26 results about "Resonance amplitude" patented technology

The SERF gyroscope multi-parameter in-situ measurement method based on transverse magnetic field resonance first measures the amplitude-frequency characteristic curve of SERF atomic spin gyroscope Bx, By alternating current magnetic field response, then finds the resonance frequency and resonance amplitude value corresponding to the alkali metal electron resonance peak in x and y directions respectively, and finally constructs an equation through the ratio of the resonance frequency and resonance amplitude value corresponding to the alkali metal electron resonance peak in x and y directions, and obtains the accurate values of the electron magnetic field, the slowing factor and the electron transverse relaxation rate through the global optimization function algorithm. The present application can realize the in-situ accurate measurement of the electron magnetic field, the nuclear magnetic field, the electron polarizability, the nuclear polarizability, the slowing factor and the electron transverse relaxation rate of the SERF atomic spin gyroscope without changing the system state.

The invention relates to the technical field of non-electrical variable adjustment, and discloses a path adjustment method for an aircraft transfer platform in a multi-layer transfer scene, which comprises the following steps: acquiring the quality of a controlled object borne by a first positioning unit, mapping the fundamental frequency resonance amplitude of a system based on the quality of the controlled object, and setting a dynamic dead zone threshold value; translating the physical displacement deviation into a feature node coordinate in a parameterized spatial map, extracting an instantaneous geometric feature of a non-uniform rational B-spline curve and converting the instantaneous geometric feature into a driving compensation vector, monitoring a pose deviation generated by residual mechanical oscillation of the first positioning unit, and when the pose deviation exceeds a dynamic dead zone threshold value, determining that the first positioning unit is in a dynamic dead zone; according to the method, a static waiting time sequence is reconstructed into a dynamic accompanying compensation process, the restriction of mechanical oscillation on the operation rhythm is eliminated, and the material flow volume of a transfer system is increased.

The present application relates to the technical field of tooling, and particularly relates to a resonance loosening method and system for a casing-coupling sub-system. The method comprises: obtaining a make-up torque of the casing-coupling sub-system, determining a maximum loosening torque according to the make-up torque; determining basic parameters of the casing-coupling, establishing a finite element model according to the basic parameters, carrying out modal simulation analysis and test measurement according to the finite element model, and determining an inherent frequency of the casing-coupling sub-system, a position of an excitation point and an excitation acceleration; according to the excitation point and the excitation acceleration, a middle / high frequency excitation device is used to apply vibration excitation under the inherent frequency to the casing-coupling sub-system, a larger resonance amplitude and resonance acceleration are excited in the casing-coupling sub-system, a violent transverse or longitudinal swing is generated at the coupling, a loosening effect is generated, the loosening torque of the casing-coupling sub-system is significantly reduced, and efficient unmake-up is ensured.

Provided is an integrated micro-electromechanical systems (MEMS) ultrasonic transducer (UT). The integrated MEMS UT (MUT) includes a capacitive MUT body, and a piezoelectric structure provided on a resonant plate of the capacitive MUT body. In embodiments of the present disclosure, the piezoelectric structure forms a piezoelectric MUT with the resonant plate and a chamber in the capacitive MUT body, and the piezoelectric MUT and the capacitive MUT body share the resonant plate to obtain the integrated MUT. The embodiments of the present disclosure integrate the advantages of piezoelectric MUT and the capacitive MUT, and achieve the effect of improving the receiving sensitivity while not affecting the resonance amplitude and the output sound pressure.

A method for examining a robot apparatus which includes a driving source configured to drive a joint, the position and orientation of which are controlled based on trajectory data determined in advance for a normal motion. The examination method includes generating examination motion data for driving a joint as an examination target under a driving speed that causes the examination target joint to resonate and causing the examination target joint to pass through a path based on the trajectory data. A resonance amplitude of the joint is acquired based on the examination motion data.

The invention discloses a piezoelectric film acoustic sensor packaging design method, device and system, and the method comprises the steps: obtaining a pre-constructed multi-physical field coupling optimization model, a target function of the multi-physics field coupling optimization model is constructed by taking maximization of sound pressure sensitivity, minimization of frequency deviation and minimization of a parasitic common amplitude value as targets; a Bayesian global optimization algorithm is adopted, the multi-physics field coupling optimization model is solved, piezoelectric film acoustic sensor packaging parameters are obtained, a CNN model is adopted as an agent optimization model in the Bayesian global optimization algorithm and used for fitting a target function of the multi-physics field coupling optimization model, and in the solving process, the packaging parameters of the piezoelectric film acoustic sensor are obtained. The weights of different optimization sub-targets are dynamically adjusted according to the environmental parameters, and the optimization sub-targets comprise the maximum sound pressure sensitivity, the minimum frequency deviation and the minimum parasitic common amplitude value. The anti-interference performance and the stability of the piezoelectric film acoustic sensor can be improved.

The present application discloses a method and system for measuring a magnetic moment parameter, a storage medium, and an electronic device. The method comprises: measuring, under a target gradient field, a resonant frequency and a resonance amplitude of a sample rod with a magnetic sample to be measured mounted thereon, wherein the target gradient field is generated by a magnetic field system; acquiring a mass of the magnetic sample to be measured, and determining, according to the mass, the resonant frequency, and the resonance amplitude, a magnetic force exerted on the magnetic sample to be measured within the target gradient field; and determining, according to the magnetic force exerted on the magnetic sample to be measured and a current parameter of a gradient coil within the magnetic field system, a magnetic moment parameter of the magnetic sample to be measured. The present application addresses the problems in the related art of high equipment costs and low measurement accuracy when performing magnetic measurements on magnetic samples to be measured.

A detection method and system for an optical microcavity sensor. The detection method for an optical microcavity sensor is applied to an optical mode localization effect-based optical microcavity sensor. The detection method for an optical microcavity sensor comprises: acquiring an output spectrum of an optical mode localization effect-based optical microcavity sensor, the output spectrum comprising a symmetric peak and an antisymmetric peak; measuring, in the output spectrum, a first resonance amplitude corresponding to the symmetric peak and a second resonance amplitude corresponding to the antisymmetric peak; and on the basis of the first resonance amplitude and the second resonance amplitude, demodulating to obtain a target detection physical quantity of the optical mode localization effect-based optical microcavity sensor. On the basis of the resonance amplitudes of the symmetric peak and the antisymmetric peak, the target detection physical quantity is obtained by means of demodulation, thereby realizing accurate measurement of the target detection physical quantity, and reducing the effect of physical quantity changes in the environment.

The application provides a kind of capacitance measuring device, method and chip probe test system.The capacitance measuring device includes probe plate and capacitance measuring circuit, probe plate includes probe, and capacitance measuring circuit includes LC resonant circuit and current drive unit.LC resonant circuit is used to be connected in parallel with the two poles of probe and the chip to be measured, LC resonant circuit has no-load state and loaded state, when probe and the chip to be measured do not contact, LC resonant circuit is in no-load state;When probe and the chip to be measured are in contact, LC resonant circuit is in loaded state.Current drive unit is used to provide driving current for LC resonant circuit, to make LC resonant circuit produce resonance, and resonance amplitude is lower than the opening voltage of the diode inside the chip to be measured.Capacitance measuring device is used to obtain the capacitance of the chip to be measured based on the data of the resonance waveform of LC resonant circuit in loaded state and no-load state, by calculating processing to obtain the capacitance offset of LC resonant circuit.

To provide a cell separation device enabling appropriate control and efficient cell separation regardless of the combination with a culture substrate.SOLUTION: A signal output unit that outputs an AC signal, a vibration member that vibrates according to a frequency of the AC signal, a vibration transmission member that transmits vibration of the vibration member to the base material, an amplitude detection unit that detects an amplitude of vibration of the vibration transmission member, a resonance information acquisition unit that acquires resonance information, and a drive control unit that controls output of the AC signal based on the amplitude detected by the amplitude detection unit and the resonance information, wherein the resonance information includes resonance point information that is information related to a resonance amplitude peak of the vibration transmission member, the drive controller controls the output of the AC signal within a predetermined range between the frequency corresponding to a peak top and the frequency corresponding to one of a peak start and a peak end of the one resonance amplitude peak.SELECTED DRAWING: Figure 1

The invention belongs to the field of microwave measurement and magnetic material characterization, and relates to a grounding coplanar waveguide clamp for broadband ferromagnetic resonance test, which comprises a dielectric substrate (thickness h), a central signal line and a metal conductor layer on the upper surface of the dielectric substrate, and a grounding conductor plane on the lower surface of the dielectric substrate, the interval gap between the central signal line (width s) and the metal conductor layers on the two sides is a slot line, and the width is w; through holes are formed in the metal conductor layer, and the metal conductor layer is electrically connected with the grounding conductor plane through each through hole, so that a grounding coplanar waveguide structure is formed; the method comprises the following steps: defining dimensionless parameters u = w / (w + 2s) and eta h = h / (w + 2s), and limiting the dimensionless parameters to meet 0.35 < = u < = 0.50 and 0.15 < = eta h < = 0.26, and obtaining a higher resonance amplitude, a lower baseline ripple and a higher signal-to-noise ratio while keeping 50 omega + / -5% matching. The clamp is simple in structure, easy to machine and suitable for high-frequency magnetic measurement scenes such as ferromagnetic resonance and vector networks.

The application discloses a micro magnetic sensor combined with electromagnetic induction and Lorentz force and a preparation method thereof. The sensor comprises a high-frequency resonance component, a low-frequency resonance component and a coupling beam between the two components. The high-frequency resonance component comprises a driving electrode, a high-frequency resonance structure, a first insulating layer on the side of the high-frequency resonance structure, a Lorentz force driving coil, a second insulating layer on the side of the high-frequency resonance structure, a metal shielding layer, a third insulating layer on the side of the high-frequency resonance structure and an electromagnetic induction coil. The low-frequency resonance component comprises an induction electrode, a low-frequency resonance structure, an insulating layer on the side of the low-frequency resonance structure and a metal coil. The application establishes a composite magnetic sensitive architecture of electrostatic driving-electromagnetic induction and Lorentz force driving-electrostatic sensitivity on the internal resonance coupling structure, so as to improve the magnetic sensing performance through the superposition of two types of magnetic sensitive output signals. Meanwhile, the low-frequency resonance amplitude amplification effect of internal resonance is utilized to realize that the low-frequency resonance structure plate capacitor serves as a magnetic sensing signal output, so as to reduce the power consumption of the Lorentz force type magnetic sensitive element.

The application discloses a kind of musical instrument audio signal intelligent analysis methods based on clancy figure, it is related to musical instrument manufacturing technical field, steps include: obtaining clancy figure, extracting symmetry axis angle distribution and wood texture main direction and obtaining offset angle;Wood texture anisotropic distribution area is identified based on offset angle, determine abnormal resonance energy propagation path, combine edge detection calculation panel vibration uniform area ratio, obtain resonance frequency purity percentage;With offset angle, correlation strength is constructed, input preset mapping obtains length-width modulus ratio fusion result, combined with finite element simulation to obtain panel cutting angle adjustment amount;According to adjustment amount, update modulus ratio, geometric symmetry coverage area ratio and energy dissipation space position distribution;Compare distribution before and after optimization, evaluate abnormal resonance amplitude reduction and symmetry axis angle distribution, determine the matching relationship and optimization direction of texture and symmetry axis, output final cutting angle scheme.

The application discloses a double-dimension multi-gas sensor based on artificial plasmons and a gas detection system, wherein the sensor comprises, from bottom to top, a grounding plate, a dielectric substrate, a metal microstrip transmission line, a bottom sensitive dielectric layer, an artificial plasmon resonator and a first conductive layer and a second conductive layer at the same height level; the sensor is based on a vertical laminated structure to construct single-resonator double-dimension orthogonal decoupling; wherein the artificial plasmon resonator and the bottom sensitive dielectric layer construct a response mechanism of 'bottom dielectric constant-resonance frequency shift' to a target gas A; the artificial plasmon resonator and the first conductive layer and the second conductive layer construct a response mechanism of 'top layer conductivity-resonance amplitude modulation' to a target gas B. The application utilizes a vertical laminated structure to construct two independent detection dimensions on the projection area of only one single resonator, and realizes simultaneous detection and decoupling of two gases.

The application discloses a piezoelectric thin film acoustic sensor packaging design method, device and system, the piezoelectric thin film acoustic sensor packaging design method includes obtaining a pre-constructed multi-physical field coupling optimization model, the objective function of the multi-physical field coupling optimization model is constructed to maximize the sound pressure sensitivity, minimize the frequency offset and minimize the target function of the parasitic resonance amplitude; a Bayesian global optimization algorithm is used to solve the multi-physical field coupling optimization model to obtain the piezoelectric thin film acoustic sensor packaging parameters, the CNN model is used as the proxy optimization model in the Bayesian global optimization algorithm, which is used to fit the objective function of the multi-physical field coupling optimization model, and in the solving process, the weights of different optimization sub-targets are dynamically adjusted according to the environmental parameters, and the optimization sub-targets include maximizing the sound pressure sensitivity, minimizing the frequency offset and minimizing the parasitic resonance amplitude. The application can improve the anti-interference and stability of the piezoelectric thin film acoustic sensor.

The invention discloses an energy storage cooperative control method with resonance suppression, and belongs to the technical field of energy storage system control. Comprising the following steps: 1) collecting operation state parameters of multiple energy storage units and electrical quantity data of a grid-connected point, and identifying resonance characteristics such as resonance frequency, a common amplitude value and a resonance attenuation coefficient in real time in a mode of combining frequency domain analysis and modal identification; 2) adaptively determining a dynamic resonance suppression factor according to the resonance characteristic parameters, establishing a multi-objective optimization rule in combination with the power response capability, residual capacity and loss characteristics of the energy storage unit, and generating a cooperative control strategy with resonance suppression; a resonance suppression mechanism is deeply integrated into cooperative control, coupling optimization of the two is realized through dynamic resonance suppression factors, the common amplitude suppression ratio is high, and system oscillation is effectively avoided; by adopting a real-time resonance identification and closed-loop adjustment mechanism, the dynamic resonance characteristics under complex working conditions are adapted, the power response delay is low, and the dynamic response performance of the system is improved.

The invention discloses a millisecond-level power compensation control method, which belongs to the technical field of energy storage system control, and comprises the following steps: 1) collecting operation data of an energy storage system, including power grid side voltage and current signals, output power of each energy storage unit, SOC of the energy storage unit and power grid frequency deviation; (2) an improved FFT wavelet transform fusion algorithm is adopted for resonance detection, a resonance frequency interval is rapidly positioned, resonance characteristic parameters are finely extracted, and the resonance characteristic parameters comprise the resonance frequency, the common amplitude value and the resonance attenuation coefficient; 3) constructing a cooperative control objective function containing a resonance suppression weight, and taking power grid frequency stability, power grid voltage stability, energy storage unit SOC equalization and co-amplitude value minimization as optimization objectives; according to the invention, integrated control is realized, resonance detection, active suppression and multi-target cooperative control are deeply fused, the problem that resonance detection and active suppression conflict with multi-target cooperative control in the prior art is solved, the operation stability of the energy storage system is greatly improved, and interference of resonance to cooperative control is avoided.

The application discloses an optimization method and system for improving the scanning angle of an electrostatic MEMS (Micro Electro Mechanical System) mirror, which comprises the following steps: establishing a dynamic equation of the electrostatic MEMS mirror, obtaining a driving torque, and establishing a driving torque expression; establishing a finite element model of a driver with different comb-to-shaft distances, simulating the finite element model, obtaining the relationship between the capacitance of different drivers and the angle, fitting the obtained relationship between the capacitance of different drivers and the angle, and obtaining a driver capacitance expression; obtaining an expression of a resonance amplitude based on the obtained driver capacitance expression, the driving torque expression and the dynamic equation of the electrostatic MEMS mirror, and obtaining the resonance amplitude of the electrostatic MEMS mirror under different comb-to-shaft distances based on the expression of the resonance amplitude; and selecting the comb-to-shaft distance corresponding to the maximum value in all resonance amplitudes to optimize the driver of the MEMS mirror. The MEMS mirror can reach the maximum scanning angle, thereby meeting the demand of the electrostatic MEMS mirror in a large field of view application scenario.

An in-ear earphone device for insertion into a person's ear canal is disclosed. The in-ear earphone device comprises a noise microphone, a loudspeaker and a signal processor arranged to provide an active noise control signal based on a recorded audio signal from the noise microphone, wherein the loudspeaker is arranged to reproduce the active noise control signal in the ear canal. In addition, the device comprises a damped vent comprising one or more vent elements and one or more dampening elements, the damped vent being arranged to couple the ear canal to an external acoustic environment. The damped vent is characterized by an inward vent transfer function H VI from the external acoustic environment to the ear canal. The damped vent is arranged to dampen an acoustic resonance of the one or more vent elements such that the inward vent transfer function H VI has a resonance amplitude ratio in a resonance frequency range from 100 Hz to 2 kHz of at most 3 dB. The damped vent is arranged to provide a reference amplitude in a reference frequency range from 20 Hz to 100 Hz of at most 3 dB larger than the inward vent transfer function H VI .

The invention belongs to the technical field of vibration control, and particularly relates to a semi-automatic self-adaptive vibration reduction system integrated with a magnetorheological damper, passive multi-level rigidity self-adaption is achieved through a composite vibration isolation device composed of a first elastic piece, a second elastic piece and a rubber vibration reduction mechanism, the soft start vibration isolation requirement during low load can be met, and the vibration reduction effect is good. The device can also adapt to the hard bearing working condition under high load or impact, and the resonance amplitude is effectively restrained; the control mechanism regulates and controls the magneto-rheological vibration reduction mechanism, real-time, continuous and reversible regulation of damping force is achieved, and the suppression capacity and vibration attenuation efficiency of the system on broadband vibration, especially formants are improved. And the force flow distribution is optimized and the structural stability is enhanced due to the arrangement of the rubber damping mechanisms at equal intervals in the circumferential direction. The problems that a traditional vibration isolation device is fixed in rigidity and damping, poor in adaptability, prone to stress concentration and weak in resonance suppression capacity are solved, and the efficient, self-adaptive and high-reliability vibration reduction effect is achieved.

The application relates to the technical field of electronic control, in particular to a control method, device and system of a sensor, equipment and a storage medium. The method comprises the following steps: obtaining a current excitation signal; performing frequency sweeping on the resonant sensor based on the current excitation signal to obtain a current frequency sweeping response signal; determining a current resonance amplitude of a resonance point in the current frequency sweeping process according to the current frequency sweeping response signal; adjusting the amplitude of the current excitation signal to obtain an adjusted amplitude when the current resonance amplitude exceeds a preset amplitude range; determining an excitation signal based on the adjusted amplitude, and performing frequency sweeping on the resonant sensor again by taking the excitation signal as the current excitation signal until the current resonance amplitude is within the preset amplitude range. The method can adaptively adjust the response signal amplitude of the control system, so that the method can be applied to frequency sweeping and closed-loop control of resonant sensors of different specifications, and control of resonant sensors in different test environments.

Based on the dual-beam CPT vector magnetometer installation error elimination method, a model is established to analyze the angular relationship between two beams of orthogonal linearly polarized light and a standard three-axis magnetic field, thereby correcting the angular output affected by the installation error of the experimental probe device placed on the generating device platform. Two linearly polarized light beams with mutually orthogonal propagation directions are used to configure the CPT magnetometer. Based on the relationship between the three key vectors of the laser wave vector K, the polarization direction e, and the magnetic field direction B and the CPT resonance amplitude, the angular output of the proposed CPT magnetometer magnetic field vector is modeled and analyzed, thereby obtaining an analytical solution for the magnetic field angle. However, the prerequisite of this model is that the two beams need to be configured orthogonally, which is difficult to achieve in actual situations. Based on the dual-beam measurement model, the present invention proposes a solution for correcting installation errors, and theoretically analyzes and discusses how to obtain the installation error angle and correct the magnetometer angle output when the system has installation errors.

The utility model discloses a kind of connecting structure and electrical module, it is related to cable technical field, wherein, connecting structure is used to one side connection electrical shell, the other side connection wire harness, connecting structure includes terminal and resonance adjustment structure, the one side of terminal is used to with the shielding layer of the wire harness Electric connection, the other side is used to with the electrical shell Electric connection, to the shielding layer ground connection;The resonance adjustment structure is used to with the shielding layer, the terminal and the electrical shell series connection arrangement, to reduce the resonance amplitude value of the shielding layer.The technical scheme provided by the utility model reduces the inherent resonance amplitude value of the shielding layer of wire harness, avoids electromagnetic interference problem.

The utility model provides a high-efficiency stable DC motor, which comprises a motor body, an arc-shaped plate is arranged at the bottom of the motor body, the arc-shaped plate is fixed on the motor body in an attached manner, supporting legs are symmetrically arranged on two sides of the arc-shaped plate, a supporting plate is arranged at the tail ends of the supporting legs, and the arc-shaped plate is fixed on the motor body. And mounting holes are formed in the supporting plate. According to the high-efficiency stable DC motor provided by the utility model, the arc-shaped plate is attached to the motor body, vibration stress is dispersed, resonance amplitude is reduced, the symmetrical supporting legs provide multi-point rigid support, overall stability is enhanced, high-torque output requirements are met, equipment integration is simplified by the design of the mounting holes of the supporting plate, and the high-efficiency stable DC motor is adaptive to various mounting scenes.

The application discloses a casing well cement bonding two-interface ultrasonic echo separation method, which comprises the following steps: moving the waveforms in time, aligning casing inner wall echoes of all waveforms in a cycle; removing the casing inner wall echoes of all waveforms in a cycle; calculating resonance amplitudes of all waveforms in a cycle, and normalizing the waveforms with the amplitudes; selecting any waveform as a reference waveform, adjusting the remaining waveforms, so that the remaining waveforms have the same resonance wave period or center frequency as the reference waveform, and the time sampling interval remains unchanged; moving the adjusted waveforms in time, aligning the resonance waves of all waveforms with the resonance waveform of the reference; superimposing and averaging adjacent waveforms of each aligned waveform to obtain a smoothed waveform set; subtracting the smoothed waveform from the aligned waveform to obtain separated two-interface ultrasonic echoes; and restoring the separated two-interface ultrasonic echoes to the original amplitude and period. According to the application, the two-interface ultrasonic echoes can be effectively separated by collecting waveforms in one cycle, the processing speed is fast, and the demand for calculation memory is small.

The application discloses a double-dimension multi-gas sensor based on artificial plasmons and a gas detection system, wherein the sensor comprises, from bottom to top, a grounding plate, a dielectric substrate, a metal microstrip transmission line, a bottom sensitive dielectric layer, an artificial plasmon resonator and a first conductive layer and a second conductive layer at the same height level; the sensor is based on a vertical laminated structure to construct single-resonator double-dimension orthogonal decoupling; wherein the artificial plasmon resonator and the bottom sensitive dielectric layer construct a response mechanism of 'bottom dielectric constant-resonance frequency shift' to a target gas A; the artificial plasmon resonator and the first conductive layer and the second conductive layer construct a response mechanism of 'top layer conductivity-resonance amplitude modulation' to a target gas B. The application utilizes a vertical laminated structure to construct two independent detection dimensions on the projection area of only one single resonator, and realizes simultaneous detection and decoupling of two gases.