50results about How to "Precise load control" patented technology

The invention provides a combined-loading stress corrosion testing apparatus. The apparatus comprises a tension ring; a hermetically arranged environmental container; a gas inlet pipe, a gas outlet pipe, a thermocouple and a pressure sensor which extend into the environmental container from above; upper and lower clamps respectively arranged at the upper and lower ends of the environmental container; a loading bolt in threaded connection with the free end of the lower clamp; a rotary motor connected with the free end of the upper clamp; an electromagnetic stirrer arranged in the lower part of the environmental container; and a magneton arranged in the container. The radial end of the tension ring is fixedly connected with the upper clamp, and the other end of the tension ring is connected with the end, far away from the lower clamp, of the loading bolt; and the tension ring applies tension on the upper and lower clamps through rotation of the loading bolt. A testing method based on the apparatus is used for research on corrosion resistance of a drilling rod, an oil sleeve material and the like in an oil and gas well with high temperature, high pressure and a multiphase flow corrosive medium under complex stress conditions including drawing, torsion and liquid flow impact.

The invention discloses a horizontal testing device for a reliability test of an aircraft landing gear door uplock. The horizontal testing device is composed of a connecting and supporting structure, a simulated door structure and a driving and loading structure, wherein the door uplock to be tested, the simulated door structure and the driving and loading structure are all installed on the connecting and supporting structure, the simulated door structure comprises a lock ring, a lock ring support, a rotary cross beam and a bearing support, and the driving and loading structure comprises a composite rocker arm, a transmission connecting rod, a main bearing shaft, a hydraulic actuator cylinder, an actuator cylinder transmission connecting rod, a loading assembly and a loading transmission connecting rod. The horizontal testing device can be matched with a vibration table to achieve vibration stress loading, can be matched with a comprehensive environment testing box to achieve the change of working temperature, can be matched with a hydraulic system to achieve the work triggering of the door uplock to be tested, and can simulate the loading of aerodynamic loads through a loading structure. According to the horizontal testing device, the loading structure is compact, the degree of freedom of work is high, additional resistance is small, circular motion of the lock ring can be achieved, and load control is accurate.

A PWM circuit includes a counter, a cycle register, a cycle detector, a pulse width register, a pulse width detector, an additional pulse width register, a voltage generator, a selector, and a voltage controller. The voltage controller controls the selector so as to add a first additional pulse at a first voltage to the end of a pulse width, based on a cycle detection signal outputted by the cycle detector, a pulse width detection signal outputted by the pulse width detector, and a set value indicating the first voltage of the first additional pulse outputted by the additional pulse register, thereby deciding a voltage outputted from the PWM circuit and a period in which the voltage is output.

The invention relates to a multicomponent three-dimensional organism printing device and method based on multi-channel nozzle. The device comprises a multi-channel nozzle which is located on a three axis stepper motor. The multi-channel mozzle is made of multiple nozzles arranged in parallel. One end of all micro-channels is aligned to form the nozzle, and the other end is connected with all liquid storage containers through Teflon pipes. All liquid drive devices are connected with all the liquid storage containers to drive the liquid in the liquid storage containers. A terminal control system controls the three axis stepper motor, all the liquid drive devices and temperature control devices to make the multi-channel nozzle move correspondingly and eject ink, thus achieving the three dimensional printing on a temperature control substrate. The device can precisely adjust the proportion of different ink types through controlling the ink feeding speed of all the channels. The printed artificial tissues and cells are more close to the actual tissues or organs, thus making the device have a broader application prospect compared with the prior art of tissue engineering.

The invention relates to a flexibility uniform distribution pressure loading device applicable to a geomechanical model test, comprising a hydraulic cylinder thrustor, wherein the upper end of the hydraulic cylinder thrustor is connected with a hydraulic cylinder by virtue of a spherical hinge, and the bottom of the hydraulic cylinder thrustor is provided with a flexible force-transfer cushion layer. The loading device can be connected with a counter-force frame by virtue of a preposition flange or a postposition flange of a hydraulic cylinder, the maximum load of 50t can be applied, the maximum load intensity on the model surface is 4.5MPa, the load intensity deviation is less than or equal to 5%, the stress on the model surface is uneven, and the depth is less than 100mm. The invention can realize flexible uniform distribution pressure loading on the model surface; the structure is simple, the assembling is flexible, the operation is easy, the size of single loading unit is reasonable, and the loading and unloading can be realized when the hydraulic cylinder is combined with a hydraulic station and a hydraulic automatic control system; and meanwhile multiple loading devices can be combined in different arrangements, and the gradient loading is realized. The invention integrates the hydraulic cylinder, the spherical hinge, the thrustor and the flexible force-transfer cushion layer, and the uniform distribution loading effect is better.

The invention relates to a friction test device for a steel wire rope. The steel wire rope includes a center steel wire and an outer steel strand arranged around the steel wire. The friction test device comprises a fixed rack and a test assembly arranged on the fixed rack, the fixed rack is provided with a saddle connected to the steel wire rope, and the test assembly is provided with a tension meter. The friction test device for the steel wire rope provided by the invention can test the friction coefficient and slip characteristics of the steel wire rope and the saddle, reduce the floor space and use cost of the test device, and improve the similarity of test data and actually used data.

The invention discloses a high temperature test system for a water pump drive motor and a controller. The system comprises a drive motor, the controller, a water pump, a radiator, an electric heatingbox and a control and data acquisition unit, wherein the drive motor and the controller are to-be-tested device; the water pump and the radiator are connected by a pipeline to form a closed circulation pipeline; the water pump is driven by the drive motor; a temperature sensor, a pressure sensor, an electronic valve and a flow meter are connected to the pipeline between a water outlet of the waterpump and the radiator; the pressure sensor is also installed on the pipeline between a return water port of the water pump and the radiator; the drive motor and the controller are respectively installed in an electric heating box with controllable ambient temperature; the control and data acquisition unit are simultaneously connected to the drive motor and the controller; and the control and dataacquisition unit monitors and records the input current and voltage of the controller, the controller chip temperature, the motor shaft end temperature of the drive motor, and determines the high temperature test condition of the drive motor and the controller through the system running time.

The invention provides a method and system for planning and optimizing a new energy grid-connected power communication network. The method comprises the following steps: determining a communication service demand of new energy grid connection; acquiring current data of a power communication network; and planning or optimizing the power communication network based on the communication service demand and the current status of the power communication network. The method and system take the service demand of the new energy grid connection into account, take a unified consideration of communicationnetwork planning and optimization, and classify new energy grid-connected communication services as protection of an ultrahigh voltage alternating and direct current hybrid power grid system, preciseload control and promotion of automatic demand response of new energy consumption; and the provided communication network planning and optimizing method is more suitable for developing intelligent power grids and energy internets for a new energy grid connection demand.

A hydraulic control system for soft-reduction analog loading tests comprises a test hydraulic cylinder. The piston cavity and the rod cavity of the test hydraulic cylinder are respectively connected with a test valve device. The test hydraulic cylinder is connected with a loading hydraulic cylinder through a connecting rod. A displacement sensor is mounted on the loading hydraulic cylinder. The piston cavity and rod cavity hydraulic loops of the loading hydraulic cylinder are connected with overflow valves, one-way valves, normally-closed logic valves, normally-open logic valves, proportional pressure reducing valves and a servo valve. The hydraulic control system has the advantages that primary proportional control of pressure is performed on the loading hydraulic cylinder through the proportional pressure reducing valves, precise servo control of pressure is performed on the loading hydraulic cylinder by the aid of the servo valve, and accurate simulation of soft-reduction loading acting force is achieved; the hydraulic control system composed of hydraulic devices is high in automation level, precise in loading force control and safe and reliable.

The invention provides a high-precision S-shaped pressing machine and a control method thereof. The high-precision S-shaped pressing machine comprises a servo motor, a coupler connected with the servomotor, a speed reducer connected with the coupler, a servo motor cylinder connected with the speed reducer and a rack with a built-in control device, wherein the servo motor cylinder is provided witha pressure head; a pressure sensor is arranged between the pressure head and the servo motor cylinder; a working table is arranged above the rack; stand columns are arranged at four corners of the working table; an upper top plate is arranged at top ends of the stand columns and is arranged corresponding to the working table; a pressing space is formed by the working table, the stand columns andthe upper top plate; the servo motor cylinder is arranged on the upper top plate in a running through manner, and the pressure sensor and the pressure head are arranged in the pressing space; the servo motor is used for driving the speed reducer to rise or descend through the coupler, and the speed reducer is used for driving the servo motor cylinder to rise or descend accordingly, so that the pressure sensor and the pressure head are driven to rise and descend accordingly. The high-precision S-shaped pressing machine achieves the aims of precise pressing and real-time detection.

The invention relates to a combined ultrathin flexible uniformly distributed pressure loading device for geomechanical model tests. The device comprises an ultrathin hydraulic oil cylinder thruster and a combined flexible force transfer cushion layer, wherein the center of the hydraulic oil cylinder thruster is provided with a loading oil cylinder; the top of an oil cylinder piston is provided with a connecting flange; and the bottom of the hydraulic oil cylinder thruster is provided with the combined flexible force transfer cushion layer. The device can be widely applied to the surface loading of various geomechanical model tests, has a simple structure and is flexibly assembled and convenient to operate, a single loading unit has a reasonable size, a hydraulic oil cylinder is a two-way oil cylinder with an oil inlet and an oil outlet, and a hydraulic station and a hydraulic automatic control system are matched to realize loading and unloading; meanwhile, a plurality of loading devices can be combined in different arrangement modes, so that gradient loading is realized. The hydraulic oil cylinder, the rigid thruster and the flexible force transfer rubber cushion layer are integrated, so that the loading space is greatly reduced, the size of a model counter force frame is reduced, and the steel of the counter force frame is saved.

The invention relates to a preparation method of a zinc-iron composite oxide loaded activated carbon desulfurizer, which comprises the following steps: impregnating activated carbon with the water content of 0.1-0.5 wt% in a zinc-iron mixed solution at 60-80 DEG C, and controlling the impregnation time according to the bulk density of the activated carbon; drying the impregnated activated carbon,and controlling the drying rate according to the adsorption saturation of the activated carbon during the period; and roasting the dried activated carbon at 500-700 DEG C for 2-4 hours to obtain the finished product of the zinc-iron composite oxide loaded activated carbon desulfurizer. By improving and innovating the preparation process, the loading uniformity and dispersity of the active components on the carrier are greatly improved, and the sulfur capacity and desulfurization precision of the loaded activated carbon desulfurizer are effectively improved, so that hydrogen sulfide in the chemical production process is efficiently and stably removed, equipment corrosion is prevented, and the environment is protected.

The invention relates to a stress relaxation crack sensitivity temperature testing method for hardened and tempered high-strength steel used in a large-size spherical tank. In the method, firstly, simulation of weld thermal cycle is carried out to a test sample, wherein the test sample is heated according to preset steps so as to simulate structure status of HAZ, and then a high-temperature tensile test under a thermal treatment condition is carried out until the test sample is broken. The stress relaxation crack sensitivity temperature of the steel material is acquired on the basis of change on the reduction of area of the test sample. In the method, welding thermal simulation technology is employed to carry out a welding test, so that the method has short test period and can simulate the structures of all welding zones. Because temperature and loading control of a test machine are quite accurate, accurate test data can be acquired. The method has low working load and is high in testing efficiency, and is a simple method for testing the stress relaxation crack sensitivity temperature. The method is applied to test of the stress relaxation crack sensitivity temperature of steel materials and provides evidence for making a post-weld heat treatment process for a hardened and tempered high-strength steel pressure vessel.

The invention discloses a simulation wheel-grind forming machine for bitumen mixture specimens and a specimen manufacture method. The simulation wheel-grind forming machine comprises a grind wheel, a grind wheel driving device, a grind inflating device and a control box. The grind wheel comprises a rim, a retainer ring and a tyre. The outer edge of the rim is provided with the retainer ring. The tyre encircles the outer edge of the rim through the retainer ring. The grind wheel driving device comprises a retarding mechanism, a rack, a hydraulic dowel bar, a hydraulic cylinder, a guide rail and a transmission chain. The retarding mechanism is in power connection with the transmission chain. The top of the hydraulic dowel bar is cooperatively and slidingly installed on a guide rail of the control box. The hydraulic dowel bar is cooperatively provided with the hydraulic cylinder. The hydraulic dowel bar has a telescopic motion bar. The bottom of the hydraulic dowel bar is hinged to the rack. The center of the top of the grind wheel's rim is fixedly connected to the bottom of the rack. The top of the rim is provided with the grind wheel inflating device for inflating the tyre. The simulation wheel-grind forming machine has a simple structure, is reasonably designed and is easy and simple to install, use and operate.

The invention discloses a primary frequency modulation and AGC superposition control method in an opening mode of a hydroelectric generating set, which comprises the following steps: in the running process of the set, primary frequency modulation and AGC instruction actions do not need to be mutually shielded and priorities do not need to be set, and a set ACG command and a primary frequency modulation action are adopted for common superposition running. According to the method, the power value after the primary frequency modulation action is superposed on the basis that the large closed-loop active control value of a hydroelectric generating set monitoring system is the AGC scheduling new instruction value under the condition that the AGC instruction occurs simultaneously during the primary frequency modulation action, so that an AGC instruction new control value and the primary frequency modulation action value are included simultaneously under the condition that the system is closed-loop, therefore, the signal superposition of the primary frequency modulation action quantity and AGC is realized, and the unit load control is accurate.

The invention belongs to the field of material mechanical property testing, and discloses a mechanical-thermal coupling fatigue testing device for in-situ analysis of an infrared spectrometer, which mainly comprises a structural body, and a mechanical loading unit, a data acquisition unit and an environment loading unit arranged in the structural body, wherein the mechanical loading unit comprisesa motor, three belt wheels, two conveying belts, two lead screws, a nut ejector block, two cross beams and two clamp sets; the data acquisition unit comprises a grating ruler, a reading head and a load sensor; the environment loading unit comprises an air inlet, a humidity sensor, an environment box upper cover plate and a temperature and humidity environment box. The device can be installed in instruments such as a Fourier infrared spectrometer and a polarizing microscope, in-situ component analysis and microstructure characterization of the material in the mechanical property testing process are achieved, and the component change rule and failure behaviors in the material fatigue test are analyzed; and the temperature and humidity of the sample environment can be regulated and controlled on line, a mechanical-thermal-humidity coupling loading environment is realized, and deep research on chemical components and structures of materials is met.

The invention discloses a simulation vibrating wheel-grind forming machine for bitumen mixture specimens and a specimen manufacture method. The simulation vibrating wheel-grind forming machine comprises a grind wheel, a grind wheel driving device, a vibrating compaction device, a rack and a control cabinet. A hydraulic dowel bar is installed inside a load rack. The grind wheel driving device is in power connection with the hydraulic dowel bar. The grind wheel is in power connection with a hydraulic pressure loading bar of the hydraulic dowel bar. The vibrating compaction device is fixed on the rack. The vibrating compaction device comprises a vibrator used for applying vibration force onto the grind wheel. A rubber vibration isolator is installed between the vibrating compaction device and the rack. A specimen support device comprises a support frame, a forming platform and a specimen mould. The specimen mould is placed above the forming platform. According to the specimen mould, a rectangular specimen mould cavity which is corresponding to the position of the grind wheel is formed by a baseboard and side moulds arranged around the baseboard, and two side moulds divide the rectangular specimen mould cavity into three cuboid specimen mould cavity units with square planes. The simulation vibrating wheel-grind forming machine has a simple structure, is reasonably designed and is easy and simple to install, use and operate.

The invention provides a preloading structural part for a high and large formwork support system, which is used for solving the technical problems caused by preloading detection using sandbags or concrete blocks. The preloading structural part comprises a brick pier component and preloading components, wherein the brick pier component consists of a first brick pier block and a second brick pier block; a first floating layer is arranged at the top of the first brick pier block; a second floating layer is arranged at the top of the second brick pier block; the top surface of the first floating layer is level with the top surface of the second floating layer; each preloading component consists of 2-10 preloading units in horizontal arrangement; the preloading components are piled at the top of the brick pier component layer by layer; and 2-20 layers of preloading components are paved at the top of the brick pier component. The preloading structural part provided by the invention has the beneficial effects that a relatively large unit area load can be obtained under the condition of relatively low loading height so as to reduce the height of a preloading body and the hoisting workload of the preloading body and guarantee high safety.

The invention discloses a preparation method of a novel staggered communication nanowire supercapacitor electrode, and belongs to the technical field of capacitor electrodes. The method comprises thefollowing steps: S1, preparing a bacterial cellulose solution with the concentration of 0.5%; S2, taking the prepared bacterial cellulose solution; freeze drying treatment, preparing the bacterial cellulose aerogel; S3, placing the obtained bacterial cellulose aerogel under a hot press for hot pressing, to prepare the compact bacterial cellulose aerogel; S4, putting the obtained compact bacterialcellulose aerogel into a vacuum tube furnace for carbonization treatment to prepare a compact micro supercapacitor electrode; and S5, compounding the obtained compact micro supercapacitor electrode with the sulfuric acid-PVA electrolyte to prepare the nanowire supercapacitor with high energy density. According to the invention, the density of the nanowire can be regulated and controlled, and the area loading capacity and porosity of the nanowire can be accurately regulated and controlled, so that the supercapacitor with high energy density and high power surface density is obtained.

The invention relates to an asphalt mixture rut test piece vibration wheel rolling forming instrument and a use method thereof, and belongs to the technical field of engineering machinery. The instrument comprises a vibration rolling system and a control system, the vibration rolling system mainly comprises a base, a moving trolley, a rolling wheel and a vibration motor, a rail is arranged at thetop of the base, the bottom of the moving trolley is connected with a dowel bar, a support is arranged on the side edge of the base, a hydraulic dowel bar is arranged at the top end of the support, the rolling wheel is in power connection with a hydraulic force loading rod, and the vibration motor is arranged at the top of the rolling wheel; and the control system is composed of a box body, a vibration switch, a moving trolley driving switch, a rolling wheel lifting switch and a parameter input unit, the hydraulic force loading rod is connected with an oil pump, the oil pump is connected withan oil pump switch, the moving trolley driving switch is electrically connected with a driving device, the vibration motor is electrically connected with the vibration switch, the rolling wheel lifting switch is electrically connected with the rolling wheel, and the vibration switch, the rolling wheel lifting switch and the hydraulic dowel bar are electrically connected with the parameter input unit.

The invention discloses a load control system and control method based on a novel fitness load mode, and relates to the technical field of fitness apparatuses. The load control system comprises a switch module, a memorizer module, a reading module, a computer processing module and a threshold setting module. The threshold setting module is connected with the computer processing module. The outputend of the reading module is connected with the computer processing module. The memorizer module is connected with the computer processing module. The memorizer module is used for storing the positionread by the reading module for the first time after the load control system is started. The computer processing module is connected with an electromagnetic load module. The computer processing moduleis used for reading position data read by the reading module, conducting processing and calculating according to the read position data, comparing the calculating result with the threshold set by thethreshold setting module, and controlling the electromagnetic load module according to the comparison result. By means of the technical scheme, the system has the advantages of being precise in loadcontrol, convenient to control and high in control efficiency.

The invention relates to a composite flexible uniform pressure loading device suitable for a geomechanical model test. The device comprises a hydraulic oil cylinder thruster, wherein the upper end of the hydraulic oil cylinder thruster is connected with a hydraulic oil cylinder through a spherical hinge; and a composite flexible power transfer cushion layer is arranged at the bottom of the hydraulic oil cylinder thruster. The device can be widely applied to surface loading of various geomechanical model tests, has a simple structure, is flexible to assemble and convenient to operate and ensures rational size of a single loading unit; the hydraulic oil cylinder is a two-way oil cylinder with an oil inlet and an oil outlet; loading and unloading can be realized by matching a hydraulic station with a hydraulic automatic control system; meanwhile, a plurality of loading devices can be combined in different arrangement modes to realize gradient loading. In the device, the hydraulic oil cylinder, the spherical hinge, the thruster and the composite flexible power transfer cushion layer are organically combined, and the device has better uniform loading effect. An oil cylinder front loading flange can be fixed on a counterforce frame and a steel plate is penetrated by a piston rod to provide power, so the loading space is compressed, materials are saved and high adaptability is ensured.

The invention discloses a high-stability high-temperature membrane electrode for a fuel cell and a preparation method of the high-stability high-temperature membrane electrode. The high-temperature membrane electrode comprises a high-temperature polymer electrolyte membrane, a gas diffusion electrode and a membrane-electrode interface layer, wherein an interface layer is introduced between the high-temperature polymer electrolyte membrane and the electrode, and the interface layer is composed of one or a mixture of more of a metal oxide with nano particle size, a water-insoluble heteropolyacid salt, a pyrophosphate nano carbon material and the like; the interface layer can effectively slow down the migration rate of phosphoric acid from the high-temperature polymer electrolyte membrane into the catalyst layer, improve the phosphoric acid retention capability of the electrolyte membrane and the membrane electrode, and further improve the working stability of the high-temperature membrane electrode; meanwhile, the interface layer can also improve the distribution of phosphoric acid in the catalyst layer and improve the output performance of the membrane electrode. The membrane electrode of the high-temperature polymer electrolyte membrane fuel cell is excellent in performance, good in working stability, simple in preparation method and suitable for industrial large-scale batch production.

The embodiment of the present invention provides a method for cell traffic trace messages and a mobility management entity. The method for cell traffic trace messages includes: acquiring a cell traffic trace message sent by a current base station, wherein the cell traffic trace message includes the base station information of the current base station; if the current base station is in an allowed base station set, determining whether the number of cell traffic trace messages received within a predetermined time exceeds a cell traffic trace message limit; if so, discarding cell traffic trace messages sent by the current base station; and if not, processing the cell traffic trace messages sent by the current base station. When a wireless-side base station initiates cell traffic trace, the method for cell traffic trace messages controls the number of processed cell traffic trace messages at a core network MME network element to protect the MME network element against the impact of massivetracking messages.

The invention provides a high-precision C-shaped press. The high-precision C-shaped press comprises a motor, a speed reducer coupling connected with the motor, an electric cylinder connected with thespeed reducer coupling, a frame, a control device arranged in the frame, and a machine body arranged above the frame; the electric cylinder is provided with a pressing head; a pressure sensor is arranged between the pressing head and the electric cylinder; the machine body comprises a pressing worktable surface arranged on the frame, a top surface and a side surface; the pressing worktable surfaceand the bottom of the top surface are respectively connected to two opposite sides of the side surface; the pressing worktable surface, the top surface and the side surface form pressing space; the electric cylinder is inserted in the top surface; the pressure sensor and the pressing head are arranged in the pressing space; and the motor drives the electric cylinder to ascend or descend through the speed reducer coupling so as to drive the pressure sensor and the pressing head to ascend or descend. The high-precision C-shaped press can realize precise pressing and real-time detection. The invention further provides a control method of the high-precision C-shaped press.

The invention discloses an experimental method for simulating the variable load and inertia of the joints of industrial robots. The experimental device for simulating the variable load and inertia of the joints of industrial robots is adopted. The experimental device for simulating the joints of industrial robots with variable load and inertia includes a control system, a motor drive Control circuit, dynamometer controller, working table, input servo motor, planetary gear reducer, first coupling, dynamic torque sensor, second coupling, angle sensor, double bearing housing, variable inertia lever arm, second Three couplings, a rotating shaft, a mass slider, a positioning bolt, a hysteresis dynamometer, a first support base, a second support base and a third support base, the present invention integrates the static change of inertia, and can change both the inertia and the change Load, the load control system can meet various complex load conditions, and can briefly simulate joint motion conditions.

The invention relates to the technical field of steering wheel testing, in particular to a steering wheel load testing platform which comprises a bottom plate, a frame body is arranged on the surface of the bottom plate, a steering wheel body is arranged above the bottom plate, a control box is fixed to one side of the surface of the bottom plate, and a falling mechanism is arranged above the bottom plate. The falling mechanism is composed of a gas-liquid pressure cylinder, a linear bearing, a fixing column and a weighing sensor. A testing mechanism is arranged on the surface of the bottom plate, and a magnetic powder brake, a driven wheel body, a torque sensor and a driven shaft are arranged in the testing mechanism; an adjusting mechanism is arranged above the bottom plate, and a mounting mechanism is arranged above the steering wheel body. According to the test platform, the convenience degree of the test platform in use is improved, product tests of steering wheels of different specifications can be conveniently and quickly realized, hard limiting is provided for the test platform, and the situation that the tested steering wheels are possibly damaged due to electric, gas and liquid faults is avoided.