16 results about "Vertical deflection" patented technology

The invention provides a large-diameter long-pipe-section pipe pile lifting appliance design and optimization method based on finite element analysis, and relates to the technical field of mechanical engineering and structure optimizing.According to the large-diameter long-pipe-section pipe pile lifting appliance design and optimization method based on finite element analysis, an overall finite element model comprising a pipe pile, a lifting appliance and lifting equipment is established, and the dynamic response of the whole lifting process is simulated; the method comprises the following steps: determining a reasonable range of a span-to-height ratio of a main beam of a lifting appliance, the number of lifting points and a distance; constructing a plurality of lifting appliance control schemes and carrying out finite element analysis; collecting stress and vertical deflection data of a tubular pile and calculating a variable coefficient and structural complexity of the data; generating an effect function value reflecting the excellence of the schemes; and finally, an optimal lifting appliance control scheme is selected based on the effect function value, and comprehensive optimization of the lifting appliance in the aspects of safety, stability and economy is achieved.

The present application relates to the technical field of calculation method, and specifically relates to a kind of stack bridge main beam deflection inversion method based on double inclination measurement, the three-dimensional finite element model of stack bridge is established according to stack bridge design parameter, the three-dimensional finite element model of stack bridge is simulated under standard control load working condition and simulation parameter is obtained, initial conversion coefficient is calculated according to simulation parameter, sensor is pasted on the surface of stack bridge main beam, the working parameter of stack bridge is detected by sensor, when stack bridge enters effective load steady state interval, sensor continuously acquires stack bridge parameter, iterative calculation is carried out according to stack bridge parameter, effective conversion coefficient is obtained after iteration, the vertical deflection of stack bridge is inverted by stack bridge parameter and effective conversion coefficient, a kind of stack bridge main beam deflection inversion method based on double inclination measurement can generate new conversion coefficient according to the inclination data of stack bridge each time work, to provide accurate stack bridge main beam deflection value.

The invention relates to the technical field of calculation methods, in particular to a trestle girder deflection inversion method based on double-dip-angle measurement, which comprises the following steps of: establishing a three-dimensional finite element model of a trestle according to trestle design parameters, performing static simulation on the three-dimensional finite element model of the trestle under a standard control load working condition, and acquiring simulation parameters; calculating an initial conversion coefficient according to the simulation parameters, pasting a sensor on the surface of a trestle girder, detecting working parameters of the trestle through the sensor, continuously collecting trestle parameters by the sensor when the trestle enters an effective load steady-state interval, carrying out iterative calculation according to the trestle parameters, and obtaining an effective conversion coefficient after iteration; according to the trestle girder deflection inversion method based on the double-dip-angle measurement, the trestle girder deflection inversion method based on the double-dip-angle measurement can iteratively generate a new conversion coefficient according to the dip angle data of the trestle when the trestle works every time so as to provide an accurate trestle girder deflection value.

The application provides a large-diameter long-tube-section pipe pile sling design and optimization method based on finite element analysis, relates to the technical field of mechanical engineering and structure optimization, and establishes a whole finite element model containing a pipe pile, a sling and hoisting equipment, simulates dynamic response in the whole hoisting process, determines a reasonable range of a sling girder span height ratio, a number of hoisting points and a spacing, constructs multiple sling control schemes, carries out finite element analysis, collects pipe pile stress and vertical deflection data, calculates variation coefficients and structural complexity, generates effect function values reflecting scheme excellence, carries out optimization by using a particle swarm algorithm, and finally selects an optimal sling control scheme based on the effect function values, so that comprehensive optimization of the sling in terms of safety, stability and economy is realized.

The utility model provides a slope belt replacement guiding device which comprises a vertically-arranged machine frame, the machine frame is a square frame body, the inner side edge of the machine frame is provided with a horizontal roller and two vertical deviation adjusting rollers which are symmetrically arranged, the horizontal roller and the vertical deviation adjusting rollers are connected with the machine frame through a first clamping groove and a second clamping groove respectively, and the horizontal roller and the vertical deviation adjusting rollers are connected with the machine frame through the first clamping groove and the second clamping groove respectively. Anti-toppling brackets are symmetrically arranged on the outer wall of the rack, and the anti-toppling brackets and the rack are in damping connection; the two first clamping grooves are formed in the two sides of the horizontal roller correspondingly and rotationally connected with the horizontal roller, and the two second clamping grooves are formed in the two sides of the vertical deviation adjusting roller correspondingly and rotationally connected with the vertical deviation adjusting roller. According to the slope belt conveying device, the problems of deviation, tearing and the like in the slope belt conveying process are effectively solved, the conveying efficiency and the safety are improved, and the production cost and the maintenance difficulty are reduced.

The invention discloses a multi-source submarine topography reconstruction method and system based on a frequency domain attention neural network, and relates to the technical field of submarine topography reconstruction. The method comprises the following steps: acquiring GEBCO water depth data, ocean gravity parameter abnormal data, vertical gravity gradient data, north component data of vertical deviation and east component data of vertical deviation, and constructing a five-channel input tensor; performing standardization processing on the five-channel input tensor, constructing a data set, and randomly dividing the data set into a training set and a test set through uniform sampling; processing the training set by using a frequency domain attention model to obtain fusion features, and inputting the fusion features into a predictor to generate a water depth estimated value; wherein the frequency domain attention model combines fast Fourier transform preprocessing with an attention mechanism, and the predictor is composed of a full connection layer and a ReLU activation function. According to the invention, the Fourier transform mechanism is introduced into the neural network architecture, the attention in the frequency domain is realized, and the submarine topography reconstruction precision is improved.

This invention relates to the field of building construction technology, and in particular to a method and system for predicting deformation during the construction of large-span steel structures based on mathematical modeling. The method first simultaneously collects deflection sequences from multiple regions to construct a deflection evolution path network characterizing the local deformation transmission trend. Second, it obtains a set of deformation differentiation features by aggregating and reconstructing path evolution relationships, accurately distinguishing between short-cycle construction disturbances and trend-based cumulative deformation. Subsequently, based on this set, the network is irregularly fragmented and recombined, and the response structural boundary is determined based on the deformation interleaving pattern, dynamically correcting the prediction path. Finally, the judgment order and feature weights are self-updated, real-time feature alignment and state mapping are performed, and the current vertical deflection state and over-limit warning are output. This invention achieves dynamic modeling from discrete monitoring to overall deformation evolution, effectively separating noise interference, improving the accuracy and adaptability of deformation prediction under complex working conditions, and providing reliable early warning for construction safety.

The application belongs to the technical field of structure deviation detection, and specifically discloses a steel box girder pushing deviation real-time detection method based on image recognition. The method is realized by arranging an optical target network on the top plate and the web of the steel box girder and a multi-view camera array, and realizes the synchronous measurement of the transverse deviation, the vertical deflection and the torsional deformation angle and the dynamic reconstruction of the three-dimensional topography. By constructing a visual-inertial tight coupling fusion model, the interference of complex environments such as vibration and shielding is effectively overcome, and then the real-time monitoring of the high-precision three-dimensional space position is realized. At the same time, by introducing a time series prediction algorithm to predict the future deformation trend of the beam body and the time point of the critical deformation, the technical leap from passive monitoring to active prediction is realized. Finally, the pushing deviation is calculated by comprehensively considering the current deviation, the predicted increment and the safety margin, and an early warning signal is triggered. Then, the best control opportunity can be accurately grasped.

The utility model relates to the technical field of teaching demonstration devices, and specifically discloses a multifunctional teaching demonstration instrument comprising an installation mechanism; the installation mechanism comprises a backboard, a display, a binding post assembly and wiring assemblies, the display, the binding post assembly and the wiring assemblies are arranged on the backboard, the demonstration mechanism comprises a camera, a vertical deflection coil and a horizontal deflection coil, the number of the wiring assemblies is two, and the positions of the two wiring assemblies are matched with the vertical deflection coil and the horizontal deflection coil respectively. The display is electrically connected with the camera; according to the device, the backboard with the display, the binding post assembly and the wiring assembly is arranged, layout and connection are carried out according to the figure, students can find that animations in a television are distorted, then the classroom interestingness is increased, the center of a fluorescent screen is firstly made to present a bright spot, a magnet is utilized to slowly approach a kinescope, the students are guided to observe phenomena and think reasons, and the teaching effect is improved. Therefore, a new class is introduced, the curiosity and internal driving force of the students are aroused, and the teaching effect is improved.

The invention discloses a gravity anomaly correction method and system for high-altitude tunnel distance measurement, and relates to the technical field of engineering surveying and physical geodetic surveying. The method comprises the following steps: firstly, judging the type of a measurement section, and constructing potential constraints by using a global background gravity field model and a digital elevation model; performing gravitational field forward modeling based on physical model parameters, generating a shaft axis gravity or tunnel axis vertical line deviation sequence, and performing physical reduction on ranging data; actual measurement gravity is collected, a residual error sequence is constructed, the residual error sequence is mapped into a ranging correction error through a sensitivity matrix, and a through error projection value is obtained through propagation; and finally, taking the minimum residual error as a target to invert and update the parameter until the through error meets a threshold value. According to the method, the closed-loop iteration of measurement section-strategy-index is established, so that the data calibers of the vertical shaft and the adit are effectively unified, and the influence of gravity anomaly on the penetration precision is inhibited.

The application discloses a method and system for inverting marine gravity anomaly based on physical information neural network, and particularly relates to the field of physical geodesy, and the method comprises the following steps: acquiring multi-source altimetry satellite sea surface height data, and calculating the north-south and east-west components of residual vertical deflection; utilizing the inverse Vening-Meinesz formula to invert gravity anomaly to construct a training set; constructing a physical information neural network, embedding the physical gradient relationship between the vertical deflection and the gravity anomaly into a loss function to perform constraint training, and establishing a high-precision nonlinear mapping model of the two; and finally inputting the data of a region to be measured to output inversion results. Through data driving and physical equation collaborative optimization, the application does not need data gridding and complex discretization processing, effectively fuses prior knowledge, and significantly improves the precision and physical consistency of marine gravity anomaly inversion.

The present invention relates to a freeform surface three-dimensional shape measurement system using a vertical deflection measurement method from which a gravitational error is removed and, more specifically, to a freeform surface three-dimensional shape measurement system using a vertical deflection measurement method from which a gravitational error is removed, the system comprising: a chuck support on which a wafer is mounted; a motion stage changing the angle of the chuck support; a first preform for measuring the shape of one side of the wafer in a state in which the planar direction of the wafer is parallel to the vertical direction; and a second preform for measuring the shape of the other side of the wafer in a state in which the planar direction of the wafer is parallel to the vertical direction, wherein the wafer is mounted on the chuck support in a state in which the planar direction of the wafer is horizontal, and the chuck support is rotated by a first rotating means of the motion stage to change the angle so that the planar direction of the wafer is parallel to the vertical direction in a measurement mode.

The invention relates to the technical field of river batholith construction, in particular to a batholith and formwork self-adaptive splicing construction method which comprises the steps that a formwork hydraulic trolley is moved to a lining position; according to the actual rotating speed of the rotating pair of the template hydraulic trolley, the dust hiding amount in the rotating pair is determined; determining a predicted recess depth and adjusting a vertical deflection angle of the template based on the dust hiding amount; obtaining three-dimensional point cloud data of the surface of the primary flat batholith and determining a lining concave curved surface area; determining a target sunken depth based on the maximum sunken depth value of the lining sunken curved surface area and the predicted sunken depth, determining the moisture loss degree of the concrete surface in contact with the template according to the target sunken depth and the settlement difference quantity of the concrete, and adjusting the vibrating mode of the lining sunken curved surface area; and according to the vibrating mode, self-adaptive splicing of the formwork and the batholith in the adjacent area continues to be completed. According to the method, the flatness of the lining surface of self-adaptive splicing of the batholith and the formwork is improved.

The invention discloses a tunnel drilling angle measuring system and method based on an unmanned aerial vehicle, and relates to the technical field of tunnel and underground engineering, the system comprises an unmanned aerial vehicle measuring device, a handheld control device and a self-charging storage box, the unmanned aerial vehicle measuring device comprises an unmanned aerial vehicle body, and the bottom of the unmanned aerial vehicle body is connected with a laser measuring unit through a stabilizer unit; visual sensors are arranged at the front end and the bottom end of the laser measuring unit and used for recognizing the axis of a tunnel face to establish the original point of a relative coordinate system and recognizing the position of a drill rod of a drilling machine. A plurality of laser emitters are integrated at the bottom and used for positioning a drill rod of the drilling machine and measuring the vertical distance between each laser emitter and the drill rod; and an angle calculation processing unit is arranged in the laser transmitter and is used for calculating the vertical deflection angle according to the ratio of the vertical distance difference to the horizontal distance of any two laser transmitters. Through non-contact automatic measurement, drilling angle data can be obtained and fed back in real time, and an operator is assisted in rapidly adjusting the posture of a drill rod.

The utility model discloses dust falling equipment for underground roadway construction, and relates to the technical field of roadway construction. A deflection device is arranged at the top end of the movable base, an inclination device is fixedly installed at the movable end of the deflection device, and fog gun machine equipment is movably connected to the inner side of the inclination device. According to the dust falling equipment for underground roadway construction, the deflection device and the inclination device are arranged, and a driving gear contained in the deflection device can promote a supporting frame to drive fog gun equipment to horizontally deflect through a follow-up gear ring; a driving rotary disc contained in the inclination device can promote a movable strip through an eccentric rod to drive a driving rack to drive a driven gear and the fog gun machine equipment to vertically deflect, so that the fog gun machine equipment is adjusted and positioned under the driving of the device, and a worker can conveniently adjust the dust falling range of the fog gun machine equipment; therefore, water spraying and dust falling can be conveniently carried out on roadways with different radians, and the spraying range and applicability of the dust falling device are improved.