42results about How to "Test data is stable" patented technology

The invention discloses a method for measuring polyvinyl alcohol content in the water. An excessive sulfuric acid is added under neutral heating condition (60-90 DEG C.) to remove starch having interference to the measurement by hydrolysis, and the excessive acid reacts with the polyvinyl alcohol in the sample to generate an ester in the mean time. In presence of boracic acid, the polyvinyl alcohol and the ester generated by reaction of the polyvinyl alcohol and the sulfuric acid can both react with a boracic acid - iodine - potassium iodide solution to produce a stable blue-green complex compound, and an absorbency is measured by a spectrophotometer at a point of a special wavelength of 645nm. A standard work curve is drawn according to the linear relation between the absorbency and the concentration of the reactor, thus the concentration of the sample can be known by checking the drawn standard curve after the sample measurement. The invention controls measurement error within the range of 5%, and the measurement result is stable and accurate, which makes the invention a feasible method for measuring polyvinyl alcohol concentration in the printing waste water.

The invention provides a method used detecting air purifying material purification efficiency. The method comprises following steps: a purifying material sample and a reference sample are prepared; an adsorbing material and the purifying material sample are delivered into a sealed container, a pollutant solution to be detected is delivered into a glass dish in the sealed container, the sealed container is sealed, and is unsealed after 12 to 48h of reaction, the adsorbing material is collected, and is subjected to desorption using a desorption solvent so as to obtain a desorption solution I; the reference sample is subjected to treatment same to that of the purifying material sample so as to obtain a desorption solution II; pollutant contents C1 and C0 of the desorption solution I and the desorption solution II are detected, and purification efficiency r of the purifying material is calculated based on a formula r=(C0-C1)/C0*100%. The method is simple; cost is low; the method is suitable for experimental application and industrial application, and is accurate and reliable; test results are stable; and reproducibility is high.

The invention discloses a fixture used for testing soft roll battery electrical performance. The fixture used for testing soft roll battery electrical performance comprises an insulating main board, a positive electrode connecting device and a negative electrode connecting device which are arranged on the insulating main board, the positive electrode connecting device is corresponding to a positive electrode ear of the soft roll battery, and the negative electrode connecting device is corresponding to a negative electrode ear of the soft roll battery. The positive electrode connecting device and the negative electrode connecting device both comprises a gasket connected with the insulating main board and an electric conduction tabletting arranged on the upper layer of the gasket in a folding mode. The electric conduction tabletting and the gasket are connected through two bolts arranged on a position closes to two ends of the electric conduction tabletting and the gasket, and at least two electrode pillars are arranged on the upper surface of the electric conduction tabletting, and at least one electrode pillar is provided with an external threads, and nuts matched with the external thread can tightly compress a current test terminal of the testing device between the nuts and the electric conduction tabletting. With adoption of the arrangement, the fixture used for testing soft roll battery electrical performance can effectively simplify test process of the soft roll battery and provide stable test data.

The invention provides a constructing method for domestic wireless product anti-interference testing environment, and belongs to the technical field of the wireless product anti-interference ability test. The method comprises the following steps: constructing a shielding house, wherein a plurality of rooms are constructed in the shielding house according to the through-wall demand, and one of the rooms is the room to be tested; setting an interference source: setting a first dynamic interference source, a second dynamic interference source and a static interference source; placing the first dynamic interference source, the second dynamic interference source and the static interference source in the room of the shielding house according to the environment requirements; and regulating the interference intensity according to the test environment requirements. The constructing method for the domestic wireless product anti-interference testing environment has the beneficial effects of stable interference source, more stable and accurate test data, and easy maintenance. Under the abnormal situation of the product, the problems can be quickly investigated and positioned. The test environment and method are close to the application scenes of a user, and the performance of the wireless product is better and more stable under the user using environment.

The invention discloses a novel yarn hairiness testing device which comprises a tester body and a fixed bracket; a display screen is arranged on the lower end of the tester body; a control switch is arranged on one side of the display screen; a yarn is fixedly arranged on the fixed bracket; a plurality of guide wheels are fixedly arranged on the upper end of the tester body; a detector is arranged on one side of each guide wheel; a rotating disc is arranged on the output end of each detector; the yarn passes through the detectors through the guide wheels; and the end of the yarn is fixedly connected with the rotating discs. According to the novel yarn hairiness testing device, a design integrating light, mechanics and electronics is adopted, the precision in setting the hairiness length is high, the yarn runs stably, a computer automatically carry out detecting, correcting, displaying and calculating operations, the hairiness test data is stable, and the error is small.

The invention belongs to the technical field of catalyst application, and relates to physical performance evaluation of a catalyst, in particular to a strength property evaluating device suitable for a solid granular catalyst. The strength property evaluating device comprises a catalyst fluidization testing system and a catalyst dust recycling system communicated with the catalyst fluidization testing system. The catalyst fluidization testing system comprises a gas inlet pipe and a gas-solid separator, the gas inlet pipe is connected with the gas-solid separator through a fluidization tester, a catalyst wearing device is arranged in the fluidization tester, and the gas-solid separator is connected with the catalyst dust recycling system. The strength property evaluating device is simple in structure, convenient to demount and maintain and flexible to operate, a gas distribution palate, the gas inlet pipe and an outer heating furnace are utilized for simulating the real use environment of the catalyst together, the strength property of the catalyst is reflected through the final amount of dust recycled by the catalyst dust recycling system, adaptability to the catalyst is high, and test data is stable and reliable.

The invention belongs to the field of mechanical structure design and relates to a quick connection mechanism used for SMP adapter detection. It consists of a rectangular mounting base plate [1], a first V-shaped iron [7] and a second V-shaped iron [7a] installed at both ends of the base plate [1], a fixed SMA/SMP adapter [9] and its mounting seat [ 2] and active SMA/SMP adapter [10] and its installation mechanism. The invention adopts the lever power-assisted method, which reduces the operating force when the SMP adapter is plugged in and out, and ensures the accuracy and precision of the SMP adapter docking through the sliding rail limit method, achieves fast and convenient connection, and improves the connection efficiency and precision, ensuring the connection quality and reducing labor intensity.

The invention relates to a dynamic testing method for elevator's horizontally sliding door closing force, which belongs to the dynamic testing technology of dynamo-electric equipment's door closing force. The method tests the data concerning dynamic door closing force and dynamic door closing speed in a door closing process. Through conversion, the door closing resistance force is obtained when the door closing speed reaches a standardized threshold value; the resistance force is compared with the standardized maximum resistance force of 150N; and when resistance force is beyond the 150N, the door closing force is considered not qualified; and when the resistance force is smaller or equal to the 150N, the door closing force is considered qualified. In the method, each point of the door closing trajectory in the test is considered and the maximum force is detected from these points.

The invention discloses a dynamic testing method for elevator door closing kinetic energy. The dynamic testing method is characterized in that the pressure and speed during the door closing process are dynamically tested and the door closing kinetic energy is calculated. According to the dynamic testing method, through distinguishing and calculating the relationship of speed, pressure, displacement and time during the door closing process, a door closing kinetic energy test value during the elevator door closing process is acquired.

The invention provides an interface detection method based on an optical interface detector; a closed-loop temperature control method is adopted, a constant-temperature environment is provided for a light-emitting device, the output light intensity of the light-emitting device is constant, the intensity of reflected light in different media is also constant, and thus when a system operates for a long time, the stability of a reflected light signal is good, and a good guarantee is provided for system interface detection; an automatic gain adjustment algorithm is adopted, the effect of an automatic amplification function of small signals is obvious during long-distance testing, and for signals with small difference, the output percentage of the signals with the small difference is increased by utilizing an output signal amplification principle, so that the signals with the small difference can also be obviously distinguished; and when the optical fiber length is 10 m and 2 km respectively, five media including water, 95# gasoline, 92# gasoline, 98# gasoline and 0# diesel oil can be accurately distinguished, the difference value between the 92# gasoline and the 98# gasoline reaches 20%, the test consistency is good, and the test data is stable.

The invention provides a method for measuring the diffusion performance of an acid dye in a color paste, comprising preparing a primary paste and placing the primary paste into a transparent cylindrical container; adding a dye to the primary paste formulate a color paste, and flatly and uniformly paving a layer of the color paste on an upper surface of the primary paste; performing constant-temperature treatment at 60-95° C. on the cylindrical container, so that the dye in the color paste on the top of the blank primary paste in the cylindrical container diffuses downwards to the bottom of the cylinder; and sampling the primary paste from a sampling hole, and diluting the sampled primary paste with deionized water. The method of the invention has simple operation steps, reliable and safe experiments, highly stable test data and good reproducibility of results, and high temperature and high pressure are not required herein.

The invention relates to a detection method for the viscosity of continuous-casting casting slag, mainly aiming at solving the technical problem that the viscosity of existing continuous-casting casting slag cannot be accurately measured. The method provided by the invention comprises the following steps: 1) filling 140g to 160g of carbon-removed continuous-casting casting slag into a graphite crucible; putting a graphite sleeve and the graphite crucible into a furnace slag viscometer; raising temperature to 1300 DEG C to 1340 DEG C and keeping the heat for 20min to 30min; 2) enabling a high-purity metal molybdenum measuring head with the size of phi14*22mm to fall off from the upper part of the furnace slag viscometer, and staying for 3min to 4min when the molybdenum measuring head falls to the upper side of dreg liquid; inserting the molybdenum measuring head into molten slag, wherein the distance between the end part of the molybdenum measuring head to the bottom of the crucible is more than or equal to 15mm; starting to measure a zero point; 3) rotating the molybdenum measuring head and starting to detect and recording the viscosity of the casting slag; 4) taking an average value of data, which is continuously detected and recorded under the same temperature of the same casting slag test sample and is no less than 10, as the viscosity of the casting slag under specified temperature. By adopting the detection method, accurate determination of the viscosity of the continuous-casting casting slag is realized.