132 results about "Ambient vibration" patented technology

The invention discloses a road and bridge settlement displacement monitoring system and method based on image detection, and the method comprises the steps: selecting a plurality of static background reference points in a stable background region of a monitoring scene, so as to construct a virtual and stable image internal reference system; furthermore, by accurately tracking image coordinate changes of the background reference points in the initial reference frame and the current frame, a transformation matrix capable of accurately describing disturbance of the camera from the initial pose to the current pose is reversely calculated, and the transformation matrix is applied to observation coordinates of a monitored target point; therefore, the virtual displacement component introduced by the camera disturbance is accurately stripped from the total displacement, and finally the real image displacement generated only by the motion of the structure is obtained. By means of the mode, the system can effectively resist interference of external factors such as environment vibration and temperature change, it is ensured that the height of the finally calculated physical displacement is close to the real settlement value of the structure, and therefore the accuracy and reliability of the monitoring result are greatly improved.

The invention relates to the technical field of industrial laser precision measurement, in particular to a laser centering device for a coupler and a using method of the laser centering device for the coupler. Light spot displacement signals and environment vibration signals are synchronously collected through a laser transmitter and an optical sensor array, and a frequency domain feature decoupling module is adopted to separate a shafting displacement component and an interference component; the time domain correlation verification module is used for calculating signal time sequence correlation and generating a deviation vector, and finally the adaptive compensation decision module is used for analyzing the deviation vector and outputting an adjustment instruction. According to the invention, effective separation of real misalignment and transient noise in a dynamic environment is realized, the technical problem of measurement misalignment of an existing laser centering device in a complex industrial environment is solved, and the coupling installation precision and the equipment operation stability are improved.

The invention relates to the related technical field of survey deviation control, in particular to a displacement deviation control method and system for a vertical point, and the method comprises the steps: deploying a three-axis laser displacement sensor at a target vertical point, collecting displacement deviation data and a vibration spectrum, and generating a deviation feature set; according to the method, key nodes are marked according to a building framework, a displacement compensation vector is configured, a weight coefficient and an action time sequence are corrected based on load mass distribution, and a hydraulic leveling mechanism is driven to perform deviation correction control on displacement deviation of a target vertical point, so that the technical problem that the displacement deviation precision of the building vertical point is insufficient due to the influence of foundation settlement and environmental factors is solved; the technical effects that the displacement deviation is accurately controlled by deploying the high-precision three-axis laser displacement sensor, collecting the displacement deviation data and the environment vibration frequency spectrum in the vertical direction in real time, configuring the displacement compensation vector and dynamically adjusting the weight coefficient, and then the safety and stability of the whole structure are improved are achieved.

The invention relates to the technical field of metal material heat treatment quality detection, in particular to a metal material rapid annealing effect detection method based on acoustic response, which comprises the following steps: step 1, acoustic excitation and synchronous acquisition; step 2, multi-physics field coupling compensation: calculating the phase compensation amount of the vibration signal based on the temperature distribution data and the acoustic characteristic temperature dependence of the material; the method comprises the following steps: acquiring an environment vibration frequency spectrum through a production line mechanical vibration monitoring device, and separating an excitation response component from an original vibration signal by adopting adaptive filtering; 3, annealing sensitive feature extraction; 4, dynamic quality mapping and control: inputting the real-time feature vector into a pre-trained machine learning model, and outputting a recrystallization proportion and a grain size; and when the output parameter exceeds the process threshold value, the control parameter adjustment of the annealing furnace is triggered. Through a non-destructive and accurate acoustic monitoring technology, the annealing effect of the metal material can be efficiently and accurately monitored in a high-speed, high-noise and strong-interference industrial environment.

The invention relates to the technical field of wind turbine generator state monitoring, in particular to a wind turbine generator state monitoring method and system based on multi-source heterogeneous data fusion, and the system comprises a data collection unit, a dynamic noise processing unit, a damage feature analysis unit and a health state output unit. A data acquisition unit synchronously obtains blade strain, unit rotating speed and environment vibration signals through hardware timestamp alignment, and a dynamic noise processing unit removes rotating speed coupling noise by using a two-parameter coupling model, a temperature-pitch angle three-dimensional correction curved surface and closed-loop feedback in combination with variable step blanking and local band elimination protection. The damage feature analysis unit extracts microcrack features by adopting multi-scale wavelet packet decomposition and kurtosis detection, and performs cross validation by fusing a vibration mode confidence factor, and the health state output unit generates a topological graph containing a crack position, an expansion trend and an alarm confidence level, so that the problems of insufficient multi-source data fusion and false and missing judgment of damage are solved, and the safety of the system is improved. And the monitoring precision is improved.

The invention discloses a bridge structure flexibility prediction method and system based on a quality disturbance strategy under natural traffic flow, and the method comprises the steps: arranging a vibration testing environment, carrying out the environment vibration testing of a to-be-predicted bridge structure under sparse and dense traffic flow, and measuring the acceleration response of the to-be-predicted bridge structure; for the acceleration response measured under the sparse traffic flow, identifying the basic modal parameters of the to-be-predicted bridge structure through the CMIF; for the acceleration response measured under the dense traffic flow, adopting a parameter optimization-based variational mode decomposition method to identify the instantaneous frequency of the bridge structure to be predicted; carrying out vehicle-mounted space-time distribution identification according to the acquired traffic flow distribution condition on the bridge floor, calculating the real-time position of a vehicle, and distributing the real-time position of the vehicle to each acceleration sensor by adopting a load equivalent distribution principle to obtain an additional mass matrix; according to the basic modal parameters, the instantaneous frequency and the additional mass matrix, the vibration mode scaling coefficient is calculated, the flexibility is obtained through further calculation, and the method can be widely applied to the flexibility recognition process of structural health detection.

The invention belongs to the technical field of vibration isolation testing, and particularly relates to a method for testing the vibration transmissibility of an autonomous excitation active vibration isolator. The method comprises the steps of excitation signal generation and input, vibration signal acquisition, signal coherence analysis and vibration transmissibility calculation. Due to the fact that ultra-precision equipment is sensitive to environmental vibration, an active vibration isolator is usually needed when the ultra-precision equipment is used, and low-frequency vibration such as ground vibration is isolated. In order to evaluate the vibration isolation performance of the active vibration isolator, the vibration transmissibility of the active vibration isolator needs to be tested and analyzed. According to the test method, an actuator and a sensor of the active vibration isolator are adopted, and an additional excitation device and a test sensor are not needed. The method provided by the invention is simple and convenient to implement, short in time consumption and good in test effect, and can solve the technical problem of testing the vibration transmissibility of the active vibration isolator.

An automotive haptic control system for controlling a haptic output of a haptic actuator of an automobile, the haptic control system comprising: a haptic controller configured to: obtain vibrational information indicative of a level of ambient vibration in an operational environment of the haptic actuator, wherein the operational environment is an automotive environment; determine the level of ambient vibration from the vibrational information; and generate a haptic control signal for use in controlling the haptic output of the haptic actuator, wherein a value of the haptic control signal is a function of the level of ambient vibration.

The invention relates to the technical field of environmental vibration reduction and isolation control, and discloses a vibration isolation pile, a row pile structure and a construction method of the vibration isolation pile, the vibration isolation pile comprises sleeves arranged between a subway tunnel and a basement, at least two sleeves are sequentially nested from outside to inside, and an annular filling space is formed between every two adjacent sleeves; a core filling space is formed in the inner cavity of the innermost sleeve; the annular filling space and the core filling space are divided into a plurality of vibration isolation sections in the height direction of the annular filling space and the core filling space, and each vibration isolation section corresponds to a soft soil layer or a hard soil layer on the outer side; in each vibration isolation section, the annular filling space and the core filling space are each internally provided with a rigid vibration isolation layer or a flexible vibration isolation layer, and the rigid vibration isolation layers and the flexible vibration isolation layers are alternately arranged in the radial direction of the casing pipe. The technical problems that in the prior art, the vibration isolation effect of a vibration isolation pile is the same, vibration isolation cannot be conducted according to vibration propagation characteristics and vibration isolation requirements of different soil layers, and the vibration isolation effect of the vibration isolation pile is poor are solved.

The invention discloses a double-cantilever-beam piezoelectric vibration energy collector based on an annular steady state, which comprises a piezoelectric transducer, an elastic cantilever beam, a magnet and a base, after the piezoelectric transducer is mounted on the elastic cantilever beam to form a double-layer composite cantilever beam, the magnet is mounted at the free end of the double-layer composite cantilever beam, nonlinear coupling is carried out through repulsive magnetic force, and the piezoelectric transducer is connected with the base. The two-dimensional annular potential well structure with the adjustable potential well is formed, and the energy collector can easily trigger large-amplitude inter-well movement through the potential well structure. Through the nonlinear coupling induced internal resonance effect, inter-well energy transfer and two-dimensional potential well modulation are realized, and vibration energy can be efficiently captured in a broadband without a large amount of energy input or a complex structure. According to the design, the collection efficiency of low-frequency, low-intensity and multi-direction environment vibration energy in a wide working bandwidth is good.

The invention relates to a dielectric elastomer-piezoelectric composite multi-source energy collection device for a non-intrusive electric field sensor, and belongs to the technical field of power system self-powered sensors. The device comprises a base, a dielectric elastomer unit, a piezoelectric cantilever beam, a mass block and a rectification energy storage circuit. The dielectric elastomer deforms under the action of an alternating electric field, the piezoelectric cantilever beam is driven through coupling to generate mechanical vibration, and the piezoelectric layer further converts mechanical energy into electric energy to be output. The resonant frequency of the system is adjusted by setting the mass block, so that the resonant frequency is matched with the external electric field frequency or the environment vibration frequency, and the energy conversion efficiency is optimized. The device can collect external electric field energy in a non-intrusive mode and provide a stable power supply required by a low-power-consumption sensor. The device is compact in structure, high in sensitivity and suitable for electric field monitoring in scenes such as ultrahigh-voltage power transmission lines and transformer substations, and provides reliable energy support for self-powered sensors of power equipment.

The invention discloses a holosymmetric four-mass MEMS gyroscope which comprises four sensitive mass block coupling structures which are arranged in a central symmetry manner, and four first U-shaped beams, four n-shaped beams and a cross-shaped coupling structure which are arranged in a central symmetry manner and are connected with the four sensitive mass block coupling structures, compared with the prior art, the four sensitive mass block coupling structures are designed compactly and symmetrically, so that the sensitivity can be effectively improved, and thermally induced drift can be effectively reduced. The driving mode and the working mode are separated through the specific coupling mechanism, so that frequency coupling is avoided, and environmental vibration interference is reduced. And meanwhile, the symmetry of the structure is beneficial to uniform distribution of thermal stress or mechanical stress, so that zero drift caused by temperature change is inhibited.

The invention discloses a high-precision anti-vibration large-aperture mechanical phase-shifting interference measurement method and device, and belongs to the technical field of optical precision measurement. The implementation method comprises the following steps: acquiring a phase shift initial value through a principal component analysis method; calculating background light intensity and modulation degree parameters of the interferogram to obtain an initial value of an iterative algorithm; by establishing an environment vibration error model, the capability of suppressing noise such as measured environment vibration and the like is improved; the iterative linear regression algorithm is combined with the initial estimation of the measured surface shape, and the space and time variables are iteratively solved respectively, so that the response speed and the measurement precision of the system are improved. The method has the advantages of being high in convergence speed and robustness, the initial value of the measured surface shape, the modulation degree and background noise are obtained, the noise model changing along with time is constructed, suppression of environment noise is achieved, and high-precision measurement of the surface shape parameters of the large-aperture optical element is achieved.

The invention relates to the field of intelligent sensing systems, in particular to a power transmission line tower inclination monitoring method, device and system, and the method comprises the steps: collecting a time domain FBG electric signal and a reflection spectrum of a power transmission line tower state through a fiber grating sensor; calculating a first vibration characteristic and a second vibration characteristic of the FBG electric signal, wherein the first vibration characteristic and the second vibration characteristic are used for representing significance of interference of environment time domain vibration and high-frequency vibration on the FBG electric signal; adaptively adjusting the number of decomposition layers according to the vibration characteristics; decomposing the reflectance spectrum through a variational mode decomposition algorithm, and screening IMF components related to the original signal for reconstruction to obtain a denoised reflectance spectrum; and calculating the inclination angle of the tower according to the central wavelength of the denoised reflection spectrum and the measurement data of the fiber grating sensor. According to the invention, the number of decomposition layers is adaptively adjusted according to the interference degree of environment vibration on the current measurement signal, the fiber grating sensor is ensured to obtain the accurate measurement signal, and the accuracy of power transmission line tower inclination monitoring is improved.

The invention relates to the technical field of intelligent manufacturing, in particular to a checking and rejecting device and method under the high-speed condition, and the device comprises a conveying belt, a code reading triggering photoelectric sensor, a depth camera, a code reader, a rejecting assembly, a rejecting detection photoelectric sensor, an encoder and a PLC. The accurate position of the bottle cap is obtained through the depth camera, and the code reader is controlled to be aligned with the bottle cap, so that the accuracy of two-dimensional code reading is ensured; the vibration sensor and the light sensor are introduced to detect the change of environment vibration and illumination intensity, and the sensitivity of the photoelectric sensor and the trigger delay of the rejecting device are dynamically adjusted through the PLC, so that high-precision two-dimensional code verification and accurate rejecting of unqualified products under a high-speed condition are realized, and the production efficiency and the product quality are remarkably improved.

The invention provides a photoacoustic gas measurement method and a photoacoustic gas measurement system based on a series sensibilization technology, and relates to the technical field of optical gas sensing. The first-stage light absorption enhancement structure is used for carrying out maximum photoacoustic conversion on target gas to generate an initial photoacoustic pressure signal, the second-stage acoustic resonance structure is introduced to carry out resonance amplification on sound waves with specific frequency, a tandem cascade sensibilization framework of light absorption enhancement and acoustic resonance amplification is constructed, and through mutual verification analysis, the sensitivity of the target gas is improved. Calculating coherence outside preset noise analysis frequency band data, identifying and inhibiting common-mode noise interference caused by environment vibration and the like, generating feedback control parameters while calculating final gas concentration, adaptively adjusting intensity modulation frequency and wavelength modulation depth, and realizing high-precision and high-precision measurement. The measurement reliability, the dynamic range and the adaptive capacity of the system under complex working conditions are improved, and multiplier-level breakthrough of the sensitivity of the system and collaborative optimization of the performance are achieved.

According to the high-bearing-capacity polyurethane waterproof composite anti-vibration pad for the building and the construction method of the high-bearing-capacity polyurethane waterproof composite anti-vibration pad for the building and the construction method of the high-bearing-capacity polyurethane waterproof composite anti-vibration pad for the building, an upper waterproof layer, a lower waterproof layer and an elastic layer are matched and bonded into a whole, and all waterproof composite anti-vibration pads are bonded into a whole in a buckling and pressing lap joint mode; according to the utility model, the adverse effects of environmental vibration and underground water on sensitive buildings are eliminated, so that the adverse effects of vibration on normal work and life of people are weakened, the product is simple in structure, reliable in quality and simple in construction through factory-like standard production, traditional three construction procedures are reduced to one procedure, and the production cost is reduced. The method can greatly improve the field construction efficiency and construction quality, is suitable for vibration isolation and water prevention of foundations of all building types, and is convenient to construct and wide in engineering application prospect.

The application provides a filtering optimization method and system for an inertial measurement unit fiber-optic gyroscope. The three-dimensional vibration signal of the inertial measurement unit fiber-optic gyroscope is collected, and the vibration modal characteristic data is generated through short-time Fourier transform. The magnetic field strength of the gyroscope is dynamically adjusted according to the data, and the environmental vibration energy is converted into current data based on the adjusted magnetic field strength. The original angular velocity data output by the gyroscope is combined, a double-channel convolutional neural network is used to extract first and second noise features from the current data and the original angular velocity data respectively, and preliminary denoising data is output after fusion. The preliminary denoising data is subjected to variational modal decomposition, and the effective modal components are selected according to a preset kurtosis rule to obtain target angular velocity data, which is used to realize filtering optimization of the gyroscope. The technical scheme provided by the application improves the measurement accuracy and filtering optimization effect of the inertial measurement unit fiber-optic gyroscope.

The invention belongs to the technical field of survey and measurement, and particularly relates to a total station for diversion engineering tunnel construction, the total station comprises a total station body, the lower end of the total station body is symmetrically and fixedly connected with two supporting plates, the lower ends of the two supporting plates are fixedly connected with the same annular bearing plate, and the annular bearing plate is fixedly connected with the lower end of the total station body. The device further comprises a multi-stage anti-shake mechanism, a machine body posture locking mechanism, an air curtain forming protection mechanism, an anti-vibration sealing enhancement mechanism, a three-axis acceleration sensor and an environment vibration standard indicating lamp. Direct transmission of construction environment vibration to the total station can be effectively blocked, the damping strength of the multi-stage anti-shake mechanism and the sealing strength of the lens are adaptively regulated and controlled according to the real-time vibration strength, the proper measurement time period is visually prompted through the indicator lamp, the total station can be limited and fixed during measurement, a conical air curtain protection layer can be automatically formed, and the measurement efficiency is improved. The adverse effects caused by vibration damage and dust attachment are avoided, and the measurement precision and the equipment operation stability are comprehensively guaranteed.

The present application relates to the field of mechanical equipment fault diagnosis and vibration signal processing, and in particular to a tunnel boring machine main bearing fault detection method based on blind relative transfer matrix estimation. The method comprises: collecting target vibration signals of target measuring points near the main bearing and reference vibration signals away from the main bearing fault source; pre-processing and segmenting the multi-channel vibration signals; calculating the kurtosis of each signal segment and screening noise dominant signal segments; according to the noise dominant signal segments, using a least square method with a regularization term to estimate the relative transfer matrix between the reference sensor array and the target sensor array; using the relative transfer matrix and the reference vibration signals to reconstruct the relevant background vibration at the target measuring points, and subtracting the relevant background vibration from the target vibration signals to obtain an enhanced fault signal; performing structure resonance band constraint, envelope demodulation and envelope spectrum analysis on the enhanced fault signal, and completing main bearing fault detection according to the fault characteristic frequency and its harmonics. The present application can suppress strong correlated environmental vibration, reduce the interference of fault impact on transfer model estimation, and improve the visibility of weak fault characteristics of the tunnel boring machine main bearing under the conditions of ultra-low speed, heavy load and low signal-to-noise ratio.

Method for determining a static bending stiffness (C B,stat ) of an object (1) which is vibrationally decoupled from an environment and arranged on at least two support means (2, 3), from dynamic acceleration measurements after vibration excitation of the object (1), comprising the steps a) Establishing a plurality of force application points (4) on the object (1), b) Arranging a number of accelerometer means (5) on the object (1), c) Exciting the object (1) at the force application points (4) determined in step a) using vibration generating means and determining a number of frequency response functions from the accelerations measured using the acceleration sensor means (5), d) Calculating an acceleration vector of the object (1) from the frequency response functions obtained in step c), e) Calculating a displacement vector from the acceleration vector determined in step d), f) Calculating a number of dynamic bending stiffness curves from the forces acting at the force application points (4) and the deflections of the object (1) induced by the displacements with the displacement vector, g) Extrapolating at least one of the dynamic bending stiffness curves obtained in step f) to a frequency f=0 Hz to obtain the static bending stiffness (C B,stat ) of the object (1).

The invention relates to the technical field of intelligent lighting, and discloses a mirror surface lamp control system and control method based on knock recognition, and the method comprises the steps: obtaining a knock signal of a sensor assembly, and carrying out the preprocessing of the knock signal, and determining a target knock signal, based on rationality of environment vibration and signal feedback of a sensor assembly, knocking characteristics of a target knocking signal are extracted, use data of the mirror surface lamp are acquired, a light multiplexing strategy or a light knocking strategy is judged and executed based on the knocking characteristics, and a working mode of the mirror surface lamp is determined based on knocking time and knocking times. And mirror surface index data of each mirror surface detection area is obtained based on the sensor assembly, mirror surface light symbols are generated for each mirror surface detection area based on all the mirror surface index data, the symbol number of the mirror surface light symbols is counted, and the brightness of the mirror surface lamp is determined based on the symbol number and the light mapping model. According to the invention, the stability and reliability of mirror surface lamp control are ensured.

The embodiment of the application discloses a cube satellite turnover device, and relates to the technical field of satellite posture adjustment, which comprises a turnover frame, a turnover driving mechanism, a vibration sensor and a control assembly. The vibration sensor is used for collecting vibration information of an external environment and sending the vibration information to the control assembly. The control assembly is used for controlling the turnover driving mechanism to be locked according to the received vibration information. The cube satellite is carried by the turnover frame, and the vibration sensor is further arranged on the turnover frame to monitor the vibration of the external environment. Since the vibration sensor and the turnover driving mechanism are respectively connected with the control assembly in signal, the control assembly can control the turnover driving mechanism to be locked according to the collected vibration information, and then the turnover frame connected with the turnover driving mechanism in transmission is also locked, the working of the turnover driving mechanism is stopped, and the turnover posture adjustment of the cube satellite is prevented from continuing under the interference of external force or external environment vibration, so that the safety of the cube satellite is effectively ensured.

This invention relates to the field of optical experimental equipment technology, and particularly to an optical experimental turntable, comprising a base, a rotary worktable mounted on the base, and a drive module disposed on one side of the rotary worktable; the optical experimental turntable also includes an aperture adjustment unit, which is disposed at the upper end of the rotary worktable and used to change the aperture of the light-gathering hole on the rotary worktable. The buffer unit used in this invention can perform two-stage vibration reduction; the vibration damping medium within the buffer frame can release the vibration kinetic energy transmitted by the base through its own vibration, significantly reducing the vibration transmission path. Combined with the elastic buffering effect of the buffer spring, it effectively isolates the interference of external environmental vibration and the vibration of the equipment itself on the optical path.

The invention discloses an anti-vibration pose compensation support and vision measurement equipment, and relates to the technical field of structure monitoring equipment, the anti-vibration pose compensation support comprises a supporting structure, a motion pose measurement mechanism and a motion compensation mechanism, the supporting structure comprises a base and an outer ring frame, an inner ring frame is arranged in the outer ring frame, and a workbench is arranged in the inner ring frame; the moving posture measuring mechanism detects the position change of the base; a first driving assembly of the motion compensation mechanism drives the outer ring frame to move, a second driving assembly drives the inner ring frame to move, and a third driving assembly drives the workbench to move. Kinematics parameters of the supporting structure are collected in real time through the motion posture measuring mechanism, six-degree-of-freedom posture adjustment is achieved through the motion compensation mechanism, posture deviation of the supporting structure is adjusted, environment disturbance is dynamically compensated, it is ensured that the posture of the vision measuring instrument is constant, disturbance influences of factors such as wind loads and environment vibration on the vision measuring instrument are avoided, and the measurement accuracy is improved. The problem that the measurement precision of the vision measurement instrument is reduced due to vibration in a complex environment is solved.

The invention relates to the technical field of artificial intelligence and signal processing, and provides a drilling and tapping machine fault recognition method and device.A first vibration sensor is arranged on a drilling and tapping machine, and a second vibration sensor is arranged at an environment vibration signal collection position. Environmental vibration noise is effectively suppressed, the signal-to-noise ratio is remarkably improved, and the fault recognition accuracy of the drilling and tapping machine is improved. The non-stationary fault impact is visualized by using continuous wavelet transform, and the local time-frequency texture of the non-stationary fault impact is automatically learned by using a two-dimensional convolutional neural network, so that a rough threshold is upgraded to fine classification, and the accuracy of fault recognition is improved. According to the method, automatic fault identification of the drilling and tapping machine is realized based on the vibration signal, the fault type is identified, and the identification accuracy is improved.

An inertial sensor such as a MEMS accelerometer or gyroscope has a proof mass that is driven by a self-test signal, with the response of the proof mass to the self-test signal being used to determine whether the sensor is within specification. The self-test signal is provided as a non-periodic self-test pattern that does not correlate with noise such as environmental vibrations that are also experienced by the proof mass during the self-test procedure. The sense output signal corresponding to the proof mass is correlated with the non-periodic self-test signal, such that an output correlation value corresponds only to the proof mass response to the applied self-test signal.

The invention discloses a sensor-based plate thickness adaptive adjustment system, which comprises a multi-source sensing fusion acquisition module, a dynamic parameter adjustment calculation module and a closed-loop feedback execution module. The multi-source sensing fusion acquisition module comprises a laser displacement sensor, a vibration sensor, a temperature sensor and a tool wear sensor which are respectively used for acquiring a plate thickness original signal, a processing environment vibration signal, a processing area environment temperature signal and a tool accumulated wear loss signal; the dynamic parameter adjustment calculation module receives the signal and calculates a machining parameter adjustment instruction; the closed-loop feedback execution module comprises a servo controller and an execution mechanism, and the execution mechanism adjusts the machining action under the control of the servo controller. According to the system, the problems of inaccurate thickness measurement and parameter adjustment lag caused by multi-factor interference in the prior art are solved, and the plate processing quality and consistency are improved.

The present application belongs to the field of vibration power generation. It relates to a vibration pickup component for vibration power generator, which is composed of a square frame, a support, a vibrator swinging around a point above the center of gravity, and a anti-dropping assembly. It mainly plays the role of expanding the frequency band and picking up low vibration energy. It also relates to a vibration pickup device for electromagnetic vibration power generator and a vibration pickup device for composite vibration power generator, which are both composed of a vibration pickup component and a gimbals. Both of them can make the vibration pickup component pick up the omnidirectional external excitation. The latter also produces multiple types of feedback actions for various power generation units. It also relates to an electromagnetic vibration power generator and a composite vibration power generator. The former is composed of a vibration pickup device for electromagnetic vibration power generator, a permanent magnet, etc. The latter is composed of a vibration pickup device for composite vibration power generator, a permanent magnet, a piezoelectric and friction power generation unit, a wheel disc type friction nano power generation unit, etc. Both of them improve the power generation efficiency of picking up environmental vibration energy.