59results about How to "Simple test conditions" patented technology

The invention belongs to the technical field of corrosion testes of metal materials, and relates to a testing apparatus for dynamic galvanic corrosion. A rotary electrode sample is embedded in a rotary electrode embedded seat; a non-testing surface of the rotary electrode sample is provided with a threaded hole to realize threaded connection with a rotary shaft; a positive electrode of a galvanic corrosion measurement instrument is connected with the rotary electrode sample through an electric brush; a carborundum grinding column is fixed on two sides of a fixed electrode; a channel is disposed between a fixed electrode embedded seat and a support with adjustable height; the fixed electrode and a cooper conductor are electrically connected through a spring; a negative electrode of the galvanic corrosion measurement instrument is directly connected to the fixed electrode; and the support with adjustable height and the fixed electrode embedded seat are connected by a screw with high dense threads. A testing method comprises three steps of installing the testing apparatus; setting testing conditions and controlling rotating speed; and recording data. The testing apparatus is simple in structure and convenient for operation; the testing method is reliable in principle and strong in practicability; the testing conditions can be realized easily; cost is low; testing efficiency is high; and the testing apparatus is environment-friendly.

The invention provides a method for determining the number of times of flowing deformation of high-temperature creep instability points of an asphalt mixture. The method comprises steps as follows: firstly, a shear strength parameter of the asphalt mixture and a shear stress value on a failure surface under the most unfavorable load effect are obtained through an unconfined compressive strength test and a uniaxial penetration test; the high-temperature deformation instability characteristic of the asphalt mixture is analyzed through a uniaxial dynamic creep curve of the asphalt mixture under the cyclic load effect at a certain stress level, and a third-stage instability point of the asphalt mixture and the corresponding number of times of flowing deformation are determined; finally, through five uniaxial dynamic creep tests under cyclic load effects at different stress levels, a quantitative relation, that is, a shear fatigue equation, between numbers of times of instability flowing deformation and shear stress levels on instability failure surfaces is established. With the adoption of the method, a pressure shear fatigue equation of any asphalt mixture can be obtained, so that the number FN of times of flowing deformation of high-temperature creep instability points of the corresponding asphalt mixture under the cyclic load effect at any stress level can be predicted.

The invention belongs to the technical field of environmental protection, and relates to a thermal regeneration technology of an asphalt material, in particular to a device and a method for evaluatingdiffusivity of a regenerant in aged asphalt by eliminating interface influence. In the prior art, after a regenerant and aged asphalt are naturally mixed and dissolved, an asphalt sample is sampled,the regenerant left on the interface of the asphalt and regenerant will influence the testing result severely. According to the technical scheme, the method sequentially comprises the following stepsthat a gasket is arranged on the upper portion of an asphalt sample containing device, and aged asphalt is poured into the asphalt sample containing device till the aged asphalt is flush with the upper surface of the gasket; a regenerant sample containing device is arranged at the upper part of the gasket, and a regenerant is added; high-temperature regeneration treatment is carried out on the aged asphalt added with the regenerant; after the regeneration treatment is finished, the regenerant is removed, and then the miscible substance of the asphalt and the regenerant at the corresponding part of the gasket is removed; an asphalt sample in the asphalt sample containing device is collected for performance test, so that the diffusivity of the regenerant in the aged asphalt is evaluated.

The invention discloses a method for predicting generation time of instability type ruts on bituminous pavement, relates to a method for determining or analyzing materials by means of determination ofchemical or physical properties of materials, and belongs to the technical field of road engineering. Load effect frequency corresponding to a start point of a third phase of an asphalt mixture creeptest is an instability life, by means of an indoor simple performance test, a prediction model of indoor asphalt concrete test piece uniaxial and triaxial dynamic creep test instability life in a test temperature range is obtained, only a certain temperature and a stress state are provided, the indoor mixture test piece creep third phase start point can be directly predicated, and finally a finite element analytical method is used for obtaining a stress state of a real pavement model under a standard axle load effect and obtaining instability life of a real pavement by combining real ambienttemperature and traffic volume condition; a feasible scheme with simple test condition and operation convenience is provided for predicting real pavement rut instability life.

The present invention provides a transgenic cotton (including hybrid cotton) seed purity identification method. Said method incldues the following steps: using aminoglycoside antibiotics (kanamycin, etc) to prepare seed-soaking aqueous solution with proper concentration, soaking seed, using fresh water sand containing no salt content as germinating bed, sowing, then retaining required temp. and humidity required for germination, after about 7 days the cotton seedling cotyledon is completely patulous, investigating cotton seedling and counting, according to the yellow spot rate identifying purity of seed. It is simple, has no need of disinfecting cotton seed, has no need of making sterile operation and can directly use running water to prepare seed-soaking solution.

The invention discloses an implementation method of a white light LED capable of regulating a color temperature, regulating a color rendering index and regulating brightness. The method 1 comprises the steps of: packaging and combining more than two LED chips coated with different color phosphors, each the phosphor with a single color excited by each LED chip in the combination generates a light color being the same as the color of the phosphor; and mixing the different-color light through circuit driven to generate full spectrum white light; or the method 2 comprises the steps of: packaging and combining a LED chip coated with a transparent adhesive tape with two or more than two LED chips coated with different color phosphors; and mixing the light with different colors in the combinationthrough circuit drive to generate the full spectrum white light. The method provided by the invention can perform light mixing through regulation of the current ratio of different light colors to achieve the random and adjustable white light color temperature, the color rendering index in the same color temperature scheme can be regulated, the brightness of different color temperatures can be randomly regulated. Compared to a traditional LED achieving white light, the white light mixed through circuit drive is easily implemented and more effective.

The invention discloses a method for testing the size of an MAC address table of a switch product. The method comprises the following steps that: S1. tested equipment and a network packet tester are started, and any three ports in tested ports of the tested equipment are in one-to-one correspondence connection with three ports in test ports of the network packet tester, wherein the three ports of the network packet tester are respectively set as P1, P2 and P3; S2. a flow test mode of the P1 and the P2 is set as an opposite test mode, and the P1 is adopted as a learning port, the P2 is adopted as an action port, and the P3 is adopted as a monitoring port; S3. parameter information of the P1 and the P2 is configured; S4. after parameter configuration, flow test is performed; and S5. results are calculated, the number of frames over flown from the P3 is subtracted from the number of frames received by the P1, such that the size of the MAC address table of the tested equipment can be obtained, and then, the size of the MAC address table can be obtained, and the test is completed. The method for testing the size of the MAC address table provided by the invention is advantageous in easiness in test environment construction and realization of test conditions , and operational simplicity.

The invention relates to a device and method for testing the dynamic sound tightness of a closure member of a whole vehicle, and the device consists of an air leakage testing system and a supersonic detection system. The air leakage testing system comprises a fan, an air supply flexible pipe, a connecting plate, a silicone tube, and a micromanometer, wherein the fan, the air supply flexible pipe, the connecting plate, the silicone tube and the micromanometer are connected sequentially. The supersonic detection system comprises a supersonic signal generator, a supersonic detector, and a flexible detector. After the air leakage testing system is connected with a to-be-tested vehicle, the air leakage testing system supplies air to the vehicle quantitatively and enables the pressure on the surface of the closure member to reach a specified value. At this moment, a sealing strip of the closure member of the whole vehicle is in a dynamic sealing state, and then the supersonic detection system detects the supersonic leakage of the closure member of the whole vehicle and evaluates the dynamic sealing effect. The device is easy to implement, is low in cost, is simple in test conditions, and is good in result repeatability.

The invention discloses an admittance spectrum theory-based method for researching performances of an organic semiconductor. The method comprises the following steps of: establishing a theoretical admittance model based on an SCLC (Spatial Charge Limiting Current) theory, see formula 1; fitting the capacitance, the conductance and the imaginary part or real part of the impedance of an organic semiconductor device by adopting a principle of least squares, so as to obtain the carrier mobility and the dispersion parameters of the organic semiconductor. The method has the advantages that firstly, the carrier mobility of the organic semiconductor in a real device is directly measured, so that the transportation performance of the organic semiconductor can be reflected truly; secondly, not only the carrier mobility of the organic semiconductor can be measured, but also the dispersion parameters which present the performances of the organic semiconductor can be measured; and thirdly, compared with a traditional TOF (Time of Flight) technique, the cots can be saved, for one reason, the TOF requires that the thickness of an organic semiconductor to be tested achieves the micron level, such is expensive in price for some materials, especially for new materials.

The invention relates to the field of gas sensors, in particular to a gas sensor for detecting trace benzene. The gas sensor for detecting the trace benzene comprises a gas sensitive membrane, a first electrode and a second electrode, wherein the gas sensitive membrane, the first electrode and the second electrode are sequentially distributed from top to bottom. The second electrode is prepared through an aluminum plate by means of anodic oxidation. The first electrode is prepared through the practice that a direct-current magnetron sputtering process is carried out on precious metal on the surface of the second electrode. The gas sensitive membrane is formed after the surface of the first electrode is coated by a processed carbon nano tube. The gas sensor is short in detection cycle, low in production cost, simple in operation and capable of quickly and accurately detecting the trace benzene.

The invention discloses a two-dimensional retaining structure soil pressure and displacement visualization testing system. The two-dimensional retaining structure soil pressure and displacement visualization testing system comprises an outer frame, a retaining structure force measurement plate with a multipoint load detection function is arranged in the outer frame, a retaining structure displacement control assembly is arranged between one side of the retaining structure force measurement plate and the outer frame, and a rectangular stuffing box is formed by the other side of the retaining structure force measurement plate and the outer frame. Simulation sandy soil with a macroscopic plane stress-strain characteristic simulation function for sandy soil is arranged in the rectangular stuffing box, a loading assembly is arranged on the upper portion of the rectangular stuffing box, and shooting-lighting systems and a shooting device are further arranged in front of the outer frame. The value and distribution of soil pressure of multiple measured points on the same vertical section can be measured simultaneously, the action of side friction can be accurately eliminated by adopting the two-dimensional simulation sandy soil as stuffing, and the position of a slipping crack surface is visually showed. The two-dimensional retaining structure soil pressure and displacement visualization testing system is high in reliability and repeatability and is a new testing system provided for soil pressure study.

The present invention discloses a method for detecting dsRNA virus of edible fungus, the dsRNA virus of edible fungus can be detected by use of dsRNA monoclonal antibody J2 by dot hybridization, and the method is as follows: an edible fungus detection sample is prepared, the edible fungus detection sample is applied to a hybridization membrane, a closing liquid is used to fast close redundant nonspecific DNA binding sites on the hybridization membrane, the hybridization membrane is respectively incubated with the dsRNA monoclonal antibody J2 and goat anti-mouse IgG for color development, color changes are viewed by naked eyes, and toxic situations of the edible fungus can be determined. A plurality of samples can be detected by the method simultaneously, and the method has the advantages of convenient operation, fast and convenient operation, no need of special instruments and equipment, clear positive signals, easy judgment and the like.

The invention discloses a method for an in-situ test of broadband transmission line parameters of a double-conductor type cable, and belongs to the technical field of electromagnetic compatibility. The method includes: a connecting line is connected to a vector network analyzer for calibration, one end of a tested cable is connected with the connecting line, the other end of the tested cable is connected with a calibration member, and the test of a single-port scattering parameter is conducted; then a double-port scattering parameter of the tested cable without eliminating the influence of connectors is calculated; and finally, the double-port scattering parameter without the influence of the connectors is obtained via a parameter optimization process, and the transmission line parameters of the tested cable can be calculated. According to the method, extra engineering amount brought by dismounting and re-installation of the installed cable can be avoided, and the test process is convenient and fast; and the influence of the connectors is eliminated so that the transmission line parameters of the cable can be accurately obtained in the frequency range of hundreds of MHz.

The invention discloses a method for producing bio-organic chrome and a special bacterial strain thereof. The bacterial strain provided by the invention is Saccharomyces cerevisiae YSI-3.7 CGMCC No.2687, which has the capability of producing organic chrome with high yield. The method for producing the organic chrome is to culture the Saccharomyces cerevisiae YSI-3.7 CGMCC No.2687 to produce the organic chrome. The organic chrome produced by the method has the advantages of simple testing condition, low cost and high yield. The method for producing bio-organic chrome and the special bacterial strain thereof have important economic significance and social significance.

The invention discloses a standard colorimetric method for measuring the content of a carbonyl compound in industrial methanol, belonging to the field of industrial methanol. The standard colorimetric method comprises the following steps of: firstly, preparing a series of standard solutions with different contents of the carbonyl compound, reacting with 2,4-dinitrophenylhydrazine and potassium hydroxide under a certain condition, and observing that the color gradually changes from faint yellow to deep red brown with the gradual increase of the content of the carbonyl compound. According to information such as the colors of the standard solutions, volume part mass number of the content of the carbonyl compound, and methanol grade, a standard colorimetric card. A sample completely reacts under the same condition, compared with the standard colorimetric card, a closest color is found, and the information such as content of the carbonyl compound and the methanol sample grade is directly read. The quantitative calculation of the content of the carbonyl compound can be realized. The standard colorimetric method has the characteristics of intuition, rapidness, convenience, low requirements for detection devices, apparatuses and occasions, and the like.

The invention discloses an auxiliary loading device for simulating stress diffusion effects of a pavement layer and an application method. The auxiliary loading device comprises a load distribution system, a load transfer system and a viscoelastic contact simulation system, wherein the load transfer system comprises a plurality of load transfer devices; and the load transfer device comprises a connecting roof, a force transfer spring with a different stiffness coefficient, a hinged bottom plate, a connecting chute and a connecting sliding bar. The application method based on the above auxiliary device comprises steps: (1) the stiffness coefficient of each force transfer spring is determined; (2) the auxiliary device is assembled; and (3) fatigue loading is carried out. According to the auxiliary loading device for simulating the stress diffusion effects of the pavement layer and the method, the diffusion effects of the pavement layer on the fatigue load can be well simulated, a test condition is simplified, the fatigue test result obtained based on the auxiliary loading device can well consider the influences of pavement stress diffusion effects on the test result, and the obtainedtest result is made to be closer to the actual operation condition.

The invention discloses a preparation method of a furandicarboxylic acid diamine polymer, which comprises the following steps of dissolving and mixing diamine and furandicarboxylic acid, and reactingunder the protection of inert gas to generate a precipitate until the precipitate is not increased any more, thereby obtaining a composite salt, adding composite salt into a reactor, introducing inertgas, continuously vacuumizing, under the catalysis of a catalyst, firstly pre-polymerizing until the viscosity of the whole system is not increased any more, and then raising the temperature for polycondensation until the viscosity of the whole system is not increased any more, so as to obtain a furandicarboxylic acid diamine oligomer, and under the protection of inert gas, carrying out solid-phase polymerization on the obtained furandicarboxylic acid diamine oligomer to obtain the furandicarboxylic acid diamine polymer. According to the method, furandicarboxylic acid and diamine generate composite salt, a polymer is obtained through prepolymerization and condensation polymerization, and then the furandicarboxylic acid diamine polymer is obtained through solid-phase polymerization and purification. The test conditions are simple, no solvent is used, and no organic waste liquid is generated in the preparation process.

The invention provides a deep foundation pit detection method based on a white-light digital image frequency domain analysis method. The deep foundation pit detection method includes the following steps: step 1, utilizing digital image input equipment to respectively record deformation of a test piece or gray level comparison images before and after moving; step 2, uploading the gray level comparison images to an image processing system; step 3, digitalizing the uploaded gray level comparison images by the image processing system; step 4, taking random gray level distribution or feature stripe on the surface of the test piece as a carrier to extract displacement information from the digitalized gray level comparison images through the white-light digital image frequency domain analysis method. A testing system in the white-light digital image frequency domain analysis method is simple, no special treatment is needed for the testing surface generally, testing conditions are simple, a vibration isolating platform is not needed, and the deep foundation pit detection method can be used in any place, thereby being wide in application range.

The invention provides a thermal resistance detection method based on a body diode, belongs to the technical field of electronic device detection, and is used for detecting the thermal resistance value of insulated gate field effect transistors. The insulated gate field effect transistors are enabled to work by a circuit. The method comprises the steps that the plural insulated gate field effect transistors are arranged in parallel; reverse current is piped into each insulated gate field effect transistor so that the reverse current is enabled to flow through the parasitic diode of each insulated gate field effect transistor; and the thermal resistance value of each insulated gate field effect transistor is detected by using thermal resistance detection equipment, wherein the reverse current is current inputted from the source electrode of each insulated gate field effect transistor and outputted from the drain electrode of each insulated gate field effect transistor. The beneficial effects of the thermal resistance detection method based on the body diode are that the current is piped into the parasitic diodes of a power MOS to test heat of each parallel branch MOS transistor to detect the thermal resistance value of the power MOS transistors and the thermal resistance uniformity so that the detection sensitivity can be enhanced, operation is easier and the cost is lower.

The invention provides a renal artery sympathetic nerve activity measurement system. The system comprises blood analysis and measurement equipment, an interventional catheter, a flexible expansion part which is arranged at the position close to the other end part of the interventional catheter, is communicated with the interventional catheter and is used for controllably stimulating the renal artery sympathetic nerve activity through expansion at the renal artery so as to promote secretion to form related to-be-tested blood, and various blood detection sensors which are arranged on the interventional catheter, are close to the flexible expansion part and are used for collecting to-be-detected blood, converting the to-be-detected blood into various corresponding signals and feeding the various corresponding signals back to the blood analysis and measurement equipment, wherein various signals of the blood to be measured are analyzed through the blood analysis and measurement equipment to form corresponding physicochemical indexes reflecting renal artery sympathetic nerve activity. The technical scheme has the beneficial effects that the whole measurement system is high in controllability, simple in testing condition as long as the flexible expansion part is expanded to the wall of the renal arterial blood vessel. Furthermore, the activity of renal artery sympathetic nerves can be accurately determined based on specific physicochemical indexes.

The invention discloses a method for predicting generation time of instability type ruts on bituminous pavement, relates to a method for determining or analyzing materials by means of determination ofchemical or physical properties of materials, and belongs to the technical field of road engineering. Load effect frequency corresponding to a start point of a third phase of an asphalt mixture creeptest is an instability life, by means of an indoor simple performance test, a prediction model of indoor asphalt concrete test piece uniaxial and triaxial dynamic creep test instability life in a test temperature range is obtained, only a certain temperature and a stress state are provided, the indoor mixture test piece creep third phase start point can be directly predicated, and finally a finite element analytical method is used for obtaining a stress state of a real pavement model under a standard axle load effect and obtaining instability life of a real pavement by combining real ambienttemperature and traffic volume condition; a feasible scheme with simple test condition and operation convenience is provided for predicting real pavement rut instability life.

The invention relates to the technical field of sensors, in particular to a palladium plating multi-wall carbon nanotube smell sensor suitable for prawns. The palladium plating multi-wall carbon nanotube smell sensor suitable for the prawns comprises a sensor sensitive film layer, a first electrode and a second electrode, wherein the sensor sensitive film layer, the first electrode and the second electrode are distributed in sequence from top to bottom. The second electrode is made of an aluminum plate through anodic oxidation. The first electrode is made of precious metal on the surface of the second electrode through the direct current magnetron sputtering technology. The sensor sensitive film layer is formed in the mode that palladium plating is conducted on the surface of a multi-wall nanotube after acid treatment and the surface of the first electrode is coated with the sensor sensitive film layer. The smell sensor has the advantages of being high in sensitivity, short in responding time, low in testing temperature and simple in structure.

The invention relates to a method for rapidly determining the content of free acid in a lithium hexafluorophosphate electrolyte by a coulometric titration digital end-point method. According to the method, thermal decomposition of lithium hexafluorophosphate is inhibited by means of a low-temperature test environment, OH <-> generated by an electrolytic reaction and free acid in a sample to be tested are subjected to a neutralization reaction, a solution pH value collected by a pH indication system in real time is substituted into a mathematical model for repeated calculation, and then a reaction endpoint is judged, so that the aim of automatically controlling titration is fulfilled. The whole determination process can be completed within about 5 min, an obtained test result is good in accuracy, precision and repeatability; and the method has the advantages of being easy and convenient to operate, rapid, high in automation degree and the like; and the analysis and test method has good application prospects in industrial production.

The invention provides a test method of a helicopter air inlet channel anti-icing system. The helicopter air inlet channel anti-icing system comprises an air inlet channel and a heating assembly. The method comprises the steps that a normal temperature test is conducted on the helicopter air inlet channel anti-icing system, and when the temperature characteristic of an air inlet channel does not meet the anti-icing design requirement, iterative correction is conducted on the air inlet channel till the air inlet channel meets the anti-icing design requirement; an icing wind tunnel test is carried out on the helicopter air inlet channel anti-icing system, and when the heating performance of the heating assembly does not meet the design requirement, iterative correction is carried out on the heating assembly till the design requirement is met; and carrying out a spraying tower test on the helicopter air inlet channel anti-icing system, and verifying the anti-icing performance of the helicopter air inlet channel anti-icing system. Test items of different development stages are reasonably planned, the system performance can be fully verified, the repair workload after installation is reduced, and the development time and the test cost can be saved.

The invention discloses a standard colorimetric method for carbonyl compound content in industrial methanol, and belongs to the field of industrial methanol. The method comprises the following steps:preparing a series of standard solutions with different carbonyl compound contents, reacting the standard solutions with 2, 4dinitrophenylhydrazine and potassium hydroxide in sequence under certain conditions, and observing to find that the color is gradually changed from faint yellow to dark red brown along with the gradual increase of the carbonyl compound contents; preparing a standard colorimetric card according to the color of the standard solution, the volume part mass number of the carbonyl compound content, the methanol grade and other information; after the sample is completely reacted under the same condition, comparing the sample with a standard colorimetric card, finding out the closest color, and directly reading out information such as the content of the carbonyl compound andthe grade of a methanol sample. Quantitative calculation of the content of the carbonyl compound can be achieved. The determination method has the characteristics of intuition, rapidness, simplicity,convenience, low requirements on detection equipment, instruments, places and the like.

A method for testing the hardness of cord thread includes installing the cord thread onto special testier, applying 10-1000 N of tension to it at speed of 20-500 mm / min, and directly reading the maxinal draft force which is just the hardness of cord thread.

The invention relates to a high-precision accelerometer resolution test method. Based on a differential capacitive method, a mini capacitor is connected in series to one end of each accelerometer, output of the two accelerometers with similar scales is summed during test, a digital switch controls ON / OFF between the mini capacitor and an accelerometer loop, and the resolution is tested. The methodcan be used to overcome strict requirements for high-precision accelerometer resolution test via traditional equipment, and principally, the method can be used to measure the resolution <=1*10<-6>g precisely and effectively. The capacitance difference between the two ends of the accelerometer is changed directly to reach mini acceleration input, an experimental device can be simplified greatly, and influence of vibration of measuring equipment on a test result during traditional measurement can be neglected. Via the double-accelerometer summation method, common-mode noise influence can be reduced greatly, available acceleration signals are extracted, the resolution of high-precision accelerometers whose resolution is higher than 1*10<-6>g can be tested, and the method has significance inguidance.