65 results about "Ground vibrations" patented technology

The application relates to the technical field of ring network boxes, and discloses a primary and secondary fusion ring network box which comprises a box body and a box door, the box door is rotationally connected to the box body, a plurality of supporting strips are arranged on the box body, supporting rods are rotationally connected to the supporting strips, rotating wheels are fixedly connected to the supporting rods, and a fixing structure is arranged on the box body and used for fixing the box body. The rotating wheels are fixedly connected to the supporting rods, the rotating wheels can drive the box body to rotate, the box body can be dismounted from the cabinet by a worker, the ring network box can be taken out from the cabinet, and the ring network box can be maintained and processed. Meanwhile, the fixing structure fixes the box body, the box body is not prone to sliding in the cabinet, and the situation that the box body shakes due to ground vibration is reduced.

The invention provides an anti-impact six-degree-of-freedom quasi-zero stiffness vibration isolation platform which comprises a first-stage vibration isolation layer and a second-stage vibration isolation layer and is characterized in that the first-stage vibration isolation layer is composed of four self-adaptive quasi-zero stiffness vibration isolation systems and used for supporting a panel and isolating vibration from equipment or the ground; the second-stage vibration isolation layer is composed of four active vibration isolation systems and used for further attenuating residual vibration and restraining internal motion disturbance of equipment. According to the quasi-zero-stiffness vibration isolator, the core problem that a traditional quasi-zero-stiffness vibration isolator cannot adapt to dynamic load changes and the anti-impact requirement is solved, a high-reliability and ultra-quiet environment is provided for high-end precision manufacturing, six-degree-of-freedom vibration control can be achieved, a vibration isolation belt is wider, vibration isolation of a 0.1-500 Hz vibration source can be achieved, the bearing capacity is large, the 20000 kg bearing requirement can be met, and the quasi-zero-stiffness vibration isolator is suitable for large-scale popularization and application. The device can adapt to precise instruments of different models, and is wide in application range and high in universality.

This invention relates to the field of water conservancy engineering construction technology, and discloses a method and system for controlling blasting vibration during lock excavation. By collecting information on the geological hardness of rock strata and the distance to surrounding buildings, and combining this with finite element analysis to simulate the blasting energy distribution, a dynamic matching mechanism for borehole depth and charge quantity is constructed. This method overcomes the limitations of traditional empirical parameter settings and uses iterative simulation and optimization algorithms to achieve coordinated adjustment of borehole depth and charge quantity. For example, in areas with high rock hardness, by increasing the borehole depth and matching a segmented charge strategy, the blasting energy is uniformly released in the deep rock mass, effectively reducing the peak ground vibration and avoiding structural damage to adjacent buildings. Furthermore, by introducing multi-dimensional data analysis and multi-scenario simulation verification mechanisms, it can flexibly cope with complex working conditions such as uneven rock hardness, topographical undulations, adjacent water bodies, or dense building clusters.

The application discloses a spraying robot laser radar inertia tight coupling positioning method based on IMU vibration spectrum sensing, comprising the following steps: 1) collecting IMU original data and preprocessing, and constructing a multi-dimensional standardized ground vibration fingerprint; 2) receiving the output multi-dimensional standardized ground vibration fingerprint, and realizing integrated decision of ground state sensing and positioning risk assessment; 3) according to the output decision triple, dynamically matching a pre-established multi-dimensional mapping library of “ground type-vibration interference level-treatment strategy”; 4) fusing the output point cloud without vibration noise and distortion and IMU pre-integration data, realizing adaptive tight coupling state optimization, and outputting pose estimation residual error; 5) based on the output pose estimation residual error, evaluating the mismatch degree of the current positioning system parameters and the environment, and realizing full-link closed-loop adaptive optimization. The application realizes integrated decision of ground type identification and positioning risk, and solves the problem that ground sensing and positioning decision are disconnected.

The application provides a kind of aircraft servo elastic dynamics model correction method considering operating surface gap, first aircraft structure is divided into substructure, and the aircraft dynamics model containing aileron gap nonlinearity is established according to substructure branch modal;And additional inertia force caused by aircraft operating aileron deflection is introduced in dynamics model, and the aircraft open-loop servo elastic motion equation containing aileron gap nonlinearity under independent generalized coordinate is obtained;According to sensor output equation, rudder transfer function and flight control system equation, the aircraft nonlinear servo elastic closed-loop system model containing aileron gap nonlinearity is established, and the model is corrected based on ground vibration test, rudder frequency response test and gap measurement test result, and the stability of the model is judged based on simulation analysis result and open-loop frequency response test result and is further corrected, which improves the accuracy of gap nonlinearity aircraft aerodynamic servo elastic characteristic evaluation, and is helpful to guide aircraft servo elastic ground test engineering practice.

The invention relates to the technical field of ground vibration prevention, and discloses a steel plate and base combined micro-vibration prevention base which is of an up-down composite laminated structure and comprises a stainless steel panel layer and a concrete base layer from top to bottom. The stainless steel panel layer and the concrete base layer are rigidly connected through an anchoring system pre-buried in concrete to form an integral stress unit; and the upper surface of the stainless steel panel layer is constructed into an integrated composite functional surface comprising a plurality of mounting planes with different heights. The stainless steel panel is used for replacing a traditional epoxy self-leveling coating to serve as an equipment installation face, stainless steel materials are high in inherent rigidity and good in toughness, intrinsic brittleness of epoxy materials is avoided, and the risk of brittle cracking of the surface due to loads or temperature difference or impact is fundamentally eliminated.

This invention provides a vibration-damping and noise-reducing track structure for RGV (Remotely Resistant Vehicle). The RGV vibration-damping and noise-reducing track structure includes: a vibration-damping base; two tracks, which are mounted on top of the vibration-damping base via multiple sets of fixing brackets. Each set of fixing brackets has fixing bolts installed on its top. The vibration-damping base includes a support structure, a vibration-damping structure, and a wear-resistant structure. The wear-resistant structure is installed between the support structure and the wear-resistant structure, and the vibration-damping structure is a rubber damping pad; filling openings are located at both ends of the tracks, and the interior of the filling openings is filled with a filling structure, which is made of foam plastic. Each track has a sliding opening on its top. The vibration-damping and noise-reducing track structure for RGV provided by this invention can effectively isolate vibration transmission between the track and the foundation, reducing ground vibration and noise propagation, reducing ground vibration amplitude by 30%-40%. Simultaneously, the filling structure can absorb noise, improving the noise reduction effect.

The invention relates to the technical field of seven-stringed plucked instrument auxiliary devices, in particular to a novel seven-stringed plucked instrument base which comprises a base plate, brass foot assemblies are fixedly installed at the four corners of the bottom of the base plate, a plucked instrument body base is placed at the top of the base plate, each brass foot assembly comprises an installation sleeve, and a supporting base is installed at the bottom of each installation sleeve in a threaded mode. A connecting base is installed at the bottom of the supporting base in a threaded mode, a vibration isolation pad is embedded in the bottom of the connecting base, and an inner cavity of the bottom of the installation sleeve is provided with an inner thread. According to the supporting structure of the high-purity brass foot, on one hand, vibration coupling with the guqin is avoided through stable own frequency, on the other hand, the contact area between the guqin body base and the ground is reduced, transmission of ground vibration to the base is reduced, external interference is further reduced, and meanwhile the brass foot meeting the vibration isolation requirement can be selected in different ground scenes; ground vibration is prevented from reversely interfering with Guqin vibration, and the application scene of the base is further widened.

This invention belongs to the field of structural dynamics testing and modal analysis technology, and provides a physical / mathematical integrated experimental modal analysis method, system, equipment, and medium. The method includes: applying preliminary excitation and using the phase separation method to obtain preliminary modal parameters containing mode shapes; constructing a mode shape matrix based on the mode shapes and optimizing the position and number of exciters to ensure that the modal participation values ​​of all modes of interest are not lower than a preset threshold; performing refined excitation according to the optimized scheme, locking the resonance state using the phase resonance method, and obtaining the final modal parameters. This invention effectively solves the problems of blind excitation point placement, modal confusion, and mode omission by coordinating three stages: phase separation initial screening, mode shape-driven excitation optimization, and phase resonance fine measurement. It significantly improves the integrity, accuracy, and efficiency of modal testing of large structures and reduces experimental safety risks. It is applicable to ground vibration tests of complex structures such as aircraft, spacecraft, and bridges.

The invention discloses a vibration drift removal and compensation method for atom interference measurement, which sequentially comprises the following steps of: carrying out atom interference continuous measurement, acquiring a voltage signal by an accelerometer, enabling the voltage signal to pass through a band-pass filter circuit, acquiring the voltage signal by a main control system, converting the voltage signal into an acceleration signal, and converting the acceleration signal into a vibration phase. The acceleration signal average value is converted into a vibration phase, vibration phase linear fitting, interference measurement period vibration phase drift removal and interference fringe fitting are carried out to obtain an interference phase, and the interference phase calculates a measured physical quantity; according to the method, data processing such as filtering, smoothing, linear fitting and deduction is carried out on signals collected by the accelerometer, suppression of time drift and temperature drift existing in relative acceleration measurement of the accelerometer is achieved, and measurement noise introduced by ground vibration is greatly reduced.

The invention relates to the technical field of vibration resistance and shock absorption, and discloses a double-strong-electromagnetism vibration-resistant guide rail which comprises a first resuspension device, an electromagnetic guide rail base, a second resuspension device and a carrying module. The inner enveloping electromagnetic plate of the first re-suspension device suspends under the electromagnetic action of the outer enveloping electromagnetic plate; the inner enveloping electromagnetic plate is fixedly connected with the electromagnetic guide rail base; second resuspension devices are fixedly arranged in limiting grooves in the two sides of the electromagnetic guide rail base, and the permanent magnet plate of the carrying module is arranged above the second resuspension devices. A dual electromagnetic quakeproof system is adopted and comprises the first resuspension device and the second resuspension device which enable the electromagnetic guide rail base and the carrying module to suspend correspondingly, and therefore ground vibration and operation vibration borne by the guide rail are reduced; the influence of the object temperature on the track groove is calculated through light deflection, the temperature is corrected through the liquid cooling disc, the deformation degree of the track is guaranteed, and the high-precision effect is further achieved.

The full-aircraft ground vibration test method based on virtual-real fusion is suitable for the detection of the overall vibration performance of an aircraft, and comprises the following steps: determining an optimal initial excitation force which is determined by inputting a plurality of virtual results into an excitation vibration force vector model, the virtual result is determined according to a test model established by the test aircraft; and synchronously performing a virtual test and a real physical test on the basis of the optimal initial excitation force, obtaining a structural frequency spectrum and a result model of the real physical test, determining initial modals of each order of the aircraft according to the structural frequency spectrum, optimizing or correcting a dynamic simulation model through the initial modals of each order, and obtaining a dynamic simulation result of the aircraft. According to the method, a real dynamic simulation model is determined, the real dynamic simulation model is optimized or corrected according to a result model to obtain a final dynamic simulation model, and the final dynamic simulation model is stored, so that the test efficiency is improved.

The utility model discloses a kind of coating equipment protection structure and coating equipment, it is related to coating technology field.The coating equipment protection structure includes clean cover and flexible connecting piece, clean cover ring is set to the outside of the equipment ontology of coating equipment, flexible connecting piece is ringed between equipment ontology and clean cover, clean cover is connected with the outside wall of equipment ontology by flexible connecting piece and is circumferentially sealed.The coating equipment protection structure provided in the utility model embodiment can realize effective isolation to coating area, and also can prevent ground vibration from being transmitted to equipment ontology, obtain better coating effect.

The utility model discloses a shockproof connecting piece for a curtain wall, which comprises a sleeve, the rear side of the sleeve is fixedly connected with a rear connecting piece, the inside of the sleeve is movably connected with a guide post, the rear side of the guide post is fixedly connected with a moving plate, and the surface of the moving plate is in contact fit with the inner wall of the sleeve; the surface of the guide column is sleeved with a limiting structure, and the top of the limiting structure penetrates through the sleeve and extends to the top of the sleeve. Through cooperative use of a sleeve, a rear connecting piece, a guide column, a movable plate, a front connecting piece, a mounting hole, a lantern ring, a screw rod, a movable sleeve, a sinking groove, a nut, an opening, a limiting groove, a limiting block, a first reset spring, a second reset spring and a limiting ring, the problem that in the using process of an existing curtain wall connecting piece, when an earthquake occurs or vibrates, ground vibration can be transmitted to a building, and the building is damaged is solved. The problem that the curtain wall is separated from the wall body due to the fact that the building structure shakes and deforms to a certain degree due to earthquakes is solved.

The invention provides a sky-ground integrated cultural relic safety monitoring method and system, and relates to the technical field of cultural relic safety monitoring, and the method comprises the steps: obtaining radar and unmanned plane image data of a target ruin in different time periods and ground vibration data of a collection device in a region, and building ground surface reference parameters through combining geological survey and meteorological data; comparing radar images to identify earth surface change information, and generating an earth surface difference chart marked with the deviation value of each geographic position according to the deviation degree of the earth surface change information and the reference parameters; for key positions meeting a preset deviation value in the image, corresponding unmanned aerial vehicle image slices are extracted, visual feature vectors are obtained through multi-scale texture decomposition and color space conversion, a risk index is calculated by combining ground vibration data space-time correlation analysis, and an alarm is generated if illegal activities exist. Accurate monitoring and rapid warning of illegal activities of cultural relics and ruins can be realized.

The invention discloses an environmental protection monitoring analysis method and system based on the Internet of Things, and relates to the technical field of environmental protection monitoring, and the method not only collects air particulate matter concentration data, but also identifies whether particulate matters in air are deviated to coarse particles or not by performing particle size distribution fitting on the air particulate matter concentration data and calculating a particle size spectrum skewness factor Skp. Ground vibration data are combined, and integration is carried out in a typical frequency band range of the agricultural machine to obtain vibration coupling energy Iv; and the platform presets a vibration energy threshold value Ith, the vibration coupling energy Iv is compared with the vibration energy threshold value Ith, and the type of the pollution source is determined. When the vibration coupling energy Iv is higher than the vibration energy threshold value Ith, the flying dust is caused by mechanical disturbance; when the vibration coupling energy Iv is smaller than or equal to the vibration energy threshold value Ith, it is judged that the flying dust is natural wind flying dust. The conjoint analysis method breaks through the limitation that an existing system can only output particulate matter concentration values, and pollution sources are distinguished.

The invention discloses a train positioning system and method. The system comprises a multi-source active positioning device used for acquiring first train position data based on a first positioning mode and second train position data based on a specific positioning system; the ground vibration detection equipment serves as section occupation detection equipment and is used for acquiring and transmitting third train position data; the ground vibration detection equipment and the vehicle-mounted controller establish a vehicle-ground decoupling communication link; and the automatic train protection system is used for realizing active calculation of train positions and continuous maintenance of a positioning state based on switched effective information sources by performing priority-configurable multi-information-source autonomous switching among the first train position data, the second train position data and the third train position data. The system can improve the vehicle-mounted positioning reliability, unify the ground positioning precision, and improve the line resource utilization rate.

A construction method for vibration isolation through a freezing method comprises the following steps that S1, an underground freezing barrier is formed in foundation soil between a preset collapse area of a building to be blasted and a protected building in a manual refrigeration mode; and S2, after the integrity and strength of the freezing barrier are confirmed, directional blasting is conducted on the building to be blasted. An ice-soil mixture formed by freezing has the characteristics of high strength and high damping and can effectively reflect, scatter and absorb vibration waves, and the damping effect is remarkably superior to that of a traditional damping ditch and a traditional buffering dike. The method is not limited by unfavorable geological conditions such as underground water and complex stratums, and is particularly suitable for working conditions such as soft soil and water-rich stratums where deep ditches are difficult to excavate. The construction process is free of pollution, the barrier is naturally melted after blasting, the land recovers to the original shape, construction waste is not generated, and the influence on the ecological environment of the site is extremely small.

The invention discloses a shallow gas storage injection-production and ground vibration double-disturbance stability evaluation method and device and a storage medium. The method specifically comprises the following steps: establishing a gas storage injection-production and ground vibration double-disturbance risk area refined geomechanical model; establishing a gas storage risk area numerical simulation and prediction model; establishing a gas storage stability monitoring system under disturbance; establishing a gas storage double-disturbance stability comprehensive dynamic evaluation system; on the basis of a refined geomechanical model of a gas storage risk area, a numerical simulation prediction model and a monitoring system are combined, corresponding simulation result evaluation standards and monitoring result evaluation standards are established respectively, and stability safety evaluation of a target gas storage is achieved. Related personnel can be reminded to take adjustment measures in time, and safe operation of the gas storage is ensured. According to the method, the vacancy of a gas storage stability evaluation system under the influence of double disturbances at present can be made up, and the effect of safety control of gas storage operation can be well achieved.

The application discloses a shock-absorbing and noise-reducing device for breast imaging CT, relates to the technical field of breast imaging, and comprises a mounting base, a CT mounting assembly is fixedly installed at the middle of the top of the mounting base, and the CT mounting assembly comprises a rotary support and a mounting frame. The shock-absorbing pad can prevent the vibration of the mounting frame and the breast imaging CT from being transmitted to the scanning bed through the metal support, thereby protecting the comfort of the patient, reducing the imaging noise and motion tail shadow of the breast imaging CT, and making the imaging picture clearer. The shock-absorbing pad can isolate the ground vibration, ensure the stability of the scanning bed body, avoid the scanning bed body from generating weak vibration due to the ground vibration, and further enable the scanning bed body to be more stable, so that the breast of the patient lying on the scanning bed body can be kept stable. The shock-absorbing pad can play a certain adjusting role in the case that the ground of the hospital is uneven, help the scanning bed body keep stable, and avoid the inclination or shaking caused by the ground problem.

The invention relates to the field of vibration test fixtures, and discloses a full-envelope modular vibration test fixture based on interface boundary simulation, which comprises a fixture base and a top cover which are detachably connected and jointly form a mounting inner cavity, the elastic bag system is arranged in the mounting inner cavity and used for wrapping and being attached to the side surface of the product after being filled with fluid, and the pressure of the fluid in the elastic bag system is adjustable so as to dynamically simulate the distribution boundary pressure acting on the side surface of the product; the front baffle ring and the rear baffle ring are adjustably connected to the clamp base and / or the top cover and used for covering and pressing the front end face and the rear end face of the product so as to simulate boundary pressure acting on the end faces of the product. The method has the beneficial effect that the equivalence of a ground vibration test and a real flight environment in load transmission paths and structural excitation characteristics is improved.

The invention discloses a drag-free control ground verification method based on active control of two-stage torsional pendulum, which comprises the following steps of: suppressing the influence of ground vibration noise on free motion of a test mass in an inertial space to be below 10% of the original noise, and constructing a local inertial reference at the test mass; the problem that inertial space motion is difficult to simulate on the ground by a traditional method is effectively solved; secondly, a high-precision numerical model and a six-degree-of-freedom displacement platform are combined through a hybrid real-time simulation technology, and the high-fidelity on-orbit dynamics simulation capability is achieved. The experimental device has relatively high space-ground consistency, can realize ground high-precision representation of an on-orbit drag-free tracking process of a spacecraft, and provides a new solution thought for ground verification of a space drag-free task. In addition, compared with a complex dynamic equivalent system constructed on the ground, the solution provided by the invention has the characteristics of being easy to implement and low in complexity.

The utility model relates to the technical field of physical exploration, and discloses a tunnel advanced geological forecast elastic wave method seismic source excitation device which comprises a bearing shell, the top of the bearing shell is fixedly connected with a first telescopic column, the top of the first telescopic column is in sliding connection with a second telescopic column, an excitation mechanism is arranged in the bearing shell, and the top of the second telescopic column is in sliding connection with a second telescopic column. A plurality of fixing assemblies are fixedly connected to the outer wall of the second telescopic column, a detection assembly is fixedly connected to the left side of the fixing assembly on the left side, a lifting mechanism is fixedly connected to the interior of the first telescopic column, and the lifting mechanism is used for adjusting the length of the device, so that the device better adapts to the geological environment. According to the utility model, the motor in the shell is started, the top rotating shaft and the triangular plate are rotated, the iron ball is knocked to produce sound, the sound amplification assembly amplifies sound, the long column is fixed on the ground, the vibration sensor detects amplitude and frequency, data are uploaded to the master controller for a user to check, subsequent operation is facilitated, and user requirements are met.

The invention discloses a mountain photovoltaic pile foundation guide hole construction method based on real-time attitude control, and particularly relates to the technical field of pile foundation construction control, which comprises the following steps: acquiring a roll angle, a pitch angle and a course angle of construction equipment, collecting ground vibration frequency information, constructing a virtual reference attitude plane as an external reference, and constructing a real-time attitude control model; by comparing attitude data, ground vibration data and a reference plane change trend, an interference source is judged to be equipment vibration, foundation deformation or sensor errors, a filtering algorithm is switched according to different interference types, control response is adjusted or operation is paused, and therefore stable control and equipment protection in the drilling direction are achieved. According to the method, the attitude data and the ground vibration frequency information are collected in real time, the virtual reference attitude plane is constructed, the change trend of the three types of data is jointly analyzed, the interference source is accurately recognized, the attitude control strategy is dynamically adjusted accordingly, the drilling direction precision and the construction stability are improved, and the structure fatigue and error compensation risk is reduced.

The application provides a sky-ground integrated cultural relic safety monitoring method and system, relates to the technical field of cultural relic safety monitoring, and establishes a ground surface reference parameter by acquiring radar, unmanned aerial vehicle image data and ground vibration data of an acquisition device in a region of a target site at different time periods, combining geological exploration and meteorological data; compares the radar image to identify ground surface change information, generates a ground surface difference map marked with deviation values of each geographical position according to the deviation degree of the ground surface change information from the reference parameter; for key positions in the map that meet a preset deviation value, extracts corresponding unmanned aerial vehicle image slices, obtains visual feature vectors through multi-scale texture decomposition and color space conversion, combines ground vibration data to perform spatiotemporal correlation analysis and calculate a risk index, and determines that there is a violation activity to generate an alarm, so that accurate monitoring and rapid alarm of a violation activity of a cultural relic site can be realized.

The application provides a seismic monitoring system and method based on capacitive sensing and electrostatic driving technology, which comprises a base, an adjusting platform, a front-end electronic system, a protective shell, a sensitive device and an upper computer; the base is fixed on the ground; the protective shell is fixed on the base and covers the base; the adjusting platform is arranged on the upper part of the base; the sensitive device is arranged on the upper part of the adjusting platform and comprises a test mass and an electrode cage; the test mass is fixed on the protective shell through a metal filament, and the metal filament is connected with the front-end electronic system; the electrode cage is fixed on the adjusting platform and is internally provided with electrodes; the front-end electronic system is installed on the side wall of the protective shell, is connected with the upper computer through an upper computer interface and communicates with the upper computer, is connected with an external power supply through a power supply interface, and is connected with the electrodes and the metal filament through a circuit interface. Through high-precision and high-sensitivity position detection and real-time electrostatic driving control, the application realizes real-time measurement of ground vibration information.

The application provides a near-field longitudinal wave velocity inversion method of a railway periodic bridge structure. The method comprises the following steps: constructing a vehicle-bridge-foundation dynamic interaction model according to railway parameters, periodic bridge structure parameters, track irregularity parameters and site soil parameters; theoretically analyzing the vibration response of the railway periodic bridge structure in the near-field foundation soil by using the model, and calculating the theoretical value of the ground vibration velocity response; performing a site vibration test around the actual railway periodic bridge structure, and obtaining the measured value of the ground vibration velocity response; comparing and verifying the theoretical value of the ground vibration velocity response and the measured value of the ground vibration velocity response, performing spectrum analysis, time-frequency analysis and wave velocity inversion according to the comparison and verification result, and obtaining the near-field longitudinal wave velocity of the railway periodic bridge structure. The method is based on the periodic bridge structure vibration theory and the Doppler effect to test the longitudinal wave velocity, and has good time resolution and relatively stable test results.