Vibration based micro liquid viscosity measurement device and measurement method
A measuring device and micro-liquid technology, which is applied in the direction of measuring devices, flow characteristics, instruments, etc., can solve the problems of waste and samples that cannot be recycled, and achieve the effect of simple structure, meeting the needs of experimental measurement, and good measurement effect
Inactive Publication Date: 2018-08-17
TIANJIN UNIV
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Problems solved by technology
Traditional viscosity measurement methods include falling ball method, capillary method, vibration method and rotation method, etc. During the measurement process, the volume of the liquid needs to be on the order of mL, and the samples cannot be recycled after use, resulting in great waste.
[0003] For expensive liquids or liquids that are not easy to extract, it is impossible to measure the viscosity with traditional instruments and equipment
Method used
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Effect test
Embodiment 1
[0057] Under the condition that the room temperature is basically unchanged, the standard viscosity liquid numbered 130204 is measured 10 times, and the damping factor β obtained by fitting is t As shown in Table 1.
[0058] Table 1 Measurement results of damping factor of 130204 standard viscosity liquid
[0059]
[0060] Calculate the damping factor β t The mean is 2.246*10 -2 , with a standard deviation of 0.00029.
Embodiment 2
[0062] The damping factor β was fitted to five different standard viscosity liquids, and then the viscosity and density of the liquid were measured with a viscometer and a balance. The results are shown in Table 2.
[0063] The measurement results of 25 kinds of standard viscosity liquids in table
[0064] name
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Abstract
The invention discloses a vibration based micro liquid viscosity measurement device and measurement method. A parallelogram flexible hinge is vertically arranged on a bracket downward; a micro-cantilever is connected to one side of the lower end of the parallelogram flexible hinge; a reflector is arranged on one side, corresponding to the micro-cantilever, of the parallelogram flexible hinge; a vessel used for accommodating tested liquid is arranged below the micro-cantilever through an electrically-controlled displacement platform; a laser interferometer used for emitting laser to the reflector corresponding to the reflector is arranged on one side of the electrically-controlled displacement platform and is arranged on a manual displacement platform; and the manual displacement platform is arranged on an angle regulator. By adopting the vibration based micro liquid viscosity measurement device and measurement method provided by the invention, a micro-cantilever probe is driven by a hinge mechanism to perform vibration attenuation movement, larger shear stress is applied to the probe, micro relative displacement quantity is collected by the laser interferometer, the volume of the tested liquid can be reduced to 15 microlitres, so that the measurement effect is good, and micro liquid viscosity measurement is realized.
Description
technical field [0001] The invention relates to a liquid viscosity measurement. In particular, it relates to a vibration-based micro liquid viscosity measuring device and a measuring method. Background technique [0002] Viscosity is an important physical parameter to measure the ability of liquid to resist flow. Viscosity measurement technology plays an important role in the fields of petroleum, chemical industry, electric power, metallurgy and national defense. Traditional viscosity measurement methods include falling ball method, capillary method, vibration method and rotation method, etc. During the measurement process, the volume of the liquid needs to be on the order of mL, and the samples cannot be recycled after use, resulting in great waste. . [0003] For expensive liquids or liquids that are not easy to extract, it is impossible to measure the viscosity with traditional instruments and equipment. The patent document CN1815179A provides a test device for measuri...
Claims
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IPC IPC(8): G01N11/16
CPCG01N11/16
Inventor 赵美蓉薛卓阳郑叶龙宋乐黄银国周惠言蔡青梅
Owner TIANJIN UNIV