31results about How to "Extend the experiment time" patented technology

The invention relates to a diagenesis simulation experimental apparatus and method. The diagenesis simulation experimental apparatus comprises a rock core clamping mechanism, a heating mechanism, a gas porosity and permeability measurement process, a liquid injection and liquid permeability test process, an automatic continuous outlet-fluid metering and sampling mechanism, a burden pressure boost control mechanism, a fluid physical property detection mechanism and a data acquisition-calculation and automatic control mechanism, wherein, the inlet and outlet of the rock core clamping mechanism are respectively connected with the gas porosity and permeability measurement process and the liquid injection and liquid permeability test process; the heating mechanism is sheathed at the periphery of the rock core clamping mechanism, and the burden pressure injection port of the rock core clamping mechanism is connected with the burden pressure boost control mechanism; the outlet of the liquid injection and liquid permeability test process is connected on the automatic continuous outlet-fluid metering and sampling mechanism; the fluid physical property detection mechanism detects a fluid sample of the automatic continuous outlet-fluid metering and sampling mechanism; and the data acquisition-calculation and automatic control mechanism acquires, records, stores and calculates temperature, pressure and flow rate in an experiment and meanwhile controls operation of the corresponding solenoid valve and the automatic continuous outlet-fluid metering and sampling mechanism according to the experimental status.

The invention discloses a non-decoupling motion distribution method for continuous on-orbit linkage trajectory capture experiments. This method collects the current pose of the main body model and the separated body model, and gives the homogeneous transformation matrix between the wind tunnel coordinate system, the model center of mass coordinate system, and the decoupling point coordinate system, and obtains the next position of the main body model and the separated body model. Time step pose, and then calculate the relative position change distance in the X, Y, and Z directions; distribute the non-decoupling motion of the main body and the separated body mechanism according to the proportion of the stroke margin; control the main body and the separated body mechanism to complete the X, Y, and Z directions The uncoupled motion of , and their respective angular motions, arrive at the next time-step pose of the main body model and the separated body model. This method can avoid the movement of the main mechanism and the separation body mechanism in the same direction, improve the utilization rate of the experimental space, obtain longer experiment time and more captured track points, and improve the service life of the main body mechanism and the separation body mechanism. The advantages of simple and fast, efficient and reliable operation.

The invention discloses a device for weakening the rarefaction wave of a hydrogen-oxygen detonation shock tube, which includes a detonation driving section, a transition section, a driven section, a diaphragm and a baffle. The detonation driving section, the transition section and the driven section are connected in sequence. The diaphragm is arranged at the joint of the detonation driving section and the transition section. The baffle is arranged at the joint of the transition section and the driven section. The upper end of the baffle is hinged to the pipe of the transition section or of the driven section. After the incident shock wave formed by the detonation driving section breaks the diaphragm, the baffle is lifted up to allow the incident shock wave to pass and be propagated to the driven section. Part of the incident shock wave is reflected by the baffle and interferes with rarefaction wave, so that the attenuation effect of the rarefaction wave on the incident shock wave is weakened, and the steady flow time of the incident shock wave is prolonged. After the incident shock wave passes through the baffle, the baffle is closed again under the action of gravity. The invention further provides a method for weakening the rarefaction wave of a hydrogen-oxygen detonation shock tube. Through the device and the method, the rarefaction wave of a hydrogen-oxygen detonation shock tube can be weakened, and the steady gas flow used in experimental study can exist longer.

The invention provides an experiment device and an experiment method for simulating thermal jet flow interference. The experiment device comprises a hypersonic wind tunnel, an experiment model, a bracket, a Laval internal nozzle, a model nozzle, a heater, an air storage tank, an air cylinder and a CF4 / SF6 gas cylinder, wherein an air source is compressed and expanded through the hypersonic wind tunnel and then becomes hypersonic airflow to provide an experiment with external flow; a CF4 / SF6 gas is mixed with air and then provides the experiment with internal jet flow; the specific heat ratio required by the experiment is obtained through controlling the molar mixing ratio and the temperature of the CF4 / SF6 gas and air, so that the requirements on specific heat ratio simulation of the jet flow in the experiment are met; and simulation of a jet flow interference experiment of the specific heat ratio of the jet flow is achieved in a common wind tunnel. The experiment method has the advantages of being relatively long experiment time, free of pollution, low in thermal load and low in cost, and therefore, the experiment method can be used as an effective means for evaluating the performance of the spray pipe of a hypersonic aerocraft.

The invention discloses a reaction unit for imitating a diagenetic process of sedimentary rock. The reaction unit comprises an alloy kettle set and a sample chamber. The sample chamber is inserted and placed in the middle of a containing cavity, and the outer wall of the sample chamber is tightly matched with the cavity wall of the containing cavity. An upper pressing rod is inserted from the upper end of the containing cavity and abutted against two ends of the sample chamber, and a lower push rod is inserted from the lower end of the containing cavity and abutted against the two ends of the sample chamber. A sealing assembly comprises an upper sealing assembly and a lower sealing assembly. The upper sealing assembly is composed of a graphite annulus, a middle metal ring and an upper red copper ring, wherein the graphite annulus, the middle metal ring and the upper red copper ring are sequentially placed inside a clearance between the upper pressing rod and the alloy kettle set in a sleeved mode. The lower sealing assembly is composed of a lower red copper ring and a lower pressing ring, wherein the lower red copper ring and the lower pressing ring are sequentially placed inside a clearance between the lower push rod and the alloy kettle set in a sleeved mode, and the lower red copper ring and the lower pressing ring are pushed tightly on a skirt portion of the lower push rod through a lower sleeve and a compression bolt which are arranged on the lower end portion of the alloy kettle set. The reaction unit has the advantages of being high-temperature-resisting, high-pressure-resisting, weak-acid-base-fluid-resisting, good in sealing property, long in experimental time and easy to dismount, and experimental design demands are completely met.

The invention relates to a processing technology of a high-temperature-resistant and long-life chromatographic gasket, and relates to the technical filed of gasket processing. A 1L glass stirring kettle is used, 10 g of high-purity graphite powder and 0.5-2g of high-purity Vespel raw material are respectively added through a charging port, high pure nitrogen is introduced at 30ml / min for protection, a 5A molecular sieve drying filter is added at a nitrogen gas path part, and the trace moisture in the gas path is removed to ensure that the moisture content of nitrogen is less than 10 PPB; because the moisture has a greater impact on the raw material, the raw material is heated to 400 degrees and stirred at a high speed for 3-6 hours; and then a sample is taken, the uniformity of the raw material is detected; after the specified index is reached, the heating is stopped, and the raw material is stirred until the temperature is room temperature; and the emptying and discharging are carried out. The high-temperature-resistant and long-life chromatographic gasket is prepared by a novel material formed by mixing a special material with pure graphite, and the service life of the chromatographic gasket is greatly prolonged.

Provided is an unrestricted suspension type initiative gravity compensation system. The system is composed of an unrestricted connecting module, a vertical constant tension suspension module, a horizontal follow-up module and a control module. The unrestricted connecting module comprises a connecting sleeve, an outer mounting frame, a force applying piece and a low friction bearing, and enables a spacecraft to carry out approximate unrestricted rotation round a center of mass. The vertical constant tension suspension module comprises a torque motor, a pinion and rack, a suspension hanging spring and a tension sensor, and enable the tensile force borne by the spacecraft in movement is equal to gravity. The horizontal follow-up module comprises a servo motor, a guide rail, a synchronous belt and a tilt angle sensor, and the suspension module is made to carry out horizontal movement along with the spacecraft to guarantee that the hanging spring is in a vertical state. The control module comprises an acquisition card, a driver and a motion control card. The design method of the unrestricted suspension type initiative gravity compensation system can compensate the gravity of the spacecraft in a ground test environment, further is used for reproducing the real movement of the spacecraft in the interspace microgravity environment, has the advantages of being stable in running, through in compensation and the like, and can provide the approximate unrestricted microgravity environment for movements with six degrees of freedom.

The invention provides a portable operation platform capable of realizing stacking of two-dimensional layered heterogeneous materials. The portable operation platform is characterized in that when a sample and a glass slide are replaced, a microscope can be removed from a rotary objective stage; when the two-dimensional layered materials are stacked, the angles of sample materials can be adjusted by a track type rotary control platform; when the materials are transferred and stacked, lifting and falling can be realized by the objective stage. The portable operation platform provided by the invention has the advantages that the aligning and calibrating time of the materials is reduced, the working space when the sample materials are arranged is enlarged, the failure of operators due to artificial mistakes is avoided, the stability in material stacking is improved, the flexibility of the experiment is increased, the difficulty of accurate positioning in stacking of the two-dimensional materials is effectively solved, and the application prospect in the aspect of manufacturing the two-dimensional layered heterogeneous materials is good.

The invention discloses a method for preparing a cement clinker in a laboratory. The method comprises the following steps: A, preparing a raw material, namely independently grinding different raw materials, screening, mixing, putting water into coal powder, kneading into balls, putting the balls into a high-temperature furnace, and mixing weighed materials and coal ash so as to obtain raw material powder; B, preparing a test sample, namely putting water into the raw material powder, uniformly mixing, putting into a mold, pressing, demolding, and drying the test sample in a drying oven; C, calcining a clinker, namely putting the dried test sample into a high-temperature furnace, and calcining according to procedures of staged heating and heat preservation; and D, cooling the clinker, namely performing sudden cooling by using a cooling fan, crushing the cooled clinker, uniformly mixing, and performing powder milling on the clinker, a retarded adhesive material and a mixing material, thereby obtaining expected cement. The method has great instruction significances for cement development in laboratories. The clinker can be prepared from conventional raw materials and industrial wastes as well, and the cement clinker prepared by using the method can completely meet auxiliary material design requirements.

The invention discloses a motion distribution method for track capture experiments of a main body and a separate body moving continuously on orbit. This method collects the current pose of the separated body model and the main body model at the current moment, obtains the theoretical pose of the separated body model and the main body model at the next time step, and calculates the relative position change distance in the X, Y, and Z directions; Quantitative proportion distribution of the movement of the main body and the separation body; control the main body and the separation body to complete the X, Y, Z movement and their respective angular movements, and reach the theoretical pose of the main body model and the separation body model at the next time step. This method can avoid the movement of the main mechanism and the separation body mechanism in the same direction, improve the utilization rate of the experimental space, obtain longer experiment time and more captured track points, and improve the service life of the main body mechanism and the separation body mechanism. The advantages of simple and fast, efficient and reliable operation.

The invention discloses a movement distribution method of a decoupling mechanism of a main body and a separated body in a linkage trajectory capture experiment. This method collects the current pose of the separated body model and the main body model at the current moment, obtains the theoretical pose of the separated body model and the main body model at the next time step, and calculates the relative position change distance in the X, Y, and Z directions; compares the separation body The positive and negative stroke margins of the model and the main model in the X, Y, and Z directions respectively, the decoupling mechanism for the planned movement in the X, Y, and Z directions is determined by the larger stroke margin; the main body mechanism and the separation body mechanism are controlled to complete the X, Y , Z-direction motion and their respective angular motions to reach the theoretical poses of the main body model and the separated body model at the next time step. This method can avoid the movement of the main mechanism and the separation body mechanism in the same direction, improve the utilization rate of the experimental space, obtain longer experiment time and more capture trajectory points, and improve the service life of the main body mechanism and the separation body mechanism. The advantages of high efficiency and reliability.