268results about How to "High loading accuracy" patented technology

The invention discloses a comprehensive performance test bench for a planetary roller screw. A driving assembly provides power for the planetary roller screw; a test assembly is used for mounting a planetary roller screw of a different model; a hydraulic loading assembly is adopted to carry out dynamic and static loading on a planetary roller screw nut, load borne by the planetary roller screw during actual work is simulated, and a force closed loop is adopted to ensure accuracy of the loading force. The test bench is provided with a torque sensor, an angle encoder, a circular magnetic grating, a grating ruler, a LVDT, and a force sensor. Measurement on torque, an angle, displacement and force is realized through the sensor. Through analyzing the test data, test on performance of the position precision, the speed, the acceleration, the transmission efficiency, the transmission clearance and the axial stiffness of the planetary roller screw of the different model in the load state can be completed. The test bench has the advantages of simple and flexible structure, thorough and accurate test performance parameters, high loading precision and strong test scalability.

A system is provided for use on large vehicles of the type wherein the vehicle frame is supported on vehicle axle assemblies through air bags, and each air bag has a lower end coupled to the lower end of an arm such as a swing arm whose upper end is pivotally mounted on the frame. The height of the air bag is sensed by a pair of tilt sensors, sensing tilt of its location with respect to gravity, and the difference in tilt indicates air bag height. The output of the tilt sensors may be filtered, and a motion detector allows rapid filling or dumping of air bags independent of filtering of tilt sensor signals. Control of the vehicle air suspension can also be based upon inputs from one or more air bag pressure sensors.

The invention relates to a load follow-up loading system for plane flap reliability tests. The system comprises a bearing wall. The system is characterized by further comprising a support component, a load loading adjusting unit and a load detection and adjusting unit, wherein a flap is mounted on a wing; the root of the wing is mounted on the bearing wall; the support component comprises two vertical columns and a transverse beam for supporting the load loading adjusting unit and the load detection and adjusting unit; the load loading unit comprises a moment motor and a steel rope; the moment motor is arranged on the support component and is used for exerting an action force on the flap; the steel rope is connected with the moment motor; the load detection and adjusting unit comprises an angle sensor, a sliding track component and a pulley component. A plurality of loading points are arranged on the surface of the flap, one loading point corresponds to one set of loading system, the size, the direction and an equivalent action point of real-time flap surface aerodynamic force can be simulated.

The invention discloses a contact-type reliability test bed capable of conducting mixed loading on an electric main shaft. The test bed is composed of the electric main shaft, a connecting shaft unit, a torque loading device, a radial force electromagnetic loading device, an axial force electromagnetic loading device and a swing arm device. The test bed can load an axial force, a radial force and a torque on the electric main shaft at the same time, control the magnitudes of the three forces in a coordinate mode to simulate cutting forces in different magnitudes and different directions, really and reliably simulate the cutting forces of the electric shaft in practical working conditions, and provide a test foundation for reliability acceleration tests of the electric shaft.

The invention discloses a dynamic loading device for a high-speed motorized spindle. The device comprises a supporting part and a loading part, wherein the supporting part comprises a spindle base, an axial loading bracket, a radial loading base plate and a dynamometer base. The spindle base comprises a spindle base plate, an adjusting base plate and a clamping mechanism. The loading part comprises a radial loading mechanism, an axial loading mechanism, a torque loading mechanism, a loading rod and a bearing unit. The torque loading mechanism comprises a power dynamometer and a high-speed spring tube coupling. The adjusting base plate and the clamping mechanism are overlapped on the spindle base plate and are fixedly connected with each other; the power dynamometer is fixed on the dynamometer base and is connected with the right end of the loading rod through the high-speed spring tube coupling; the left end of the loading rod is connected with the right end of a detected high-speed motorized spindle which is arranged in the clamping mechanism. The bearing unit is sleeved on the loading rod; the radial loading mechanism is arranged on the radial loading base plate and is positioned just below the bearing unit; and one end of the axial loading mechanism is arranged on the axial loading bracket, and the other end of the axial loading mechanism is in contact connection with the bearing unit.

The invention relates to a micro force load device of piezoelectric film suspension beam micro force sensor, belonging to sensor and test technical field, used for the static and quasi-static test and label of piezoelectric film suspension beam micro force sensor, wherein a micro force load device is composed of a one-dimension micro displacement table, a two-dimension micro displace table, a piezoelectric dual-crystal micro force generator, and a damping device. The one-dimension micro displacement table is composed of an X-axis micrometer element and a one-dimension micro displacement table base. The two-dimension micro displace table is composed of a Y-axis micrometer element, a Z-axis micrometer element, a two-dimension micro displacement table base, a support plate and a socket head cap screw. The piezoelectric dual-crystal micro force generator III is composed of a micro probe, a fixing block, two piezoelectric ceramic plates, an aluminum plate, a clamping plate and a socket head cap screw. The invention has simple and reliable structure, easy operation, and improved resolution of micro force loading system, to resolve the problems as instability and hard control of micro Newton force load.

In the present invention, a hinging point of lever is set on framework, one end of lever crossbeam is connected to hinging point and its loading crossbeam can be swung upwards and downwards around framework hinge, another end of lever is hinged with loading weight which is hinged on lever crossbeam through a movable block set and wirerope, movable block set can be two set, another loading application point between hinging point and weight hinged point is on lever crossbeam, adjustable guide bar is connected to loading application point and loading force from weight loading is applied to test sample through adjustable guide bar.

The invention belongs to the strength testing techniques of airplanes, and relates to a testing method for a supporting coefficient of a loading end in a compression stabilization experiment of a wallboard. A supporting clamp for the compression stabilization experiment of a reinforced wallboard comprises a hinged support clamp with a supporting coefficient of 1, a simple support clamp with a supporting coefficient between 1 and 4, and a fixed support clamp with a supporting coefficient of 4; a rectangular groove is processed on one side of the plane of an articulation block; and the end socket of a test piece is directly embedded in the rectangular groove. In the invention, the design of the test piece is given first; then a foil gauge is arranged, and the test piece and the clamps are mounted; a compression load is loaded hierarchically, and the load-stress is tracked and measured; when a curve knee point is discovered, the load is unloaded, and the load at the knee point is recorded; the load at the knee point is led in a theoretical formula to obtain the supporting coefficient; and finally, through increasing H or increasing clamping force, the supporting coefficient is adjusted. The method has the characteristics of simple operation, high loading precision and low cost.

The invention relates to a multifunctional road detection device and a test method for tires. Two suspension systems and two tire steering mechanisms of the multifunctional road detection device are arranged on a frame and are respectively independently connected with the tested tires on two sides of the multifunctional road detection device, so that the tires can be independently steered and can be adjusted in internally gathered or externally scattered states, and lateral inclination angles of the tires can be adjusted. The multifunctional road detection device and the test method have the advantages that data of rotation angles, lateral force, longitudinal acceleration, lateral acceleration and the like of the tires can be acquired by various relevant sensors during driving, so that mechanical properties of the tires under on-site road conditions can be detected; the problem of difficulty in simulating actual service road surfaces by existing indoor detection devices for tires and problems of unbalanced force under lateral deviation and lateral rolling working conditions and single detection working conditions of existing outdoor detection devices for the tires can be solved; the multifunctional road detection device is simple in structure and easy to control and adjust.

The invention discloses a visual physical experimental system and a visual physical experimental method for a rock hydraulic fracturing plane problem. The visual physical experimental system comprisesa crustal stress loading and control system, a hydraulic servo pump pressure system, a crack surface observation system, and an internal deformation and stress monitoring system, wherein the crustalstress loading and control system is used for applying confining pressure to s sample to simulate reservoir crustal stress; the hydraulic servo pumping system is used for pumping fracturing fluid intothe sample; the crack surface observation system is used for monitoring and recording a crack dynamic evolution process in the fracturing process and analyzing and processing the crack evolution process; and the internal deformation and stress monitoring system is used for monitoring an induced stress evolution rule and sample deformation characteristics in the sample in the hydraulic fracture propagation process. The visual physical experimental system and the visual physical experimental method can solve the problems existing in the rock hydraulic fracturing physical experiment, and play anirreplaceable important role in discovering a new multi-cluster fracturing phenomenon and revealing the inter-fracture rock mechanical response and competition mechanism.

The invention aims to provide a concrete test loading device and a test method under load and multifactor coupling. The concrete test loading device comprises a press machine, a fixture, a sensor component and a test piece box, wherein a concrete test piece and the sensor component are mounted in the fixture; the fixture is mounted in the press machine; and the test piece box is sleeved on the exterior of the press machine. According to the concrete test loading device and the test method, the structure is simple, the operation is convenient, real working conditions of a concrete member under the combined action of stress and chemical erosion, drying and watering cycle or freezing and thawing cycle in an actual project can be simulated, so that data measured in a laboratory is enabled to have high value of reference on projects.

The invention discloses a mask plate loading technology. It includes the following steps: taking plate from the bank; rough pre-aiming; mask plate connecting; fine pre-aiming. The precision of invention can reach that x direction minus or plus 1um, y direction minus or plus 1um, rz direction minus or plus 0.05mrad. Meanwhile, the fine pre-aiming can be reduced from traditional 3-5 times to 1 time, which can greatly increase pre-aiming efficiency and production rate.

The invention discloses a reciprocating type micro-friction abrasion testing machine and belongs to a micro-friction and abrasion testing device. The testing machine comprises a bottom plate, and a bracket, a driving device, a loading device, a positioning and clamping device and a signal conditioning and data acquisition device which are arranged on the bottom plate, wherein the bracket at least consists of two side plates which are longitudinally fixed on the bottom plate; a lower sliding rail seat and a top cylinder seat are at least arranged between the two side plates. An exciter serves as a power source, the equipment is small in size and has high driving force and wide amplitude and frequency variation range, the signal is provided by a signal generation card, multiple driving signals are provided, the frequency and the amplitude are convenient to adjust, and the testing machine is easily controlled by a computer program; meanwhile, a clamp system for a fixation test is simple in structure, reliable in clamping and convenient to mount, and tests in multiple friction pair contact forms can be realized by replacing the clamp. The designed testing machine is high in precision and convenient to operate and provides a reliable experimental instrument for research of micro abrasion.

The invention discloses a rudder load simulator not generating surplus torque, which belongs to the technical field of aerodynamic load simulation of an aircraft. The simulator comprises a sliding block driving motor fixed on a working table surface via a supporting table, a screw rod guide rail, a sliding block moving on the screw rod guide rail after a driving instruction of the sliding block driving motor is received, a torsion spring, an inertia disk, a speed reducer, a torque sensor, a lower computer controlling the sliding block driving motor, and an upper computer communicating with the lower computer, wherein the torsion spring is in rigid connection with the output shaft of a rudder engine room; and the torque sensor is in rigid connection with the output shaft of the rudder engine room. A loading instruction is tracked in a mode of changing the torsional rigidity of the torsion spring, and thus the surplus torque caused when the output shaft of the rudder engine room and the output shaft of a loading motor are coupled due to active rudder motion can be eliminated from the principle.

The invention discloses a mechanical high temperature creep testing machine capable of realizing automatic precise loading, belongs to the field of instruments of material science and machine manufacturing technologies and aims at solving the problems that when the existing mechanical creep testing machine employs a manual weight loading mode, cyclic load loading cannot be realized in the manual loading mode, when load is relatively high, the loading is relatively slow, labor intensity is relatively high, moreover, the load cannot be loaded continuously, and precision is relatively low. The mechanical high temperature creep testing machine is composed of a rack, a lever and connection mechanism, a weight automatic loading device, a rider precise fine-adjustment device, a lever self-leveling mechanism, a clamp and deformation measurement mechanism and a heating temperature control mechanism. Under the control of a control system, weight automatic loading and rider precise fine-adjustment can be realized, self-leveling can be carried out by a lever, and the problems that the existing manual loading mode is slow in loading and the cyclic load loading cannot be realized are solved; andmoreover, according to the mechanical high temperature creep testing machine, in a weight and rider combined loading mode, the continuous loading can be realized, so precision is relatively high.

The invention discloses improved skip weight-fixed loading equipment, which belongs to the technical field of weighing. A sector gate is mounted at an discharge port of a weight-fixing hopper; a weighing sensor is mounted at the bottom of the weight-fixing hopper; an sector gate oil cylinder is welded on the side wall of the weight-fixing hopper; the sector gate is connected with the sector gate oil cylinder; a coal level meter is mounted in a surge bunker; the discharge port of the surge bunker is positioned at the bottom of the bunker; a flat gate is mounted at the discharge port and is connected with a flat gate oil cylinder; the surge bunker is positioned right above the weight-fixing hopper; counterweight lifting oil cylinders are mounted below the two side walls of the weight-fixing hopper respectively; the oil paths of the flat gate oil cylinder, the counterweight lifting oil cylinders and the sector gate oil cylinder are connected with a hydraulic pump station; the coal lever meter, the weighing sensor, a belt conveyor and the hydraulic pump station are electrically connected with a controller in a lifting control chamber. The improved skip weight-fixed loading equipment has the advantages of high coal loading precision, strong reliability, avoidance of frequent exchange of the weighing sensor and reduction in maintenance cost.

The invention discloses an elastic load application device for a steering engine. The elastic load application device for the steering engine comprises a table-type stage installation platform formed by a support combination, uprights and an installation board. A guide board is fixed to the installation board through a plurality of screws. An installation frame, an installation disc and a support are sequentially clamped to the installation board through screws along the guide board. The steering engine is fixedly assembled on the installation frame. One end of a torsion bar is clamped to a clamping groove in the top end of the support. A pressing board is symmetrically arranged on the support through two screws at the upper end of the clamping groove, an output shaft of a torque sensor is clamped to the other end of the clamping groove, and effective clamping is achieved. The elastic loading torque of the elastic load application device for the steering engine is adjustable, the elastic load application device for the steering engine can be used for elastic load application of various steering engines with different output torques, and the elastic load application device for the steering engine has the advantages of being high in loading accuracy, large in load range, simple and effective in the clamping process, convenient to use, high in loading speed, high in reliability and the like.

The invention discloses a servo feeding system reliability testing device and method. The problem that a reliability testing device and method do not have the simulation numerical control machine tooldouble screw synchronous drive servo feeding system loading function is solved. The device comprises a double screw synchronous drive servo feeding system, a loading system, a detection system and acontrol system; the double screw synchronous drive servo feeding system is installed on a foundation through a tool body platform, the loading system is installed on the tool body platform through a servo manifold block support and a servo oil cylinder support, the loading system is connected with a working table installed on the tool body platform through a floating connector, and a first displacement sensor, a second displacement sensor, two pressure sensors, a first proximity sensor, a second proximity sensor and a laser interferometer in the detection system are installed on the tool bodyplatform and the foundation at the left side of the tool body platform; the control system is installed on the foundation at the upper right of the tool body platform through an operation desk. The invention further provides the testing method.

A large six-component measurement and angle-variable support device comprises a base, a six-component measurement and in-situ calibration device, an angle-variable device and locking devices. The six-component measurement and in-situ calibration device is arranged on the base. The angle-variable device is arranged on the six-component measurement and in-situ calibration device. The locking devices are located on the two sides of the angle-variable device. Before test, an engine is arranged on the angle-variable device, and initial calibration is conducted through the six-component and in-situ calibration device; after calibration is completed, the locking devices and an upper platform of the angle-variable device are locked and fixed, and impact loads borne by the engine when a high altitude flow field is established in the initial stage of the test are transmitted outward so that the six-component measurement and in-situ calibration device can be protected against damage; after the flow field is stabilized, rapid unlocking is achieved between the locking devices and the angle-variable device, the angle-variable device is rotated by different angles according to the requirements of the test, and force and torque of the engine at different angles are tested through the six-component measurement and in-situ calibration device.

The invention discloses automatic controlling device and method for a bridge static load test and relates to the technical field of bridge quality inspection equipment. The automatic controlling device comprises a test main controlling device, a loading executive device, a load measuring device, a deflection measuring device and the like. The automatic controlling method comprises the following steps: calculating a calculating load value Pk of each load grade; reading a detection load value Fi and a deflection value in real time, setting a relative lower limit deviation percentage Llim and a relative upper limit deviation percentage Ulim, comparing with Fi to obtain Fmax and Fmin; and comparing Fmax and Pk (1+Ulim), and selecting to execute a dynamic automatic balancing process or a synchronous balancing loading process. By automatically controlling the whole loading process by an industrial computer, the automatic controlling device and method are capable of automatically detecting and storing synchronous loading, automatic load balancing, load data and deflection data of each point, obtaining test reports, remotely monitoring test data and field images and also saving a great deal of manpower.