845 results about "Vibration exciter" patented technology

The invention discloses a mechanical arm welding detection intelligent diagnosis method and system based on laser ultrasonic guided waves. According to the system, a high-precision multi-degree-of-freedom steering engine, an infrared distance measurement array, a temperature sensor, a laser vibration exciter and a laser vibration meter are integrated at the tail end of a mechanical arm, synchronous operation of welding and online detection is achieved by presetting a welding track, and the system collects an excitation signal, a reflection ultrasonic signal and temperature data through a high-speed data collection card; and the signal is preprocessed through a temperature matching model, phase compensation and baseline correction. Then, wavelet decomposition is adopted to extract time-frequency features, intelligent diagnosis is achieved through a pre-trained one-dimensional convolutional neural network, a dynamic threshold value is set based on the 3 sigma criterion, and recheck feedback is automatically triggered when detection data exceed the limit, the welding detection efficiency and precision are remarkably improved through the scheme, data closed-loop management and intelligent quality tracing are achieved, and the reliability of welding detection is improved. And the automatic production requirement of modern steel structure manufacturing is met.

The invention relates to an AI server cooling water pump vibration quantity self-adaptive calibration test method and system, an intelligent test platform integrates a six-dimensional force sensor and a temperature compensation vibration exciter, the platform rigidity is automatically calibrated, a water pump-pipeline system transfer function is obtained, and a rotating speed-lift-modal frequency three-dimensional mathematical model is established; a three-axis MEMS accelerometer array is arranged at sensitive parts such as a water pump bearing seat and a motor shell, and vibration, current and pressure signals are synchronously collected; carrying out time-frequency domain signal processing by adopting variational mode decomposition in combination with self-adaptive S transformation, and extracting a 128-dimensional full-frequency domain feature vector containing a modulation side frequency band; effective values of vibration acceleration, speed and displacement are calculated through a frequency domain integration algorithm, and current harmonic interference is corrected through an electromagnetic vibration compensation model; and finally, a vibration health degree evaluation model containing 18 characteristic parameters is established based on a support vector machine, the test system comprises an intelligent test platform unit, a multi-source sensing unit, an edge calculation unit and a data management unit, and microsecond-level synchronous acquisition and GB-level data throughput are realized through a time sensitive network. And online incremental learning and automatic generation of a test report are supported. The method has the effect of improving the water pump vibration quantity test precision.

The invention discloses a loss tuning method of a power transformer, which is applied to a transformer body sleeved with a winding and comprises the following steps: applying scanning current excitation containing fundamental waves and harmonic waves to the winding, synchronously acquiring a body vibration signal and converting the body vibration signal into a frequency spectrum; extracting a formant from the frequency spectrum, matching the formant with a theoretical electromagnetic force wave and a structure inherent frequency library, and identifying a coupling formant to be optimized; aiming at each formant, installing a vibration exciter in a corresponding area, sending out an anti-phase periodic pulse force, and dynamically and finely adjusting a pulse force parameter by monitoring a vibration response in real time and taking equivalent mechanical impedance minimization as a target; when the optimal damping state is achieved, the vibration exciter output rod is locked, and static pre-tightening force is formed; and after all formants are adjusted and optimized in sequence and the prestress is locked, final pressing and fixing of the transformer body are completed in the state that the pretightening force is kept. According to the invention, the dynamic loss source of the individual transformer can be actively inhibited and cured before assembly and curing, the operation loss and noise are effectively reduced, and the structural stability is improved.

The invention relates to the technical field of parameter control, and discloses a vibrating screen parameter self-adaptive control method and system based on machine learning. The method comprises the following steps: collecting coal characteristic parameters through an image device and a sensor; calculating a load coefficient and a difficulty index according to the parameters, and adjusting the parameters of the dual-motor vibration exciter to control vibration; the spring pre-tightening force and the screen surface inclination angle are adjusted according to vibration feedback, and the screening track is optimized; and the feeding speed and the baffle height are adjusted based on screening efficiency data, and self-adaptive control is achieved. The technical problems that traditional vibrating screen fixed parameter control cannot adapt to multi-coal-type changes, a vibrating screen control system lacks coal material characteristic real-time sensing and analyzing capacity, and a precise mapping and dynamic optimization mechanism is lacked between vibrating parameters and screening efficiency are solved.

The invention relates to the technical field of data processing, and discloses an environment detection analysis method and system based on a simulation micro-motion signal excitation generator. The method comprises the following steps: generating a vertical vibration signal through an integrated structure of a constant-resistance vibration exciter and a special coupling base; performing multi-band signal excitation and station arrangement according to the frequency parameter combination; filtering and normalizing the original signal, and calculating a spatial autocorrelation coefficient; a frequency dispersion curve is extracted through an SPAC method; inverting an underground S-wave velocity structure by using a divergence genetic algorithm; and analyzing the speed abnormal region by adopting an edge detection algorithm, and determining the position and state of the box culvert body. According to the invention, high-precision non-destructive detection of the buried power pipeline box culvert body is realized in an urban complex underground environment.

The invention relates to a large-scale structure dynamic response prediction method based on a hybrid deep learning model. The method comprises the following steps: establishing a finite element model of a large-scale structure; a vibration exciter is used for measuring modal parameters of the large-scale structure, and the finite element model of the large-scale structure is corrected according to the modal parameters of the large-scale structure; simulating the dynamic response of the large-scale structure under the dynamic load by using the corrected finite element model; meanwhile, a sensor is used for actually collecting the dynamic response of the large-scale structure under the dynamic load; constructing a training set through analog simulation and actually acquired dynamic response of the large-scale structure under the dynamic load; training the hybrid deep learning model according to the constructed training set; and inputting the dynamic load acting on the large-scale structure into the trained deep learning model to predict the dynamic response of the large-scale structure. According to the method, the prediction efficiency and accuracy are improved, the generalization ability of the model is enhanced, and the method can adapt to various different environments and conditions.

The invention discloses a vibration type battery liquid cooling device and a method thereof.The vibration type battery liquid cooling device comprises a sealing box body containing cooling liquid, a battery, a temperature adjusting assembly, a water pump, a vibration assembly and a controller, a gas cavity is formed between the upper surface of the cooling liquid and the inner top wall of the sealing box body, and the battery is detachably installed in the sealing box body and immersed in the cooling liquid; the temperature adjusting assembly is arranged on the inner wall of the sealing box body, the vibration assembly is arranged at the bottom of the outer side of the sealing box body, a water inlet and a water outlet lower than the water inlet are formed in the two sides of the sealing box body respectively, and the water inlet and the water outlet are connected with the water pump through pipelines respectively to form a circulating water path. The controller is in signal connection with the temperature adjusting assembly, the water pump and the vibration assembly. On the basis of circulating water cooling of a traditional battery, vibration generated by the vibration exciter installed below the sealed box body promotes instability of a temperature boundary layer in cooling liquid, the convection heat exchange efficiency of flowing is improved along with enhancement of vibration strength, and the cooling efficiency is improved.

The permanent magnet type dual-drive electric vibration exciter comprises a magnetic circuit assembly and a moving coil assembly, the magnetic circuit assembly comprises a magnetic steel ring, an upper permanent magnet, a lower permanent magnet, a center magnetic pole and a bottom connecting plate, a first containing space and a second containing space are arranged in the magnetic steel ring, the upper permanent magnet is arranged in the first containing space, and the lower permanent magnet is arranged in the second containing space. The moving coil assembly comprises a moving coil framework, a first driving coil and a second driving coil, the first driving coil and the second driving coil are wound on the moving coil framework, the upper permanent magnet, the magnetic steel ring and the center magnetic pole form an upper magnetic field ring space, the first driving coil is located in the upper magnetic field ring space, and the second driving coil is located in the lower magnetic field ring space. The lower permanent magnet, the magnetic steel ring and the central magnetic pole form a lower magnetic field ring space, the second driving coil is located in the lower magnetic field ring space, the central magnetic pole is arranged in the magnetic steel ring, and the bottom connecting plate is arranged at the bottom of the lower magnetic steel ring; two independent magnetic field loops are established, a larger magnetic field is achieved, thrust is increased, the utilization rate of the magnetic field is improved, and higher vertical vibration precision and smaller transverse vibration are achieved.

The embodiment of the invention provides an engine suspension test bench, method and equipment and a storage medium, and the test bench comprises a vibration table which is used for constraining and installing a to-be-tested engine and a suspension; the support buffer piece is arranged below the vibration table and is used for supporting the vibration table, the engine to be tested and the suspension so as to enable the vibration table, the engine to be tested and the suspension to be in a suspension state; the vibration exciters are arranged on the two opposite sides of the vibration table, and the vibration exciters are used for driving the vibration table to vibrate during in-phase excitation or anti-phase excitation so as to simulate road vibration; and the controller is connected with the vibration exciter and is used for exciting the vibration exciter in the same phase or in the opposite phase. When the rack is used for testing, the vibration condition performance similar to the pavement can be simulated, and the functions of risk assessment and abnormal sound problem reproduction of the suspension abnormal sound are realized, so that the verification period is shortened, and the test comprehensiveness is ensured.

The invention discloses high-voltage wiring harness connector terminal fretting wear test equipment which comprises an equipment base, a high-frequency vibration exciter and a lifting platform are mounted on the equipment base, and a mounting platform is arranged at the top of the lifting platform; a left test piece mounting loading mechanism and a right test piece mounting force measuring device are arranged on the mounting platform. The device can realize a multi-physics field coupling test, current-carrying friction and arc erosion of an electric contact surface in a real working condition are simulated by combining a current load with high-frequency mechanical wear, and the electric-mechanical coupling wear characteristic of a new energy automobile charging terminal is accurately reproduced. The device supports the dynamic adjustment of normal load, simulates the contact pressure change of the left and right test samples of the test terminal in the plugging process through the test sample pin and the test sample jack, can be used for researching the relevance between the fretting wear and the contact resistance of the test terminal under different loads, and realizes the test of the terminal under complex working conditions in a laboratory environment. The test process is convenient, efficient and accurate, and the test cost and the test period are greatly reduced.

The invention provides a rock testing device and method based on laser calibration excitation compensation, and relates to the technical field of rock physical testing, and the rock testing device comprises a rock sample clamping part which is used for clamping a rock sample; the strain testing part is used for being arranged on the surface of the rock sample; the output end of the vibration exciter is in contact with the rock sample clamping component; the driving module is connected with the vibration exciter and is used for inputting an electric signal to the vibration exciter so as to drive the vibration exciter to operate; the laser vibration meter is used for testing the acceleration of the output end of the vibration exciter during no-load operation under different operation frequencies; the problem that in the prior art, in a large frequency range, the testing precision of rock physical testing under different frequencies is poor is solved.

The invention discloses a large-stroke hydraulic vibration horizontal test bed, which is used for solving the problems of interference, abrasion and easy fatigue fracture of a force transmission component caused by a centering error between a large-stroke hydraulic vibration exciter and a horizontal table board. The test bed comprises a base, a hydraulic vibration exciter, a horizontal table top and a spring plate assembly connecting the base and the hydraulic vibration exciter. A function decoupling design is adopted, wherein a guide rail compensation block with horizontal transverse elasticity is arranged in a guide mechanism between a horizontal table top and a base and is specially used for dynamically compensating centering errors in the horizontal direction; meanwhile, the spring plate assembly is constructed to be composed of multiple layers of stacked spring plates parallel to the horizontal table top, centering errors in the vertical direction are dynamically compensated through bending flexibility of the spring plates in the vertical plane, the working stress is greatly reduced through the multi-layer structure, and the fatigue life is prolonged. By means of the design, unification of high-rigidity excitation force transmission and multi-dimensional dynamic error compensation is achieved, the reliability and precision of equipment are remarkably improved, and the service life of the equipment is remarkably prolonged.

The invention provides a low-frequency excitation and high-frequency impact coupled void lining test device and method, and belongs to the technical field of tunnel instability monitoring, and the device comprises a lining loading system, a low-frequency excitation system and a high-frequency impact system. The loading mechanism simulates the surrounding rock load borne by the lining in the circumferential direction, and the surrounding rock load borne by the lining can be simulated by adjusting parameters such as the magnitude and the direction of loading force. The vibration exciter is matched with the power amplifier, low-frequency and high-amplitude vibration matched with the axle load characteristics of the train can be generated, and the fatigue damage effect on the lining caused by long-term running of the train is simulated. When the electric detacher controls the drop hammer to be separated from the truss and fall freely, high-frequency transient impact force can be generated, and the transient load effect of a lining impacted by falling rocks is simulated. According to the test device, through multi-physics field coupling loading, the problems that a void lining damage mechanism is unclear and prediction means are deficient are solved, a complete technical chain is provided for railway tunnel structure safety, and the test device has academic value and engineering popularization significance.

The invention relates to the technical field of vibrating feeders, and particularly discloses a vibrating feeder which comprises a rack, a vibration exciter and a feeding groove, the feeding groove comprises a first groove body and a second groove body, the second groove body is connected to the lower portion of the first groove body, the second groove body is obliquely arranged rightwards, and at least one layer of screen cloth parallel to the bottom of the second groove body is arranged in the second groove body from bottom to top; the screen divides the second groove into at least an upper groove body and a lower groove body, a partition plate is arranged below the left side of the screen to divide the groove body below the partition plate into a left space and a right space, the screen comprises a fixed column parallel to the second groove and a plurality of movable rods extending in the front-back direction, and an elastic piece is installed between each movable rod and the fixed column. The front end of each layer of groove body is provided with a blocking piece used for sealing the groove body, each blocking piece is provided with an elastic pushing piece, and one side of each elastic pushing piece is further provided with a locking assembly. The size of the screen is small so that cleaning can be facilitated, and the crushing efficiency of the materials is improved by intermittently enabling the materials to fall down.

The invention relates to the technical field of residual stress regulation and control of castings, in particular to a device and a method for regulating and controlling residual stress of a casting after heat treatment. In order to solve the problem that a common method for regulating and controlling the residual stress of the casting after heat treatment is poor in regulating and controlling effect on a stress concentration area or internal residual stress of the casting, the invention provides a device and a method for regulating and controlling the residual stress of the casting after heat treatment. The vibration aging mechanism comprises a vibration reduction platform, an elastic cushion and a vibration exciter, and the elastic cushion is fixed to the upper surface of the vibration reduction platform; the shot peening strengthening mechanism comprises two linear modules, two six-axis mechanical arms and two shot peening assemblies, the two six-axis mechanical arms are fixed to the two linear modules correspondingly, each shot peening assembly comprises a shot peening pipe, and the shot peening pipes are fixed to the tail ends of the six-axis mechanical arms. During use, the vibration aging mechanism and the shot peening strengthening mechanism are used for carrying out synchronous coupling regulation and control on the casting. The regulation and control device is simple in structure and convenient to operate.

The invention relates to the technical field of strip mine side slope slippage trend early warning, and particularly discloses a strip mine side slope slippage trend early warning system based on active micro-vibration excitation, which comprises the following components: an excitation unit which is composed of a frequency-adjustable micro-vibration exciter which periodically applies low-amplitude controllable mechanical disturbance signals to a side slope rock mass, the rock-soil medium structure response is excited, and the early warning sensitivity is improved; the sensing unit comprises a three-axis acceleration sensor, a displacement meter, a GNSS (Global Navigation Satellite System) sensor and a ground acoustic wave sensor, and is used for recording response change in a vibration disturbance signal propagation process and obtaining data; the analysis unit comprises an edge intelligent terminal, a slippage trend identification model built in the edge intelligent terminal and a lightweight neural network, and the slippage trend identification model performs sensing processing on the data and outputs a slippage trend label; and the communication control unit is used for ensuring that the data streams of the units are stable and cooperatively run with the modules.

The invention belongs to the technical field of high-frequency vibration dehydration and medium drainage, and particularly relates to flange type vibration exciter high-frequency vibration dehydration and medium drainage equipment which comprises a vibration excitation base, a motor frame, a vibration excitation body screening mechanism and a pressure rotating type auxiliary vibration mechanism, the motor frame is arranged on one side of the vibration excitation base, the vibration excitation body screening mechanism is arranged on the upper wall of the vibration excitation base, and the pressure rotating type auxiliary vibration mechanism is arranged on the other side of the vibration excitation base. The rotating pressure type auxiliary vibration mechanism is arranged on the vibration excitation body screening mechanism, the vibration excitation body screening mechanism comprises a material screening mechanism, a discharging mechanism and a driving mechanism, the material screening mechanism is arranged on the upper wall of the vibration excitation base, the discharging mechanism is arranged on the inner wall of one end of the material screening mechanism, and the driving mechanism is arranged on the bottom wall of the material screening mechanism. The flange type vibration exciter high-frequency vibration dehydration and medium drainage equipment provided by the invention can accelerate the evaporation speed of moisture on the surface of a material with relatively high humidity, can reduce the probability of blockage of the screen in the material screening process, and can limit the jumping height of the material jumping on the screen.

The invention provides a crimping quality online detection method and system based on acoustic emission signal analysis, relates to the technical field of industrial detection, and solves the technical problems that an existing detection method is not sensitive to early defects and is insufficient in adaptability under complex working conditions. The method comprises the following steps: applying mechanical excitation to the crimping structure, exciting the crimping structure to generate vibration response, and synchronously collecting a vibration response signal and an acoustic emission signal; wherein the mechanical excitation represents sweep frequency excitation or pulse excitation generated by a piezoelectric vibration exciter or an impact hammer so as to excite a plurality of co-frequency offset vibration modes of the crimping structure; calculating the resonant frequency of the crimping structure based on the vibration response signal; calculating frequency offset characteristic parameters according to the resonant frequency based on an inversion method of a physical model; calculating acoustic emission signal characteristic parameters based on the acoustic emission signals; and identifying the type and severity of the crimping defect by utilizing a D-S evidence theory and combining the frequency offset characteristic parameters and the acoustic emission signal characteristic parameters.

According to the double-arc low-stress welding device and method for the high-strength steel structural part, two symmetrically-distributed welding mechanical arms are used for achieving symmetrical welding of welding seams on the two sides of the structural part, a vibration exciter vibrates along with welding in the welding process, and vibration aging is conducted after welding; the vibration pickup display screen can reflect vibration frequency, vibration time and vibration waves, and the ultrasonic stress detector monitors the welding stress state of the structural member in real time; double-arc symmetrical welding enables welding shrinkage to be generated uniformly, and welding deformation is reduced; welding stress and a molten pool can be regulated and controlled in real time along with vibration in the welding process, so that the welding molten pool is in a vibration state, slag inclusion and air hole escape is facilitated, and welding seam forming and organization are optimized; the ultrasonic stress detector monitors the welding stress state of the structural part in real time, quantitative control over the welding process of the structural part is achieved, and the stress state and welding deformation control consistency of the structural part is guaranteed. Welding deformation and welding residual stress can be effectively controlled, heat treatment after welding is not needed, and the component quality is improved.

The invention discloses a dynamic and static testing device and method for a flexible pressure sensor, and relates to the technical field of sensor testing. The dynamic and static testing device for the flexible pressure sensor comprises a bracket, a pressure applying mechanism, a pressure applying head assembly, a pressure applying head support frame, a sample seat and a control system, the pressure applying mechanism outputs air pressure to the pressure applying head assembly through cooperation of the vibration exciter and the air pressure rod, so that a flexible film in the pressure applying head assembly deforms and further provides pressure applying pressure for a to-be-tested sample in contact with the flexible film; controllable electric signals including constants, lines, trigonometric functions or mutual combination are conveyed to the vibration exciter through the control system, and the electric signals can be converted into corresponding pressure waves through the vibration exciter and are applied to the sample to be tested, so that multi-waveform and multi-mode self-defined pressure waves are output to the sample to be tested; and dynamic parameters such as frequency response, resonant frequency and damping ratio of the flexible pressure sensor can be accurately tested.

The invention relates to the technical field of deep ploughing and fertilizing, in particular to a deep crop weeding and fertilizing all-in-one machine which comprises a mounting frame and a plurality of fertilizer conveying pipes, a plurality of supporting shells and elastic supporting mechanisms are arranged at the bottom of the mounting frame, plough shares are hinged into the supporting shells, and the top ends of the plough shares are connected with the elastic supporting mechanisms; the output end of the fertilizer conveying pipe is provided with an electromagnetic pinch valve, the electromagnetic pinch valve is fixed on the back of the supporting shell, the electromagnetic pinch valve is provided with a mechanical closed driving part, and the mechanical closed driving part is linked with the plough share; a vibration exciter is installed on the supporting shell, and a flow valve is arranged on the fertilizer conveying pipe. The ploughing function and the fertilizing function are integrated, and the working efficiency is high; in the ploughing operation process, when the plough share makes contact with and collides with hard obstacles such as stones existing in soil, the plough share is stored in the supporting shell to be buffered, and the damage phenomena such as deformation and breakage of the plough share caused by too large instantaneous impact force can be prevented.

The invention discloses a performance test method and device for a rotor system excited by a vibration table, and belongs to the technical field of rotary mechanical performance test. The test method comprises the following steps: carrying out resonance search on a tested rotor system; carrying out vibration and static / dynamic force loading on the rotor system; measuring performance parameters of the rotor system in a load state; calculating and stripping the relative motion influence of the measured rotor and the displacement sensor bracket, and correcting the radial error motion value of the rotor; establishing a performance state matrix of the rotor system under each working condition; forming rotor system service suggestion parameters; the testing device mainly comprises an electric vibration exciter, the top end of the electric vibration exciter is fixedly connected with a motor, and the output end of the motor is connected with a rotor system. According to the method and the device, active excitation and load loading are carried out on the rotor system under the stable / non-stable working condition, rapid and synchronous testing of rotation errors, thermal elongation, static rigidity and other performance under the load state can be achieved, and guidance is provided for improvement and optimization and service parameter setting of the rotor system.

The invention relates to the technical field of material conveying equipment, in particular to a novel linear vibration exciter feeding machine which comprises a feeding machine frame and a linear vibration exciter installed on the feeding machine frame, the linear vibration exciter comprises two sets of vibration excitation assemblies, and each set of vibration excitation assembly comprises an eccentric vibration excitation shaft arranged in a rotating mode. The right flywheel and the left flywheel are fixedly connected to the two sides of the eccentric excitation shaft and coaxially rotate with the eccentric excitation shaft. And the gears on the left flywheels of the two groups of excitation assemblies are meshed and linked. The motor drives the two excitation assemblies to move synchronously, and the eccentric excitation shafts in the two excitation assemblies are equal in amplitude and opposite in rotating direction, so that the amplitudes of the two excitation assemblies are overlapped in the direction perpendicular to the screen surface and offset in the direction parallel to the screen surface. The scheme has the advantages that the excitation force stability is improved, the amplitude is flexibly adjusted, the equipment reliability is improved, and the service life is prolonged.

A soil compaction device for compacting soil is specified, comprising a vibration exciter device (14) for generating a vibration for soil compaction, in which at least two parameters that influence the vibration generated by the vibration exciter device (14) are variable; a soil compaction measuring device (18) for detecting a compaction state of the soil; and a control device (1, 17) for adjusting at least one of the at least two parameters; wherein the control device (1, 17) is designed to automatically adjust at least one of the at least two variable parameters depending on the detected compaction state and a predetermined set of rules.

The invention discloses a brush wire rigidity detection device for an aero-engine brush seal, belongs to the technical field of aero-engine seal part testing devices, and solves the problem of accurate detection of the brush wire rigidity of the brush seal. Comprising a high-precision annular base (with a sliding rail), a three-axis displacement adjustable sliding block assembly and a bimodal displacement monitoring system composed of a high-speed microscopic vision acquisition module and an infrared laser displacement sensing device. A high-pressure sealed cabin is arranged on the periphery of the base, an intelligent pressure applying mechanism based on the cam-sliding block principle is arranged in the center of the base, a servo motor drives a cam disc to convert rotary motion into high-precision radial displacement, and a force sensing module and a safety gap are integrated to form pressure closed-loop control. The sample fixing device is compatible with samples with different diameters through adjustment of an electrodeless light ring, and a high-frequency vibration exciter simulates a working environment. Force is applied through the pressure applying mechanism, displacement is monitored through the bimodal system, and the rigidity of the brush wire is accurately measured.

The application discloses a pipe jacking construction grouting control method and belongs to the technical field of pipe jacking construction. The purpose is to provide accurate control for the grouting technology in pipe jacking construction. According to the density of stratum, the grouting amount is monitored and controlled in real time through flow meter monitoring and electric switch control. Meanwhile, the grouting holes are arranged along the ring direction on different grouting sections in the pipe jacking direction, so that the grouting can penetrate the whole section, and the wrapping of grouting on the whole pipe jacking section is improved. A plurality of uniformly distributed grouting holes are arranged on the pipe wall of the prefabricated pipe section along the ring direction. A one-way valve is arranged at the outer end of the grouting hole, and a joint for connecting a grouting branch pipe is arranged at the inner end of the grouting hole. A total electromagnetic flow meter, a total electromagnetic pressure gauge and a total electromagnetic ball valve are connected to the grouting main pipe. A branch pipe electromagnetic flow meter, a branch pipe electromagnetic pressure gauge and a branch pipe electromagnetic ball valve are respectively connected to each grouting branch pipe. A plurality of vibration exciters and vibration sensors are fixed on the inner wall of the prefabricated pipe section along the ring direction.

The invention relates to a vibration excitation method and system based on impedance identification, and the method comprises the steps: carrying out the frequency domain conversion of force-speed data obtained by a displacement closed-loop system, and obtaining the mechanical impedance of a drive point; performing flexibility compensation on the mechanical impedance of the driving point to obtain the real impedance of the structure end; extracting an imaginary part and constructing a matching residual error by using the real impedance of the structure end, correcting the excitation frequency of the current vibration exciter through gradient frequency, and iteratively determining the optimal excitation frequency of the vibration exciter meeting a convergence condition; mechanical active power generated by the vibration exciter is calculated under the optimal excitation frequency, dual-target optimization is carried out on the amplitude of the vibration exciter, and the optimal amplitude with the maximum mechanical active power and the minimum equivalent output of the actuator is obtained; based on the real impedance of the structure end, the matching criterion and the optimal amplitude, variable parameters are introduced to construct a source-side impedance model, a source-side impedance matching frequency domain interval is expanded through slow time mark setting parameters, and mechanical active power generated by a vibration exciter is coupled to a tested structure.

The invention discloses a tunnel blasting damage rapid measurement method and system based on a wall-climbing robot, and the method comprises the following steps: S1, laying a three-dimensional optical fiber network, recording the coordinates of each section of optical fiber, and building a mapping relation between an optical fiber node and a space coordinate position; s2, constructing an initial three-dimensional wave velocity model of the tunnel rock mass; s3, correcting the velocity fields of the reflected wave and the winding wave to obtain an optimized wave velocity model; s4, exciting artificial seismic sources at a plurality of positions in the tunnel through a wall-climbing robot with an electromagnetic vibration exciter, and performing data acquisition by a DAS system through an optical fiber network; s5, processing the data acquired in the step S4, carrying out wavelength separation on the reflected wave and the diffracted wave, and respectively carrying out migration imaging on the reflected wave and the diffracted wave after classification; and S6, fusing imaging results of the reflected wave and the diffracted wave through a weight coefficient, and generating a comprehensive geologic model.

The invention discloses a prebaked anode production material conveyor and a control method, and relates to the technical field of prebaked anode production, the prebaked anode production material conveyor comprises a conveyor main body, and the conveyor main body comprises an inner-layer conveying pipe and an outer-layer cooling jacketed pipe coaxially arranged outside the inner-layer conveying pipe; an electromagnetic vibration exciter; the electromagnetic vibration exciter is arranged below the conveyor body and fixedly connected with the inner-layer conveying pipe through a rigid connecting piece, and the feeding module and the discharging module are located at the starting end and the tail end of the conveyor body respectively. The material characteristic identification sensor group is arranged in the feeding module; and the central control system is electrically connected with the material characteristic identification sensor group and the electromagnetic vibration exciter. Safety and environmental protection are guaranteed through a full-sealing structure and an active heat dissipation technology, efficient and general conveying of multi-form materials is achieved through material recognition and self-adaptive vibration control, and continuity and reliability of production are guaranteed in combination with an online self-cleaning system.

The invention discloses a parameter identification test system and method for a tuned mass damping inerter, and the method comprises the steps: generating a signal through a signal generator in a TMDI parameter identification process, converting the signal into mechanical vibration through a vibration exciter after amplification, and enabling the mechanical vibration to act on a main structure equipped with TMDI; a force sensor and a laser displacement sensor are used for obtaining the exciting force borne by the main structure provided with the TMDI and the displacement time sequence under the action of the exciting load; on the basis, based on a mathematical model of the TMDI, seven key parameters including the mass, the rigidity and the damping coefficient of the main structure with the TMDI and the mass, the rigidity, the damping coefficient and the system inertia coefficient of the TMDI are effectively recognized through a global optimization algorithm; the method is accurate in parameter identification, high in identification efficiency and suitable for performance analysis and optimization of various TMDIs.