37 results about "Harmonic vibration" patented technology

The invention relates to the technical field of maglev motor dynamics and control, and discloses a bearingless asynchronous motor multi-frequency harmonic vibration cooperative suppression method, which comprises the following steps: acquiring radial displacement signals and mechanical angular velocity of a rotor in an x axis and a y axis under a stator fixed coordinate system, and stacking double-axis displacement signals into an observation vector; calculating a weighting coefficient of the normalized residual error through a Huber robust cost function, and outputting the amplitude, the phase and the confidence of each order of harmonic wave; estimating the total disturbance of the system by using a linear extended state observer with harmonic energy injection, wherein the total disturbance is obtained by weighted summation according to the confidence, order and mechanical angular velocity of each order of harmonic; calculating a feedback control force according to the total disturbance estimated value, and superposing the feedforward compensation force and the feedback control force to generate a total suspension force instruction; and according to the total suspension force instruction, inversely calculating a suspension winding current reference value and outputting a control instruction. According to the invention, a mutually complementary cooperative suppression mechanism is formed, and the suppression precision of multi-frequency vibration is improved.

The invention relates to the technical field of unmanned aerial vehicle nondestructive testing, and discloses an unmanned aerial vehicle precision part rapid detection system based on multi-sensor fusion. Low-frequency harmonic vibration excitation is applied through a micro vibration excitation module, and a phase offset auxiliary harmonic signal is generated in combination with a multi-harmonic phase synchronous modulation module; and the defect response of the precision part is amplified. The multi-sensor array synchronously collects vibration, optical and thermal response data, and data calibration is carried out through the sensor array self-calibration network. And the defect pattern library pre-matching engine matches the current detection data with the historical defect pattern. And the fusion processing unit performs weighted fusion on the multi-modal detection data, adjusts detection parameters according to a detection result through a closed-loop feedback loop, and triggers iterative detection. According to the invention, low-frequency harmonic vibration excitation is applied through the micro vibration excitation module, and the multi-harmonic phase synchronous modulation module is combined to superpose auxiliary harmonic signals of phase deviation, so that the identification capability of micro defects is improved.

The application discloses a centrifugal fan impeller, a centrifugal fan and a bionic winglet design method, which comprises an impeller body and a blade end winglet, a plurality of blade end winglets are fixedly arranged at one end of the impeller body and are arranged into a circular ring along the circumference of the impeller body; the blade end winglets are gradually increased or decreased along the axial length of the impeller body in sequence along the circumference of the impeller body to form a wave-shaped structure; on the one hand, the bionic wave-shaped distributed blade end winglet structure can straighten the airflow, inhibit the generation and development of vortexes and further reduce vortex noise; on the other hand, the blade end winglet structure with different length distribution characteristics can break the periodic frequency characteristics of the noise source, inhibit the noise peak and effectively inhibit harmonic vibration noise; on the third hand, the blade end winglet can further work on the low-speed and low-pressure airflow, inhibit the gas backflow leakage and the airflow hindering effect at the inlet, and further increase the outlet air pressure and air volume of the fan.

This invention relates to the field of aerospace control technology, and particularly to a method for canceling micro-vibrations of a magnetically levitated CMG group based on rotor imbalance adjustment. The method includes: establishing models of the unbalanced forces and torques of each magnetically levitated rotor; establishing a dynamic synthesis model of the CMG group; establishing the celestial attitude dynamics equations based on the dynamic synthesis model and Euler equations; establishing a CMG group control model; constructing an objective function using the CMG group control model and the celestial attitude dynamics equations; establishing a current control model between the power and current of the rotor's radial translation and radial rotation; establishing the dynamic rotation equations of the high-speed rotor's radial translation and radial rotation; and determining the output current based on the dynamic rotation equations and the control model to adjust the rotor's imbalance and phase, thereby canceling the harmonic vibrations of the magnetically levitated CMG rotor.

A tip-enhanced spectroscopy may include a substrate on which liquid containing an analyte is to be positioned, a tip extending from a fixed end to a free end adjacent to a location for the analyte, and a vibration source configured to harmonically vibrate the tip based on a preset natural frequency. The preset natural frequency may be a natural frequency of a tuning fork.

The utility model relates to the technical field of hot water equipment, and discloses hot water equipment with a water pump connecting pipeline vibration isolation structure, which comprises a water inlet pipe joint, a water pump water inlet pipe, an equipment shell and a driving side anti-vibration pad, the driving side anti-vibration pad is clamped between the water inlet end of the water pump water inlet pipe and the equipment shell; the water inlet pipe connector is located on the outer side of the equipment shell and is in sealed connection with the water inlet end of the water pump water inlet pipe. The active side anti-vibration pad is arranged between the water pump water inlet pipe and the inner side wall of the equipment shell and used for dissipating the vibration quantity on the reverse flow path of the water pump water inlet pipe and the equipment shell and weakening the single-frequency noise peak value of water; and meanwhile, the resonance problem caused by the fact that vibration of the water pump in circulation operation is transferred to the equipment shell through the water pump water inlet pipe is effectively eliminated, compound noise generated by harmonic vibration is avoided, and the smoothness of the gas water heater during working and the comfort of a user are improved.

This invention discloses a semi-analytical method and system for calculating the stiffness and damping coefficients of foil gas dynamic bearings, relating to the field of air conditioning and clothing temperature control technology. It aims to address the shortcomings of traditional Reynolds equation methods in terms of accuracy and universality, as well as the low computational efficiency and mesh distortion issues of existing CFD methods. The method includes: constructing a fluid-structure interaction (FSI) computational model to calculate and obtain the static equilibrium position of the journal; applying an eccentricity perturbation at the static equilibrium position and performing an additional steady-state FSI calculation to obtain the four stiffness coefficients of the foil bearing using a first set of analytical formulas; applying small-amplitude simple harmonic vibrations along the x and y directions to the journal and performing two transient FSI calculations to obtain the four damping coefficients of the foil bearing using a second set of analytical formulas. This invention combines high accuracy and high computational efficiency, providing an efficient and reliable analytical tool for evaluating the dynamic characteristics of foil bearings and designing the stability of the rotor systems they support.

1. Name of the design product: unmanned aerial vehicle holder (self-adaptive harmonic vibration). 2. Use of the design product: used for assisting the flight and shooting of unmanned aerial vehicle. 3. Design points of the design product: in shape. 4. Picture or photo best indicating the design points: perspective view 1.

The invention relates to the technical field of vehicles, for example, relates to a prediction method and device for beat vibration of an automobile steering wheel and a computer readable storage medium. The prediction method comprises the steps that the upper limit target value X1 of steering wheel vibration caused by engine excitation is set to be equal to (A1, omega1), the upper limit target value X2 of steering wheel vibration caused by fan excitation is set to be equal to (A2, omega2), A is the vibration amplitude, and omega is the vibration angular frequency; taking the X1 and the X2 as two simple harmonic vibration inputs, carrying out waveform superposition in simulation software, and synthesizing into a predicted beat vibration time domain signal X (t); exporting the beat vibration time domain signal X (t) as a time domain driving file in a preset format at a set sampling frequency and duration; inputting the time domain driving file into a vibration exciter of a built steering system vibration excitation rack so as to drive a steering wheel to generate vibration; and performing beat vibration data analysis based on the vibration signal of the steering wheel to obtain a beat vibration prediction result. Before a sample vehicle is manufactured, the beat vibration problem is intervened in advance, and expensive rectification in the later real vehicle stage is avoided.

The application discloses a single-press trigger type manual power generation module, and relates to the field of power generation devices, which comprises a magnetic circuit assembly and a swing assembly arranged coaxially, wherein a permanent magnet on the swing assembly and the magnetic circuit assembly form a variable magnetic circuit, and a balance assembly is further arranged on the balance wheel; the balance assembly is used for accurately configuring the rotational inertia and the gravity center of the swing assembly, so that the balance wheel can perform simple harmonic vibration at a fixed frequency and a decay law after each pressing, and the stability of output electric energy is ensured; meanwhile, the balance assembly is used for balancing the gravity distribution on the balance wheel, so that the "equivalent gravity center" of the balance wheel coincides with the axis of the rotating shaft; when the balance wheel swings, the operating force and the reset element are only used for overcoming the friction between components, so that the operating force felt by the operator is basically unchanged in different spatial postures, and the operation feeling of the operator is improved. The application further discloses a self-powered device using the power generation module, and the self-powered device does not need any external power supply, and is maintenance-free and wireless.

This application discloses a method and device for determining an engine state. The method comprises obtaining a vibration signal from a cylinder to be inspected in the engine; processing the vibration signal to obtain a harmonic vibration amplitude; and determining that the engine state is a misfire fault state if the harmonic vibration amplitude is greater than a standard vibration amplitude. In this manner, the vibration signal from the cylinder to be inspected in the engine is processed to obtain a resonant vibration amplitude. The resonant vibration amplitude is then compared with the standard vibration amplitude to determine whether the engine is in a misfire fault state. This method can accurately identify an engine in a misfire fault state, improving the accuracy of identifying the engine's state and thereby effectively protecting the engine.

This invention discloses an active vibration control system and method for tiltrotor aircraft wings, comprising: an actuator assembly consisting of piezoelectric laminated actuators symmetrically arranged within the wing; acceleration sensors, including a wing acceleration sensor located at the outer end of the wing and a fuselage acceleration sensor located in the cockpit; and an adaptive control unit for acquiring sensor signals and outputting control commands. A dual-loop control and flight state tracking strategy is employed: the first control loop implements dynamic characteristic control for the wing-rotor system to suppress transient responses; the second control loop implements steady-state response control for the airframe structure to suppress steady-state harmonic vibrations at the rotor pass frequency and its integer multiples. The flight mode is determined based on the rotor speed and nacelle tilt angle, and the weights of the dual-loop control are dynamically adjusted. This invention achieves adaptive vibration suppression of the tiltrotor aircraft throughout its entire flight envelope, balancing transient and steady-state response control, improving flight quality and extending the lifespan of critical equipment.

A cleaning and caring appliance and a transducing apparatus thereof. A transducer includes a transducer frame and magnets attached to the transducer frame, an elastic assembly and a drive shaft, the elastic assembly includes a transmission arm and an elastic piece held by the transmission arm, and the transmission arm is fixedly connected to the drive shaft, the elastic piece has an outer edge and an inner edges, corresponding to a holding portion of the transmission arm, a recess is formed on the transmission arm, and a recess depth D of the recess is greater than a first fixed coupling width B1 from a bottom surface of the recess and a longitudinal axis. The solution avoids the suppression of a harmonic vibration rotation angle by damping during a harmonic motion, allowing a cleaning assembly such as a brush head to have a larger rotation angle and improving the mechanical efficiency.

The application discloses a kind of welded structure harmonic response structural stress fatigue life prediction method, comprising the following steps: step 1: build the finite element model of welded structure containing weld;Step 2: using unit external load to the finite element model of welded structure harmonic sweep frequency obtains node response displacement;Step 3: according to external load coefficient obtains the unit stiffness matrix and node displacement under external load, as follows: step 4: calculate the simple harmonic response structural stress and equivalent structural stress of structure.The welded structure harmonic response structural stress fatigue life prediction method of the application: (1) compared with traditional quasi-static method, can solve the problem that quasi-static method cannot be carried out vibration fatigue evaluation, (2) compared with frequency domain structural stress method, can solve the problem that frequency domain structural stress method cannot evaluate simple harmonic vibration fatigue, (3) compared with traditional transient structural stress method, the method of the application is more efficient, and the result error is very small.

The invention discloses a micro-vibration adjusting bionic gripper, and belongs to the field of bionic grippers. The device is composed of a main body structure, a tail end assembly structure and an adhesion structure. The tail end assembly structure is connected with the main body structure through the fixed shell; the main body structure comprises a lower shell, a gear motor, a lead screw, an upper shell, a fixing bolt, a bearing, a fixing shell and a connecting rod. And the gear motor is connected with the screw rod to provide reciprocating power, so that the screw rod can linearly move on the fixed guide rail. The tail end assembly structure comprises a connecting rod, a lower connecting rod, a first torsion spring, a second torsion spring, a bionic adhesion structure, a bearing structure and a simple harmonic vibration system. The tail end assembly structure converts the reciprocating linear motion of the lead screw into plane circular motion through mechanical conversion, and therefore the whole device is driven to carry out expected function operation. By introducing micro vibration, the bionic gripper can enhance the surface energy, and has the advantages of lossless gripping, high precision, high adaptability, convenience in operation and the like.

The invention discloses a helicopter rotor dynamic balance debugging method, which comprises the following steps of: setting that a rotor system has dynamic unbalance mass with equivalent mass of m0 on a circle with radius of R, and enabling a rotor bearing seat to generate radial harmonic vibration; the amplitude A0 and the phase alpha0 of the vibration signal of the bearing seat are obtained by measuring the vibration signal of the bearing seat and the rotating speed signal of the rotor and analyzing the measured data. A balance weight m1 is arranged at the balance weight position of any paddle; the amplitude A'and the phase alpha 'of the vibration signal of the bearing seat are obtained by measuring the vibration signal of the bearing seat and the rotating speed signal of the rotor and analyzing measurement data; determining an original dynamic unbalance mass m0 and an azimuth angle delta of the original dynamic unbalance mass according to the obtained A0, alpha0, A'and alpha '; and based on the determined original dynamic unbalance mass m0 and the azimuth angle delta, performing dynamic balancing of the rotor system. According to the invention, on-line debugging of the dynamic unbalance mass of the helicopter rotor in any azimuth angle can be realized without professional dynamic balance debugging equipment.

The invention belongs to the field of ultrasonic elliptical vibration assisted ultra-precision cutting machining, and discloses a method for predicting the residual height of an ultrasonic elliptical vibration turning surface. According to the method, a numerical method for solving the residual height introduced in the cutting direction by ultrasonic elliptical vibration turning is established on the basis of a simple harmonic vibration time reversal symmetry principle according to the principle that ultrasonic simple harmonic vibration has motion displacement symmetry and time reversal symmetry about a balance position in a complete period. The method can be suitable for calculating the theoretical residual height of common plane cutting and slope cutting in the cutting direction. According to the method, a new thought is provided for calculation of the theoretical residual height of the ultrasonic elliptical vibration cutting surface, and the reasonability of ultrasonic elliptical vibration auxiliary ultra-precision cutting process parameter selection can be judged in an auxiliary mode in actual production.

The invention discloses a simple harmonic vibration analysis method based on a modal superposition method, and the method comprises the steps: carrying out the modal analysis of a three-dimensional model of equipment, and obtaining a solution of the modal space of the equipment; a periodic load is obtained, the previous solution of the modal space is selected as the solution of the displacement response of the system in the physical space, the system motion equation under the simple harmonic vibration after coordinate transformation is solved, and a frequency response curve of the equipment structure is obtained; whether the maximum deformation value of the equipment structure under the action of the corresponding periodic load is smaller than an allowable value or not is analyzed by combining the frequency response curve of the equipment structure, and if yes, it is verified that the equipment design meets the requirement; otherwise, verifying that the equipment design does not meet the design requirement, performing reinforcement design on the part with weak structural strength, and repeating the steps until the equipment design meets the requirement. The method ensures that the use of the equipment is not influenced when the equipment is subjected to specified periodic load, and is used for improving the product design efficiency and shortening the equipment design period.

The application discloses a flexible robot joint harmonic reducer high-frequency resonance suppression method, relates to the technical field of servo system control, and can solve the problem of low mechanical arm position tracking precision and torque output precision caused by the influence of high-frequency resonance and nonlinear transmission torque caused by the physical structure and assembly error of the harmonic reducer itself in the control of the robot flexible joint driven by the harmonic reducer. The application comprises the following steps: in the first step, a corresponding mathematical model is constructed according to the dynamics relationship of the flexible joint of the mechanical arm. In the second step, appropriate parameters are selected, and a harmonic disturbance observer is designed to online and real-time estimate the high-order harmonic vibration caused by the flexibility of the harmonic reducer. In the third step, the harmonic disturbance estimation value obtained in the second step is combined with the PD feedback controller of the flexible joint of the mechanical arm to compensate and suppress the second harmonic disturbance of the system, thereby forming the harmonic reducer high-frequency resonance suppression method of the flexible joint of the mechanical arm.

The invention provides a method for reducing quenching residual stress of wear-resistant steel. The method comprises the following steps: sequentially carrying out subzero treatment, aging treatment, vibration aging treatment and spraying treatment on quenched wear-resistant steel, the vibration aging treatment comprises the operation steps that a vibration exciter is installed at the position 20-50 cm away from the center of the wear-resistant steel, and frequency spectrum harmonic vibration aging treatment is conducted for 20-40 min under the conditions that the resonant frequency is 100-180 Hz, the exciting force is 4-10 kN and the rotating speed is 6000-10800 rpm; the spraying treatment adopts a multi-stage heating method; the spraying treatment adopts a multi-stage heating method. According to the method, deep cooling, aging, vibration aging, spraying and other processes are combined for treatment, vibration exciters are arranged at reasonable positions, and multi-stage heating is conducted through spraying water, so that the residual stress in the wear-resistant steel can be effectively reduced, the dimensional stability of the steel can be guaranteed, and the steel is not prone to cracking and deformation in the subsequent machining process.

The utility model provides a damping and forced simple harmonic vibration experiment device based on digitization, which comprises a base, double supporting rods and an oscillation device, the base is perpendicular to the double supporting rods and is detachably fixed with the double supporting rods, a short supporting rod is transversely arranged at the top of the double supporting rods, a first rotation sensor is arranged on one of the double supporting rods, and a second rotation sensor is arranged on the other of the double supporting rods. The other supporting rod is provided with a second rotation sensor and an oscillation device from top to bottom, the oscillation device is connected with one end of a thin rope, and the other end of the thin rope is sequentially connected with the second rotation sensor, a first spring, the first rotation sensor and a second spring and is finally fixed to the end, close to one side of the rotation sensor, of the short supporting rod; the first rotation sensor, the second rotation sensor and the oscillation device are connected with a control center. The experimental device aims at achieving the objectives that the experimental phenomenon is concrete, the device has an obvious vibration phenomenon, and the device is provided with a visual damping adjusting device and an adjustable continuous periodic external force providing device. And meanwhile, software data is visualized.

A fluid valve and a fluid supply system comprising the fluid valve. The fluid valve comprises: a valve body; an elastic device; a valve core slidably arranged on the valve body in a fluid flowing direction, wherein the elastic device is arranged between the valve core and the valve body, a pressure-receiving surface is formed on a liquid inlet side of the valve core, and the force on the pressure-receiving surface is opposite to the force exerted by the elastic device on the valve core, and when the valve core slides relative to the valve body in a direction in which a valve port formed between the valve core and the valve body becomes smaller, the elastic deformation amount of the elastic device increases; and a sound monitoring device used for detecting vibration sound generated by the valve core operating within a predetermined flow rate range. The valve core and the elastic device form a simple harmonic vibration. When the flow rate reaches a preset flow rate, the valve core generates corresponding vibration sound, and the vibration sound is detected by the sound monitoring device, thereby achieving a flow monitoring effect, and effectively solving the problem of poor flow rate monitoring performance of existing fluid valves.

This invention belongs to the field of visual light source impact testing technology and discloses a visual light source durability testing device. The device includes three circumferentially distributed testing platforms. An adjustment unit is located on one side of each testing platform, and a vibration unit and an impact unit are respectively located on either side of the adjustment unit. The vibration unit drives the angle cylinder to rotate and displaces the end rod through pitch gears meshing with open gears of different opening radii, changing the compressibility of the return spring to achieve multi-frequency vibration simulation. The compressed return spring can enter the non-harmonic vibration range. The impact unit achieves multi-dimensional impact through planetary gears and eccentric gears combined with a two-axis linkage mechanism. The adjustment unit achieves synchronous switching between multiple workstations through gear transmission and gear belt linkage. This invention solves the problems of existing testing equipment having a single vibration frequency band, unrealistic simulated environment, and insufficient impact dimensions. It can comprehensively assess the structural stability of visual light sources, improve the realism and efficiency of testing, and is suitable for batch testing scenarios.

The invention belongs to the technical field of welding residual stress elimination. According to the collaborative elimination method and system for the welding residual stress of the welded component, frequency spectrum harmonic vibration aging treatment is conducted on the welded component so that the residual stress of the welded component in the first stage can be eliminated; after the residual stress in the first stage is eliminated, the residual stress distribution state of the welding component after the initial residual stress is eliminated is obtained, and a to-be-eliminated area with the welding tensile stress larger than a first set threshold value and the working load larger than a second set threshold value is selected according to the residual stress distribution state; and local weld joint ultrasonic impact treatment is conducted on the to-be-eliminated areas, so that second-stage residual stress elimination is conducted on the welded component till the residual stress of all the to-be-eliminated areas is eliminated. According to the method, the problem of poor effect of a single residual stress eliminating scheme is solved, the peak value of the welding residual stress of the welding component is greatly reduced and is more uniform, and then the dimensional precision of the welding component is guaranteed.

The invention discloses a damping-adjustable railway vehicle vertical vibration simulation system and method, and relates to the technical field of railway vehicle dynamics experiment equipment. Real wheel track excitation can be highly simulated, and accurate and controllable testing can be carried out on the vertical dynamic response of the suspension system. The system comprises a supporting module, a weight module and at least one excitation generation module, the supporting module comprises a bottom plate; the weight module comprises a weight supporting seat weight; the excitation generation module comprises a base, a motor, an eccentric wheel, a transmission frame, a spring and a damper; the base is connected to the bottom plate; the fixed end of the motor is connected to the base, and the output end is connected with the eccentric wheel; two ends of the transmission frame are respectively connected with the axle of the eccentric wheel, the spring and the damper; the transmission frame can convert the rotary motion of the eccentric wheel into vertical simple harmonic vibration; the rigidity of the spring and the damping coefficient of the damper are adjustable; the weight supporting seat is connected to the spring and the damper; the invention further discloses a simulation method based on the system.

The invention belongs to the technical field of visual light source impact detection, and particularly relates to visual light source durability detection equipment which comprises a detection pedestal, an adjusting unit is arranged in a space on one side of the detection pedestal, a vibration unit is arranged on one side of the adjusting unit, and an impact unit is arranged on the other side of the adjusting unit. According to the invention, the compressibility between the reset spring and the carrier and the detection pedestal is changed, and the amplitude and the deformation quantity of the reset spring in the current state are relatively reduced relative to those in the initial state, so that the anti-vibration detection of the visual light source in different frequency bands is realized, the detection interval is expanded, and the detection precision is improved. Meanwhile, the compressed reset spring gradually enters a non-simple harmonic vibration interval, at the moment, linear hypothesis is invalid, vibration waveform distortion is generated, the authenticity of a vibration simulation environment is improved, the vibration detection effect is improved, structural design defects are exposed in advance, and the reliability of the vibration simulation environment is improved. And the mechanical reliability is improved from the source.

The application relates to the technical field of electric transmission and control, and discloses a bearing-free composite rotor cage asynchronous motor multi-frequency harmonic vibration compensation control method and system. The bearing-free composite rotor cage asynchronous motor multi-frequency harmonic vibration compensation control method comprises the following steps: collecting a bearing-free composite rotor cage asynchronous motor rotor radial displacement signal; constructing an input vector containing a direct current item and multi-order cosine and sine components; using an adaptive linear neuron algorithm to decompose the signal and extract direct current, a fundamental wave and each order harmonic component; using an extended linear active disturbance rejection controller to observe total disturbance containing low-frequency slow change and harmonic disturbance; calculating compensation force according to the harmonic component; superimposing the compensation force and basic suspension force to form a total control force instruction; driving a suspension winding through force-current conversion; and inhibiting multi-frequency harmonic vibration. The application effectively improves harmonic separation precision and disturbance suppression capacity, and provides a reliable theoretical guarantee for high-speed bearing-free motor control.

An operator device for a capacitive sensor. The device includes an electronic device, by means of which an actual gap distance between the seismic mass and the at least one electrode and / or an actual variable for a sensitivity of the capacitive sensor can be determined, taking into account at least a first constant voltage, a first natural frequency of a first harmonic vibration of a seismic mass along a spatial direction, centrally intersecting the seismic mass and the at least one electrode, when the first constant voltage is applied between the seismic mass and the at least one electrode, a second constant voltage and a second natural frequency of a second harmonic vibration of the seismic mass along the spatial direction, centrally intersecting the seismic mass and the at least one electrode, when the second constant voltage is applied between the seismic mass and the at least one electrode.

The invention provides a nanoscale resolution vector electric field imaging device, and relates to the field of quantum imaging. The vector electric field imaging device comprises a quartz tuning fork which is movably arranged relative to the upper surface of a to-be-tested sample and is configured to perform simple harmonic vibration along a first direction; the probe is fixedly arranged on the lower surface of the quartz tuning fork and is configured to perform simple harmonic vibration along the first direction along with the quartz tuning fork, and an NV color center is carried in the probe; the microwave radiation module is configured to emit microwave pulses to the probe when the probe is located at the highest point or the lowest point of simple harmonic vibration, so that the NV color center accumulates phase information; the fluorescence acquisition module is configured to send laser to the probe and acquire fluorescence excited by the NV color center to obtain a fluorescence signal; and a processing module configured to perform vector electric field imaging based on the fluorescence signal.

The utility model discloses a kind of multi-resonance broadband direct-drive vibration damper, including shell, fundamental frequency vibration damper component and harmonic vibration damper component, fundamental frequency vibration damper component includes two identical fundamental frequency vibration damper units, harmonic vibration damper component includes two identical harmonic vibration damper units, fundamental frequency vibration damper unit and harmonic vibration damper unit respectively include eccentric mass, inner casing, outer casing and frameless motor, inner casing and outer casing are respectively sleeved on the protruding shaft of eccentric mass both sides, bearing is equipped between inner casing, outer casing and eccentric mass shaft, frameless motor is fixedly installed in outer casing, frameless motor rotor is fixedly connected with eccentric mass shaft, the two fundamental frequency vibration damper units of the composition fundamental frequency vibration damper component are coaxial and the inner casing side is arranged oppositely, the two harmonic vibration damper units of the composition harmonic vibration damper component are coaxial and the inner casing side is arranged oppositely, fundamental frequency vibration damper component and harmonic vibration damper component are installed in shell and coaxial arrangement.