276results about "Indirect flow property measurement" patented technology

Disclosed is a fracture plugging simulation experimental device and an experimental method thereof. The device comprises a simulated wellbore, a simulated formation, a simulated fracture, a plurality of pressure sensors and vales, a mixing barrel, a liquid injection port and a pressurization port, a liquid collection tank, a plugging fluid storage tank, a heating device, etc. The method comprises: loading the simulated formation with the simulated fracture in the simulated wellbore, closing the second valve and turning on the mixing device, injecting a lost circulation material into the mixing barrel, closing the liquid injection port and turning on the heating device and pressurizing, stopping pressurizing and opening the second valve to establish a plugging process, turning on the plunger pump to continue pressurizing, and collecting a fluid pressure change of the simulated fracture in the plugging process; and calculating a pressure-bearing capacity of plugged fracture.

Disclosed is a fracture plugging simulation experimental device and an experimental method thereof. The device comprises a simulated wellbore, a simulated formation, a simulated fracture, a plurality of pressure sensors and vales, a mixing barrel, a liquid injection port and a pressurization port, a liquid collection tank, a plugging fluid storage tank, a heating device, etc. The method comprises: loading the simulated formation with the simulated fracture in the simulated wellbore, closing the second valve and turning on the mixing device, injecting a lost circulation material into the mixing barrel, closing the liquid injection port and turning on the heating device and pressurizing, stopping pressurizing and opening the second valve to establish a plugging process, turning on the plunger pump to continue pressurizing, and collecting a fluid pressure change of the simulated fracture in the plugging process; and calculating a pressure-bearing capacity of plugged fracture.

The invention discloses a system for visually detecting concrete workability on line. The system comprises an image acquisition module for acquiring an image of concrete which is being stirred; the image processing module is used for extracting image features; a machine learning module for outputting workability evaluation based on input image features; the image features comprise texture features, color features and fluidity features; the workability evaluation comprises cohesiveness evaluation, water-retaining property evaluation and fluidity evaluation. According to the visual online concrete workability detection system provided by the invention, efficient, accurate and automatic concrete workability monitoring and control can be realized, historical data management and real-time feedback adjustment are supported, and the problems of low efficiency, poor accuracy and insufficient automation degree of a traditional concrete workability detection method are solved.

The invention belongs to the technical field of pigment dispersity testing, and particularly relates to a painting pigment dispersity testing device which comprises a base, a testing cylinder, a double-cone-shaped dispersing mechanism and an anti-condensation type grinding mechanism, the testing cylinder is arranged on the upper wall of the base, the double-cone-shaped dispersing mechanism is arranged in the testing cylinder, and the anti-condensation type grinding mechanism is arranged in the testing cylinder. The anti-condensation type grinding mechanism is arranged between the upper wall and the bottom wall of the testing cylinder, and the double-cone type dispersing mechanism comprises a centrifugal mechanism, a flow gathering mechanism and a concentration measuring mechanism. The invention provides the device for testing the dispersibility of the pigment for drawing, which can be used for carrying out separation test on the particle pigment and the powder pigment and can be used for grinding the separated particle pigment into powder under the condition of avoiding the agglomeration of the powder pigment.

The invention relates to the technical field of material performance testing, in particular to a neat paste flow testing method and system based on multi-mode dynamic imaging. The test method comprises the following steps: collecting a continuous infrared image sequence of a neat paste free flowing process; synchronously triggering visible light supplement in a flowing initial stage, and obtaining at least one frame of visible light image; performing registration fusion on the visible light image and the infrared image at the corresponding moment to generate an enhanced image frame; extracting a neat paste contour in real time based on the enhanced image frame, and calculating dynamic parameters; according to the change trend of the dynamic parameters, the flowing stability opportunity is adaptively judged; and triggering final contour extraction at a stable opportunity, and calculating static morphological parameters and dynamic process parameters. Through the multi-modal dynamic imaging and intelligent image fusion technology, complex edge contours are accurately extracted, impurity interference is eliminated, and the measurement precision is improved.

The invention discloses a method for testing the thermophysical property of a rare earth aluminate glass melt. The density, the viscosity and the surface tension of the high-temperature melt of La2O3-Al2O3-ZrO2 series glass are tested by adopting a container-free air suspension technology. The method has the remarkable advantages that a small amount of raw materials can be used and rapid heating and cooling can be realized by the container-free air suspension technology, crucible pollution and devitrification are avoided, and the measurement precision is ensured; the temperature control range of laser heating is from 200 DEG C to 3200 DEG C, and the physical property data of the La2O3-Al2O3-ZrO2 glass in a deep supercooling interval can be accurately measured; the doping amount of ZrO2 has obvious influence on the viscosity and the surface tension of the glass, and important reference is provided for component design and process optimization of the high-performance glass of the system; experimental results show that along with the increase of the ZrO2 content, the glass is easy to crystallize in the cooling process, and the physical property data of a low-temperature interval cannot be measured, but the measurable range can be effectively extended by adopting the method disclosed by the invention, and a reliable testing means is provided for the physical property research of the rare earth aluminate glass and the preparation of high-performance glass.

The present application provides a high-voltage cable insulation material continuous extrusion processing characteristic evaluation and optimization method and apparatus. The method comprises: continuously extruding a material under test as a melt, measuring and recording an inlet pressure P. a mass growth rate w, and the diameter D′ of a melt sample strip, and obtaining apparent shear viscosity ηa(t) (step A1); obtaining an outlet expansion rate δ (step A2); recording and displaying curves ηa(t) and δ(t), and treating the time corresponding to an increase of a set percentage on the curves as a cross-linking starting time TX (step A3); selecting a reference sample for testing, and determining a cross-linking reaction starting time TS according to ηa(t) and δ(t) curves of the reference sample (step A4); and defining an index α according to TX and TS.

The invention relates to the field of viscosity detection, and provides a fluorescent probe for detecting the viscosity of mask essence as well as a preparation method and application of the fluorescent probe. 4, 4 '-(iminomethylene) bis (N, N-dimethylaniline) which is slightly soluble in water reacts with acid to form auramine hydrochloride, the water solubility of the auramine hydrochloride fluorescent probe is greatly enhanced, the probe in a water phase is converted into heat (non-radiation decay) due to twisted intramolecular charge transfer and excited state energy caused by benzene ring rotation, and fluorescence quenching is shown; when the viscosity of the solvent is increased, rotation of the benzene ring is blocked, excited state energy cannot be converted into heat and is dissipated in a radiation attenuation mode, fluorescence is enhanced, and viscosity detection of the mask essence with the main component being water is achieved based on the principle. According to the present invention, the method has characteristics of simple synthesis, stable property, no interference of solvent polarity during detection, long-term storage and long-term use, rapid and high-specificity viscosity response ability, and quantitative analysis of viscosity.

The invention discloses a two-component glue mixing and curing degree detection device and method for crystal bar bonding, and belongs to the technical field of glue mixing and curing detection, the two-component glue mixing and curing degree detection device comprises a gluing unit and a detection unit, and the detection unit comprises a mobile platform base, an online detection table, an offline detection table, a micro storage library, a detection main part and a sample box; the gluing unit drips mixed glue into a sample box, the sample box is carried to the offline detection table from the online detection table through the detection main part, and the offline detection table stores the sample box in a miniature storage library; the detection main part comprises a six-axis industrial robot and an image information acquisition assembly, the image information acquisition assembly is connected with a computer, and the computer calculates the mixing degree and curing degree of the glue sample according to the RGB value and contrast information of the glue sample. According to the invention, online and offline dual detection of the mixing degree and the curing degree of the bi-component AB mixed glue is realized, misjudgment and omission of manual detection are avoided, and the detection efficiency and accuracy are improved.

The invention discloses a high-temperature melt viscosity testing device and method, and the testing device comprises a testing box; a visual assembly is arranged on one side of the test box; an adjusting mechanism, wherein the test box and the visual assembly are arranged above the adjusting mechanism; collecting the change state of the material in the test box through the visual component, and calculating the viscosity of the material; image data of materials in the testing box can be monitored in real time through the visual assembly, the viscosity of the materials is calculated according to the change of size data, the testing box can control the temperature and atmosphere, the high-temperature melt viscosity in different testing environments can be conveniently adjusted, testing is easy and convenient, the sample preparation size is small, and the testing time is short.

A computer implemented method for measuring the viscosity of a fluid stream flowing from an opening with constant acceleration, wherein the method takes as input at least one image of an area of interest of a fluid stream, the section, s0, of the opening and the output volume flow rate, U0, of the fluid stream from said opening; wherein the method provides as output the viscosity, η, of the fluid; wherein the method includes (a) modelling the geometrical profile of the fluid stream trough an digital processing operation of the input image, and (b) computing the viscosity of the fluid with a mathematical or physical model from the modelled geometrical profile, the section, s0, and the output volume flow rate, U0.

A method and a device for performing microrheological measurements in a viscoelastic medium by employing at least two optical traps, generated from a single laser source, acting on a single particle located in said medium. The method uses an improved back-focal-plane interferometry (BFPI) procedure to obtain the complex shear modulus of the medium.

A method and a microscope determine flow properties in a sample chamber through which a medium flows. The method includes detecting detection radiation from a confocal volume generated in the sample chamber with a plurality of detector elements of a detector in the form of a detector array at a plurality of points in time. The detector is arranged in a plane conjugate to the rear-side image plane of an objective. The measurement values from the detector elements can be analyzed individually. Cross correlations of the acquired measurement values from the detector elements of at least one pair are generated in two directions and analyzed. The confocal volume is generated at at least two mutually different locations of the sample chamber. At each location, a speed and optionally a movement direction of the medium are determined to create a flow profile over at least one region of the sample chamber.

The present application provides a high-voltage cable insulation material continuous extrusion processing characteristic evaluation and optimization method and apparatus. The method comprises: continuously extruding a material under test as a melt, measuring and recording an inlet pressure P, a mass growth rate w, and the diameter D' of a melt sample strip, and obtaining apparent shear viscosity ηa(t) (step A1); obtaining an outlet expansion rate δ (step A2); recording and displaying curves ηa(t) and δ(t), and treating the time corresponding to an increase of a set percentage on the curves as a cross-linking starting time TX (step A3); selecting a reference sample for testing, and determining a cross-linking reaction starting time Ts according to ηa(t) and δ(t) curves of the reference sample (step A4); and defining an index α according to Tx and Ts.

A method for calculating the bedload sediment transport rate by correcting the friction coefficient in the bed sediment movement is provided, including the following steps: S1, creating a calculation formula of a friction coefficient; S2, determining a calculation bedload sediment transport rate formula per unit width; S3, transforming the calculation formula of the bedload sediment transport rate per unit width into a dimensionless form; and S4, substituting the calculation formula of the bedload sediment transport rate per unit width obtained in the S2 into the S3 to obtain a bedload sediment transport rate formula with a corrected friction coefficient.

According to embodiments of the present invention, an optical sensor is provided. The optical sensor includes a single piece of optical fiber including a modified fiber tip and a distal end opposite to the modified fiber tip. The distal end may be configured to optically communicate with an external light source and an external detector. The modified fiber tip may be configured to be positioned within a turbid medium to deliver light from the external light source to particles in the turbid medium, at least minimize the light being back reflected at the modified fiber tip and receive backscattered light from the particles for determining a real-time fluid property of the particles in the turbid medium by the external detector. According to further embodiments of the present invention, an optical apparatus, an optical arrangement, and a method for determining a real-time fluid property of the particles are also provided.

The invention relates to a photoacoustic liquid viscosity detection device and method based on spectrum resolution, and belongs to the field of photoacoustic detection and liquid physical property analysis. The device comprises a solid-state laser, a collimating lens, a plane mirror, a plate-type semitransparent mirror, a microscope objective lens, a photodiode, a photoacoustic coupling cavity, a rectangular prism group, an ultrasonic transducer, a pre-signal amplifier, a digital oscilloscope and a computer. Pulse laser is focused to a liquid sample after being processed by an optical path to excite a photoacoustic effect, an ultrasonic transducer receives a signal and converts the signal into an electric signal, after a digital oscilloscope synchronously samples, a computer extracts a frequency spectrum full width at half maximum (FWHM) through fast Fourier transform, and non-contact detection is realized based on a negative correlation between the frequency spectrum full width at half maximum and viscosity. The method can overcome the defects of large sample size, mechanical contact and the like of a traditional method, and is suitable for high-precision viscosity detection of biological tissues and industrial samples in the field of biomedicine.

Nozzle Optical Manifold (NOM) includes a tube, which includes an optical beam transmitted down the center of the tube. Simultaneously, NOM measures, with a fiber optic film thickness measurement beam, at the center of the tube. Tube has a gas jet emitted from a nozzle that impinges on the surface of the substrate that has a thin film. The thickness of the thin film is reduced in thickness as the gas jet impinges thereon. It should be appreciated that, depending on the embodiment, any fluid that impinges on the surface of the thin film may be used.

The application discloses a solid rocket engine lining curing detection method based on a fiber Bragg grating, and comprises the following steps: S1, preparing a lining slurry according to process requirements, spraying or coating the lining slurry on an adiabatic surface according to engine technical index requirements, and feeding into a constant-temperature rotary curing furnace for constant-temperature rotary curing; S2, feeding a detection device into the engine, and placing the detection device on the lining surface; S3, acquiring grating sensor signal changes in a detection process by using a fiber detection system, and judging the lining curing state according to detection data and a data processing algorithm. The application has the advantages of small size, high precision, low cost and intrinsic safety, can effectively detect the physical characteristics such as strain, temperature and pressure of the structure, overcomes the defects such as large occupation area and high price of ultrasonic and infrared ray methods and equipment, and realizes in-situ and nondestructive detection of the lining curing state.

A viscometer for measuring viscosity of a fluid uses one or more ultrasound transducers to conduct an ultrasound-based time-of-flight measurement process in which an ultrasound pulse is transmitted into the fluid at a first time and received by a transducer at a second time. A viscometer has at least one transducer receptacle configured for being immersed in the fluid. The at least one transducer receptacle receives one or more ultrasound transducers and fluidly isolates the transducer(s) from the fluid. The viscometer enclosure is shaped and arranged so that, when the ultrasound-based time-of-flight measurement process is conducted, the ultrasound pulse travels a predefined distance through the fluid from where the ultrasound pulse is transmitted to where the ultrasound pulse is received, whereby a time of flight of the ultrasound pulse from when the ultrasound pulse is transmitted to when the ultrasound pulse is received indicates the viscosity of the fluid.

The present invention is directed to a method to detect in a blood sample whether the red blood cells (RBCs) contained in said blood sample present or not an alteration of their deformability by using molecular rotor (MR) able to penetrate RBCs cell membrane. The invention also relates to diagnostic methods of RBC related pathologies associated to the modification of the distribution of the viscosity, rigidity or deformability of RBCs by detection and measurement of the RBCs fluorescence intensity image intensity implementing optical methods. Finally, the present invention is directed to the use of MRs for testing the deformability of red blood cells (RBCs) in a blood sample and kit comprising MR and red blood cells (RBCs) control.

The invention discloses a high-viscosity material experimental molding and rheological parameter measurement method considering both a supergravity environment and a constant gravity environment. Comprising the following steps: firstly, placing a high-viscosity material in a closed space provided with a sonar sensor, and enabling the closed space to be in a constant-gravity or supergravity environment; pressurizing the closed space to a preset high air pressure for a period of time, then releasing the pressure to a preset low air pressure for a period of time, repeating pressurizing and pressure releasing for preset times, and collecting the volumetric strain of the high-viscosity material at any preset high air pressure or preset low air pressure through a sonar sensor in the repeating process; and after the operation is repeated for preset times, bubbles in the high-viscosity material reach the preset discharge efficiency, and in-situ leveling and molding of the high-viscosity material are completed. The device and the method have the beneficial effects that the material bubbles of the high-viscosity material are efficiently discharged and the rheological parameters of the high-viscosity material are measured in a constant-gravity and supergravity experimental environment.

The invention discloses a method for measuring the flow velocity of molten metal, which comprises the following steps of: checking various devices during preparation before measurement, preheating, self-checking, adjusting parameters and installing a high-temperature-resistant protection structure; multi-technology measurement including laser Doppler measurement, infrared thermal imaging measurement, sound wave assisted multi-dimensional flow velocity measurement, quantum sensing high-precision measurement and multi-spectral imaging flow characteristic analysis is adopted, and in the data processing and analysis stage, a data processing unit receives all information and calculates and corrects the flow velocity through multiple algorithms. A virtual simulation construction model based on digital twinning simulates an actual state and performs simulation verification, and data or an algorithm is adjusted to ensure accuracy. And finally displaying and recording a result. According to the method, multiple technologies are combined and complemented with one another, the accuracy is improved through multi-algorithm correction, a digital twinning verification result is obtained, a non-contact measurement mode is adopted, the method adapts to a high-temperature environment, and the measurement precision, reliability and applicability are improved.

Embodiments of the present disclosure generally relate to apparatus and methods for foam generation, and to apparatus and methods for evaluation of foam systems. In an embodiment, a method of analyzing foam properties includes delivering a foaming composition and a gas to a housing at a pressure of 500 psi to 6,000 psi and a temperature of 35° C. to 150° C., the housing containing an unconsolidated porous media. The method further includes flowing the foaming composition and the gas through the housing, and forming a foam by an interaction of the foaming composition, the gas, and the unconsolidated porous media. The method further includes directing the foam from the housing to a visualization chamber, the visualization chamber in fluid communication with the housing, and measuring a foam characteristic via the visualization chamber. The characteristic may include foam half-life, pressure drop through the unconsolidated media, and / or apparent viscosity of the foam.

A liquid viscosity detection device, the adjustable horizontal base platform of the present invention is fixedly installed with an LED backlight source, a bubble generating device, a solution collecting tank, a bracket, and a CCD high-speed camera from left to right in sequence, and a normal pressure liquid supply device is installed on the bracket; a solution collecting tank is fixedly installed on the platform below the normal pressure liquid supply device; a controller is installed above the CCD high-speed camera, and the normal pressure liquid supply device and the bubble generating tank are connected to the controller through a communication cable; a host PC is installed on the side of the entire device, and the CCD high-speed camera and the controller are connected to it through a communication cable. The detection device is controlled to perform video acquisition of the droplets of the solution to be tested and the bubble generation process in the solution, and the characteristic data of the solution to be tested is obtained through video image processing and feature extraction. The soft measurement method is used to identify the viscosity of the liquid to be tested, thereby improving the accuracy and real-time performance of online viscosity detection in industrial scenarios.

Apparatus for determining the flowability of a metal powder for use in an additive manufacturing process, comprises; an illumination device 41 to illuminate the powder 33 with electromagnetic radiation 43; an image capture device 42 arranged to detect radiation reflected back from the powder and capture multiple sequential images of the reflected radiation; and an image analysis device configured to compare sequential images to determine differences between the images and compute the rate of movement of particles of the metal powder. Flow speed of the powder can be calculated.

A method of measuring a material property of a viscoelastic fluid using one or more vibration transducers, the method comprising: vibrating the one or more vibration transducers in the viscoelastic fluid, the first surface and the second surface are spaced apart and oriented relative to each other such that during vibration of the one or more vibration transducers, the first wave and the second wave combine with each other to generate a first wave propagating from a first surface of the one or more vibration transducers and a second wave propagating from a second surface of the one or more vibration transducers, where the first surface and the second surface are spaced apart and oriented relative to each other such that during vibration of the one or more vibration transducers, the first wave and the second wave combine with each other. To provide net constructive interference or net destructive interference; and determining a material characteristic of the viscoelastic fluid based on the vibration of the one or more vibration transducers in the viscoelastic fluid.

The present disclosure describes a computer-implemented method, system, and computer program product for determining the intrinsic viscosity and Huggins constant of an unknown sample. In one embodiment, the method, system, and computer program product includes receiving specific viscosity values ​​over time from a viscometer corresponding to a series of aliquots of an unknown sample injected into an instrument chain, the instrument chain including the viscometer, calculating a total mass of each of the aliquots, calculating a first intermediate viscosity value for each of the aliquots, calculating a second intermediate viscosity value for each of the aliquots, and fitting the total mass, the first intermediate viscosity value, and the second intermediate viscosity value to a fitting to yield a calculated intrinsic viscosity of the unknown sample and a calculated Huggins constant of the unknown sample.

The invention discloses a solid rocket engine lining curing detection method based on a fiber Bragg grating, which comprises the following steps: S1, preparing lining slurry according to process requirements, spraying or blade-coating the lining slurry on a heat insulation surface according to engine technical index requirements, and feeding into a curing oven for constant-temperature rotary curing; s2, a detection device is sent into the engine, and the detection device is placed on the surface of the lining layer; and S3, acquiring the signal change of the grating sensor in the detection process by utilizing an optical fiber detection system, and judging the curing state of the lining according to detection data and a data processing algorithm. Based on the advantages of small size, high precision, low cost, intrinsic safety and the like of the fiber bragg grating, physical characteristics such as strain, temperature, pressure and the like of the structure can be effectively detected, the defects of large occupied area, high price and the like of ultrasonic, infrared ray and other methods and equipment are overcome, and in-situ and nondestructive detection of the curing state of the lining is realized.

According to embodiments of the present invention, an optical sensor is provided. The optical sensor includes a single piece of optical fiber including a modified fiber tip and a distal end opposite to the modified fiber tip. The distal end may be configured to optically communicate with an external light source and an external detector. The modified fiber tip may be configured to be positioned within a turbid medium to deliver light from the external light source to particles in the turbid medium, at least minimize the light being back reflected at the modified fiber tip and receive backscattered light from the particles for determining a real-time fluid property of the particles in the turbid medium by the external detector. According to further embodiments of the present invention, an optical apparatus, an optical arrangement, and a method for determining a real-time fluid property of the particles are also provided.