155 results about "Analytical balance" patented technology

An electric wire and cable conductivity, tensile strength and aging comprehensive testing device comprises a testing control system, an analytical balance, an electrical bridge with a clamp, an insulation resistance tester, a tension testing machine, a high-temperature low-temperature humidity thermal cycling testing machine, an air-exchange aging testing machine, an ozone-proof aging testing machine, an xenon lamp weather-proof testing machine, a gas analysis device and a test control system. The device can test mechanical performance of an electric wire and cable, electric performance of the electric wire and cable and performance of the electric wire and cable under the influence of environment at a time, can effectively reduce work load of a test of the electric wire and cable, enables the test of the mechanical performance, the electricity performance, and the performance of the electric wire and cable under the influence of the environment to be concentrated and effective, and can synchronously test components of released gases of a cable with a sheath in the aging process.

A measuring apparatus, for instance an analytical balance, can set parameter values for performing specific measuring tasks and/or for effecting communication with an operating person. Sets of such parameter values are stored as profiles. The measuring apparatus is equipped with a recognition device, for recognizing an operating person and activating a stored profile assigned to that person.

A 3D static balance measuring method utilizing ball form rotator of gyroscope includes using only one electronic analysis balance in high accuracy to carry out multitime of space multiangle weighing then utilizing mathematical statistic method to eliminate off random error of measurement for deriving out 3D space eccentric position of ball form rotator. The measuring device used for realizing said method is also disclosed.

The invention discloses a micro fixed-bed reactor capable of realizing online thermal-state weighing and a method. The device comprises an analytical balance, a thermal-radiation-preventing water cooling plate, a weighing rod, a liftable electric furnace, a silk screen bed layer, a thermocouple, a gas circuit and temperature control system, a transparent container, a fixed bed provided with an air distribution plate and a support, wherein the thermal-radiation-preventing water cooling plate is fixedly connected with the top of the transparent container; the top end of the weighing rod is located in the fixed bed, and the bottom end of the weighing rod is located on a tray of the analytical balance; the silk screen bed layer is fixedly connected with the top end of the weighing rod; the liftable electric furnace is fixedly connected with the outer side of the fixed bed; the temperature measuring end of the thermocouple is located in an inner cavity of the fixed bed, and the connecting end of the thermocouple is connected with a temperature measuring port of the gas circuit and temperature control system through a lead; a mass flow meter outlet of the gas circuit and temperature control system is connected with a ventilating port of the air distribution plate. With the adoption of the micro fixed-bed reactor and the method, online thermal-state weighing can be performed on solid reaction substances located in the fixed bed.

The invention belongs to the technical field of the thermomagnetic measurement of magnetic materials, and relates to a magnetic material curie temperature measuring method based on thermogravimetry changes. Through measuring the changing relationship between balance apparent weight and temperature under the effect of a low field intensity applied magnetic field, the curie temperature of a magnetic substance is obtained. The suction effect of an electromagnet to the magnetic substance is related to magnetic field intensity and also relies on the gradient changes of the magnetic field intensity, therefore the obvious thermogravimetry changes can be obtained under a non-uniform field intensity applied magnetic field with relatively lower field intensity, and the changes can be easily measured by a high-precision analytical balance. According to the magnetic material curie temperature measuring method based on the thermogravimetry changes, the obvious thermogravimetry changes can be obtained by using the non-uniform field intensity applied magnetic field with the relatively lower field intensity, and then the curie temperature of the magnetic substance can be measured; the problem of coil heating caused by the fact that a high-intensity magnetic field needs to be loaded when materials with weaker magnetism are measured by using a magnetic-thermo curve method is avoided; the method is economical and convenient, and is easy to popularize.

The invention discloses a tree leaf surface dust amount determination method and system, and belongs to the field of measurement and computer technology. The method comprises the following steps of building an estimatation equation and determining equation parameters, collecting leaf samples, weighing leaf weight by a one over ten-thousand analytical balance, measuring a reflected light spectrum of the leaves before dedusting by a portable spectrometer, removing dust on the leaf surfaces by deionized water, weighing leaf weight after dedusting, measuring a reflected light spectrum of the leaves after dedusting by the same method, acquiring spectrum parameters and building a relationship between the spectrum and leaf surface dust amount. The method can realize determination of leaf surface dust amount by the portable spectrometer without a high-precision electronic balance and thus the leaf surface dust amount can be estimated by the common spectrometer. The method is very suitable for plant pollution degree estimation and haze prevention and control measure optimization.

The invention relates to a determination method for ration of a reconstituted tobacco finished product and belongs to the technical field of reconstituted tobacco. The determination method is characterized by comprising the following steps: selecting a plurality of small reconstituted tobacco finished product pieces with smoothness, no damage and no crinkle as samples; trimming irregular edges and burrs of the samples to be straight; accurately weighing the weight (W, g) of the samples by using an analytical balance; obtaining a digital image of the samples by an image acquisition system; obtaining the area (S, cm<2>) of the detected samples by an image processing and analyzing system; and calculating according to the quality and the area of the reconstituted tobacco samples to obtain the ration (D, g/m<2>) of the reconstituted tobacco samples. The determination method disclosed by the invention has the advantages of simplicity and suitability for determining the ration of the reconstituted tobacco finished product.

The invention discloses a device and a method used for measuring the density of a trace amount of volatile liquid. The device comprises a gas phase sample introduction bottle, a drier, an analytical balance, a trace amount sample introduction device, and a master control device; the gas phase sample introduction bottle is used for storing the volatile liquid to be measured; the drier is used for drying the gas phase sample introduction bottle; the analytical balance is used for weighing the gas phase sample introduction bottle before and after storing of the volatile liquid to be measured; the trace amount sample introduction device is used for injecting the volatile liquid to be measured into the gas phase sample introduction bottle; the master control device is used for calculating the density of the volatile liquid to be measured. The device and the method can be used for measuring the density of the trace amount of the volatile liquid accurately.

The invention discloses a shale aperture measurement device and method based on imbibition and ion diffusion property. The device comprises a high-precision analytical balance (1), a support (2), a flask (3), a fishing line (4), a magnetic stirrer (5), a lifting system (6), a conductivity meter (7) and a constant temperature humidity chamber (8). According to the shale aperture measurement device and method based on the imbibition and the ion diffusion property, in a way of experimental measurement, characteristic high capillary force imbibition and strong ion diffusion property of shale are given full play to, a high-precision shale imbibition and ion diffusion synchronous detection device is designed, an average aperture evaluation methodology suitable for shale is provided, and science and precision of shale aperture measurement are further improved; the shale aperture measurement method based on the imbibition and the ion diffusion property has the advantages of being simple in operation, small in environmental influence, low in testing cost and reliable in result.

The invention discloses an analytical method for the content of short fibers in pole plate lead paste of a lead-acid battery. The method comprises the following steps: dissolving positive plate lead paste with a mixed solution of nitric acid and hydrogen peroxide, or dissolving lead paste, a green plate and negative plate lead paste with a nitric acid solution; sieving and separating short fibers, and carrying out drying to obtain the short fibers; measuring the content of the short fibers with an analytical balance and calculating the mass percent of the short fibers in lead paste; wherein, the mixed solution of nitric acid and hydrogen peroxide is obtained by adding 20 mL of hydrogen peroxide with a mass concentration of 30% into 1000 mL of nitric acid with a mass concentration of 12%, and the nitric acid solution is nitric acid with a mass concentration of 12%. The method provided in the invention analyzes the content of short fibers in lead paste so as to determination uniformity of short fibers in lead paste and the content of short fibers in lead paste in a cured and dried green plate and in formed and dried positive and negative plates so as to determination whether there is a loss, thereby enabling the content of short fibers to meet technical requirements, strength of lead paste to be achieved and vibration resistance, cyclic endurance and no shedding of lead paste ofbattery pole plates to be guaranteed.

The invention discloses an identification method of resistance to aspergillus flavus infection of peanuts and an application thereof. The identification method disclosed by the invention comprises the following steps: inoculating an aspergillus flavus strain into peanut seeds, further performing dark culture, then adopting a measuring instrument, namely an analytical balance, weighing the seeds after dark culture, finally calculating an aspergillus flavus infection index and performing resistance evaluation. According to the identification method disclosed by the invention, the resistance to the aspergillus flavus infection of a peanut variety can be effectively identified under relatively simple experimental conditions, and the identification method is particularly suitable for batch screening of peanut breeding materials, and has the advantages of simple operation, low resistance identification cost, accurate experimental results and high precision.

The invention discloses a method for determination of calcium sulfite and calcium carbonate content of flue gas desulfurization gypsum and belongs to the method for determination of calcium sulfite and calcium carbonate content. The method comprises respectively dissolving flue gas desulfurization gypsum subjected to full oxidation treatment and unoxidized flue gas desulfurization gypsum by a diluted hydrochloric acid solution, determining mass losses of the flue gas desulfurization gypsum and the unoxidized flue gas desulfurization gypsum by an analytical balance in dissolution, calculating calcium carbonate content of the flue gas desulfurization gypsum according to the mass loss of the flue gas desulfurization gypsum subjected to full oxidation treatment, and calculating total content of calcium sulfite and calcium carbonate of the flue gas desulfurization gypsum according to the mass loss of the unoxidized flue gas desulfurization gypsum, wherein the difference of the calcium carbonate content and the total content of calcium sulfite and calcium carbonate is the total content of calcium sulfite of the flue gas desulfurization gypsum. Calcium sulfite of the flue gas desulfurization gypsum produces large influence on portland cement setting time and strength, and through determination of calcium sulfite and calcium carbonate content, flue gas desulfurization gypsum slow setting effects on portland cement can be determined. The method promotes large scale use of flue gas desulfurization gypsum as industrial waste residue. The method has the advantages of simple determination method, accurate result and low determination cost.

The invention provides a liquid-to-metal corrosion testing device, which comprises two fully transparent corrosion container kettles with scales, two sets of S-shaped condensation pipes, a thermostatic water bath, a circulating cooling water bath, a full-automatic liquid level control device, an analytical balance and an iron support, wherein the transparent corrosion container kettles are semi-submerged in the thermostatic water bath at the constant temperature of 55 DEG C, liquid to be tested is poured into the kettles, a sheet metal is pre-manufactured according to the technical requirement in the test and standard manual, the mass of the sheet metal is weighed, and the sheet metal is hung in the kettles in a suspended, semi-submerged and full-submerged mode and is kept standing for seven days. In order to prevent the liquid in the kettle from being evaporated, a set of condensation device is connected to the upper side of the kettles and is communicated with the kettle opening. After the test is finished, the sheet metal is taken out, washed and dried, the mass of the sheet metal is weighed and is compared with the mass before test, and the maximum corrosion rate is calculated.

The utility model relates to a solenoid type determinator for relative magnetic susceptibility, which belongs to a magnetism determination device on strong magnetism minerals; wherein, one end of a thin-walled glass tube of the determinator is connected with an analytical balance; the main body is inserted into a hollow solenoid coil, which is connected with a double switch; the double switch is connected with a direct-current power supply and a switch. The switch is connected with the direct-current power supply, and a direct-current amperemeter is connected in the loop of the switch. The utility model has the advantages that the structure is simple, the thin-walled glass tube inserted into the hollow solenoid coil is always stable and the measurement is precise.

The invention discloses a method for detecting holdup of split phases in oil sludge based on an induction heating technique and a measuring system. The detection method is based on the formation mechanism and physical-chemical characteristics of the oil sludge, the induction heating technique is adopted, the oil sludge is pyrolyzed according to the set heating curve, and the oil gas and water steam produced by pyrolysis are condensed and collected, and are sent into a metering cylinder; the oil and water in the metering cylinder are naturally separated, the volume of water at the lower layer is read via the scales of the metering cylinder, and the mass of the water is obtained by combining with density; the total mass of oil and water is weighed by an analytical balance, the mass of the water is deducted, and the mass of the oil is obtained; the mass of the oil and the mass of the water are deducted from the mass of the oil sludge, so as to obtain the mass of residue, thereby calculating the holdup of split phases in the oil sludge; by adopting the detection method, the holdup of split phases in the oil sludge can be simultaneously detected, the stored and transported oil sludge can be quickly detected within about one hour, and the detection absolute errors of the three phases are respectively smaller than 2%. The measuring system mainly consists of an induction heating powersupply, an induction heater, a temperature detection module, a controller, a condensing device and a metering test tube.

The invention relates to an electronic analytical balance capable of conducting horizontal calibration. The electronic analytical balance comprises a measurement base and a measurement chamber arranged on the measurement base, wherein the measurement base comprises a control panel, a display screen and a measurement platform arranged on the upper surface of the measurement base, the measurement chamber comprises a glass face plate and a frontward-opened door, at least three supports which are independent of one another are arranged below the measurement base, each support can be stretched out and drawn back, a level gauge is arranged on the measurement base, alcohol is filled into a level tube, a bubble is contained in the level tube, and markings are marked on the surface of the level tube. The technical scheme is adopted for the electronic analytical balance, therefore, the balance can be in the horizontal state in each time of measurement, measurement errors are reduced, and the aim of accurate measurement is achieved through the electronic analytical balance.

The invention relates to a method and apparatus for determining apparent density of a pervasive solid substance. A specific gravity bottle or Webster balance can be used for determining the density of insoluble solid, the density of soluble solid can be determined by utilizing a gas specific gravity method, but the requirement for the instrument manufacturing precision is high, and the economic performance and convenience are poor. The method is characterized in that solid fluid is adopted as a volume replacement medium; the volume of a to-be-detected substance is determined by utilizing a special volume determination apparatus; the mass of the to-be-detected substance is determined by utilizing an analytic balance; the determination of the apparent density is realized by virtue of calculation of a special formula. The apparatus consists of a lower bottle body, a middle bottle body, an upper bottle body, a measuring range tube and charged solid fluid. The apparatus is simple in structure, practical and economical; the solid fluid can be reutilized and is environment-friendly; the solid fluid is charged in one step, the to-be-detected substance is separated from the solid fluid by utilizing a fixed screen in the process for inverting the apparatus, and the operation is very convenient; the apparatus is suitable for determining the apparent density of all solid substances, and the difficulty for determining the apparent density of soluble or wettable solid substances with irregular shape can be solved.

The invention relates to a permanent magnet temperature coefficient open-circuit measuring device and method. The permanent magnet temperature coefficient open-circuit measuring device comprises a balance support. The balance support is a box. A rack is placed at the bottom inside the balance support. A uniform gradient field generating device is placed on the rack and connected with a constant current power source. A high temperature furnace is placed on the uniform gradient field generating device or penetrates through the uniform gradient field generating device to be placed on the rack. The high temperature furnace is connected with a temperature control unit. An analytical balance is placed at the top of the balance support and connected with a computer. The computer is further connected with the temperature control unit. A sample suspension line is fixed to the lower end of the analytical balance. The sample suspension line penetrates through the top face of the balance support to extend into the high temperature furnace. The tail end of the sample suspension line is connected with a sample sleeve. A sample to be measured is placed inside the sample sleeve. According to the permanent magnet temperature coefficient open-circuit measuring device and method, the problem that at present, the accuracy and resolution ratio of permanent magnet temperature coefficient measurement are low is effectively solved, and the method and means are provided for measurement of critical materials in the aerospace field.

The invention discloses a transport plane half-mold blowing high lift wind tunnel test method and a test device. The test method comprises the following steps: step a, calibrating the influence of high-pressure air on balance load after passing through an air bridge; b, installing a test device and a test model, and adjusting the attitude angle of the test model to a zero point; c, calibrating a momentum coefficient; d, adjusting the attitude angle of the test model to a zero point, and collecting an initial reading; e, adjusting the wind speed to a test wind speed, and adjusting the blowing capacity coefficient to a test state; f, adjusting the attitude angle of the test model, and recording a balance signal, an attitude angle signal, a pressure sensor signal and a temperature sensor signal; step g, processing balance data; and step h, analyzing balance data. By the adoption of the half-mold blowing lift-augmentation wind tunnel test method and device for the transport plane, the precision of blowing parameter control and aerodynamic force measurement is improved; and reliable wind tunnel test data is provided for the evaluation of the air blowing lift augmentation aerodynamic performance of transportation aircrafts.

The invention discloses a method capable of accurately measuring ash content in coal. A muffle furnace is selected as a furnace body; a rectangular porcelain ash dish is selected; a drier and an analytical balance are selected; heat-resistant porcelain plates or asbestos plates are selected; Use the ash dish pre-selected and burned to a constant mass, weigh 1±0.1g of an air-dried coal sample with a particle size below 0.2mm, and spread it evenly in the ash dish so that the mass per square centimeter does not exceed 0.15g; send the ash dish into In the muffle furnace, close the furnace door and leave a 15mm gap in the furnace door, slowly raise the furnace temperature to about 500°C within 30 minutes, and keep at this temperature for 30 minutes, continue to rise to 815±10°C, and Burn at this temperature, take out the ash dish from the furnace, put it on a heat-resistant porcelain board or asbestos board, cool it in the air for about 5 minutes, move it into a desiccator to cool to room temperature, and weigh it; The mass after the last burning is the basis for calculation. The method can accurately detect the parameters of the ash content produced by the coal and has high efficiency.

The invention discloses a double-sided coated plate film weight measuring method. It includes the following steps: using white cleaning cloth or sand paper to scrape off the sample single face film to expose the base material; using solvent permeated sand cloth to clean the film; dying the sample surface; clicking out the sample with certain area; using unmixed solvent to clean the two sides of the sample; drying; weighing on the analytical balance; dipping into inorganic solvent to remove another coating; taking out to wash and dry; using analytical balance to weight; dividing the different value of the two-time weighting by sample area to gain unit area coating film weight. This method is fast, exact, and has small error.

The invention provides a method for degrading sodium alginate and agar composite membrane by using Zobellia galactanovorans. The method comprises the following steps: degrading a sodium alginate and agar composite membrane disc prepared early in a culture solution containing Zobellia galactanovorans for a period of time to obtain a degraded membrane, taking out the degraded membrane, filtering, washing, freezing-drying, weighing with an analytical balance, and comparing the degraded membrane with the membrane before degradation, wherein a result shows that the method disclosed by the inventionhas a relatively good degradation effect. The method disclosed by the invention is safe, environmentally-friendly, convenient and capable of effectively avoiding environmental pollution caused by film degradation by using a conventional chemical method, and has a very broad application prospect.

The invention discloses a method capable of accurately measuring the volatile mass in coal. A crucible for volatile matter and a crucible frame are selected; a pyrometer and a temperature regulating device are selected; a crucible frame clamp and an analytical balance are selected; Type or lever type cake press machine; use a stopwatch and dryer; use a porcelain crucible with a cover that has been burned at a temperature of 900 °C to a constant quality, weigh the air-dried coal sample, and then gently shake the crucible to flatten the coal sample , placed on the crucible rack, lignite and long-flame coal should be pre-pressed cakes, and cut into small pieces of about 3mm, pre-heat the muffle furnace to about 920 ° C, open the furnace door, and quickly put the crucible on the shelf Send it into the constant temperature zone and close the furnace door, heat accurately for 7 minutes, take out the crucible from the furnace, cool it in the air for about 5 minutes, move it into a desiccator to cool to room temperature, weigh it; calculate the result. The method can greatly improve the detection accuracy, and improve the detection efficiency, so that the detected coal can meet the expected requirements when used.

The invention relates to a method for determining the contents of volatile component industrial components of refuse-derived fuel (RDF) and calculating a heat value of the RDF. The method is characterized in that characteristic temperatures T1, T2 and T3 appearing when the various volatile industrial components are released, the contents V1, V2 and V3 of the volatile component industrial components 1, 2, and 3, and the moisture content Mad, ash content Aad and constant carbon content FCad in the RDF are determined by virtue of thermogravimetric analysis, and then the heat value Q of a to-be-tested refuse-derived fuel sample can be calculated according to an empirical formula Q=-32100Mad+7850V1+19930V2+20750V3+23660FCad+4110.45. An experiment can be completed and needed data can be acquired by utilizing a conventional drying box, a muffle furnace and an analytical balance, so that the heat value of the RDF can be finally calculated. The method is suitable for being used in factories with simple test means.

The invention relates to a device and a method for detecting slow release performance of a concrete slump retaining agent. The device comprises three parts, namely a sample preparation device, a stirring device and a slow release performance testing device, wherein the sample preparation device comprises a plastic or glass container, a liquid transfer suction tube and an analytical balancer or an electronic scale; the stirring device is a stirrer which can uniformly stir cement, coal ash, mineral powder, standard sand, water and a water reducing agent in the specified time; the slow release performance testing device comprises a glass plate, a frustum round die, a tamper, a timer and a plastic or metallic container. The slow release performance of the concrete slump retaining agent is characterized by utilizing the average diameter and the longitudinal value of a flowing part at three moments such as an initial state of the stirred and mixed size, 1 hour and 1.5-2 hours. The method is simple and effective, the neat paste and concrete testing step can be reduced, and the waste of cement-based materials and the environmental influence caused by the discarded materials are reduced in the testing process.