266 results about "Moving load" patented technology

The invention discloses a user selection switching method based on a moving load balancing mechanism, mainly solving the problems of interrupted communication or Ping-Pong switching caused by rapidly descensive signal quality easily appearing in the prior method under the circumstance that a user moves at high speed. The user selection switching method has the specific process that a source base station detects the load condition of a cell and decides whether the load balancing mechanism is started or not; the source base station and an adjacent base station exchange load information by an X2 interface and determine an objective cell to which the load is transferred according to the obtained load information of the cell and an adjacent cell; the source base station and an objective base station consult to update respective switching parameter; the source base station makes the reselection on users satisfying switching toggle conditions after the switching parameters are altered so as to determine non real-time service users moving in the manner of deviating from the direction of the base station as final users to be switched; and the users to be switched are switched to the objective cell so as to realize the intra-cell load balancing. The invention greatly increases the probability of normal conversation after the switching is finished, ensures the continuity of user service and improves the user service quality and the system performance and is used for the moving load balancing mechanism of the next-generation mobile communication system.

An apparatus for selectively raising, lowering or otherwise moving load such or panel, or other article such as a pet door comprises a frame, a panel, a motor, a constant tension spring, and a control system. The panel is carried by the frame for movement between an open position and a closed position. The spring is attached to the panel to bias the panel open. The frame includes a plurality of groves retaining seals such as fibrous weatherseal to seal the interface between the panel and the frame against penetration by the elements. The control system is in communication with the motor to actuate the motor, thereby moving the panel with the assistance of the spring. The control system includes an antenna in the panel for emitting a low frequency (RFID) signal, and a fob that is worn by a pet to communicate with the antenna to actuate the motor.

The invention provides a method for preventing a conflict between moving load balance and moving robustness optimization function, which adopts the main idea that when the moving load balance operation is carried out in an LTE-Advanced network, the adjustment of the moving load balance to a switching threshold needs to be limited in the tolerance range of the moving robustness optimization so as to prevent various switching problems caused by inaccurately adjusting the switching parameter by the moving load balance.

Drive system for moving a load along a curved path. The drive system includes a base for mounting the drive system, the base having a curved track for guiding the load along the curved path. There is a load engaging mechanism mounted on the base for movement relative to the base, the load engaging mechanism being for moving the load. The load engaging mechanism has a curved track engaging roller for engaging the curved track. A linear drive mechanism including a linearly driven member is mounted on the base. The linearly driven member includes a driving pivot. A drive link is attached to the driving pivot at a drive force receiving end of the drive link, the drive link including a driven pivot at a drive force communicating end of the drive link. The driven pivot is attached to the load engaging mechanism, whereby linear motion of the driving pivot causes motion of the load along the curved path.

The invention relates to a testing device for simulating mechanical behaviors of a gravel soil subgrade under reciprocating traffic moving load. The device comprises a peripheral framework, a test sample box, an axial loading unit, a horizontal loading system and a data acquisition system, wherein the test sample box is arranged in the peripheral framework, a gravel soil subgrade test sample is filled in the test sample box, a road slab is paved above the gravel soil subgrade test sample, the axial loading unit comprises a trundle and a hydraulic loading system, the trundle is arranged on the road slab, the hydraulic loading system applies an axial pressure to the trundle, the horizontal loading system maintains the horizontal reciprocating movement of the trundle, and the data acquisition system is arranged at the four corners of the side wall of the test sample box. Compared with the prior art, the device disclosed by the invention can simulate the mechanical behaviors of the gravel soil subgrade under the reciprocating traffic moving load to obtain the relationship between gravel soil subgrade deformation settlement and parameters of loading time, loading frequency, axial load and the like, thereby reasonably guiding the engineering practice of road engineering construction and ensuring the stability of the gravel soil subgrade.

This invention provides an apparatus and a method of using the apparatus to lift a load, such as one end of a vehicle, to enable movement of the load from one location to another. The apparatus is comprised of an elongated member, such as a beam, and a winch slidably mounted on the elongated member which, in combination with the load itself and a stationary base, such as another vehicle, operates to lift and move the load.

The invention discloses a moving load analog loading method and device for a rail transit wheel axle. A plurality of actuators are distributed above sleepers along a rail direction, the bottom of each actuator is connected in the span middle of a distribution girder, the bottoms of two ends of the distribution girder are arranged above steel rails at two sides, two continuous steel rails are laid on the sleepers and are respectively cut into mutually independent sectional steel rails above the positions of the sleepers, and each pair of sectional steel rail and sleeper is connected by a fastening system. Vertical pressure and upward pulling force are applied on the actuators by an anti-drop external member. A stress load time travel curve of a single fastening system under the effect of the wheel axle moving at different moving speeds is determined according to a train-rail-roadbed theoretical model and is used as a load exciting curve of each actuator, and the adjacent actuators are dynamically excited sequentially in the same time interval along the moving direction of the wheel axle so as to realize the analog loading of the moving load of the wheel axle at different speeds. The invention provides a reliable and convenient loading platform for developing a rail traffic dynamic model test research.

A hydraulic circuit for raising and lowering a load arm on a work machine is adapted to provide a ride control function which will cushion shocks through the load arm as the machine traverses rough terrain. The circuit includes a hydraulic ram that moves the load arm and a first hydraulic accumulator connected to a first chamber of a hydraulic ram. The accumulator provides a cushioning effect to the ram when the ride control function is engaged. The accumulator is located between a first control valve and a load hold valve of the circuit so that the load hold valve will hold the ram in position should there be any sudden pressure drop in or adjacent the accumulator. The accumulator can also be connected to a control surface of the load hold valve to simultaneously open the valve and cushion the ram. A second dedicated accumulator can also be introduced for this purpose if desired.

Load handling equipment comprises vertical support structures between which transport means are mounted to be moved along a horizontal support structure between the vertical support structures to move a load relative to the support structures, and a distance-measuring device capable of generating distance measurement data is mounted in at least one of said support structures. The distance-measuring device is arranged to generate distance measurement data on at least two of the following objects relative to their mounting position, the objects comprising: a vehicle positioned beneath or on a side of the load handling equipment, the door of a vehicle, a person, a load, a reflector and transport means for moving a load.

A weighing system has at least one weighing platform receiving a moving load to be weighed, the platform includes at least one scale member connected to at least two approach members, and including at least one ramp member connected to at least one of the approach members. An interface is communicatively connected to the scale member. A controller is connected to the interface. And, a power supply is connected to the interface. Also disclosed is a weighing scale having a rigid pad having a top surface for receiving the load and a bottom surface. A plurality of load cells are included, each having at least two top surfaces and at least two bottom surfaces. A top surface of each load cell is connected at a predetermined location to the bottom surface of the pad. A foot member contacts the ground and is connected to a bottom surface of the load cell. Further disclosed is a load cell having a body defined by first and second sides. The body has a peripheral region of a predetermined thickness and a central region of a predetermined thickness which is less than that of the peripheral region. The central region is inset on each side with respect to the peripheral region. The central region is adapted for contact with a force.

The invention relates to a bridge influence line dynamic test method, and belongs to the technical field of civil engineering application. A mixed function f(x)=f1(x)+f2(x) formed by a polynomial f1(x) and amplitude tunable sine wave f2(x) is established firstly, then response of a test point is tested by experiments, and dynamic response {re} of the test point under the effect of unit moving load is obtained by an anti-inference method; and finally least square fitting is performed on the obtained dynamic response {re} of the bridge crossing test point under the unit moving load by using the mixed function f(x), and a corresponding bridge influence line is separated and extracted. Difficulty of distortion of the obtained influence line in the aspect of amplitude or shape and the like in existing bridge influence line dynamic test methods can be solved by the method, and the bridge influence line which is high in precision and can further reflect reality is obtained.

A magnetic force suspension robot for the operation of an overhead high-tension power transmission line comprises two suspension bushes (8), wherein the suspension bushes (8) can be opened or closed and are in central symmetry with a high-tension lead wire (9), each suspension bush (8) comprises a rectangular coil (4), an inner lining bush (1), a magnetic core (2) and an outer lining bush (3), and each inner lining bush (1), the corresponding magnetic core (2) and the corresponding outer lining bush (3) are arranged from inside to outside in sequence. The magnetic force suspension robot for the operation of the overhead high-tension power transmission line has the advantages that the robot can be suspended above the high-tension lead wire, zero contact and zero friction between the robot and the high-tension lead wire are achieved, and thus harmful abrasion and harmful moving loads are eliminated. Under the condition that driving force is available, the moving speed of the robot can be improved greatly through the zero contact and zero friction modes. Through the magnetic force suspension mode, the complexity of the moving mechanism of the robot can be lowered, and the light-weight trend of the robot can be achieved. A magnetic force suspension device is small in size, low in cost and easy to achieve.

The invention discloses a automatic material lifting system, it includes a transporting trail(crown block trail), a transporting vehicle(crown block) and a storage. The transporting vehicle can move on the trail. The storage includes a taking and putting part, which is in the storage. The transporting trail enters into the storage, and overlaps with the taking and putting part, when the transporting vehicle is in the taking and putting part, the moving loading machine puttes the material into the transporting vehicle.

The invention discloses a bridge moving load and damage synergetic recognition method based on L1 / 2 regularization. The method includes the steps that a plurality of structural response measurement sensors such as an acceleration sensor, a displacement sensor and a strain sensor are arranged on a bridge according to the aim and accuracy requirement of bridge structure health monitoring; a finite element model of the bridge is established through beam elements; moving loads are equivalent to a linear combination of rectangular loads, and bridge damage is equivalent to element stiffness reduction; the moving loads are recognized through a Tikhonov regularization method under the condition that an element damage factor is given, a reconstructed response is calculated with the moving loads, the range of the residual L2 norm of a measured response and the reconstructed response is obtained through comparison, and an L1 / 2 penalty term is introduced to establish an objective function with the element damage factor as an optimized parameter; a constraint optimization problem is solved with a Matlab optimization toolbox, the corresponding damage factor is the structural damage recognition result when the objective function is the minimum, and correspondingly the moving loads worked out through Tikhonov regularization solving are the moving load recognition result.

The invention discloses an axle housing body straight slit automatic welding production line and a control method thereof. The production line is characterized by being composed of two welding lines, a feeding line and a discharging line. The production control method of the production line comprises the feeding line action, the welding action and the discharging line action. An aerial move loading magnetic attraction type automatic carrying feeding and discharging system is adopted in the whole production line, through automatic turnover, double-face welding of an axle housing straight slit can be completed, functions of welding slit automatic tracking, automatic gun clearing, wire shearing and silicon oil spraying are achieved, an electrical control system is arranged for achieving automatic running, program control and monitoring of actions of a whole production line device, line mixing production of varieties can be achieved, unmanned operation is achieved, the automation degree is high, and the production efficiency is high.

The invention relates to a bridge bearing capacity evaluation method, and belongs to the technical field of civil engineering application. The method comprises the following steps: firstly, measuringthe dynamic response of a bridge under the action of a moving load through a field test; calculating and extracting an actual influence line of the bridge by adopting a piecewise polynomial function model and a cyclic fitting thought; constructing an influence line evaluation index based on the actual influence line and the theoretical influence line of the bridge; and evaluating the bearing capacity of the bridge by means of the constructed indexes instead of a traditional bridge load test static calibration coefficient. According to the method, the problem of bridge bearing capacity evaluation is solved; a load test method has the defects that the development cost is high, traffic needs to be influenced or interrupted, and time and labor are consumed. The bridge bearing capacity evaluation test process based on the moving load test is simple, the amount of acquired recorded data information is large, and the bridge bearing capacity evaluation test method has great significance in achieving rapidity and economization of bridge bearing capacity evaluation; in addition, the possibility of bridge damage caused by large-scale loading in a static load test can be avoided.

The invention provides a moving-load balancing method based on an efficacy function in an LTE (long term evolution) self-organized network. The method comprises the following step of calculating efficacy functions in all adjacent cells of an unsatisfied user in an overload cell. If all the efficacy function values of the unsatisfied user equal to 0, the user does not switch a target cell, and the user is in a status of congestion or wire off; and otherwise, an adjacent cell with a maximum efficacy function value is selected to carry out switching. According to the method, an admittance control condition in a target cell is selected to be converted into a part of the efficacy function based on A3 inequality triggered switching, and a switching selection process of the unsatisfied user is simplified by combining the adjacent cell spectrum efficiency and a subnet loading balanced index. By the adoption of the efficacy function, the adjacent cell information channel and the loading situation of a peripheral user are clearly expressed, so that an approximate direction of a cell where the user is located is indirectly shown, the unsatisfied user is enabled to directly select the current most excellent target cell to carry out switching in a complex scene, and a successful rate and the efficiency of switching are greatly improved.

A cart for moving loads includes a frame supported on wheels, a source of electric power supported on the frame, a drive system including a traction motor connected to the power source for driving a wheel secured to the frame and contacting ground, and a controller for adjusting a rotary direction of the drive wheel in response to selected states of an input to the controller.

A fluid power control system for load handling mobile equipment includes a pair of hydraulic actuators for moving respective cooperating load-engaging members selectively toward or away from each other, or in a common direction, at respective asynchronous speeds to selectively attain either synchronous or asynchronous respective positions of the actuators. The actuators have sensors enabling a controller to monitor their respective movements and correct unintended differences in the actuators' respective movements, such as unintended differences in relative intended positions, speeds, or rates of change of speeds. Respective hydraulic valves responsive to the controller separately and nonsimultaneously decrease respective flows through the respective actuators to more accurately and rapidly correct differences from the intended relative movements of the actuators.

A system for moving loads, in particular within an aircraft, comprising: a cargo hold floor, at least one row of rollers including a plurality of rollers integrated into the floor one behind another, at least one guide rail in the floor extending substantially parallel to the row of rollers, and at least one transport vehicle removably received in and movable along the guide rail. At least one coupling arrangement selectively couples the vehicle with a load arranged on the row of rollers, the load being movable with the vehicle. At least one locking arrangement, in an active state, locking the load relative to the floor and, in a non-active state, allowing a relative movement between the load and the floor. The vehicle operates the locking arrangement according to at least one of the following: so that it assumes the active state; and, so that it assumes the non-active state.

The invention discloses a method for recognizing a moving vehicle load on a bridge based on the generalized minimal residual algorithm. The method comprises the steps of 1, arranging photoelectric sensors, strain gauges and accelerometers at predetermined measuring point positions on a bridge floor; 2, establishing a simplified physical mechanical model of the bridge; 3, solving the term q[n](t) by means of convolution integral in a time domain to obtain a system function Af=b, wherein A represents a known system matrix, b represents a known bridge floor response, and f represents the desired moving vehicle load; 4, assigning an initial value f[0] to the desired moving vehicle load f to obtain an initial residue r[0]=b-Af[0]; 5, obtaining the moving load by means of the generalized minimal residual algorithm. According to the method, recognition precision is much higher than that of an ordinary moving load recognizing method, and the method is especially suitable for high-precision moving load recognition.

The invention provides a self-anchoring type mounting method of a suspension bridge. The method comprises the steps of constructing a main pier and a side pier; erecting beams and splicing through a crane; mounting a medium supporting pier of a side span steel box beam; mounting the side span steel box beam; mounting a temporary steel tower; mounting a main span steel box beam and a temporary cable; mounting a main cable and a lifting cable; converting the systems. The method is free of the limitation of navigation of a waterway; an ultrahigh bracket cannot be constructed in the river at a gorge region with steep bank slopes, so that the input is reduced; the longitudinal moving load can be decreased, and the longitudinal moving range, so that the long-distance and large-tonnage propping and pushing can be avoided, and as a result, the risk of construction safety in longitudinal moving can be reduced; a propping pushing bracket can be avoided being scoured by flood and floating articles, so that the safety risk of construction is reduced, and the construction is sped up.

The invention provides a simple support beam damage and moving force simultaneous identification method under a moving load. The simple support beam damage and moving force simultaneous identification method under the moving load includes steps: measuring accelerated speed power responses of a structure in damage status, and using the accelerated speed responses of the structure as power indexes of structure damage and moving force identification; using Chebyshev polynomials to represent the unknown moving load according to a structure numerical model, and using a beam element shape function concept to equalize the moving load to unit node force, and respectively figuring out sensitivity matrixes of the structure accelerated speed responses for damage and moving force parameters; using a responsive difference between each measured structure accelerated speed response and a finite element accelerated speed response which is obtaining through calculation as an objective function by using a sensitivity analysis result in combination, and using a first order Taylor expansion identification equation to perform iteration step by step and simultaneously identify damage and moving force of a simple support beam. The simple support beam damage and moving force simultaneous identification method under the moving load can achieve simultaneous identification of the damage and the moving force only through a small quantity of the measured accelerated speed responses of the structure, and is strong in practicability.

The invention discloses a bridge moving vehicle load identifying method based on a Kaczmarz algebraic iterative reconstruction method. The bridge moving vehicle load identifying method includes steps of uniformly arranging photoelectric sensors and accelerometers in bridge preset measuring points; (2) building a simple physical mechanics model of a bridge; solving qn(t) in a time domain by convolution integral to obtain system equation like Af=b, wherein A is a given system matrix, b is a given bridge deck response, and f is a solved moving vehicle load; (4) identifying the bridge deck moving vehicle load f by selecting proper iterative times k, namely the bridge acceleration response by the Kaczmarz algebraic iterative reconstruction method. The Kaczmarz algebraic iterative reconstruction method only needs simple iteration to identify moving load, the iterative formula does not contain other auxiliary vectors except linear equation set, and the bridge moving vehicle load identifying method is convenient to input, clear in theory, easy to popularize and very applicable to identify the moving load.

The invention discloses a self-locking acetabular posterior-wall posterior-column anatomical steel plate which comprises a steel plate body, a self-locking bolt and an auxiliary sleeve pipe, wherein the auxiliary sleeve pipe is used for controlling the installation of the steel plate body, and a locking-hole internal thread is respectively manufactured at the tops of a first self-locking hole, a second self-locking hole and a third self-locking hole; an external thread is respectively manufactured on the self-locking bolt and the auxiliary sleeve pipe, and the external thread can be in corresponding spinning fit with the locking-hole internal thread; the design per se permits appropriate torsion and bending in a three-dimensional space, is convenient for molding so as to be better fitted with individualized bones and is used for bearing the moving loads of joints, so that fractures are normally healed, and complications, such as fracture later-looseness, shift, pains, bone stress shielding and the like are reduced; the success ratio of fracture internal fixation operations is improved, the molding in the operations is avoided, the blood loss in the operations is reduced, the anesthetic time is reduced, the infected chances are reduced, and the operative risk is lowered; and the interference of built-in materials for sciatic nerves in the internal fixation of the operations is reduced.

The invention provides a moving load locating method used for bridge safety inspection. A position of a moving load in a time path curve is determined by utilizing the traditional midspan vertical speed response time path signal. The cost of the bridge inspection is lowered without increasing additional special devices and the analysis of bridge kinetic response parameters is simpler, clearer andquicker. The moving load locating method is implemented by comprising the following steps of: carrying out a Fourier transform on a midspan vertical acceleration response time path signal x(t) of a bridge; corresponding a signal x(t) of a time domain to frequency domain space, and writing the signal x(t) as F(x, theta); selecting a weight function H(theta), weighting the F(x, theta), and writing the F(x, theta) as HF(x, theta); carrying out an inverse Fourier transform on the HF(x, theta), returning a signal in a frequency domain to time domain space, and writing the signal as F<-1>HF(x,t); and determining a moment of the moving load of the signal x(t) in the midspan. The moving load locating method used for the bridge safety inspection has an important significance to simplify test equipment for bridge load carrying capacity and lower test costs.