmon resonance effect of Ag nanoparticles generates electromagnetic enhancement, the narrow band gap of Fe3O4 promotes photo-induced electrons to be transferred to Ag, an interface electric field is formed, and the polarizability of adsorption molecules is remarkably increased. When the probe is applied to detection of trace pollutants in a water body, the probe molecule RB is anchored on the surface of Fe3O4 through carboxyl, and the HOMO energy level of the probe molecule RB and the valence band top of Fe3O4 generate resonance charge transfer, so that the Raman cross section is improved. The detection limit of RB under 0.25 mW laser is increased by several orders of magnitude compared with that of a single Ag substrate.

The invention discloses a double-cantilever-beam piezoelectric vibration energy collector based on an annular steady state, which comprises a piezoelectric transducer, an elastic cantilever beam, a magnet and a base, after the piezoelectric transducer is mounted on the elastic cantilever beam to form a double-layer composite cantilever beam, the magnet is mounted at the free end of the double-layer composite cantilever beam, nonlinear coupling is carried out through repulsive magnetic force, and the piezoelectric transducer is connected with the base. The two-dimensional annular potential well structure with the adjustable potential well is formed, and the energy collector can easily trigger large-amplitude inter-well movement through the potential well structure. Through the nonlinear coupling induced internal resonance effect, inter-well energy transfer and two-dimensional potential well modulation are realized, and vibration energy can be efficiently captured in a broadband without a large amount of energy input or a complex structure. According to the design, the collection efficiency of low-frequency, low-intensity and multi-direction environment vibration energy in a wide working bandwidth is good.

The invention relates to the technical field of hyperbaric oxygen physiotherapy cabins, in particular to a terahertz wave micro hyperbaric oxygen physiotherapy cabin which comprises a cabin body, a door opening is formed in one face of the cabin body, a cabin top is installed at the top of the cabin body, and a door plate is hinged to the interior of the door opening through a hinge; the deep sea volcanic energy stone treatment device comprises a cabin, two groups of bed bodies are arranged in the cabin, the two groups of bed bodies are symmetrically mounted in the cabin, each bed body is of a hollow structure, and a plurality of terahertz wave generation modules are uniformly laid on the upper surface of each bed body through a support. The pelelith-based passive terahertz releaser formed after the pelelith-based passive terahertz releaser is combined with the ceramic matrix can continuously release terahertz waves with the frequency band of 0.1-12 THz, the vibration frequency is consistent with that of human cells, and the terahertz waves with the frequency band can repair biological enzyme and nucleic acid structure deformation caused by free radical attack and age increase through the biological resonance effect, so that the pelelith-based passive terahertz releaser can be used for repairing biological enzyme and nucleic acid structure deformation caused by free radical attack and age increase. The metabolic function is recovered from the cell molecule level, and the defect that a traditional oxygen cabin can only supply oxygen on the surface layer and cannot be deeply repaired is overcome.

The invention discloses a feedback control system of an ultrasonic flaw detector, and relates to the technical field of ultrasonic nondestructive detection.The system comprises a double-frequency transmitting module, a dynamic power control module, a signal acquisition module, a signal processing module and a feedback control module.The control system of the ultrasonic flaw detector adopts a double-frequency differential resonance detection method; two kinds of ultrasonic waves with specific frequency difference are emitted, the resonance effect at the defect is utilized to enhance echo signal characteristics, a double-frequency difference algorithm is matched, frequency deviation and amplitude change information of the defect can be accurately extracted, different types of defects can be effectively distinguished, and meanwhile, a dynamic power control mechanism can be used for controlling the detection accuracy according to the thickness, the structure and the material parameters of a detected object. The transmitting power of the double-frequency ultrasonic waves is adjusted in real time, it is ensured that the ultrasonic waves can reach the defect position in the optimal energy state under different working conditions, the resonance effect is enhanced, and therefore the system can achieve high-precision detection on tiny defects.

The invention provides a tunnel micro-seismic blasting targeted protection control method and device, and relates to the technical field of tunnel blasting, and the method comprises the steps: obtaining the distance between a protected building and a tunnel, and building a blasting vibration wave propagation model based on the distance and an initial attenuation coefficient; calculating predicted vibration data of seismic waves generated by each blasting section in a preset blasting scheme, wherein the seismic waves are transmitted to the protected building; taking the minimum theoretical peak vibration velocity of the protected building as a target, and calculating by adopting a numerical optimization algorithm to obtain a non-equal-difference detonation delay sequence of each blasting section; when the detonating time interval of the adjacent detonating sections is not equal to the integral multiple of the inherent main earthquake period, detonating is carried out according to the non-equal-difference detonating delay sequence; and comparing the actually measured vibration data with the predicted vibration data, and adjusting the attenuation coefficient based on the comparison result, thereby effectively preventing the resonance effect, preventing the vibration energy from being amplified, and ensuring the construction safety.

The embodiment of the invention relates to the technical field of devices for preventing or reducing noise, in particular to a rubber cell element structure and a vibration reduction and sound insulation assembly. According to the rubber cell element structure provided by the invention, due to the fact that the resonant frequencies of the cell element rings with different sizes are different, each first cell element ring is arranged in each second cell element ring, and the first cell element rings and the second cell element rings are concentrically arranged, so that vibration and noise reduction of noise with different frequencies are realized; a plurality of first cell element rings and a plurality of second cell element rings are arranged on a substrate, the substrate is supported by the cell element rings, the second cell element rings are arranged adjacent to one another, the cell element rings are arranged in a limited space as many as possible, and therefore the supporting performance of the substrate is improved; the first cell element ring and the second cell element ring are arranged to be of a structure capable of generating the local resonance effect to form the band gap, so that transmission of vibration noise in the structure is restrained, the restraining capacity of the structure for multi-band noise is improved, and the treatment requirement for different-frequency noise is comprehensively met.

This invention discloses a composite hollow anti-resonant optical fiber, comprising an outer cladding layer, a doped layer, and an anti-resonant layer arranged sequentially from the outside to the inside. The anti-resonant layer includes multiple glass nested tubes evenly distributed circumferentially and tangent to the doped layer, with gaps between them. These glass nested tubes surround and form an air core. Each glass nested tube includes a circular outer nested tube and an elliptical inner nested tube located within the outer nested tube. The minor axis of the inner nested tube is arranged radially along the optical fiber, and the outer circle of the inner nested tube, away from the air core, is tangent to the inner circle of the outer nested tube, also away from the air core. This invention employs a multi-layer nested structure, optimizing the anti-resonance effect through the combination of the doped layer and the specially structured anti-resonant layer.

The application belongs to the technical field of kitchen appliances, and particularly relates to a control method and device of an extractor hood and electronic equipment. The first offset displacement and the first vibration acceleration of a motor of the extractor hood are acquired, the vibration level of the motor is determined according to the first offset displacement and the first vibration acceleration, and the rotating speed of the motor of the extractor hood is adjusted according to the vibration level. The rotating speed of the motor is actively reduced, noise is avoided, vibration is inhibited, the abrasion and resonance effect of mechanical components are reduced, and the risk of structure loosening or part falling of the extractor hood caused by vibration is reduced.

This document discloses a medical system including a memory (110) storing machine-executable instructions (120) and a trained neural network (122). The trained neural network is configured to output rectified magnetic resonance image data (130) in response to receiving a set of magnetic resonance images (126) as input, each of the magnetic resonance images in the set having a different spatially constant frequency deviation resonance factor. The medical system also includes a computing system (106) configured to control the medical system, wherein the execution of the machine-executable instructions causes the computing system to: receive (200) k-space data (124) acquired according to a magnetic resonance imaging protocol; reconstruct (202) a set of magnetic resonance images (126) according to the magnetic resonance imaging protocol, wherein each of the magnetic resonance images in the set of magnetic resonance images is reconstructed assuming different spatially constant frequency deviation resonance factors selected from a list of frequency deviation resonance factors (128); and receive (204) rectified magnetic resonance image data in response to inputting the set of magnetic resonance images into the trained neural network.

The present invention relates to the technical field of pipeline vibration control, disclosing a metamaterial pipeline vibration absorber structure with an adjustable bandgap. The structure comprises: a main oscillator module, mounted on the outer wall of a metamaterial pipeline substrate, which generates a local resonant bandgap based on the metamaterial's local resonance effect, suppressing the transmission of elastic waves within the pipeline and effectively controlling low-frequency vibrations; an additional oscillator module, adjustable and slidably arranged on the main oscillator module along the axial direction of the metamaterial pipeline substrate, to achieve adjustable and precise control of the metamaterial pipeline vibration suppression frequency band. The main oscillator module and the additional oscillator module work together to achieve low-frequency vibration suppression in the metamaterial pipeline. The resonant frequency of the additional oscillator is mechanically adjusted by sliding, dynamically expanding the bandgap range, resolving the contradiction between the fixed frequency band of traditional vibration absorbers and the complex and variable pipeline vibration.

The present invention refers to a type of reactor for initiating and carrying out a nuclear fusion reaction, use of plasmonic material in initiating a nuclear fusion reaction, and a method for initiating a nuclear fusion reaction. By using a plasmonic material to affect resonance effect, preferably plasmonic enhancement effect, a Coulomb explosion can be triggered, and in turn a nuclear fusion reaction can be initiated.

The utility model discloses a parallel resonance type suction silencer for a refrigerator compressor, which comprises a shell, the shell comprises an upper cavity cover and a lower cavity seat, a cavity partition plate is connected between the upper cavity cover and the lower cavity seat, an inner cavity of the shell is divided into an upper cavity and a lower cavity through the cavity partition plate, the top of the upper cavity cover is connected with an exhaust pipe, and the top of the lower cavity is connected with an exhaust pipe. One side of the lower cavity seat is connected with an air suction pipe, the cavity partition plate is connected with a communicating pipe assembly communicating the upper cavity with the lower cavity, the communicating pipe assembly comprises a plurality of communicating pipes connected in parallel, each communicating pipe is provided with a plurality of resonant cavity slits, and the resonant cavity slits in the communicating pipes are partitioned in different independent spaces through a plurality of partition plates. The design of the communicating pipes connected in parallel is adopted, holes are formed in the pipe walls, and meanwhile the partition plates are added to divide the space; according to the design, the air suction efficiency of the silencer can be improved, and the characteristic noise reduction capacity in a wide frequency band can be improved through the resonance effect of the Helmholtz cavity; and the flow channels among different cavity spaces have the noise reduction effect of the expansion cavity.

The present invention relates to a compound of the general formula, belonging to the technical field of organic electroluminescence, and particularly to a multi-resonance organic compound. The compound has a structure of the following formula: #imgabs0# The electroluminescence spectrum of an OLED device prepared using the compound of the present invention has a narrow half-maximum width, showing a significant multi-resonance effect. The device also has the advantages of low starting voltage, high luminous efficiency and long life, showing good application prospects.

A cement scale removing system based on the resonance effect comprises a composite vibration generating device, a vibration feedback control system and an adjustable fixing device, the composite vibration generating device is composed of a pneumatic vibration device and an ultrasonic vibration device, and the pneumatic vibration device and the ultrasonic vibration device are alternately installed on the adjustable fixing device; the device has the following beneficial effects that broadband vibration is generated through the composite vibration device, namely in a pneumatic-ultrasonic composite vibration mode, when the vibration frequency is matched with the inherent frequency of a scaling layer, the resonance effect is generated, the energy transmission efficiency is greatly improved, internal cracks of scaling are expanded, efficient descaling is achieved, the device can adapt to structures of different thicknesses, and the device is suitable for large-scale popularization and application. The long-standing problem of contradiction between descaling efficiency and energy consumption in the prior art is solved.

The utility model discloses a noise reduction box and a traction machine, which belong to the technical field of traction machines, the noise reduction box comprises a first plate, a second plate and four third plates, the first ends of the four third plates are all installed on the first plate, the second ends of the four third plates are all installed on the second plate, the first plate and the second plate are arranged oppositely, and the first plate and the second plate are arranged oppositely. A cavity is formed among the inner sides of the first plate, the second plate and the four third plates; the first plate or the second plate is provided with a plurality of first ribs and second ribs, the first ribs extend in the width direction of the first plate or the second plate, and the second ribs extend in the length direction of the first plate or the second plate; the first ribs and the second ribs are distributed in a criss-cross mode, and a plurality of silencing areas are formed. The multiple silencing areas are used for conducting isolation and differentiation treatment on sound waves of the noise reduction box, the sound waves of the noise reduction box are prevented from being overlapped, the multiple silencing areas can prevent the sound waves from generating a resonance effect, and therefore 5%-15% of noise of a noise source can be reduced.

The present invention discloses a method and system for visualizing building curtain wall monitoring data processing. The method uses an extreme learning machine algorithm to monitor the health of the curtain wall. By assigning dynamic weights to sensors at different locations, the significance of signals in vulnerable areas is enhanced, and the signal's responsiveness to local damage is improved. By simulating the pheromone attenuation effect, the weight and bias of each node are dynamically adjusted, thereby enhancing the model's adaptability to complex, high-dimensional data, improving noise robustness, and reducing the impact of redundant features in the data. Based on the resonance effect, the hidden layer's adaptability to nonlinear data is enhanced. By dynamically adjusting the regularization coefficient, the stability of the classification is improved. Based on the structural damage propagation consistency constraint term, the sensitivity to early local damage is enhanced, and the system's fault detection capability is improved.

The invention discloses a continuous three-mass resonance mixing method, a device and a mixing system, which apply resonance mechanical energy to materials, enable the materials to perform mixing motion under the action of the resonance mechanical energy, simultaneously form ellipse-like mixed material flows macroscopically and microcosmically, realize shearing, diffusion and convection actions among the materials and improve the mixing effect of the materials. And the materials are uniformly mixed on the macroscopic and microcosmic mixing levels. According to the invention, uniform mixing can be realized on macroscopic and microscopic mixing levels, the mixing efficiency is high, and the uniformity is good; the continuous three-mass resonance mixing device is low in structure and investment cost, the vibration mechanism is matched with the concave plates and the convex plates which are alternately arranged in the mixing cavity, energy gradient generated in the mechanical vibration process can be provided to form sound waves, then the sound resonance effect is formed, efficient mixing of materials is achieved, and the continuous three-mass resonance mixing device has good popularization prospects.

The application discloses a sound-absorbing metamaterial unit and device based on a coupling resonance structure and a broadband impedance modulation body. The sound-absorbing metamaterial unit comprises the coupling resonance structure and the broadband impedance modulation body. A top plate with holes and a surrounding wall and a bottom plate form the coupling resonance structure with a low-frequency resonance effect. Meanwhile, the broadband impedance modulation body in an acoustic waveguide cavity can adjust the characteristic impedance in a wide range. Due to the synergistic effect of the coupling resonance structure and the broadband impedance modulation body, impedance matching can be achieved in a low-frequency broadband range. The sound-absorbing metamaterial unit provided by the application can have good sound-absorbing effect in a low-frequency broadband range, and has the advantages of simple processing and manufacturing, low cost and high reliability. The sound-absorbing metamaterial unit overcomes the defects of a narrow sound-absorbing frequency band, a complex topological configuration and poor reliability of a traditional acoustic metamaterial sound-absorbing structure.

The utility model provides a hub type reinforced brake which is characterized in that a conical anti-resonance groove and a reinforcing rib groove are formed in a reinforcing plate, the conical anti-resonance groove can effectively avoid the water accumulation problem, meanwhile, the anti-resonance effect is enhanced, and the problems of resonance and abnormal sound during braking are solved. In addition, the strength of the reinforcing plate is improved through the design of the reinforcing rib grooves, the material thickness can be reduced to 1.2 cm, the weight is reduced, and the cost is reduced. The brake further comprises an installation structure of the positioning shaft and the cam shaft, and the connection strength is enhanced through cooperation of the first riveting edge, the second riveting edge and the limiting flange circular ring. A third limiting flange circular ring is arranged on the cam shaft, so that deviation or falling is prevented. A U-shaped clamping body is arranged on the outer surface of the brake cover, external parts are convenient to install and connect, and meanwhile the structural strength is enhanced.

The invention belongs to the field of field conductance meters, and provides a variable-frequency multipurpose biological resonance field conductance meter which comprises a field conductance meter body, a power adapter and an activation water cup, the activation water cup comprises a cup body, a water outlet nozzle is arranged on the side face of the top of the cup body, a cup cover is arranged on the top of the cup body, and a cup handle is arranged on the side face of the cup body; a water circulation assembly is installed on the cup body, the two ends of the water circulation assembly are both communicated with the interior of the cup body, and the water circulation assembly is used for pumping water at the bottom of the cup body to the top of the cup body. According to the water cup, the water circulation assembly is arranged and can pump water at the bottom of the cup body to the top of the cup body, so that the water circularly flows up and down, the water at each position can be subjected to the resonance effect of a magnetic field with the same intensity, and the use effect of the product is improved.

The utility model relates to the technical field of milling cutters, and discloses a blade disc milling cutter which comprises a cutter handle and a cutter head, one end of the cutter head is connected with the cutter handle, four cutting edges are arranged at the other end of the cutter head in the circumferential direction of the cutter head, the four cutting edges are oppositely arranged in pairs, the two opposite cutting edges are the same, and the two adjacent cutting edges are different. A main chip groove with a helical angle is formed between every two adjacent cutting edges at the other end of the tool bit along the direction close to the tool handle; in actual use, the two pairs of cutting edges which are opposite in pairs are arranged at the other end of the cutter head, the opposite cutting edges are the same, and the adjacent cutting edges are different, so that the anti-vibration milling cutter can play a good anti-vibration effect in actual machining, the cutting resonance effect can be further inhibited, the service life of the milling cutter is prolonged, and the service life of the milling cutter is prolonged. Therefore, three blades can be machined under the condition of high linear speed, and the requirements for machining efficiency and service life are met.

The application relates to the technical field of motion regulation and driving, in particular to a reciprocating motion amplification device and method of a flexible structure of a swing bridge. The reciprocating motion amplification device comprises a loading unit, an excitation execution unit, a self-adaptive identification unit and an energy supply unit. The excitation execution unit and the self-adaptive identification unit are both installed in the loading unit. The self-adaptive identification unit collects vibration response signals of the flexible target structure in real time and identifies the real-time natural frequency, controls the excitation execution unit to adjust the excitation frequency, so that the excitation frequency is automatically matched with the real-time natural frequency, resonance effect is excited, and reciprocating motion amplification is realized. Through closed-loop self-adaptive control, frequency drift is automatically tracked without manual intervention, excitation power consumption is reduced while the significant amplification effect is maintained, and the system adaptability and intelligent level are improved.

The invention belongs to the technical field of energetic material preparation, and particularly relates to a method for preparing nano explosive particles based on an acoustic resonance assisted ball milling technology. Comprising the following steps: weighing and measuring acoustic resonance materials; refining explosive particles through acoustic resonance high-frequency vibration; filtering and drying the nano explosive particles; acoustic resonance high-frequency vibration is applied to the refining process of explosive particles, zirconium oxide beads in a ball milling tank collide at a fixed same frequency under the action of same-frequency resonance, so that an efficient and stable working space is formed in a limited space of the ball milling tank, the explosive particles flow among the zirconium oxide beads through ball milling liquid, and the explosive particles are refined. And under the impact and resonance effects of the zirconium oxide beads, the explosive particles are crushed and refined, and finally the nano explosive particles are prepared. According to the invention, the acoustic resonance frequency is highly matched with the characteristics of the zirconia beads, so that a better synergistic effect can be generated, and the nanocrystallization degree of explosive particles is improved; in addition, the application range of the acoustic resonance technology is expanded through the refinement principle.