325 results about "Viscosity measurement" patented technology

A method and system for detecting oil quality. The quality of engine oil can be determined utilizing an acoustic wave sensor to obtain viscosity and corrosivity data associated with the engine oil. The acoustic wave sensor is coated with a material that selectively reacts to at least one type of an acid in order to provide data indicative of the presence of the acids in the engine oil. The etch rate or the corrosivity of the engine oil can be determined based on the frequency data obtained as a result of the frequency measurement utilizing the acoustic wave sensor. The viscosity of the engine oil can additionally be obtained based on a measurement of phase and amplitude obtained from the data utilizing the acoustic wave sensor. The etch rate and the viscosity measurement provide data indicative of the quality of the engine oil.

A micro-fluidic device and methods for measuring one or more rheologic properties of a fluid. The micro-fluidic device includes a substrate and at least one cover bonded to a surface of the substrate with a fluid channel formed in at least one of the cover or the substrate. Further, the micro-fluidic device includes a first differential pressure gauge that can have a first differential pressure sensor in fluid communication with both a first pressure site and a second pressure site. Further still, the micro-fluidic device includes the first pressure site and the second pressure site that can be spaced apart by a first section of the fluid channel. Also, the micro-fluidic device includes a data processor communicatively coupled to the first differential pressure sensor, so as to receive data generated by the first differential pressure sensor.

The noninvasively measurement of the density and viscosity of static or flowing fluids in a section of pipe such that the pipe performs as the sensing apparatus, is described. Measurement of a suitable structural vibration resonance frequency of the pipe and the width of this resonance permits the density and viscosity to be determined, respectively. The viscosity may also be measured by monitoring the decay in time of a vibration resonance in the pipe.

A micro-fluidic device and methods for measuring one or more rheologic properties of a fluid. The micro-fluidic device includes a substrate and at least one cover bonded to a surface of the substrate with a fluid channel formed in at least one of the cover or the substrate. Further, the micro-fluidic device includes a first differential pressure gauge that can have a first differential pressure sensor in fluid communication with both a first pressure site and a second pressure site. Further still, the micro-fluidic device includes the first pressure site and the second pressure site that can be spaced apart by a first section of the fluid channel. Also, the micro-fluidic device includes a data processor communicatively coupled to the first differential pressure sensor, so as to receive data generated by the first differential pressure sensor.

Dermatological / cosmetic compositions suited for preventing or treating cell differentiation and / or proliferation and / or keratinization disorders, including preventing or treating common acne, comprise, in a physiologically acceptable medium, (i) at least one dispersed retinoid, (ii) dispersed benzoyl peroxide, in free or encapsulated form, and (iii) at least one pH-independent gelling agent, said dermatological / cosmetic composition having physical stability without loss of viscosity over time at a temperature ranging from 4° C. to 40° C., said dermatological / cosmetic composition having a stable flow threshold over time as measured by viscosity measurements for rheograms which measure a shear stress τ for a given rate gradient γ and which measure a rate gradient γ for a given shear stress τ, the yield value (τ0) being extrapolated visually or by calculation.

A sensor, method and system, for measuring certain characteristics of a fluid. The sensor utilizes a piezoelectric device having at least two tightly coupled resonators providing a two pole electric transfer function responsive to an electrical signal coupled to the input resonator. The piezoelectric sensor has a textured entrapment layer, constructed to entrap a known volume of fluid and impart motion to the entrapped fluid as well as to surrounding non-trapped fluid. The common mode frequency shift of the two resonant frequencies is related to mass loading due to the entrapped fluid, while the energy absorbed by the fluid, or a phase shift of one of the resonant frequencies, is related to the viscosity / density product of the fluid. Extracting the viscosity is a matter of mathematical manipulation. By controlling the energy level of the input electrical signal, the viscosity measurement may be conducted at a predetermined shear rate.

A cardboard sheet printing apparatus including: a rotating body that freely rotates inside an ink circulation passage through which ink flows, and a rotation-imparting assembly which is magnetically coupled with the rotating body outside the ink circulation passage and imparts rotation to the rotating body. When the rotating body is caused to rotate by the rotation-imparting assembly, the variation in the load current value that occurs upon changes in the viscosity of the ink that contacts the rotating body is detected; and this variation is compared with load current values that correspond to respective changes in the ink viscosity value stored in memory beforehand and is converted into an ink viscosity value and then displayed, so that the viscosity of the ink is adjusted based upon the calculated results.

A Coriolis mass flow measuring device includes a vibratory measuring transducer having at least one measuring tube, which has medium flowing through it during operation. In operation, the measuring tube is caused by an exciter arrangement to undergo mechanical oscillations, especially bending oscillations. Additionally, the Coriolis mass flow measuring device includes a sensor arrangement for producing oscillation measurement signals (s1, s2) representing the inlet-end and outlet-end oscillations of the measuring tube. Measuring device electronics controlling the exciter arrangement produces an exciter current (iexc) and an intermediate value (X′m) derived from the oscillation measurement signals (s1, s2). This intermediate value represents an uncorrected mass flow. Derived from the exciter current and / or from a component of the exciter current (iexc), an intermediate value (X2) is produced, which corresponds to a damping of the oscillations of the measuring tube. This damping is especially a function of an apparent viscosity, and / or a viscosity-density product, of the medium guided in the measuring tube. Furthermore, a correction value (XK) is produced for the intermediate value (X′m) utilizing the intermediate value (X2) and a viscosity measurement value (Xη) determined initially or during operation. The viscosity measurement value (Xη) corresponds to a viscosity of the medium guided in the measuring tube and / or to a predetermined reference viscosity. On the basis of the intermediate value (X′m) and the correction value (XK), the measuring device electronics then produces an exact mass flow rate measurement value (Xm).

The invention relates to a lining viscosity measurement instrument which is provided with a shear type lifting table (1), wherein a bottom plate (2) is arranged at the top of the shear type lifting table (1); a guide light rod (3) and a ball screw nut pair (4) are arranged on the bottom plate (2); a platform (5) is arranged above the bottom plate (2) and is driven by the ball screw nut pair (4) to move up or down; power of the ball screw nut pair (4) is provided by a first motor (21) mounted on the bottom plate (2); a second motor (51), a gear rack mechanism (52) and a linear guide rail (53) are mounted on the platform (5); a pressing head (54) is mounted at the end part of the linear guide rail (53); a sensor (55) is arranged on the pressing head (54) and connected with a controller and a display; the gear rack mechanism (52) is driven by the second motor (51) to push the linear guide rail (53) to horizontally move. According to the device, the lining viscosity can be quickly measured.

Made up of a step of preparing a map expressing a correlation between solid phase percentage and viscosity of a slurry-form semi-solid metal (27) for a given metal composition; a step of setting a target viscosity corresponding to a target solid phase percentage using this map; a viscosity measuring step of measuring the viscosity of a semi-solid metal in a vessel (13) while cooling it; and a step of carrying out cooling until this viscosity reaches the target viscosity, by these steps being carried out in from the preparation of the map expressing the correlation between solid phase percentage and viscosity of the semi-solid metal to the end of cooling of the semi-solid metal the solid phase percentage of the semi-solid metal is made to match the target solid phase percentage. Because the viscosity is detected, the affects of cooling rate changes and time can be eliminated, and it is possible to raise management accuracy of the solid phase percentage of the semi-solid metal much further than with related art management based on time.

The invention relates to a device and method for testing the viscosity of a fluid passing a pipe. For a prior viscosity tester, for example, American patent 4,524,610, a drive makes a sensor sensitive pipe to generate twisting and vibration, so as to generate frictional force in the fluid; and by measuring the drive current, the dynamic viscosity measurement of the fluid can be obtained, and the dynamic viscosity can be obtained by measuring the fluid density. However, for implementing the patent on other instruments, it needs a lot of changes to meet the implementing condition. The present invention is a device allows to get continuous viscosity value, which can be realized on a Coriolis mass flowmeter and comprises at least a sensor sensitive pipe without changing greatly original device, in addition, by measuring the fluid density, the dynamic viscosity of the fluid can be obtained. The invention is to measure the viscosity of a fluid by making the fluid to reach its optimal harmonic-oscillation point and then taking use of different information at the point. The invention is of simple structure, easy to operate. The method is of simple procedures and accurate test results.

A method of evaluating engine oil wear on the basis of viscosity measurement, taking into account the addition of fresh oil is described. First, using the oil viscosity sensor, the amount of oil added in the addition of fresh oil is detected, then the oil viscosity sensor determines the viscosity of the oil mixture (eta2) of the engine oil and fresh oil; the quantity (Vn) of fresh oil added is determined in the electronic analyzer from the difference between the old oil level, i.e., the oil volume (V1), and the new oil level, i.e., oil volume (V2); and the viscosity (etan) of the fresh oil is determined from the viscosity (eta1) of the old engine oil immediately before the point in time of the addition of fresh oil and from the viscosity (eta2) after the addition; and a hypothetical initial viscosity (eta'0) is calculated as a new corrected reference value from the known value of the viscosity (eta0) of the old engine oil in the new condition, the quantity (V1) of the engine oil still present at the point in time of the addition, the calculated viscosity (etan) of the fresh oil and the calculated quantity (Vn) of the fresh oil.