108 results about "Ground vibrations" patented technology

The invention relates to the technical field of rail transit, and discloses a rail transit tunnel surface environment vibration assessment method, system and device and a medium. The method comprises the following steps: constructing a vehicle-rail-fastener dynamic model; calculating a fastener acting force frequency spectrum according to the vehicle-track-fastener dynamic model; constructing a 2.5 D finite element-basic solution solving model of tunnel-surrounding rock; solving the tunnel-surrounding rock 2.5 D finite element-basic solution solving model to obtain basic solution equivalent vibration source intensity; and calculating earth surface vibration according to the fastener acting force frequency spectrum, the basic solution equivalent vibration source intensity and the field layered soil body power transfer matrix model. According to the method, track vibration, tunnel vibration and site vibration are decoupled, the calculation method with the highest calculation efficiency is adopted in each subsystem, the advantages of each modeling method are fully combined, the calculation efficiency is extremely high, the obtained result is more accurate, the cost is low, and therefore the track traffic tunnel surface environment vibration condition is rapidly and accurately evaluated.

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.

To provide an evaluation support device and an evaluation support method for supporting confirmation of the condition of the hard ground where piles are to be installed.SOLUTION: A management device 20 that supports confirmation of the hard ground includes a measurement information storage unit 22 that stores measurement values of the frequency of ground vibration in association with measurement positions of ground vibration, and a control unit 21 connected to a display device. The control unit 21 calculates a frequency distribution of a spectral ratio obtained by dividing the spectrum of a horizontal component by the spectrum of a vertical component from the measurement values recorded in the measurement information storage unit 22, and converts the frequency of the frequency distribution into depth. The control unit 21 outputs to the display device a map that displays depth distribution information for the measurement positions, with the display format changed according to the spectral ratio.SELECTED DRAWING: Figure 1

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 application provides a whole vehicle railway folding conveying belt anti-intrusion control method and system, three-axis acceleration information of the folding conveying belt in the transportation process is collected; the intrusion weight corresponding to each axis in the three-axis acceleration information is determined based on the anti-intrusion direction, and the peak value feature of the three-axis acceleration information is extracted based on the intrusion weight corresponding to each axis, to obtain the transportation intrusion feature of the folding conveying belt; the transportation deviation trend of the three-axis acceleration information is extracted based on the transportation weight corresponding to each axis, to obtain the transportation deviation trend of the folding conveying belt; the railway ground vibration signal is obtained, the folding conveying belt is judged based on the transportation deviation trend and the transportation intrusion feature, and the anti-intrusion result is sent to the conveying belt control center, the anti-intrusion judgment can be made based on the deviation trend and the intrusion feature in the conveying belt transportation, and the active anti-intrusion in the transportation process is realized.

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.

The utility model belongs to the technical field of hydraulic engineering plant structure vibration monitoring, and particularly provides a hydraulic engineering plant structure movable vibration measuring device which comprises a carrying vehicle body, a rotary vibration isolation mechanism is arranged on the carrying vehicle body, a support is arranged on the rotary vibration isolation mechanism, and a laser Doppler scanning vibration measuring instrument is installed on the support. The rotary vibration isolation mechanism comprises a lower shell and an upper shell, an elastic supporting body is arranged between the lower shell and the upper shell, a rotary motor is arranged on the upper shell, the output end of the rotary motor is connected with a rotary platform, and the rotary platform is connected with the support. According to the device, comprehensive coverage of plant structure vibration monitoring is realized, and interference of ground vibration noise on vibration measurement can be reduced.

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 present application belongs to the field of rail transit station safety protection technology, and particularly relates to a station access security check device and system for rail transit safety, which is composed of a sensing unit, a processing unit, an execution unit and an interlocking unit connected in sequence, characterized in that the sensing unit comprises a first sensing mechanism and a second sensing mechanism, the processing unit comprises a signal demodulation mechanism, a first processing circuit, a second processing circuit and a third processing circuit, the execution unit comprises a first execution mechanism, a second execution mechanism and a third execution mechanism, and the interlocking unit is an interlocking interface mechanism; the beneficial effects are that the ground vibration detection and the boundary vibration detection are integrated, circuitized signal processing and logic judgment are adopted, and a hierarchical execution and wiring interlocking structure is constructed, so that the whole-area dead-angle-free perception, fast signal discrimination and risk linkage control of the security check area are realized.

The invention provides a cold atom gravimeter active vibration isolation method based on slow interference compensation, and relates to the technical field of cold atom gravimeter active vibration isolation, and the method comprises the following steps: building a cold atom gravimeter active vibration isolation model; designing a slow interference compensation law; a Lyapunov stability function is designed; according to the cold atom gravimeter active vibration isolation method based on slow interference compensation, a compensation proportional integral differential control law is designed, and the problem that a current control method cannot adapt to vibration environment change requirements due to the fact that the problem that ground vibration and random vibration caused by the natural environment are not considered is solved. Therefore, the vibration speed and the vibration displacement of the active vibration isolation system of the cold atom gravimeter are rapidly converged, and the control precision of the active vibration isolation system of the cold atom gravimeter is further improved.

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.

Embodiments of the present disclosure disclose a construction displacement monitoring method and device applied to a high-altitude overhanging component. A specific embodiment of the method comprises: in response to a real-time vibration signal representing that ground vibration is greater than a preset vibration intensity or reaching an image acquisition time point, acquiring a real-time image group; performing marker plate identification on each real-time image in the real-time image group to obtain a marker plate information set; in response to there being at least a target number of marker plate information in the marker plate information set that satisfies a screening condition, determining a component movement amount group; in response to there being camera offset, performing offset compensation on the component movement amount in the component movement amount group according to the camera offset amount; and in response to there being a compensated component movement amount greater than a warning threshold in the compensated component movement amount group, initiating component displacement warning. This embodiment realizes automatic and effective displacement monitoring of a high-altitude overhanging component.

The invention provides a passive vibration isolation device with a three-degree-of-freedom magnetic spring, particularly relates to a passive vibration isolation device capable of bearing the self weight of precision production and detection equipment and reducing ground vibration energy transmitted into the borne equipment, and belongs to the field of passive vibration control. The device comprises a rack, a load tray, a vibration isolation system, a three-degree-of-freedom magnetic spring assembly, a coupling mechanism, a horizontal vibration isolation assembly, a vertical vibration isolation assembly, a stator unit, a mover unit, a guide mechanism, a stator unit base, a stator magnet, a stator magnet pressing plate, a mover unit base, a mover magnet, a z-direction guide rail sliding block module, a z-direction motion platform and a y-direction guide rail sliding block module. A y-direction motion platform; and an x-direction guide rail slide block module. The device is provided with a plurality of pairs of rotor units and stator units in different directions, and the vibration isolation capacity of the device in the vertical direction and the horizontal direction is adjusted through the anisotropic rigidity between the rotor units and the stator units. The vibration isolation capacity is improved without influencing the bearing capacity, meanwhile, the multi-direction vibration isolation capacity is adjusted, and the design is simplified.

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 cold atom gravimeter active vibration isolation method based on a delay observer, and relates to the technical field of cold atom gravimeter active vibration isolation, and the cold atom gravimeter active vibration isolation method comprises the following steps: building a cold atom gravimeter active vibration isolation model; designing a delay observer; designing a proportional differential control law; a delay observer stability function is designed, and the problem that in an existing control method, output delay of an active vibration isolation system of a cold atom gravimeter under external disturbance such as ground vibration is not considered is solved. Therefore, the vibration speed and the vibration displacement of the active vibration isolation system of the cold atom gravimeter are rapidly converged, and the control precision of the active vibration isolation system of the cold atom gravimeter is further improved.

The application provides an optical cable depth detection method, system, electronic equipment and storage medium. The detection method receives detection vibration applied on the ground directly above the optical cable to be detected by a vibration receiving device, compares the take-off time point of the second vibration data received by the vibration receiving device with the first vibration data received by the optical cable to be detected, finds the setting position of the vibration receiving device that makes the take-off time points of the first vibration data and the second vibration data coincide, and takes the horizontal distance from the vibration receiving device to the vibration applying position as the depth of the optical cable to be detected. Compared with the prior art, the application does not need to measure the propagation speed of the vibration, only needs a vibration receiving device capable of detecting ground vibration and uploading corresponding vibration data and time information to complete the measurement, and the operation of the measurement is simple and clear, greatly improves the efficiency of the depth detection of the optical cable to be detected, and effectively reduces the detection equipment and operation cost.

The utility model discloses a hydraulic vibration-damping sound box foot stand which comprises a base, a stand column is arranged at the top of the base, a top plate is arranged at the top of the stand column, and a sound box seat is arranged at the top of the top plate. A hydraulic device is arranged in the stand column, a hydraulic rod of the hydraulic device upwards stretches out of the top plate to be fixedly connected with the sound box base, and the sound box base moves up and down through the hydraulic device. Vibration buffering foot nails are vertically arranged at the four corners of the base, penetrate through the base and extend out of the bottom of the base from the top of the base. Compared with the prior art, the utility model has the advantages that the structure is simple, and the use is convenient; the hydraulic device absorbs vertical vibration, the vibration buffering foot nails block ground vibration, and resonance is eliminated through double mechanisms; the problem of uneven ground is solved through adjustable foot nails, and levelness is ensured; the non-slip mat prevents the sound box from sliding; the carbon steel stand columns and the base balancing weights improve the structural strength and the anti-overturning capacity, and the sound field positioning precision is guaranteed.

To provide a drilling support device for supporting the evaluation of the hardness of stratum when drilling a pile hole, and a drilling support method.SOLUTION: A management device 20 for supporting confirmation of a hard ground includes: a drilling information storage unit 22 which stores a measurement value of vibration frequency of surface vibration, in association with a measurement position of the surface vibration; and a control unit 21 connected to a display device. The control unit 21 acquires a time sequence of the measurement values at the time of drilling, calculates a robust value regarding measurement values of a plurality of continuous measurement points in time, and outputs information regarding the hardness of the stratum using the robust values.SELECTED DRAWING: Figure 3

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 a precise micro-vibration environment simulation method based on an active vibration isolation technology. A passive vibration isolation unit is used for supporting the platform, a table top vibration sensor is used for sensing vibration of the platform, and an actuator is used for outputting control force and serving as an active excitation source at the same time; based on any target micro-vibration standard, quantizing the target micro-vibration standard into a discrete frequency spectrum, and reconstructing a time domain vibration excitation signal conforming to the frequency spectrum characteristic; a vibration signal of the mass center position of the platform is obtained through calculation of sensors at all positions of the platform; designing a feedback controller according to the system model, and calculating to obtain a feedback control signal by using the difference between the platform mass center vibration signal and the vibration excitation signal; and converting the final feedback control signal into a corresponding output acting force by using an actuator. According to the invention, excitation of any target micro-vibration standard can be realized, and micro-vibration environment simulation far lower than ground vibration can be realized by adding an active vibration isolation technology.