150results about "Material analysis by measuring buoyant forces" patented technology

Water-resistant preformed resilient bags are applied to a porous material specimen having a coarse external surface to provide for more consistent measurement results in water displacement tests. The preformed bag is configured to collapse and substantially conform to the material specimen's external surface and to provide planar collapsed portions extending away from the specimen. The preformed bags are precision manufactured and each applied to a respective specimen in a manner in which the bag consistently displaces the same volume of water when used in water displacement tests over many specimens. The volume of the bag can be accounted for when obtaining the volume of the specimen. The method of sealing the specimen includes inserting the specimen into a preformed bag and collapsing and sealing the bag such that is conformal to the external surface of the specimen. The method can provide a preferred operating vacuum pressure corresponding to the specimen type (such as porosity or coarseness) which can automatically direct the operational parameters of the bag sealing operation. The system includes a preformed bag configured to receive a material specimen therein, a vacuum apparatus for removing the air from the bag, and a sealing means for sealing the bag. In one embodiment the vacuum apparatus includes an integrated scale for measuring various weights associated with the specimen for liquid density determinations.

The invention provides an energy-saving type closed circuit system and a control method for a mill swirler. The energy-saving type closed circuit system comprises a feeder, a conveyor, an ore miller and the swirler. The invention is characterized in that: a weighing type pulp multi-parameter online detection integration device is arranged on the overflow and desilting pipeline of the swirler. The energy-saving type closed circuit system and the control method for the mill swirler provide a better solution for the problem of the online detection of key parameters such as flow rate, density, grain size, grade, etc. with high detection accuracy and good reliability. The energy-saving type closed circuit system and the control method for the mill swirler can further make use of the detected accurate parameters to determine data such as the feeding amount of the miller, the circulating load of the miller, the grinding concentration of the miller, the pulp density in a pump bath, the sand return ratio, etc., thereby completely reaching the aims of maximally improving the processing capacity of a miller table, saving energy and reducing consumption with the precondition of ensuring the qualified overflow grain size (pulp product) of the swirler through the data matched with the control device and the operation module in the prior art.

The invention discloses carbon doped nano tube aerogel and a preparation method and an application of the carbon doped nano tube aerogel. The method comprises the following steps: (1) mixing aqueous dispersion liquid of a carbon oxide nano tube with accelerants for hydrothermal reaction to obtain the carbon nano tube hydrogel; and (2) drying the carbon nano tube hydrogel obtained in the step (1) to obtain the carbon doped nano tube aerogel, and carbonizing to obtain the carbon doped nano tube aerogel. The testing results show that the aerogel has high specific surface area and high conductivity, has strong adsorption capacity to dyes and organic solvents, and has excellent catalytic performance to the oxygen reduction reaction, can be widely applied to various energy and environment fields, such as a fuel-cell catalyst, a supercapacitor and organic pollutant disposal.

The invention discloses a device for evaluating longer-term snow-melting property of a salinization matter for automatically melting the snows on the road surface and relates to the technique of road surface tests. The device comprises a constant temperature water bath box and a soaking unit and a testing unit which are arranged in the constant temperature water bath box, wherein the soaking unitcomprises a test bracket; a test piece is arranged in the test bracket; the testing unit comprises a temperature measuring device and a density measuring device; and the soaking unit and the testing unit are mutually communicated and are together placed in a closed container. The device provided by the invention can be applied to a test for simulating the longer-term snow-melting effect of the salinization matter for automatically melting the snows on the road surface and can be used for evaluating the longer-term snow-melting property of the salinization matter for automatically melting the snows on the road surface.

The invention determines density of a sample while the sample is immersed in a gaseous medium having variable density. The apparatus includes a chamber for containing the gaseous medium and the sample, means for selectively varying the density of the gaseous medium over a range of densities, and means for producing electrical signals related to the density of the gaseous medium. In the chamber is a balance beam having a sample pan at a first end and a coil assembly at an opposing second end. Also at the second end of the beam is a first counter-weight having a volume and mass which is substantially equivalent to the volume and mass of sample pan, and which creates a moment that is substantially equivalent to the moment created by the sample pan. At the first end of the beam is a second counter-weight having a volume and mass which is substantially equivalent to the volume and mass of the coil assembly, and which creates a moment which is substantially equivalent to the moment created by the coil assembly. A magnet assembly is disposed adjacent to and magnetically interacts with the coil assembly. A controller provides a coil current to the coil assembly, thereby generating a magnetic field which interacts with the magnet assembly. According to the invention, the interaction between the magnetic field of the coil assembly and the magnet assembly applies a force to the second end of the beam to keep the beam balanced as the density of the gaseous medium in the chamber is varied over the range of densities. A computing device receives the electrical signals related to the density of the gaseous medium and the electrical signal related to the coil current, and calculates the density of the sample based thereon.

This invention relates to one ceramics volume intensity electron measurement device and method, wherein the device comprises electron balance, water contain cup, thin copper wire and hanging barrel, wherein, the electron balance disc is put with cup and has one rack with its base socket to distribute loads onto load bench; thin copper wire top end is fixed onto rack and its down end has handing barrel in cup water; in measuring, setting the electron balance as zero and to rest ceramics quality m0 and then boiling it for two hours for natural cooling off; sweeping off water in the barrel to read balance display values to compute ceramics volume intensity.

An underwater weighing container for measuring specific gravity, requiring relatively a small amount of reference liquids for measurement and offering wide space for mounting specimens to be measured are provided. The underwater weighing container includes a tubular body and a circular bottom plate. The tubular body has openings on both ends One end has an introvert circular rim formed thereon and the other end has a plurality of stoppers attached to the internal surface thereof. The circular bottom plate has a mesh or a porous structure and is inserted between the circular rim and the stoppers. The underwater weighing container is immersed in a reference liquid, and a solid specimen is placed on or inserted underneath the bottom plate. The underwater weighing container is hung by means of a hanging member 13 to measure the weight of the solid specimen and determine the specific gravity.

The invention relates to a measurement method for the density of a solid material, which is mainly applied to experiment teaching of universities and technical secondary schools. The method comprises the following steps of: measuring the mass m3 of a solid material sample to be detected by an electronic scale; placing a container containing water with the density of Rho0 on the electronic scale, and immersing a special sample container into the water, wherein the special sample container does not contact the container for containing the water, and the reading of the electronic scale is m2; placing the solid material sample to be detected into the special sample container and immersing the sample and the sample container into the water, wherein the sample does not contact the sample container, and the reading of the electronic scale at the moment is m4; and solving the density of the sample to be detected. The method disclosed by the invention is simple, convenient, rapid and high in measurement precision and is applicable to solid material samples with different densities and different shapes.

The invention relates to a buoyancy method for rapidly measuring grain moisture and a tester thereof. The measuring method is realized by five steps of dish box liquid injection and suppressing tare weighing, sample preparation, sample weighing, liquid injection and suppressing gross weight weighing and result calculation. The tester comprises an electronic balance, a liquid injection and suppressing device, a data processing display device, a water groove and a dish box. By adopting the grain moisture measuring method and the special tester thereof, the invention utilizes the principle of Archimedes buoyancy law, overcomes the disadvantages of long operation time of a drying method, untimely guidance and slightly great error of other rapid moisture testers, has both the accuracy of the drying method and the characteristic of rapid measurement of various moisture testers, has wide moisture measuring range and multiple measuring varieties, is not influenced by factors such as grains, temperature, and the like, and is widely suitable for grain storage business and the field of grain processing.

The invention relates to an automatic liquid concentration detection method and device. The device is simple in structure, simple to maintain, high in adaptability, low in working environment requirement, high in precision and accuracy and applicable to automatic detection of concentration of various solutions. The device comprises a single-chip microcomputer, a camera, a buoyance gauge, a temperature sensor, a solenoid valve, a sampling pump, measuring software and an LCD (liquid crystal display), wherein the single-chip microcomputer is connected with the camera, the temperature sensor, the LCD and the solenoid valve; the camera is connected with the single-chip microcomputer and used for acquiring an image signal of the buoyance gauge; the temperature sensor is connected with an input end of the single-chip microcomputer and used for detecting the temperature of a liquid in real time; the solenoid valve is connected with the single-chip microcomputer and used for switching the to-be-detected liquid or clear water for washing; the sampling pump is connected with the single-chip microcomputer and used for pumping the liquid into a sample tank. The single-chip microcomputer and the camera acquire an image of the buoyance gauge, concentration information of the liquid is acquired through calculation of the position of the buoyance gauge in the image, meanwhile, the temperature of the liquid is acquired, temperature correction is performed on the concentration, and the result is displayed by the LCD. Automatic measurement and online detection are realized.

The invention discloses a device for measuring the material level and the concentration in a thickener. The device includes an execution mechanism, a detection mechanism, and a processing and displaymechanism. The execution mechanism includes a heavy hammer, a winding wheel, a pulley and a servo motor. The detection mechanism includes a lever, a pressure sensor and a coder, and the processing anddisplaying mechanism includes a PLC and a displayer; the heavy hammer is connected to one end of a rope, the other end of the rope is wound on the winding wheel after bypassing the pulley, the winding wheel is in transmission connection with the servo motor, and the winding wheel is driven by the servo motor to rotate; the pulley is connected with one end of the lever, the pressure sensor is connected with the other end of the lever, the coder is arranged at the winding wheel and used for recording number of turns of rotation of the winding wheel, the pressure sensor and the coder are connected with the PLC, and the PLC is connected with the displayer. The device can measure the material level and the material concentration of a deposit layer in the paste thickener at the same time, the structural design is reasonable and the measuring cost is low.

The present invention provides a device and a method for measuring liquid concentration in dynamic / static state. The device comprises a sensor and is characterized in that the sensor is connected with a gravity float arranged in liquid through a lifting rope or a lifting rope and a connecting piece. A measurement device simply consisting of the gravity float, the lifting rope and the sensor is used; the buoyancy variation amount of the gravity float in the liquid with different concentration is converted into electric quantity change signals through the sensor, and then the liquid concentration in flowing or static state can be measured. The device is simple in structure, wide in application scope, accurate in measurement, high in reliability and capable of providing high-reliability concentration control parameters for liquid products, so as to guarantee product quality, reduce cost and improve work efficiency.

The invention discloses a rapid detection method for noble metal. The rapid detection method comprises the following steps of: 1) weighing the mass of a sample to be detected by a precision balance and vacuumizing the sample to be detected; 2) immersing the sample to be detected in distilled water and weighing the mass of the immersed sample by using the precision balance; 3) calculating the actual density of the sample to be detected; 4) detecting the content of the noble metal and impurity elements in the sample to be detected by utilizing an X fluorescence spectrograph and calculating the theoretical density of the sample to be detected; and 5) calculating an error between the actual density and the theoretical density of the sample to be detected, wherein if the error is in a range of 0.5%, testing data of the sample to be detected is accurate. The method disclosed by the invention can detect a plurality of samples to be detected at the same time and can analyze the reliability of detection results of the plurality of samples to be detected from a plurality of angles, so that a final detection conclusion is obtained and the accuracy of detection data is guaranteed; and the data can be rapidly obtained and an effective manner is provided for the development of the mass detection work.

A specific gravity measuring device, which can reliably and quickly obtain the specific gravity of various solid substances through one measurement operation very simply. The specific gravity measuring device includes: a liquid tank; a first measuring part supporting the liquid tank; a measured object receiver, which is set in the liquid tank and immersed in the liquid; a second measuring part , the second part of the measuring part supports the measured object receiver in a non-contact manner relative to the liquid tank; an arithmetic operation unit is used to calculate the specific gravity value according to the measured values ​​of the first and second measuring parts; and A display device is used to display the specific gravity value obtained by the arithmetic operation unit. The first measuring part measures the increase in weight as the measured object is immersed in the liquid as a buoyant force, and the second measuring part measures the weight of the measured object in water. The arithmetic operation unit finds specific gravity from the measured buoyancy and weight in water to display them on the display device.

The invention relates to a liquid density measurement device and a measurement method. A floater, a lever, a fulcrum bracing wire and a force-measuring bracing wire are arranged in a container, and the floater is connected on one end of the lever. One end of the fulcrum bracing wire is fixedly connected with a lever fulcrum, and the other end is fixed on a fixed point in the container under the lever. One end of the force-measuring bracing wire is fixedly connected with the force-measuring end of a force value sensor, and the other end is fixedly connected with the lever. The electric signal of the force value sensor is amplified, filtrated and converted by A / D and then is processed by a single chip, and the measurement result is showed on a display. The liquid density measurement device has the advantages of simple structure and accurate measurement, and is suitable for dynamic or static automatic measurement of liquid density.

The invention discloses a portable density testing device with the high precision, belonging to the field of instruments and meters. A conventional density testing instrument has poor testing precision. The portable density testing device with the high precision comprises a measuring container and an auxiliary container with adjustable height, wherein the auxiliary container is communicated with the measuring container; the measuring container is placed on a weighing sensor connected with a digital display operating device; the digital display operating device comprises a data processing module, an input module, a registering module and a display module, and the input module, the registering module and the display module are connected with the data processing module. The portable density testing device with the high precision has the advantages of simple and convenient operation, easy implementation of digital display, high measuring speed and high measuring accuracy without manually calculating the density testing. The testing device is simple to construct, and easy to detach and carry with low manufacturing cost. The instrument can be applied to fields of chemical industry, mineral separation, substance evaluation and the like, and can be widely applied to precious stone evaluation, low-grade noble metal ore detection, die casting pore detection and the like requiring extremely high precision.

The invention discloses a liquid buoyancy weighing method for determination of aluminum and iron content in steel grit aluminum. The method comprises the following steps: (1) preparing a steel grit aluminum sample, then fully drying and accurately weighing a weight m1 of the sample; (2) placing the weighed sample in an immersion liquid groove, then placing the immersion liquid groove in a vacuumizing device; vacuumizing till an internal pressure in the vacuumizing device no more than 2500Pa and maintaining for 5-10min; (3) slowly injecting water into the immersion liquid groove until the immersion liquid covering the sample, and maintaining pressure in the vacuumizing no more than 2500Pa for 5-10min; (4) removing the immersion liquid groove from the vacuumizing device, standing the immersion liquid groove in the air to completely infiltrate and saturate the sample; and then weighing a suspended weight of the sample; (5) calculating density of the sample; and (6) calculating aluminum content and iron content in the sample. The method for the determination of aluminum and iron content in the steel grit aluminum can effectively avoid influences from the structure and shape of the steel grit aluminum, so as to significantly improve accuracy and reliability of analysis data, and realize good reproducibility.

The invention relates to an electronic liquid densimeter which is characterized in that a density display instrument is connected with a weighing sensor arranged in a balance box by a cable; the weighing sensor is fixed in the balance box; the balance box can be maintained in a horizontal state when the density display instrument is positioned at any angle under the self weight and the vertical acting force of a measuring probe, so that the error of data measurement caused by the change of the level angle of the weighing sensor can be avoided; the measuring probe is connected with the weighing sensor by a measurement thread; the density display instrument can be used for calculating and displaying the liquid density according to the buoyancy and the volume of the measuring probe immersed in the liquid. The electronic liquid densimeter has the characteristics of being simple in structure, small in volume, low in cost, convenient to carry, high in measurement accuracy, etc.

The invention discloses a device for analyzing the interface of a double-float ball red mud setting tank, comprising: a setting tank, a hoisting mechanism and a cable length measuring device. Two sets of pulley sets (1) with measuring scale racks controlled by a PLC control system are arranged on the setting tank (3); the hoisting mechanism and the cable length measuring device (2) are respectively connected with a large float ball (4) and a small float ball (5) in the setting tank (3) through the cables; the large float ball (4) and the small float ball (5) have different volume and identical density; the shells of the large float ball (4) and the small float ball (5) are made of stainless steel with lead sands filled therein; and the cables connected with the float balls are made of a material with high temperature resistance (greater than 100 DEG C), alkali / acid corrosion resistance and small ductility. The invention solves the problem that the sensitivity of the measuring detector is directly influenced as the measuring detector is easy to have scars in the prior art; the device has the advantages of reliable measurement, investment conservation and low cost; and the maintenance time and the labor intensity are reduced.

The invention discloses a method and an apparatus for rapid measuring of density. The apparatus comprises a glass wind cap (1), a weighing tray handle (2), a weighing tray (3), a pressing down head (5),a screw (13), a nut (4), an object to be weighed (6), a measuring liquid medium (7), a support cylinder (a support frame) (8) for the weighing tray, a container (9) for holding the liquid medium, aweighing pedestal (10), a support (a bearer) ( 11) for the container holding the liquid medium, a mainframe (14), a weighing sensor (12), a support column (17), a lower hook (15), a lifting rope (16), a suspending weighing tray (20) for measuring, a liquid medium (21) for measuring, a container (18) for holding the liquid medium, etc. Compared to the prior art, the invention has the following advantages: measuring results are accurate and can be obtained rapidly; considerable manpower and material resources are saved; the method can be used for on-line rapid detection and has critical significance to improve and control product quality.

The invention relates to the field of density measurement devices and discloses a foldable suite device for measuring the density of an electronic balance. The foldable suite device comprises a supporting tray, a supporting frame, a sample putting mechanism and / or a buoyancy mechanism, wherein the supporting tray can be arranged on a balance seat of the electronic balance; the supporting frame isin an axial symmetry structure, is connected to the supporting tray and is arranged to be folded or unfolded along a folding line parallel to the supporting tray; in an unfolding state, the gravity center of the supporting frame and a weighing center of the electronic balance are both positioned on a symmetrical center line of the supporting frame; the sample putting mechanism and / or the buoyancymechanism can be arranged on the supporting frame and extends towards the bottom end of the supporting frame along the symmetrical center line of the supporting frame. The foldable suite device disclosed by the invention has the advantages that the space is saved and convenience in carrying is realized; the gravity center of a weighed heavy object can be controlled within a smaller radius area with the weighing center of the electronic balance as a round point, so that a measurement result of the electronic balance is more accurate.

The invention relates to a float type optical fiber Bragg grating density sensor of a Pb-Sn (plumbum-stannum) molten alloy, belonging to the technical field of photoelectric measurement. The lower half part of the sensor is arranged inside the Pb-Sn molten alloy; a buoyancy force transmission rod is pulled as a tapered float into which lead is filled is subjected to the action of a buoyancy force and the gravity; the right end of a constant-strength cantilever fixed on a protecting cylinder is subjected to an upward pulling force through a steel bar equal armed lever and a connecting rod, so that the constant-strength cantilever has a deflection deformation, and furthermore the displacement of a central refection wavelength of an optical fiber Bragg grating adhered to the upper and lower surfaces of the cantilever is generated; a temperature measuring grating adhered to the inner wall of a connecting rod sleeve is used for measuring the temperature of the molten alloy; and the density of the molten alloy under the temperature is calculated according to a linear relationship between the buoyancy force to the float and the density of the molten alloy. As the sensor is arranged into the molten alloy for on-line monitoring, the noise interference caused by the on-site environment is reduced, and moreover the constant-strength cantilever is adopted as the wavelength turning mode, the sensor is strong in interference assistance, high in instantaneity and good in linearity.

The invention discloses an on-line liquid viscosity and density detection probe. The on-line liquid viscosity and density detection probe is characterized by comprising a coil framework, wherein an upper end cover and a lower end cover are respectively arranged at the two ends of the coil framework; a cavity defined by the upper end cover and the lower end cover of the coil framework serves as a measurement room; the upper end of the measurement room is opened to serve as a liquid flow inlet; the lower end of the measurement room is sealed by a lead seat; a movement floater made of a magnetic conducting material is arranged in the measurement room; an ultrasonic sensor is mounted on the lead seat at the lower end of the measurement room; coils are wound on the outer wall of the coil framework. The on-line liquid viscosity and density detection probe is simple in structure and convenient to mount, solves the problems existing in on-line liquid viscosity and density measurement, can achieve an automatic cleaning function, is durable, can be added with a temperature sensor to prevent measurement from being influenced by temperature and is high in measuring accuracy.

The invention discloses a liquid density real-time measurement method, which can be used for accurately and rapidly measuring the density of various liquids and carrying out remote real-time measurement and transmission. The liquid density real-time measurement method comprises the following steps of: 1, preparing a solid which is insoluble in a liquid to be measured and has the density larger than that of the liquid to be measured; 2, tying the solid by one end of a thin wire, fixing the other end of the thin wire on a force sensor, and immersing the solid into the liquid with rho 0 as the known density without contacting a vessel used for containing the liquid; 3, amplifying an electric signal output by the force sensor by virtue of an amplifier, carrying out reading by virtue of a secondary meter or directly carrying out A / D conversion on the electric signal, collecting and displaying data by a microcomputer, and regulating the amplification factor of the amplifier to enable the meter to directly display the rho 0 value as the known density; and 4, immersing the solid into the liquid to be measured without contacting the vessel used for containing the liquid, so that the meter directly displays a rho x value as the density of the liquid to be measured.

The invention relates to a device for detecting density of powder alloy pressed blank products, and in particular provides a device for detecting the density of aluminum-nickel-cobalt permanent magnet alloy pressed blanks. The device comprises at least two drum bodies, wherein drum covers are arranged above the drum bodies; clamping strips are arranged above the drum covers and are provided with locking bolts; a sample stage is arranged in each drum body; the drum bodies are communicated through a bottom communicating pipe; the communicating pipe is provided with a communicating valve; and a vacuum stop valve and a deflation valve are arranged above the drum bodies respectively. Compared with the prior art, the device has the characteristics of reasonable design, simple structure, accurate testing process, easy operation, low implementation cost, and the like.

The invention discloses a soil density measurement method and a special wax-sealed paper box thereof. The soil density measurement method comprises the following steps: 1) measuring volume density of A4 copy paper for making the special paper box; 2) making a planar unfolded pattern of the special paper box; 3) heating for melting solid paraffin; 4) covering a paraffin film on the planar unfoldedpattern of the special paper box; 5) measuring weight of the special wax-sealed paper box fully containing soil samples in the air; 6) measuring the weight of the special wax-sealed paper box fully loaded with the soil samples in water; 7) comparing correctness of measured data; 8) performing parallel determination twice; and 9) calculating the density of the soil samples to be measured. The special wax-sealed paper box is a cuboid which is in volume of 30 cm<3> to 40 cm<3> and manufactured by the A4 copy paper, the differences among values of length, width and height of the special wax-sealed paper box are less than or equal to 5cm, the height value is larger than the length value and the width value respectively and the paraffin film in the thickness of 0.4-0.7mm is covered inside and outside the special wax-sealed paper box.

The present invention relates to one kind of automatic equipment for measuring the bulk density of raw ceramic tile, and the equipment has simple structure and can detect the density distribution of raw ceramic tile quickly. The equipment includes one feeder for loading ceramic tile sample, one balance for measuring the sample weight, one first conveying mechanism to convey the sample onto the balance, one second conveying mechanism to convey the sample into one mercury container on the balance, one circuit connected to the balance, one display screen and / or one printer, and software of equipment operation and density value calculation.

The invention relates to a method for determining the bulk density of a field core sample from an asphalt pavement. The method comprises the following steps of: sampling the core sample from the pavement with a drill bit, weighing a dried core part to obtain weight m1, dropping paraffin into a visible small hole in the surface of the core part by a dropper, leveling the surface of the core part with a scraper, and then weighing the core part and the filled paraffin to obtain total weight m2; sealing the weighed core part with wax, weighing the wax-sealed core part to obtain weight m3, and finally, weighing the wax-sealed core part in water to obtain weight m4; and calculating the density Gb of the filed core part, wherein s=m1 / V=m1 / (m3-m4-(m3-m2) / Gp). By adopting the method, the problems in traditional testing methods can be effectively solved, and the bulk density of the field core sample is accurately determined.