A method and system for online measurement of alcohol mass flow

Abstract

The present invention relates to the field of intelligent wine picking technology, and in particular to an online measurement method and system for alcohol mass flow rate. The method is based on a transparent alcohol container and a camera set corresponding to the transparent alcohol container. The method includes: obtaining the liquid level height, alcohol meter reading and thermometer reading of the alcohol solution in the original image according to the original image captured by the image acquisition device; obtaining the volume flow rate of the current alcohol solution according to the liquid level height of the alcohol solution in the original image and the pre-set container volume flow parameter; obtaining the mass flow rate of the current alcohol solution according to the container volume flow parameter and the volume flow rate of the current alcohol solution, as well as the alcohol meter reading and thermometer reading in the original image. The beneficial effect is that the mass flow rate of the alcohol solution can be automatically measured while ensuring the accuracy of the measurement result.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent wine picking, and in particular to an alcohol mass flow online measurement method and system. Background Art

[0002] In order to ensure the stability of liquor production, the mass flow rate of liquor needs to be measured when picking the liquor.

[0003] Generally speaking, workers roughly estimate the current mass flow rate of production by weighing the wine produced within a certain period of time. In addition, the alcohol content of the liquor when picking is also an important factor in judging the current liquor stage. The traditional method is that workers use an alcohol meter to measure the alcohol content of the current liquor and judge the specific reading by human eyes. In the long run, the labor intensity is high and the efficiency is not high. With the development of automation and information technology today, the wine industry also needs to transform and upgrade to realize production automation and make the alcohol production process more accurate and efficient.

[0004] Therefore, an online measurement method for alcohol mass flow rate is designed to automatically measure the mass flow rate of the alcohol solution during the wine picking process and ensure the accuracy of the mass flow rate measurement. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides an alcohol mass flow online measurement method and system, which solves the technical problems of low efficiency and inaccurate measurement results in the process of manual measurement of mass flow in traditional methods.

[0007] (II) Technical solution

[0008] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0009] In a first aspect, an embodiment of the present invention provides an alcohol mass flow online measurement method and system, the method is based on a transparent alcohol container and a camera corresponding to the transparent alcohol container, the method comprising:

[0010] S11, according to the original image captured by the image acquisition device, obtaining the liquid level height of the alcohol solution in the original image, the alcohol meter reading and the thermometer reading; the original image includes the liquid level information of the alcohol solution in the transparent alcohol container, and the alcohol meter and thermometer information located inside the transparent alcohol container;

[0011] S12, obtaining the current volume flow rate of the alcohol solution according to the liquid level height of the alcohol solution in the original image and the preset container volume flow rate parameter;

[0012] S13. Obtain the mass flow rate of the current alcohol solution according to the volume flow rate parameter of the container and the volume flow rate of the current alcohol solution, as well as the alcohol meter reading and the thermometer reading in the original image.

[0013] Optionally, the S12 includes:

[0014] According to the liquid level height of the alcohol solution in the original image and the preset container volume flow parameters, as well as the preset formula 1, the current volume flow rate of the alcohol solution is obtained; the container volume flow parameters include: the bottom area of ​​the transparent alcohol container, the liquid level height change rate and the first volume flow coefficient;

[0015] The formula 1 is:

[0016]

[0017] Among them, Q in is the current volume flow rate of the alcohol solution, S is the bottom area of ​​the alcohol container, is the liquid level change rate, μ1 is the preset first volume flow coefficient, and h1 is the liquid level height of the alcohol solution in the original image.

[0018] Optionally, before S11, the step further includes:

[0019] S01-1. Obtaining the liquid level height of the alcohol solution in the first steady-state image according to the first steady-state image acquired by the image acquisition device; the first steady-state image includes liquid level information of the alcohol solution in the transparent alcohol container when the alcohol solution is continuously added to the transparent alcohol container based on a preset first initial volume flow rate until the liquid level in the transparent alcohol container reaches a steady state;

[0020] S01-2, obtaining a first volume flow coefficient according to the liquid level height of the alcohol solution in the first steady-state image and a preset first initial volume flow rate, and a preset formula 2;

[0021] The formula 2 is:

[0022]

[0023] Where, μ1 is the first volume flow coefficient, is the preset first initial volume flow rate, and h0 is the liquid level height of the alcohol solution in the first steady-state image.

[0024] Optionally, the original image includes a first original image and a second original image;

[0025] At this time, the S11 includes:

[0026] According to the first original image acquired by the first image acquisition device, the liquid level height of the alcohol solution in the first original image is obtained; according to the second original image acquired by the second image acquisition device, the alcohol meter reading and the thermometer reading are obtained;

[0027] The first original image includes liquid level information of the alcohol solution in the first transparent alcohol container; the second original image includes information of the alcohol meter and the thermometer located inside the second transparent alcohol container;

[0028] The transparent alcohol container includes a first transparent alcohol container and a second transparent alcohol container; the image acquisition device includes a first image acquisition device and a second image acquisition device.

[0029] Optionally, the S13 includes:

[0030] According to the liquid level height of the alcohol solution in the first original image and the preset container volume flow parameter, and the preset formula three, the current volume flow of the alcohol solution is obtained; the container volume flow parameter includes a second volume flow coefficient and a volume flow constant;

[0031] The formula three is:

[0032] Q in =h2*(μ2+μ3)+a+b;

[0033] Among them, Q in is the current volume flow rate of the alcohol solution, h2 is the liquid level height of the alcohol solution in the first original image, μ2 and μ3 are the preset second volume flow coefficients, and a and b are the preset volume flow constants.

[0034] Optionally, before S11, the step further includes:

[0035] S02-1. Obtaining the liquid level height of the alcohol solution in the second steady-state image according to the second steady-state image acquired by the first image acquisition device; obtaining the liquid level height of the alcohol solution in the third steady-state image according to the third steady-state image acquired by the second image acquisition device;

[0036] The second steady-state image includes liquid level information of the alcohol solution in the first transparent alcohol container when the alcohol solution is continuously added to the transparent alcohol container based on a preset second initial volume flow rate until the liquid levels in the first transparent alcohol container and the second transparent alcohol container both reach a steady state;

[0037] The third steady-state image includes liquid level information of the alcohol solution in the second transparent alcohol container when the alcohol solution is continuously added to the transparent alcohol container based on a preset second initial volume flow rate until the liquid levels in the first transparent alcohol container and the second transparent alcohol container both reach a steady state;

[0038] S02-2, recording the second initial volume flow rate, the liquid level height in the second steady-state image, and the liquid level height in the third steady-state image as a set of process data;

[0039] S02-3, determining whether a second volume flow coefficient and a volume flow constant can be obtained based on all process data and the preset formula 4;

[0040] If not, the size of the second initial volume flow rate is changed and the process jumps to step S02-1 until the second volume flow coefficient and the volume flow constant are obtained according to all process data and the preset formula 4;

[0041] The formula 4 is:

[0042]

[0043] in, is the preset second volume flow rate, h3 and h4 are the liquid level height in the second steady-state image and the liquid level height in the third steady-state image respectively, μ2 and μ3 are the second volume flow coefficients, and a, b and c are volume flow constants.

[0044] Optionally, the S13 includes:

[0045] S13-1, according to the reading of the alcohol meter and the thermometer, traverse the preset conversion table to obtain the alcohol content corresponding to the reading of the alcohol meter at the standard temperature;

[0046] S13-2, according to the alcohol content corresponding to the standard temperature, the volume flow rate of the current alcohol solution and the preset formula 5, the mass flow rate of the current alcohol solution is obtained; the formula 5 is:

[0047]

[0048] Where W is the mass flow rate of the current alcohol solution, A is the alcohol content at the standard temperature, Q in is the volume flow rate of the current alcohol solution.

[0049] Optionally, the alcohol meter includes N alcohol meters with different ranges, wherein N is a natural number not equal to 0;

[0050] Then the S11 further includes:

[0051] All alcohol meter readings in the original image are recorded, and according to the alcohol meter range corresponding to each alcohol meter reading, the reading that meets the corresponding alcohol meter range is selected as the final alcohol meter reading.

[0052] Optionally, the method further comprises:

[0053] When the original image is captured by the image acquisition device to obtain the mass flow rate corresponding to the original image, the original image and the current volume flow rate, liquid level height of the alcohol solution, alcohol meter reading, thermometer reading and mass flow rate of the alcohol solution corresponding to the original image are saved as a group of data.

[0054] In a second aspect, an embodiment of the present invention provides an alcohol mass flow online measurement system, comprising a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement an alcohol mass flow online measurement method.

[0055] (III) Beneficial effects

[0056] The beneficial effects of the present invention are as follows: the present invention provides an alcohol mass flow online measurement method and system, which records the liquid level information, alcohol meter reading information and thermometer reading information in the original image in real time through an image acquisition device. Compared with the prior art, it can realize automatic measurement of the mass flow of the alcohol solution while ensuring the accuracy of the measurement results. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 This is a flow chart of an alcohol mass flow online measurement method according to Example 1 of the present invention;

[0058] Figure 2 This is a schematic structural diagram of a single-capacity water tank device according to Embodiment 1 of the present invention;

[0059] Figure 3 Schematic diagram of the structure of a double-capacity water tank device according to Example 2 of the present invention. DETAILED DESCRIPTION

[0060] In order to better explain the present invention and facilitate understanding, the following words are explained:

[0061] Picking wine: Picking wine is an important step in the production process of Chinese liquor. During the distillation process of liquor, the quality of the liquor distilled at different time periods is different. Picking wine means dividing the distilled liquor into different grades according to factors such as aroma, alcohol content and quality: first wine, second wine, third wine and last wine.

[0062] Conversion table: that is, alcohol content conversion table. Since the ethanol content changes with temperature, it is necessary to consult the alcohol content conversion table based on the temperature and alcohol meter reading to get the accurate alcohol content.

[0063] The present invention will be described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0064] An embodiment of the present invention proposes an online measurement method for alcohol mass flow, which records the liquid level information, alcohol meter reading information and thermometer reading information in the original image in real time through an image acquisition device. Compared with the prior art, it can realize automatic measurement of the mass flow rate of the alcohol solution while ensuring the accuracy of the measurement results.

[0065] In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0066] Example 1

[0067] This embodiment provides an alcohol mass flow online measurement method, which is applied in the wine picking process. The process is as follows: Figure 1 As shown, the method is implemented based on a single-capacity water tank device, the device is as shown Figure 2 As shown, the device includes: a transparent alcohol container containing an alcohol solution, a thermometer located in the transparent alcohol container, N alcohol meters with different measuring ranges, and an image acquisition device with a shooting direction toward the transparent alcohol container.

[0068] After the alcohol solution flows from the wine receiving bowl into the transparent alcohol container, it flows out from the wine outlet arranged at the bottom of the transparent alcohol container; in the above process, the thermometer and all alcohol meters can only float up and down with the change of the liquid level of the alcohol solution.

[0069] At preset intervals, based on the original image captured by the image acquisition device, the liquid level height of the alcohol solution in the original image, the alcohol reading and the thermometer reading are obtained and recorded; the original image includes the liquid level information of the alcohol solution in the transparent alcohol container, and the alcohol meter information and thermometer information located inside the transparent alcohol container.

[0070] According to the liquid level height of the alcohol solution in the original image and the preset container volume flow parameters, as well as the preset formula 1, the current volume flow rate of the alcohol solution is obtained; the container volume flow parameters include: the bottom area of ​​the transparent alcohol container, the liquid level height change rate and the first volume flow coefficient;

[0071] The formula 1 is:

[0072]

[0073] Among them, Q in is the current volume flow rate of the alcohol solution, S is the bottom area of ​​the alcohol container, is the liquid level change rate of the transparent alcohol container, μ1 is the preset first volume flow coefficient, and h1 is the liquid level height of the alcohol solution in the original image.

[0074] The liquid level change rate is obtained according to the liquid level heights in two consecutive original images and the preset formula 6; the formula 6 is:

[0075]

[0076] in, is the liquid level change rate, Δh is the difference between the liquid level heights in two consecutive original images, and T is the preset time interval.

[0077] The first volume flow coefficient needs to be calibrated, and a liquid with a known fixed volume flow rate (pre-set first initial volume flow rate) is continuously added to the transparent alcohol container. When the liquid level of the transparent alcohol container reaches a steady state, a first steady-state image can be acquired by an image acquisition device to obtain the liquid level height of the alcohol solution in the first steady-state image;

[0078] Obtaining a first volume flow coefficient according to the liquid level height of the alcohol solution in the first steady-state image and a preset first initial volume flow rate, and a preset formula 2;

[0079] The formula 2 is:

[0080]

[0081] Where, μ1 is the first volume flow coefficient, is the preset first initial volume flow rate, and h0 is the liquid level height of the alcohol solution in the first steady-state image.

[0082] In addition, according to the original image, the readings of N alcohol meters in the original image are recorded, that is, R = {R1, R2, ..., R N} and the reading of the thermometer, select the reading that meets the range from the set R, and then traverse the preset conversion table according to the reading of the thermometer to obtain the corresponding alcohol content at the standard temperature.

[0083] According to the corresponding alcohol content at the standard temperature, the volume flow rate of the current alcohol solution and the preset formula 5, the mass flow rate of the current alcohol solution is obtained; the formula 5 is:

[0084]

[0085] Where W is the mass flow rate of the current alcohol solution, A is the alcohol content at the standard temperature, Q in is the volume flow rate of the current alcohol solution.

[0086] In order to ensure the accuracy of the measurement, the original images in the whole process, as well as the volume flow, alcohol meter reading, thermometer reading, and mass flow corresponding to any original image are stored as a set of data on the server for subsequent data analysis and processing.

[0087] For the alcohol mass flow online measurement method based on a single-capacity water tank device proposed in this embodiment, the volume flow measurement principle is the following dynamic equation:

[0088]

[0089] Where S is the bottom area of ​​the transparent alcohol solution, is the rate of change of the liquid level in the transparent alcohol container, μ1 is the volume flow coefficient, h1 is the liquid level of the alcohol solution in the original image, Q in is the volume flow rate of the alcohol solution, Q out is the outlet volume flow rate.

[0090] The present embodiment proposes an online measurement method for alcohol mass flow rate based on a single-capacity water tank device, which realizes real-time online measurement of the alcohol content, temperature and mass flow rate of an alcohol solution with a simple structure.

[0091] Example 2

[0092] This embodiment proposes an alcohol mass flow online measurement method based on a double-capacity water tank device, wherein the double-capacity water tank device, such as Figure 3 As shown, it includes: a first transparent alcohol container and a second transparent alcohol container containing an alcohol solution, a thermometer and N alcohol meters with different ranges located in the second transparent alcohol container, and a first image acquisition device and a second image acquisition device with shooting directions facing the first transparent alcohol container and the second transparent alcohol container respectively; after the alcohol solution flows into the first transparent alcohol container from the wine receiving bowl, part of it flows into the wine outlet main pipe from a first wine outlet arranged at the bottom of the first transparent alcohol container, and the other part flows into the second transparent alcohol container from a second wine outlet arranged at the bottom of the first transparent alcohol container, and the alcohol solution flowing into the second transparent alcohol container flows into the wine outlet main pipe from a third wine outlet arranged at the bottom of the second transparent container. During the process, the thermometer and all the alcohol meters can only float up and down with the change of the liquid level of the alcohol solution.

[0093] At preset intervals, the liquid level height of the alcohol solution in the first original image is obtained according to the first original image acquired by the first image acquisition device; the alcohol meter reading and the thermometer reading are obtained according to the second original image acquired by the second image acquisition device; the first original image includes the liquid level information of the alcohol solution in the first transparent alcohol container; the second original image includes the alcohol meter and thermometer information located inside the second transparent alcohol container;

[0094] According to the liquid level height of the alcohol solution in the first original image and the preset container volume flow parameter, and the preset formula three, the current volume flow of the alcohol solution is obtained; the container volume flow parameter includes a second volume flow coefficient and a volume flow constant;

[0095] The formula three is:

[0096] Q in =h2*(μ2+μ3)+a+b;

[0097] Among them, Q in is the current volume flow rate of the alcohol solution, h2 is the liquid level height of the alcohol solution in the first original image, μ2 and μ3 are the preset second volume flow coefficients, and a and b are the preset volume flow constants.

[0098] Among them, the second volume flow coefficient and the volume flow constant need to be calibrated in advance, and a known fixed flow liquid (second initial volume flow) is continuously added to the first transparent alcohol container. When the liquid levels of the two containers reach a steady state, the second steady-state image captured by the first image acquisition device and the third steady-state image captured by the second image acquisition device can be used to obtain the liquid level height of the alcohol solution in the second steady-state image and the liquid level height of the alcohol solution in the third steady-state image.

[0099] According to the liquid level height of the alcohol solution in the second steady-state image and the liquid level height of the alcohol solution in the third steady-state image, and the preset formula 4, a second volume flow coefficient and a volume flow constant are obtained;

[0100] The formula 4 is:

[0101]

[0102] in, is the preset second volume flow rate, h3 and h4 are the liquid level height in the second steady-state image and the liquid level height in the third steady-state image respectively, μ2 and μ3 are the second volume flow coefficients, and a, b and c are volume flow constants.

[0103] A plurality of experiments are performed using different second initial volume flow rates until a second volume flow coefficient and a volume flow constant are obtained.

[0104] In addition, according to the second original image, the readings of the N alcohol meters in the second original image are recorded, that is, R = {R1, R2, ..., R N} and the reading of the thermometer, select the reading that meets the range from the set R, and then traverse the preset conversion table according to the reading of the thermometer to obtain the corresponding alcohol content at the standard temperature.

[0105] According to the corresponding alcohol content at the standard temperature, the volume flow rate of the current alcohol solution and the preset formula 5, the mass flow rate of the current alcohol solution is obtained; the formula 5 is:

[0106]

[0107] Where W is the mass flow rate of the current alcohol solution, A is the alcohol content at the standard temperature, Q in is the volume flow rate of the current alcohol solution.

[0108] In order to ensure the accuracy of the measurement, the original images in the whole process, as well as the volume flow, alcohol meter reading, thermometer reading, and mass flow corresponding to any original image are stored as a set of data on the server for subsequent data analysis and processing.

[0109] For the alcohol mass flow online measurement method based on the double-capacity water tank device proposed in this embodiment, the volume flow measurement principle is as follows:

[0110]

[0111] Among them, Q in is the volume flow rate of the current alcohol solution to be measured, Q1 represents the volume flow rate from the first transparent alcohol container to the second transparent alcohol container, Q out1 and Q out2 are the volume flow rates of the alcohol solutions in the first transparent alcohol container and the second transparent alcohol container flowing into the wine outlet main pipe, h2 and h7 are the liquid level heights of the alcohol solutions in the first original image and the second original image, respectively. and are the change rates of the liquid level heights of the first transparent alcohol container and the second transparent alcohol container respectively, S1 and S2 are the bottom areas of the first transparent alcohol container and the second transparent alcohol container respectively, μ2, μ3, μ4 are the second volume flow coefficients, a, b and c are volume flow constants.

[0112] The present embodiment proposes an online measurement method for alcohol mass flow rate based on a double-capacity water tank device, which respectively realizes the measurement of alcohol volume flow rate and alcohol content. The alcohol volume flow rate is realized by the first transparent alcohol container, and the alcohol content is measured by the second transparent alcohol container. Compared with the expected online measurement method for alcohol mass flow rate realized by a single-capacity water tank device, the measurement range is larger and the measurement of alcohol content is more stable.

[0113] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0114] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0115] In the present invention, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0116] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0117] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An online measurement method for alcohol mass flow, the method is based on a transparent alcohol container and a camera set corresponding to the transparent alcohol container, characterized in that: The method comprises: S01-1. Obtaining the liquid level height of the alcohol solution in the first steady-state image according to the first steady-state image acquired by the image acquisition device; the first steady-state image includes liquid level information of the alcohol solution in the transparent alcohol container when the alcohol solution is continuously added to the transparent alcohol container based on a preset first initial volume flow rate until the liquid level in the transparent alcohol container reaches a steady state; S01-2, obtaining a first volume flow coefficient according to the liquid level height of the alcohol solution in the first steady-state image and a preset first initial volume flow rate, and a preset formula 2; The formula 2 is: Wherein, μ1 is the first volume flow coefficient, is the preset first initial volume flow rate, h0 is the liquid level height of the alcohol solution in the first steady-state image; S11, according to the original image captured by the image acquisition device, obtaining the liquid level height of the alcohol solution in the original image, the alcohol meter reading and the thermometer reading; the original image includes the liquid level information of the alcohol solution in the transparent alcohol container, and the alcohol meter and thermometer information located inside the transparent alcohol container; S12, according to the liquid level height of the alcohol solution in the original image and the preset container volume flow parameter, and the preset formula 1, obtain the current volume flow rate of the alcohol solution; the container volume flow parameter includes: the bottom area of ​​the transparent alcohol container, the liquid level height change rate and the first volume flow coefficient; The formula 1 is: Among them, Q in is the current volume flow rate of alcohol solution, S is the bottom area of ​​alcohol container, is the liquid level change rate, μ1 is the preset first volume flow coefficient, and h1 is the liquid level height of the alcohol solution in the original image; S13. Obtain the mass flow rate of the current alcohol solution according to the volume flow rate parameter of the container and the volume flow rate of the current alcohol solution, as well as the alcohol meter reading and the thermometer reading in the original image.

2. The method for online measurement of alcohol mass flow rate according to claim 1, characterized in that: The S13 includes: S13-1, according to the reading of the alcohol meter and the thermometer, traverse the preset conversion table to obtain the alcohol content corresponding to the reading of the alcohol meter at the standard temperature; S13-2, according to the alcohol content corresponding to the standard temperature, the volume flow rate of the current alcohol solution and the preset formula 5, the mass flow rate of the current alcohol solution is obtained; the formula 5 is: Where W is the mass flow rate of the current alcohol solution, A is the alcohol content at the standard temperature, Q in is the volume flow rate of the current alcohol solution.

3. The method for online measurement of alcohol mass flow rate according to claim 1, characterized in that: The alcohol meter comprises N alcohol meters with different measuring ranges, wherein N is a natural number not equal to 0; Then the S11 further includes: All alcohol meter readings in the original image are recorded, and according to the alcohol meter range corresponding to each alcohol meter reading, the reading that meets the corresponding alcohol meter range is selected as the final alcohol meter reading.

4. The method for online measurement of alcohol mass flow rate according to claim 1, characterized in that: The method further comprises: When the original image is captured by the image acquisition device to obtain the mass flow rate corresponding to the original image, the original image and the current volume flow rate, liquid level height of the alcohol solution, alcohol meter reading, thermometer reading and mass flow rate of the alcohol solution corresponding to the original image are saved as a group of data.

5. An alcohol mass flow online measurement method, the method is based on a transparent alcohol container and a camera set corresponding to the transparent alcohol container, characterized in that: The method comprises: S02-1. Obtaining the liquid level height of the alcohol solution in the second steady-state image according to the second steady-state image acquired by the first image acquisition device; obtaining the liquid level height of the alcohol solution in the third steady-state image according to the third steady-state image acquired by the second image acquisition device; The second steady-state image includes liquid level information of the alcohol solution in the first transparent alcohol container when the alcohol solution is continuously added to the transparent alcohol container based on a preset second initial volume flow rate until the liquid levels in the first transparent alcohol container and the second transparent alcohol container both reach a steady state; The third steady-state image includes liquid level information of the alcohol solution in the second transparent alcohol container when the alcohol solution is continuously added to the transparent alcohol container based on a preset second initial volume flow rate until the liquid levels in the first transparent alcohol container and the second transparent alcohol container both reach a steady state; S02-2, recording the second initial volume flow rate, the liquid level height in the second steady-state image, and the liquid level height in the third steady-state image as a set of process data; S02-3, determining whether a second volume flow coefficient and a volume flow constant can be obtained based on all process data and the preset formula 4; If not, the size of the second initial volume flow rate is changed and the process jumps to step S02-1 until the second volume flow coefficient and the volume flow constant are obtained according to all process data and the preset formula 4; The formula 4 is: in, is a preset second volume flow rate, h3 and h4 are respectively the liquid level height in the second steady-state image and the liquid level height in the third steady-state image, μ2 and μ3 are both second volume flow coefficients, and a, b and c are all volume flow constants; S11, obtaining a liquid level height of the alcohol solution in the first original image according to the first original image acquired by the first image acquisition device; obtaining an alcohol meter reading and a thermometer reading according to the second original image acquired by the second image acquisition device; The first original image includes liquid level information of the alcohol solution in the first transparent alcohol container; the second original image includes information of the alcohol meter and the thermometer located inside the second transparent alcohol container; The transparent alcohol container includes a first transparent alcohol container and a second transparent alcohol container; the image acquisition device includes a first image acquisition device and a second image acquisition device; S12, according to the liquid level height of the alcohol solution in the first original image and the preset container volume flow parameter, and the preset formula three, obtaining the current volume flow rate of the alcohol solution; the container volume flow parameter includes a second volume flow coefficient and a volume flow constant; The formula three is: Q in =h2*(μ2+μ3)+a+b; Among them, Q in is the current volume flow rate of the alcohol solution, h2 is the liquid level height of the alcohol solution in the first original image, μ2 and μ3 are the preset second volume flow coefficients, and a and b are the preset volume flow constants; S13. Obtain the mass flow rate of the current alcohol solution according to the volume flow rate parameter of the container and the volume flow rate of the current alcohol solution, as well as the alcohol meter reading and the thermometer reading in the original image.

6. The method for online measurement of alcohol mass flow rate according to claim 5, characterized in that: The S13 includes: S13-1, according to the reading of the alcohol meter and the thermometer, traverse the preset conversion table to obtain the alcohol content corresponding to the reading of the alcohol meter at the standard temperature; S13-2, according to the alcohol content corresponding to the standard temperature, the volume flow rate of the current alcohol solution and the preset formula 5, the mass flow rate of the current alcohol solution is obtained; the formula 5 is: Where W is the mass flow rate of the current alcohol solution, A is the alcohol content at the standard temperature, Q in is the volume flow rate of the current alcohol solution.

7. The method for online measurement of alcohol mass flow rate according to claim 5, characterized in that: The alcohol meter comprises N alcohol meters with different measuring ranges, wherein N is a natural number not equal to 0; Then the S11 further includes: All alcohol meter readings in the original image are recorded, and according to the alcohol meter range corresponding to each alcohol meter reading, the reading that meets the corresponding alcohol meter range is selected as the final alcohol meter reading.

8. The method for online measurement of alcohol mass flow rate according to claim 5, characterized in that: The method further comprises: When the original image is captured by the image acquisition device to obtain the mass flow rate corresponding to the original image, the original image and the current volume flow rate, liquid level height of the alcohol solution, alcohol meter reading, thermometer reading and mass flow rate of the alcohol solution corresponding to the original image are saved as a group of data.

9. An alcohol mass flow online measurement system, comprising a memory, a processor and a computer program stored in the memory, characterized in that: The processor executes the computer program to implement an alcohol mass flow online measurement method as described in any one of claims 1 to 4 or 5 to 8.

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