公开(公告)号：US20230023301A1

公开(公告)日：2023-01-26

申请号：US17757427

申请日：2020-11-02

申请人： TOHOKU UNIVERSITY

发明人： Kazue Kurihara ,  Masashi Mizukami ,  Motohiro Kasuya

IPC分类号： G01N11/10

摘要： There are provided a viscometer that can accurately measure a bulk viscosity of a small amount of a liquid sample such as 100 μL or less, and a method for measuring viscosity. A viscometer (1) comprises a fixing member (31), an upper unit (10), a lower unit (11), and an information processing unit (50). A method for measuring viscosity comprises measuring a viscosity of the sample by measuring a response voltage during resonance from a detecting means (19) that detects displacement of a leaf spring (17) in one direction due to vibration of the upper unit (10) through applying an AC voltage to a piezoelectric element (15) while changing a frequency by the information processing unit (50).

公开(公告)号：US20220397505A1

公开(公告)日：2022-12-15

申请号：US17836045

申请日：2022-06-09

申请人： Aktiebolaget SKF

发明人： Pieter Martin Lugt ,  Robert Jan Meijer

IPC分类号： G01N11/10 ,  G01N33/28 ,  G01F1/05

摘要： System for determining rheological properties of grease, includes a grease worker having a cylinder intended to contain the grease and a piston intended to move inside the cylinder in a first direction and in a second opposite direction and provided with holes. The grease worker further including a seal provided between the piston and the cylinder, force for measuring the force required to push the grease through the holes of the piston is measured an electrical motor and an eccentrical connection transforming the rotating motion of the motor in a translation motion pushes the grease thought the holes, a thermocouple for measuring a temperature of the cylinder, a fan and a heater for regulating temperature for maintaining constant the measured temperature at a predetermined temperature, and a computing unit configured to determine at least one rheological property of the grease from the measured forces and from the seal friction.

公开(公告)号：US20220105687A1

公开(公告)日：2022-04-07

申请号：US17553083

申请日：2021-12-16

申请人： Carbon, Inc.

发明人： Joshua D. Deetz ,  Catherine E. Wood ,  Ronald A. Truong

IPC分类号： B29C64/393 ,  B29C64/245 ,  B29C64/232 ,  B29C64/264 ,  B29C64/129 ,  B29C64/124 ,  G01L5/00 ,  G01N11/10

摘要： A method of measuring the viscosity of a resin in a bottom-up additive manufacturing apparatus, includes the steps of: (a) providing an additive manufacturing apparatus including a build platform and a light transmissive window, said build platform and said window defining a build region there between, with said window carrying a resin; (b) advancing said build platform and said window towards one another until said build platform contacts said resin; (c) detecting the force exerted on said build platform by said resin; and (d) generating in a processor a viscosity measure of said resin from said detected force.

公开(公告)号：US11041794B2

公开(公告)日：2021-06-22

申请号：US16329124

申请日：2017-08-30

申请人： COMMAND ALKON INCORPORATED

发明人： Denis Beaupre

IPC分类号： G01N11/10 ,  B28C7/02 ,  G01N11/00

摘要： The rheological probe generally has a base; an inner member fixedly connected to the base and extending away from the base, the inner member having in succession a base portion proximate to the base, and a tip away from the base, and a deformable portion located between the base portion and the tip; a shell member covering the inner member, the shell member having a proximal portion being pivotally connected to the base for pivoting about a pivot axis when subjected to a resistance pressure imparted by a relative movement of the probe in a rheological substance, and a distal portion, the distal portion being engaged with the tip, the shell member having mating features being pivotally engaged with corresponding features of the base, the mating features being located on transversally opposite sides of the proximal portion; and a deformation sensor mounted to the deformable portion.

公开(公告)号：US10571380B2

公开(公告)日：2020-02-25

申请号：US15553891

申请日：2016-01-29

申请人： Endress+Hauser GmbH+Co. KG

发明人： Tobias Brengartner

IPC分类号： G01N9/00 ,  G01N11/10 ,  G01N11/00

摘要： Vibronic sensor and method of operation for monitoring the density and/or the viscosity of a medium in a container, comprising a mechanically oscillatable unit, a driving/receiving unit and an electronics unit, wherein the driving/receiving unit is embodied, using an electrical exciter signal, to excite the mechanically oscillatable unit to execute mechanical oscillations, and to receive the mechanical oscillations and to convert them into an electrical, received signal, wherein the electronics unit is embodied to produce the exciter signal such that a predeterminable phase shift is present between the exciter signal and received signal, wherein the electronics unit is embodied to set a first predeterminable phase shift and a second predeterminable phase shift, and to ascertain a first frequency and a second frequency corresponding to the predeterminable phase shifts, and to determine from the two frequencies the density and/or the viscosity of the medium using a first and/or second analytical formula.

公开(公告)号：US20190285610A1

公开(公告)日：2019-09-19

申请号：US16351515

申请日：2019-03-13

申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA

发明人： Long Vinh PHAN

IPC分类号： G01N33/44 ,  G01L1/04 ,  G01N11/10

摘要： Provided is an analysis apparatus configured to analyze characteristics of a viscoelastic material based on a viscoelastic material constitutive law in which an elastic element and a viscoelastic element are arranged in parallel with each other; calculate, in a viscoelastic material model divided into a finite number of elements each having a node, a displacement amount of the node; calculate a strain rate at the node through use of the displacement amount; calculate, as a relaxation time of the viscoelastic element, a value proportional to a value of a power using the strain rate as a base and a value of a power using a shift factor of a temperature-time conversion law as a base; and calculate a stress at the node through use of the relaxation time.

公开(公告)号：US10151728B2

公开(公告)日：2018-12-11

申请号：US14419323

申请日：2013-06-17

申请人： KROHNE Messtechnik GmbH

发明人： Kourosh Kolahi ,  Ralf Storm ,  Andreas Poremba

IPC分类号： G01F1/84 ,  G01N11/00 ,  G01N11/10 ,  G01N27/74

摘要： A method for operating a resonant measurement system has at least one: adjustment device, electric actuation device, electromagnetic vibration generator, vibrating element, and vibration recorder. The adjustment device generates an output signal to trigger the electric actuation device, the electric actuation device provides an electric excitation signal to the electromagnetic drive, the electromagnetic drive excites the vibrating element to the same vibration in at least one normal mode, and the excited vibration is sensed by the vibration recorder and is output as an output signal. To approach, maintain and readjust a resonant point as an operating point of the resonant measurement system, the phase difference between the output signal of the vibration recorder and the adjustment device output signal is acquired, an adjustment deviation is calculated from a predefined phase difference and the acquired phase difference, and the adjustment deviation provided to the adjustment device as an input signal.

公开(公告)号：US09851286B2

公开(公告)日：2017-12-26

申请号：US13797159

申请日：2013-03-12

申请人： Vibrac, LLC

发明人： Robert Searle

IPC分类号： G01N11/00 ,  G01N11/10 ,  G01N11/14

CPC分类号： G01N11/10 ,  G01N11/14

摘要： A highly efficient, highly accurate controllable digital viscosity testing system is provided. The system incorporates a variable speed motor, a digital encoder, a beam-deflection and/or magnetic torque resistance for unidirectional or bi-directional measurement of shear, and an API recommended practice 13B-11ISO 10414-1 bob and rotor sleeve measurement device for submerging in a test sample to measure shear forces exerted by the test sample.

公开(公告)号：US09777542B2

公开(公告)日：2017-10-03

申请号：US13578332

申请日：2011-02-10

申请人： Tore Stock ,  Egil Ronaes ,  Thomas Hilton

发明人： Tore Stock ,  Egil Ronaes ,  Thomas Hilton

IPC分类号： G01N11/10 ,  E21B21/01 ,  E21B47/00 ,  G01N27/92 ,  G01N21/64 ,  G01N33/28 ,  G01N23/223 ,  G01N11/14

CPC分类号： E21B21/01 ,  E21B47/00 ,  G01N11/10 ,  G01N11/14 ,  G01N21/64 ,  G01N23/223 ,  G01N27/92 ,  G01N33/2823

摘要： An automatic drilling fluid property analyzer including a housing having an inlet and an outlet; at least one valve disposed proximate the inlet and configured to open and close to provide a sample of fluid into the housing; an electronic control module configured to send a signal to the at least one valve; a probe assembly operatively coupled to the electronic control module, the probe assembly including an electrode probe having two electrodes and a probe gap therebetween; a viscometer sleeve disposed in the housing; a bob disposed in the sleeve, wherein an annulus is formed between the viscometer sleeve and the bob, and wherein at least one of the viscometer sleeve and the bob is configured to rotate, a motor operatively coupled to at least one of the viscometer sleeve and the bob; and a torque measuring device operatively coupled to the viscometer sleeve and the bob.

公开(公告)号：US20160274012A1

公开(公告)日：2016-09-22

申请号：US15030597

申请日：2014-10-03

申请人： NATIONAL UNIVERSITY CORPORATION TOKYO UNIVERSITY OF AGRICULTURE AND TECHNOLOGY

发明人： Atsushi SAKUMA ,  Yuma SANGO

IPC分类号： G01N3/08 ,  G01N11/10

CPC分类号： G01N3/08 ,  G01N3/42 ,  G01N11/10 ,  G01N2203/0094

摘要： A viscosity coefficient calculation device comprising a resistivity acquiring part that acquires, for each plurality of periods of time until a specific strains is generated when a load is applied to a sample, a value of deformation resistivity corresponding to an apparent modulus of elasticity when modulus of elasticity considered to be in accordance with Hook's law, and an output part that outputs a value of a viscosity coefficient of the sample from the value of the deformation resistivity for the each plurality of periods of time acquired by the resistivity acquiring part using a relational expression associating the deformation resistivity with the viscosity coefficient, the relational expression being a fractional function for periods of time, the relational expression analytically obtained by substituting the deformation resistivity into a first order differential equation for a stress and a strain obtained from a configuration expression of a viscoelasticity model.

摘要翻译： 一种粘度系数计算装置，其特征在于，具有：电阻率取得部，对于在向样品施加载荷时，在产生特定应变的情况下，对于多个时间段，获得与所述样品的弹性模量 被认为符合Hook定律的弹性，以及输出部，其使用关系式从电阻率获取部获取的每个多个时间段中的变形电阻率的值输出样本的粘度系数的值 将变形电阻率与粘度系数相关联，关系表达式是时间段的分数函数，通过将变形电阻率代入应力的一阶微分方程和从a的配置表达式获得的应变分析获得的关系表达式 粘弹性模型