81results about How to "Guaranteed experimental accuracy" patented technology

The invention relates to a tensile test special fixture used for sheet metal or metal foil. The tensile test special fixture comprises an upper clamping head, a lower clamping head, two sets of guide post guide sleeves and threads through which the upper clamping head is connected with a stretcher stretching head base seat, wherein the upper clamping head comprises a T-type clamping component, a small clamping component and two pairs of bolts and nuts, and the upper clamping head is same to the lower clamping head in structure. Through holes are reserved in the upper clamping head and the lower clamping head along the direction parallel to the sample tensile direction, an upper guide sleeve is installed in the lower clamping head through hole, and the upper clamping head through hole is connected with the guide sleeves through guide posts. Bolt holes are reserved in the T-type clamping component and the small clamping component which are in the upper clamping head along the direction perpendicular to the sample tensile direction, and samples are clamped due to the fact that the two groups of bolts penetrate through the reserved holes of the clamping components. The tensile test special fixture used for the sheet metal or the metal foil is simple in structure and convenient to install and clamp, and overcomes various difficulties when the sheet metal and the metal foil are stretched.

The invention relates to a novel device for pseudo tri-axial creep of a rock and earth engineering test block and a using method of the device. The novel device comprises a plurality of surrounding steel plates which surround a rock-earth test block, wherein each surrounding steel plate is connected with a spring vertical compression device with adjustable pressure; a longitudinal loading device with adjustable pressure is arranged at the top part of the rock-earth test block; a pressure sensor is arranged between the spring vertical compression device and the surrounding steel plates; the pressure sensor and the loading device are connected with a control device; and the spring vertical compression device is connected with the longitudinal loading device. By adopting the novel device, a plurality of inconveniences in experiments in the prior art are avoided; and the spring pressure is simple, is easy to achieve and is convenient to adjust; through compressing the spring by a rotary screw, a large amount of complex mechanical control of the current devices are avoided, and therefore the experiment efficiency is greatly improved; the deformation in a creep process is relatively slow, the light error caused by the slight extension of the spring is avoided by adjusting the rotary screw in time, and therefore the experiment accuracy is guaranteed; and by adopting the pressure sensor, the creep ambient pressure is kept constant, and therefore the accuracy of a low-intensity pseudo tri-axial creep test is guaranteed.

The invention discloses a device for testing a frictional drag coefficient of an inner wall of a pipeline. The device consists of a high speed fan, a frequency converter, a turbulence smoothening section, a pipeline bracket, the pipeline, a multitube pressure gauge, a Pitot tube and a slanting leg manometer, wherein the frequency converter is connected with the high speed fan; the front end of the turbulence smoothening section is connected with the outlet of the high speed fan, and the rear end is connected with the pipeline; the pipeline is arranged on the pipeline bracket with an adjustable mechanism; pressure testing holes are processed at different positions of the pipeline and are connected with the multitube pressure gauge through tee joints and hoses; and at the tail end of the pipeline, the wind speed in the pipeline is tested by the Pitot tube, and the Pitot tube is connected with the slanting leg manometer. A method for testing the frictional drag coefficient of the inner wall of the pipeline comprises the following six steps of: 1, selecting a testing scheme; 2, selecting a testing means; 3, distributing the pressure testing holes; 4, analyzing the experimental accuracy; 5, designing and manufacturing the pipeline bracket; and 6, assembling the testing device, wiring and debugging. The invention has application value in the technical field of pipeline pressure and friction drag testing.

The invention discloses a four-point bending test clamp used for measuring the bending performance of test pieces, and the four-point bending test clamp is detachably installed on an universal tester or a press for four-point bending experiments. The four-point bending test clamp comprises a supporting part and a loading part; the upper surface of a bottom plate in the supporting part is provided with multiple second screwed hole groups arranged along the length direction of a test piece at equal intervals, and two adjustable bearers are adjusted by the screwed hole groups for adjusting the distance between the two adjustable bearers and further for adjusting the span between two supporting rollers; at least two first screwed hole groups are arranged along the length direction of the test piece at equal intervals and at each of the two sides of the surface facing to the test piece of a loading main body in the loading part; and a pressing roller unit employs screws corresponding to the first screwed hole group for selective screwing with screwed holes and further for adjusting the span between the two supporting rollers. The provided four-point bending test clamp installed on the universal tester or the press for measuring the bending performance of the test piece has the characteristics of being simple in structure and convenient to dismount and mount while helping to guarantee the test precision.

The invention provides a testing system for measuring rock fracture multiple-phase seepage characteristics. The testing system comprises a water supply device, a gas supply device, a multiple-phase seepage work chamber, a water collection device and a gas collection device, wherein the multiple-phase seepage work chamber comprises clamping plates compressed at the two sides of a fracture sample, an inlet end cap and an outlet end cap which are arranged on a fracture on the opposite surfaces of the fracture sample respectively, the water supply device and the gas supply device are both connected with the inlet end cap, and the water collection device and the gas collection device are both connected with the outlet end cap. Compared with other molding methods (such as miniature engraving machining), the testing system has the advantages that the structure is simple, the testing system is economical and practical, and still can complete the experimental process better under less investment, the practicability is high, and the popularization and application are convenient.

The invention discloses a nonconventional natural gas rock-gas-heat multi-process coupling test system. The nonconventional natural gas rock-gas-heat multi-process coupling test system consists of a fluid control system, a rock core adsorbing/desorbing and gas analyzing system, a vacuum suction system and a hydraulic cracking system, wherein the fluid control system is respectively communicated with the rock core adsorbing/desorbing and gas analyzing system, the vacuum suction system and the hydraulic cracking system. The nonconventional natural gas rock-gas-heat multi-process coupling test system has the advantages that the multiple coupling process tests of coal rock permeation evolution under the real three-axis or false three-axis stress loading, temperature loading, and multi-component gas diffusion conditions are realized, the whole-process data, such as experiment temperature, component gas flow rate and adsorbing characteristic, are dynamically stored and processed through software, and the nonconventional gas-enriching reservoir forming, adsorbing and desorbing rule of rock at stratum temperature, pressure and fluid medium can be scientifically simulated; the scientific experiment support is provided for the extreme complicated deep resource exploitation.

The invention discloses a weight method-based high-temperature and high-pressure isothermal adsorption measurement device and method. The device comprises a weighing system, wherein the weighing system comprises a balance, a weighing conversion device, weights and a sample barrel; the balance is mounted on a balance bracket; a hanging hook is arranged at the bottom of the balance; the weighing conversion device comprises three groups of motors, shifting forks and limiters; the shifting forks are horizontally arranged on the balance bracket; the limiters are arranged above and below the shifting forks in parallel; each motor is arranged at one end of each shifting fork and is used for driving the shifting fork to move up and down; the weights comprise a weight I and a weight II; the weightI and the weight II are hung on the hanging hook through metal wires; the sample barrel is hung on the hanging hook through a metal wire and is located between the weight I and the weight II. The measurement method is completed through steps of sample treatment, a blank experiment, a buoyancy experiment, an adsorption experiment and the like. On the basis of guaranteeing the experimental accuracyand reliability, the technical weight method-based high-temperature and high-pressure isothermal adsorption measurement device reduces the instrument cost and is favorable for popularization of a weight method-based isothermal adsorption experimental method.

The invention provides a measurement method and device for large-curvature-radius non-zero-digit interference based on a virtual Newton's ring. Circular carrier-frequency Newton's ring interferograms are converted into linear carrier-frequency interferograms via second-order polar coordinates, a low-frequency moire fringe graph after low-pass filtering is demodulated, wavefront differential data between a to-be-measured spherical surface and a standard spherical surface is extracted, and a calculation formula of the curvature radius is derived. On the basis of a model of a ZEMAX software based Fizeau spherical large-curvature-radium non-zero-digit detection system, a finite iteration method is used correct backhaul errors during Newton's ring interferogram collection in non-zero-digit detection. The Fizeau spherical large-curvature-radium non-zero-digit detection system is constructed, and verification for the spherical large-curvature-radium non-zero-digit measurement technology based on the virtual Newton's ring is completed.

The invention belongs to a positioning test fixture, and particularly relates to an automobile buckle insertion and extraction force and stress-strain test fixture. The test fixture comprises two parts including an insertion force fixture and an extraction force fixture corresponding to the insertion force fixture; the insertion force fixture comprises an insertion force fixture clamping block connected with a test machine, a first body, a second body, a third body, fixed sliding blocks and pressing circular plates; and the extraction force fixture comprises an extraction force fixture clamping block, an extraction force supporting assembly, a fixed baffle, a clamping device, a rotating knob and a clamping force adjusting round rod. The fixture is used during testing of stress-strain performance of an automobile buckle, and can clamp and position the buckle well during testing of the stress-strain of the automobile buckle, and slots in different models are formed in an H-shaped plate, so that buckles in various models can be tested. The test fixture is reasonable in structural design and convenient to operate; and the insertion and extraction force performance of plastic buckles can be tested accurately.

The invention discloses a visual CO2 anhydrous fracturing fluid rheological property test system and test method. The system comprises a CO2 gas cylinder, a piston container and a measuring cup; an outlet of the CO2 gas cylinder is connected with an upper inlet of the piston container, and an upper outlet of the piston container is connected with an inlet of the measuring cup; and a pressure device is further arranged at the bottom of the piston container. The visual CO2 anhydrous fracturing fluid rheological property test system disclosed by the invention has a compact overall structure and simple operation, can complete the measurement work of the rheological properties of CO2 anhydrous fracturing fluid, and can directly measure rheological parameters of carbon dioxide anhydrous fracturing fluid by an experiment; and by setting different temperature and pressure conditions, and adding different types of thickeners with different concentrations, the visual CO2 anhydrous fracturing fluid rheological property test system disclosed by the invention measures the rheological properties of carbon dioxide anhydrous fracturing fluid within a relatively large range of temperature and pressure conditions. At the same time, the visual CO2 anhydrous fracturing fluid rheological property test system disclosed by the invention can accurately control the dosages of the thickener and carbon dioxide, and can observe the mixing situation of the two ingredients in a rotary rheometer in real time, and evaluate the solubility of the thickener in CO2 and the rheological properties of the CO2 anhydrous fracturing fluid by experiments.

The invention relates to a device for testing adhesion between asphalt and an aggregate, wherein a water tank is arranged on a base; a temperature control electric furnace positioned on the outside surface at the bottom of the water tank is arranged on the base; an asbestosed wire gauze is arranged between the temperature control electric furnace and the water tank; a wire gauze is arranged on the side wall at the upper part of the water tank; at least two sample cups filled with aggregate particles coated with asphalt are arranged on the wire gauze; a water pump communicated with the interior of the water tank is arranged on the base; rainwater is contained in the water tank; a water spraying pipe just above the water tank is arranged on a water outlet pipe of the water pump; spray heads communicated with the interior of the water spraying pipe are arranged on the lower surface of the water spraying pipe; the spray heads and the sample cups are same in number; and a fine line, the lower end of which is connected onto the aggregate particles coated with the asphalt, is arranged at the lower end of each spray head. The device disclosed by the invention overcomes the trouble for performing a parallel test for many times and can be used for at least manufacturing two aggregates under the same condition, so that the device has the advantages of reducing experimental error, ensuring experimental precision, saving time, increasing experimental efficiency and reducing experimental cost.

The invention relates to a preparation device capable of purifying an entangled state in any dimension, and a preparation method, and in the device, light outputted by a laser isinputted to an A optical path and a B optical path through a nonlinear optical crystal; in the B light path, d-1 BDs are sequentially arranged along the light path, and finally d light branches are generated; in the lightpath A, the light passes through a first 66: 33 beam splitter and is divided into a reflection light path t and a transmission light path r, the light on the reflection light path t and the light on the transmission light path r are converged at a second 66: 33 beam splitter, and the output light of the second 66: 33 beam splitter sequentially passes through d-1 BDs to generate d light branches, so that a d-dimensional purifiable entangled state is prepared. The prepared purifiable entangled state is high in fidelity, the fidelity of the prepared two-dimensional purifiable entangled state is about 0.98, and the fidelity of the prepared three-dimensional purifiable entangled state is about 0.96.

The invention discloses a large-capacity alkaline burette, comprising a pipe body with a ruler, a titration head, a glass ball, a flexible rubber tube, a capacity ball, a communication pipe and a regulating valve. The capacity ball is connected to the pipe body through the communication tube, and the regulating valve installed on the connecting pipe. The large-capacity alkaline burette disclosed by the invention has a simple structure, and is convenient to add standard liquid into the burette through the set volume ball, which is convenient to operate, greatly improves the efficiency of the experiment, and reduces the operation difficulty of the alkaline burette.

The invention relates to a sampling and thickness measuring device for wax deposits at different spatial positions in an oil conveying pipeline. The device comprises a fixed ring, a fixed bracket, a rotary bracket, a sampling device, and an illuminating device. The outer wall of the fixed ring is connected with one end of the fixed bracket; and the other end of the fixed bracket is connected withthe rotary bracket. One end of the sampling device is installed on the rotary bracket and the illuminating device is arranged at the other end of the sampling device. Therefore, sampling and thicknessmeasurement can be carried out on deposits at different spatial positions in a pipe; the sampling points are distributed widely and the operation precision is high; and movement in a radial directionand an axial direction can be checked precisely by the dividing ruler.

The invention discloses a special fixture for a friction durability test of an automobile touch screen. The special fixture disclosed by the invention comprises a locating plate, each adjusting backing plate, a rotating dial, a special locating and clamping screw, a right locating baffle, a right adjusting bottom plate, a right fine-adjusting screw, a rotating stud and a loading bottom plate, wherein the rotating stud is in threaded connection with the rotating dial; the loading bottom plate is sheathed on the rotating stud to form rotating connection; the right adjusting bottom plate is in screw retention with the lower end of the right locating baffle; a left adjusting bottom plate is in screw retention with the lower end of a left locating baffle; the left adjusting bottom plate and the right adjusting bottom plate are symmetrically fixed at the two sides of the rotating stud; a left fine-adjusting screw and the right fine-adjusting screw are respectively installed in a threaded through hole in the middle of the upper ends of the left locating baffle and the right locating baffle; the left fine-adjusting baffle and the right fine-adjusting baffle are installed at the two sides of the threaded through holes in the middle; the locating plate is fixed on the upper end surfaces of the left locating baffle and the right locating baffle; each adjusting backing plate is fixed on the upper surface of the locating plate; and the special locating and clamping screw is fixed in the through hole in the center of the locating plate.

The invention relates to a temperature controllable type multifunctional animal spinal cord injury impactor. The impactor comprises a fixer platform, wherein the fixer platform is provided with a size adjustable fixing collar and multiple sliding grooves, limb fixing rings are installed on the sliding grooves, a vertical rod with scale marks is detachably installed at one end of the fixer platform and located in front of the fixing collar, the vertical rod is sleeved with a connecting arm with scale marks, the connecting arm can rotate around the vertical rod while sliding up and down along the vertical rod, a hollow pipe is movably connected to the connecting arm and slides leftwards and rightwards along the connecting arm, a heating device provided with a temperature controller inside is installed on the bottom of the fixer platform, and a plug is connected to the heating device. By the adoption of the impactor, experiment failures caused by evasion of animals are effectively avoided, and experiment efficiency and experiment precision are guaranteed. The impactor is simple in structure, easy to operate and worth application and popularization.

The invention provides an application method of a water injection well whole shaft tubular column dissolved oxygen corrosion simulation device. The water injection well whole shaft tubular column dissolved oxygen corrosion simulation device comprises a liquid storage vertical pipe (13), an air injection system, a nitrogen pressurization system, an electric heating system, an aeration circulation system, a dissolved oxygen monitoring system, a corrosion reaction circulation system and an experiment auxiliary control system. According to the corrosion evaluation method, the function relation between the well depth and the experiment time in the water injection process is established, the water injection well whole shaft tubular column dissolved oxygen corrosion rate is calculated through one-time experiment data in combination with the corrosion electrochemical theory, the experiment frequency is greatly reduced, and the experiment time and the experiment cost are remarkably reduced.

The invention provides a plane cascade experiment device capable of independently adjusting a mounting angle. The plane cascade experiment device comprises an upper grid plate, a lower grid plate, a first spacing column, a second spacing column, blades, an upper rotating disc, an upper pressing plate, a lower rotating disc and a lower pressing plate. An operation tool acts on the operation hole to enable the upper rotating disc to rotate clockwise or anticlockwise, when the upper rotating disc rotates, the upper pressing plate is driven to rotate synchronously through the first screw and the second screw, and when the upper rotating disc rotates to a required angle, the first screw and the second screw are screwed down, so that the position of the upper rotating disc is fixed. The independent adjustment of the mounting angle of each blade can be independently realized through the independent mounting angle adjusting unit, so that the cost is effectively saved; the pressing plate, the rotating disc and the grid plate which are specially designed are adopted, on one hand, the blade angle can be flexibly adjusted in the clockwise or anticlockwise direction; and on the other hand, the position of the turntable is fixed firmly and cannot deflect in the wind tunnel experiment process, so that the wind tunnel experiment precision is ensured.

The invention provides an evaluation device for simulating dissolved oxygen corrosion of a whole wellbore pipe column of a water injection well. The evaluation device comprises a liquid storage vertical pipe, an air injection system, a nitrogen pressurization system, an electric heating system, an aeration circulation system, a dissolved oxygen monitoring system, a corrosion reaction circulation system and an experiment auxiliary control system. According to the corrosion evaluation method, the function relation between the well depth and the experiment time in the water injection process is established, the water injection well whole shaft tubular column dissolved oxygen corrosion rate is calculated through one-time experiment data in combination with the corrosion electrochemical theory, the experiment frequency is greatly reduced, and the experiment time and the experiment cost are remarkably reduced.

The invention discloses a carrying task labor intensity load measurement experiment system and method. The system is formed by two adjustable placing benches, variable-weight carrying boxes and carrying information acquisition devices. The adjustable placing benches and the variable-weight carrying boxes are used for simulating carrying tasks under various work conditions; and the carrying information acquisition devices are used for synchronously collecting and simulating carrying frequency and carrying height in the carrying task process. The device can carry out unified planning and collection on key elements, such as carrying height, carrying frequency and carrying weight, for calculation of labor intensity under a specific carrying task, thereby reducing experiment errors and facilitating carrying out the experiment. The system and method can calculate the amount of heat produced by a human body in unit time, and determine labor intensity load of an actual carrying task based on design of carrying distance, carrying weight and carrying time and according to the collected carrying frequency.