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Transparent liquid variable temperature viscosity coefficient measurement device based on video

A technology for transparent liquids and measuring devices, applied in the direction of measuring devices, flow characteristics, instruments, etc., can solve problems such as unresolved measurement results, achieve the effects of eliminating measurement errors, saving time and cost, and simplifying the experimental process

Pending Publication Date: 2019-01-22
DALIAN NATIONALITIES UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] These three related patent application documents used technologies such as single tubes with different inner diameters, linear array CCD, laser interruption triggering and temperature control, which made important improvements to the early manual timing, but did not solve and eliminate the complicated falling ball rotation and drift. and other processes on the measurement results, and multiple tests are required to determine the uniform motion stage of the falling ball

Method used

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  • Transparent liquid variable temperature viscosity coefficient measurement device based on video
  • Transparent liquid variable temperature viscosity coefficient measurement device based on video
  • Transparent liquid variable temperature viscosity coefficient measurement device based on video

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A video-based device for measuring the variable temperature viscosity coefficient of transparent liquid, including: a camera component, a falling ball test component, a circulating heating medium component and a scale 22,

[0036] The falling ball test assembly is connected to the circulating heating medium assembly,

[0037] One side of the falling ball test assembly is provided with a camera assembly for taking pictures,

[0038] The falling ball test assembly is provided with a scale 22,

[0039]The drop ball test assembly includes: a transparent drop tube cover 3, a vertical transparent drop tube 4, a drop ball 6, a transparent tubular jacket 7, and a heating medium 8, and the transparent drop tube cover 3 is installed on the vertical transparent drop tube 4. A drop ball 6 is built in the vertical transparent drop tube 4 , a transparent tubular jacket 7 is arranged outside the vertical transparent drop tube 4 , and a heating medium 8 is arranged between the vertica...

Embodiment 2

[0050] The invention relates to a video-based measuring device for variable temperature viscosity coefficient of transparent liquid. The devices include:

[0051] The camera assembly is composed of a camera 1 and a height adjustment bracket 2; the camera 1 is connected to a computer and the computer completes parameter settings such as camera resolution and camera rate, dynamic camera control, recording and post-processing. The pixel resolution of the camera 1 determines the accuracy of the falling distance when recording the falling ball movement; the camera rate of the camera 1 determines the time accuracy of recording the falling ball movement; adjust the height adjustment bracket 2 to a reasonable position, and center the vertical transparent falling ball tube 4 The half section is convenient for recording the motion state when the ball falls at a high speed, so as to improve the accuracy of recording the distance and time of the ball falling.

[0052] The falling ball ex...

Embodiment 3

[0060] Embodiment 3: Measurement of different liquid viscosity coefficients.

[0061] The measuring device in Example 2 is used to measure the viscosity coefficients of water, ethylene glycol and glycerin three different liquids. The inner diameter of the vertical drop tube 4 used is 50mm. The falling balls used were silicon nitride balls with a diameter of 2.98 mm (density 3.2 kg / m3).

[0062] At the same temperature, pour water, ethylene glycol, and glycerin into the vertical drop tube respectively, and keep the temperature of the liquid to be tested at 25°C by adjusting the circulating heating water pump knob; the resolution of the camera used is 1920X1080 Pixel USB camera that shoots at 30 frames per second.

[0063] Use video recording software to record the silicon nitride ball falling from the liquid surface to be tested until the falling ball touches the bottom. After the video recording is over, use video editing software, such as Adobe Premiere, to read the fallin...

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Abstract

The invention discloses a transparent liquid variable temperature viscosity coefficient measurement device based on a video and belongs to the technical field of viscosity coefficient measurement. Thetechnical scheme comprises the fact that a falling ball experiment component is connected with a cyclic heating medium assembly; a camera component for photographing is set at one side of the fallingball experiment component; a scale is set on the falling ball experiment component; a transparent falling ball tube cap is mounted on a vertical transparent falling ball tube; a falling ball is builtin the vertical transparent falling ball tube; a transparent tubular jacket is set out of the vertical transparent falling ball tube; and a heating medium is set between the vertical transparent falling ball tube and the transparent tubular jacket. The device has the beneficial effects that the device is convenient for recording a whole motion process when the falling ball falls, so influence ofcomplex falling ball motion on a measurement result can be timely eliminated; the viscosity coefficient can be measured through utilization of a uniform velocity method; the viscosity coefficient alsocan be measured through utilization of a nonuniform uniform motion method under the condition that uniform velocity sections are short or no uniform velocity section exists; the device is applicableto measurement of the viscosity coefficients of various transparent liquids under different temperatures; and the device has high universality.

Description

technical field [0001] The invention relates to the technical field of viscosity coefficient measurement, in particular to a video-based device for measuring the viscosity coefficient of transparent liquid with variable temperature. Background technique [0002] The viscosity coefficient of a liquid, also known as the internal friction coefficient or viscosity, is an important physical quantity describing the internal friction properties of a liquid. It appears only when there is relative motion in the liquid, and it is sensitive to changes with the temperature of the liquid. Measuring the viscosity coefficient of liquid is not only an important aspect of material science research, but also has important practical significance in technical fields such as lubrication, hydraulic transmission, and aerospace engineering. [0003] There are many methods for measuring the viscosity coefficient of liquids, such as falling ball method, capillary tube method, rotating drum method, et...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N11/12
CPCG01N11/12
Inventor 王利万嘉怡李娜赵秋洁林翔赵海燕刘本康
Owner DALIAN NATIONALITIES UNIVERSITY
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