836 results about "Vibration measurement" patented technology

The invention relates to the technical field of mechanical vibration testing, in particular to a method for testing dynamic rigidity and damping characteristics of an engine support, which comprises the following steps of: 1, simulating a boundary; step 2, double-source excitation loading is carried out; step 3, dynamic response acquisition: arranging vibration measurement points in the main shaft direction of the rigidity of the support to acquire acceleration signals in three directions, synchronously acquiring excitation force signals, and recording all the signals at a set sampling rate after anti-aliasing filtering; 4, constructing a frequency response matrix: performing time-frequency transformation on the exciting force signal and the acceleration signal, and calculating a cross-point frequency response function matrix; 5, parameter decoupling calculation is carried out, wherein parameter decoupling is achieved through cross iterative optimization; and 6, outputting parameters. Through the decoupling calculation of the low frequency band and the high frequency band, the cross iteration optimization method can effectively reduce the calculation error, improves the parameter decoupling precision, and guarantees the reliability of the test result under different frequency bands.

The invention discloses a full-automatic cable vibration high-precision measurement method based on a machine vision technology, and relates to the technical field of structural vibration measurement. The method comprises the following steps: installing and calibrating equipment, and ensuring that a cable plane coincides with an imaging plane; high-frame-rate video acquisition is carried out, and comparison verification is carried out in combination with an accelerometer; screening effective pixels based on the pixel intensity time sequence variance, and constructing a pixel intensity space-time matrix by using the time sequence of the pixels; sVD decomposition is adopted to extract an accumulated energy ratio gt; 90% of the main modes are reconstructed, and real signals are revealed; a plurality of inhaul cables are automatically positioned and coded through gradient features and Hough transform; sub-pixel-level vertical displacement is calculated by applying an optical flow method, and median filtering is combined to resist noise; fourier transform is carried out to obtain a spectrogram, and a fundamental frequency is identified; and calculating cable force based on a string pulling theorem. According to the method, remote, full-field and multi-target synchronous monitoring is realized, the displacement measurement precision reaches a sub-pixel level, and a high-precision and full-automatic solution is provided for health monitoring of structures such as bridges.

The invention relates to the technical field of control and adjustment, in particular to a steam turbine fault diagnosis system based on multi-parameter fusion monitoring, which is characterized in that a quantum hybrid sensing module is used for establishing a picosecond-level space-time reference through entangled photon pair distribution, and unifying a time sequence label of multi-source heterogeneous data; the hypergraph feature extraction module loads the coefficient to a vibration measurement point vertex attribute channel, dynamically calculates a heat conduction hyperedge weight according to a rotor eccentricity inversion value, aggregates temperature field, vibration spectrum and magnetic domain features in a space-time hypergraph which retains physical topology, outputs a cross-scale aligned fusion feature tensor, and outputs a vibration measurement point vertex attribute channel; generating a diagnosis feature vector to drive a multi-scale twin experience certificate; and the federation decision module triggers a load reduction instruction according to the microscopic crack cloud picture to inhibit thermal stress sudden change, and meanwhile, the feature representation precision is improved through cloud federation optimization hyperedge weight parameters. According to the method, the problem of characterization distortion caused by time sequence asynchronization and scale mismatch of heat and machine coupling data is solved.

The invention discloses a method and device for measuring flow-induced vibration of a plate-type fuel assembly, and belongs to the field of nuclear power. The flow-induced vibration measurement method for the plate-type fuel assembly comprises the following steps: firstly, carrying out a flow-induced vibration test on a fuel plate of which the two ends are clamped and fixed, and carrying out measurement to obtain strain data and displacement data of a measurement point location on the fuel plate; establishing a simulation model of the fuel plate, simulating a flow-induced vibration behavior, verifying a calculation result and measurement data, and iterating the simulation model according to a verification result to obtain a calibration model with an error smaller than a given threshold value; a plate-type fuel assembly test piece with a plurality of fuel plates is used for carrying out a flow-induced vibration test, strain data of corresponding measurement points of the fuel plates are measured, and corresponding flow-induced vibration displacement data are given according to the strain data by using a calibration model. The invention further provides a plate type fuel assembly flow-induced vibration measuring device.

The invention provides a same-side input double-shaft compressor tester rotor concentricity reserving method, which belongs to aero-engine tests and comprises the following steps: determining thermal expansion displacement of an exhaust passage and a gear box support structure in a same-side input double-shaft compressor tester, according to the thermal expansion displacement and the axial distance, the thermal expansion displacement of the input flange of the biaxial compressor test piece and the thermal expansion displacement of the output flange of the gearbox are obtained through calculation, and then the estimated cold and hot state concentricity variation is obtained; according to the estimated cold and hot state concentricity variable quantity, the estimated cold state concentricity is calculated by taking the hot state concentricity as zero, and the rotor of the double-shaft compressor tester is arranged according to the estimated cold state concentricity; vibration measuring points and bearing temperature measuring points are arranged for testing, the operation state of the double-shaft compressor tester is judged through the vibration measuring points and the bearing temperature measuring points, and if the operation state meets the requirement, the estimated cold-state concentricity meets the requirement; and if the operation state does not meet the requirement, the estimated cold state concentricity is corrected.

The invention discloses a vibration displacement measurement method and system based on multi-source data fusion, and belongs to the technical field of vibration measurement. The vibration displacement measurement method based on multi-source data fusion comprises the following steps: acquiring motion sequence images of an elastic tube and a rigid tube through a high-speed camera, and acquiring a vibration acceleration signal of the elastic tube through an acceleration sensor; displacement tracks, obtained by the high-speed camera, of the elastic tube and the rigid tube are extracted, and a flow-induced vibration displacement time travel curve of the elastic tube is separated; performing frequency domain analysis on the displacement track data, and determining frequency bands of the rigid tube and the elastic tube; carrying out band-pass filtering on signals of the acceleration sensor based on a frequency band of flow-induced vibration, and compensating an error of an integral trend term of the acceleration sensor by utilizing time domain displacement data of the rigid tube; and carrying out secondary integration on the filtered acceleration sensor signal, and outputting corrected displacement information. By adopting the vibration displacement measurement method and measurement system based on multi-source data fusion, the problem that effective unification of measurement precision and engineering applicability cannot be realized by an existing vibration measurement method can be solved.

The invention relates to the technical field of vibration measurement, and particularly discloses a guide plate online dynamic amplitude anti-deviation laser monitoring device which comprises a fixing frame, a mounting groove is formed in the outer surface of the upper end of the fixing frame, a movable rod used for supporting a guide plate is fixedly connected to the inner side of the mounting groove, and a limiting assembly is arranged on the outer side of the movable rod. The limiting assembly comprises a notch formed in the outer surface of the guide plate, a limiting sleeve is fixedly connected to the outer surface of the movable rod, a pressing crack is formed in the outer surface of the limiting sleeve, and the limiting sleeve penetrates into the notch. By arranging the limiting assembly, when the position of the guide plate deviates, a limiting sleeve can play a role in correcting the deviation of the guide plate, so that the position of the guide plate is always in a proper position, and the influence of the position deviation of the guide plate on the measurement precision of the vibration amplitude of the guide plate can be reduced to a certain extent; and the monitoring error can be reduced to improve the monitoring precision.

The present invention discloses a method and device for simultaneously measuring the bending vibration and torsional vibration of a rotating machinery shaft. The gear disk is installed on the shaft to be measured, and the gear disk is driven to rotate by the shaft to be measured. An alternating voltage signal is output by the eddy current sensor and converted into a digital signal by the software part, so as to obtain the original vibration signal. The maximum value finding method is used twice to extract the bending vibration and torsional vibration of the shaft. Through the above method, the simultaneous measurement of the torsional vibration and bending vibration of the shaft can be realized. The same set of sensors and instruments are used for the two types of vibration measurements, and the cost is relatively low.

The invention discloses a robot vision external parameter calibration method based on blind deblurring and natural vibration measurement, and the method comprises the steps: collecting a continuous image sequence in a vibration environment through a high-frame-rate camera, extracting pixel-level motion information in combination with an advanced image deblurring deep network and an optical flow feature tracking technology, and carrying out the self-vibration measurement. And further restoring a three-dimensional displacement signal caused by natural vibration of the camera based on a pinhole imaging model, and obtaining ideal position information through frequency domain analysis to realize high-precision visual system external parameter calibration under a vibration condition.

The invention relates to the technical field of measurement of mechanical vibration or ultrasonic waves, water sound waves or infrasonic waves, in particular to a vibration liquid column hydrophone calibration device and method based on laser interferometry, and the device comprises a laser vibration meter, a hydrophone to be measured, a liquid column cavity for suspending the hydrophone to be measured, and a vibration table connected with the liquid column cavity. The to-be-measured hydrophone is detachably connected with an adjusting and positioning mechanism, the adjusting and positioning mechanism is connected with a laser vibration measuring instrument for executing vibration measurement, the adjusting and positioning mechanism and the laser vibration measuring instrument are introduced, the problem that accurate calibration of the low-frequency hydrophone cannot be achieved in the prior art is solved, and through sound field modeling calculation and correction, accurate calibration of the low-frequency hydrophone is achieved. The technical problem that the uncertainty and deviation of a hydrophone sensitivity calibration result caused by a non-uniform sound field cannot be effectively reduced in the prior art is solved.

The invention provides an aero-engine blisk health monitoring method based on digital twinning, and provides an on-line damage identification and real-time monitoring method for the fatigue damage problem of an aero-engine blisk in a service state, and the fatigue damage problem of the aero-engine blisk in the service state is solved by integrating the digital twinning technology, the model correction technology and the non-contact laser vibration measurement technology. The damage identification, positioning, quantification and early warning of the blisk in a service state are realized, and the health state of the blisk is evaluated. The method has the advantages that the precise digital twin model of the blisk obtained through model correction provides a reference model for damage identification of the blisk; by establishing a blisk health monitoring system, feedback iteration among an engine control state, a digital twin model and online measurement parameters is realized, so that whether structural damage occurs or not is judged, the damage position is positioned, the damage degree is calculated, an alarm is given when the damage amount exceeds a limit value, the repair cost is reduced, and the flight safety is ensured.

The invention discloses a well drilling vibration measurement and real-time calibration system based on a vibration sensor, and relates to the technical field of data processing. The system comprises a signal measurement part, a signal correction compensation part, a signal analysis part and a signal calibration part, the signal measuring part is used for installing a vibration sensor and an accelerometer near a drill bit or a drill column and generating a fundamental frequency vibration signal; the signal correction compensation part is used for performing stick-slip effect compensation on the fundamental frequency vibration signal to obtain a first compensation signal; calculating the resonant frequency of the drilling system; calculating the bending stress of the drill string; calculating well track deviation; the signal analysis part is used for calculating the dynamic load of the drilling system to obtain the vibration energy dissipation of the drilling system; calculating the system response of the drilling system; and the signal calibration part is used for calculating a calibration coefficient. According to the invention, the precision and calibration capability of vibration signal measurement are significantly improved.

The invention discloses a blasting vibration test-based rock mass wave velocity field measurement method, which is applied to a blasting operation area, is consistent with a tunnel blasting propulsion direction, does not need to independently open up a test area, and can obtain rock mass vibration data of a measurement point corresponding to a vibration measurement instrument after blasting only by arranging the vibration measurement instrument on an excavated tunnel bottom plate. According to the method, the rock mass average wave velocity can be rapidly and accurately calculated by combining the pre-measured error time of the vibration measurement instrument, the limitation of the arrangement distance of the vibration measurement instrument is broken through, the measurement range is remarkably expanded, the cost and difficulty of rock mass wave velocity measurement are effectively reduced, wave velocity measurement is completed under the condition that the original property of the rock mass is kept, and the rock mass average wave velocity is calculated. The actual rock mass condition of the blasting construction area is fed back in time, high adaptability to different rock mass properties is achieved, a scientific basis is provided for engineering design and construction, and safety and efficiency of construction are guaranteed.

The invention relates to an underground cavern surrounding rock three-dimensional vibration measurement method and device, and the method comprises the steps: generating a light spot meeting a preset clear condition through beam splitting laser; acquiring the vibration condition of the laser source and the vibration condition of the photographic lens; cutting the tracking record image of the light spot, and respectively calculating the relative displacement time history of the feature points and the boundary of the light spot; based on curvature, length and area changes of the circular light spot in different directions, a vertical relative displacement time travel curve of the light spot perpendicular to the surface of the surrounding rock of the target underground cavern is calculated; and differentiating the obtained plane and vertical displacement time histories to obtain corresponding vibration velocity time histories, and combining to construct the actual three-dimensional vibration velocity of each light spot. According to the embodiment of the invention, the monitoring cost is reduced, the field monitoring efficiency and the monitoring data volume are improved, the applicability in the construction environment with poor light of the underground cavern is higher, the defects of a high-speed photographing single lens in three-dimensional data representation are overcome, and effective monitoring and evaluation of three-dimensional vibration of the underground cavern are realized.

A vibronic mass flow sensor (100) comprises: a pipe inlet section (18); a vibratory S-shaped measuring pipe (10) for guiding the medium, with twofold rotational symmetry about an axis perpendicular to a measuring pipe plane; a pipe outlet section (19); at least one vibration exciter (53) for exciting bending vibrations of the measuring pipe (10) in a bending vibration mode; at least two vibration sensors for detecting vibrations of the measuring pipe; a support body (30); an inlet-side bearing body (21) and an outlet-side bearing body (22); wherein the measuring pipe (10) is rigidly connected to the support body (30) by means of the bearing bodies and is bounded by the bearing bodies; wherein the measuring pipe (10) connects to the pipe inlet and outlet sections;wherein the measuring tube (10) has two vibration nodes in an F3 bending vibration mode, which are spaced apart from the bearing bodies; wherein two damping mass bodies (56, 58) are attached to the measuring tube (10), each having a center of gravity that is no more than half the outer diameter of the measuring tube (10) from a position where, when the measuring tube is filled with water, the nearest vibration node is located.

The invention discloses a feature matching-based visual vibration measurement method for an unmarked low-texture structure, and the method comprises the steps: measuring a vibration video sequence of a target structure through employing a trained visual vibration measurement model, and obtaining a vibration measurement result; according to the visual vibration measurement model, firstly, a vibration video sequence of a target structure is input into a double-branch feature extraction module, an enhanced multi-scale feature map is extracted, global spatial position modeling and cross-frame alignment are carried out through a feature enhancement module, an enhanced low-resolution feature map is output, and then the visual vibration measurement model is obtained. The dual-stage matching optimization module generates rough matching point pairs through bidirectional Softmax and mutual nearest neighbor screening, and realizes sub-pixel-level fine matching by using differentiable expected value regression; and finally, the displacement conversion module converts the pixel coordinates into physical displacement through a calibration scale factor so as to output a vibration measurement result. According to the invention, the technical problems of low matching precision and poor environment robustness caused by lack of significant features in vibration measurement of an unmarked low-texture structure are solved.

The invention belongs to a drilling operation tool, and particularly relates to a rock breaking drilling simulation experiment bench of a drilling tool system. The rock breaking drilling simulation experiment bench of the drilling tool system is mainly composed of a main frame, a bottom frame, a hydraulic cylinder, a power module, a vibration measurement module and a bit pressure-torque measurement module. A certain drilling tool combination can be selected to perform a drilling experiment on a certain rock, a single-drill-bit rock breaking or / and while-drilling reaming rock breaking drilling operation experiment can be realized, and drilling pressure, rotating speed, torque and drilling tool and drill bit vibration and motion trail parameters are acquired in a multi-point manner; the experiment bench is provided with a hydraulic lifting device, so that conditions of a horizontal well, a vertical well, an inclined well and the like can be simulated. According to the invention, different drilling operation modes such as simulation of a horizontal well, a vertical well and different types of boreholes with different inclination angles, single-drill-bit drilling and reaming while drilling can be realized, the universality of the experiment bench is improved, and diversified and perfect experiment conditions are provided for related research.

The invention relates to the technical field of intelligent detection, and discloses a single-point laser Doppler-based explosion-proof shell pressure resistance dynamic detection method and system, and the method comprises the steps: building a detection system through arranging a plurality of laser Doppler vibration meters and a data collection system, and enabling the detection system to be used for the pressure resistance dynamic detection of an explosion-proof shell; analyzing the structure of the explosion-proof shell, outputting a finite element analysis result, determining a key area needing to be measured, and setting a plurality of measurement points based on the key area; carrying out single-point acquisition on each pre-selected measuring point in sequence, during each acquisition, carrying out a withstand voltage test on the explosion-proof shell through withstand voltage test equipment, and detecting the measuring points through a laser Doppler vibration meter to generate vibration data; and the data acquisition system records vibration data of each measurement point. According to the invention, through the single-point laser Doppler vibration measurement technology, the measurement requirements of the dynamic parameters of the explosion-proof shell can be met.

The invention discloses a single-frequency laser interference vibration measurement system and method based on optical fiber sensing. The system comprises a laser, a beam splitter, a circulator, a beam combiner, a coupler, a Faraday rotating mirror, a photoelectric detector and a data acquisition and processing module. Single-frequency laser emitted by the first laser is divided into two paths through the beam splitter, one path serves as signal light and irradiates the surface of a measured object after passing through the first circulator and the beam combiner, and reflected light returns through an original path; one path of interference signals is deflected by 90 degrees through a circulator II and a Faraday rotating mirror and then enters a photoelectric detector, the other path of interference signals directly enters the photoelectric detector, orthogonal I / Q signals are output, vibration displacement is extracted through a data acquisition and processing module by adopting a phase calculation method, and the vibration displacement is calculated through a phase calculation method. And the vibration speed is obtained through differential calculation. By optimizing the optical path design and introducing orthogonal signal processing, the system cost is reduced, and the measurement precision and the anti-interference capability are improved.

A non-contact micro-vibration measurement and fault diagnosis method based on dynamic visual signal alignment comprises the steps that firstly, a dynamic visual sensor-event camera is used for collecting event data of vibration of a rotating machine in a non-contact mode, and an event data characterization method is used for converting event streams into event frame sequences which are equal in interval, not overlapped and continuous; then micro-vibration information of each pixel point is extracted from the event frame sequence through a deep neural network, the difference of vibration signals of adjacent pixel points is reduced through a signal alignment method, and contact sensing data is used as a reference for optimizing model performance through a feature clustering method; and finally, performing intelligent fault diagnosis by using the obtained micro-vibration data. According to the invention, the applicability of the non-contact sensor in the fields of vibration monitoring and fault diagnosis of rotating machinery is improved.

The embodiment of the invention provides a high-sensitivity vibration measurement and analysis instrument. In the embodiment of the invention, the signal buffering and driving sub-module in the signal conditioning module effectively isolates the sensor from a subsequent circuit by providing high input impedance and low output impedance, the load effect of a signal source is prevented, and the integrity and stability of the signal in the transmission process are ensured. Moreover, the driver part enhances the driving capability of the signal, so that the signal can overcome the impedance of a transmission line, and the attenuation of the signal in long-distance transmission is reduced, thereby guaranteeing the quality of the signal, and enabling the adaptive gain controller sub-module to automatically adjust the gain according to the intensity of the input signal. By means of the innovative design, the system can keep the best sensitivity when facing vibration signals of different amplitudes, signal saturation is avoided, it is guaranteed that weak vibration or strong vibration can be accurately measured, and the data accuracy in the digital signal processing stage is guaranteed.

The invention discloses a full-field-domain structure high-precision deformation and vibration measurement system based on a microwave interference radar, and the system comprises an observation configuration module which is used for obtaining radar observation parameters and completing the signal transmission and reception; the signal processing module is used for preprocessing the echo signal and constructing an interference phase matrix; the phase unwrapping module is used for generating a continuous phase sequence and calculating the displacement of a reflection point; the frequency spectrum extraction module is used for extracting the frequency component and the vibration amplitude of each reflection point; the response clustering module is used for extracting reflection point clusters with similar frequency responses and constructing a vibration distribution diagram; the modal identification module is used for generating a vibration modal feature vector and marking a difference region; and the track generation module is used for generating a dynamic deformation track diagram of the full field domain structure. According to the invention, high-precision deformation and vibration mode synchronous measurement of a complex structure under full-field-domain and non-contact conditions is realized, and the precision, efficiency and intelligent level of structure monitoring are effectively improved.

The invention discloses a platform micro-vibration measurement method based on a laser inter-satellite link, which can be applied to measurement of in-orbit satellite platform micro-vibration and has the advantages of no occupation of satellite resources and simple system structure compared with a traditional mode of adopting an accelerometer for measurement. By accurately analyzing the spectrum characteristics of the micro-vibration, the source of the micro-vibration can be determined and the micro-vibration can be compensated, so that the communication reliability is improved. The platform micro-vibration measurement method based on the laser inter-satellite link comprises the following steps: 1) determining a laser terminal conversion relation according to the architecture of a laser terminal light beam pointing mechanism; 2) eliminating an environment measurement error, and fitting and eliminating a platform motion track; and 3) micro-vibration characteristic parameters are extracted.

The invention discloses a binocular camera global ultra-sensitive depth direction vibration measurement method, and relates to the technical field of structural vibration measurement. The method comprises the following steps: completing internal reference and external reference calibration of a binocular camera based on a Zhang's calibration algorithm, and ensuring the three-dimensional reconstruction precision; in image processing, effective pixels with high dynamic response are screened by calculating pixel intensity time-history variance, a pixel intensity space-time matrix is constructed, and singular value decomposition is adopted to extract front k-order modals to reconstruct the pixel intensity matrix so as to reveal real signals originally submerged in imaging noise and rounding errors. And multi-direction cost aggregation is carried out by using a semi-global matching algorithm, the parallax calculation robustness in a low-contrast scene is improved, and a high-precision depth map is generated. And depth information is converted into three-dimensional space information in combination with camera parameters, so that non-contact measurement of the vibration time travel curve in the full-field depth direction is realized.

The invention provides a vibration measurement device for motor equipment, and relates to the field of vibration measurement, and the device comprises a main body support frame, and the left and right sides of the top of the main body support frame are provided with self-locking worm gears A; a mounting angle adjusting shaft is rotationally mounted on the inner side of the main body supporting frame; self-locking worms A are arranged on the left side and the right side of the mounting angle adjusting shaft; the self-locking worm A is matched and connected with the self-locking worm gear A; guide pieces are arranged on the left side and the right side of the main body supporting frame. A mounting angle adjusting part is arranged in the middle of the mounting angle adjusting shaft; the vibration testing device can test vibration of motor equipment at different installation angles and output angles, the universality and accuracy of the vibration testing result of the device are improved, and the problem that the vibration amplitude of the motor equipment is affected to a certain extent due to installation modes at different angles is solved. And a vibration measurement result obtained by only testing plane installation does not have universality.

The invention provides a wind tunnel vibration measurement test device suitable for a large wind attack angle, and belongs to the technical field of wind tunnel vibration measurement tests.The wind tunnel vibration measurement test device comprises a fixed support, two rotary supports, an elastic stretching assembly, an elastic torsion assembly and a synchronous rotation driving mechanism, and the two rotary supports are symmetrically and rotationally installed on the fixed support; a sliding rail is arranged on the rotating support, and a sliding block in sliding fit is arranged on the sliding rail. The two ends of a segment model to be subjected to vibration measurement are rotationally installed on the two sliding blocks, and the moving direction of the sliding blocks is perpendicular to the upper plane of the segment model. The elastic stretching assemblies are correspondingly connected between the sliding blocks and the rotating supports on the same side, and the stretching direction of the elastic stretching assemblies is consistent with the moving direction of the sliding blocks. The two elastic torsion assemblies are connected between the two ends of the segment model and the sliding blocks on the same side. The synchronous rotation driving mechanism drives the rotary support, the elastic stretching assembly and the segment model to rotate synchronously. According to the invention, the accuracy of the vibration measurement result of the segment model wind tunnel test can be improved, and the universality is good.

The invention discloses a rotating blade vibration measurement method based on vision, and relates to the technical field of measurement. In order to solve the technical defect that circumferential and radial vibration displacements of a blade cannot be simultaneously and synchronously obtained in a high-speed rotating state in the prior art, the technical scheme provided by the invention is as follows: calculating the time when the blade reaches a preset measurement position based on a non-contact sensor, and respectively triggering a high-speed camera to collect circumferential and radial original images; the method comprises the following steps: performing micro motion amplification processing on an image, tracking pixel movement by using a sparse optical flow algorithm and converting the pixel movement into vibration displacement, and finally performing time domain and frequency domain feature extraction on circumferential and radial vibration data to obtain vibration feature parameters. The method is suitable for online vibration monitoring and analysis work of rotating blades of wind driven generators or aero-engines and the like under the condition of high-speed rotation.

A system and method for providing abnormality diagnosis of a mechanical device having one or more components. A sensor system, having one or more sensor devices, detects movement / vibration of one or more observed components of the mechanical device. A control system determines vibration measurements of the one or more components based on their detected motion / vibration. One or more Machine Learning (ML) and / or Artificial Intelligence (AI) techniques are utilized to determine abnormal operation of the one or more components by comparing a determined vibration measurement of an observed component against that component's expected normal vibration measurement value during operation of the mechanical device. Abnormal operation is determined when the determined vibration measurement of an observed component exceeds its expected normal vibration measurement by a threshold value.

The invention discloses a multi-medium sound field control system based on an AI algorithm, which belongs to the field of intelligence and comprises a data acquisition module, a sound field modeling module, an AI optimization control module, a self-adaptive adjustment module, a hardware execution module and the like. The data acquisition module is used for sampling and acquiring acoustic signals in air, water and a solid medium; the sound field modeling module is combined with a finite difference time domain method and a graph neural network to accurately simulate sound wave propagation; the AI optimization control module fuses near-end strategy optimization and a differential evolution algorithm to generate an optimal excitation parameter; the adaptive adjustment module is based on a model migration and contrast learning mechanism; the hardware execution module generates a controllable sound field by using a piezoelectric transducer array; and the feedback evaluation module passes back measurement data through laser vibration measurement and a microphone array to realize closed-loop correction of control parameters. The method has the advantages that high-precision sound wave modeling, intelligent control parameter optimization and dynamic self-adaptive adjustment capacity are achieved, and the real-time performance, stability and the like of sound field control in the multi-medium environment are improved.

The invention discloses a vibration measurement information enhancement method based on fusion data, and relates to the technical field of vibration measurement information enhancement. Edge nodes splice reasoning probability, frozen layer activation statistics, weak spectrum gradient direction and frozen layer gradient variance to generate a multi-source confidence tensor, and a heat peak list is formed through adaptive time-frequency kernel mapping; the information is uploaded after being subjected to redundancy elimination screening; a central node distributes domain credibility to each domain and then constructs a global heat map by adopting self-attention weight fusion heat peaks, and links hierarchy, frequency bands, links and working condition nodes in a mechanism attribution map network to calculate a causal path; and an attribution result triggers a strategy rule engine to select a corresponding maintenance script or a network self-checking instruction, and the maintenance script or the network self-checking instruction is pushed to a monitoring large screen, a mobile terminal and a mail in a unified message packet format along with a global heat map and a reason link, so that display and explanation of weak fault abnormity and operation and maintenance instruction closed loop are completed.