The disclosed apparatus, systems and methods relate to technology that provides a method for the assessment of the polymerization of a sample, e.g., whole blood or blood plasma coagulation, by a non-contact acoustic tweezing device via the application of a sweeping frequency to the levitating sample and the corresponding assessment of extracted sample parameters.

A sonic speed measurement device includes a reception array in which a plurality of reception elements which output reception signals in response to reception of an ultrasonic wave are disposed in one direction, a phase difference detection portion that detects a phase difference between the reception signals output from the reception elements adjacent to each other in a case where the plurality of reception elements receive the ultrasonic wave which propagates in a spherical wave shape from a target point, and a sonic speed calculation portion that calculates a sonic speed of the ultrasonic wave on the basis of the phase difference.

A method is provided to measure viscosity of an analyte using a microfluidic piezoelectric sensor including a channel on an active area of a piezoelectric resonator substrate. The microfluidic piezoelectric sensor is driven so that the active area of the piezoelectric resonator substrate generates shear motion in a direction of shear motion displacement that is parallel with respect to a first surface of the piezoelectric resonator substrate. A high shear-rate viscosity of the analyte is determined based on a shift in resonance of the microfluidic piezoelectric sensor while driving the microfluidic piezoelectric sensor with the analyte in the channel. A low shear-rate viscosity of the analyte is determined by detecting flow of the analyte through the channel based on tracking shifts in resonance of the microfluidic piezoelectric sensor. Related sensors are also discussed.

A system and a method are provided for determining a viscosity of a fluid in a rock formation. The method includes determining a Stoneley mobility using a Stoneley wave measurement in a rock formation containing a fluid; determining a wireline formation tester (WFT) downhole fluid analysis (DFA) mobility by using a wireline formation tester in the rock formation; and determining a viscosity of the fluid based on the Stoneley mobility and the wireline formation tester (WFT) downhole fluid analysis (DFA) mobility.

Systems and methods include a computer-implemented method for performing real-time measurements of drilling fluid in a well. A driver and a reference are monitored for responses by a measurement controller of a system for measuring fluid flow. The driver is configured as a driving electromechanical resonator for contacting the drilling fluid. The reference is configured as a reference electromechanical resonator for contacting the drilling fluid. The reference is of a similar construction as the driver and is in contact with the drilling fluid in a substantially same way. Real-time measurements are performed by the measurement controller based on information received from the driver and reference. A viscosity and density of the drilling fluid are determined based on the real-time measurements. The similar construction of the driver and reference enables mitigation of environmental sensitivities of the driver and reference, enhancing fluid property sensitivities to physical properties of the drilling fluid.

A flow-rate measuring apparatus transmits a first measurement signal having at least one first frequency by a first transducer, and receives the first measurement signal by a second transducer through a fluid inside a pipe. The flow-rate measuring apparatus determines a second frequency based on the first measurement signal. The flow-rate measuring apparatus transmits a second measurement signal having the second frequency by a third transducer toward an interface between the pipe and the fluid, and receives the second measurement signal reflected at the interface by a fourth transducer. The flow-rate measuring apparatus calculates a flow rate of the fluid inside the pipe so as to reflect a viscosity of the fluid based on the first and second measurement signals.

The approach presented here relates to an analysis device (100) for analyzing a viscosity of a fluid (217). The analysis device (100) comprises a detection device (110) and a provisioning device (115). The detection device (110) is formed to determine the viscosity of the fluid (217) using at least one Doppler parameter of a Doppler spectrum of the fluid (217). The provisioning device (115) is formed to provide or transmit a viscosity signal that represents the viscosity determined by the detection device (110).

This disclosure relates generally to a method and system for determining viscosity information of fluids. The present disclosure utilizes an intensity modulated continuous wave (CW) laser diode-based PA sensing method to obtain a continuous wave photoacoustic (CWPA) spectra. Through this CWPA spectra, a full width half maximum (FWHM) and a spectral area is determined to obtain the information about the viscosity of fluids. Although, the CWPA based sensing technique is used for distinguishing different types of abnormalities in tissues, so far it is not used for measuring viscosity which is an important thermo-physical property. The viscosity information of the fluids from the normalized Gaussian fitted CWPA spectra is based on a viscosity feature computed from a FWHM, and a spectral area. The viscosity feature improves the good of fit parameter (R.sup.2) significantly to 0.98 as compared to the traditional only FWHM based viscosity determination for which R.sup.2 is 0.91.

A method for evaluating Dry Eye Disease (“DED”) in a human or animal subject is provided. Thread thinning dynamics of a tear sample of the subject are determined using an acoustically-driven microfluidic extensional rheometry instrument. At least one physical parameter value of the tear sample is calculated based at least in part on the determined thread thinning dynamics. DED is evaluated based at least in part on the at least one calculated physical parameter value of the tear sample. A device for evaluating Dry Eye Disease (DED) in a human or animal subject is also provided. The device includes an acoustically-driven microfluidic extensional rheometry instrument and a processing device configured to evaluate DED based at least in part on the calculated at least one physical parameter value of the tear sample.

A system for sensing the volume and/or viscosity of a slurry (e.g., like concrete) contained in a rotating container or drum, having a sensor and a signal processor. The sensor is configured to attach inside a rotating container or drum having a known geometry, sense angular positions of the sensor and also sense associated entry and exit points when the sensor enters and exits the slurry, including concrete, contained in the rotating container or drum, and provide signaling containing information about the angular positions and the associated entry and exit points. The signal processor receives the signaling, and determines corresponding signaling containing information about a volumetric amount, or a viscosity, or both, of the slurry in the rotating container or drum, based upon the signaling received.