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

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 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 the technical field of airplane part strength dynamic airworthiness testing, and especially relates to an aviation replaceable cushion dynamic airworthiness testing device and testing method. The testing device comprises an impact testing bench used for applying a preset impact load to a tested device so as to carry out a preset impact test; a rigid seat, wherein a replaceable cushion is fixedly arranged on the rigid seat; a testing clamp used for fixedly installing the rigid seat to the impact testing bench according to a preset installation mode; a dummy fixed on the replaceable cushion; a load sensor arranged in the dummy; and a light measuring device used for monitoring the motion attitude and the deformation of the tested device arranged on the impact testing bench in the testing process. According to the invention, the rigid seat is utilized to simulate a practical elastic seat, the testing condition is simplified, the testing cost of aviation seat cushions is greatly lowered, and the cost for purchasing the cushions is lowered for an aviation company.

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 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 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 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.

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.