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 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 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 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 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 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 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.