30results about How to "Guarantee the accuracy of the experiment" patented technology

The invention provides a method for testing the interfacial fracture toughness of a second-generation high-temperature superconducting strip. The method comprises the steps of: (1), solidifying an enhancement layer, the thickness of which is much greater than the superconducting strip, at two sides of the superconducting strip, so that a composite beam structure is formed and used as a sample to be tested; (2), coating speckles at the narrow side of the sample in the length direction; (3), cutting the initial crack at one end of the superconducting strip of the sample, then, loading the sampleon a stretcher, and aligning a CCD camera to one side of the sample, on which the speckles are coated; (4), respectively developing type I and II interlayer fracture experiments; and (5), obtaining type I and II interlayer fracture toughness of the sample by calculation by using a digital image correlation method, wherein the result is the type I and II interlayer fracture toughness of the superconducting strip. According to the method provided by the invention, the enhancement layer, the thickness of which is much greater than the superconducting strip, is increased at two sides of the superconducting strip; therefore, the fracture toughness of the superconducting strip can be measured by a conventional experimental method; and furthermore, the experimental method is simple and high in accuracy.

The invention relates to the technical field of optical fiber testing, and particularly to an optical fiber uniform stress applying device. The optical fiber uniform stress applying device comprises an optical fiber clamp, an elastic deformation member, a fixed support and a linear guide rail. The optical fiber clamp and fixed support are fixed on two ends of the linear guide rail. The optical fiber clamp comprises an optical fiber clamping structure and a slide block structure and can clamp the optical fiber for sliding on the linear guide rail. Two ends of the elastic deformation member are respectively fixed with the optical fiber clamp and the fixed support. The optical fiber clamp can move on the linear guide rail relative to the fixed support. The optical fiber uniform stress applying device can apply a uniform stress on the optical fiber so that the optical fiber in a stable stretched state, thereby preventing optical fiber communication interference by an applied stress and ensuring high optical fiber testing quality.

The invention discloses a spray deposition 3D printing device based on self-excitation electrostatic field driven and application of a method on printing superfine silver grids. The limitation of existing material spray deposition 3D printing in the aspects of nozzle materials, substrate materials, printing stability and the like is broken through, only one electrode is arranged a whole system, acopper foil patch is connected with an alternating-current power supply to serve as an extraction electrode and is tightly attached to the shoulder of a glass nozzle in a wound mode, parameters of thecopper foil patch are simulated and optimized through finite elements to provide the optimal electric field focusing effect, an electric field with enough strength can be obtained under the conditionthat the voltage is smaller, the power supply does not make contact with a material, material spraying is completed only by means of electric field force formed by electrostatic induction, the wholeprinting process is not interfered by residual charges, stable printing under the condition of ultrahigh resolution is achieved, when a high-viscosity nano-silver paste is used as a printing material,single-row directional arrangement of nano-silver particles is achieved, a very large height-width ratio is achieved, and the height-width ratio can still reach 0.44 when the line width of a single-layer silver line is 3 microns.

The invention discloses a ship hydrostatic force performance experimental device which comprises a water tank and a ship body model placed in the water tank. A transverse inclination torque measuring device is arranged on the side, close to a stem, of the water tank; the ship body model comprises a ballasting system for guaranteeing that the ship body model does not incline, and a weight system for simulating loads on a ship, and the weight system comprises a stem weight, a midship weight and a stern weight which are located on the longitudinal axis face of the ship body model. An adjustable weight perpendicular to the longitudinal axis face is arranged in the middle of the ship body model, and the left side and the right side of the ship body model are both provided with at least one deck weight. According to the experimental device, the all true ship body model is erected, the hydrostatic force characteristics including buoyancy, stability, unsinkability, fastness, seaworthiness and operability in water are simulated, and operation is easy; a reinforced glass fiber plastic shell and metal upper layer equipment are adopted in the ship body model, so that the manufacturing price is low.

The invention discloses a nuclear power plant vapor generator washing and sediment reaction device which comprises three main parts, namely, a reaction component, an acid gas absorption and water discharge component and a liquid collection and metering component. The parts are delicately designed and connected, the number of the components of the experiment device is minimized on premise of ensuring experiment accuracy and precision, the volume of generated hydrogen is detected by using a drainage method, and thus precise, rapid and convenient tests on the content of Fe in sediment of a nuclear power plant vapor generator can be achieved.

The invention relates to the technical field of food detection, in particular to peroxide value detection pretreatment equipment which comprises a base; a liquid storage bottle used for storing a sample to be filtered; a liquid receiving bottle used for receiving the filtered sample; and a filtering device. An inlet of the filtering device is communicated with the liquid storage bottle, and an outlet of the filtering device is communicated with the liquid receiving bottle; the filtering device comprises at least two stages of filtering units which are connected in sequence and is used for removing water from the sample for at least two times; and a connector connected with a vacuumizing device is arranged at one end, close to the liquid receiving bottle, of the filtering device. The peroxide value detection pretreatment equipment has the beneficial effects that a sample can automatically flow through the filtering device from the liquid storage bottle by utilizing negative pressure and finally flows into the liquid receiving bottle, so that the filtering efficiency is improved, the sample is prevented from being exposed and oxidized for a long time, and the experiment accuracy is ensured; and water removal can be performed on a sample for at least two times through one-time operation, water removal is thorough, repeated filtering operation is not needed, time can be saved, the situation that a laboratory technician keeps in front of the filtering device for a long time can be avoided, and therefore the personal safety of the laboratory technician can be guaranteed.

The invention provides a cotton swab processor used in a hair removing process in animal experiment. The cotton swab processor used in a hair removing process in animal experiment comprises a base, wherein a cotton swab conveying device, a pressing mechanism and a water spraying mechanism are fixed on the base; the pressing mechanism and the water spraying mechanism are respectively located on twosides of the cotton swab conveying device; and the pressing mechanism is used for simultaneously triggering the cotton swab conveying device and the water spraying mechanism. Through the adoption ofthe cotton swab processor used in a hair removing process in an animal experiment disclosed by the invention, transmission and damping of a great number of cotton swabs in the animal hair removing process are realized, time and workload for hair removing are saved, and the situation that the accuracy of the experiment is influenced by skin injury caused by that the hair removing is too slow is avoided.

The invention relates to a method for determining a COD (Chemical Oxygen Demand) value, in particular to a method for determining the COD value by a laboratory microwave digestion method. The method particularly comprises the following steps: 1) pretreatment of a water sample, 2) sample introduction and dosing, 3) digestion, 4) cooling, 5) titration, and 6) calculation: oxidizing a reducing substance in the water sample with potassium dichromate in a strongly acidic solution, carrying out microwave digestion in a closed (sealed) state, taking a ferroin indicator solution as an indicator for excessive potassium dichromate, carrying out back titration with ammonium ferrous sulfate, and working out the COD value of the water sample according to dosage of ammonium ferrous sulfate. The experiment efficiency can be improved, the experiment accuracy can be ensured, and resources are saved.

An experimental apparatus for a photoelectrocatalysis reaction is connected to an electrochemical system and a gas chromatograph at the same time, so that when a to-be-treated gas is treated through a photoelectric reaction, a photocurrent and a gaseous product generated from the photoelectric reaction can be detected at the same time. The experimental apparatus is characterized by comprising a reaction part having a chamber and a sealing cover, both of which are made from a quartz material; an air intake part arranged on the chamber, communicating with the chamber and used for leading the to-be-treated gas to the inside of the chamber for a reaction; an air discharge part arranged on and communicated with the chamber for leading the gaseous product out of the chamber to the gas chromatograph for detection; and an electrode port part comprising a reference electrode port, a counter electrode port and a working electrode port, which are located on the side wall of the chamber in three directions, wherein the reference electrode port is arranged relative to the counter electrode port and the reference electrode port, the counter electrode port and the working electrode port are provided with a reference electrode column, a counter electrode column and a working electrode column, respectively, which are connected to the electrochemical system.

The invention discloses a toxicity detection device, and belongs to the technical field of biological chemistry. The toxicity detection device comprises that: a sealed space is arranged in an experiment table; a base is arranged in the sealed space; a plurality of distribution mechanisms are arranged on the base; a first rotary table mechanism is movably arranged on the base; a plurality of second rotary table mechanisms are arranged on the first rotary table mechanism; each second rotary table mechanism is provided with a plurality of reaction bottles; the positions of the detection mechanisms are kept consistent with the center position of one reaction bottle in the plurality of reaction bottles; an effluent discharge system is arranged in the first rotary table mechanism and the plurality of second rotary table mechanisms and is communicated with the plurality of reaction bottles; the central controller is connected with the plurality of distribution mechanisms, the first rotary table mechanism, the detection mechanism and the effluent discharge system. According to the toxicity detection device, toxicity detection can be carried out on compounds in a parallel multi-channel way, compound toxicity detection efficiency is greatly improved, and data testing accuracy and confidence levels can be improved.

The invention discloses an intelligent-type acupoint-selection moxibustion apparatus for the rat thorax and abdomen. The apparatus comprises a base, on which a rat fixation device, a mugwort control device and a smoke discharge device. The rat fixation device comprises a body fixation board fixed on the base through four support legs. The middle of the body fixation board is provided with a size-adjustable open hole, left and right sides of which are provided with open slots in parallel. Therefore, longitudinal beams are formed between the two open slots. The left and right longitudinal beams are fixed with bandages. The two bandages are adhered to each other through a magic plaster for fixing a rat. A discharge port is arranged behind the body fixation board. A detachable excreta collecting port is arranged below the discharge port.The intelligent-type acupoint-selection moxibustion apparatus for the rat thorax and abdomen has following beneficial effects: the rat can be fixed in a prone position such that the rat can remain in a physiological posture and subjected to acupoint-selection moxibustion; and due to the fact that the size-adjustable open hole is arranged in the body fixation board, the thorax and abdomen can be exposed according to needs on the basis of the figure of the rat so that experimental accuracy is ensured.

The invention discloses a ship hydrostatic force performance experimental device which comprises a water tank and a ship body model placed in the water tank. A transverse inclination torque measuring device is arranged on the side, close to a stem, of the water tank; the ship body model comprises a ballasting system for guaranteeing that the ship body model does not incline, and a weight system for simulating loads on a ship, and the weight system comprises a stem weight, a midship weight and a stern weight which are located on the longitudinal axis face of the ship body model. An adjustable weight perpendicular to the longitudinal axis face is arranged in the middle of the ship body model, and the left side and the right side of the ship body model are both provided with at least one deck weight. According to the experimental device, the all true ship body model is erected, the hydrostatic force characteristics including buoyancy, stability, unsinkability, fastness, seaworthiness and operability in water are simulated, and operation is easy; a reinforced glass fiber plastic shell and metal upper layer equipment are adopted in the ship body model, so that the manufacturing price is low.

The invention provides an apparatus for detecting the iron ion stabilization capacity of an ion stabilizer. The apparatus comprises a reaction chamber, a standard solution chamber and an auxiliary liquid-adding chamber, wherein the lower end of the standard solution chamber is communicated to the upper end of the reaction chamber through a left conduction pipe, the lower end of the auxiliary liquid-adding chamber is communicated to the upper end of the reaction chamber through a right conduction pipe, the left conduction pipe is provided with a left valve, the right conduction pipe is providedwith a right valve, the left conduction pipe and the right conduction pipe are respectively provided with a flow meter, the reaction chamber is connected to a pH system, and is provided with a stirrer, the stirrer comprises a motor and a stirring paddle, the stirring paddle is placed inside the reaction chamber, the motor is placed outside the reaction chamber, the motor is connected to the stirring paddle in the reaction chamber through a rotation shaft, and the reaction chamber is installed in a temperature control system. According to the present invention, with the apparatus, the experimental operation steps are substantially simplified, the experimental conditions are improved, the experiment process is precisely controlled, the accuracy of the detection is improved, the experimentalprocess is smooth, and the operation is simple.

The invention relates to a thin-wall pressurization structure elastic-plastic deformation experimental study device, which is composed of an oil injection module, a pressure gauge, an experimental test piece, a micro-deformation test instrument and a pressure loading system. The oil injection module, the experimental test piece, and the micro-deformation test instrument are fixed on a test bench. The oil injection module includes a manual pump and a stop valve. The experimental test piece is provided with a thin-wall pressurization structure. The micro-deformation test instrument is a contact-type high precision displacement sensor. The pressure loading system comprises a loading plate, a load display system, and fastening trapezoidal screws. The experimental study device also includes a plunger precise pressure pump, which consists of a plunger pressurization structure, a mechanical drive structure and a frame. The experimental study device provided in the invention has the characteristics of high pressure regulating precision, convenient operation and low development cost, and can be used in experimental study processes of thin-wall pressurization structure sensitivity and compressive sensitivity.

The invention provides a method and a device for calculating a capillary force and relative permeability curve. The method comprises the following steps: determining a core pore network model of which the cross sections of pores and throats are quadrangular star-shaped; performing single-phase flow simulation calculation on the model, and determining the absolute permeability of the rock core; sequentially performing displacement simulation calculation of multiple displacement types on the model, and respectively determining a change relationship between capillary force corresponding to each displacement simulation calculation and core water saturation, a change relationship between oil phase effective permeability and core water saturation, and a change relationship between water phase effective permeability and core water saturation; combining each change relation corresponding to each displacement simulation calculation with the absolute permeability of the rock core, and determining the change relation between the relative permeability of the oil phase and the water saturation of the rock core and the change relation between the relative permeability of the water phase and the water saturation of the rock core corresponding to each displacement simulation calculation. According to the method, the efficiency of acquiring the capillary force and the relative permeability curve of the core can be improved.

The invention relates to a dual-mode sample preparation and demolding method for an unsaturated soil triaxial experiment, and solves the problems of damage to a test piece and height reduction causedby demolding due to the phenomena of loosening and non-uniformity of the end part of the traditional sample preparation. The machine sample preparation precision is low, the manual sample preparationlabor amount is large, and the quality and quantity are guaranteed. The device basically comprises an upper baffle plate, a lower baffle plate, four upright post sample outlet holes, a convex three-petal inner die, a convex cushion block, a sample pushing top cover and a groove outer die. Looseness, density and non-uniformity of a sample manufacturing compaction end are considered; the demouldingprocess is vulnerable, and density deviation is calculated. Dual-mode sample preparation is applied to a sample pressing method, so that the accuracy of a test piece is improved. The device is different from a traditional three-section mold, the outer surface of the device is convex to be embedded with a double-mold outer cylinder, and more importantly, sliding demolding is facilitated. The deviceis composed of the double-layer mold and the cushion block, the inner mold and the cushion block can be embedded and can also be taken out in a sliding mode, thrust acts on the convex cushion block in the demolding process to push the three-section inner mold, and the defects of traditional sample preparation are overcome.

The invention relates to a special device for tumor transplantation of zebrafish larvae, and a working method of the special device. The special device comprises a box body and a transplantation body,the box body and the transplantation body are each of a rectangular concave body with baffles being arranged around, and the transplantation body and the box body are combined into a whole when the transplantation body is inserted into the box body. Four cuboid vertical columns are arranged at the four corners of the lower bottom face of the transplantation body correspondingly, and a plurality of grooves are formed in the inner bottom face of the transplantation body; and a plurality of drainage holes and a scale are arranged on the inner bottom face of each groove, and a plurality of sets of scale marks are arranged on the left inner side wall and the right inner side wall of each groove. According to the special device, the position of the larvae is fixed during tumor transplantation advantageously, and operation is convenient; and the dosage of transplanted tumor cells can also be quantified accurately. In addition, through the special device, the situation that the larvae are sucked mistakenly in the process of sucking excess liquid before tumor transplantation, and consequently, the larvae are damaged can further be effectively avoided; the transplantation time is saved advantageously, and the situation that the operation time is excessively long, consequently, the larvae die due to water shortage is avoided; and the culture device is ingenious in design concept, convenient to use, obvious in effect and good in effect, experiment accuracy is ensured, and the working efficiency is improved.

The invention discloses a full-automatic running-in testing machine for a steering gear, and belongs to the field of precision testing equipment. The full-automatic running-in testing machine comprises an automatic moving-in and moving-out mechanism, a PLC electrical control box, a loading mechanism, a rack, a touch screen control panel and a running-in mechanism. The full-automatic running-in testing machine adopts a full-automatic working mode, and workpieces are automatically moved in and out, automatically clamped and positioned and automatically subjected to a running-in experiment. The running-in mechanism moves through a servo motor, and the experiment requirements of the workpieces with different lengths can be met. The loading mechanism moves through a servo motor, and the experiment requirements of different pinion workpieces are met. In the aspect of electrical control, a PLC and a touch screen are adopted for control, the servo motors and an air cylinder are adopted as power sources, and the electrical control is responsible for all operation instructions and implementation of the equipment.

The present invention discloses a two networks packet switching method and a network device. A computer terminal is connected with a network switching chip through a switching isolation transformer, the network switching chip is controlled by control signals of a control unit to perform switching, and network channel between the computer terminal and the internal network or the external network is realized; in the control unit, control signals are input to a microprocessor by switching buttons and a dial switch, and a latch chip is triggered to send control signals to the network switching chip to control the working state. According to the present invention, a digitalization circuit design proposal mainly for integrated circuit chips is formed by applying physical layer chips and switching chips and combining the single board computer control technology without adopting the relay technology, therefore, frequent jumper connections of netting twine in experimental teaching can be performed in the premise of assuring the experiment efficiency and accuracy.

The invention provides a second-generation high-temperature superconducting strip interface fracture toughness test method, which includes the following steps: (1) solidifying a reinforcing layer with a thickness much larger than that on both sides of the superconducting strip to form a composite beam structure and serve as a Test sample; (2) Coat the speckle on the narrow side of the sample length direction; (3) Cut the initial crack at one end of the sample superconducting strip, then load the sample on the tensile machine, and the CCD Aim the camera at the speckle-coated side of the sample; (4) Carry out Type I and Type II interlaminar fracture experiments respectively; (5) Use the digital image correlation method to calculate the Type I and Type II interlaminar fractures of the sample Toughness, the result is the type I and type II interlaminar fracture toughness of the superconducting tape. In the present invention, by adding a reinforcing layer with a thickness much larger than the superconducting strip on both sides of the superconducting strip, the fracture toughness of the superconducting strip can be measured by a conventional experimental method, and the experimental method is simple and has high accuracy.

The invention discloses a toxicity detection device, and belongs to the technical field of biological chemistry. The toxicity detection device comprises that: a sealed space is arranged in an experiment table; a base is arranged in the sealed space; a plurality of distribution mechanisms are arranged on the base; a first rotary table mechanism is movably arranged on the base; a plurality of second rotary table mechanisms are arranged on the first rotary table mechanism; each second rotary table mechanism is provided with a plurality of reaction bottles; the positions of the detection mechanisms are kept consistent with the center position of one reaction bottle in the plurality of reaction bottles; an effluent discharge system is arranged in the first rotary table mechanism and the plurality of second rotary table mechanisms and is communicated with the plurality of reaction bottles; the central controller is connected with the plurality of distribution mechanisms, the first rotary table mechanism, the detection mechanism and the effluent discharge system. According to the toxicity detection device, toxicity detection can be carried out on compounds in a parallel multi-channel way, compound toxicity detection efficiency is greatly improved, and data testing accuracy and confidence levels can be improved.

The invention discloses an experimental device for ultrasonic detection of shale hydration micro-crack propagation characteristics under high-temperature and high-pressure water circulation effect. The experimental device is characterized in that the device can integrally monitor and simulate the internal micro-crack propagation condition under the shale core hydration action in a real deep environment in real time, studies the propagation mechanism of the internal micro-crack, and analyzes the influence on the shale permeability and the shale gas recovery efficiency. The device comprises a high-temperature and high-pressure hydration reaction kettle, a variable-temperature water injection circulating device and a mobile ultrasonic detection device, and the high-temperature and high-pressure hydration reaction kettle simulates a hydration action environment in which liquid water circularly flows and is in full contact with a sample under high-temperature and high-pressure conditions; the variable-temperature water injection circulating device is used for accurately controlling factors such as temperature, confining pressure, flow velocity, water injection pressure and water injection time which influence the expansion characteristics of the shale microcracks; and the mobile ultrasonic detection device detects the microcrack propagation condition in the shale core in real time, so that core hydration and crack propagation detection are synchronously carried out. The device is easy to operate and convenient to move, facilitates research on the shale hydration microcrack propagation characteristics under the high-temperature and high-pressure water circulation effect, and has great significance in deep oil and gas exploration and development.

The invention discloses a multi-fragment synchronous launch sabot device. The multi-fragment synchronous launch sabot device comprises a sabot body and a sabot separator matched with the sabot body, the sabot body comprises multiple enveloping bodies, a bracket, a base, a bottom push plate and a base sleeve, the multiple enveloping bodies are arranged on one side of the base and connected with thebase, the multiple enveloping bodies are sequentially distributed in the circumferential direction with one point as the center to form a semi-surrounded structure, the base sleeve is connected withthe other side of the base, the bottom push plate is arranged at the joint of a cylindrical barrel and a circular truncated cone barrel and is installed inside the base sleeve, and the bracket is arranged between the bottom push plate and the enveloping bodies and is installed inside the base. According to the multi-fragment synchronous launch sabot device and an assembly method thereof, the design of the multi-piece enveloping body is adopted, the experiment precision is guaranteed, enough flying space is provided for fragments, the replaceable bracket is adopted, the practicability of the device is improved, and the application range is enlarged; besides launching a large number of fragments, a plurality of shots in regular shapes can be launched by replacing the bracket; and the sabot separator adopts a threaded fastening installation mode and can be repeatedly used.

The invention relates to the technical field of experimental devices, specifically to a slider used for a steam suspension experiment. The slider for the steam suspension experiment comprises a slider main body which is a rectangular block, wherein the bottom part of the rectangular block is provided with a groove which is sunken to the interior of the rectangular block; the groove is of a hemispherical shape; the position of the center of the upper part of the slider main body is provided with a cylindrical fixed hole which is sunken into the slider main body; a circular-ring-shaped fixed clip is arranged in the fixed hole; a plurality of fixed sheets which obliquely extend upward from the edge of the bottom part of the fixed clip are arranged on the fixed clip; one surface, far away from the inner wall of the fixed hole, of each fixed sheet is provided with a fixed clip ball; and the fixed clip is made of plastic. The slider used for the steam suspension experiment provided by the invention solves the problems of overmuch required power and overlarge air resistance for slider suspension in the prior art, and has extensive application range in various laboratories.

The invention discloses production equipment with a scale sensing turn number service life detection function fora mechanical coding base, and relates to the technical field of special-shaped component processing and detection. The production equipment includes a base, a self-centering synchronous clamp, a centering internal expansion mechanism, a damping detection mechanism and a poke rod.A guide bar is arranged at the top end of the machine body; According to the production equipment with the scale sensing turn number service life detection function for the mechanical coding base, by arranging the counting detection mechanism, damping sensing and turn number detection of the mechanical coding base can be achieved through intermittent touch between a sliding block on the end face of the centering internal expansion mechanism and an L-shaped poke rod at the input end of the damping detection mechanism; under the rotation action of the poke rod, the transmission rod transmits to a toggle joint at the middle end of the connecting rod, so that the sliding seat applies downward pressure to the loading spring in the descending stroke to force the loading spring to deform, and the loading spring bottom end counting detection mechanism records the deformation quantity of the loading spring every time and compares the deformation quantity with a preset quantity; and the circle number service life of the to-be-detected mechanical coding seat under the effective stroke is recorded, so that the applicability is higher.

The invention relates to the technical field of water treatment, and provides a water sample treatment system. The water sample treatment system comprises an extraction mechanism, an analytical mechanism, and a linkage mechanism. The extraction mechanism comprises a first chamber which is provided with a water sample inlet and outlet, and a first extract inlet and outlet. The analysis mechanism comprises a second chamber which is provided with a carrier gas inlet, a carrier gas outlet, and a second extract inlet and outlet, wherein the carrier gas outlet is connected to a chromatograph column.The linkage mechanism is provided with a mounting component and a transport component. The mounting component is fixed to the transport component and used for fixing the extract. The transport component can move between the first extract inlet and outlet and the second extract inlet and outlet. The water sample treatment system connects the extraction mechanism with the analytical mechanism through the linkage mechanism, integrates the extraction and analysis functions, and has high automation degree. The water sample treatment system can also extract and separate organic matter, can effectively isolate the water, and solve the problem of water inflow of the chromatograph column. The extraction mechanism simulates laboratory extraction methods to ensure extraction efficiency and experimental accuracy.