47 results about "Infrasonic waves" patented technology

The invention discloses a multi-parameter fusion dangerous rock mass instability precursor identification method, which comprises the following steps: S1, generating a thermodynamic diagram of dangerous rock mass crack distribution, dividing each sub-region and setting each risk level; constructing a monitoring network; s2, performing time alignment and space alignment on the monitoring data; s3, the GNN model calculates and outputs each instability probability of each monitoring node; and S4, generating a global risk thermodynamic diagram according to each instability probability, and performing graded early warning based on a preset probability threshold. According to the method, the unmanned aerial vehicle thermodynamic diagram is used for guiding sensor optimization deployment, multi-dimensional data such as deformation, osmotic pressure, COs and infrasonic waves are fused, the model for identifying the instability of the dangerous rock mass is constructed by using the GNN model, accurate calculation and graded early warning of the instability probability are achieved, and the identification accuracy and early warning real-time performance are remarkably improved.

The invention relates to the technical field of drainage pipeline detection, and discloses a drainage pipeline structural defect detection system and method, a medium and a product, a controller actively constructs and generates a coded infrasonic wave signal, and it is ensured that the signal has stable frequency and amplitude characteristics; the infrasonic sound production module performs infrasonic wave emission and processing by using a coded infrasonic wave signal, and enables a low-frequency mechanical vibration signal to be stably propagated along a pipe wall, so that energy attenuation is reduced, and a long-distance pipe section which is difficult to touch in traditional passive detection is covered; the infrasound signal receiving module is used for detecting low-frequency mechanical vibration signals and converting analog signals into initial digital signals, and interference and distortion in the transmission process are reduced. Furthermore, by combining a Fourier transform method and a correlation coefficient analysis method, the problem of high misjudgment rate of a traditional single algorithm is avoided, accurate recognition of the structural defects of the pipeline is ensured, and the requirement for accuracy of structural defect detection of the drainage pipeline under complex working conditions is met.

The invention relates to a pneumatic membrane structure fluid-structure interaction multi-physics field synchronous test method, which relates to the technical field of vibration measurement, and comprises the following steps: conformally embedding a flexible capacitive sensor array in the surface of a pneumatic membrane structure, detecting mechanical vibration, ultrasonic wave, sound wave or infrasonic wave displacement through capacitance value change (electrical characteristics), and measuring the displacement of the flexible capacitive sensor array; and the capacitance value change rate delta C / C and the displacement delta x are in a linear proportional relationship. According to the pneumatic membrane structure fluid-solid coupling multi-physics field synchronous test method, a flexible capacitive sensor array is conformally embedded in the surface of a pneumatic membrane structure, and mechanical vibration, ultrasonic wave, sound wave or infrasonic wave displacement is directly detected by using capacitance value changes; wherein the linear proportional relation between the capacitance value change rate delta C / C and the displacement delta x is directly determined by the electrode distance and the dielectric constant of the capacitive sensor, so that the physical directness of vibration wave measurement is realized, the error caused by indirect calculation depending on a traditional strain gauge or an optical method is avoided, and the vibration wave displacement measurement precision is remarkably improved to + / -0.5% full scale.

The invention relates to the technical field of drainage pipe network management, and discloses a method and a device for checking hidden connection of branch pipes of a drainage pipe network based on active voiceprint conduction, and the method comprises the steps: receiving an infrasonic wave signal transmitted by an infrasonic wave source generator to a target pipe section of the drainage pipe network through an infrasonic wave sensor, and transmitting the infrasonic wave signal to an analyzer; and analyzing the infrasonic wave signals through an analyzer to obtain a checking result of the hidden connection of the branch pipes of the drainage pipe network. According to the invention, low-cost and high-efficiency troubleshooting of the branch pipe concealed connection problem is realized.

1. The name of the present design product: infrasonic stress monitoring instrument (BMEDCTOMISSMS). 2. The use of the present design product: equipment for monitoring the stress and strain generated by materials or structures under stress. 3. The design points of the present design product: in the combination of its overall shape and color. 4. The picture or photo that best indicates the design points: perspective view 1. 5. The design claimed contains color.

The embodiment of the application provides a novel capacitive infrasound sensor and an infrasound detection method, and belongs to the technical field of pipeline leakage detection. The novel capacitive infrasound sensor is characterized in that the novel capacitive infrasound sensor comprises: a detection cavity, which is connected with a pipeline to be detected through an acoustic sampling channel and is used for sensing infrasonic pressure pulsation caused by pipeline leakage; a reference cavity, which is connected with an external environment through a micropore array to form a pressure relief path with a preset time constant and is used for providing a stable reference pressure in a low frequency band; a capacitive sensing unit located between the detection cavity and the reference cavity, which is used for converting a differential pressure change between the detection cavity and the reference cavity into an electric signal; and a chopping demodulation circuit connected with the capacitive sensing unit, which is used for inhibiting low-frequency noise and DC drift in a demodulation process and obtaining a stable infrasound signal output. The scheme of the application realizes high-fidelity introduction of an infrasound signal for pipeline leakage detection while ensuring safety and reliability.

The invention relates to an audio recognition method and device, computer equipment, a storage medium and a program product, and relates to the technical field of audio recognition. The method is executed by computer equipment and comprises the steps that audio identification information of an audio file is obtained, the audio identification information is information obtained after a target frequency band in the audio file is converted, and the target frequency band comprises at least one of an ultrasonic frequency band and an infrasonic wave frequency band; based on the audio identification information, executing an identification operation on the audio file to obtain an identification result; specification processing is performed based on the recognition result. According to the audio recognition scheme, the audio recognition accuracy can be improved on the basis of ensuring the concealment and security of the watermark information of the audio file.

The embodiment of the application provides a kind of equipment abnormality detection method and system based on infrasonic wave data, belong to equipment state detection technical technical field.The method comprises: collecting infrasonic wave signal and corresponding medium characteristic parameter in the running process of target equipment, establish the medium propagation characteristic table for representing signal propagation path;Based on the medium propagation characteristic table, construct propagation correction model, execute distortion correction to infrasonic wave signal, output correction signal;Based on correction signal, extract time-varying characteristic parameter and construct time-varying characteristic matrix, calculate characteristic drift rate and input drift determination model;Based on drift determination model, execute environment normalization and covariance drift analysis, when drift rate exceeds preset threshold, output equipment abnormality determination result.The present application scheme realizes the distortion correction of infrasonic wave signal in complex propagation medium and multi-feature covariance drift identification, so as to accurately locate equipment abnormal position under environmental interference and determine abnormal type.

The invention relates to the technical field of oil and gas pipeline defect infrasonic wave detection. The invention relates to an infrasonic wave detection method based on oil and gas pipeline defects. The method comprises the following steps: S1, deploying an infrasonic wave sensor array to collect infrasonic wave signals of an oil and gas pipeline, and synchronously obtaining oil and gas state parameters and working condition parameters of the oil and gas pipeline and the mounting position of each infrasonic wave sensor; according to the method, by adopting a hierarchical positioning strategy of combining a fuzzy positioning narrowing range with multi-sensor joint precise positioning, firstly, a fuzzy defect position is quickly locked through a signal time difference and amplitude attenuation rule, and then an optimization model is constructed by utilizing a least square method in combination with a defect type, a signal difference characteristic and sensor space information; the defect positioning precision is greatly improved, the positioning error is controlled within an acceptable range of actual operation and maintenance, and accurate position reference is provided for on-site defect disposal.

The invention relates to the field of acoustics, and discloses an infrasonic wave directivity regulation and control resonance structure, which comprises an annular structure formed by a plurality of splicing monomers, each splicing monomer comprises a resonance unit and a temperature control unit, each resonance unit comprises a plurality of same sub-modules, each sub-module is arranged along the radial direction of the resonance unit, and each sub-module is connected with the corresponding temperature control unit. The sub-modules are fan-shaped along the outer contour of the radial section of the resonance unit, a labyrinth-shaped channel is formed in each sub-module, each sub-module is provided with an inlet, the resonance unit is provided with a through channel in the radius direction of the resonance unit, the temperature control unit comprises a power supply and a temperature adjusting end which are connected with each other, and the temperature adjusting end is located in the through channel. And the temperature adjusting end can refrigerate and heat. According to the invention, infrasonic wave radiation is controlled only through the resonance unit which is designed through a special structure, the working frequency of the structure is changed through the temperature control unit, dynamic directivity regulation and control of infrasonic waves with different frequencies are realized, and the device has the advantages of compact structure, simplicity, high efficiency, flexibility, adjustability and the like.

The invention relates to the technical field of drainage pipelines, and discloses a defect detection method, device and equipment of a drainage pipeline, a medium and a program product, and the defect detection method of the drainage pipeline comprises the following steps: controlling an infrasonic wave signal transmitter to transmit an infrasonic wave signal to a target drainage pipeline, and collecting a plurality of initial echo signals of an infrasonic wave signal receiver array; performing pulse compression processing on each initial echo signal to obtain a plurality of pulse compression output signals; determining echo arrival time corresponding to each pulse compression output signal according to the position of a correlation peak in each pulse compression output signal; according to the echo arrival time corresponding to each pulse compression output signal, the position information of the infrasonic wave signal transmitter, the position information of each sensor array element in the infrasonic wave signal receiver array and the preset sound velocity, the position of the defect in the target drainage pipeline is determined. The defect position of the drainage pipeline is detected, and the accuracy of drainage pipeline defect detection is improved.

A method for stimulating hydrogen production (200) from an injected formation (102). The method includes the step of providing a well system (106) through a subterranean formation (104) into an injected formation (102) containing hydrocarbons. Carbon dioxide, water, steam, and combustion gases are introduced into the injection formation (102) via a well system (106). Further, one or more of infrasonic, acoustic, and ultrasonic stimulation (225) is used to stimulate the injected formation (102). The injected formation (102) is monitored (230) via one or more sensors located in the injected formation (102) to determine one or more properties of the reaction and backflow effluent in the injected formation (102). A reflux operation (240) is performed to recover a reflux effluent.

The utility model discloses a medium infrasonic wave change-based leakage monitoring device for a directly-buried heat supply pipeline, which comprises a pipeline body, and the upper side of the pipeline body is connected with a mounting plate; the connecting plate is movably mounted at the lower end of the pipeline body, a fixing structure is fixedly mounted on the outer side of the upper end of the connecting plate, and the fixing structure comprises a fixing plate, a movable block and a mounting rod; the signal processor is arranged on the middle side of the upper end of the mounting plate, a fixing block is fixedly mounted on the outer side of the lower end of the mounting plate, a limiting structure is connected to the outer side of the middle of the mounting plate, an infrared thermal imager is connected to the lower side of the limiting structure, and the limiting structure comprises a fixing rod and a connecting block. According to the direct burial heat supply pipeline leakage monitoring device based on the medium infrasonic wave change, the fixing structure is arranged, the infrasonic wave sensor can be installed, the limiting structure is arranged, the infrared thermal imager can be installed, and therefore the leakage position can be rapidly locked.

The invention discloses a down-the-hole drill control method and system for pile foundation hole forming combined with blasting construction, and relates to the field of measurement of ultrasonic waves, sound waves or infrasonic waves, in the method, a sound wave emitter is controlled to emit first detection sound waves, and direct waves and stratum waves are collected; first rock mass acoustic characteristic parameters are calculated, and one or more suggested blasting areas are determined; after millisecond blasting is executed, the down-the-hole drill is driven again, and the sound wave emitter is controlled to emit second detection sound waves; second rock mass acoustic characteristic parameters are obtained through calculation; determining a blasting fracturing weakening area and acoustic characteristic parameters corresponding to the blasting fracturing weakening area; and the controller adjusts at least one working parameter of the down-the-hole drill according to the acoustic characteristic parameters, so that the unit footage energy consumption of the down-the-hole drill in the drilling process is maintained within a preset range. The method is used for improving the window hit rate and the time sequence alignment precision, further improving the footage efficiency, reducing the unit footage energy consumption and the hammer clamping risk, and enhancing the stability of the hole forming quality.

The invention provides a pipeline leakage recognition algorithm and system. The pipeline leakage recognition algorithm comprises the steps of obtaining a training data set; the training data set comprises a joint feature vector and a leakage category; the joint feature vector is obtained by processing and fusing a training infrasonic wave signal detected by a first sensor arranged in the pipeline and a training vibration signal detected by a second sensor arranged outside the pipeline; the leakage types comprise no leakage opening, leakage opening and hole diameter of the leakage opening; training a leakage identification model by adopting the training data set; the input of the leakage identification model comprises a joint feature vector, and the output of the leakage identification model comprises a leakage category; acquiring a real-time infrasonic wave signal and a real-time vibration signal; processing the real-time infrasonic wave signal and the real-time vibration signal to obtain a real-time joint feature vector; and inputting the real-time joint feature vector into a leakage identification model to obtain a real-time leakage type of the pipeline. According to the pipeline leakage identification algorithm, the detection precision of small-aperture leakage of the pipeline can be improved.

Infrasonic musical vibrations may be induced into various compartments of the body for therapeutic purposes, ranging from relaxation to arousal or focus, but also specifically activating physiologic responses due to vibration sensitive receptors in these spaces. These include vibration of the wall of the enteral track to control appetite, vibration of the effacing cervix to augment the birthing reflex, augmentation of bladder urge control in training against incontinence, and inducing relief from craving in relapse prone individuals with various addictions. Exemplary embodiments facilitate induction of such harmonized and phased oscillations in a seated embodiment, and also their measurement at target locations as an integrated, individualized method for treatment.

The invention relates to the technical field of bird repelling, in particular to an infrasound bird repelling device for a high-voltage power grid and a bird repelling method thereof.The infrasound bird repelling device comprises a protection frame, two protection plates are rotationally connected to the top of the protection frame, solar panels are fixedly connected to the bottoms of the two protection plates, and fixing strips are fixedly connected to the bottoms of the protection plates; a connecting strip is rotationally connected to the lower side of the front side of the fixing strip, a deflection mechanism used for opening and closing the protection frame is rotationally connected to the side face of the connecting strip, an infrasonic wave generator is fixedly connected to the bottom face of the inner wall of the protection frame, and an output pipe is fixedly arranged at the top of the infrasonic wave generator; a stepping motor drives a gear block and an annular sleeve to rotate through a gear, an arc-shaped groove rotates along with the gear block, a circular block slides along the arc-shaped groove and drives a deflection plate to move under limiting of a chute, and the size of a middle gap of the deflection plate is changed. The stepping motor rotates back and forth to continuously change the size of the gap, so that the frequency of sound waves in the output pipe is adjusted, birds are prevented from adapting, and the bird repelling effect is guaranteed.

The invention discloses a sailing early warning device for expelling wild animals by utilizing infrasonic waves in the technical field of sailing early warning equipment, which comprises an aircraft and a mounting seat arranged on the aircraft, and the mounting seat is provided with a warning indicator, a sound wave generating device, a controller, a placing assembly and a monitoring device, the controller is used for controlling the sound wave generating equipment to emit infrasonic waves to drive the wild animals when the monitoring equipment detects the wild animals; when wild animals are detected through the controller, the mounting assembly is controlled to insert the driving part in the placement box into the ground, so that the driving part can continuously work to drive the surrounding wild animals, the problem that the wild animals quickly return after the unmanned equipment leaves is solved, and the long-time and stable protection effect is achieved; vegetation in the protected area is protected, and ecological restoration is promoted.

The application provides a method for determining the speed of sound and the attenuation coefficient of the infrasonic wave of a non-saturated soil slope, and the steps are as follows: 1. Based on the Biot-Geertsma low-frequency limit theory and the boundary layer viscous loss model, the hypothesis is obtained, and the basic parameters are obtained; 2. The Brutsaert modified equal strain model is used to determine the modulus of the three-phase composite fluid; 3. The equivalent density, dry skeleton modulus and other equivalent medium parameters are calculated; 4. The complex wave number is calculated after the viscous loss is corrected; 5. The speed of sound c and the attenuation coefficient alpha are determined by the real part and the imaginary part of the complex wave number respectively. The application can output the speed of sound and the attenuation coefficient synchronously by coupling the double model, can calibrate the slope instability early warning threshold more accurately, and provides a more comprehensive acoustic characteristic theoretical basis for the slope instability early warning; the three-phase coupling effect (skeleton deformation, fluid viscosity and gas-liquid interface effect) is fully considered, so that the acoustic characteristic parameters can truly reflect the internal physical state of the non-saturated soil, and high credibility support is provided for the monitoring data analysis.

The invention relates to the technical field of medical rehabilitation equipment and physical acoustics, in particular to a broadband infrasonic wave broadband resonance system for a hyperbaric oxygen cabin, which comprises a resonator main body and a broadband infrasonic wave generator, the resonator main body comprises a resonator I and a resonator II, the resonator I is electrically connected with an electronic coil transmitting antenna, and the electronic coil transmitting antenna is electrically connected with the broadband infrasonic wave generator. The first resonator is electrically connected with the loudspeaker moving coil, the second resonator is electrically connected with the loudspeaker moving coil, a resonant cavity is arranged between the first resonator and the second resonator, a broadband infrasonic wave generator is arranged at the bottom of the resonant cavity, the broadband infrasonic wave generator is electrically connected with the control unit, and the broadband infrasonic wave generator and the control unit are both electrically connected with the power supply. The device is reasonable in structure, and the intelligent device enables the device to be easy to install, operate and use; the broadband infrasonic wave generator, the first resonator and the second resonator are arranged, and the double effects of electromagnetic wave emission and space sound wave propagation are fully utilized. By combining the broadband infrasonic wave resonance technology, the oxygen therapy and broadband infrasonic wave physical therapy effects are improved at the same time, and human health is promoted.

The invention provides a butterfly species intelligent identification method and system. The method comprises the following steps: constructing a form and life cycle association feature library; collecting butterfly dynamic behavior video data based on the database, analyzing behavior rules, and generating behavior feature vectors; constructing an ecological-species association dynamic model, mining a response relationship, and generating an ecological feature vector; a butterfly flight wing vibration infrasonic wave signal is collected, and an acoustic feature vector is extracted. And carrying out fusion by using a multi-modal Transform architecture, and carrying out contrast learning alignment to generate a fusion feature vector. And based on this, a recognition model is constructed, and a final model output recognition result is generated. According to the method, illumination interference is resisted through three-dimensional point cloud data, the problem of image missing is solved through an LSTM-GNN network rule, the problem of correcting single ecological data through ecological feature vectors is solved, environmental noise influences are filtered out through acoustic features, complementary fusion feature vectors are formed through four-modal feature fusion, and the model keeps high accuracy in a complex scene.

The invention relates to the technical field of electrolytic hydrogen production, in particular to a liquid lithium battery infrasonic wave excitation system which comprises an electrode block connected to a negative electrode of a power source, the electrode block is provided with a hollow inner cavity, and the inner cavity is provided with an upper opening and a lower opening; the infrasonic wave loudspeaker is connected to the upper opening of the electrode block; a vibrating diaphragm is arranged at the lower opening of the inner cavity; the infrasonic wave loudspeaker is connected to the infrasonic wave generating circuit; the electrode block is further connected with an ultrasonic piezoelectric ceramic piece, one end of the ultrasonic piezoelectric ceramic piece extends into the inner cavity, and the other end of the ultrasonic piezoelectric ceramic piece extends out of the outer side of the rod body of the electrode block. The system further comprises a battery internal resistance tester which extends into the electrolyte. The system further comprises a micro-processor system, the signal output end of the battery internal resistance tester is connected to the signal input end of the micro-processor system, and the micro-processor system controls on-off of the ultrasonic wave generation circuit and the infrasonic wave generation circuit to guarantee continuous and efficient operation of the electrode block.

The invention relates to a multi-physical field synchronous measurement system for a pneumatic membrane structure, which relates to the technical field of acoustic vibration measurement and comprises an ultrasonic propagation characteristic measurement unit, a mechanical vibration spectrum analysis unit, an infrasonic wave spectrum inversion unit and an acoustic vibration coupling modeling unit, the ultrasonic propagation characteristic measurement unit, the mechanical vibration spectrum analysis unit and the infrasonic wave spectrum inversion unit are all connected with the acoustic vibration coupling modeling unit through high-speed data interfaces. According to the multi-physical-field synchronous measurement system for the pneumatic membrane structure, acoustic vibration characteristic parameters are used as direct measurement objects, so that an error path in which acoustic vibration signals are indirectly used for deducing pressure or displacement in a traditional method is thoroughly abandoned, and the measurement precision and the technical essence are remarkably improved; the ultrasonic propagation characteristic measuring unit adopts a multi-band pulse coding emission technology, performs 100-step scanning by dynamically adjusting a frequency sequence from 100 kHz to 10 MHz, and effectively inhibits errors caused by gas density fluctuation + / -5%.

The systems, methods, and devices disclose a transducer system located in a room or in an area to provide an alert to one or more persons. The transducer system includes at least a receiver, a processor and a speaker. The receiver receives an alert message sent from an alarm system or from another transducer system. The processor is configured to determine, from a plurality of notification messages, a notification message based on the alert event indicated by the alert message. Each of the plurality of notification messages corresponds to a different alert event, and each of the plurality of notification messages includes information to vibrate a speaker according to a different pre-determined vibration pattern. The speaker is moveable to generate a vibration pattern according to the determined notification message to inform a person about the alert event, wherein the speaker generates the vibration pattern in a low-frequency range.

The invention discloses an infrasonic wave leakage monitoring system evaluation method, and relates to the technical field of pipeline defect detection. Comprising the following steps: performing system self-inspection on a monitoring system to obtain self-inspection index parameters; performing a normal operation condition simulation leakage test at the simulation discharge point, and recording normal condition simulation test data; performing an abnormal operation condition simulation leakage test at the simulation discharge point, and recording abnormal condition simulation test data; based on the normal working condition simulation data and the abnormal working condition simulation test data, performing statistics to obtain technical index parameters of the monitoring system; effectiveness testing is carried out on each sensor of the monitoring system, and effectiveness index parameters are obtained; performing a leakage signal simulation test on the monitoring system to obtain a signal index parameter of the monitoring system; and judging whether the performance of the monitoring system is qualified or not based on the self-inspection index parameter, the technical index parameter, the effectiveness index parameter and the signal index parameter. The method can accurately evaluate the effectiveness of the technical indexes of the leakage monitoring system.

The invention discloses a wildlife activity risk early warning system and method based on recorded infrasonic waves in the technical field of wildlife research, and the system comprises a supporting column, and a processing device, a transmission device and a sound collection device which are disposed on the supporting column, and the sound collection device is used for collecting the infrasonic waves around the supporting column; the processing device comprises a central processing module and an alarm module, a detection device and a driving assembly are arranged on the supporting column, and the central processing module is used for controlling the driving assembly to be started to drive the wild animals when the detection device detects that the distance between the wild animals and the supporting column is smaller than a threshold value; the distance between the wild animals and the supporting columns is detected through the detection equipment, and when it is detected that the distance between the wild animals and the supporting columns is smaller than the threshold value, the processing equipment controls the driving assembly to be started to drive the wild animals, so that the early warning system has emergency measures and is used for protecting the wild animals and the early warning system.

The invention relates to the technical field of chimes, in particular to a harmonic therapeutic healing health-care chime which comprises a suspension bracket, a chime group composed of a plurality of U-shaped sound tubes is suspended on the suspension bracket, openings of the U-shaped sound tubes are arranged downwards, and musical scales of the chime group adopt musical sound sequence combination with the fundamental frequency of 380Hz-500Hz. The chime provided by the invention adopts a pure yellow clock 432Hz fundamental frequency musical sound sequence combination, the smooth rhythm and penetrating power of the chime can effectively soothe the body, relax nerves and promote cell and body repair, and ultrasonic waves, infrasonic waves, second-order harmonic waves and third-order harmonic waves generated during playing can deconstruct and kill microorganisms and viruses, so that the therapeutic and healing value of expelling evil and eliminating diseases is fully exerted, and the chime has a good application prospect. The problem that a traditional chime is difficult to accurately adapt to the modern health care acoustic therapy and healing requirements is solved.

The invention discloses a high-speed rolling process for a battery aluminum foil, which adopts a multi-pass rolling method and comprises the following steps of: adopting incremental deformation, traction tension and rolling speed at the initial stage of rolling, and adopting progressive deformation, traction tension and rolling speed at the final stage of rolling. And meanwhile, it is ensured that the ratio of the thinning rate of the blank to the rolling speed and the traction tension in the multi-pass rolling process meets the exponential function relation. The method comprises the following steps: accurately setting the reduction rate range, inlet / outlet tension and rolling speed of each pass, configuring a cogging roller, a middle roller and a finished roller with specific convexity, matching with gradient control of the temperature of the rollers of each pass and the injection flow of rolling oil, and arranging an oil removal roller with an adjustable frequency infrasonic wave vibration function on a rolling line. According to the technical scheme, under the high-speed condition that the average rolling speed is 800 m / min, high-efficiency production is guaranteed, meanwhile, the belt breakage risk is reduced, and the foil face rolling oil residues are reduced.

The invention relates to a thickness detection system for silk-screen printing of a battery piece, in particular to the field of metering equipment which is used for metering thickness and is characterized by infrasonic wave, acoustic wave and ultrasonic vibration, and the system comprises a continuous training mechanism which is used for analyzing an AI thickness detection model; and the thickness detection mechanism is used for detecting the overall grid line printing thickness and the grid line printing thickness mean square error of the target battery piece based on the configuration content and the visual data of the grid lines and the visual data of the piece body by adopting an AI thickness detection model. The invention also relates to a thickness detection method for the silk-screen printing of the battery piece. According to the invention, in order to solve the technical problem that the overall thickness information of grid line printing is difficult to reliably measure under the background of fine screen printing, the ultrasonic vibration mechanism is adopted to carry out vibration processing on the target battery piece to obtain the target battery piece in a horizontal placement state, and the AI thickness detection model is adopted to detect the overall thickness information of grid line printing; therefore, the technical problem is solved.

The invention provides an unsaturated soil slope infrasonic wave sound velocity and attenuation coefficient determination method, which comprises the following steps of 1, extracting hypothesis based on a Biot-Gertsma low-frequency limit theory and a boundary layer viscosity loss model, and obtaining basic parameters; 2, adopting a Brutsaert correction'equal strain 'model to determine a three-phase composite fluid modulus; 3, calculating equivalent medium parameters such as equivalent density and dry skeleton modulus; 4, calculating a complex wave number after viscosity loss correction; and 5, respectively determining the sound velocity c and the attenuation coefficient alpha according to the real part and the imaginary part of the complex wave number. According to the method, double models are coupled to synchronously output the sound velocity and the attenuation coefficient, the slope instability early warning threshold value can be calibrated more accurately, and a more comprehensive sound characteristic theoretical basis is provided for slope instability early warning; the three-phase coupling effect (skeleton deformation, fluid viscosity and gas-liquid interface action) is fully considered, it is ensured that acoustic characteristic parameters can truly reflect the internal physical state of unsaturated soil, and high-reliability support is provided for monitoring data analysis.