346results about How to "Avoid experimental error" patented technology

The invention discloses a device for measuring the permeability coefficient of rock material under the action of seepage-stress coupling, which comprises a triaxial pressure chamber balance system, a permeability coefficient acquisition system and a data acquisition and processing system, wherein the triaxial pressure chamber balance system loads samples axially or laterally through different stress paths; the permeability coefficient acquisition system is connected with the triaxial pressure chamber balance system so as to realize the determination for the quality of penetrating fluid of rock material sample; and the data acquisition and processing system regularly acquires the quality of penetrating fluid of rock material, calculates penetration flow and permeability coefficient, and draws a relationship curve of the permeability coefficient and time, and simultaneously, the data acquisition and processing system also forms a data format of the quality, the penetration flow and the permeability coefficient for storage and display. Such a measurement device can measure the permeability coefficient, as time and stress change, under different stress loading paths, has simple operation and reliable result, and can display the result visually. The invention also discloses a measurement method adopting the measurement device.

The invention relates to a film material micro-extending test system in the filed of film material technique, comprising a sample table, a sample structure, a drive mechanism, and a measuring observing device. A metal base in the sample table is absorbed in a vacuum absorbing table, and then fixed to a XYZ theta mobile platform via rivet; the mobile table in the sampling structure is connected with a support frame via a support spring; one end of the film sample is connected with the mobile platform, and another end is fixed to the support frame; a marker post is located at one end of the mobile platform close to the film sample; one end of the stretching bar in the drive mechanism, and another end is fixed to the XYZ mobile platform; an electromagnetic drive motor is connected with the XYZ mobile platform. The element preparation technique of the invention is easy, and convenient to operate. The invention has low cost and good linearity. The invention overcomes experimental error caused by plastic deformation of the support beam in the stretching process.

A high-low-temperature high-pressure adsorption and desorption testing device comprises an inflation system, a deflation system, an adsorption system, a desorption system, a temperature control system and a data collection system. The inflation system comprises a methane inflation unit and a helium inflation unit. The deflation system comprises a vacuum pump, a vacuum container and a vacuum gauge. The temperature control system comprises a high temperature unit and a low temperature unit. The adsorption system comprises a high temperature adsorption unit and a low temperature adsorption unit. The desorption system comprises a water drainage metering device, an electronic scale and a desorption gas flowmeter. The data collection system comprises a computer and a control unit. According to the high-low-temperature high-pressure adsorption and desorption testing device, test operations are easy and convenient, the test precision is high, adsorption and desorption tests under different pressures on the high-temperature and low-temperature conditions can be simulated respectively, real-time, accurate and automatic collection of test data is achieved, the more reliable data basis is provided for research on coal gas absorption and desorption rules, and the great practical significance is achieved for efficient gas exhausting, mining and utilization.

The invention relates to a subway carriage fire experiment table. The experiment table is same as a practical subway carriage in structure and is respectively provided with a door and a window at the left and the right; for the length, two ends of the experiment table are respectively provided with a front end door and a rear end door; the top inside the carriage experiment table is uniformly distributed with over three temperature probe strings inside the carriage; the upper part of the front end door is respectively provided with a temperature probe string, a speed probe string, an oxygen concentration probe and a monoxide concentration probe; one side of the exterior of the front end door is provided with a staff gauge; the middle-upper part inside the carriage experiment table is provided with an oxygen concentration probe and a monoxide concentration probe; and a camera system is arranged outside the window at one side of the experiment table. The experiment table is a large experiment table which first comprehensively and systematically researches heat release speed, smoke movement, fire detection and saving and the like of subway carriages, overcomes scale reduction and experiment error caused by a partial model experiment table, and ensures the repeatability of experiments.

A pollution and abrasion test system for an electro-hydraulic servo valve comprises four parts: a power source, an oil pollution degree control part, an electro-hydraulic servo valve mounting table and a system oil pollution degree detection part, wherein the power source part provides source power for the whole test system, the oil pollution degree control part is directly connected at the back of the power source part of the system, and controls the working oil pollution degree in test, the electro-hydraulic servo valve mounting table part is connected between a pollution level control part and the system oil pollution degree detection part, the system oil pollution degree detection part is connected with a return circuit of the system, that is between the electro-hydraulic servo valve mounting table and a system oil tank. The system is used for carrying out pollution and abrasion test on the electro-hydraulic servo valve, avoiding test error caused by particles pollution, the pollution degree of the test system is stabled in the pollution degree condition required by the test, the real-time monitoring to the pollution degree is achieved, the real-time adjustment is realized, and the test system is high in reliability, stable to operate, and easy to operate.

The invention discloses a kit for detecting a hepatitis c virus antibody as well as a detection method and an application thereof, and belongs to the technical field of in vitro diagnosis and detection. The kit consists of the following components: (1) a magnetic microsphere system: including a magnetic microsphere and an HCV antigen in indirect connection by virtue of a first bridged compound; and (2) a marker system: including an HCV fusion antigen and a marking tracer which are in indirect connection by virtue of a second bridged compound, wherein the HCV antigen and the HCV fusion antigen are combined with an HCV antibody on different sites. The kit and the detection method, by detecting the hepatitis c virus antibody through chemiluminescence immunoassay, have the advantages of high sensitivity, good specificity and broad detection scope.

The invention relates to a real human body breathing simulation device and method. The device comprises an exhaling pump, an inhaling pump and a heater system; a main body of the exhaling pump is a sealed gas cylinder, the interior of the gas cylinder is provided with a sealed piston, and the piston is connected with a rack through a bolt; a stepping motor outside the gas cylinder is in cooperative connection with the rack through a gear; a DSP controller is connected with a driver through a control line, and the driver is connected with the motor through a driving guide line; the other side of the gas cylinder is provided with two vent holes, and vent pipes of the two vent holes are connected with the gas cylinder through one-way valves respectively; the exhaling pump has the same structure as the inhaling pump while the tail end part of one vent pipe of the exhaling pump is provided with a heating element; a power supply is connected with the heating element by a time relay. Experimental errors brought by a conventional human body breathing device are overcome. The real response degree of experiment working conditions on real working conditions is improved, a pollution exposure level and a spreading rule of a human body breathing zone can be accurately reflected, and an important role is played for improving the building indoor air quality.

A sole abrasion resistance testing device capable of simulating various environments comprises an experiment table base; two friction experiment devices are arranged at the front end of the experiment table base and mounted at an interval; driving motors used for controlling the movement of the experiment table base, couplers and torque sensors are mounted at two ends of the experiment table base respectively; a hydraulic pressurizing device is mounted in the middle of the experiment table base; a foot model device is connected to the output end of the hydraulic pressurizing device and arranged at the tops of the friction experiment devices. Due to up-down movement of transmission rollers in the friction experiment devices, discontinuous friction of two friction tapes on a shoe, gap between the friction tapes, and replaceability of the friction tapes, the front and back soles of the shoe are abraded by the two friction experiment devices respectively; due to the pressure control of the hydraulic stress application device, and replaceability of a foot model, the walking rules of people can be well simulated; due to torque change measurement of the torque sensors, change of friction coefficient can be obtained indirectly to reflect abrasion degree, so that the obtained data are more direct and accurate.

The invention relates to a multifunctional fully-automatic Gram staining instrument. The instrument comprises a glass slide lateral movement device, a microbe automatic staining device, a glass slide entering and departing device, a push rod device and a liquid path control device, the push rod device pushes a coated glass slide positioned on the glass slide entering and departing device into the glass slide lateral movement device, the glass slide moves with a first glass slide rack on a reciprocating movement mechanism to the automatic staining device, is stained, cleaned and blow-dried, the liquid path control device cooperates a computer program in order to control a staining solution in a Gram staining solution bottle to carry out staining, water spraying, gas spraying, drying and other fully-automatic activities on the coated glass slide according to preset steps and time, and the push rod device moves the processed glass slide into the glass slide entering and departing device in order to carry out subsequent operation. The instrument has the advantages of fully-automatic realization of the whole Gram staining process, accurate delivery, cross infection avoiding, staining solution waste avoiding and manpower resource saving.

The invention belongs to the field of deep oil and gas exploitation rock mechanical testing, and particularly relates to a low permeability rock gas permeation test device and method under air and heat coupling effect. The test device comprises a triaxial pressure chamber, a high-pressure tank, a low-pressure tank, a confining pressure loader, an axial pressure loader, a temperature heater and a data transmission and acquisition processor; the high-pressure tank, the low-pressure tank, the confining pressure loader and the axial pressure loader are respectively connected with the triaxial pressure chamber, so as to realize gas pressure application and loading of different stress ways and different stress paths; the temperature heater is clung to the triaxial pressure chamber and seamlessly surrounds the triaxial pressure chamber, so as to realize test temperature control; the data transmission and acquisition processor is connected with the triaxial pressure chamber, the high-pressure tank, the low-pressure tank, the confining pressure loader, the axial pressure loader and the temperature heater respectively, acquires test data periodically, and stores and processes the data. The test device and method have the beneficial effect of realizing low permeability rock gas permeability tests with different temperatures and different stress loading paths.

The invention provides a high-temperature and high-pressure sealing device for small optical fiber sensor test. The sealing device is characterized in that the sealing device comprises a cylindrical or rectangular high-pressure tank, a sealing cover, a bolt, a bolt and a thermotank; the side wall of the high-pressure tank is provided with a circular hole, and an optical fiber sensor is arranged in the high-pressure tank; the sealing cover covers the high-pressure tank, and the center of the sealing cover is provided with a screw hole; the bolt is matched with the screw hole on the sealing cover, and the longitudinal center of the bolt is provided with a through hole; the pressure pump is connected with the circular hole on the side wall of the high-pressure tank through a pipeline; and the high-pressure tank is arranged in the thermotank.

The invention discloses a steady flow pumping test device for on-line full-hole continuous detection and a detection method thereof. The test device comprises a flow meter probe arranged at the bottom of a pumping well used for tests, and two water level monitors respectively arranged in an inspection well I and an inspection well II used for tests; the flow meter probe is connected to a servo motor through a cable, and a signal output end of the flow meter probe is connected with a photoisolator through a signal wire in the cable; signal output ends of the two water level monitors are also respectively connected with the photoisolator through signal wires, and an output end of the photoisolator is connected with an input end of a microcomputer system; and the pumping well is provided with a pumping system. According to the invention, after the measured flow velocity and water level electrical signals are sent to the microcomputer system, data processing and analysis are carried out to obtain the distribution situation of rock and soil bed permeability coefficients along a pumping well hole within the scope of burial depth. With the device and detection method disclosed by the invention, the permeability coefficients of rock and soil beds can be accurately, sensitively and conveniently measured.

The invention discloses a method for measuring pressure in a rotating state. The method comprises: installing a demarcating device on a test piece to form a pressure-tight demarcating chamber, feeding gas into the demarcating chamber, measuring voltage signal values of a sensor and gas pressure values of the corresponding chamber, fitting a curve to obtain a pressure calibration curve in a stationary state; feeding gases with different pressures in the demarcating chamber and rotating the test piece at different rotating speed, measuring the voltage signal values of the sensor corresponding the gas pressure in the present demarcating chamber under each rotating speed, fitting a curve to obtain a pressure calibration curve in the rotating state; obtaining an actual pressure value of the demarcating chamber through temperature of the demarcating chamber under each rotating speed, and modifying the pressure calibration curve in the rotating state; and combining the modified calibration curve and the signal values under each rotating speed measured by the pressure sensor in a test condition to obtain an actual pressure value of the pressure sensor. The method for measuring pressure in the rotating state makes test results capable of being reference, and ensures measuring precision of the test at the same time.

The invention discloses a pavement material dynamic water pressure washing tester which comprises a closed test box and a water supply system, wherein a mounting seat is fixedly arranged in the closed test box and is used for dividing an inner cavity of the closed test box into an upper forward washing cavity and a lower reverse washing cavity; a plurality of positioning barrels are arranged on the mounting seat; at least one positioning barrel is provided with a reverse washing barrel of which the upper end is closed and the lower end is communicated with the reverse washing cavity; the residual positioning barrels are provided with test piece carriers for fixing a pavement material test piece; a dynamic water inlet / outlet connected with the water supply system is formed in the forward washing cavity. The pavement material dynamic water pressure washing tester can truly simulate an actual washing condition of a pavement material; a test result is reliable; the pavement material dynamic water pressure washing tester is suitable for various types of mixtures.

An optical effect of LED in root system environment of soiless cultivation is disclosed. Its equipment is composed of dripping head, basins, lighting system, base basin, water circulation system with immersible pump in it, plastic tube as central axis, and LED boards arranged under said basin, in which the plant is growing via the holes on its bottom. Its method is use of the LED as light source to directly radiate the root system of plant.

The invention discloses a rock temperature-permeation-stress-chemical coupling multifunctional test system and operation method thereof. The multifunctional test system comprises a vertical loading device (1), a chemical solution isolating device, a pressure control device, a pressure chamber (4), a volume change determinator (5), a temperature control device (6) and a computer (7); multiple geo-technical test operations are completed by controlling the vertical loading device (1), the chemical solution isolating device, the pressure control device, the pressure chamber (4), the volume change determinator (5) and the temperature control device (6) through the computer (7). The multifunctional test system disclosed by the invention is reasonable in structure design, simple in operation, wide in application range, high in automation degree, capable of realizing overall process automatic control of multiple geo-technical tests, high in stability, and long in service life.

The invention discloses an anchoring method applicable to a large-tonnage (larger than 50 tones) FRP inhaul cable. The FRP inhaul cable is anchored with a clamping piece type anchorage device, a protection transition layer with the length no smaller than the length of an anchoring area of the clamping piece type anchorage device is formed at the anchoring end of the FRP inhaul cable, the protection transition layer and the FRP inhaul cable are integrated, and the clamping piece type anchorage device is anchored to the protection transition layer. After the FRP inhaul cable and the protecting layer are pressed into a whole, while the shearing strength of the FRP inhaul cable and a protecting layer interface is increased, the phenomenon that the FRP inhaul cable weak in transverse strength makes direct contact with load transmitting mediums large in rigidity in the anchoring area can be avoided, a stressed buffering layer is formed, and the FRP inhaul cable can be indirectly protected. The anchoring method used for anchoring the FRP inhaul cable has the advantages of facilitating construction and being high in anchoring efficiency and the like, long-term performance of an anchoring system can be guaranteed, the method can also be used for tensile tests on the FRP inhaul cable, samples can be prepared easily and conveniently, and compared with an adhesive type anchoring method, test errors caused by overlarge shearing deformation of resin can be avoided.

The invention discloses a fluid flow heat-exchanging experimental device with a ball socket / ball bulge flow control structure. The fluid flow heat-exchanging experimental device comprises a speed adjusting motor, a centrifugal pump, a testing section, an electric heating system, a flow meter, a water tank temperature control system and a water tank, wherein the speed adjusting motor is connected with the centrifugal pump; a water outlet of the water tank is communicated with an inlet of the testing section and an outlet of the testing section is communicated with the inlet of the centrifugal pump; the outlet of the centrifugal pump is communicated with the water tank; the testing section comprises an experimental channel upper cover plate and an experimental channel lower cover plate which are buckled with each other; a concave region is arranged in the middle of the experimental channel lower cover plate; the concave region is internally filled with a building block type ball socket / ball bulge flow control structure. According to the fluid flow heat-exchanging experimental device, a relative depth, a spanwise spacing and a streamwise spacing of a ball socket / ball bulge in a channel and the manner of combining the ball socket with the ball bulge are changed by replacing the ball socket / ball bulge, a spanwise filling block, a streamwise filling block and the like; a whole molding design method of the testing channel is improved by the design; building block type blocked structural design is adopted and the change of geometrical parameters of the channel can be finished conveniently and rapidly in a time-saving and labor-saving manner.

The invention discloses a triaxial experiment instrument pressure chamber for measuring rock specimen volume strain and an operation method thereof. The triaxial experiment instrument pressure chambercomprises a base and a pressure cabin arranged on the base, wherein the pressure cabin is a confining pressure sealed accommodating cavity; a precise volume pressure controller and a pressure sensorconnected in the pressure cabin jointly act; the pressure in the cabin is enabled to be strictly invariant by regulating the water inlet and outlet quantity, so that the water outlet quantity is the volume strain of a rock specimen; finally, the conversion is performed with vertical strain to obtain Poisson's ratio. The condition that errors caused by subjective influence of operators during the position selection in a traditional strain gage pasting method is avoided; the phenomenon of liquid leakage caused by strain gauge conducting wires is also avoided; meanwhile, all parameters can be obtained through once experiment; the data non-unified errors caused by many time of experiments are avoided; the experiment operation process is greatly simplified; the experiment efficiency is improved; the confining pressure is provided through water injection from water inlet holes. Compared with traditional method using oil pressure, the method has the advantages that the water sources are wide;high economic performance is realized; the control is easy.

The invention belongs to the technical field of research of soil analytical methods, in particular relates to an experimental technical method of quickly obtaining nuclide migrating parameters in clay by utilizing a flexible-wall permeameter. The experimental method comprises the following steps: I. pressing a clay material into a plurality of cylindrical samples with determined dry densities, and respectively putting into a pressure chamber of the flexible-wall permeameter for saturation; after finishing the saturation, uniformly adding tracer nuclides into the bottoms of the samples, and setting different pressure values to carry out an experiment, meanwhile, regularly collecting percolate at outlets, and calculating the percolation rates; II. stopping the experiment when the tracer nuclides occur in the percolate of the samples under the highest pressure, and taking the samples out and cutting into thin sheets of 1mm along the axial directions, performing dissipation, and measuring the concentration of the nuclides so as to obtain a nuclide concentration distribution curve of a plurality of groups of nuclides along the axial directions of soil columns; III. performing experimental calculation. The experimental method can be applied to the field of measurement of the nuclide migrating parameters.

The invention discloses a method for detecting an antigen expression level by using a flow cytometry. The method comprises the steps of firstly, carrying out immunofluorescent staining on a target cell, then detecting the stained cell by adopting the flow cytometry and carrying out data calculation and analysis, wherein when the parameter of the low cytometry is set, the resolution of a fluorescence channel to be detected is reduced; and obtaining a geometric average fluorescence intensity of an isotype control or a negative cell and a target cell to-be-detected antigen, figuring out respective geometric average fluorescence intensity rates with the geometric average fluorescence intensity rate of the isotype control or negative cell as a critical value, and if the geometric average fluorescence intensity rate of the target cell to-be-detected antigen is higher than that of the isotype control or negative cell by a preset value, the expression of the target cell to-be-detected antigen is achieved. According to the invention, the accuracy and the precision of target cell determination are effectively increased, experimental errors and subjective judgment errors of weak antigen expression are maximally reduced, and the flow cytometry is effectively promoted to be applied to multiple fields.

The invention provides a system for testing a yield of an up-conversion luminescence absolute quantum. The system mainly consists of four parts of a pump light source and a coupling light path, an integrating sphere and an optical fiber coupling collecting light path, a light splitting system and a signal and data acquiring system. The system is characterized in that a pump light source coupling system can be used for replacing the pump light source flexibly and adjusting the dimension of a beam spot; an integrating sphere system adopting an optical fiber coupling collecting light signal can be used for loading liquid, powder, blocks and film samples; optical components and parts including a neutral filter can be inserted in the front end of an optical fiber coupling system; and a light splitting and detecting system adopts a ''single grating and single detector'' structure, so that the system can finish testing the yield of up and down conversion luminescence absolute quantum in a high dynamic range and a high sensitivity of ultraviolet / visible / near infrared wave bands (300-1700nm).

The invention provides an indoor simulation system used for the process study between the sediments and the water surface of a lake. The indoor simulation system mainly comprises a water power disturbance system, an illuminating system, a constant-temperature water bathing system and an automatic sampling system. The invention has the advantages that the lake sediments are collected and directly put into a heat reserving box, the surface water power disturbance, the surface illumination, the surface temperature and the overlying water chemical features can be manually controlled, and long-time operation and multi-sampling are also available, without influencing the sediments and the surface process; the invention can, in fairly large scope, satisfy the requirements of the scheduled experimental conditions, so as to achieve the basic requirements of the researchers on studying the surface chemical or biological process. The system, being reliable and cheap, has advantages of compact structure, stable operation, long-time continuous running and long service life as well as convenient component disassembly-assembly and low cost.

The invention provides a detection method of 25-hydroxyvitamin D liquid chromatography tandem mass spectrometry in serum and a kit. The detection method of the 25-hydroxyvitamin D liquid chromatography tandem mass spectrometry in serum comprises the following steps that (1) serum samples are taken in a sample tube; (2) a precipitant containing an internal standard mixture is added into each sample, and vortexing and mixing is performed; (3) an extractant is added into each sample, and vortexing and mixing is performed; (4) supernatant is taken in the sample tube after the samples are subjectedto standing; and (5) after the samples are blown-dry by nitrogen at the room temperature, reconstitution fluid is added, after vortexing, the liquid chromatography tandem mass spectrometry is used for detection, and the content of 25-hydroxyvitamin D in serum is determined by comparing an internal peak area of the 25-hydroxyvitamin D and the 25-hydroxyvitamin D. The method for detecting the 25-hydroxyvitamin D liquid chromatography tandem mass spectrometry in serum can further improve the detection accuracy and precision and shorten the pretreatment time.

The invention relates to a measurement method for separation of convection heat and radiant heat for a wall surface. The measurement method is performed in a rectangular room with constant-temperature regulation and control, uniform air flow of supply air and return air by an indoor air conditioner and adjustable air sending volume and air sending temperature of the air conditioner, wherein one wall is taken as the measured wall surface, the surface temperature is higher than the temperature of other wall surfaces, the heat transfer quantity of the measured wall surface and the net heat radiation quantity of the measured wall surface and other wall surfaces are respectively measured by utilizing a heat flux density meter and a net radiometer, the convection heat of the measured wall surface is obtained by using the heat transfer quantity measured by the heat flux density meter to subtract the net heat radiation quantity measured by the net radiometer according to the heat balance principle of the wall surface, and the convection heat and the radiant heat of the measured wall surface are further separated. According to the measurement method provided by the invention, the load of a wall body is directly obtained by measuring the heat transfer quantity and the net radiation quantity of the wall body, the method is simple and convenient, the physical significance is clear, and errors between theory and reality caused by the load of the wall body when a reaction coefficient of theoretical calculation is adopted for calculation can be avoided.

The invention relates to a method and device for testing an engine in a complete vehicle and an engine bench. The method for testing an engine in a complete vehicle comprises the steps of controllingto generate environmental parameters of the engine according to set test data; generating a test environment of the engine in the complete vehicle according to the environmental parameters, wherein the test environment is used for simulating functions of other equipment matched with the operation of the engine; and controlling the engine to operate in the test environment based on the set test data. The technical scheme reduces the cost of testing the engine in the complete vehicle, and improves the test quality and efficiency at the same time.

The invention relates to a mathematics probability demonstration device, which effectively solves the problems of large workload and bigger artificial error in the existing needle throwing experimentdevice. The mathematics probability demonstration device is characterized in that the mathematics probability demonstration device comprises a simulation needle bar, a guide device and a needle throwing device, wherein the needle throwing device comprises a fixed casing; the outer side of the fixed casing is connected with fan blades; a cavity between every two fan blades forms a needle throwing cavity; both sides of each of the four needle throwing cavities are respectively sealed, and are integrally connected with the fixed casing; a first needle throwing hole is formed in the first needle throwing cavity and vertically faces the center of circle; a second needle throwing hole is formed in the second needle throwing cavity and slantwise faces the center of circle; a fourth needle throwing hole is formed in the fourth needle throwing cavity and slantwise faces the center of circle; the first needle throwing hole, the second needle throwing hole and the fourth needle throwing hole aremutually communicated; a blocking plate is arranged at an opening of the fourth needle throwing cavity, and the fourth needle throwing cavity is not sealed by the blocking plate; the outer wall of thefixed casing is connected with a first drive motor through a first rotary shaft; a floor box is arranged, and the experiment operability is stronger.

The invention discloses an evaluation instrument of soil mass corrosion resistance under wind erosion, water erosion and coupling erosion, and aims at simulating the real wind erosion, water erosion and coupling erosion environments of a soil mass, and reflecting the characteristic of resisting wind erosion, water erosion and coupling erosion, of the soil mass. The following technical scheme is adopted: the evaluation instrument comprises a horizontally-arranged base, wherein a soil sample box is arranged on the base; an inlet and an outlet are formed at the both ends in the length direction of the soil sample box respectively; the inlet is connected with a blower or a water source; the outlet is connected with a data collection and processing system for measuring the soil mass corrosion resistance; an included angle is formed between the soil sample box in the length direction and the horizontal surface of the base; the position of the inlet is higher than that of the outlet; the soil sample box comprises a soil sample chamber for placing a soil sample; the soil sample chamber is communicated with the inlet and the outlet; a rainfall frame is arranged at the upper end of the soil sample chamber; the rainfall frame is fixed on the base through a pipeline; the pipeline is connected with the water source; a plurality of spray heads communicated with the pipeline are arranged on the rainfall frame; the spray heads are located at the upper end of the soil sample chamber.

The invention belongs to the technical field of gene sequencing and particularly discloses a gene sequencing library preparation device. The device comprises a card case holding unit, a card case locking unit, a liquid supply drive unit, a card case rotation drive unit and a controller, wherein the card case holding unit comprises a holding support and a holding groove located on the holding rackand used for holding a card case; the card case locking unit is used for locking the card case in the holding groove; the liquid supply driving unit comprises a first drive mechanism for driving an injection body of an injection unit of the card case and a second drive mechanism for driving of injection head communicated with the fluid of the injection body to rise and fall, so that the injectionbody performs injection and suction operation on accommodating grooves in a circular base plate of the card case; the card case rotation drive unit is used for driving the circular base plate of the card case to rotate around the axis, and the injection head can perform injection and suction operation on multiple accommodating grooves in the circular base plate; the controller controls the workingstates of the card case holding unit, the card case locking unit, the liquid supply drive unit and the card case rotation drive unit. The gene sequencing library preparation device can realize automation of library preparation.