公开(公告)号：US4488427A

公开(公告)日：1984-12-18

申请号：US483142

申请日：1983-04-08

申请人： Frank J. Matusik ,  Donald W. Nelson

发明人： Frank J. Matusik ,  Donald W. Nelson

IPC分类号： G01N11/16

CPC分类号： G01N11/162

摘要： A torsional mode rotational vibratory viscometer having an elastic hollow metal sheath extending below a support plate and secured to the plate by a weld. A rigid rod is disposed within the sheath and welded to the lower end of the sheath. An immersible tip is also secured to the lower end of the sheath. The free upper end of the rod extends above the support plate. A crossbar with ends of magnetically permeable material is secured to the free end of the rod and is caused to oscillate by a magnetic drive coil adjacent one end of the crossbar. Prior to mounting of the crossbar, the assembly is subjected to a specific heat treating schedule. A magnetic detector coil adjacent the other end of the crossbar detects the angular oscillation of the rod. Circuitry connected to the coils maintains the amplitude of oscillation of the rod constant. When the tip is immersed in a fluid, the power supplied to the drive coil is determined by the circuit and is a measure of the viscosity-density product of the fluid. The circuitry includes a sample-and-hold circuit having a clipping level which varies with the detector coil signal level, and a variable exponent amplifier to accurately correct for deviation of the drive coil current-power relationship from a square function.

摘要翻译： 扭转模式旋转振动粘度计，其具有在支撑板下方延伸并通过焊接固定到板上的弹性中空金属护套。 刚性杆设置在护套内并焊接到护套的下端。 一个可浸入的尖端也固定到护套的下端。 杆的自由上端在支撑板的上方延伸。 具有导磁材料端部的横杆固定到杆的自由端，并且通过与横杆的一端相邻的磁力驱动线圈振荡。 在安装横杆之前，对组件进行特定的热处理进度。 邻近横梁另一端的磁检测器线圈检测杆的角振荡。 连接到线圈的电路保持杆的振荡幅度恒定。 当尖端浸入流体中时，提供给驱动线圈的功率由电路确定，并且是流体的粘度密度乘积的量度。 该电路包括具有随检测器线圈信号电平而变化的限幅电平的采样和保持电路，以及用于准确地校正驱动线圈电流 - 功率关系与正方形函数的偏差的可变指数放大器。

公开(公告)号：US5054313A

公开(公告)日：1991-10-08

申请号：US554285

申请日：1990-07-17

申请人： John V. Fitzgerald ,  Teresa M. Walsh ,  Frank J. Matusik ,  John Stone ,  Edmond Dougherty ,  John Batton

发明人： John V. Fitzgerald ,  Teresa M. Walsh ,  Frank J. Matusik ,  John Stone ,  Edmond Dougherty ,  John Batton

IPC分类号： G01N11/00 ,  G01N11/16

CPC分类号： G01N11/16 ,  G01N2011/0006

摘要： Electronic control circuitry for obtaining precise inline process control data as to viscosity of fluids over a wide viscosity range, with high tolerance of ambient noise and vibration. An electromechanical transducer with an oscillating sensor is immersed in a flowing liquid, with the power required to sustain predetermined oscillation parameters being a measure of viscosity-density product. The gain of a variable gain amplifier which provides positive feedback to sustain oscillation is controlled in response to the integrated error signal output of a comparator which compares a DC value corresponding to the RMS amplitude of mechanical oscillation with a DC reference value. The monitoring of RMS amplitude rather than peak amplitude (as is done by a phase-sensitive sample-and-hold arrangement in the prior art), coupled integration of the error signal, results in a great improvement in immunity to ambient noise and vibration. Other features includes automatic calibration and temperature compensation whereby viscosity at a desired temperature can be determined even though the measurement is made at different temperature.

摘要翻译： 电子控制电路，用于获得精确的在线过程控制数据，用于在宽粘度范围内具有高粘度的环境噪声和振动。 将具有振荡传感器的机电换能器浸入流动的液体中，以维持预定振荡参数所需的功率为粘度密度乘积的量度。 响应于将对应于机械振荡的RMS幅度的DC值与DC参考值进行比较的比较器的积分误差信号输出来控制提供正反馈以维持振荡的可变增益放大器的增益。 RMS振幅的监测而不是峰值幅度（如现有技术中的相敏采样保持装置所做的），误差信号的耦合积分导致对环境噪声和振动的抗扰度的极大改进。 其他特征包括自动校准和温度补偿，由此即使在不同温度下进行测量，也可以确定所需温度下的粘度。

公开(公告)号：US4754640A

公开(公告)日：1988-07-05

申请号：US26869

申请日：1987-03-17

申请人： J. Vincent Fitzgerald ,  Frank J. Matusik ,  Donald W. Nelson ,  John L. Schrag

发明人： J. Vincent Fitzgerald ,  Frank J. Matusik ,  Donald W. Nelson ,  John L. Schrag

IPC分类号： G01N11/16

CPC分类号： G01N11/162

摘要： A rheometer for determining the viscoelasticity of a liquid from the mechanical impedance which the liquid presents to an oscillating surface. The incremental power required to maintain a fixed amplitude of oscillation of the surface upon immersion in the liquid is determined. The differential shift in oscillation frequency due to immersion in the liquid is also determined. By relating (i) the incremental oscillation power to mechanical resistance presented by the liquid to the oscillating surface, and (ii) the differential shift in a oscillation frequency to the mechanical reactance presented by the liquid to the oscillating surface, the viscoelasticity of the liquid is determined. Applications include laboratory measurements and process control.

摘要翻译： 用于从液体呈现到振荡表面的机械阻抗确定液体的粘弹性的流变仪。 确定在浸入液体时保持表面振荡固定幅度所需的增量功率。 还确定了由于浸入液体中引起的振荡频率的差异偏移。 通过将（i）增量振荡功率与由液体提供给振荡表面的机械阻力相关联，以及（ii）振荡频率与液体对振荡表面的机械电抗的差异偏移，液体的粘弹性 决心，决意，决定。 应用包括实验室测量和过程控制。

公开(公告)号：US4566181A

公开(公告)日：1986-01-28

申请号：US646696

申请日：1984-08-31

申请人： Frank J. Matusik ,  Donald W. Nelson

发明人： Frank J. Matusik ,  Donald W. Nelson

IPC分类号： G01N11/16 ,  H01F41/00

CPC分类号： G01N11/162 ,  Y10T29/4902

摘要： A torsional mode rotational vibratory viscometer having an elastic hollow metal sheath extending below a support plate and secured to the plate by a weld. A rigid rod is disposed within the sheath and welded to the lower end of the sheath. An immersible tip is also secured to the lower end of the sheath. The free upper end of the rod extends above the support plate. A crossbar with ends of magnetically permeable material is secured to the free end of the rod and is caused to oscillate by a magnetic drive coil adjacent one end of the crossbar. Prior to mounting of the crossbar, the assembly is subjected to a specific heat treating schedule. A magnetic detector coil adjacent the other end of the crossbar detects the angular oscillation of the rod. Circuitry connected to the coils maintains the amplitude of oscillation of the rod constant. When the tip is immersed in a fluid, the power supplied to the drive coil is determined by the circuit and is a measure of the viscosity-density product of the fluid. The circuitry includes a sample-and-hold circuit having a clipping level which varies with the detector coil signal level, and a variable exponent amplifier to accurately correct for deviation of the drive coil current-power relationship from a square function.

摘要翻译： 扭转模式旋转振动粘度计，其具有在支撑板下方延伸并通过焊接固定到板上的弹性中空金属护套。 刚性杆设置在护套内并焊接到护套的下端。 一个可浸入的尖端也固定到护套的下端。 杆的自由上端在支撑板的上方延伸。 具有导磁材料端部的横杆固定到杆的自由端，并且通过与横杆的一端相邻的磁力驱动线圈振荡。 在安装横杆之前，对组件进行特定的热处理进度。 邻近横梁另一端的磁检测器线圈检测杆的角振荡。 连接到线圈的电路保持杆的振荡幅度恒定。 当尖端浸入流体中时，提供给驱动线圈的功率由电路确定，并且是流体的粘度密度乘积的量度。 该电路包括具有随检测器线圈信号电平而变化的限幅电平的采样和保持电路，以及用于准确地校正驱动线圈电流 - 功率关系与正方形函数的偏差的可变指数放大器。

公开(公告)号：US5317908A

公开(公告)日：1994-06-07

申请号：US874821

申请日：1992-04-28

申请人： John V. Fitzgerald ,  Frank J. Matusik ,  John L. Batton

发明人： John V. Fitzgerald ,  Frank J. Matusik ,  John L. Batton

IPC分类号： G01N11/16 ,  G01N11/06

CPC分类号： G01N11/162

摘要： A transducer for inline process control of highly viscous fluids at high pressure and high temperature having a torsionally oscillating sensor tip supported by a pressure resistant threaded body portion. The sensor tip, which includes a thermocouple to measure fluid temperature, is driven by a crossarm which oscillates with a constant angular amplitude, the power required to maintain that amplitude despite the viscous resistance offered by the fluid being a measure of the viscosity-density product of the fluid. The crossarm driver and detector electromagnetic coils are oriented at right angles to each other to reduce crosstalk and transducer housing diameter. The associated electronic control unit includes means to compensate for the effects of fluid flow rate and fluid pressure which were found to be encountered with the vibratory viscometer method of measurement when inline measurements are made on high viscosity fluids.

摘要翻译： 用于在高压和高温下对高粘性流体进行在线过程控制的换能器，其具有由耐压螺纹体部分支撑的扭转振动的传感器尖端。 包括用于测量流体温度的热电偶的传感器尖端由以恒定角度振幅振荡的十字臂来驱动，尽管流体提供的粘性阻力是粘度密度乘积的量度，仍保持该振幅所需的功率 的流体。 交叉驱动器和检测器电磁线圈彼此成直角定向，以减少串扰和换能器壳体直径。 相关联的电子控制单元包括用于补偿当在高粘度流体上进行在线测量时发现使用振动粘度计测量方法遇到的流体流速和流体压力的影响的装置。

公开(公告)号：US4524610A

公开(公告)日：1985-06-25

申请号：US528744

申请日：1983-09-02

申请人： J. Vincent Fitzgerald ,  Frank J. Matusik ,  Donald W. Nelson

发明人： J. Vincent Fitzgerald ,  Frank J. Matusik ,  Donald W. Nelson

IPC分类号： G01N9/00 ,  G01N11/16

CPC分类号： G01N11/167 ,  G01N9/002

摘要： A rotational vibratory viscometer-densitometer for in-line process control and similar applications, having an elastic hollow metal tube extending between two clamps, and a relatively rigid transverse yoke secured to the tube at a point midway between the clamps. The yoke has magnetically permeable ends and a magnetically permeable center portion. Electromagnets adjacent one end of the yoke and the center portion thereof interact with the yoke to cause the tube to oscillate simultaneously in torsion and in flexure at the natural frequency of the tube in combination with the fluid within it. The amplitude of torsional oscillation is maintained constant by a torsional detector and control circuit, and the power required to maintain said amplitude is determined, said power being a measure of the viscosity of the fluid flowing through the tube. The frequency of flexural oscillation of the tube is determined by a flexural detector and associated circuit, said frequency being a measure of the density of the fluid flowing through the tube.

摘要翻译： 用于在线过程控制和类似应用的旋转式振动粘度计密度计，具有在两个夹子之间延伸的弹性中空金属管，以及在夹具之间的中间点固定到管的相对刚性的横向轭。 轭具有导磁端和磁导中心部。 靠近轭的一端的电磁铁和其中心部分与磁轭相互作用，使得管子以与管内的流体相结合的管的固有频率的扭转和弯曲同时振荡。 扭转振荡的幅度由扭转检测器和控制电路保持恒定，并且确定维持所述振幅所需的功率，所述功率是流过管的流体的粘度的量度。 管的弯曲振荡的频率由弯曲检测器和相关联的电路确定，所述频率是流过管的流体的密度的量度。

公开(公告)号：US4299119A

公开(公告)日：1981-11-10

申请号：US129984

申请日：1980-03-13

申请人： J. Vincent Fitzgerald ,  Frank J. Matusik ,  Donald W. Nelson

发明人： J. Vincent Fitzgerald ,  Frank J. Matusik ,  Donald W. Nelson

IPC分类号： G01N11/14

CPC分类号： G01N11/14

摘要： A rotary viscometer of the type which measures the viscous torque to which a rotating spindle is subjected, by measuring the current drawn by the electric motor driving the spindle. True viscosity, i.e. the slope of the torque-spindle rotation speed curve, is approximated by varying the spindle speed stepwise in sets of speed measurements having a fixed speed difference, and obtaining the difference between the corresponding torque values for each set. By repeating this process throughout the desired speed range, an approximate derivative of the torque-speed curve is obtained, corresponding to an approximation of the true viscosity of the fluid being characterized.

摘要翻译： 通过测量由驱动主轴的电动机所吸取的电流，测量旋转主轴所承受的粘性转矩的旋转式粘度计。 通过以具有固定速度差的速度测量集合逐步改变主轴速度，并且获得每组的相应扭矩值之间的差值来逼近真实粘度，即扭矩 - 主轴转速曲线的斜率。 通过在整个期望的速度范围内重复该过程，获得扭矩 - 速度曲线的近似导数，对应于表征的流体的真实粘度的近似值。