1176 results about "Vibration source" patented technology

The invention discloses a building construction site safety monitoring management system and method, and relates to the technical field of building construction, the method adopts a calculation model of a multi-source vibration comprehensive influence index (MVTI), a foundation pit stress distribution value (GSF) and a foundation pit stability coefficient (GSC), and multidimensional data is extracted through an embedded database for real-time analysis. The influence of different vibration sources on the stability of the foundation pit can be comprehensively evaluated based on dynamic calculation of a multi-source vibration comprehensive influence index MVTI; meanwhile, the stress distribution of vibration to a foundation soil body is refined through the foundation pit stress distribution value GSF; the foundation pit stability coefficient GSC serves as a core index and is used for comprehensively analyzing the stability state of the foundation pit. When a foundation pit stability coefficient GSC value is lower than a safety threshold value, the system generates first early warning information, calculates a monitoring point risk value RIM in combination with a multi-source vibration comprehensive influence index MVTI, and locates an abnormal area through the monitoring point risk value RIM.

According to the floating slab ballast bed sealing strip defect detection method and system based on the multi-modal data, efficient and accurate detection of floating slab ballast bed sealing strip defects is achieved through a multi-modal data fusion technology. The system integrates a linear array camera, an acceleration sensor, a pressure sensor and a controllable vibration source, a multi-dimensional data acquisition system is constructed, and the limitation of a single detection means is effectively overcome. Through collaborative analysis of image data and vibration and pressure data, the accuracy and robustness of defect recognition are remarkably improved. According to the defect evaluation model based on the CNN-LSTM hybrid architecture, implicit features in multi-modal data can be deeply mined, and the defect confidence is accurately quantified. Meanwhile, by combining the preset characteristic parameter threshold value and the classification model, intelligent classification of the deformation defect and the foreign matter defect is realized, and a clear basis is provided for subsequent maintenance.

The invention discloses a frequency converter performance detection device, and relates to the technical field of frequency converters, the frequency converter performance detection device comprises a detection box, a heat-conducting fin is arranged in the detection box, and the heat-conducting fin is of a four-side square structure and forms a sealed cold and hot channel on the edge of an inner cavity of the detection box; the multiple damping shock absorbers are arranged at the bottom of the detection box; the vibration generator is arranged at the lower part of the detection box and is used for providing a vibration source for the detection box; the output end of the humidifier is communicated with the inner cavity of the detection box; and the output end of the cold-hot generator communicates with the cold-hot channel. The vibration generator, the humidifier and the cold and heat generator are arranged, the detection box is matched, multifunctional simulation of vibration, high-humidity, high-temperature and low-temperature environments in the peripheral environment is achieved, stability detection of the frequency converter under the extreme environment is achieved, and the cold and heat channel in a circulating circulation state is formed in the inner edge of the detection box; cold and hot air covers the detection box for multi-surface circulation, so that the distribution uniformity of the cold and hot air is improved.

The invention discloses a signal reconstruction denoising method for circuit breaker mechanical state evaluation and a storage medium. In order to solve the problems of multi-source signal aliasing and strong noise interference of the double-break vacuum circuit breaker, a technical route combining mechanical transfer function modeling and a double-flow deep network is innovatively adopted. A complex vibration source is analyzed by constructing a signal coupling model, environmental noise is accurately filtered by using a multi-stage noise reduction strategy, and a multi-dimensional state vector is constructed by fusing time-frequency domain features, so that accurate evaluation of the health state of the equipment is realized. Experiments show that the method is remarkably superior to the prior art in signal denoising, feature extraction precision and diagnosis accuracy, and an efficient solution is provided for intelligent operation and maintenance of power equipment.

Provided is a single degree of freedom vibration isolator / damper system capable of overload protection. The vibration isolator reduces vibration transmitted to or from an isolated spacecraft component that generates micro-vibrations. The system isolates sensitive components and vibration sources from the spacecraft. The system may consist of a 1) first spring element in series with a first damper element; 2) a second spring element in parallel with the first spring element and first damper element; and 3) a support member that serves as the overload protection device.

The invention relates to the technical field of production line monitoring control, in particular to a monitoring control method and system for an automatic production line. According to the technical scheme, the pulse laser is transmitted to the monitoring optical cable of the battery production line, and the feedback scattering signal is received; performing time-frequency analysis, space-time array analysis and frequency-domain space array analysis on the scattered signals to obtain multi-dimensional vibration information of each operation device of the battery production line; the multi-dimensional vibration information comprises the vibration main frequency of the operation equipment and the vibration source position and the energy spectrum density of the bearing area to which the operation equipment belongs, so that the actual operation state of each operation equipment during execution of the current production task can be determined based on the multi-dimensional vibration information of each operation equipment and the progress information of the corresponding production task; and performing interlocking operation control on the production takt of the battery production line according to the actual operation state of each operation device. According to the technical scheme, the stability of production control of a battery production line and the consistency of battery product quality are improved.

The invention discloses a pump set vibration monitoring method and system based on distributed sensing. The method comprises the steps that vibration collection signals and real-time working condition parameters of distributed sensing nodes are obtained, multi-node clock synchronization correction is executed, and synchronous vibration data frames are formed; time-frequency feature extraction is carried out on the multi-channel vibration data set, abnormal channels are identified through inter-channel consistency analysis, a local fault correlation frequency band is extracted, and a vibration feature vector is constructed; associating the vibration feature vector with a real-time working condition parameter to form a working condition-feature mapping table, identifying a feature mutation rotating speed point for the feature baseline, adaptively dividing a rotating speed interval to generate an adaptive working condition threshold value, and implementing out-of-limit detection to generate an abnormal trigger identifier; determining a traceability analysis window based on the abnormal trigger identifier, and executing multi-measuring-point coherence calculation and energy attenuation gradient analysis to construct an energy transfer link diagram; and finally, vibration source position positioning is performed to form fault source probability distribution, a fault mode label is matched, pump set vibration monitoring is completed, and quantitative positioning of a fault source is realized.

The invention discloses a system for enhancing the damping and aseismic capacities of an underground integrated pipe rack. It includes a pipe fixing assembly installed on the inner walls of the underground space on both sides. The assembly comprises multiple lifting frames arranged vertically and a lifting mechanism. The telescopic end of the lifting mechanism is fixedly connected to the lowermost lifting frame. One side of the lifting frame is slidingly connected to the inner wall of the underground space and features a recess for placing the pipe. A pipe holder inside the recess secures the pipe. During vibrations, the lifting frame slides on the inner wall, causing relative movement between adjacent pipe holders. The vibration is absorbed by the telescopic spring, preventing hard contact between the pipe and the vibration source. This reduces vibration and protects the pipe, thereby enhancing the aseismic capacity of the underground pipe rack.

The invention belongs to the technical field of signal processing, and more specifically relates to an intrusion monitoring identification and event positioning device and method based on a DAS system. According to the invention, mode identification and accurate positioning are carried out on various vibration sources around by using sensing optical cables laid in a large range based on an optical fiber distributed sound wave vibration sensing technology. According to the method, respective advantages of a direct detection method and a coherent detection method are exerted, the vibration position can be quickly demodulated by using the direct detection method, the dynamic process of vibration change can be obtained by using a digital coherent method, and then vibration event identification is realized. The method has the advantages of being wide in monitoring area range, high in recognition accuracy, high in real-time performance, high in stability and the like.

The invention provides an adjustable damping capsule vibration isolation system based on electrorheological fluid, and belongs to the field of vibration isolation devices.The adjustable damping capsule vibration isolation system comprises a vibration isolation capsule, the vibration isolation capsule is filled with the electrorheological fluid, and the electrorheological fluid comprises solid particles; a pneumatic pump; a conduit; at least part of solid particles in the electrorheological fluid move to the guide pipe under the action of gravity; the pneumatic pump is configured to pump gas into the guide pipe based on the target gas flow so as to convey a target number of solid particles in the guide pipe into the vibration isolation bag body to change the concentration of the solid particles in the electrorheological fluid, and the electrorheological fluid is configured to perform vibration isolation treatment on elastic waves of the vibration source by using an electrorheological effect based on the concentration of the solid particles.

The invention relates to the technical field of signal data processing, in particular to an intelligent detection method and system for deformation of a deep foundation pit of a pipe gallery, and the method comprises the steps: collecting a vibration signal and an IMF component signal in each short-time window; acquiring a vibration propagation sequence and a first-stage signal corresponding to each IMF; according to the similarity between the IMF component signals and the corresponding vibration signals, a first-stage correction coefficient is obtained by combining the similarity between the first-stage signals corresponding to the adjacent IMFs; obtaining a second-stage signal and a second-stage correction coefficient corresponding to each IMF according to the vibration propagation sequence and the IMF component signal; signals in the vibration propagation sequence are corrected, and a vibration source signal segment corresponding to each monitoring point is obtained according to a correction result and the similar situation of each vibration signal between IMF component signals in each short-time window; and obtaining a deformation monitoring result of the pipe gallery deep foundation pit. According to the invention, accurate separation and positioning of the independent vibration source are realized.

The invention discloses a mechanical arm regulation and control multi-sensor array underground structure detection system and detection method based on reinforcement learning, a vibration source module provides a sweep frequency vibration signal, a multi-sensor array collects a reflected signal, a data processing module receives and processes the reflected signal, and the data processing module receives and processes the reflected signal; the imaging module generates a three-dimensional underground structure image through a wave velocity inversion and reverse time migration imaging technology, the intelligent optimization and adaptive adjustment module adaptively adjusts vibration source signal parameters and sensor array layout through a reinforcement learning algorithm, and the display terminal displays detection data and imaging results in real time and provides parameter optimization suggestions. According to the invention, real-time and automatic adjustment of vibration source signals and sensor layout is realized through an intelligent optimization and adaptive adjustment module constructed through a reinforcement learning algorithm, and a high-resolution underground structure three-dimensional image is generated accordingly. And an efficient and accurate underground structure identification and positioning scheme can be provided.

A heat pump dryer includes a cabinet, a drum rotatably supported within the cabinet, a heat pump including a condenser and an evaporator that are arranged in fluid communication with each other and a floating base plate that is dynamically supported within the cabinet such that the floating base plate is permitted to oscillate relative to the cabinet. The vibration source and at least one of the evaporator and the condenser are mounted on the floating base plate such that operation of the vibration source causes the at least one of the evaporator and the condenser to vibrate and shake water condensate and debris from the at least one of the evaporator and the condenser for improved heat pump circuit efficiency.

The invention relates to the technical field of vibration signal processing, in particular to a coupling vibration information source separation method based on blind source separation. The method comprises the following steps: processing an obtained multi-channel signal based on local value decomposition and adaptive singular value decomposition, and estimating the number of vibration sources in the signal to obtain the number of information sources; determining a blind source separation algorithm for multi-channel signal processing based on the number of channels and the number of information sources for signal acquisition, and if the blind source separation is underdetermined, decomposing and reconstructing the multi-channel signals, and converting the underdetermined blind source separation into positive determined blind source separation; separating the multi-channel signal or the reconstructed multi-channel signal by adopting rapid independent component analysis to obtain a vibration source estimation signal; and performing cross correlation calculation and gain compensation on the vibration source estimation signal, then performing signal processing on the vibration source estimation signal after gain compensation, setting a characteristic threshold to classify fault types, quantifying fault degrees, and calculating a fault score. According to the invention, the difficulty of underdetermined blind source separation is reduced.

The invention discloses a frequency converter maintenance test system with a protection function, which belongs to the technical field of frequency converter testing and comprises a detection seat, a simulation unit for simulating actual working conditions of a frequency conversion control panel is arranged on the detection seat, and a detection mechanism for detecting a diode in the frequency conversion control panel is further arranged on the detection seat. Through dynamic cooperation of the polarization assembly and the rotary simulation disc, the vibration direction of the vibration source can be flexibly adjusted, so that a multi-dimensional vibration scene possibly encountered in actual work of the frequency conversion control panel is covered, and the problem that vibration source simulation is lacked in a traditional frequency converter testing process is solved; an elastic supporting environment of actual installation is simulated through the air bag spring suspension, vibration energy emission distortion caused by rigid fixation is avoided, the accuracy of a large-capacitance vibration fatigue test is improved, automatic step-by-step wiring operation of detection is achieved through cooperation of the detection driving assembly and the universal test meter, and the overall detection wiring efficiency is improved.

An information processing device according to embodiments controls a vibration device including a plurality of vibrators and configured to apply vibration to a user in response to an input signal. The information processing device identifies a directional component of the object constituting a vibration source relative to the vibration device in input content and controls an amplitude and a delay of each of the vibrators, based on the directional component.

The invention provides a distributed optical fiber-based vibration source transverse distance determination method and system, and relates to the technical field of optical fiber sensing, and the method comprises the steps: collecting distributed optical fiber vibration signals, extracting features, constructing a multi-resolution scanning region, carrying out the traversal through employing a global optimization algorithm, and calculating the propagation speed of the vibration signals. According to the method, velocity field distribution characteristics based on Gaussian process regression are constructed, velocity field parameters are optimized in combination with a probability sampling optimization method, the transverse distance of a vibration source is accurately determined through discretization space traversal and anisotropy correction, and the precision and reliability of vibration source positioning are improved.

The invention provides a method and system for inverting metro train wheel out-of-smoothness through tunnel wall vibration source intensity data, and belongs to the technical field of accurate quantitative inversion of train wheel out-of-smoothness, and the method comprises the steps: obtaining actual measurement data of wheel out-of-smoothness, track irregularity and tunnel wall vibration source intensity; on the basis of the probability mapping relation between the out-of-roundness of the wheels and the source strength of the tunnel wall, actually measured source strength data of the tunnel wall are input into a model by utilizing a pre-trained probability machine learning model, so that probability statistics of the out-of-roundness of the train wheels is output, and accurate inversion of the out-of-roundness state of the wheels is realized. According to the method, random excitation of a wheel track system and a dynamic coupling mechanism of a vehicle-track-tunnel-stratum system are considered; meanwhile, wheel out-of-roundness probability statistics of a group of whole-line trains is quantitatively inverted by considering a probability mapping relation between wheel out-of-roundness excitation and tunnel wall source intensity response.

The invention relates to a robot multi-frequency vibration composite suppression method and system based on inertia disturbance analysis. The method comprises the steps of obtaining dynamic operation data in the operation process of a robot; the operation data are input into an inertia disturbance analysis module, and a low-frequency vibration source caused by a mechanical structure and a high-frequency vibration source caused by a driving system can be accurately recognized; a disturbance frequency distribution diagram is generated, according to the distribution diagram, a self-adaptive filtering algorithm is adopted to suppress a high-frequency vibration source, a compensation algorithm based on model prediction control is adopted to suppress a low-frequency vibration source, the two strategies are cooperatively processed to generate a comprehensive control instruction, the advantages of the two algorithms are fully played, and effective composite suppression of multi-frequency vibration is achieved.

The invention discloses a drilling and milling machining center for hardware product production, and relates to the technical field of mechanical equipment, the drilling and milling machining center comprises an initial adjustment assembly, the side end of the bottom of the initial adjustment assembly is fixedly connected with a bearing base, and the top of the bearing base is provided with an active shock absorption assembly; in the invention, under the cooperation of the active shock absorption assembly, the execution calibrator adjusts the frequency modulation pulse wave generator to generate corresponding phase and amplitude pulse wave signals according to the reverse signal, so that the phase and amplitude pulse wave signals counteract the vibration source signal, the vibration of the vibration source is actively counteracted, and weak vibration offset during processing is effectively avoided; the machining quality of hardware products is affected, the consistency of follow-up products is affected due to the fact that the variation which is difficult to perceive exists during drilling or cutting, under the cooperation of the machining synchronous regulation and control assembly, the machining angle can be actively adapted according to the position of the operation tool, and under the cooperation of the rotating disc rail, the machining requirements of different angles are met; and machining errors are reduced.

The invention provides an active and passive combined type universal vibration isolation base and a vibration suppression method.The vibration isolation base comprises a base shell, a friction wall face, a transverse buffering mechanism, a high-strength elastomer and an axial buffering mechanism, the bottom of the base shell is connected with a vibration source, the friction wall face is installed on the inner wall of the base shell, and the transverse buffering mechanism abuts against the inner wall of the friction wall face; the vibration isolation object is connected to the top of the transverse buffering mechanism, the upper portion of the high-strength elastomer is elastically connected with the bottom of the transverse buffering mechanism, the lower portion of the high-strength elastomer is elastically connected with the top of the axial buffering mechanism, and the bottom of the axial buffering mechanism is connected to the bottom of the base shell. The transverse buffering mechanism and the axial buffering mechanism form a passive damping mechanism, and a magneto-rheological body adjusting structure arranged on the transverse buffering mechanism and a friction damping adjusting structure arranged on the friction wall face form an active adjusting mechanism. Through a passive damping mechanism and an active adjusting mechanism, efficient isolation of full-band vibration and multi-direction vibration can be achieved.

A portable information handling system includes a touch function row between a keyboard and a display that accepts touches or proximity detection at plural locations to initiate an on-screen-display user interface for a selected of plural functions based upon a touch location. Haptic feedback to touch function row inputs is provided by a haptic device coupled directly to a bottom surface of the touch function row, such as with an adhesive. The haptic device couples to a housing cover portion with a brace that integrates a resilient member, such as a spring, to dampen vibration from a haptic vibration source to the housing cover portion.

The invention discloses a wind power generation bearing vibration anomaly detection device, and relates to the technical field of wind power generation bearing detection. An inner ring and an outer ring of a to-be-detected bearing are respectively fixed through a first bearing mechanism and a second bearing mechanism, and the inner ring and the outer ring of the to-be-detected bearing are respectively fixed through a first adjusting mechanism and a second adjusting mechanism; the detection end of the detection mechanism and the inner ring, the outer ring and the side face of the to-be-detected bearing are subjected to contact measurement respectively, multi-point measurement is achieved, the vibration condition of the bearing can be detected more comprehensively, the inner ring and the outer ring of the to-be-detected bearing rotate one by one and do not rotate one by one, and therefore vibration detection is conducted on the to-be-detected bearing in different rotating states. Therefore, the vibration signal generated by the independent rotation of the inner ring or the outer ring is separated, the position of the vibration source can be identified more accurately, and the detection result is more accurate.

The invention discloses a construction method of an assembly type vibration isolation trench. The method comprises the following steps: firstly, designing and prefabricating a vibration isolation trench unit according to construction site conditions, underground water flow and vibration isolation requirements, including site analysis, size material determination, simulation optimization and quality inspection; before construction, field survey is carried out, topography and geology are covered, underground pipeline detection and vibration source analysis are carried out, the excavation path and depth are determined, and field preparation is made. And then digging a trench by using special equipment according to the design, controlling trench wall parameters and carrying out acceptance inspection. And then gravel and an anti-seepage film are sequentially laid at the bottom of the groove, and a drainage facility is additionally arranged according to needs so as to install a vibration isolation layer. The prefabricated units are lifted, adjusted and connected, then light materials are filled, then fine sand and geotechnical cloth are covered, and soil is recovered. And finally, adjusting and optimizing according to a result through vibration and acoustic testing. According to the method, through multiple layers of vibration isolation materials, firm connecting pieces and strict testing, the vibration isolation effect and stability are remarkably improved, and an effective scheme is provided for engineering vibration isolation.

The invention provides a capsule vibration isolation system based on nanobubbles, and belongs to the field of vibration isolation devices. The capsule vibration isolation system based on the nanobubbles comprises a vibration isolation capsule, the vibration isolation capsule is filled with buffer liquid and solid particles, the nanobubbles are attached to the surfaces of at least part of the solid particles, and bubble attached particles are formed; wherein the bubble attachment particles are configured to collide under the action of elastic waves of the vibration source, so that nano bubbles on the surfaces of the bubble attachment particles are broken, and the bubble attachment particles generate internal energy based on collision friction and bubble breakage to increase energy dissipation of the elastic waves so as to perform vibration isolation treatment on the elastic waves of the vibration source; and the preparation device is configured to prepare the nano bubbles based on a target generation rate under the control of the far infrared control signal, and input the nano bubbles into the vibration isolation bag body through the lower surface of the vibration isolation bag body so as to change the concentration of the bubble attachment particles in the vibration isolation bag body.

The invention relates to the technical field of laser cladding repair, and provides a positioning and clamping system and method for repairing the surface of a large working roll of a steel mill based on laser cladding, a three-field coupling prediction model of a temperature field, a stress field and a displacement field is established, and a partial least squares regression algorithm is combined with a Kalman filter to realize multi-step prospective prediction. According to the predicted thermal deformation, self-adaptive compensation control is implemented through a three-layer cascade compensation mechanism composed of a hydraulic drive, a piezoelectric ceramic driver and a laser head adjusting mechanism. The system adopts a time domain, frequency domain and time-frequency domain joint analysis method to extract vibration characteristics, vibration types are classified and identified through a support vector machine, and an active-passive hybrid suppression strategy is adopted for different vibration sources. High-precision positioning and stable clamping of the large working roller in the laser cladding repairing process are achieved, and the thickness uniformity and the surface quality of a cladding layer are remarkably improved.

The invention discloses a pumped storage power station underground powerhouse structure vibration test and excitation load feedback analysis method comprising the following steps: S1, combining time domain and frequency domain analysis to extract vibration characteristics of each structure of a powerhouse; s2, calculating three types of vibration sources, namely contribution degrees of machinery, hydraulic power and electricity to structural vibration; s3, adopting a finite element numerical simulation method and combining field actual measurement data to perform unit excitation load feedback analysis; the technical problems that the contribution of various vibration sources to plant vibration cannot be accurately judged in the prior art, so that the design of vibration control measures is lack of pertinence, and the transformation effect cannot be accurately predicted when the plant structure is subjected to anti-vibration optimization and transformation are solved.

The invention provides a network card vibration detection method, device and equipment and a storage medium, and the method comprises the steps: deploying a plurality of groups of three-axis acceleration sensor arrays in different function regions of a network card, and collecting vibration data when the network card is not powered on; after the network card is powered on, the substrate management controller reads vibration data, vibration spectrum characteristics are extracted by using a time-frequency analysis method, and dangerous frequency components are identified in combination with server heat dissipation system characteristics and network card physical parameters; based on the vibration data and the danger frequency component, vibration source positioning and classification are carried out by combining electromagnetic characteristic changes before and after the network card is powered on, and a vibration threat level is determined; and selecting and executing corresponding protection measures according to the vibration source information and the real-time communication state of the network card. According to the method, the problems of a spectrum analysis blind area and vibration source recognition fuzziness are solved, and network card data and communication stability are effectively protected through targeted protection measures.

Provided are a lens unit including a vibration mechanism, capable of suppressing the vibration of wiring connecting a vibration source and a drive circuit substrate, a camera module, an imaging system, and a moving body.　The present invention comprises: a first housing 23 provided with a first lens 31; a lens barrel 22 provided with a lens positioned closer to an image side than the first lens and provided radially inward of the first housing; a second housing 24 disposed closer to the image side than the first housing and fitted to the first housing; a vibration mechanism 60 provided between the first housing and the lens barrel; and wiring 306 for applying a drive signal to the vibration source. The middle of the wiring is fixed to the second housing, and the wiring has an extra length part 307 not in contact with a member constituting the lens unit 20 when the wiring is vibrated by the vibration source.

The invention discloses a PCCP pipeline three-dimensional space positioning online monitoring system based on a distributed optical fiber sound field. The PCCP pipeline three-dimensional space positioning online monitoring system comprises a signal processing module, a DAS system, and a first optical cable, a second optical cable and a third optical cable which are distributed and installed on the inner wall of a PCCP pipeline. The average refractive indexes of the first optical cable, the second optical cable and the third optical cable are consistent, and the phase difference between every two optical cables is 120 degrees; the DAS demodulates to obtain a sound wave signal transmitted by a pipe wall, water or air; the signal processing module obtains a vibration source type according to vibration signal feature analysis, and calculates a longitudinal position of a vibration source based on arrival time of sound wave signals propagated in various paths; and calculating the section position of the vibration source according to the arrival time of the vibration signal transmitted by the pipe wall and received by the optical cable and the section position of the optical cable. According to the method, external invasion and wire breakage of the PCCP can be monitored in real time, and the positions of the external invasion and the wire breakage can be accurately positioned.