A system and method for measuring one or more viscoelastic properties of a material under measurement is disclosed. The system includes an emitter-observer transducer pair separated by the material. A signal processing assembly is operable to (i) apply a plurality of excitation signals to the emitter transducer, wherein each of the excitation signals comprises a continuous-wave sinusoidal waveform, (ii) record a plurality of output signals at the observer transducer, wherein each of the output signals corresponds to one of the excitation signals, (iii) analyze the output signals to measure the sound speed of the material, and (iv) determine the viscoelastic properties of the material under measurement by optimizing the parameters of an infinite echo model. The system provides a non-destructive approach for in-situ measurement of viscoelastic material properties.

A measuring tube system for a measuring device comprises at least one measuring tube for conducting a flowable medium, wherein the measuring tubes each have two end regions, a first block with at least one first channel passing through the first block, wherein the measuring tubes, in a first end region, are each at least partially conducted through the corresponding first channels and are fixed in the corresponding first channels, a second block with at least one of second channel passing through the second block, wherein the first block and the second block are arranged such that the first channels and the second channels correspondingly adjoin one another and the first block and the second block are connected in a fluid-tight manner. Also disclosed is a measuring device comprising the measuring tube system, and a production method for the measuring tube system.

A method for evaluating the foamability of a test solution. The method includes forming foam in a vertical measurement column including an open top end and a fritted plate proximal to a bottom end by passing a gas stream through the fritted plate and through the test solution present in the vertical measurement column at a gas volume rate (GVR) and a gas flow rate (GFR). The foam travels upwards in the vertical measurement column while the gas stream is passing through the test solution. The method further includes measuring the viscosity of the foam with a vibration viscometer disposed proximal to the top end of the vertical measurement column, and further recording a plurality of vibration viscometer measurement results and storing the results (a surfactant amount C.sub.surf, the GVR, and the GFR) in memory to determine one or more foam properties of the test solution.

The approach presented here relates to an analysis device for analyzing a viscosity of a fluid. The analysis device comprises a detection device and a provisioning device. The detection device is formed to determine the viscosity of the fluid using at least one Doppler parameter of a Doppler spectrum of the fluid. The provisioning device is formed to provide or transmit a viscosity signal that represents the viscosity determined by the detection device.

A method for evaluating the foamability of a test solution. The method includes forming foam in a vertical measurement column including an open top end and a fritted plate proximal to a bottom end by passing a gas stream through the fritted plate and through the test solution present in the vertical measurement column at a gas volume rate (GVR) and a gas flow rate (GFR). The foam travels upwards in the vertical measurement column while the gas stream is passing through the test solution. The method further includes measuring the viscosity of the foam with a vibration viscometer disposed proximal to the top end of the vertical measurement column, and further recording a plurality of vibration viscometer measurement results and storing the results (a surfactant amount C.sub.surf, the GVR, and the GFR) in memory to determine one or more foam properties of the test solution.

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

Determining a physical property of a fluid by: vibrating a vibratory transducer element in a fluid at a vibration frequency, wherein the vibratory transducer element comprises a fluid-contacting elongate member characterised by a width, a half width that is equal to half of the width, and a length that is greater than the width, wherein the half width is less than a propagation depth of a shear wave in the fluid at the vibration frequency; making a measurement of the vibration of the vibratory transducer element in the fluid at the vibration frequency; and determining, based on the measurement of the vibration, a physical property of the fluid such as a viscosity, a viscoelasticity, a density, a fluid stiffness, a loss tangent, a storage modulus, a loss modulus, or a yield stress.

A system for analyzing a hydrogel sample. The system has a plate configured to retain the hydrogel sample, an ultrasound transmitter configured to propagate an ultrasound signal toward the hydrogel sample retained at said plate, and an ultrasound detector configured to receive a reflected ultrasound signal reflected by said plate and passing through the hydrogel sample. A processing device determines a property of the hydrogel sample based on the reflected ultrasound signal, wherein the property comprises viscosity. The processing device can then use the determined property to identify the hydrogel, or compare it with other materials.

[Problem] To provide an ultrasonic physical properties measurement device that suppresses the generation of a secondary flow inside a cylinder, is more portable, and can suppress changes in physical properties. [Solution] An ultrasonic physical properties measurement device 1 that: uses ultrasonic waves to measure the flow velocity profile of fluids that flow inside a cylinder 2, by rotating the cylinder 2 backwards and forwards in a fixed cycle; and calculates the physical properties of fluid from the flow velocity profile. The cylinder 2: has an upper end surface 21 and lower end surface 22 that are penetrated such that fluid can flow therethrough; and comprises a rotation mechanism 3 that supports all or part of the cylinder 2 in a state of immersion in the fluid and rotates the cylinder 2 backwards and forwards.

In fluids, viscosity changes with shear rate, thus measuring viscosity during flowing conditions is essential. Conventionally, rheometers are used for measurement of fluid viscosity but high cost limits its usage. The present disclosure provides systems and methods for real-time measurement of fluid viscosity in flowing conditions using photoacoustic sensing. In the present disclosure, a set of viscosity features are extracted from a plurality of frequency domain photoacoustic (FDPA) signals. The set of viscosity features determine viscosity measurements with high accuracy. A viscosity model is trained from the plurality of FDPA signals when a fluid sample is under static condition. However, same viscosity model is used to measure the viscosity of the fluid sample in flowing conditions by adding an error correction factor. The error correction factor enables training of the viscosity model in static conditions and measuring the viscosity in the flowing conditions in real time.