84 results about "Force platform" patented technology

The invention relates to a wing tip support device for wind tunnel test. The upper connecting surface and the lower connecting surface of a force measuring balance are respectively connected with a support beam top plate and a force platform, two variable attack angle mechanisms are respectively arranged at the top end of a support upright post positioned at the outer sides of two side walls of the middle part of the wind tunnel test section, passing holes of a flange spline shaft are symmetrically arranged on the wind tunnel side wall of the equal height part of the center line of the flangespline shaft of the variable attack angle mechanism, one end of the flange spline shaft passes through the passing hole arranged on the wind tunnel side wall and is positioned in a wind tunnel, the other end of the flange spline shaft is connected with the variable attack angle mechanism arranged outside the wind tunnel, two variable side slide angle mechanisms are positioned in the wind tunnel and are fixed on a flange plate arranged at the end surface of the flange spline shaft positioned in the wind tunnel through a slide plate, and slide flanges of the two variable side slide angle mechanisms are connected with the wing tip of an airplane model through a model connecting element. The wing tip support device is applicable to airplane airdrop and airborne wind tunnel test, and airplane fuselages, high lift devices and afterbody drag wind tunnel tests, and has the characteristics that the structure is simple, the use is convenient, and the test data is reliable.

The invention relates to the field of design and manufacturing of force sensors and particularly relates to an orthogonal decoupling six-dimensional force sensor. The orthogonal decoupling six-dimensional force sensor comprises a fixed platform, a force measuring platform, detection branches and a strain gage, wherein the fixed platform and the force measuring platform are arranged in a parallel state; a set of detection branches at the vertical state are arranged between the fixed platform and the force measuring platform; each of the fixed platform and the force measuring platform is of a circular-disc-shaped structure; the center of the force measuring platform is provided with a quadrilateral through hole and the quadrilateral through hole is internally provided with a stand column; the other end of the stand column is connected with the fixed platform; the stand column is provided with a set of detection branches at the horizontal state; the other end of the detection branch at the horizontal state is connected with a hole wall of the quadrilateral through hole. The orthogonal decoupling six-dimensional force sensor has the following advantages of simple structure, simple and convenient measurement principle and great whole rigidity; all the detection braches are distributed in parallel or vertically so as to realize decoupling measurement on six-dimensional outer forces.

The invention discloses an improved type triaxial apparatus, which is formed by additionally assembling and improving the traditional strain control triaxial apparatus and used for shearing tests of soil samples. The improved type triaxial apparatus is sequentially provided with axial pressurizing equipment, a lifting platform, a triaxial pressure chamber platform, a counter force platform and an upper cross beam from bottom to top, wherein the axial pressurizing equipment and the upper cross beam are mutually fixed through a support member; the triaxial pressure chamber platform is internally provided with a plurality of pressure chamber units; and the counter force platform is correspondingly provided with a plurality of sensors. The improved type triaxial apparatus can be used for loading a plurality of samples for one time and simultaneously testing the samples, thereby preventing the troubles of multiple tests and saving the test time; and besides, because the plurality of pressure chamber units share a pressure device and a data processing data and sufficiently utilize the axial pressurizing equipment, the lifting platform, the upper cross beam, and the like which are arranged in a principal machine of the traditional strain control triaxial apparatus, the improved type triaxial apparatus can also sufficiently utilize the space and the resources and reduce the cost.

The invention discloses a force platform for a friction stirring welding machine. The force platform comprises a stirring head, a working platform, a transverse guide rail, an upper table top of the force platform, a down force sensor, a lower table top of the force platform, a vertical plate, a forward resistance sensor mounting plate, a longitudinal guide rail, a forward resistance sensor and a cushion block, wherein the stirring head is fixed above the working platform; the working platform is arranged on the transverse guide rail by a transverse sliding block; the transverse guide rail is arranged on the upper table top of the force platform of the down force sensor; the vertical plate is arranged at the front end of the lower table top of the force platform; the vertical plate is connected with the forward resistance sensor mounting plate by the longitudinal guide rail provided with a longitudinal sliding block; the vertical plate is connected with the working platform by a stud provided with double nuts. The force platform can be directly applied to the existing friction stirring welding machine tool, and is capable of recording the curve of the change of the down force and the forward resistance along with the welding process during work; the force platform also has a clamping function, so that a workpiece can be conveniently clamped.

The invention discloses a large-angle inclined leg pier pouring construction method. An inclined leg pier is composed of a V-shaped pier body and a cover beam transversely erected at the top end of the pier body. The construction method is characterized by including the following steps that the bottom of the pier body of the inclined leg pier and a bearing platform are located, connected and fixed; formworks of the pier body are installed, and a supporting structure for the formworks of the pier body is erected, wherein the supporting structure comprises a supporting piece using a cofferdam on the outer side of the bearing platform and a transverse circuit purlin of the bearing platform as a counter force platform to support the formworks of the pier body, and then the pier body is poured in the vertical direction layer by layer; and a formwork of the cover beam and the supporting structure of the formwork are installed, and the cover beam is poured. The method has the beneficial effects that the special structure of the cofferdam in water around the bearing platform and the circuit purlin of the bearing platform is used for erecting a supporting structure of the inclined leg pier, the occupied area is small, the overall stability of the supporting structure is good, the locating accuracy of the structure of the inclined leg pier is high, and the construction efficiency is high.

The invention relates to a tunnel model test platform with a complex loading-unloading work condition considered. The platform includes a self-balancing frame sub-system, a model test box sub-system,a loading control sub-system, and an automatic monitoring sub-system, wherein the self-balancing frame sub-system comprises a left main frame and a right main frame forming a balancing frame structure; the model test box sub-system includes a model box bottom plate having a universal wheel and a model box main body; a rock-soil body and a tunnel model are disposed in the model box main body; the loading control sub-system includes a jack module installed on a lower surface of an upper counter-force platform and used for implementing a loading-unloading combination under multiple work conditions via servo control; the jack module includes multiple jacks arranged orthogonally, and a loading steel plate disposed on heads of the jacks; and the automatic monitoring sub-system includes a monitoring device and a collector. Compared with the prior art, the tunnel model test platform provided by the invention has the advantages of modular design, diverse loading-unloading combination, capability of simulating multiple complex work conditions, etc.

The invention relates to the field of physical exercise analysis, human body gait research, orthopedic rehabilitation walking function evaluation and the like, and discloses a device and method for onsite static calibration of a three-dimensional force platform. The method comprises the steps of firstly carrying out onsite calibration on the three-dimensional force platform by using the device for the onsite static calibration of the three-dimensional force platform, then inputting various parameters after the calibration into a formula of a calibration algorithm to obtain a calibration coefficient C, and finally carrying out verification on a calibration result. The device and method for the onsite static calibration of the three-dimensional force platform can calculate the calibration coefficient on site through the formula, enables factory returning for recalibration to be needless, solve the problem of inaccurate calibration coefficients caused by the using period of equipment, improper mounting or collision, and have certain market prospects and application value.

The invention relates to a dynamic and static multifunctional test servo loading system, and belongs to the technical field of civil engineering. The system includes a steel reaction force platform, areaction force wall, a rigid cross type load beam and a dynamic actuator. The reaction force wall includes a first reaction force wall 1 and a second reaction force wall 2 at an angle of 90 DEG. Thedynamic actuator includes a plurality of horizontal dynamic actuators and a plurality of vertical dynamic actuators. The horizontal dynamic actuators are respectively connected with the reaction forcewall and the rigid cross type load beam. The vertical dynamic actuators are respectively connected with the steel reaction force platform and the rigid cross type load beam. The system component of the system can be freely disassembled to form a test servo loading system with different functions, and can realize free switching of static multi-dimensional loading, dynamic multi-dimensional loading, vertical high-speed impact loading and ocean wave simulation loading systems through disassembly and connection and the control actuators. The system can greatly save investment of manpower and material resources, and is a multifunctional test servo loading system which is reasonable in design, and is efficient and convenient, and can be dismounted freely.

A device for using waves formed by open sea pulse energy for power generation can generate power stably throughout the year like thermal power generation and never stops. An underwater balance wing flow plate in an integral supporting device floated in a water body can enter the water body to the needed immersion depth under the action of gravity with the magnitude adjustable and controllable, by using different fluctuating differences between the underwater water body and water surface waves, the wing flow plate passes through a fixed plate on the centerline of the wing flow plate and provides a reactive force platform for seesaw type motion of a hollow water self-swing rocking beam on the water surface, when corbel-bracket-shaped structures which are composed of upper resistance plates and lower resistance plates and located on the two sides of self-sliding buoyancy tanks at the two ends of the rocking beam bear the waves formed by the pulse energy in the sea water, one ends of the structures are supported by wave crests, the other ends of the structures tilt to the sea level, and the motion force can drive a linear generator installed in an underwater seal box through a linkage rod and a lever; the device is oriented through a connecting rudder plate and positioned in a seal area through a weight with an anchor type pendant sunk on the sea bed and a sleeved self-floating steel wire rope, and devices are connected mutually through flange plates to form a needed scale.

A portable lower limb therapy device having a support base and a pulley system. The support base includes a platform member fixably mounted on top of a slider and a heel panel positioned behind the platform member. The heel panel, which sits orthogonally relative to the platform member, is attached to the slider so as to extend from the rear end of the slider. The pulley system defines a closed force transfer system that is integrated with the support base. The pulley system employs a cord member, a support member, a cross member, and two handles and is configured to transfer force applied behind the heel panel to the platform member as well as force applied above a user's foot that is positioned on top of the platform member to the platform member.

The invention discloses a high-sea never-ending wave potential energy power generation device which is the only one device disclosing three advantages (normal power supplying, large scale and low power cost) by combining thermal power in pollution-free clean energies. According to the invention, the device comprises a floating tank, a water tank, a moving rod, a watering gravity center positioning connecting groove, a conical floating drum, an underwater balance wing flow plate, a guide wheel of a guide plate, a spring, a weight frame, a ratchet wheel constant speed flywheel and the like, wherein the floating tank and the water tank are utilized to do work twice for the upsurge and calmness of the same wave; ceaseless power generation can be carried out according the minimum wave heaving value by utilizing work doing based on stormy waves and also utilizing the moving rod with amplified work-doing amplitude; the watering gravity center positioning connecting groove and the conical floating drum are used for keeping the best work-doing semi-submersion depth and providing gravity center positioning; the connecting groove can be spliced into the required integral scale; the underwater balance wing flow plate of a counteracting force platform is provided by utilizing an underwater stable water body and a water level wave heaving difference; the guide wheel of the guide plate and the spring can automatically correct the inclination of a water-borne device; the integral device is delivered to an immersion point and is immersed after being assembled on land, and the weight frame can position and provide controllable pulling for a power generation device; and the ratchet gear constant flywheel can convert the wave potential energy into electric power energy.

A quick diefilling method of an injection moulding machine is that the injection moulding machine is provided with two pieces of magnetic force sucking discs which can be magnetized and demagnetized of a movable moulding board and a fixed moulding board, which are respectively used to fix a movable mould and a fixed mould of the injection moulding machine; a die space is arranged inside a clamping part of the movable mould and the fixed mould. A magnetic force platform is provided a tactic permanent magnet unit and is provided with a magnetizing and demagnetizing winding which is used to magnetize and demagnetize the permanent magnet unit. An inspecting circuit of magnetic induction intensity is provided; electromotive force, which is output by a sensor, is enlarged ten times by difference and then is compared by a voltage comparator and then output to an I/O opening of a microprocessor; a synchronous signal producing circuit and an electrical source synchronous signal ingesting circuit are provided. An input end is the 15 voltage alternating current which is output by a transformer and goes to a computing amplifier through a current-limiting resistor to be made into square-wave signal and then goes to 3K current-limiting resistor to be input into an interrupt input opening and the I/O opening of the microprocessor.

The invention discloses a multifunctional structure test loading system incorporating loading tonnage and loading accuracy in the technical field of civil engineering. The system includes an upright loading component and a main body frame, and further includes a plurality of pre-stressed anchoring assemblies that can lock a test model on a bottom reaction force base; the system further includes atop steel reaction force platform; the upright loading component includes at least four vertical loading climbing actuators; a plurality of X direction slide guides are arranged on the lower surface of the top steel reaction force platform; a plurality of sliders slidably arranged on the X direction slide guides are further distributed on the lower surface of the top steel reaction force platform;a Y direction slide guide arranged vertically in a staggered manner in space with the the X direction slide guides is installed on each slider; and a vertical loading actuator which is capable of performing vertical double-direction loading on the test model and in slidable cooperation with the corresponding Y direction slide guide is installed on each slider. The loading accuracy, application scope and use efficiency of the structure test loading system are significantly improved.

The invention provides a subdivisional tensioning system for a pressure dispersing type anchor cable. The subdivisional tensioning system comprises a single-hole jack, a support cylinder and a connector, wherein an externally connected hot-rolled ribbed steel penetrates through the center of the single-hole jack; the support cylinder provides a reacting force platform for the single-hole jack; the connector is arranged in the support cylinder, the connector comprises a first connecting end, steel stranded wires of the pressure dispersing type anchor cable penetrate through the first connecting end and are detachably fixed to the first connecting end, the double-hole connecter further comprises a second connecting end opposite to the first connecting end, and the second connecting end is used for connecting the externally connected hot-rolled ribbed steel; and the connector can move in the support cylinder in the tensioning direction of the steel stranded wires. The steel stranded wires of the pressure dispersing type anchor cable are fixed to the first connecting end of the connector one by one in a subdivisional manner according to the length of the steel stranded wires, and the subdivisional tensioning of the pressure dispersing type anchor cable is realized. By adopting the subdivisional tensioning system, the construction process of the pressure dispersing type anchor cable can be simplified, and the weight of a tensioning tool is greatly reduced.

The invention discloses an automatic detection method for an automotive air vent, comprising the steps that an air vent part with a barcode is mounted on a fixture, and the barcode is subjected to scanning detection; the air vent part is subjected to neglected mounting and fault mounting detection through surface detection or point-surface detection, and collected data information is compared with a database in the surface detection or point-surface detection; a thrust platform mechanism carries out thrust detection on the air vent part and collects thrust values, the average value of the thrust values is calculated, and the average value of the thrust values is compared and analyzed with corresponding data in the database; a torsion force platform mechanism carries out torsion force detection on the air vent part and collects torsion force values, the average value of the torsion force values is calculated, and the average value of the torsion force values is compared and analyzed with corresponding data in the database; and qualified and unqualified air vent parts are sorted. The invention also discloses automatic detection equipment for the automotive air vent corresponding to the automatic detection method. The equipment detection efficiency is improved, and the labor cost is saved.

The invention discloses a lower limb athletic ability quantitative evaluation method and system based on a force platform of a running machine. By collecting a signal of the force platform of the running machine and a pressure signal of a foot sole pressure sensor in the process that a user walks on the running machine, the time points when the left and right feet get off and touch the ground arefound in the walking process through a foot sole pressure signal; after smoothing and noise reducing, a collected force signal of the force platform is calculated to obtain a pressure center track inthe walking process; according to displacement and time of the pressure center track, the current moving speed of each pressure center point is calculated; the pressure center track is subjected to period cutting and time-phase cutting by utilizing the time points when the left and right feet get off and touch the ground; the pressure center track after period cutting and the track moving speed are utilized for obtaining a pressure center change chart; the pressure center track after time-phase cutting is utilized and calculated for quantizing evaluating parameters. According to the method andsystem, the quantification of lower limb athletic ability is more accurate and more objective.

The invention relates to a Moebius vibration isolator based on a wave mode conversion mechanism and an energy local effect. The Moebius vibration isolator is formed by combining multiple Moebius banded structures, and the multiple Moebius banded structures are connected into an integral structure through an upper part bearing force platform and a lower part bearing force platform; and the upper part bearing force platform and the lower part bearing force platform are respectively connected with upper part inclined plane regions and lower part circular arc regions of the Moebius banded structures. The Moebius vibration isolator provided by the invention couples the bending rigidity and torsional rigidity of the Moebius banded structures, the energy local region property is taken as an vibration isolation structure of a vibration isolation mechanism, and the Moebius vibration isolator has the advantages of large load-carrying ability, small static transformation, low inherent frequency, higher damping, and is capable of realizing low-frequency broad band transfer admittance and can not generate creepage, aging and temperature sensibility and the like.

The invention provides a high-temperature alloy honeycomb part milling processing clamping method, and belongs to the technical field of aerogenerator manufacturing. The invention provides the high-temperature alloy honeycomb part milling processing clamping method with the advantages of operation and removal simplicity, low cost and high clamping reliability. The clamping method provided by the invention comprises the following steps that 1, industrial paraffin and steel pills or cast iron pills are mixed and heated to a fusion state; 2, lattices of the high-temperature alloy honeycomb part to be processed are filled with the mixture of the industrial paraffin and the steel pills or cast iron pills heated to the fusion state, after the cooling, the two sides are trimmed to a flat state, and a high-temperature alloy honeycomb part blank is obtained; 3, the high-temperature alloy honeycomb part blank is absorbed by a magnetic force platform, and can be subjected to the milling processing.

The invention relates to an in-situ calibration device and method for measuring a micro aerodynamic force air floating platform. The device comprises a load bearing model and at least four calibration parts; the load bearing model is mounted on an air floating platform to be calibrated and is in a free state in the horizontal direction relative to the air floating plane; the at least four calibration pieces are mounted on the air floating platform, can apply load forces in different directions to the load bearing model, and are used for simulating the axial force, the lateral force and the yawing moment of the aerodynamic load borne by the model; and a tension sensor is installed between the load bearing model and the air floating platform in the direction corresponding to the load force. The signal-torque relation is obtained in an in-situ calibration mode, additional system errors are not introduced, and the accuracy of the force measuring platform is guaranteed.

The invention discloses a drop hammer-type compaction machine, which comprises a vehicle body, and a drop hammer mechanism arranged on the front end of the vehicle. The drop hammer mechanism comprises a fixed cavity, a compaction plate arranged on the bottom of the fixed cavity, a vibration machine arranged on the compaction plate, an inner lifting mechanism support frame arranged on the top of the fixed cavity, an inner lifting mechanism with the bottom penetrating through the vibration machine and with the top installed on the inner side of the inner lifting mechanism support frame, an external force rod penetrating through the fixed cavity and with the bottom in cooperation installation of on both sides of the front of the compaction plate, an external force platform arranged on the top of external force rod, and an external guide bracket arranged on the front of the vehicle. The vehicle has a guide rod vertically arranged on the rear middle part of the force platform; the guide rod is provided with a drop hammer; a traction wire is mounted at the top of the drop hammer; and the traction wire and a traction machine are in cooperative installation. The drop hammer-type compaction machine of the invention has three compaction modes to ensure strong force on the compaction part and high pressure withstand.

The invention provides a piece of power splitting tension loading test equipment suitable for CT scan. The equipment comprises the following components: a pulling force platform, a pulling and pressing converting mechanism, a pressure platform, a universal joint, steel poles, a test piece, a constraint platform, a pressure and displacement sensor, and a computer control system. A test piece is clamped between the constraint platform and the pressure platform; the universal joint guarantees realization of parallel pressurization; the pressure platform and the constraint platform are connected into a reaction frame through the steel poles, in order to form a self-balance system; the pulling force platform and the pressure platform are connected by the pulling and pressing converting mechanism, in order to realize conversion from pulling force load into pressure load; the pulling force platform is externally connected to a hydraulic elongator, in order to carry out application of dynamicloading; the load and displacement sensor, and the computer control system can guarantee loading mode and loading rate of the test, and at the same time experiment data is recorded. The equipment hasa small volume and is convenient for movement, and can be placed in a detection scope of a medical X-ray CT machine, in order to realize synchronization of measurement and loading, and effectively solve the problem of synchronous recording of crack initiation in the splitting tension test process.

The invention discloses a cross girder structure integrated loading system. The system comprises a reaction platform, an X-direction reaction wall, a Y-direction reaction wall, a cross girder, a tooling attachment, four Z-direction actuators, two X-direction actuators and two Y-direction actuators. A test piece is mounted in the tool attachment, the top end of each Z-direction actuator is movablyconnected with the corresponding end part of the cross girder, the bottom end of each Z-direction actuator is movably connected with the reaction force platform, one end of each X-direction actuator is movably connected with the Y-direction corresponding end part of the cross girder, the other end of each X-direction actuator is movably connected with the Y-direction reaction wall, one end of eachY-direction actuator is movably connected with the X-direction corresponding end part of the cross girder, and the other end of each Y-direction actuator is movably connected with the X-direction reaction wall. Two ends of the three actuators are movably connected with other structures, so the simultaneous acting condition of multiple loads can be simulated, thereby multi-degree-of-freedom loading is achieved.