52results about How to "Improve experimental efficiency" patented technology

This application belongs to the field of scanning probe microscopy technology, and particularly relates to a transverse scanning tunneling microscope and a scanning imaging method. The scanning tunneling microscope body includes a base, a first piezoelectric tube, a guide rail, a scanning imaging unit, and a sample stage. The fixed end of the first piezoelectric tube is fixedly mounted on the base; the free end of the first piezoelectric tube is fixedly connected to the lower surface of the guide rail. The sample stage is perpendicular to the guide rail and fixedly mounted at one end of the upper surface of the guide rail. The scanning imaging unit is placed on the upper surface of the guide rail. A probe is provided on the scanning imaging module, with the probe tip pointing towards the sample fixed on the sample stage. The scanning imaging unit drives the probe to perform insertion, retraction, or scanning imaging relative to the sample stage while the magnetic field direction is parallel to the sample surface. This application enables efficient scanning imaging of the sample surface when the magnetic field direction is parallel to the sample surface.

The utility model discloses a hydrochloric acid ammonia gas corrosion test case relates to test case technical field, including test case main part, support seat, waste gas treatment tank, support seat top both sides are connected with test case main part and waste gas treatment tank respectively. The utility model discloses a ammonia gas injection pipe and hydrochloric acid injection pipe inject proper amount of ammonia gas and hydrochloric acid gas into test case main part, wherein the hydrochloric acid conduit and ammonia gas exhaust pipe correspondingly connected of ammonia gas injection pipe and hydrochloric acid injection pipe are upside down distribution in test case main part, are favorable to the full mixing of hydrochloric acid gas and the ammonia gas below, form even corrosive gas environment, this can ensure that the corrosion effect that each part in test case receives is more consistent, thereby obtains accurate test result, wherein the test case main part inner wall has been daubed anticorrosive layer coating), can effectively prevent the corrosion of hydrochloric acid and ammonia gas to test case main part inner wall.

The application provides a gold mine rolling bottle leaching experiment system and experiment method, relates to the hydrometallurgy technical field, and the system comprises: the central controller and the multi-axis mechanical arm which are electrically connected; the central controller is used for obtaining and analyzing a preset experiment task to obtain a job instruction sequence; according to each job instruction, a control signal is sent to the multi-axis mechanical arm; the multi-axis mechanical arm is used for grabbing a rolling bottle to a weighing platform when receiving an empty bottle grabbing signal; according to a solid sample adding signal, a sample adding speed is determined, and the gold mine powder is added to the rolling bottle at the sample adding speed; when receiving a first moving signal, the rolling bottle is transported from the weighing platform to a liquid sample adding station; when receiving a liquid sample adding signal, the rolling bottle is injected with acid and alkali liquid; when receiving a cap screwing signal, the rolling bottle is transported to a cap screwing station and is sealed by screwing a cap; when receiving a second moving signal, the rolling bottle is transported to a preset clamping position of a rolling bottle machine to realize rolling bottle leaching. The application improves the experiment efficiency of the gold mine rolling bottle leaching experiment.

This invention discloses a thread friction coefficient testing machine, including a test drive unit, a main base, a pad, and a detachable fixture. The fixture includes an assembly base, a clamping actuator with an anti-rotation groove, and a circumferential locking pin, the tail end of which protrudes from the base. When the threaded pair slips, the locking pin is removed and the clamping actuator is rotated from the outside, allowing the fixture, along with the internally jammed fasteners, to be removed as a whole without destructive operation. This design not only achieves non-destructive and rapid unloading of the threaded pair, but its protruding clamping end and axial adjustment hole also expand the equipment's ability to test the friction coefficient of short bolts, significantly improving the maintainability, operating efficiency, and testing applicability of the equipment.

This utility model relates to the technical field of pipette holders, and discloses a pipette holder including a base. A rotating rod is rotatably connected to the top of the base, and a rotating handle is fixedly connected to the top of the rotating rod. A fixed plate is fixedly connected to the outer top side of the rotating rod. Multiple guide blocks are fixedly connected inside the fixed plate, and protective sleeves are fixedly connected to the bottom of each guide block. A pipette assembly is disposed inside the protective sleeve. A rotating disk is fixedly connected to the bottom of the rotating rod, and multiple slots are formed inside the rotating disk. A fixed ring is fixedly connected to the inner right side of the base, and a sliding groove is formed on the inner bottom side of the fixed ring. With this utility model, users no longer need to search among numerous pipettes; they can quickly rotate the required pipette to a convenient position, greatly saving operation time and improving experimental efficiency.

The application discloses a transverse stepped gap groove clamp for a classical four-point bending experiment, which comprises an upper clamp, a lower clamp and a positioning connecting piece, standard installation through holes are arranged on the upper clamp, the lower clamp and an experimental sample, the positioning connecting piece passes through the standard installation through holes to realize the connection of the upper clamp, the experimental sample and the lower clamp, stepped gap groove arrays are arranged on working surfaces of the upper clamp and the lower clamp in contact with the experimental sample, the stepped gap groove array comprises a plurality of grooves arranged along the length direction of the upper clamp and the lower clamp, the depth of the groove is arranged along the height direction of the upper clamp and the lower clamp, the depth of the groove is increased or decreased along the length direction of the experimental sample according to a preset gradient, and the height of the groove is arranged along the thickness direction of the upper clamp and the lower clamp. The application can meet the requirement that the four-point bending experiment cannot realize high-throughput gap simulation in a stress corrosion environment, and is used for improving the accuracy, reliability and efficiency of the experiment.

The present application belongs to the field of chemical detection and analysis, and particularly relates to a quantitative analysis method of tire surface spray substances. The quantitative analysis method of tire surface spray substances comprises the following steps: S1. establishing a standard curve; S2. pretreating a to-be-tested sample; S3. qualitatively analyzing the to-be-tested sample; S4. calculating the concentration of 6PPD in the to-be-tested sample; and S5. quantitatively analyzing each component of the to-be-tested sample. The present application provides a reasonable and rapid quantitative analysis method of tire surface spray substances, which can more effectively qualitatively and quantitatively analyze tire surface spray substances, provide basic data basis for optimizing a formula and adjusting a process, save unnecessary multiple formula and process adjustment tests, and improve experimental efficiency.

The application is a kind of simulation field drilling experimental device and experimental method for hydrate drilling fluid, which comprises a multilayer experimental cylinder, a water depth environment simulation device, a drilling running device, a drilling fluid feeding device, a slurry returning device and a data acquisition system. The multilayer experimental cylinder comprises at least two cylinder sections, and each cylinder section is independently configured with rock layers to simulate various formation environments. The water depth environment simulation device injects pressure into the multilayer experimental cylinder to simulate the environmental pressure of water depth. The drilling running device simulates downhole drilling. The drilling fluid feeding device is used to circulate and inject drilling fluid into the multilayer experimental cylinder through a drill pipe and a drill bit. The slurry returning device is used to circulate and return the drilling fluid to the drilling fluid feeding device and evaluate the hydrate content in the returned fluid. The application simulates the temperature and pressure environment of offshore gas field with low temperature and high pressure in the laboratory experimental device, and sets different rock layer compositions and experimental conditions of hydrate content, which can optimize the formula of drilling fluid and reduce the risk of hydrate generation during drilling.

The application relates to the technical field of scroll tube, in particular to a sand blasting device for scroll tube experiment, which comprises a base, a first motor is installed in the base, a rotating disc is rotatably arranged on the base, an output shaft of the first motor is connected to the rotating disc, a blanking groove is arranged on the rotating disc, at least two blanking grooves are arranged at intervals, a discharge pipe is fixedly connected to the base, an air inlet pipe is connected to the peripheral wall of the discharge pipe, a suction pipe is connected to one end of the discharge pipe, one end of the suction pipe is located above the rotating disc, a pressing plate is fixedly connected to one end of the suction pipe, one side plate surface of the pressing plate is attached to the rotating disc, a blanking hopper is fixedly connected to the base, the bottom of the blanking hopper is attached to the rotating disc, a blanking opening is arranged in the bottom of the blanking hopper, the sand blasting experiment of the scroll tube can be conveniently carried out, and the experimental efficiency is improved.

This invention discloses a vascular organ-on-a-chip that simulates human blood pressure, comprising a substrate, a channel layer, a cell dynamic culture module, a solution mixing module, and a cell mechanical property measurement module. The cell dynamic culture module includes a first culture channel and a second culture channel, with a serpentine channel connecting the upstream of the first culture channel and the upstream of the second culture channel. The solution mixing module includes two oppositely arranged solution mixing channels, which are respectively connected to the first culture channel and the second culture channel. The cell mechanical property measurement module includes multiple measurement channels arranged side-by-side, with one end of each measurement channel connected to the other end of one solution mixing channel and the other end connected to the other end of another solution mixing channel. This invention simulates the human blood pressure environment within the vascular organ-on-a-chip, enabling simultaneous cell culture under parallel gradient pressure within the chip, and combining the vascular organ-on-a-chip with cell mechanical property measurement.

The application discloses a device and method for preventing pollution and blockage of a cold stage system of a scanning electron microscope, the device comprising a main low-temperature gas path system and a normal-temperature nitrogen branch, low-temperature nitrogen discharged from the main low-temperature gas path system is divided into two paths, and is respectively connected to a cold hydrazine and a cold stage and is independently controlled through a flow valve. In order to solve the problems that a sample is easily polluted and a gas path is easily blocked during temperature rising in the prior art, a normal-temperature nitrogen branch is additionally arranged on the cold stage gas path through a three-way valve. During a system temperature rising stage, the cold stage low-temperature gas path is closed and the normal-temperature nitrogen branch is opened, dry nitrogen is blown to the cold stage, the cold stage is rapidly heated under positive pressure protection, meanwhile, the cold hydrazine continuously obtains low-temperature nitrogen, and an ultralow temperature is maintained. The above-mentioned measures ensure that a large temperature difference (such as > 150 DEG C) always exists between the cold hydrazine and the cold stage, ensure that pollutants are preferentially captured by the cold hydrazine, effectively protect the surface of the sample to be clean, and fundamentally prevent the gas path from being blocked due to moisture backflow.

This invention discloses a sample sorting device and method, belonging to the field of sample processing technology. In the sample sorting device, a loading / unloading mechanism moves the culture dishes between a storage station and a picking station; a shifting mechanism grips or releases the culture dishes and moves them between various stations; a positioning mechanism includes a lid-placement station and a placement station, the placement station for placing the culture dishes and clamping their bottom boxes, and the lid-placement station for placing the lids of the culture dishes; a detection mechanism for detecting the samples contained in the baskets within the culture dishes; and a sorting mechanism for moving the baskets from one culture dish to another. The sample sorting method, using the aforementioned sample sorting device, achieves automatic sample sorting through the coordinated operation of the loading / unloading mechanism, shifting mechanism, positioning mechanism, detection mechanism, and sorting mechanism, reducing labor intensity and experimental costs, improving experimental efficiency, and meeting the sorting needs of large quantities of samples.

The utility model relates to the technical field of determination tank, especially for a kind of slope farmland soil erosion determination tank, including fixed tank, the inside of fixed tank is slidably provided with sliding groove, the one side of sliding groove is fixedly provided with air blowing pump, air blowing pump is connectly provided with air jet pipe by pipeline, the inside of sliding groove is fixedly provided with several spray pipes, the bottom of sliding groove is fixedly provided with adobe tray, sliding groove can flexibly slide in fixed tank, can adjust position according to the size of adobe sample or experimental requirement, greatly improve the flexibility and adaptability of experiment, simultaneously, after sliding groove is received in fixed tank, device volume is greatly reduced, it is convenient to store and store, save space, the bottom of device is equipped with universal wheel, can be easily moved to different experimental sites, without complex disassembly and assembly process, greatly improve experimental efficiency, especially applicable to the situation needing to be experimented in multiple locations.

The utility model provides a reciprocating driving mechanism of an abrasion testing machine and a testing device of the reciprocating driving mechanism, two vertical inner sides of a reciprocating frame of the reciprocating driving mechanism are provided with sliding chutes, a cross-shaped motion sliding block is arranged in the sliding chutes of the reciprocating frame, and an eccentric wheel is arranged in a mounting hole in the center of the cross-shaped motion sliding block; the eccentric shaft is connected with the eccentric wheel shaft hole; reciprocating shafts are arranged on the opposite outer sides of the reciprocating frame. The testing device comprises a rack, a heating base, a linear reciprocating assembly, a testing groove, a pressure loading assembly, a testing clamp and a driving motor. The linear reciprocating assembly is simple in structure, the amplitude of the reciprocating linear motion is guaranteed through the double-eccentric structure design of the eccentric shaft and the eccentric wheel, and the test reciprocating stroke is adjustable. The reciprocating friction-wear testing machine is used for testing under a material extreme pressure condition and an oil product extreme pressure condition. The equipment is attractive in overall structural design, convenient to operate, high in automation degree, good in equipment operation stability and high in test precision, the actual working condition state of a material is simulated, and the test accuracy is improved.

The utility model discloses a kind of chromatography devices of flow rate and time controllable, belong to medical instrument technical field, including liquid storage bottle, the upper end of liquid storage bottle is provided with inlet, the lower end of liquid storage bottle is provided with pipeline one, the lower end of pipeline one is provided with microfluid pump, the lower end of microfluid pump is provided with chromatography column, the lower end of chromatography column is provided with pipeline two, the lower end of pipeline two is provided with detector, the utility model is by being provided with the structure that liquid flow rate and reaction time can be controlled, the accurate control of liquid flow is realized, controller can automatically adjust the speed of microfluid pump and electromagnetic valve start-stop time according to preset experimental parameter, ensure that liquid flows at the speed set, and complete reaction within predetermined time, this design improves the accuracy and repeatability of experiment, especially suitable for the chromatography experiment that needs accurate control flow rate and time, can effectively improve experimental efficiency and the reliability of data.

The utility model provides a laboratory water bucket platform of waste liquid can be collected belongs to laboratory equipment technical field, technical scheme is, a laboratory water bucket platform of waste liquid can be collected, including the cabinet body, the top of cabinet body is installed with the operation platform, the top of operation platform is installed with the platen, is provided with the wash basin and waste liquid collection pond on the platen, is provided with the faucet above the wash basin, the faucet is fixed in the top of platen, the bottom of wash basin is communicated with the upper end of drain pipe, the lower extreme of drain pipe is communicated with the sewer of cabinet bottom portion, the bottom of waste liquid collection pond is communicated with one end of collection pipe, the other end of collection pipe is communicated with waste liquid bucket, and waste liquid bucket is located inside the cabinet body. The utility model has the advantages of eliminating the back-and-forth operation between the water bucket platform and the waste liquid bucket for the experiment personnel, effectively improving the experiment efficiency, significantly reducing the risk of waste liquid spilling through the closed transmission path, and realizing safe and efficient waste liquid management.

The utility model relates to mass spectrum sample protein pretreatment technical field, concretely refers to a kind of mass spectrum sample protein pretreatment device, including detachable sleeve head structure, detachable sleeve head structure one side is equipped with cover through hinged structure;Detachable sleeve head structure includes sleeve body, and the middle part of sleeve body is horizontally equipped with filter plate one and filter plate two;Test tube is equipped below detachable sleeve head, and two clamping grooves are set in the inside of sleeve body, and sealing ring is clamped in clamping groove, and detachable sleeve head is clamped at test tube mouth place.The utility model solves the problem that the filter structure of existing pretreatment device is integrated with tube body, although simple structure, filter membrane is detachable, but sample is not easy to transfer to test tube after filtration, inconvenient operation, and poor applicability of microbiological experiment.

The utility model belongs to centrifugal experiment technical field provides an ultrafiltration centrifugal cup, include: lower cup body, lower cup body has the collection cavity for collecting filtrate, and the top of lower cup body is provided with the open mouth, flow channel ring, flow channel ring at least partial from open mouth stretches into lower cup body to install on lower cup body, and flow channel ring has the mounting hole along the axial penetration, cup body, upper cup body includes the body part and the installation part that are connected, the body part has the holding cavity for holding the sample to be filtered, and the top of body part is provided with the sample inlet, and the installation part is matched with the mounting hole, and the both sides of installation part are provided with the installation position for installing the filter membrane, and the installation part is provided with the sample groove that communicates with the holding cavity on, the utility model discloses to the processing of the biological protein solution of large solution volume, can be handled using an ultrafiltration centrifugal cup, need not use multiple ultrafiltration centrifugal tube, avoid the increase of the retention volume brought by multiple ultrafiltration centrifugal tube, improve the recovery rate.

This application relates to the field of sample cutting technology, and discloses a sample cutting mold and its sample sampling method. The sample cutting mold includes a cutting template; a plurality of cutting blades that are in close contact with each other are arranged on the cutting template; each cutting blade includes a blade body; the blade body is a three-dimensional polygonal prism, and the inner side of the blade body has a through hole; the first end of the blade body serves as a cutting edge, which is polygonal; the second end of the blade body serves as a sampling port; the cutting edge and the sampling port are arranged opposite to each other. Using the sample cutting mold provided in this application not only ensures the integrity of biological cell samples as much as possible, but also avoids sample loss, reducing costs compared to high-cost laser micro-cutting equipment. Furthermore, the sample cutting mold provided in this application is compatible with automation, reducing manual operation and improving experimental efficiency and repeatability.

This application relates to an intelligent seedling raising device for aquatic plant seed bank germination experiments, belonging to the field of seed cultivation technology. It includes a cultivation box with wheels, internally equipped with multiple layers of clamps, on which culture dishes containing cultivation troughs and germination paper are placed. An intelligent camera is fixed by a mounting bracket and faces the culture dishes to acquire images. A nozzle can move vertically under the action of a drive mechanism and spray water mist onto the culture dishes. A humidity sensor monitors the humidity inside the box. A heating and cleaning mechanism is linked to the nozzle position; when the nozzle is to the side of the camera, it is in a retracted state to ensure lens imaging; when the nozzle moves down below the camera, the mechanism unfolds and forms a shielding space, spraying and heating air onto the lens to remove moisture and impurities, keeping the lens clear. This device, through the coordinated action of multiple mechanisms, balances water supply, environmental control, and image quality to a certain extent, facilitating the stable conduct of aquatic plant seed germination experiments.

The present application relates to a kind of laser automatic frequency locking methods based on similarity recognition spectrum, comprising: S1, digital PID feedback controller is to laser output sweep voltage;S2, obtain the spectrum signal of laser output under current sweep voltage;S3, whether there is target spectrum in current spectrum signal based on similarity recognition algorithm is determined, if exists, execute step S4;If target spectrum is not identified, adjust sweep voltage and return to execute step S1;S4, based on the locking point of similarity coefficient peak position determination current characteristic spectrum;S5, after obtaining locking point, based on the frequency locking parameter of locking point determination current characteristic spectrum, control digital PID feedback controller is based on the control amount of the frequency locking parameter and carries out PID control locking.This method can achieve the finding of various spectral characteristic peaks and locking point, wide applicability, small environmental interference and method recognition efficiency is high.

The application discloses a microfluidic droplet controllable generating device and method based on piezoelectric driving, which comprises a fixed support module, a piezoelectric driving module, a chip clamping mechanism, a microfluidic chip module, a bearing table, a fluid conveying system, a control module and a displacement adjusting module. The application realizes on-demand droplet generation by precisely regulating pulse signals, and significantly improves the stability of droplet generation and experimental efficiency by combining with automatic control logic. The microfluidic chip module adopts a standardized appearance design, and has unified size, shape and interface specifications. Only by differentiating internal microchannels, different experimental requirements can be met, the chip can be quickly replaced, the operation complexity is reduced, and the experimental process is further optimized.

This utility model discloses a device for extracting umbilical cord mesenchymal stem cells, belonging to the field of biomedical engineering technology. It includes a transmission gear plate, a rotating structure, an adjusting structure, and a fixing structure. The adjusting structure drives a threaded block to move along a guide rod via a threaded rod, achieving precise adjustment of the centrifuge tube's tilt angle. The rotating structure, through a locking block and locking groove, supports multi-degree-of-freedom adjustment of the tube's opening orientation. The fixing structure employs air-filled balloon technology, using the inflated balloon to clamp the tube, preventing mechanical damage and adapting to different tube sizes. The device, driven by the transmission gear plate, rotates as a whole, and combined with dual-degree-of-freedom adjustment, significantly improves cell sedimentation efficiency and ease of operation, making it suitable for the efficient separation and extraction of mesenchymal stem cells from umbilical cord, bone marrow, and other sources.

This invention provides a non-invasive stimulation device based on acoustic field modulation using a concave fiber bundle. The device comprises a pulsed laser module, a laser modulation control module, a multi-channel concave fiber bundle, and a photoacoustic transducer coating. The pulsed laser, after processing by the modulation module, is input into the fiber bundle. Its output end is concave, and the photoacoustic transducer coating on the surface converts the laser into ultrasonic waves. The concave structure achieves initial geometric focusing of the ultrasonic waves, forming the geometric focus of the acoustic field. The modulation module has control channels corresponding one-to-one with the fiber transmission channels, allowing for dual-dimensional control of the emission time delay and pulse intensity of each channel's pulsed laser. This enables hardware-free axial and lateral scanning of the focus; intensity control maximizes the focus sound pressure and minimizes the sidelobe sound pressure. This invention significantly improves sound pressure gain and spatial resolution through the combination of concave fiber bundle geometric focusing and a high-efficiency photoacoustic transducer coating.

The utility model relates to the technical field of rock ultrasonic testing, especially to a kind of rock longitudinal wave test auxiliary platform;Including base, the top surface four corners of base have fixed rod, fixed rod top center is connected with slide bar, the top of base is symmetrical with a pair of clamping device, and the both ends of clamping device have cylindrical slider, and cylindrical slider is slidably connected with slide bar;The bottom center of clamping device has connecting block, and the short side center of base has fixed nut, and fixed nut is connected with connecting block between screw rod;There is a placing table between clamping device, and placing table is located above base.The utility model provides rock longitudinal wave test auxiliary platform, by placing table, rock is placed above placing table, and rock is clamped and fixed using baffle on placing table, and mutually cooperate with clamping device, can guarantee that longitudinal wave transducer and rock sample center are on the same axis, avoid artificial factor to influence experimental error, and simplify operation procedure, improve experimental efficiency.

This utility model discloses a maintainable chemical reagent and auxiliary agent classification and labeling device, belonging to the technical field of chemical reagent and auxiliary agent dispensing equipment. The classification and labeling device is snapped onto the edge of the opening at the top of a test tube or beaker. The device includes an outer panel with a slot, inside which a transparent baffle is embedded. A slot is formed on the inner side of the outer panel, into which a classification and labeling card is inserted. The name of the chemical reagent or auxiliary agent is written. The inner side of the outer panel is fixed to an outer clamp, and a magnetic suction plate is installed on the inner side of the outer clamp. This auxiliary agent classification and labeling device is easy to assemble and disassemble and can be reused multiple times. It is suitable for test tubes and beakers of different shapes, facilitating the classification and storage of different types of auxiliary agents by laboratory personnel, improving experimental efficiency and accuracy.

The utility model provides a kind of nuclear magnetic resonance spectrometer liquid nitrogen adding auxiliary device, it is related to liquid nitrogen adding support equipment technical field, including: support assembly, the support assembly includes hollow tube, T-shaped round bar is set in the hollow tube, the T-shaped round bar passes the upper end of the hollow tube;Connecting end fixed component, including round plate, the round plate is connected the upper end of T-shaped round bar, the round plate is provided with convex ring groove, two lugs are set in the convex ring groove, two The lug is connected notch plate respectively, two The notch plate is rotatably connected support round bar respectively, two The support round bar is respectively set extension pipe sleeve;Hose support assembly, including upper support and lower support, the hollow tube passes the upper support and the lower support.The utility model is in view of prior art's deficiency, develops a kind of nuclear magnetic resonance spectrometer liquid nitrogen adding auxiliary device, the utility model realizes the auxiliary fixing of hose and equipment connecting place, realizes the support of hose.

The utility model discloses a kind of multi-zone temperature control pipe type furnace, it is related to pipe type furnace technical field, comprising: equipment bin and heating bin;Heating bin is installed with multiple heat insulating plates, heat insulating plate is divided into multiple temperature zones in heating bin;Each temperature zone is provided with electric heating rod;Each temperature zone is installed with combustion pipe and temperature sensor;Combustion pipe is used to place sample;Through hole is provided on heat insulating plate, and the side of heat insulating plate is provided with plugging plate;Electric push rod is installed in equipment bin, and electric push rod is connected with plugging plate, for moving plugging plate, to control the closing and opening of through hole.The utility model can complete the heating process of multiple samples at a time, is conducive to improving experimental speed, improve experimental efficiency;The utility model is opened by through hole, so that heat is rapidly exchanged between adjacent temperature zones, even if partial electric heating rod failure occurs, it also does not affect the normal operation of entire equipment, is conducive to improving the use stability of equipment.

The utility model relates to test device field discloses an automatic vertical impact test device, including the bottom plate, the middle part fixedly connected with the main part of bottom plate upper surface, both sides outer walls of main part are all fixedly connected with the slide rail, the upper end sliding connection of slide rail outer wall has the sliding frame, the front end outer wall fixedly connected with the connecting frame of sliding frame, the front end outer wall fixedly connected with the slide cylinder of connecting frame, the upper end sliding connection of slide cylinder inner wall has the connecting column, the lower surface fixedly connected with the drop hammer of connecting column, the upper surface fixedly connected with the first connecting rope of connecting column, the middle part rotationally connected with the fourth pulley of first connecting rope outer wall, in the utility model, through drop hammer cooperation fourth pulley and motor and third gyro wheel and first connecting rope can carry out many experiments, through this mechanism can effectively improve the experimental efficiency of equipment, and cooperate slide cylinder can effectively reduce the error of equipment experimental data.

The application discloses a method for preparing a two-dimensional ultracold atomic gas by optimizing adiabatic compression, and belongs to the technical field of ultracold atomic physics and optical lattice. The method takes the quantum adiabatic evolution of a three-dimensional ultracold atomic gas in an adjustable period optical lattice as a physical model basis, and equivalently describes the motion of atoms in the lattice bound direction as a one-dimensional quantum harmonic oscillator system varying with an external parameter. In the lattice compression process, the instantaneous energy level structure of the system evolves with time, and the minimum energy gap region between the lowest energy level and the first excited state is the main source of non-adiabatic transition. A non-adiabatic parameter is introduced to simultaneously describe the relationship between the instantaneous energy gap and the scanning rate of the parameter, which is used for quantitative evaluation of the adiabaticity of the system, and the Landau-Zener non-adiabatic transition model is combined to design and optimize the scanning curve of the lattice compression. The scheme can effectively reduce the probability of non-adiabatic excitation in the compression process, and significantly shorten the lattice compression time under the premise of ensuring the adiabatic evolution of the system.