2199results about "Weighing by removing component" patented technology

The invention belongs to the technical field of transformer ageing detection. An experimental device for transformer oilpaper insulating thermal ageing consists of an outer cavity, an inner cavity and a measurement-display system, wherein the inner cavity consist of a main cavity body, an oil conservator on the main cavity body, an electrode-sample test frame inside the main cavity body and a minor cavity body; the minor cavity body and the main cavity body are connected through a pipeline; a valve is arranged on the pipeline; and an air exhaust port and an oil injection port are arranged on the main cavity body. An experimental method for transformer oilpaper insulating thermal ageing comprises the following steps: 1) performing insulating-paperboard vacuum dry sample treatment; 2) placing sample and injecting oil; 3) installing the minor cavity body; 4) injecting transformer oil; 5) accelerating thermal ageing experiment; 6) measuring dielectric parameters on line to acquire related experiment data; and 7) analyzing off-line sample physicochemical parameters to acquire experiment data. The invention can measure the dielectric parameters of the samples on line in real time, regularly samples on the premise of not changing the prior test environment of the samples, and can research thermal ageing laws of oilpaper insulating materials of large-scale power transformers.

The invention discloses automatic test equipment for the volatiles of bituminous coal. The automatic test equipment comprises a bituminous coal heating module and a bituminous coal weighing module, wherein the bituminous coal heating module has the function of automatically opening/closing a furnace door, and the bituminous coal weighing module is capable of automatically weighing the masses of each crucible containing bituminous coal before and after an experiment; experimenters only need to place the crucibles on a crucible tray and do not need to participate in the later experiment process. The invention discloses automatic test equipment which is simple and compact in structure, convenient to operate, capable of automatically weighing the masses of each crucible before and after the experiment, and capable of carrying out a volatile experiment on 20 crucibles simultaneously.

A piezoelectric cantilever with a non-piezoelectric, or piezoelectric tip useful as mass and viscosity sensors. The change in the cantilever mass can be accurately quantified by monitoring a resonance frequency shift of the cantilever. For bio-detection, antibodies or other specific receptors of target antigens may be immobilized on the cantilever surface, preferably on the non-piezoelectric tip. For chemical detection, high surface-area selective absorbent materials are coated on the cantilever tip. Binding of the target antigens or analytes to the cantilever surface increases the cantilever mass. Detection of target antigens or analytes is achieved by monitoring the cantilever's resonance frequency and determining the resonance frequency shift that is due to the mass of the adsorbed target antigens on the cantilever surface. The use of a piezoelectric unimorph cantilever allows both electrical actuation and electrical sensing. Incorporating a non-piezoelectric tip (14) enhances the sensitivity of the sensor. In addition, the piezoelectric cantilever can withstand damping in highly viscous liquids and can be used as a viscosity sensor in wide viscosity range.

The invention relates to a judging method of the solid insulating and aging degrees of a transformer, which sequentially comprises the following steps of: 1. preparing a gradient concentration standard solution of a furfural solution, carrying out liquid chromatographic detection, and making a standard curve I; 2. taking insulating paper samples in an actual electric network transformer, carrying out the liquid chromatographic detection, and obtaining the furfural concentration in each sample according to the standard curve I; 3. respectively measuring the water content H thereof by adopting the insulating paper samples in the step 2, computing the dry paper concentration C, additionally sampling, measuring the specific viscosity thereof, and computing the polymerization degree of the insulating paper samples according to a Martin empirical formula; 4. making a standard curve II by using the polymerization degree of insulating paper as an abscissa and using the logarithm of the furfural concentration as an ordinate; and 5. measuring the furfural concentration for an unknown sample, obtaining the polymerization degree of the insulating paper according to the standard curve II in the step 4, and judging the solid insulating and aging degrees of the transformer according to an IEC60450 standard. The method only needs to extract proper oil samples, has simple operation, does not need power failure, and is a quite practical method.

The invention discloses equipment capable of automatically testing moisture of bituminous coal. The equipment comprises two main brackets, a bottom plate, a lower fiber plate, a hearth, an upper fiber plate, a turn plate, a rotating shaft, a secondary bracket, an elevating rack, a U-shaped rack, a motor rack, a rotating motor, two bearing brackets, a ball screw, a balance, a weighing lever, a guide block and a slide block, wherein the lower fiber plate is assembled on the bottom plate; the weighing lever is assembled on the balance. The equipment capable of automatically testing moisture of bituminous coal is high in automatic degree, high in work efficiency and convenient to operate.

The invention discloses a controllable fast-heating up thermobalance reacting furnace, comprising a high temperature furnace reaction unit, a balance weighting device, an air control device and an electronic control unit, wherein the high temperature furnace reaction unit uses two-section heating, the temperature of the furnace body is set, collected and transmitted by the electronic control device; and when in an experiment, the air control device adjusts the air atmosphere in the high temperature furnace reaction unit, a sample is rapidly placed in a constant temperature zone of the high temperature furnace reaction unit to realize rapid heating up by a balance lifting mechanism in the balance weighting device, and mass change of the sample is converted into electronic signals in real time to be transmitted to the electronic control device for continuous monitoring and storing. The invention has the characteristics of large controllable range of heating rate, large range of test sample amount and controllable reaction atmosphere, thus meeting the requirement of the thermobalance test research under various reaction conditions with different sample amounts and heating rate; and common measurement equipment can perform on-line air component analysis, thus being favor of disclosing the action mechanism and control strategy in the reaction process.

The invention relates to a wheat plant moisture monitoring method based on a canopy high spectral index, which uses two-year wheat pool-planted test data of two-year 2 varieties under 4 different moisture treatments, adopts a decrement fine sampling method, and analyzes the quantitative relationship between a high spectral index combined by any two wave bands of an original spectrum and a reciprocal spectrum within the waveband range of 350-2500 nm and the wheat plant moisture content and the leaf layer moisture content; results show that the wheat plant moisture content can be monitored based on spectra of NDVI (R836, R793) and RVI (RC837, RC793), and the wheat leaf layer moisture content moisture content can be monitored based on original spectra of NDVI (R1100, R770) and RVI (R893, R805). The research conclusions of the invention provide new wave band combination and theoretical basis for the rapid lossless monitoring of wheat moisture conditions by using high spectral data.

The present invention provides microcantilever hotplate devices which incorporate temperature compensating strain sensors. The microcantilever hotplate devices of the present invention comprise microcantilevers having temperature compensating strain sensors and resistive heaters. The present invention also provides methods for using a microcantilever hotplate for temperature compensated surface stress measurements, chemical/biochemical sensing, measuring various properties of compounds adhered to the microcantilever hotplate surface, or for temperature compensated deflection measurements.

A toploading weighing instrumentality which determines loss on drying by a cylindrical microwave. The cylindrical cavity of the microwave includes a power supply, a magnetron, a power module operatively coupled between said power supply and said magnetron for driving said magnetron, a wave guide communicating with the magnetron and with a microwave containment chamber for delivering energy thereto, at least one microwave energy sensor for sensing microwave energy or magnetic and/or electric field strength within the chamber for controlling, inter alia, the loss on drying process of the sample being assayed and determining when the drying process is complete. A precision electronic balance is operatively disposed within the microwave chamber for allowing a specimen being assayed to be weighed. In addition, a ventilation chamber is provided for venting moisture from the microwave chamber. A processing unit and associated memory allows means for data acquisition, processing and storage of data from the power module driving the magnetron, the microwave energy sensor(s) for sensing magnetic and/or electric fields and the electronic balance for weighing the initial and final weights of the specimen for loss on drying moisture analysis. Both signaling the removal of microwave energy in the chamber.

The invention relates to a method for measuring the contents of silicon-calcium elements in a silicon-calcium alloy. After a sample is grinded and passes through an analysis sieve with 180-200 meshes, the method provided by the invention is characterized in that the sample is fused at high temperature by adopting an alkali fusion method; the fusion course comprises the steps of: weighing and adding the sample and sodium hydroxide solid to a nickel crucible; after adding the mixture to a high temperature furnace to be heated, taking out and cooling; washing the fused analysis sample to an evaporation dish by utilizing deionized water and hydrochloric acid; drying and adding the hydrochloric acid to be acidized; adding warm water to be stirred until soluble salts are completely dissolved; instantly filtering by utilizing quantitative filter paper; enabling the filtrate to be constant volume in a volumetric flask to prepare a sample analysis solution; and maintaining the precipitations to be analysis components. The method for respectively measuring the contents of silicon and calcium provided by the invention comprises the following steps: measuring the content of the silicon with precipitation and filter paper by utilizing a weight analysis method after ashing, firing, cooling and weighing; and measuring the content of the calcium with the sample analysis solution by utilizing a volumetric method. The method provided by the invention has the advantages of once sample weighing, multi-element continuous measurement, time and labor saving, energy conservation, consumption reduction and the like and can reduce the damage of hydrofluoric acid to human bodies and environments.

The invention relates to a standard distribution sample for detecting comprehensive performance of an environmental chamber and a detection method thereof and belongs to the field of indoor environment detection. The sample comprises a polytetrafluoroethylene cylindrical container of which the upper end is opened, organic volatile matter VOC liquid accommodated in the container, a barrier layer arranged on the upper end face of the cylindrical container and a sealing device fixing the barrier layer. The method comprises the following steps of: establishing a model; measuring the ventilation rate of the environmental chamber to be detected; placing the sample in the environmental chamber to be detected, placing the sample on an electronic balance, and recording the mass change of the standard distribution sample in real time; when the environmental chamber is in a sealed state, distributing the VOC liquid in the cylindrical container, calculating a distribution rate with the model according to the mass change, and calculating VOC concentration in the environmental chamber; acquiring the VOC concentration at an outlet of the environmental chamber in real time; and comparing the measured value and the calculated value of the VOC concentration to evaluate the comprehensive performance of the environmental chamber. The standard distribution sample and the detection method for the standard distribution sample have the advantages of simpleness and convenience, easy operation and relatively high precision and reliability.

In a thermomechanical measuring device and a thermogravimetry device, partition walls are provided in two sections such that two kinds of atmospheric gasses, which have passed a sample chamber and a detector chamber, respectively, do not flow back, and a thermally insulated gas mixing chamber is manufactured anew in the middle of the sample chamber and the detector chamber to make it possible to dilute a reactive gas and a water vapor gas having a high partial pressure. Consequently, it is possible to prevent moisture concentration to reduce an influence of water drops even in a high temperature and high humidity state at the time of humidity control and measurement.

The invention discloses an experimental device and a representation method of multiphase medium high-temperature corrosion rate. The experimental device comprises an air distribution device, a heating device and a tail gas treatment device which are communicated sequentially, wherein the air distribution device comprises a mixing device and a plurality of air bottles which are communicated with the mixing device; a quality flow meter connected with a computer is arranged among the mixing device and the air bottles; and the heating device comprises a heating furnace and a quartz tube reactor in the heating furnace. The representation method comprises the following steps: carrying out a gas phase or gas-liquid phase high-temperature corrosion experiment on a test sample according to the experiment requirement, thereby obtaining the decrement of the weights of the test sample before and after being corroded, and then converting the decrement into the thickness of the corroded test sample as the generation thickness of the corrosion layer during the test period of the test sample; and carrying out line energy spectrum line scanning experiment on the corroded test sample, thereby obtaining the maximal migration depth of a corrosive element in the thickness of the test sample, and finally calculating the high-temperature corrosion rate. By adopting the experiment device and the representation method provided by the invention, the high-temperature corrosion rate and the corrosion degree of a corrosive factor on the test sample are truly reflected from the macroscopic and microcosmic views.

The invention discloses a method for sampling and measuring filth degree of an insulator. The method provides a cleaning and sampling method for flushing by a pressure watering can, adds a project for measuring gray density in the measuring process, and solves the problem that the filth degree measuring project is not complete, so that the test result is more in accordant with the true situation. The invention also discloses a special set of sampling funnel equipment, and the equipment is portable to sample on site.

The invention discloses a method for detecting the quality of a compound capsule prepared from 8 kinds of amino acids and 11 kinds of vitamins, mainly comprising the steps of detecting whether the inclusion of the capsule is yellow or tangerine powder or particles, differentiating, checking the loss on drying and measuring the contents of amino acids, vitamin C, niacinamide, vitamin B1, vitamin B6, vitamin B2, calcium pantothenate, folic acid, vitamin A, vitamin D2, vitamin E and 5-hydroxy o-aminobenzoic acid in the capsule by adopting the high-performance liquid chromatography. The method for detecting the quality of the compound capsule prepared from 8 kinds of amino acids and 11 kinds of vitamins is scientific and reasonable, has high degree of accuracy, good repeatability, can comprehensively and effectively control the quality of the compound capsule prepared from 8 kinds of amino acids and 11 kinds of vitamins, and can ensure the clinical efficacy of the preparation.

The invention provides a test method for blast furnace coke reactivity. According to the method, conventional equipment is utilized, by obtaining the weight loss rate variation of coke at different temperature and the initial temperature of the carbon solution loss reaction of coke, the reactivity of coke is characterized. The method comprises: grinding a selected to-be tested coke sample into fine powder, drying, taking out the coke sample, cooling to room temperature, sealing for usage; weighing the coke sample for usage, putting in a test apparatus, continuously raising the temperature, introducing a reaction gas CO2, when the heating terminal point is reached, finishing computer data acquisition, and storing the acquisition data; finally processing the data acquired by a computer; and finally characterizing the reactivity of coke by obtaining the weight loss rate variation of coke at different temperature and the initial temperature of the carbon solution loss reaction of coke. According to the method, test equipment such as a thermo gravimetric analyzer and the like are employed, the reaction situation of coke with CO2 at different temperature can be comprehensively analyzed, and true objective evaluation on the reactivity of cokes with different quality can be made.

Disclosed is a rapid industrial analysis method for coals, which gets a moisture value, an ash value, a volatile value and a fixed carbon value in a coal sample after carrying out a moisture test, an ash test and a volatile test on the coal sample; the method carries out a test on an ash air-dried coal sample and a volatile air-dried coal sample at the same time in an identical high temperature furnace to get the ash value and the volatile value. The invention is the rapid industrial analysis method which has the advantages of short test time, high work efficiency and accurate test results, as well as can satisfy the rapid on-line analysis requirements for an industrial field.

The invention discloses a device for measuring the heating mass loss rate of explosive powder. The device comprises a drying box, wherein a through hole is formed in the bottom of the drying box; a measurement bracket is arranged in the through hole; a tray type balance is arranged on the measurement bracket; the measurement bracket comprises a heat insulation cover, an upper disk, a lower disk and a bracket rod; the upper disk is positioned in the drying box; the lower disk is positioned outside the drying box. Due to rod type connection, the mass of a grain or powder of the explosive powder in the drying box is directly measured; a process that a sample is taken out to be cooled is avoided; the weighing time is shortened; the adverse effects, which are caused by the change of the environment, on the sample are reduced; furthermore, the device is simple in structure and easy to operate, and the heat loss in the drying box in an aging process and a measuring process can be reduced; shaking during sample weighing is alleviated; the stability of a result is guaranteed.

The invention relates to a method for determining the spreading rate of paper-process reconstituted tobacco finished products, which belongs to the technical field of reconstituted tobacco. The method includes steps: a, taking a certain quantity of paper-process reconstituted tobacco and a sheet base to be shredded, and the placing the tobacco shreds into a constant-temperature and constant-humidity box with the temperature of 22 DEG C and the humidity of 60% to balance for 48 hours; b, weighing a certain quantity of reconstituted tobacco shred samples m1 to be placed in a solvent cup of a Soxhlet extractor, adding distilled water according to feed to liquid ratio of 1:30, and setting the circulation times of the Soxhlet extractor to be 10 times, and the extracting temperature to be 19-level and the temperature of a condensing circulation pump to be 2 DEG C to extract; c, taking out the samples after extraction is finished, transferring the samples into an aluminum box reaching the constant weight of m0, placing the aluminum box into a drying oven, drying the samples at the temperature of 100+/-1 DEG C so that the constant weight of the aluminum box is m2, realizing the precision of the constant weight to be 0.001g, determining moisture content w of the samples, and extracting the sheet base of the reconstituted tobacco by the same method; and d, calculating the spreading rate according to a formula. The method has the advantages that the method is simple, and is applicable to determining the spreading rate of the paper-process reconstituted tobacco finished products.

The invention relates to a method for testing the thread tobacco ratio of cigarette, which comprises: a, arranging the cigarette into the condition with the temperature as 20+-2 Deg. C and the humidity as 65+-5% to be balanced for 24+-2 hours, then taking out the thread tobacco from cigarette to be weighted as W; b, under the microscope, based on different appearances of variable thread tobacco, selecting thread tobacco, expanding thread, paper sheet, rolling sheet and non-expanded thread, to be weighed and recorded as A, B, C, D, E; c, inputting thread into container, and adding organic solvent whose density range is 0.83+-0.02 to be mixed and laid for 1-3 minutes, and taking out the expanding thread floating on the liquid to be input into bake stove at 90-110Deg. C to be weighted and recorded as P; d, calculating to obtain the ratios of different threads. The invention has high speed and high accuracy to support controlling the ratio of doping thread in cigarette.

The invention relates to an ultra-low temperature freeze-thaw cycle test method of a cement-based material. In the method, liquid nitrogen is taken as a freezing raw material, and with utilization of the ultra-low temperature effect of the freezing raw material in gasification, the matrix of the cement-based material is damaged from the gel pore level so as to speed up freeze-thaw damage progress and quickly evaluate the freezing resistance and durability of the cement-based material. The invention achieves the convenience and quickness of the freeze-thaw cycle test of the cement-based material, and solves the problem of inconveniences of construction work and quality control due to slow process of the freeze-thaw cycle test. Moreover, the invention has the advantages of convenient, fast, good economic benefit and the like.

The invention discloses a method for determining constituents of soil at a tailings mining area. The method comprises the following steps: firstly, carrying out soil sampling; and secondly, determining the physical properties, the chemical properties and the biological constituents of the sampled soil. The soil sampling comprises the following specific processes: digging a soil profile at a sampling point; carrying out layering by the sizes of 0-5cm, 5-10cm, 10-20cm, 20-40cm and 40-60cm; and then carrying out layered sampling on the soil respectively with an aluminum box, an annular cutter and a soil bag. By the method for determining the constituents of the soil at the tailings mining area, reliable data can be provided for the improvement on the ecological environment of the tailings mining area, and therefore the method is beneficial for the sustainable development of society, economy and environment of the tailings mining area.

The invention discloses a measurement method of a coating rate for a paper-making reconstituted tobacco. The method comprises the following steps of: (1) drying a sample box and a paper-making reconstituted tobacco finished product, cooling the dried sample box and the dried paper-making reconstituted tobacco finished product in a dryer, weighing the sample box and recording the value as m0, and weighing the paper-making reconstituted tobacco and recording the value as m1; (2) placing the paper-making reconstituted tobacco in the sample box, soaking the sample box with the paper-making reconstituted tobacco in water twice, filtering the resulting product, drying the filtered product, cooling the dried product in the dryer, weighing the cooled product and recording the value as m2; and (3) calculating the coating rate x for the paper-making reconstituted tobacco: x=[m1-(m2-m0)]/m1*100%; or simultaneously carrying out step (1) and step (2) on a plurality of samples of the paper-making reconstituted tobaccos at different weights, and fitting a straight line by taking m1 as X-coordinate, m1-(m2-m0) as Y-coordinate to obtain a gradient, namely, the coating rate X. The measurement method of the coating rate for the paper-making reconstituted tobacco is simple, convenient, and capable of accurately and objectively measuring the coating rate of the paper-making reconstituted tobacco.

The invention relates to an application and a method of a TGA-IR-GCMS triple machine (thermogravimetric analyzer-infrared spectrometer-gas chromatography mass spectrum) in tobacco analysis. A thermogravimetric-infrared-gas chromatography mass spectrum (STA-IR-GC-MS) triple machine is employed to perform thermogravimetry-infrared-gas chromatography mass spectrum analysis for components of cigarette smoke. A cigarette sample is placed in a thermogravimetric sample cup; high-purity nitrogen or an oxygen-nitrogen gas mixture is introduced into the thermogravimetric analyzer; preliminary determination of the structure is performed by purging pyrolysis products of the sample in such atmosphere by the gas into an online-detecting infrared spectrometer; then accurate qualitative determination of the cigarette sample is performed by purging the products by the gas into a GC-MS for detection; and pyrolysis products of different time points and temperature points are analyzed. The method of the invention has the characteristics of simple operation, rapid analysis speed, comprehensive detection and the like, can perform online detection, analysis and qualitative determination of the pyrolysis products of the cigarette, and provides a scientific and reliable analysis method for mechanism and principle research in aspects of cigarette additives, safety evaluation, harm reduction and tar reduction, etc.

A method for accurately measuring out transpiration efficiency of plant includes using sealed culture container to suppress evaporation of water at ground surface to nearly be zero, measuring weight variation of culture container with plant grown in it to obtain water consumption amount of transpiration and taking plant sample to obtain dried substance accumulation amount for calculating out transpiration efficacy of plant .The measuring device for realizing said method is also disclosed.

The invention relates to a method for measuring and calculating all iron content in imported iron ore. The steps are as follows: 1. preparing a sample into an analytical sample according to the standard; 2. firing and weighing the analytical sample to obtain the sample firing decrement LOI; 3. fusing the sample with the firing decrement tested according to the standard to prepare a test sample; 4. placing the prepared test sample into an X-ray fluorescence spectrometer to test the content of each element to be tested, and storing the data into the test software database of the X-ray fluorescence spectrometer; 5. using an infrared carbon and sulfur tester to test the content of S in the analytical sample; 6. working out the computational formula on TFe={100%-(SiO2+Al2O3+CaO+1.2912*Mn+MgO+2.2914*P+Na2O+K2O+2.4971*S+TiO2)*(1-LOI)%}*0.6994 in Excel; and 7. substituting the firing decrement and content of each element into the computational formula to automatically calculate the all iron content TFe in the sample to be tested. The application of the calculating method can solve most of all iron measurement problems, thus exerting tremendous effect in practical test work, greatly shortening workflow, improving working efficiency, ensuring license authorizing efficiency, and satisfying the requirements of test work under the condition that iron ore import increase rapidly.

The invention belongs to a spontaneous combustion easiness judgment method of coal, in particular to a spontaneous combustion danger judgment method of the coal. The method includes the following steps: 1. sampling: a coal sample is collected on a coal working face, sealed and then taken back to a laboratory; the coal sample is ground to be below 50 mesh in the laboratory and put into a dry and clean jar which is labeled; the label will indicate the sampling place and the coal sample preparation time; the jar is sealed by a rubber sleeve; 2. testing: an experiment is taken by a thermogravimetric analyzer; during the experiment, temperature control and data collection are completed by the thermogravimetric analyzer; 3. operation and calculation: calculation of the reaction activation energy is according to an Arrhenius equation; the judgment method is to judge the spontaneous combustion easiness of the coal by the ''ignition activation energy'' in oxidation spontaneous combustion reaction between the coal and the oxygen, without need of a lot of equipments and instruments; the analysis and judgment can be conducted only by one thermogravimetric analyzer; the judging reliability is high.

The invention discloses a gas hydrate sampling and analyzing device and a method. The device comprises a hydrate generation kettle, a sampling module, a drive control module, a sample decomposition module, a weighing analysis module and a vacuumizing module, wherein a stirrer is arranged in the hydrate generation kettle; a gas inlet pipe and a liquid inlet pipe are connected to the top part of the hydrate generation kettle; the sampling module is formed by a transparent high pressure resistant resin glass tube, an upper compression piston, a lower compression piston, an upper hydraulic linkage shaft, a lower hydraulic linkage shaft and a sample delivery pipe; the weighing analysis module comprises an electronic analytical balance, a gas chromatograph and relevant connecting pipelines and components; the drive control module comprises a compression piston, a drive linkage shaft, a hydraulic driver, a spiral elevator, a control computer and the like; and the vaccumizing module is formedby a vacuum pump and relevant connecting pipelines and components. Any height space in a reaction kettle can be sampled with any volume, and any phase state of gas phase, solution phase, hydrate slurry phase and hydrate phase in a hydrate reaction system can be sampled and analyzed.

The present invention is method of determining water content in crude oil. The method includes cooling crude oil in a refrigerator and inclining and stirring to separate out free water from crude oil, weighing the free water in a electronic balance, determining the weight of emulsified water and suspend water in centrifugal process or distilling process, calculating the total water weight, and calculating the weight percentage of water in crude oil. The perfected method has raised determining precision.

A method and apparatus for testing materials according to various aspects of the present invention comprises an oven and a control system. The oven is configured to receive a test material for testing and expose the test material to heat to promote drying and/or ashing. The control system receives data, such as temperature data from the oven, and controls the temperature in the oven accordingly.