Instrument for measuring viscosity coefficient of opaque liquid

Abstract

The utility model discloses an opaque liquid viscosity coefficient tester which comprises a measuring mechanism and a data acquisition mechanism, the measuring mechanism comprises a test tube, and the data acquisition mechanism comprises a Hall sensor, a temperature sensor, a pressure sensor and a single chip microcomputer; a probe of the Hall sensor is arranged in the middle of the outer wall of the test tube, the temperature sensor is arranged on the outer side of the test tube, and the pressure sensor is arranged at the bottom of the test tube; the single-chip microcomputer is used for receiving and processing signals of the Hall sensor, the temperature sensor and the pressure sensor and calculating the viscosity coefficient. The non-transparent liquid viscosity coefficient measuring device integrates various sensors including the Hall sensor, the temperature sensor and the pressure sensor, has high measuring precision and reliability, can accurately measure the viscosity coefficient of non-transparent liquid, and widens the experimental measuring range. The tester is short in measuring process, high in speed, convenient to operate and capable of achieving data visualization, and has great superiority compared with a traditional measuring process.

Description

Technical Field

[0001] The utility model relates to the technical field of experimental instruments, in particular to an instrument for measuring the viscosity coefficient of an opaque liquid. Background Art

[0002] The viscosity coefficient of a liquid is also called the internal friction coefficient or viscosity. It is an important physical quantity that describes the internal friction properties of a liquid. The viscosity coefficient of a liquid is an important parameter that reflects the ability of a liquid to resist deformation. It is only manifested when there is relative motion in the liquid. There are many methods for measuring the viscosity coefficient, including the falling ball method, the capillary method, the rotating drum method, etc. Among them, the falling ball method is the most basic method. The physical phenomenon of this method is obvious and the principle is intuitive. Since the traditional viscosity coefficient measuring instrument uses manual timing or photoelectric gate speed measurement to obtain the falling speed, such methods can only be applied to liquids with low opacity to be tested, such as castor oil, detergent, etc., and there are limitations on the types of liquids to be measured; however, in actual industrial and life fields, most of the liquids that need to be measured are low-transparency liquids, so traditional viscosity coefficient measuring instruments are no longer suitable for daily use. In addition, traditional measuring instruments are difficult to operate, have a low degree of visualization, require more complex data processing, and have a certain threshold for use. The existing integrated viscosity coefficient measuring instrument is expensive and has a high cost of use. The market urgently needs a viscosity coefficient measuring instrument with low cost, simple operation, low threshold for use, and a wide measurement range.

[0003] Nowadays, some viscosity coefficient measuring instruments suitable for non-transparent liquids have been launched. For example, patent CN221445760U discloses an experimental device for measuring liquid viscosity coefficient, including a main control module, a falling ball module and a falling ball buffer collection module, wherein the falling ball module includes a falling ball release component, a falling ball tube and a Hall sensor, which can improve the accuracy of measuring the viscosity coefficient of non-transparent liquids. However, the above-mentioned viscosity coefficient measuring instrument needs to be connected to the host computer via Bluetooth to calculate the viscosity coefficient, and only considers the possibility of measuring the viscosity coefficient by the Hall effect, without considering the possible influence of other factors in the experimental environment on the results. Utility Model Content

[0004] The utility model aims to provide an instrument for measuring the viscosity coefficient of an opaque liquid in view of the deficiencies of the prior art.

[0005] An instrument for measuring the viscosity coefficient of an opaque liquid comprises a measuring mechanism and a data acquisition mechanism. The measuring mechanism comprises a test tube, and the data acquisition mechanism comprises a Hall sensor, a temperature sensor, a pressure sensor and a single-chip computer. The probe of the Hall sensor is arranged at the middle of the outer wall of the test tube, the temperature sensor is arranged at the outside of the test tube, and the pressure sensor is arranged at the bottom of the test tube. The single-chip computer is used to receive and process signals from the Hall sensor, the temperature sensor and the pressure sensor, and calculate the viscosity coefficient.

[0006] Further, the data acquisition mechanism further includes a display screen, which is electrically connected to the single-chip microcomputer and is used to display the viscosity coefficient and temperature.

[0007] Further, the measuring mechanism further includes a bracket, which includes a base and a fixing frame, and the test tube is arranged in the fixing frame.

[0008] Further, the pressure sensor is arranged on the upper surface of the base.

[0009] Further, the pressure sensor adopts an HX711 sensor.

[0010] Further, the Hall sensor adopts a Hall sensor 3144, which is an NPN normally open switch sensor, and outputs a low level when the Hall sensor senses the spherical magnet.

[0011] Further, the display screen adopts a TFT-LCD display, and the model is ST7735.

[0012] Further, the temperature sensor adopts a DS18B20 temperature sensor.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] The novel viscosity coefficient measuring instrument designed by the present utility model integrates a variety of sensors, including a Hall sensor, a temperature sensor, and a pressure sensor. The Hall sensor is used to measure the time interval when the spherical magnet passes through the sensor during the uniform falling in the liquid, so as to calculate the falling speed of the magnet; the pressure sensor is used to detect the pressure signal of the liquid, so as to calculate the density of the liquid; the temperature sensor is used to measure the temperature of the surrounding environment and reduce the influence of temperature on the measurement of the viscosity coefficient. Therefore, the measuring instrument has high measurement accuracy and reliability, can accurately measure the viscosity coefficient of opaque liquids, and broadens the experimental measurement range. The measuring process of this measuring instrument is short, fast, and easy to operate. The setting of the single-chip microcomputer simplifies the experimental steps through program operation, and the setting of the display screen can realize data visualization, which has great superiority compared with the traditional measurement process. Description of the Drawings

[0015] Figure 1 It is a schematic structural diagram of the opaque liquid viscosity coefficient measuring instrument of the present utility model.

[0016] Markings in the figure: 1. Test tube; 2. Hall sensor, 2-1. Probe; 3. Temperature sensor; 4. Pressure sensor; 5. Single-chip microcomputer; 6. Display screen; 7. Bracket; 7-1. Base; 7-2. Fixing frame. Detailed Embodiments

[0017] The following further describes the present utility model in conjunction with the accompanying drawings and embodiments.

[0018] As Figure 1 shown, the present utility model provides an opaque liquid viscosity coefficient measuring instrument, including a measuring mechanism and a data acquisition mechanism. The measuring mechanism includes a test tube 1 and a bracket 7. The bracket 7 includes a base 7-1 and a fixing frame 7-2. The test tube 1 is arranged in the fixing frame 7-2. During the measurement process, the measuring mechanism must be used in cooperation with a spherical magnet.

[0019] The data acquisition mechanism includes a Hall sensor 2, a temperature sensor 3, a pressure sensor 4, a single-chip microcomputer 5, and a display screen 6. The probe 2-1 of the Hall sensor 2 is arranged in the middle of the outer wall of the test tube 1. The temperature sensor 3 is arranged outside the test tube 1. The pressure sensor 4 is arranged at the bottom of the test tube 1 and on the upper surface of the base 7-1. The single-chip microcomputer 5 is used to receive and process the signals of the Hall sensor 2, the temperature sensor 3, and the pressure sensor 4, and calculate the viscosity coefficient. The display screen 6 is electrically connected to the single-chip microcomputer 5 and is used to display the viscosity coefficient and the temperature.

[0020] In an embodiment of the present utility model, the model of the pressure sensor 4 is the HX711 sensor. The model of the Hall sensor 2 is 3144, which is an NPN normally open switch sensor that outputs a low level when the Hall sensor 2 senses the spherical magnet. The model of the display screen 6 is a TFT-LCD display, specifically the ST7735. The model of the temperature sensor 3 is the DS18B20.

[0021] When the opaque liquid viscosity coefficient measuring instrument of the present utility model is in use, the spherical magnet is placed at the top of the test tube 1 for free fall. Since there is a magnetic field around the spherical magnet during the falling process, after the magnetic field induction surface of the Hall sensor 2 detects a strong enough magnetic field intensity, a certain output level is generated. By recording the duration of the low level, the falling time of the spherical magnet through a certain distance is obtained. By calculating the ratio of the induced distance to the time through a program, the falling speed of the magnet is obtained, and thus the magnet speed v is obtained. At the same time, the mass of the liquid in the glass tube is obtained by reading the value of the pressure sensor 4. When the liquid volume is constant, the liquid density can be obtained. Temperature has a great influence on the viscosity coefficient. The temperature sensor 3 reads the room temperature reading T. The single-chip microcomputer 5 integrates the sensors. After obtaining the values, the built-in program performs formula operations, and finally the liquid density, the spherical magnet speed, the room temperature, and the liquid viscosity coefficient are displayed on the display screen, realizing the integration of the instrument for measuring the viscosity coefficient.

Claims

1. An instrument for measuring the viscosity coefficient of an opaque liquid, comprising a measuring mechanism and a data acquisition mechanism, wherein the measuring mechanism comprises a test tube (1); characterized in that: The data acquisition mechanism comprises a Hall sensor (2), a temperature sensor (3), a pressure sensor (4) and a single chip microcomputer (5); the probe (2-1) of the Hall sensor (2) is arranged in the middle of the outer wall of the test tube (1), the temperature sensor (3) is arranged outside the test tube (1), and the pressure sensor (4) is arranged at the bottom of the test tube (1); the single chip microcomputer (5) is used to receive and process the signals of the Hall sensor (2), the temperature sensor (3) and the pressure sensor (4), and calculate the viscosity coefficient.

2. The opaque liquid viscosity coefficient measuring instrument according to claim 1, characterized in that: The data acquisition mechanism also includes a display screen (6), and the display screen (6) is electrically connected to the single chip computer (5).

3. The opaque liquid viscosity coefficient measuring instrument according to claim 1, characterized in that: The measuring mechanism further comprises a support (7), wherein the support (7) comprises a base (7-1) and a fixing frame (7-2), and the test tube (1) is arranged in the fixing frame (7-2).

4. The opaque liquid viscosity coefficient measuring instrument according to claim 3, characterized in that: The pressure sensor (4) is arranged on the upper surface of the base (7-1).

5. The opaque liquid viscosity coefficient measuring instrument according to claim 1 or 4, characterized in that: The pressure sensor (4) adopts an HX711 sensor.

6. The opaque liquid viscosity coefficient measuring instrument according to claim 1, characterized in that: The Hall sensor (2) adopts the Hall sensor 3144.

7. The opaque liquid viscosity coefficient measuring instrument according to claim 2, characterized in that: The display screen (6) adopts a TFT-LCD display, model number is ST7735.

8. The opaque liquid viscosity coefficient measuring instrument according to claim 1, characterized in that: The temperature sensor (3) adopts a DS18B20 temperature sensor.

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