102results about How to "Fast test method" patented technology

The invention provides a method for testing and evaluating sound absorbing and insulating performance of an automotive acoustic package. The sound absorbing and insulating performance of the automotive acoustic package is evaluated through a tested P / Q value, thereby realizing a result with higher reliability and realness, reducing a testing evaluation result error caused by an effect of number ofmicrophones or other conditions, realizing high reliability and high comprehensiveness of the result, and integrally reflecting the NVHN performance of the whole automobile. Furthermore the method isthe comprehensive, direct, quick and effective testing method which comprises common noise sources of the automobile. The method according to the invention realizes a simple testing method and has high versatility. Furthermore the method can be adapted with evaluation for noise absorbing and isolating performance of various automotive acoustic packages, and furthermore realizes low test cost.

The invention relates to a road test structure and method of automobile skylight wind vibration noises. The test structure comprises a wind speed signal acquisition unit and an automobile speed signal acquisition unit. The test structure is characterized in that the output ends of the wind speed signal acquisition unit and the automobile speed signal acquisition unit are respectively connected with the input end of a real speed generating unit; and the output end of the real speed generating unit is divided into two paths, wherein one path is connected with the input end of a signal processing unit through the real speed generating unit, and the other path sequentially passes through an in-automobile cavity, a noise generating unit and a noise acquisition unit, and then is connected to the input end of the signal processing unit. With the test structure adopted, the objective data of the automobile skylight wind vibration noises can be obtained in an actual road in most direct manner, and the test data can be analyzed through acoustic software, and a frequency characteristic which with changes speed and assist in generating maximum wind vibration noises is calculated; and the reading of an anemometer in a uniform working condition is determined as real speed corresponding to wind vibration noise generation and is adopted as objective evaluation. The method has the advantages of simple operation, low cost, strong applicability and the like.

The invention discloses a method for testing CVT (continuously variable transmission) slope-starting performance, comprising: step (a) tests on slope-starting capability respectively comprise: firstly testing starting performance respectively at D gear and R gear on flat road; then testing starting at slope with various gradients; testing forward starting performance and backward starting performance after halting the vehicle; test on slope practicality comprises: test for maximal halting gradient, idle vibration test for slope halting at D gear, test for impact and collision noise occurring during forward starting and backward starting at slope with various gradients; test on outdoor running; test to judge whether the speed ratio transformation works smoothly, whether the gear shifting position malfunction or disengagement occurs, whether the oil leakage occurs on air plug and whether the oil pump pressure reduces when normally running on outdoor long range slope; step (b) comparing recorded data with designed theoretical value of CVT in order to judge whether it meets the requirement. The invention has advantages of simple, rapid, compact, reasonable and convenient.

The present invention belongs to immunological parasitic disease diagnosis technology. The reagent kit is prepared via dye labeling process and includes labeling antigen solution compounded with 2BLN disperse blue dye, soluble schistosoma japoncium egg antigen, 1% sodium azide and bow serum albumen blocking liquid; and test paper strip with nitrocellulose as chromatographic film detection lines of human sheep antigen IgG and contrast lines of soluble schistosoma japonium egg resisting rabbit antigen IgG on the chromatographic film. The serum to be tested is mixed with the labeling antigen solution and the mixture liquid is tested with the test paper strip.

The invention relates to a rapid measurement apparatus for the total amount of moisture and evaporation loss of petroleum heavy oil components, and a method thereof. According to the apparatus, an evaporation container is arranged on an electric heating furnace; the upper part of a thermometer and a stirring device transimisson head are connected with a column; the lower part of the thermometer and the stirring rod are placed in the evaporation container. According to the method, the weight of a sample before the evaporation is measured, and the measurement apparatus is assembled; the electric heating furnace is opened to heat the evaporation container to a temperature of 150 DEG C; the heating treatment is continuously performed until the thermometer shows the temperature of 175-185 DEG C, a stirring treatment is performed for the sample for 30-60 minutes at the temperature, then the weight of the sample after the evaporation is measured; the total amount of the moisture and the evaporation loss of the petroleum heavy oil components is the difference / the weight of the sample before the evaporation, wherein the difference is the difference of the weight of the sample before the evaporation and the weight of the sample after the evaporation. According to the present invention, the apparatus of the present invention has characteristics of convenient operation, low cost and reliable measurement result, and the reliable measurement result meets the requirements of the measurement result of the total amount of the moisture and the evaporation loss of the petroleum heavy oil components; specialized equipment and professional technicians are not required; the operation is convenient and practical; the time is saved; the labor efficiency is improved.

The invention provides an automobile rolling noise test system and noise test method, and belongs to the field of mechanical vibration and noise measurement. Radiation noise of tires, rolling noise of channels between the tires and a cab and vibration data of the automobile tires are tested in an anechoic chamber under two situations; and if the radiation noise data and the vibration magnitude detected in two times of testing are within a set fluctuation range, rolling noise acquired by two times of measurement is compared, and the difference value of two times of rolling noise is calculated to be the contribution value of all components or partial components of a chassis system to rolling noise. With application of the method, degree of contribution of vibration of the whole or partial components of the chassis system to vibration noise in the automobile can be achieved, separation of structural transfer and air transfer of rolling noise can be realized, and the test method is a comprehensive, direct, rapid and effective test method including common conditions of the automobile. The test system applied by the method is simple in structure and has high universality, and only the position of a chassis body separation device requires to be adjusted according to different automobile models so that cost is low.

The invention discloses a determination method for the activity of carboxymethyl cellulose. Acidic or neutral cellulose enzyme solution to be tested is firstly prepared: liquid enzyme is diluted by acidic or neutral buffer solution; the enzyme solution to be tested is added in a reaction tube, is added into sodium carboxymethylcellulose solution substrate with equivalent volume, DNS (3, 5-dinitrosalicylic acid) reagent with three times volume being enzymatic blank control, and is mixed evenly and reacts under the temperature of 50 DEG C; next all the reaction tubes are taken out, the DNS (3, 5- dinitrosalicylic acid) reagent with three times volume is added into the sample tube, sodium carboxymethylcellulose solution substrate with equivalent volume is added in a control tube; then all the reaction tubes are heated by water bath for 5 minutes and taken out to be cooled to the room temperature, and the reaction is ceased; finally, the reacted solution is taken to carry out the colorimetric determination of the absorbance value under the wavelength of 540nm, and the reducing sugar content is calculated according to the glucose standard curve. Compared with the prior art, the determination method has small variation coefficient of many tests for a same sample, good reproducibility of test results and fast test speed, and is suitable for determining numerous samples simultaneously.

The invention relates to a method to test the constitution of hydrogenation tail oil paraffin group by near infrared optical spectrum. It builds up models of paraffin, alkane, and isoalkane by alkene cracking device, and aromatics reformer and oil refining hydrogenation unit. And the content of paraffin, alkane, and isoalkane would be calculated by using the models. It has the advantages of convenient, rapid and accurate.

The invention discloses a cement concrete anti-thaumasite form of sulfate attack (TSA) erosion acceleration test device. The device comprises a low-temperature box, a pulse generator, an electrode plate and at least one corrosion pool, wherein a corrosion groove for mounting a concrete test sample is formed in each corrosion pool; a riffle groove for permeating sulfate solution into the corrosiongroove is formed out of the corrosion groove; the electrode plate comprises a positive electrode plate, a negative electrode plate and small holes for seepage; the small holes for seepage are formed in the positive electrode plate and the negative electrode plate; the positive electrode plate and the negative electrode plate are connected with the pulse generator respectively; the corrosion pool is placed into the low-temperature box; and the interface of the corrosion groove and the walls of the riffle groove at the two ends is a comb-like plate. The invention also provides a cement concreteanti-TSA erosion acceleration test method. The pulse generator applies electroosmosis pulse to the two ends of the concrete, so the speed of corrosion caused by that the sulfate solution is permeatedinto the concrete at low temperature is accelerated and the test time is reduced. The test device is simple and easy to operate and has low cost. The test method is simple, reliable and rapid.

The invention provides a characterization method for biogas residue aerobic composting fermentation maturity. The method includes: subjecting a to-be-detected sample of biogas residue aerobic composting to detection by microscopic infrared transmission spectrum, extracting single wavenumber second derivative spectral images with a wavenumber of 2850+ / -30cm<-1> and a wavenumber of 1568+ / -30cm<-1> and radial second derivative spectral data thereof; according to the variation trend of the second derivative spectral data under a wavenumber of 2850+ / -30cm<-1> and a wavenumber of 1568+ / -30cm<-1> from the outside to the inside along the radial direction, acquiring an intersection point, i.e. the aerobic layer thickness; and then characterizing the biogas residue aerobic composting fermentation degree according to the aerobic layer thickness change. The method provided by the invention selects specific wavenumber for detection of the biogas residue aerobic composting aerobic layer thickness, so that the detection method for characterization of maturity is accurate, also the detection method has the characteristics of rapidity, convenience and small environmental pollution, thus having very good application prospect.

A method for detecting concentration of oiling agent in production of polyacry / onitrile raw filament being used to prepare carbon fiber includes obtaining concentration and refractive power of oiling agent, optimizing linear equation, sampling, measuring refractive power and converting measured refractive power to be concentration.

The invention belongs to the field of braking performance of escalators or moving sidewalks and particularly relates to a method of determining stopping distance of an escalator or moving sidewalk. According to the method, no-load stopping distance and light-load stopping distance are measured by two running tests in no-load and light-load states, and the stopping distance of the escalator or moving sidewalk under the load smaller than or equal to rated load can be obtained through a mathematical model. The method is convenient, fast and safe; test results are accurate and reliable. Testing by a heavy-load test is not required, testing efficiency is greatly improved, damage of a lower device of the escalator or moving sidewalk, caused by braking performance not meeting the requirements when the load test method is used is avoided, and testing is less risky. The method has few measurement steps, workload is low, measurement efficiency is high, safety is high and determination results are accurate.

The invention discloses a rapid detection method for detecting the activity of inorganic polymer cement used metakaolin. The method comprises the steps of metakaolin preparation by hydrochloric acid dissolution and calcinations, complex reaction and titration; the hydrochloric acid is the standard hydrochloric acid with the mass percentage concentration of 20%, the dissolution is carried out for 2 hours at 80 DEG C; 2-3 ml of nitroso salt indicator is added to the solution obtained after the complex reaction, 0.035 mol / L of bluestone standard volumetric solution is used for titration with the end point that the yellow indicator is changed from emerald to grass green, and the activity of the metakaolin obtained through calcinations is evaluated through calculating the dissolution rate of alumina. The detection shows that a positive correlation exists between the intensity of a hardenite and the diction method when the same metakaolin is used with a sodium silicate solution for preparing inorganic polymer cement, The method for detecting the metakaolin has the characteristics of convenience, rapidness, exactness, low cost and so on, and only three hours is required for detecting a sample.

The invention relates to a method for the on-line detection of coagulation bath concentration in the production of polyacrylonitrile strands for carbon fibers, which comprises the following steps: 1) preparing a dimethyl sulfoxide standard solution; 2) manufacturing a standard curve equation; 3) connecting devices; 4) carrying out on-line detection; and 5) calculating the concentration. The invention solves the technical problems that the existing coagulation bath concentration detecting method is time-consuming, the detection result is inaccurate and the on-line detection can not be realized. Besides, the invention is beneficial to improving the timeliness, the dynamic nature and the accuracy of the concentration control of dimethyl sulfoxide in the coagulation bath. The detecting method is fast, accurate and visual, and is suitable for automatic production.

The invention discloses a test method for simulating oxidation and decarbonization of steel, and belongs to the technical field of steel and iron material surface quality inspection. The test method comprises the steps that a sample for simulating the oxidation and decarbonization is prepared by linear cutting; the sample is subjected to grinding, polishing, and ultrasonic cleaning treatment, and then placed into a dynamic thermogravimetric analyzer comprising a plurality of gas circuits; steel sample heating, heat preservation and cooling are achieved; thermogravimetric curves of different holding times, different heating temperatures and different gas atmospheres and the sample for simulating the oxidation and decarbonization are obtained; the depth of decarburization of the steel is determined and analyzed according to GB / T 224-2008 Determination of Depth of Decarburization of Steels by metallography; and surface decarburization of the steel is obtained. The test method has the advantages that the test method is simple, quick and effective, and enriches steel oxidation and decarbonization research methods.

The invention relates to a method to test the constitution of hydrogenation tail oil naphthenic hydrocarbon group and arene group by near infrared optical spectrum. It builds up models of naphthenic hydrocarbon, 1-naphthenic hydrocarbon, 2- naphthenic hydrocarbon, 3- naphthenic hydrocarbon, 4- naphthenic hydrocarbon and arene by alkene cracking device, and aromatics reformer and oil refining hydrogenation unit. And the content of naphthenic hydrocarbon, 1-naphthenic hydrocarbon, 2- naphthenic hydrocarbon, 3- naphthenic hydrocarbon, 4- naphthenic hydrocarbon and arene would be calculated by using the models. It has the advantages of convenient, rapid and accurate.

The invention relates to a detection method for quickly evaluating weatherability of a coating. The method is characterized by comprising the following specific steps: preparing a test sample, testing and analyzing UV (Ultraviolet) transmittance, testing and analyzing secondary UV transmittance, calculating to obtain the change rate of the secondary UV transmittance after 3-month natural exposure testing or 500-hour artificially accelerated aging testing of the tested coating, and analyzing the advantages and disadvantages of the weatherability of the coating. By using the detection of the UV transmittance of the coating, whether the intrinsic property of the coating changes can be quickly judged through the change condition of the UV transmittance of the coating after 3-month natural exposure testing or 500-hour artificially accelerated aging testing, and further the weatherability of the coating is quickly evaluated through test data after detection of a standard instrument. The detection method has the characteristics of quickness, good reproducibility, accurate relation, low testing cost and the like; meanwhile, the relevance of outdoor natural exposure testing and artificially accelerated aging testing can be established.

The invention relates to a method for determining wax contents in asphalt, and belongs to the field of road engineering asphalt quality detection. The method comprises the steps of: preparing a sample, collecting an infrared spectrum of the sample by using an infrared spectrometer, and obtaining an average spectrum figure through an ATR manner; selecting an appropriate spectral segment as a modeling interval, carrying out baseline correction processing and peak processing on the spectrum by utilizing relevant software, and carrying out regression or fitting analysis on data of the modeling interval by using a mathematic method so as to establish a regression model; and predicting wax content in the unknown sample by utilizing the model. The method is low in error rate and is capable of carrying out real-time, in-situ, non-destructive, rapid and quantitative analysis on asphalt wax contents.

The invention provides a method for testing calcium and magnesium content in a limestone-gypsum wet desulphurization absorbent. The method comprises the following steps: (1) taking a sample and drying; (2) slowly adding an acid; (3) heating and boiling; (4) cooling and obtaining a constant volume; (5) determining calcium and magnesium; and (6) processing data, wherein the step (5) comprises a step (5.1) of determining the calcium content and a step (5.2) of determining the total content of the calcium and the magnesium. According to the method, a hydrochloric acid solution is used for dissolving limestone to realize the aim of accurately representing active components of the absorbent of an FGD (Flue Gas Desulfurization) system. The method has the advantages that (1) a testing method for representing active components of the absorbent of the FGD system is simple, rapid and accurate; manpower, material resources and financial resources are saved; operation is facilitated; (2) the method is used for testing the calcium and magnesium content in the limestone-gypsum wet desulphurization absorbent of a thermal power plant so as to really reflect the condition of the active components of the absorbent needed by the FGD system of the thermal power plant.

The invention provides a VDMOS component low-temperature long-distance on-line test method which includes the following steps that hardware equipment is connected for debugging to guarantee that a whole experiment system operates well; a computer is controlled to operate a test program and a control instruction is output to a test development board; the instruction is received by the test development board, and a single chip microcomputer switches on a switch according to the instruction; according to the switched-on switch, a corresponding component on the development board of a to-be-tested component is selected; the selected component is tested through test equipment, and test data are fed back to the control computer; the control computer receives the test data of the test equipment and displays and stores the test data. The invention further provides a VDMOS component low-temperature long-distance on-line test system. The defects that according to a common experiment, the number of tests is small and consumed time is long are overcome, meanwhile, influences of water vapor on the surface of the tested component on an instrument are avoided, and the test method is easy and quick to achieve.

The invention belongs to the technical field of titanium dioxide performance testing, and discloses a method for rapidly testing weather resistance of titanium dioxide and application. The method comprises the following steps of (1) uniformly mixing materials for preparing a test sample wafer, wherein the material formula comprises the following components in parts by weight: 100 parts of polyvinyl chloride resins, 5-10 parts of titanium dioxide, 3-10 parts of lead salt stabilizers, 2-8 parts of chlorinated polyethylene, 1-3 parts of plasticizers, 3-20 parts of calcium carbonate, 1-3 parts of ACR-401 and 0.1-1 part of paraffin; (2) processing a mixture obtained in the step (1) into a sample wafer by adopting an extruder; (3) cutting the mixture obtained in the step (2) into a test sample wafer, and testing color values L0, a0 and b0; (4) sealing the test sample wafer in water, isolating air and carrying out sun exposure for 2-48 hours, and testing color values L1, a1 and b1; and (5) computing a color difference before and after the sun exposure, and judging the weather resistance of the titanium dioxide. According to the method, the weather resistance of the titanium dioxide can be rapidly, efficiently and accurately detected.

The invention discloses a method for judging pearl attributes of brackish seawater based on a quantitative relation of trace elements strontium and calcium. According to the method, an energy dispersion X-ray fluorescence spectrometer is used for carrying out element content detection and collection on different positions of the surface of the pearl, and tracing judgment of the fresh seawater culture environment of the pearl is carried out on the basis of the content of trace elements strontium and manganese in the pearl and the ratio relation of Sr to Mn. The identification equipment is widein application degree, the identification method is nondestructive, rapid and universal, the qualitative judgment method is simple, and a reliable judgment basis can be provided for tracing judgment and identification of the fresh seawater culture environment related to pearls in daily detection.

This invention belongs to measurement technique and relates to one carbon fiber polyacryl-nitrile protofilament process oil agent concentration online test method, which is characterized by the following: it uses series oil agent work pool to feed materials tube or to exit pipe online reflection index meter for online test and comprises the steps as: getting oil agent concentration and reflection index or sugar degree standard curve; optimizing line equation; online testing.

The invention provides a testing device for working pressure inspection of a thin hydraulic rubber capsule and a test method thereof. The test device for working pressure inspection of the thin hydraulic rubber capsule includes a pressure bearing box, a top cover clamping plate, a base clamping plate and an auxiliary device. The pressure bearing box is placed in a center position between the top cover clamping plate and the base clamping plate through the auxiliary device, and is fastened and pressed by bolt fasteners passing through the corresponding bolt holes of the upper and lower clampingplates. The top cover clamping plate is provided with a pressure test hole and a pressure-filling hole, the pressure test hole is connected with the pressure meter, and the pressure-filling hole is externally connected with a hydraulic pump. The invention can carry out a pressure-filling test on the thin hydraulic rubber capsule, so as to test whether the capsule can reach a designed working pressure and keep the working state stable; and meanwhile, the invention can measure the maximum working pressure of the capsule, and check the tightness of the contact joints of each component.

The invention discloses a system and a method for judging the initial tension and voltage stabilization time of a prestressed steel strand. The method comprises the following steps of: drawing a curveof the initial tension load and the voltage stabilization time changing along with the length of the steel strand through a test for testing the change of the initial tension load and the voltage stabilization time under different lengths of the steel strand; and analyzing the influence rule of the length of the steel strand on the initial tension load and the voltage stabilization time, and performing data fitting regression on the test curve to obtain a mathematical regression model of the length of the steel strand-the initial tension load and the length of the steel strand-the voltage stabilization time respectively. By means of the model, the initial tension load and the voltage stabilization time of the steel strand can be accurately judged according to the length of the tensioned steel strand, the tension quality of the prestressed steel strand is improved, the practicability is high, and the engineering quality of an actual bridge is improved.

The invention discloses a test method for evaluating decontamination effect of a detergent. The test method comprises the following steps of 1) contaminating the surface of the fabric with contaminants to produce a contaminated fabric contaminated with stains; 2) preparing washing devices including a fixing member, a stirrer and a washing container; 3) adding water and the detergent to be tested to the washing container of the washing device for stirring and mixing to obtain a detergent solution; and 4) fixing the contaminated fabric in the washing container by the fixing member of the washingdevices such that the detergent solution immerses the contaminated fabric, carrying out stirring and washing, and observing the stain change of the contaminated fabric to evaluate the decontaminationeffect of the detergent. The test method provided by the invention has the advantages of being intuitive, quick, simple to operate, easy to display and the like. By applying the test method providedby the invention, the decontamination ability of the detergent can be evaluated, the decontamination effect of the detergent can be demonstrated, and the effect of the detergent claiming to contain protease and amylase can be preliminarily evaluated.

The invention provides a testing method of in vitro relative efficiency of inactivated hepatitis A vaccine. The traditional mouse in vivo relative efficiency testing method is thoroughly replaced, the negative factors of more influential factors, poor repeatability and 30 days of testing period which are caused by using animals are solved, the testing can be accomplished in only 3.5 hours, the vaccine storage is reduced, the effective period of the vaccine is indirectly prolonged, the labor intensity is reduced, 1,5 million to 2 million vaccines can be additionally produced when vaccine is insufficient particularly, and 45 million to 60 million production value can be output. In addition, the method adopts the double-parallel line biological assay principle, provides a testing method of invitro relative efficiency of inactivated hepatitis A vaccine, and ensures that good linear regression is presented between HAV viral content and the logarithm corresponding to A value, and R<2> is over 0.97; and the testing result demonstrates good stability and repeatability, therefore, the testing method is convenient, quick and reliable.

The invention relates to an evaluation method for a corrosion inhibitor used in an alcohol ether alternative fuel system. The method comprises the following steps: (1) placing a metal sample into a formic acid water solution which does not contain a corrosion inhibitor to be tested and a formic acid water solution which contains the corrosion inhibitor to be tested separately, using the metal sample as a working electrode to form a three-electrode electrochemical testing system, and performing steady state cathode and anode polarization curve testing through semi-logarithmic coordinates after a natural corrosion potential shown in the description is stabilized; (2) extrapolating a Tafel linear region of a cathode polarization curve to be intersected with a horizontal line of the stabilized natural corrosion potential shown in the description, and obtaining a natural corrosion current icorr. from the intersection point; (3) calculating a corrosion inhibition efficiency of the metal sample placed in the formic acid water solution which contains the corrosion inhibitor to be tested through the natural corrosion current icorr., so as to obtain the corrosion inhibition effect of the corrosion inhibitor to be tested. Compared with the prior art, the evaluation method has the advantages of being stable in data, fast, small in error and the like, and can realize rapid evaluation and screening of the corrosion inhibitor used in the alcohol ether alternative fuel system.

The invention discloses a method for screening a 6-tube balanced terahertz frequency tripler based on DC detection, and relates to the technical field of frequency multipliers. The method comprises the following steps: adjusting the test gear of a multimeter to a diode test gear, firstly connecting a red probe of the multimeter with the core of an SMA head, connecting a black probe of the multimeter with a cavity shell of the frequency multiplier, wherein the multimeter displays a starting voltage of one diode string at this time; then, connecting the black probe of the multimeter with the core of the SMA head, and connecting the red probe of the multimeter with the cavity shell of the frequency multiplier, wherein the multimeter displays the starting voltage of another diode string at this time; and judging whether the performance of the 6-tube balanced terahertz frequency tripler is qualified according to the numerical value sizes of the two tested starting voltages. The method is simple in process and can be used for quickly screening out the unqualified terahertz frequency tripler.