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公开(公告)号：US4679427A
公开(公告)日：1987-07-14
申请号：US854755
申请日：1986-04-21
CPC分类号： G01N11/16
摘要： An apparatus for measuring the viscosity of a viscous substance as a sample to be measured has a tuning fork type vibrator having two vibrating plates opposing to each other at a distance. These vibrating plates are vibrated at equal frequencies in inversed phase relation to each other by means of a variable vibration generator. The vibrating members have thin plate-like sensitive members provided at their respective lower ends. An amplitude obtained by immersing the sensitive members in a viscous substance and vibrating the former is detected by a pickup device to detect a change in amplitude according to the viscous resistance of the viscous substance thereby to measure the viscosity thereof. The viscosity measuring apparatus has means for regulating the frequency of the vibration generator so as to vary the frequency according to need. Thus, when the relationship between viscosity and responsive vibration no longer maintains a substantially linear relationship at a predetermined driving frequency, the setting of the driving frequency is renewed, thereby allowing viscosity to be measured over a wide range and with a high accuracy.
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公开(公告)号：US4602505A
公开(公告)日：1986-07-29
申请号：US559948
申请日：1983-12-09
CPC分类号： G01N11/16
摘要： An apparatus for measuring the viscosity of a viscous substance as a sample to be measured has a tuning fork type vibrator having two vibrating plates opposing to each other at a distance. These vibrating plates are vibrated at equal frequencies in inversed phase relation to each other by means of a variable vibration generator. The vibrating members have thin plate-like sensitive members provided at their respective lower ends. An amplitude obtained by immersing the sensitive members in a viscous substance and vibrating the former is detected by a pickup device to detect a change in amplitude according to the viscous resistance of the viscous substance thereby to measure the viscosity thereof. The viscosity measuring apparatus has means for regulating the frequency of the vibration generator so as to vary the frequency according to need. Thus, when the relationship between viscosity and responsive vibration no longer maintains a substantially linear relationship at a predetermined driving frequency, the setting of the driving frequency is renewed, thereby allowing viscosity to be measured over a wide range and with a high accuracy.
摘要翻译： 用于测量作为待测样品的粘性物质的粘度的装置具有一个音叉式振动器，它具有彼此相距一定距离的两个振动板。 这些振动板通过可变振动发生器以相反的相位关系彼此振动。 振动部件具有设置在其各自下端的薄板状敏感部件。 通过拾取装置检测通过将敏感部件浸入粘性物质并使其振动而获得的振幅，以根据粘性物质的粘性阻力来检测振幅变化，从而测量其粘度。 粘度测量装置具有用于调节振动发生器的频率以便根据需要改变频率的装置。 因此，当在预定的驱动频率下，粘度和响应振动之间的关系不再保持基本线性关系时，驱动频率的设定被更新，从而允许在宽范围和高精度下测量粘度。
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公开(公告)号：US4729237A
公开(公告)日：1988-03-08
申请号：US941060
申请日：1986-12-12
CPC分类号： G01N11/16
摘要： A vibration-type viscosity measuring apparatus having a pair of vibrator subassemblies that can be resonated as a tuning fork. Each of the pair of vibrator subassemblies constituting a tuning fork has at its free end a sensor plate comprised of a thin metal plate to be inserted into a sample. Each vibrator subassembly has a center line of vibration about which the vibrator subassembly vibrates and a center of gravity aligned on the center line of vibration. A detector is provided for detecting electrically the vibration amplitude of the vibrator subassemblies that are driven together with the sensor plates at the same frequency in reverse phase relation to each other. The vibration amplitude is changed due to the viscosity resistance of the sample applied to the sensor plates. A thermometer probe is provided at the intermediate point between the sensor plates and can be inserted together with the pair of sensor plates into the sample thereby simultaneously measuring the viscosity and the temperature of the sample.
摘要翻译： 振动型粘度测定装置，具有能够作为音叉谐振的一对振子组件。 构成音叉的一对振子组件中的每一个在其自由端处具有由插入样品中的薄金属板构成的传感器板。 每个振动器子组件具有振动子组件振动的中心线，并且重心在振动中心线上对准。 检测器被提供用于电子地检测振动器子组件的振动幅度，所述振动器子组件与传感器板一起以相反的相位关系相同的频率驱动。 由于施加到传感器板的样品的粘度阻力，振动幅度变化。 在传感器板之间的中间点处设置温度计探针，并且可以将一对传感器板一起插入到样品中，从而同时测量样品的粘度和温度。
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4.发明授权
公开(公告)号：US4993480A
公开(公告)日：1991-02-19
申请号：US440402
申请日：1989-11-17
CPC分类号： G01N11/00 , G05D23/1931
摘要： Temperature controlling means for a thermostat for use in viscosity measurement including: a first thermometer detecting the temperature of a fluid sample which is immersed in a thermostat and whose viscosity is measured; a first controller obtaining the difference between a desired set point and the detected value of the sample temperature, momently calculating a set point of temperature of the thermostat according to an operation formula expresed as a function of the above temperature difference and making a controlled signal corresponding to the calculated set point; a second thermometer detecting the temperature of the thermostat; a heating and cooling device for heating and cooling a medium bath of the thermostat; and a second controller making a controlled signal for operating the heating and cooling device under a PID control formed on the basis of the difference between the calculated set point and the detected value of the thermostat temperature and inputting the PID controlled signal into the heating and cooling device.
摘要翻译： 温度控制装置，用于粘度测量中使用的恒温器，包括：第一温度计，检测浸入恒温器中并测量其粘度的流体样品的温度; 获得所需设定点与检测温度的检测值之间的差的第一控制器，根据作为上述温差的函数表示的运算公式计算恒温器的设定温度，并对其进行控制信号 到计算的设定点; 检测恒温器温度的第二温度计; 用于加热和冷却恒温器的介质浴的加热和冷却装置; 以及第二控制器，在基于所计算的设定点与所述恒温器温度的检测值之间的差异形成的PID控制下，形成用于操作所述加热和冷却装置的受控信号，并将所述PID控制信号输入到所述加热和冷却 设备。
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公开(公告)号：US4941346A
公开(公告)日：1990-07-17
申请号：US273273
申请日：1988-11-18
IPC分类号： G01N11/16
CPC分类号： G01N11/16
摘要： A vibration-type rheometer comprises a vibration-type viscometer having a pair of vibrator subassemblies which resonate as in a tuning fork. The pair of vibrator subassemblies constituting a tuning fork vibrator each has at its free end a sensor plate formed from a thin metal plate places into a sample to be measured, and the vibrator subassemblies are driven at the same frequency but in opposite phase relationship to each other by an electromagnetic driving unit together with the sensor plates. A control unit supplies a time-varying driving current whose magnitude varies with time to the electromagnetic driving unit in order to change the vibration-applying force applied to the pair of vibrator subassemblies. The amplitude of vibration of the vibrator subassemblies changes as a function of the viscous resistance encountered by the sensor plates from the sample and the amplitude is electrically detected, and the detected value is sent to a recording unit together with the value of the driving current to thereby indicate the behavior of the sample.
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