60 results about "Mechanical wave" patented technology

The embodiment of the invention provides a power transformer fault identification method and device, equipment and a medium. The method comprises the following steps: acquiring a multi-source mechanical wave signal in an operating environment of the power transformer, and performing short-time Fourier transform on the multi-source mechanical wave signal to obtain a multi-channel time domain matrix in the same time domain; determining a comprehensive feature corresponding to the multi-channel time domain matrix based on a multi-level feature weighting strategy, and determining a global association feature of the multi-channel time domain matrix based on the comprehensive feature; determining a pseudo tag of the global association feature through a preset semi-supervised learning model, and determining a fault category tag corresponding to the global association feature based on the pseudo tag and a real tag of the global association feature; and determining a fault category corresponding to the power transformer based on the fault category label. The method is used for achieving the effects of improving the real-time performance, accuracy and robustness of power transformer fault identification in a complex environment, further improving the operation reliability of the power transformer and guaranteeing the safety of a power grid.

The present application relates to the technical field of power hardware processing and manufacturing, and particularly relates to a cross arm production process. The process comprises: after a fluid-incompressible pressure-maintaining rigid boundary is constructed by pressing a main hydraulic cylinder, starting a microseismic device to directionally inject high-frequency mechanical microseismic kinetic energy into the cross arm; synchronously extracting a back pressure feedback value in a sealed loop and monitoring a dynamic attenuation slope thereof in real time; when the slope is detected to be flat and to be in an attenuation stagnation of internal stress release, under a timing safety interlock protection mechanism for executing confirmation of mechanical wave calming, triggering a high-frequency electrically-controlled proportional overflow valve to execute millisecond-level transient micro-pressure relief and extremely fast pressure reconstruction, so as to provide a transient volume yielding space for metal lattice rearrangement; and finally completing final state confirmation when the absolute value of the back pressure is stabilized at a zero rebound threshold. The present application can solve or at least alleviate the secondary rebound problem caused by lattice distortion residual strain energy accumulation in the forming of thick-walled metal components, and improve the production quality of the cross arm.

The invention relates to a temporomandibular joint vibration mechanical wave collection and recognition method, and belongs to the technical field of medical instruments.The temporomandibular joint vibration mechanical wave collection and recognition method comprises the steps that a sensor assembly collects a vibration mechanical wave signal to generate a simulation piezoelectric signal; the analog piezoelectric signals are converted into digital piezoelectric signals through signal amplification and analog-to-digital conversion, feature extraction is conducted on the digital piezoelectric signals to obtain feature parameters of the digital piezoelectric signals, the feature parameters are input into a trained random forest model, and a recognition result about whether the temporomandibular joint vibration mechanical waves are abnormal or not is obtained. The problem that in the prior art, the temporomandibular joint vibration mechanical wave recognition effect is not ideal is solved.

1. The name of the design product: voiceprint camera support. 2. The use of the design product: used for installation on the back of the robot, used in the substation, through the high-sensitivity microphone array to capture the mechanical wave and electromagnetic noise when the equipment is running, and then use the AI algorithm to convert these sound waves into a spectrum diagram to identify the fault characteristic frequency. 3. The design points of the design product: in the shape of the product. 4. The picture or photo that best indicates the design points: perspective view 1.

The utility model discloses a kind of magnetic field generator based on mechanical wave, it is related to electromagnetic induction technical field, the utility model is by being arranged between ultrasonic wave transmitting unit and magnet cantilever beam of strip structure, when ultrasonic wave transmitting unit sends ultrasonic wave, when the frequency of ultrasonic wave and the natural frequency of cantilever beam match consistent, cantilever beam will appear resonance phenomenon with ultrasonic wave, it can be based on the resonance enhancement characteristics of cantilever beam, in the divergent space surrounded by cantilever beam, the amplitude of ultrasonic wave is caused to increase, to drive magnet substantially moves, produce the alternating magnetic field of higher magnetic field intensity, it can be widely applied in ultrasonic wave transducer and many other fields.

The application discloses a tunnel boring machine space dynamic compensation seismic wave advanced detection method and system, comprising: receiving the reflection echo data of the current space position; compensating the reflection echo data according to the attenuation compensation factor of the current space position, wherein the attenuation compensation factor of the current space position is obtained by a trained neural network, and the prediction process comprises: after curve fitting of the attenuation compensation factor of the reflection echo data of the detected space position, the attenuation compensation factor of the next space position is predicted by using the trained neural network; the compensated reflection echo data is subjected to geological body imaging by using the equal travel time imaging method, and the geological body detection result is obtained according to the amplitude difference on the imaging profile. The space dynamic compensation algorithm of the mechanical wave attenuation is used to adaptively correct the attenuation compensation factor at the next tunneling surface, so as to compensate the received reflection echo data and enhance the identification ability of the reflection echo.

A method for localizing a mobile device in relation to a vehicle, comprising the following steps: generating a modulated signal from a carrier wave and a baseband signal, wherein the modulated signal is a mechanical wave, the carrier wave has an average carrier frequency, and the baseband signal has an average baseband frequency that is lower than the average carrier frequency; causing the modulated signal to be transmitted by at least two loudspeakers located on the vehicle, wherein the at least two loudspeakers are spaced apart by less than half the wavelength of the average baseband frequency; causing the modulated signal transmitted by the loudspeakers to be received by one or more microphones located on the mobile device via a plurality of localization paths;Demodulating the modulated signal received at the microphone(s) for each of the multiple localization paths to obtain a multiple of demodulated signals; and processing the multiple of demodulated signals to determine the location of the mobile device in relation to the vehicle.

The present application relates to the technical field of cable fault diagnosis, in particular to a data early warning method and system for marine cable fault, comprising obtaining load voltage, current, real-time torque, winding layer number and acoustic-electric signal of the drum cable in operation; using load current phase to analyze partial discharge distribution, combining mechanical wave cycle to synchronously align acoustic emission signal, constructing dynamic acoustic-electric-force composite feature matrix; then using Euler-Savari formula combined with layer number to solve radial extrusion force, constructing spatial topology graph and mapping electric parameters; obtaining theoretical insulation loss prediction value through coding layer and regression prediction layer; finally extracting loss deviation and discharge frequency deviation as double residual error, inputting Bayesian decision model to output fault warning level. The present application realizes accurate early warning under dynamic working condition through multi-physical field feature fusion.

The present application relates to the technical field of discharge monitoring and early warning, in particular to a local discharge real-time monitoring and early warning system based on multi-source data fusion, in the present application, a mixed transient signal stream is classified by a signal physical separation module to separate pure electromagnetic wave speed type and mechanical wave speed type signal sources; a feature marking module extracts feature points with a unified time reference and marks physical property categories; a dual-path credibility fusion module performs time difference logical verification on the two types of feature points, and only when the electromagnetic wave verification result and the mechanical wave verification result are both logical value 1, a credible discharge event is marked, and an event confidence parameter is generated through dynamic confidence fusion to realize physical interlocking verification and unique locking; an anti-interference response module dynamically adjusts a response threshold based on the event confidence parameter, and only triggers a targeted response to a threat whose physical nature is confirmed as a real discharge and whose confidence meets the standard; the present application solves the problem of distinguishing real discharge events from multi-source interference and reliably identifies real discharge events.

This invention relates to the field of wind turbine structural health monitoring, and discloses an adaptive monitoring method for the attitude of hybrid-tower wind turbines based on operational status feedback. The method includes: synchronously acquiring the wind turbine operational data stream and the original tower attitude monitoring signal; determining the transient aerodynamic thrust based on the operational data stream, and using this thrust to determine the dynamic propagation velocity of the mechanical excitation wave generated by the stress stiffening effect; determining the propagation delay based on the dynamic propagation velocity, and performing a reverse time shift on the monitoring signal to achieve time-domain synchronization; reducing the feedback weight of the measurement update link of the solution model under the unit's operational adjustment state, and outputting the tower attitude data. This invention establishes a mapping relationship between aerodynamic loads and mechanical wave propagation characteristics, achieving precise decoupling between the unit's operational excitation and the tower's actual response, eliminating monitoring data distortion caused by spatiotemporal misalignment, and improving the reliability of safety monitoring for large-megawatt units.

The present invention relates to systems for identifying one or more ions in a liquid solution, including a solid surface configured to be in contact with the liquid solution; a mechanical wave generator configured to be in contact with the solid surface and / or with the liquid solution; and a working microelectrode configured to be positioned in the liquid solution in close proximity to the solid surface without contacting it. Methods of the invention include generating a mechanical wave which propagates and excites ions of an electrical double layer (EDL) formed at an interface between the solid surface and the liquid solution, thereby causing the EDL to vibrate and to leak an electrical field. The electrode measures electrical potential of the electrical field over time, which yields a voltage spectrum comprising amplitude and phase which are indicative of an identity and a concentration of the one or more ions in the liquid solution.

The invention relates to the technical field of wire cutting, in particular to a carborundum composite nickel deposition process and a diamond wire, and the carborundum composite nickel deposition process comprises the steps of bus cleaning, bus pretreatment, bus pre-nickel plating, bus sanding, secondary nickel plating, cleaning, heat treatment and the like. Ultrasonic powder in the electroplating liquid can be uniformly dispersed in the suspension liquid through ultrasonic oscillation, and then the ultrasonic powder is deposited on the bus along with metal ions. High-frequency mechanical waves generated by ultrasonic oscillation can enable particles and bubbles in the liquid to generate violent mechanical oscillation, so that the effects of stirring, dispersing and mixing are achieved; in the carborundum deposition process, carborundum powder can make full contact with the bus through ultrasonic waves, and meanwhile diffusion of metal ions in electrolyte and uniformity of metal deposition are promoted.

The invention discloses a method and system for monitoring the health state of a battery in a lithium battery energy storage cabinet, and the method comprises the steps: S1, obtaining a mechanical wave of the energy storage cabinet through a waveguide rod, and converting the mechanical wave into an electric signal to form a monitoring channel; s2, acquiring signals of a plurality of monitoring channels and processing the signals; and S3, obtaining an abnormal segment of each monitoring channel, screening out homologous abnormal signals, then identifying the starting time of the abnormal signals, and identifying the specific position of the faulty single battery. Acoustic emission signals generated by the battery in the system module are efficiently transmitted out of the system through the independently invented waveguide rod, the sensor is installed in a safe area outside the module, the problems that the sensor is difficult to arrange, insulation is safe and cost is high are solved, and accurate positioning, online monitoring and early warning of early faults of the lithium battery are achieved.

A microphone includes a housing unit, a capsule unit mounted on the housing unit, a noise-counteracting unit electrically connected to the capsule unit with opposite electrical polarity, and a damping unit connected to the housing unit. The capsule unit generates a primary electrical signal composed of a primary signal part attributed to an acoustic wave and a secondary signal part attributed to a first mechanical wave which is generated due to vibration of the housing. The noise-counteracting unit generates a secondary electrical signal attributed to the first mechanical wave and having an electrical polarity opposite to that of the primary electrical signal, so that the secondary electrical signal may counteract the secondary signal part of primary electrical signal. The damping unit generates a second mechanical wave to counteract the first mechanical wave when the first and second mechanical waves are transmitted to the capsule unit.

The application discloses a brain regulation device, an electronic device, a medium and a computer program product. The device comprises a control module, a mechanical wave emitting module and a magnetic field generating module. The control module is configured to determine a first intensity and a second intensity corresponding to a regulation area of a target object based on an effective induced electric field intensity of the target object. The mechanical wave emitting module is configured to emit mechanical waves with the first intensity to the regulation area. The magnetic field generating module is configured to generate a magnetic field with the second intensity in the regulation area. The embodiments of the application are beneficial to improving the non-invasive neural regulation effect on patients.

This invention relates to the field of wave energy generation technology, proposing a mechanical wave energy conversion system installed between two floating bodies. The system includes a main shaft, a first driven gear shaft, and a second driven gear shaft. A driving gear, a first driven gear, and a second driven gear are respectively mounted on the main shaft, the first driven gear shaft, and the second driven gear shaft. A ratchet transmission mechanism is also mounted on the main shaft and connected to the first floating body. The second driven gear shaft is mounted on the second floating body, and the first driven gear shaft is hinged to the second driven gear shaft via a bracket. The driving gear meshes sequentially with the first driven gear and the second driven gear. The ratchet transmission mechanism is also provided on the main shaft. This invention features a simple, compact structure, small size, and light weight, and also exhibits low energy loss and high conversion efficiency. Compared to pneumatic and hydraulic energy conversion systems, it has significant advantages in reliability, efficiency, and cost.

High-frequency mechanical wave measurement apparatus. This apparatus comprises: - a demultiplexer (52) capable of extracting optical signals reflected by measurement Bragg gratings, this demultiplexer comprising for this purpose a series of bandpass filters (Fpi) in which each bandpass filter (Fpi) is associated with a respective measurement Bragg grating (Bmi), each of these bandpass filters having a bandwidth centered on a central wavelength and the width of this bandwidth being greater than the reflection range of the measurement Bragg grating to which it is associated, and - a servo device (130) capable of varying the central wavelength of each bandpass filter (Fpi) to cancel variations in the DC component of the optical signal reflected by the measurement Bragg grating to which it is associated. Fig. 3

Disclosed are a vehicle scraping protection method and apparatus, an electronic device, an intelligent vehicle and a storage medium. The vehicle scraping protection method comprises: acquiring a mechanical wave vibration intensity of a target position of a target vehicle (S101), the target position corresponding to the mounting position of a battery pack of the target vehicle; determining a current collision intensity of the battery pack on the basis of the mechanical wave vibration intensity of the target position (S102); acquiring a current load of the battery pack (S103); and, on the basis of the current collision intensity and the current load, using a corresponding preset protection measure to protect the target vehicle (S104).

The embodiment of the invention provides an obstacle recognition method and device, a vehicle and a storage medium, the obstacle recognition method and device are applied to the vehicle, the vehicle is provided with an ultra wide band (UWB) anchor point supporting a radar function, the UWB anchor point communicates with a parking auxiliary controller through a controller area network (CANFD) bus, and the method comprises the steps that electromagnetic wave detection is carried out through the UWB anchor point, obstacle information of the obstacle target is obtained; and the obstacle information is sent to the parking auxiliary controller through the CANFD bus, so that the parking auxiliary controller obtains an obstacle recognition result based on the obstacle information. A UPA probe is replaced by a UWB anchor point supporting a radar function, mechanical wave detection of the UPA probe is changed into electromagnetic wave detection of the UWB anchor point, obstacle information recognized by the parking auxiliary controller is sent to the parking auxiliary controller through a CANFD bus, and the problem that the appearance of the UPA probe is perforated during ultrasonic detection is effectively solved.

The application discloses a system and method for coal grading refining and atomic recombination for high-end material, and belongs to the field of coal clean conversion and advanced material manufacturing. The method first converts coal into light aromatic hydrocarbons and a standardized active refined residual carbon with a specific hydrogen-carbon ratio and microstructure under mild conditions through the synergistic effect of high-frequency electromagnetic field, mechanical wave field and strong centrifugal force field. Then, the residual carbon is mixed with self-produced hydrogen-rich gas and activated and decomposed into active carbon species in plasma. Finally, the active species are directionally synthesized into preset high-end materials in a programmable multi-physical field environment. The system correspondingly comprises a hydrogenation refining unit, an activation and decomposition unit, a directional synthesis unit and an intelligent control unit. The application solves the world-wide problem of high energy consumption and poor selectivity in directly synthesizing materials from complex coal through atomicization by creatively preparing a standardized active precursor and realizing deep coupling of two-stage processes, and realizes high-value and materialized utilization of coal resources with almost zero emission.

The application relates to the metallurgical technical field and discloses a billet internal homogenization control method based on accurate regulation of a solidification end, which comprises the following steps: acquiring a physical boundary signal configuration two-dimensional solidification heat transfer model of a continuous casting machine, calculating a theoretical prediction shell thickness and a standard wave conduction time; injecting a multi-frequency orthogonal micro-disturbance kinetic instruction into a target detection defense zone, extracting an actual solidification shell thickness value and a low-frequency mechanical wave phase delay time; performing difference calculation on the actual value and the theoretical prediction value, acquiring a roll gap dynamic compensation amount based on the calculation result; updating a press-down parameter according to the compensation amount and converting the press-down parameter into a driving voltage to drive a hydraulic cylinder to perform a mechanical pressing action. The application realizes the following effects: the measured internal physical solidification state is converted into a roll gap dynamic compensation amount and a heat transfer model is closed-loop corrected, the mechanical press-down position follows the actual solidification end, the center segregation and shrinkage hole defects caused by external working condition fluctuations can be eliminated, and the internal homogenization quality of the continuous casting billet is improved.

The invention discloses a Kringing metamaterial band gap regulation and control device based on modal steering, and belongs to the technical field of elastic metamaterials and fluctuation control of the elastic metamaterials. The device is formed by periodically connecting a plurality of Kreshing structural units in the one-dimensional direction, and each Kreshing structural unit comprises a regular N-polygon rigid panel, a regular N-polygon perforated base welded with N groups of hydraulic driving rods, and elastic connecting pieces arranged along the circumference. The expansion amount of a hydraulic driving rod is synchronously adjusted, unit geometric parameters are changed, modal deflection behaviors of a longitudinal vibration dominant mode and a torsional vibration dominant mode are excited, and active adjustment and control of an elastic wave band gap are achieved; and the hydraulic rod retracts to enable the device to recover the initial band gap characteristic. The device does not need a complex external field or overall large deformation, can realize continuous and reversible regulation and control of the band gap, is fast in response and good in robustness, and can be applied to the fields of navigation intelligent vibration reduction and sound insulation, precise instrument vibration isolation and mechanical wave information processing.

The application discloses a kind of concrete crack intelligent identification and measurement system, it is related to concrete structure health monitoring technical field, comprising: data acquisition module: in the position of concrete structure surface excitation mechanical wave, make mechanical wave spread to concrete interior, several piezoelectric film sensors are laid out on the surface of concrete, receive the waveform signal of mechanical wave after passing through concrete, obtain mechanical wave arrival time data set, several infrared imaging units are laid out on the surface of concrete, obtain the transient infrared radiation distribution data of concrete structure surface in the process of mechanical wave propagation, form heat field disturbance data set.The crack target area determined after spatial matching of mechanical anomaly and thermal anomaly has the abnormal characteristics of two physical fields, effectively avoids the misjudgment caused by environmental interference of single detection means, reduces the false positive rate of detection result.

A living occupant left-behind detection method, apparatus and system, and a storage medium. The method comprises: (1) when a vehicle satisfies preset detection conditions, waking up preset detection apparatuses inside the vehicle, and performing combined optical and mechanical wave detection on a living occupant inside the vehicle; and (2) when a target living occupant is detected in the vehicle, controlling the vehicle to perform a living occupant left-behind alert.

The embodiment of the invention provides a sound field processing method and device based on AI dynamic modeling and an adaptive acoustic structure, and the method comprises the steps: collecting sound wave data of multi-frequency mechanical waves in a target space, carrying out the analysis and modeling of the sound wave data through a deep learning algorithm, and obtaining a three-dimensional distribution model, the sound wave data comprises reflection data and attenuation data; obtaining frequency domain and time domain features and space material features in the three-dimensional distribution model, and performing feature fusion on the frequency domain and time domain features and the space material features to obtain fusion features; and performing defect classification on the fusion features to obtain a target region frequency band, and performing sound wave compensation and sound absorption structure adjustment on the target region frequency band. According to the method, the sound field is accurately controlled, the sound definition is improved, and a comfortable auditory effect and an immersion sound field are created for a user.

The invention provides an ultrasonic transducer shell wave suppression structure based on a boundary state wave barrier. The ultrasonic transducer shell wave suppression structure comprises a transducer shell and a boundary state regulation and control structure arranged in a boundary area of the transducer shell. The boundary state regulation and control structure localizes state or energy distribution by changing the propagation path of mechanical waves or ultrasonic stray waves propagating along the transducer shell so as to restrain coupling output of multidirectional propagation waves, boundary reflection waves or trailing related waves in the detection direction. The ultrasonic transducer shell has the advantages of being remarkable in wave suppression effect, convenient to integrate with an existing transducer shell, high in engineering applicability and the like, and is suitable for nondestructive testing, structural health monitoring and other ultrasonic application scenes.

The invention relates to the technical field of nondestructive testing, and discloses a multi-mode mechanical wave optimal mode selection method, system, equipment and medium for buried component detection, and the method comprises the steps: building a buried component cylindrical waveguide model based on an elastodynamic theory, solving the frequency dispersion characteristic of a multi-mode mechanical wave, and calculating the optimal mode of the buried component; calculating to obtain a frequency dispersion curve and a modal feature vector of the mechanical wave propagating in the waveguide; setting a defect boundary and obtaining defect parameters, and calculating to obtain a boundary reflection coefficient; analyzing the distribution proportion of the energy of each mode in the axial direction and the radial direction, and analyzing the vibration energy distribution of each mode; and based on the boundary reflection coefficient and the vibration energy distribution, screening the optimal mode of the mechanical wave. According to the method, the boundary reflection coefficient for quantitatively evaluating the modal sensitivity is provided, blindness of traditional experience selection is avoided, and the signal-to-noise ratio of a detection signal and the intensity of defect echoes are remarkably improved by selecting the optimal modal with the high boundary reflection coefficient and low attenuation.

The application provides a bone conduction loudspeaker with adjustable sensitivity, which comprises a panel installed on the upper part of a transmission plate, used for transmitting mechanical waves to the muscle tissue of a hearing-impaired patient; the transmission plate is installed on the upper part of a vibrating plate, used for transmitting the mechanical waves generated by the vibrating plate to the panel; the vibrating plate is installed on the upper part of a voice coil, used for transmitting the mechanical waves generated by the voice coil to the transmission plate; a voice coil slot plate is installed on the lower part of the voice coil, used for inserting the coil; a coil group is inserted into the voice coil slot plate, used for generating ampere force after being electrified and adjusting the sensitivity of the voice coil vibration; external wires are used for providing current for the coil group; a gasket is installed between the transmission plate and a first magnet guide, used for connecting the vibration system and the magnetic system; a plurality of magnet guides and magnets are connected with each other and are used for forming a magnetic field. The application improves the use flexibility of the bone conduction loudspeaker.

Disclosed are an ultrasound imaging device and a quantitative evaluation method for myocardial biomechanical properties. By means of processing cardiac ultrasonic echo data, at least one of an intercept of a dispersion curve of a mechanical wave, a slope of the dispersion curve, an elastic modulus, a viscous modulus, an anisotropy parameter, a coupling parameter between a second evaluation parameter and a preload, and a coupling parameter between the second evaluation parameter and an afterload can be obtained. These parameters can evaluate myocardial biomechanical properties of the heart from different dimensions, thereby facilitating a doctor to quantitatively evaluate the myocardium.

The invention discloses an anchor rod detection cycle signal processing method, system and device and a medium, and belongs to the technical field of electric power anchor rod detection.The method comprises the steps that a head interval and a tail interval are recognized according to a three-step positioning method, signals in the head interval and the tail interval are subjected to three-level optimization processing, and the effective head interval and the effective tail interval in multi-mode mechanical wave cycle signals are recognized; the problems of signal-to-noise ratio reduction and corrosion characteristic distortion caused by the fact that effective and invalid intervals are not distinguished in a traditional method are solved; and meanwhile, a three-stage optimization treatment flow of boundary reflected wave separation, self-adaptive noise reduction and feature enhancement is adopted, so that interference of head boundary reflected waves is effectively separated, corrosion defect features are highlighted, accurate positioning of the corrosion position of the buried anchor rod and reliable evaluation of the corrosion state are realized, and the efficiency and the accuracy of non-excavation detection are improved.