50results about How to "Realize in situ observation" patented technology

The invention relates to a high-temperature in situ tension-fatigue test system and a test method thereof, and belongs to the technical field of scientific instruments and material test. The test system comprises a tensile loading and detecting unit, a fatigue loading and detecting unit, an in situ observation unit, and a high temperature loading and detecting unit. The tensile loading and detecting unit is powered by a motor, and realizes quasi-static loading through worms, gears and a ball screw; a piezoelectric ceramic drives a flexible hinge to realize medium and low frequency reciprocating motion in the tensile axial direction of a test piece in order to realize fatigue loading; and an optical microscope dynamically monitors the test process in order to realize in situ observation. The test system has the advantages of reliable principle, important scientific meaning, good application values, and accurate test and analysis of the relationship among mechanical performances of a test piece material, the microstructure of the material and the deformation damage mechanism in high temperature environment.

The invention provides a seabed lateral deformation and sliding observation device and method. The seabed lateral deformation and sliding observation device comprises an auxiliary ship and a seabed observation system, wherein the auxiliary ship is provided with an offshore drilling rig and a lifting device, and the seabed observation system is provided with a displacement measurement device, a data acquisition sealing cabin and a subsidence prevention frame. The displacement measurement device is of a rod joint combination structure with a cable, each joint point is provided with a three-axis acceleration sensor, and the displacement deviation of each joint point can be calculated according to the posture change of the corresponding three-axis acceleration sensor. The method includes the steps that the auxiliary ship is utilized for drilling a target point position so that the seabed observation system can be arranged, the seabed lateral deformation and sliding are observed and recorded through the displacement measurement device in the seabed observation system, fishing and recycling are conducted after the in-situ observation cycle is ended, and the deformation amount and the deformation process of seabed soil can be obtained by analyzing data. The seabed lateral deformation and sliding observation device and method provide a new thought and a new method for seabed lateral deformation and sliding observation and have the advantages of being long in observation cycle, capable of being repeatedly used, wide in observation range, high in accuracy and the like.

The invention relates to a variable-temperature tension-torsion combined-load in-situ testing device and method for mechanical properties of materials, and belongs to the field of precise instruments.The device adopts a vertical type structure, and comprises a tension unit, a torsion unit, a force and displacement detection unit, a high-/low-temperature loading system and a sealed cavity. The mechanical properties of the materials under the loading of a single tension or torsion load in a variable-temperature environment can be tested, and particularly can also be tested in a tension and torsion combined load mode in the variable-temperature environment. A variable-temperature load module carries out loading by adopting the high-/low-temperature loading system, continuous temperature changing from -100 DEG C to 300 DEG C can be achieved, and thus, a complicated environment of the materials in an actual service environment is simulated. A biaxial-tension and forward-and-reverse-torsionload test is ingeniously achieved through a symmetrical mechanical structure, the microarea position invariance of in-situ monitored materials is thoroughly guaranteed, and thus, mechanical behaviorsand damage mechanisms of specific microareas of specimen materials can be dynamically monitored in situ.

The invention discloses a mechanical-thermal composite in-situ loading system which comprises a stepping motor connected with the base, wherein a motor shaft of the stepping motor is connected with a bidirectional ball screw through a coupler; a left lead screw nut and a right lead screw nut are in threaded connection on the bidirectional ball screw; a left objective table and a right objective table are respectively arranged on the left lead screw nut and the right lead screw nut; a left end support and a left clamp are fixedly connected to the left objective table; one end of the base is fixedly connected with the left objective table and the other end of the base is freely suspended; a force sensor is arranged between the left end support and the left clamp; an electric heating film is fixed on the left clamp; a right clamp is fixedly connected to the right objective table; a grating ruler reading head of a grating ruler displacement sensor is fixed on the one side face of the right objective table; a grating ruler main body of the grating ruler displacement sensor is adhered to the base; and the right clamp can press a test piece which is arranged on the electric heating film of the left clamp. The in-situ loading of submicron scale can be realized.

The invention relates to a self-powered marine three-dimensional online observation system which is composed of a buoy, a wind power generator, a solar panel, a satellite communication module, a wave-activated generator, an optoelectronic composite cable, an underwater observation instrument, an underwater float ball, a bottom-supported underwater platform, a uninterruptible power supply (UPS) andan ocean current generator. The system acquires environmental parameters in the seawater by utilizing the underwater observation instrument, and transmits the obtained seawater environmental parameters to shore-based station through the satellite communication module. The system obtains wind energy, solar energy, wave energy and ocean current energy from the environment by utilizing the wind power generator, the solar panel, the wave-activated generator and the ocean current generator and converts the energy into electric energy for use by the system itself, and self power supply and long-term continuous in-situ observation of the marine three-dimensional online observation system are achieved.

A process for preparing nanometer-spaced electrodes comprises steps of preparing electrode pairs with larger gaps on nano materials which can not be destructed by electron beams, adsorbing raw material molecules induced and deposited by the electron beams on the surface of the electrode pairs, focusing the electron beams on gap areas of the electrode pairs and stopping irradiation by the electron beams to prepare and obtain the nanometer-spaced electrodes, when the gaps of the electrodes achieve the required width. Compared with the traditional process, the gaps of the electrodes can be observed in-situ in the process of preparation of the invention, thereby accurately controlling the gaps of the nanometer-spaced electrodes. Simultaneously, the invention has the advantages of convenient operation, simplicity and feasibility and high success rate, which is favorable for increasing preparing efficiency of the nanometer-spaced electrodes. The prepared nanometer-spaced electrodes have quite wide gap range from 2 nanometers to 100 nanometers, which is extremely significant for the control and application of nano and molecular devices.

The invention relates to a multi-energy complementary power supply ocean observing device, which belongs to the field of ocean engineering equipment. The multi-energy complementary power supply ocean observing device comprises a solar power generating device, a main buoy, a floating body, a cable, an anchor chain, a counterweight, a wave power generation module, a floating ball and an observation device, wherein the observation device comprises a buoyancy chamber, a supporting frame, a signal transmitter, a control chamber, a battery chamber, a acoustic doppler current profiler, a conductivity-temperature-depth system and an online pH detector. The multi-energy complementary power supply ocean observing device is characterized by further comprising a power generation adjusting chamber, a damping disc, a transparent sealing chamber and an acoustic releasing device. During working, the floating body moves up and down under an effect of waves, the main buoy moves with small amplitude under an effect of the damping disc, and the power is generated by means of relative motion between the floating body and the buoy. Electric powers generated by the solar power generating device and the wave power generating device are sent to the observation device after being treated by the power generation adjusting chamber. According to needs, the special observation device can be placed in the transparent chamber. During recycling, a signal is transmitted to the acoustic releasing device, the counterweight is released, and the observation device rises to the sea surface under an effect of buoyancy.

The invention relates to the field of raw material in-situ micro-nano experiment platforms and provides an in-situ liquid environment mechanics test platform of a transmission electron microscope. Thein-situ liquid environment mechanics test platform comprises a sample rod and a loading platform, wherein the loading platform comprises a lower chip, an upper chip and a loading device; a first groove is formed in the upper surface of the lower chip; a groove is formed in the bottom surface of the first groove; a lower film window and two through holes are formed in the bottom surface of the groove; a second groove and an upper film window are formed in the lower surface of the upper chip; the second groove and the first groove are used for forming a receiving space for mounting the loadingdevice; a thermal resistor is arranged on the upper surface of the upper chip; the lower surface of the upper chip is connected with the upper surface of the lower chip; the lower surface of the loading device is connected with the bottom surface of the first groove; a driving beam is arranged on the loading device; a sample loading area is arranged in the driving beam; the lower film window, thesample loading area and the upper film window are centered. The in-situ liquid environment mechanics test platform can achieve mechanics test of samples in the liquid corrosion environment; the problem that the transmission electron microscope is incapable of effectively carrying out in-situ mechanics test in the liquid environment at present is solved.

The invention discloses a method for realizing three-dimensional imaging of a symmetrical micro/nano sample through single X-ray measurement. The method comprises the following steps: by taking a coherent X-ray diffraction microscope as imaging equipment and utilizing the characteristics of free electron laser all-coherence, high flux and short pulse of X ray, acquiring two-dimensional diffraction data of the symmetrical micro/nano sample under single pulse irradiation, calculating an equivalent line of the diffraction data of the sample according to crystallographic symmetry characteristics of the symmetrical sample to determine spatial orientation of the sample, performing symmetry operation of a crystallographic point group of the sample on the two-dimensional diffraction data by utilizing the spatial symmetry of the sample to obtain three-dimensional diffraction data of the sample, and performing phase retrieval and image reconstruction on the three-dimensional recombinant diffraction data according to an oversampling and iterative algorithm to finally obtain a three-dimensional structure of the symmetrical sample. According to the method, three-dimensional reconstruction of the sample can be realized through single measurement only, the experiment efficiency of three-dimensional imaging is effectively improved, and a new thought is provided for enriching a three-dimensional imaging method.

The invention relates to a multifunctional uniaxial tensile test device for microstructure in-situ online observation. The device comprises a rack, a power transmission mechanism, a clamping mechanism and a force measurement mechanism, wherein the clamping mechanism comprises three detachable fixing bases corresponding to a pair of sliding tables and fixation bases, three pins and three insulating washers; the detachable fixing bases are in an inverted-T shape, can be mounted on top surfaces or side surfaces of the sliding tables/ the fixation bases through concave holes in the sliding tables and the fixation bases and are fixed through the pins; an upper clamping block and a lower clamping block used for clamping a test sample are fixed on the first two detachable fixing bases; the three insulating washers separate the three detachable fixing bases from the corresponding sliding tables or the fixation bases; the clamping mechanism and the force measurement mechanism are mounted at the upper parts of the sliding tables and the fixation base at the right end of a screw. The test sample keeps balanced, and microstructure in-situ observation is performed in the horizontal plane of the test sample in the tensile process; the clamping mechanism and the force measurement mechanism are mounted on side surfaces of the sliding tables and the fixation base at the right end of the screw, the test sample stands on one side, and the microstructure in-situ observation in a side plane of the test sample can be realized in the tensile process.

The invention relates to a low-temperature micro-nano indentation test system for large-stroke low-temperature drift under a microscopic assembly, belonging to the technical field of precision instruments. The low-temperature micro-nano indentation test system comprises a vacuum chamber system module, a sliding cryostat assembly and an indentation testing mechanical structure module. Large-strokequasi-static loading is carried out with a hybrid drive mode of a precision displacement drive platform and a voice coil motor in cooperation; a sample and an indenter are simultaneously cooled by a contact refrigeration method; an embedded integrated heating element and temperature measuring element are used to carry out continuous temperature varying closed-loop adjustment and weaken the influence of low temperature drift on test results; the microscopic imaging assembly is used to carry out accurate positioning of indentation locations and in-situ observation of surface topography. The low-temperature micro-nano indentation test system can be used for providing the experimental basis for studying the mechanical properties of materials in low temperature environment and the change rule of mechanical properties of materials with temperature, and has significant application value in research on the mechanical properties of key service materials of aerospace and polar and deep-sea scientific research equipment, superconducting transmission equipment, etc.

The invention provides a portable cutting-in testing system. The portable cutting-in testing system comprises a cutting-in testing device and a computer, wherein the cutting-in testing device comprises a base, and a working platform adjusting module, a cutting-in testing module, an in-situ observation module, a signal measuring and controlling module and a power supply module which are mounted on the base, wherein the working platform adjusting module, the cutting-in testing module, the in-situ observation module and the signal measuring and controlling module are connected with the power supply module respectively; the working platform adjusting module comprises a vertical adjusting module, a horizontal adjusting module and a working platform; and the cutting-in testing module comprises a piezoelectric ceramic driver for horizontal driving, an electromagnetic driving device for vertical driving and a pressing head. The invention provides the portable cutting-in testing system which can carry out in-situ cutting-in testing and has relatively high testing precision.

The invention relates to a mini-type precise in-situ nano impression and scratching testing device. The mini-type precise in-situ nano impression and scratching testing device comprises macro adjusting mechanisms, a precise pressing-in unit, a load and displacement signal detection unit and a scratch driving unit, wherein an x-directional macro adjusting mechanism is mounted on a substrate; a y-directional macro adjusting mechanism is mounted on an x-directional slide platform; the precise pressing-in unit is mounted on a y-directional slide platform of the y-directional macro adjusting mechanism; a force sensor and y-directional packaging piezoelectric ceramic are mounted at the front end and the inner part of a y-directional flexible hinge respectively; a displacement signal is detected by using the packaging piezoelectric ceramic; a pressing-in load is measured by the force sensor; precise driving is realized by the y-directional packaging piezoelectric ceramic and a pressing-in displacement is measured; a test piece is heated by a silicon nitride heating element so that an impression load displacement curve at a high temperature is obtained; precise scratching driving is realized through z-directional packaging piezoelectric ceramic; and deformation and damage conditions of a material at the high temperature can be observed in real time through heating the test piece by the silicon nitride heating element.

The invention discloses an optical microscope beam splitter device which comprises a beam splitter shell and a beam splitter cover plate. The beam splitter cover plate is used for guaranteeing that space in the beam splitter shell does not leak light. Two sets of beam splitting sheet fixing frames are arranged in the beam splitter shell in parallel, one set is used for white light imaging observation, and the other set is used for spectral measurement. A switching mechanism used for switching the two sets of beam splitting sheet fixing frames is further arranged in the beam splitter shell. An in-situ observation white light imaging focus point and a laser in-situ measurement point of a measured sample are kept consistent by switching a double-beam-splitting-sheet white light imaging observation module and a spectral measurement full-reflection mirror module, the utilization ratio of light intensity of incoming lasers and the efficiency of collecting light signals (raman scattering light or fluorescent light) from the sample are improved, and the testing space resolution and testing sensitivity are improved.

An in-situ observation device for crystal growth based on tiny droplets includes a droplet generation and control unit, a droplet bearing platform and an observation recording unit. The droplet generation and control device includes a micro dropper, a droplet generation controller and a dropper fixing holder. A part, located below the micro dropper, of the droplet bearing platform is used for placing a glass slide. The observation and recording unit includes an observation mirror and a data acquisition system, the observation mirror is located below the glass slide, and a lens faces to the glass slide. The observation mirror includes a microscope or a spectrometer. The droplet generation and control device can produce tiny droplets with the volume from a femto-liter level to a micro-literlevel, and the volume of the droplets can be accurately controlled by the diameter of the micro dropper and the droplet generation controller. A solution is quantitatively jetted on the glass slide, then the observation mirror is used for observation and the data acquisition system is used for recording, and the shape change and rule of the nucleation, growth and precipitation processes of the crystal formed from micro droplets can be obtained. The invention provides a simple and rapid technical means to realize in-situ observation of the crystal material growth process.

The invention discloses a method for crystallizing germanium antimony tellurium materials through electronic beam irradiation induction. The method comprises the steps that a substrate capable of carrying out microstructure representation or electrical property testing or in-situ performance testing is selected for preparing a germanium antimony tellurium amorphous film; the substrate for preparing the germanium antimony tellurium amorphous film is subjected to electron microscope sample pretreatment; a clean and smooth area of the surface of the germanium antimony tellurium amorphous film isfound in an electron microscope sample; the irradiation range, irradiation voltage, irradiation intensity and irradiation time are set in an electron microscope; the crystallizing process of the irradiation area of the electron microscope sample is observed in the electron microscope in real time, germanium antimony tellurium crystals meeting the crystallizing range, the crystal structure and thegrain size are obtained, and the process of crystallizing the germanium antimony tellurium materials through electronic beam irradiation induction is completed. The method provides experimental evidences for the study of the phase-change material crystallization mechanism and corresponding structural performance.

The invention discloses a high-temperature mechanical simulation and in-situ observation device which comprises a high-temperature environment box (13), a sample (12) transversely penetrates through the middle of the high-temperature environment box (13), the two ends of the sample (12) are both located on the outer side of the high-temperature environment box (13), and the two ends of the sample(12) are connected with a load unit through clamps (10). The high-temperature mechanical simulation and in-situ observation device provided by the invention can realize in-situ observation of high-temperature service behaviors, and different from a traditional high-temperature testing machine, the device uses the left-handed and right-handed screw rods, the two ends of a sample move relatively inthe loading process, and the center of the sample is kept still, so that in-situ observation of a specific area can be realized. The device is simple in structure, low in cost, easy and convenient tooperate and complete in function, and scientific and real experiment results can be obtained.

The invention belongs to the field of solar photocatalytic reaction, and discloses a mass transfer enhanced bubbling fixed bed photocatalytic carbon dioxide reduction reactor and method, and the reactor comprises a reaction cavity which is in an inverted circular truncated cone shape, and the interior of the reaction cavity is hollow to form a reaction space; the quartz light window is mounted at the top of the reaction cavity; the gas inlet base is mounted at the lower part of the reaction cavity; and the bubbling bed is arranged between the lower end of the reaction cavity and the upper end of the air inlet base. Compared with a traditional powder suspension system photocatalytic reaction system, the reactor has the advantages that the mass transfer performance of a catalyst interface is fully improved, the CO2 reduction reaction of the interface is always in a sufficient state of protons, electrons and CO2 molecules through regulation and control of a three-phase interface while efficient light absorption is achieved, and the activity of the CO2 reduction reaction of a solution system is effectively improved.

The invention discloses a method for in-situ study of an amorphization mechanism of a germanium-antimony-tellurium material under electron beam irradiation. The method comprises the following steps: selecting a germanium-antimony-tellurium crystal thin film of which the surface is deposited on a carbon supporting film copper carrying net with a standard size of a transmission electron microscope;carrying out surface pretreatment on the prepared film sample by adopting a plasma cleaning technology, and carrying out plasma cleaning by selecting argon; placing a pretreated electron microscope sample in the transmission electron microscope, and searching an area which is smooth in surface, free of carbon deposition, pollution and damage and uniform in thickness in the thin film sample to serve as an irradiation area; setting irradiation parameters, and inducing the material to be gradually amorphized; and observing and recording the evolution process of the amorphous structure of the material in situ, and analyzing the amorphous phase change mechanism of the material. According to the method, the gradual amorphization of the germanium-antimony-tellurium material is realized through electron beam irradiation, and the structural evolution process of the material amorphization is directly observed and analyzed by virtue of the transmission electron microscope, so that the convenientresearch method and a reliable experimental basis are provided for exploring the amorphization mechanism of the germanium-antimony-tellurium material.

The invention discloses a totally-enclosed inverted microscope with a multi-region scanning function, which comprises an inverted microscope body, and the inverted microscope body comprises a light source, and the light source is connected with an optical lens assembly through a connecting structure; and the optical lens assembly is connected with a transverse moving structure and a longitudinal moving structure. A fixedly arranged transparent objective table is installed between the light source and the optical lens assembly. According to the invention, the light source and the optical lens assembly move synchronously, and the objective table is immovable, so that in-situ observation of a liquid culture is realized; the inverted microscope is positioned in the completely closed box body and is not influenced by a high-temperature and high-humidity environment in the incubator, so that the service life of the inverted microscope is prolonged; by means of the specially-arranged longitudinal moving mechanism, the occupied area of the microscope is greatly reduced; and the inverted microscope and the culture medium are isolated, so that the culture solution is effectively prevented from being scattered on the objective table to cause microscope pollution.

The invention provides a scanning electron microscope electron detector with high collection efficiency. The scanning electron microscope electron detector improves the collection efficiency of secondary electrons or backscattered electrons and can further improve a signal-to-noise ratio and resolution of images. The scanning electron microscope electron detector comprises a grid mesh; a Faraday cup; a scintillator; a light guide column; a photomultiplier tube; a high-voltage power supply; a current amplification circuit board; and a stainless steel shell, wherein an electronic signal input end of the Faraday cup is provided with a convex screen, an electronic signal output end of the Faraday cup is arranged towards the scintillator, a photon signal output end of the scintillator is arranged towards an input end of the light guide column, an output end of the light guide column is connected to a signal input end of the photomultiplier tube, a signal output end of the photomultiplier tube is connected with a signal input end of the current amplification circuit board, and the photomultiplier tube is connected with the high-voltage power supply; and the high-voltage power supply, the photomultiplier tube, the light guide column and the scintillator are coated in the stainless steel shell, and the Faraday cup is fixedly arranged at the input end of the front part of the stainless steel shell.