A kind of automatic bubble, automatic measuring soap film gas flow standard measuring device and method

Abstract

The application provides a kind of automatic foaming, automatic measuring soap film gas flow standard measuring device and method, belongs to gas flow measurement technical field.The device includes soap solution pool, soap film tube, film generating tube, connecting pipe, pipette and single-chip microcomputer and the like structure.Soap solution pool is used to store soap solution, soap film tube is installed above soap solution pool, film generating tube is used to generate and transmit soap film, pipette is used to accurately control liquid level in film generating tube, and single-chip microcomputer is used as control center, and is connected with each sensor and actuator in communication.The specific measurement process includes initial preparation, automatic wetting soap film tube wall, automatic measurement and continuous measurement and the like stage, by automatically controlling the generation, movement and rupture of soap film, combined with multi-sensor data, the gas flow is accurately measured, the error caused by manual operation and foam residue of traditional soap film flowmeter is avoided, and high-precision, high-efficiency gas flow measurement is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas flow measurement, in particular to a soap film gas flow standard measurement device and method with automatic foaming and automatic measurement. BACKGROUND

[0002] A soap film flowmeter is a soap film tube with upper and lower scales, the lower end of the soap film tube has a gas inlet, and the lowermost end of the soap film tube is a soap liquid holding device and a film forming device. An electronic soap film flowmeter has photoelectric sensors installed on the outer walls of the upper and lower scales of the soap film tube and is equipped with a display instrument.

[0003] In operation, gas enters the soap film tube from the gas inlet at the lower end of the soap film tube, and soap film is generated by the film forming device. The soap film is pushed by the entering gas medium and rises uniformly along the soap film tube. When the soap film rises to the lower scale line of the soap film tube, the lower limit photoelectric sensor detects a signal, and the timer starts timing. When the soap film rises to the upper scale line of the soap film tube, the upper limit photoelectric sensor detects a signal, and the timer stops timing. The instantaneous flow rate through the soap film flowmeter is calculated by data processing from the measured time and the volume between the two scale lines of the soap film tube, and the display instrument directly displays the instantaneous flow rate.

[0004] In the prior art, the design of the soap film flowmeter is generally that gas enters from the bottom of the soap film tube and pushes the soap film to move upward along the soap film tube. This downward movement direction makes the soap film maintain a certain shape during formation and rising due to the pushing action of the gas and the surface tension action of the liquid. However, once the bubbles break or are disturbed by external forces (such as the action of a large flow of gas), they will lose their original shape and become smaller bubbles or droplets and slide down along the inner wall of the soap film tube. When the bubbles contact the inner wall, they may stay on the inner wall due to adhesion. The bubbles adhering to the inner wall of the soap film tube change the contact state between the soap film and the inner wall and reduce the volume of the soap film tube, thereby affecting the movement speed and shape of the soap film, leading to errors in the detection of the photoelectric sensor when the soap film passes, and further affecting the accuracy of the flow measurement.

[0005] In addition, in the prior art, the film forming, measurement and data processing processes of the soap film flowmeter mostly rely on manual operation and cannot be automated. The lack of automatic film forming and measurement mechanism leads to low efficiency of the measurement process and is easily affected by human operation errors.

[0006] Therefore, it is of great significance to design a soap film gas flow standard measurement device and method with automatic foaming and automatic measurement to solve the above problems. SUMMARY

[0007] To solve the problems in the background art, the application provides a soap film gas flow standard measurement device with automatic foaming and automatic measurement, which comprises the following structures:

[0008] A soap solution pool is installed with a soap film tube and provided with a gas outlet.

[0009] The soap film tube is installed above the soap solution pool and is a vertical circular tube, with the bottom of the tube being communicated with the soap solution pool; the soap film tube is provided with upper and lower scale lines, and the two sides of the upper and lower scale lines are respectively installed with a first photoelectric sensor and a second photoelectric sensor to detect the time when the soap film passes and transmit the signal to a single-chip microcomputer.

[0010] A film generating tube is used to generate and transmit the soap film, and the film generating tube is provided with a soap film inlet tube, a first gas inlet, a liquid level detection tube and a liquid inlet in the internal cavity thereof; the liquid inlet is arranged at the lower end of the film generating tube; the liquid level detection tube is communicated with the internal cavity of the film generating tube and is used to monitor the position of the liquid level; a liquid level sensing device is installed on the liquid level detection tube at the same horizontal position as the soap film inlet to monitor the position of the liquid level in the film generating tube; after the gas enters the film generating tube through the first gas inlet, the gas pushes the soap film to rise from the soap film inlet tube.

[0011] A connecting tube is connected to the soap film channel of the film generating tube and the soap film tube to transmit the gas and the soap film from the film generating tube to the soap film tube.

[0012] A pipette is a pipetting device that can move the liquid level on the film generating tube up and down or stop the liquid level at a certain position, and the pipette is connected with a soap solution bottle below and connected with the liquid inlet of the film generating tube above; the pipette transmits the soap solution of the soap solution bottle to the film generating tube and makes the liquid level in the film generating tube quickly rise to the lower end surface of the soap film inlet tube or fall away from the soap film inlet tube, so that a soap film meeting the measurement requirements can be generated in the soap film inlet tube.

[0013] A single-chip microcomputer is in communication connection with the pipette, the liquid level sensing device, the first photoelectric sensor and the second photoelectric sensor, controls the start (up or down) and stop of the pipette according to the signal of the liquid level sensing device, and receives the signals of the first photoelectric sensor and the second photoelectric sensor to calculate the instantaneous flow.

[0014] The single-chip microcomputer, the pipette, the film generating tube and the liquid level sensing device are combined to complete the automatic film generating function.

[0015] In the preferred scheme, the bottom of the soap solution pool is provided with a liquid discharge port connected with the soap solution bottle, and a first valve is arranged on the connecting tube; the inside of the soap solution pool is installed with a temperature sensor, a pressure sensor and a moisture content sensor in communication connection with the single-chip microcomputer; the single-chip microcomputer receives the data of the temperature sensor, the pressure sensor and the moisture content sensor to convert the flow values in different states.

[0016] In the preferred scheme, the upper end of the film tube is made into a "T" shape, and a second gas inlet is provided, and a second valve is arranged at the second gas inlet; when the gas flow is large, the second valve is in the "open" state, so that part of the gas enters the film tube from the second gas inlet, thereby reducing the gas flow through the first gas inlet, and facilitating the formation of ideal soap film; when measuring the flow, the second valve is in the closed state.

[0017] In the preferred scheme, the single-chip microcomputer is communicatively connected with a display screen and a keyboard, the display screen displays the measurement results, including instantaneous flow, measurement time, temperature, and pressure data; and the keyboard is used to input operation instructions and set parameters.

[0018] The method for measuring the flow by using the automatic bubbling and automatic measuring soap film gas flow standard measuring device includes the following steps:

[0019] S1, initial preparation stage, check the film tube to ensure that the soap solution level in the film tube is kept below the soap film inlet tube and no soap film is formed;

[0020] S2, automatic wetting of the soap film tube wall stage, including:

[0021] S21, the pipette extracts the soap solution from the soap solution bottle and controls the liquid level in the film tube to rapidly rise to the lower end surface of the soap film inlet tube;

[0022] S22, the gas enters the film tube through the first gas inlet, and under the push of the gas, the soap solution generates a soap film at the soap film inlet tube of the film tube and moves along the film tube;

[0023] S23, wetting tube wall stage, the soap film moves in the soap film tube, and initially breaks in front of the successor, but as the soap solution is continuously supplied, the entire inner wall of the soap film tube is gradually wetted by the soap film (soap solution); until the complete soap film runs to the lower end of the soap film tube and breaks in the soap solution pool, the foam remains in the soap solution pool; at this time, the inner wall of the soap film tube is completely wetted, and the normal flow measurement stage can be entered.

[0024] S3, automatic measurement stage, including:

[0025] S31, the gas enters the film tube through the first gas inlet, the pipette extracts the soap solution from the soap solution bottle, and controls the liquid level in the film tube to rapidly rise to the lower end surface of the soap film inlet tube; after the liquid level sensing device installed on the liquid level detection tube detects the liquid level signal, the pipette is controlled by the single-chip microcomputer to rapidly drop away from the lower end surface of the soap film inlet tube, thereby forming a single complete soap film;

[0026] S32, the gas pushes the complete soap film to move along the film forming tube, passes through the connecting tube into the soap film tube, the soap film moves from top to bottom in the soap film tube until it moves to the lower end of the soap film tube and enters the soap solution pool, and the foam remains in the soap solution pool;

[0027] S33, when the soap film passes through the first photoelectric sensor, the sensor transmits the detected signal to the single-chip microcomputer, and the timer of the single-chip microcomputer starts timing; when the soap film continues to move to the second photoelectric sensor, the sensor transmits the signal to the single-chip microcomputer, and the timing stops;

[0028] S34, the single-chip microcomputer calculates the instantaneous flow of the gas flowing through the soap film flowmeter according to the motion time of the soap film between the first photoelectric sensor and the second photoelectric sensor and the volume between the two scale lines of the soap film tube;

[0029] S35, the single-chip microcomputer combines the data measured by the temperature sensor, the pressure sensor and the moisture content sensor to convert the flow in different states; the calculated instantaneous flow, temperature and pressure data are displayed through the display screen;

[0030] S4, continuous measurement, comprising:

[0031] Steps S31-S35 are repeated to continuously measure the flow.

[0032] In the preferred scheme, the specific process of step S31 is as follows:

[0033] The liquid level sensing device transmits the liquid level information to the single-chip microcomputer, and the single-chip microcomputer controls the pipettor to extract the soap solution from the soap solution bottle according to the liquid level information and inject the soap solution into the film forming tube; the pipettor controls the injection amount of the soap solution to make the liquid level in the film forming tube rise to the soap film inlet pipe, the liquid level sensing device detects the liquid level change and transmits the signal to the single-chip microcomputer, and the single-chip microcomputer stops the soap solution injection operation of the input device immediately, and reversely controls the pipettor to make the liquid level in the film forming tube drop rapidly to leave the soap film inlet pipe, so that the gas pushes the soap solution to form a complete soap film in the film forming tube, and multiple soap films are not continuously generated.

[0034] The beneficial effects achieved by the present application are:

[0035] The present application changes the traditional method of generating soap film by the cooperation of the input device and the liquid level sensing device, saves labor, and realizes the functions of automatic film forming and automatic measurement. The input device can accurately control the liquid level in the film forming tube to make it rise or drop rapidly, so as to generate or stop generating soap film. The liquid level sensing device monitors the liquid level change in real time to ensure that the liquid level is at the appropriate position, and avoids continuous generation of multiple soap films, which affects the measurement accuracy.

[0036] During the automatic measurement process, the photoelectric sensor detects the moment when the soap film passes through, and transmits the signal to the single-chip microcomputer. The single-chip microcomputer calculates the instantaneous flow rate according to the time when the soap film passes between the two photoelectric sensors and the volume of the soap film tube, and converts the flow rate in different states in combination with the data measured by the temperature sensor, pressure sensor and other sensors. Finally, the result is displayed on the display screen. This process is fully automated, reducing human operation errors and improving measurement accuracy and efficiency.

[0037] The present application ensures that the inside of the soap film tube is fully wetted by automatically wetting the wall of the soap film tube before measurement. The input device controls the rapid rise of the liquid level in the film-forming tube to the soap film inlet tube and maintains the liquid level stable, continuously generating multiple soap films until the entire pipeline is wetted. This process avoids soap film rupture caused by dryness inside the pipeline, ensuring the integrity and stability of the soap film during measurement.

[0038] The present application allows the foam accompanying the soap film or the foam formed after the soap film breaks to quickly flow into the soap solution pool under the action of gravity and the push of the next soap film, avoiding the formation of a covering layer on the inner wall of the soap film tube due to the foam staying there, which affects subsequent measurement. This design reduces the time waiting for the foam to slide down and also reduces the risk of mis-measurement.

[0039] The input device rapidly lowers the liquid level away from the soap film inlet tube after the soap film is formed, preventing the continuous generation of multiple soap films, further improving the accuracy and efficiency of measurement.

[0040] The present application automatically processes the data of the photoelectric sensor, temperature sensor, pressure sensor and moisture content sensor by the single-chip microcomputer, realizes the conversion of flow rate in different states, and displays the result on the display screen in real time, reducing human calculation errors and improving the accuracy and convenience of measurement. At the same time, it supports continuous measurement function and can work continuously for a long time, suitable for various measurement scenarios. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 is a schematic diagram of the overall structure of the present application.

[0042] Reference numerals in the figure:

[0043] 1, soap solution pool; 101, air outlet; 102, liquid outlet; 103, first valve; 2, soap film tube; 201, first photoelectric sensor; 202, second photoelectric sensor; 3, film-forming tube; 301, first air inlet; 302, liquid level detection tube; 303, liquid level sensing device; 304, soap film inlet tube; 305, liquid inlet; 4, connecting tube; 5, second valve; 6, second air inlet; 7, pipette; 8, soap solution bottle; 9, single-chip microcomputer; 10, atmospheric pressure sensor; 11, ambient temperature sensor; 12, display screen; 13, keyboard; 14, temperature sensor; 15, pressure sensor; 16, moisture content sensor. DETAILED DESCRIPTION

[0044] The technical solutions in the present application will be described clearly and completely below in combination with the drawings in the present application. In addition, the forms of the structures described in the following embodiments are only examples, and the present application is not limited to the structures described in the following embodiments. All other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application.

[0045] Referring to Figure 1 The detailed structural composition of the automatic bubbling and automatic measuring soap film gas flow standard measuring device of the present application is as follows:

[0046] The soap solution pool 1 is used to store soap solution and provide raw materials for the generation of soap film. The soap film tube 2 is installed on the soap solution pool 1, and an air outlet 101 is provided for discharging gas. The bottom of the soap solution pool 1 is provided with a liquid outlet 102 connected with the soap solution bottle 8 for facilitating the replacement or replenishment of soap solution.

[0047] The soap film tube 2 is installed above the soap solution pool 1 and is a vertical circular pipe in communication with the soap solution pool 1. The upper and lower scale lines are provided on the soap film tube 2 for measuring the height of the rising soap film to calculate the gas flow. The first and second photoelectric sensors 201 and 202 are respectively installed on both sides of the upper and lower scale lines for detecting the time when the soap film passes and transmitting the signal to the single-chip microcomputer 9.

[0048] The film generating tube 3 is used to generate and transmit soap film. The soap film inlet tube 304, the first air inlet 301, the liquid level detection tube 302 and the liquid inlet 305 are provided in the internal cavity of the film generating tube 3. The liquid inlet 305 is provided at the lower end of the film generating tube 3 and is connected with the liquid transfer device 7 for injecting soap solution into the film generating tube 3. The liquid level detection tube 302 is in communication with the internal cavity of the film generating tube 3 for monitoring the position of the liquid level. The liquid level sensing device 303 is installed on the liquid level detection tube 302 at the same horizontal position as the soap film inlet for monitoring the position of the liquid level in the film generating tube 3. After the gas enters the film generating tube 3 through the first air inlet 301, the soap film is pushed to rise from the soap film inlet tube 304.

[0049] The upper end of the film generating tube 3 is made into a "T" shape, and the second air inlet 6 is provided. The second valve 5 is provided at the second air inlet 6. When the gas flow is large, the second valve 5 is in the air passage state, so that part of the gas enters the soap film tube 2 from the second air inlet 6, thereby reducing the gas flow through the first air inlet 301, and it is easy to generate ideal soap film. When the flow is measured, the second valve 5 is in the closed state.

[0050] When the gas flow is large, by opening the second valve 5, part of the gas enters the soap film tube 2 from the second gas inlet 6, thereby reducing the gas flow through the first gas inlet 301. It helps to stabilize the generation process of soap film, avoids the rupture or instability of soap film due to excessive flow, ensures the accuracy and reliability of measurement.

[0051] When measuring flow, close the second valve 5, so that the gas enters the film tube 3 only through the first gas inlet 301, which facilitates accurate control of gas flow, generates soap film that meets measurement requirements, and improves measurement accuracy.

[0052] By controlling the opening and closing state of the second valve 5, the gas flow into the film tube 3 can be flexibly adjusted to adapt to different measurement requirements and scenarios. This design enables the device to handle a wider range of flow rates, enhancing the applicability and flexibility of measurement.

[0053] Under large flow conditions, the second gas inlet 6 can be used for preliminary flow adjustment and soap film generation; when measuring normally, close the second valve 5 to ensure the stability and accuracy of the measurement process. This mode switching function improves the measurement efficiency and adaptability of the device.

[0054] By reasonably distributing the gas flow, the instability of soap film and measurement error caused by excessive flow are avoided, improving the accuracy and reliability of measurement results. Under large flow conditions, the ideal soap film is quickly generated through the second gas inlet 6, reducing the preparation time before measurement and improving the measurement efficiency.

[0055] Connecting pipe 4, connecting pipe 4 is used to connect film tube 3 and soap film tube 2, forming a soap film channel to transport gas and soap film from film tube 3 to soap film tube 2.

[0056] Pipette 7, pipette 7 is a pipette device that can move the liquid level in the film tube 3 up and down or stop the liquid level at a certain position; below it is connected with soap liquid bottle 8, and above it is connected with the liquid inlet 305 of the film tube 3, used to transport the soap liquid in the soap liquid bottle 8 to the film tube 3; pipette 7 can accurately control the liquid level in the film tube 3, so that it quickly rises to the lower end surface of the soap film inlet pipe 304 or falls away from the soap film inlet pipe 304, thereby generating or stopping generating soap film.

[0057] Single-chip microcomputer 9, the single-chip microcomputer 9 is the control center of the whole device, and is in communication connection with the pipette 7, the liquid level sensing device 303, the first photoelectric sensor 201 and the second photoelectric sensor 202; the single-chip microcomputer 9 controls the start (up or down) and stop of the pipette 7 according to the signal of the liquid level sensing device 303; the single-chip microcomputer 9 receives the signals of the first photoelectric sensor 201 and the second photoelectric sensor 202, calculates the movement time of the soap film in the soap film tube 2, and calculates the instantaneous flow of the gas flowing through the soap film flowmeter in combination with the volume of the soap film tube 2; the single-chip microcomputer 9 also receives the data of the temperature sensor 14, the pressure sensor 15 and the moisture content sensor 16, converts the flow in different states, and displays the results on the display screen 12.

[0058] The temperature sensor 14, the pressure sensor 15 and the moisture content sensor 16 are installed in the inside upper part of the soap solution pool 1 and are in communication connection with the single-chip microcomputer 9, for measuring environmental parameters to provide a basis for flow conversion.

[0059] Display screen 12 and keyboard 13, the display screen 12 is used to display measurement results, including instantaneous flow, measurement time, temperature, pressure data, etc.; the keyboard 13 is used to input operation instructions and parameter settings, for the convenience of user operation.

[0060] In an automatic foaming and automatic measuring soap film gas flow standard measuring device, the connection relationship of each structure is as follows:

[0061] The soap solution pool 1 is located at the bottom of the device, serving as a storage and supply source of soap solution. The soap film tube 2 is installed above the soap solution pool 1 and is in communication with the inside of the soap solution pool 1 through the bottom of the soap film tube 2, allowing the soap film to flow back to the soap solution pool 1 after breaking. The bottom of the soap solution pool 1 is provided with a liquid outlet 102 connected with the soap solution bottle 8, for replenishing or replacing the soap solution. The soap film tube 2 is vertically installed above the soap solution pool 1 and is a circular pipeline, with the bottom directly communicating with the soap solution pool 1. The soap film tube 2 is provided with upper and lower scale lines for measuring the height of the rising soap film.

[0062] On both sides of the upper and lower scale lines, the first photoelectric sensor 201 and the second photoelectric sensor 202 are installed respectively for detecting the time when the soap film passes. The film generating tube 3 is located above the soap film tube 2 for generating and transmitting the soap film. The inside of the film generating tube 3 is provided with a soap film inlet tube 304, a first gas inlet 301, a liquid level detection tube 302 and a liquid inlet 305. The liquid inlet 305 is located at the lower end of the film generating tube 3 and is connected with the pipette 7, which transports the soap solution from the soap solution bottle 8 to the film generating tube 3. The liquid level detection tube 302 communicates with the inside of the film generating tube 3, and the liquid level sensing device 303 is installed thereon for monitoring the liquid level position in the film generating tube 3.

[0063] Gas enters the membrane tube 3 through the first gas inlet 301, pushing the soap film up from the soap film inlet tube 304. The connecting tube 4 connects the membrane tube 3 and the soap film tube 2, forming a soap film channel that allows the soap film and gas to smoothly enter the soap film tube 2 from the membrane tube 3. The pipette 7 is connected to the soap solution bottle 8 below and the liquid inlet 305 of the membrane tube 3 above. The pipette 7, under the control of the single-chip microcomputer 9, extracts and injects the soap solution from the soap solution bottle 8 into the membrane tube 3, accurately controlling the liquid level in the membrane tube 3.

[0064] The single-chip microcomputer 9 is the control center of the entire device, and is communicatively connected with the pipette 7, the liquid level sensing device 303, the first photoelectric sensor 201, the second photoelectric sensor 202, the temperature sensor 14, the pressure sensor 15, the moisture content sensor 16, the display screen 12, and the keyboard 13. The single-chip microcomputer 9 receives signals from the liquid level sensing device 303, controls the start and stop of the pipette 7, and controls the injection amount of the soap solution. The single-chip microcomputer 9 receives signals from the first photoelectric sensor 201 and the second photoelectric sensor 202, calculates the movement time of the soap film, and calculates the instantaneous flow rate in combination with the volume of the soap film tube 2. The single-chip microcomputer 9 also receives data from the temperature sensor 14, the pressure sensor 15, and the moisture content sensor 16, converts the flow rates in different states, and displays the results on the display screen 12.

[0065] The temperature sensor 14, the pressure sensor 15, and the moisture content sensor 16 are installed inside the soap solution pool 1 and are communicatively connected with the single-chip microcomputer 9, providing environmental parameter data. The display screen 12 is connected with the single-chip microcomputer 9 and is used to display measurement results. The keyboard 13 is connected with the single-chip microcomputer 9, allowing users to input operation instructions and parameter settings.

[0066] The single-chip microcomputer 9 is also connected with the ambient temperature sensor 11 and the atmospheric pressure sensor 10. The volume and density of gas change with temperature. According to the ideal gas state equation, at the same volume and pressure, an increase in temperature will cause a decrease in gas density, and vice versa. By measuring the ambient temperature, the single-chip microcomputer 9 can perform temperature compensation on the volumetric flow rate of the gas, thereby more accurately calculating the true flow rate of the gas. At different ambient temperatures, the formation and movement characteristics of the soap film may change. For example, at higher temperatures, the surface tension and viscosity of the soap solution may decrease, affecting the stability and movement speed of the soap film. The data provided by the ambient temperature sensor 11 can help the single-chip microcomputer 9 adjust the measurement parameters, ensuring the accuracy of the measurement results.

[0067] Changes in atmospheric pressure will affect the volume and density of gas. At different atmospheric pressures, the volumetric flow rate of the gas needs to be compensated accordingly. By measuring the atmospheric pressure, the single-chip microcomputer 9 can correct the gas flow rate according to the actual atmospheric pressure conditions, thereby improving the accuracy of the measurement. The data provided by the atmospheric pressure sensor 10 can help the single-chip microcomputer 9 adjust the measurement parameters, ensuring the accuracy of the measurement results.

[0068] Through the data measured by the ambient temperature sensor 11 and the atmospheric pressure sensor 10, the influence of temperature and pressure changes on gas flow is compensated, and the single-chip microcomputer 9 can more accurately calculate the real flow of the gas, thereby improving the accuracy and reliability of the entire measuring device.

[0069] The structures are tightly connected and communicate through pipes, connecting lines, sensors, and the single-chip microcomputer 9, etc., and work together to complete the automatic foaming and automatic measurement functions of the soap film gas flow measurement. The working process of the automatic foaming and automatic measurement soap film gas flow standard measuring device of the present application includes the following parts:

[0070] Initial preparation: Check the membrane tube 3 to ensure that the soap solution level and the soap film state meet the requirements.

[0071] Automatic wetting: Through the cooperation of the pipette 7 and the gas, the soap film is generated and the inner wall of the soap film tube 2 is wetted.

[0072] Soap film generation: Accurately control the liquid level to generate a complete soap film that meets the measurement requirements.

[0073] Soap film movement: The gas pushes the soap film to move stably in the soap film tube 2.

[0074] Photoelectric detection: The photoelectric sensor accurately detects the time when the soap film passes, and the single-chip microcomputer 9 counts the time.

[0075] Flow calculation: The single-chip microcomputer 9 calculates the instantaneous flow according to the time and volume data.

[0076] Data conversion: Combine the sensor data such as temperature, pressure, etc. to convert the flow.

[0077] Result display: Display the measurement results on the display screen 12, including instantaneous flow, temperature, pressure, etc.

[0078] Continuous measurement: Repeat the above steps to realize long-term continuous measurement.

[0079] Through the above series of automatic steps, the generation, movement and rupture of the soap film are realized, and the gas flow is accurately measured in combination with multiple sensor data. The following is the detailed and specific working process of the present application:

[0080] S1, initial preparation stage; check the membrane tube 3 to ensure that the soap solution level in the membrane tube 3 is kept below the soap film inlet tube 304, and no soap film is formed. This is to ensure the accuracy of the measurement and avoid initial errors.

[0081] S2, automatic wetting of the soap film tube 2 wall stage; step S21: the pipette 7 draws the soap solution from the soap solution bottle 8, and controls the liquid level in the film forming tube 3 to rise rapidly to the lower end face of the soap film inlet tube 304. This step is to ensure that there is enough soap solution in the film forming tube 3 to generate a soap film.

[0082] Step S22: gas enters the film forming tube 3 through the first gas inlet 301, and under the push of the gas, the soap solution generates a soap film at the soap film inlet tube 304 of the film forming tube 3 and moves along the film forming tube 3. At this time, the soap film begins to form and move upwards.

[0083] Step S23: wetting tube wall stage. When the soap film moves in the soap film tube 2, it may initially break, but as the soap solution continues to be supplied, the entire inner wall of the soap film tube 2 will gradually be wetted by the soap solution. Until the complete soap film runs to the lower end of the soap film tube 2 and breaks in the soap solution pool 1, the foam remains in the soap solution pool 1. By this time, the entire inner wall of the soap film tube 2 is wet, ready for subsequent flow measurement.

[0084] S3, automatic measurement stage; step S31: gas enters the film forming tube 3 again through the first gas inlet 301, and the pipette 7 draws the soap solution from the soap solution bottle 8 and controls the liquid level in the film forming tube 3 to rise rapidly to the lower end face of the soap film inlet tube 304. After the liquid level sensing device 303 detects the liquid level signal, the single-chip microcomputer 9 controls the pipette 7 to make the liquid level drop rapidly away from the lower end face of the soap film inlet tube 304, thereby forming a single complete soap film. This step ensures that only one soap film is generated each time, avoiding measurement errors caused by multiple soap films existing simultaneously.

[0085] Step S32: the gas pushes the complete soap film to move along the film forming tube 3, through the connecting tube 4 into the soap film tube 2. The soap film moves from top to bottom in the soap film tube 2 until it moves to the lower end of the soap film tube 2 and enters the soap solution pool 1, leaving the foam in the soap solution pool 1.

[0086] Step S33: when the soap film passes through the first photoelectric sensor 201, the sensor transmits the detected signal to the single-chip microcomputer 9, and the timer of the single-chip microcomputer 9 starts timing. When the soap film continues to move to the second photoelectric sensor 202, the sensor transmits the signal to the single-chip microcomputer 9, and the timing stops. This step accurately measures the time of the soap film passing through the soap film tube 2 by using the photoelectric sensor.

[0087] Step S34: the single-chip microcomputer 9 calculates the instantaneous flow of the gas flowing through the soap film flowmeter according to the movement time of the soap film between the first photoelectric sensor 201 and the second photoelectric sensor 202 and the volume between the two scale lines of the soap film tube 2. This step uses the moving speed of the soap film in the soap film tube 2 and the volume of the soap film tube 2 to calculate the instantaneous flow.

[0088] Step S35: The single-chip microcomputer 9 converts the data measured by the temperature sensor 14, the pressure sensor 15, and the moisture content sensor 16 according to different states. Since the volume and density of the gas change with the temperature, pressure, and moisture content, corresponding conversion is needed to obtain accurate flow rate values. The calculated instantaneous flow rate, temperature, and pressure data are displayed on the display screen 12 for the user to view.

[0089] S4, continuous measurement stage; steps S31 to S35 are repeated to perform continuous flow rate measurement. This step allows the user to continuously measure the gas flow rate for a long time, which is suitable for scenarios that require continuous monitoring of the gas flow rate.

[0090] The single-chip microcomputer 9 is also connected to the ambient temperature sensor 11 and the atmospheric pressure sensor 10. By measuring the ambient temperature and atmospheric pressure, the single-chip microcomputer 9 can perform temperature and pressure compensation on the gas flow rate, further improving the accuracy of the measurement. The single-chip microcomputer 9 is communicatively connected to the display screen 12 and the keyboard 13. The user can input operation instructions and parameter settings through the keyboard 13, while the measurement results are displayed on the display screen 12 for the user to view and record.

[0091] The automatic bubbling and automatic measurement soap film gas flow standard measurement device of the present application automatically controls the generation, movement, and rupture of the soap film, and accurately measures the gas flow rate by combining multiple sensor data, thereby avoiding the errors caused by manual operation and foam residue in traditional soap film flowmeters.

[0092] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A standard measuring device for automatically foaming and measuring the gas flow rate of a soap film, characterized in that, That Includes the following structure: A soap solution tank (1) is equipped with a soap film pipe (2) and an air outlet (101). The soap film tube (2) is installed above the soap liquid tank (1). The soap film tube (2) is a vertical circular pipe, and the bottom of the pipe is connected to the soap liquid tank (1). The soap film tube (2) is provided with an upper scale line and a lower scale line. A first photoelectric sensor (201) and a second photoelectric sensor (202) are installed on both sides of the upper scale line and the lower scale line respectively to detect the time when the soap film passes through and transmit the signal to the microcontroller (9). A film-forming tube (3) is used to generate and transport soap film. Inside the cavity of the film-forming tube (3), there are a soap film inlet tube (304), a first air inlet (301), a liquid level detection tube (302), and a liquid inlet (305). The liquid inlet (305) is located at the lower end of the film-forming tube (3). The liquid level detection tube (302) is connected to the inside of the film-forming tube (3) and is used to monitor the position of the liquid level. A liquid level sensing device (303) is installed on the liquid level detection tube (302) at the same level as the soap film inlet to monitor the position of the liquid level in the film-forming tube (3). After the gas enters the film-forming tube (3) through the first air inlet (301), it pushes the soap film upward from the soap film inlet tube (304). Connecting tube (4) connects the film-forming tube (3) and the soap film tube (2) through the soap film channel, and transports gas and soap film from the film-forming tube (3) to the soap film tube (2); The pipette (7) is a pipetting device that can move the liquid level up and down on the film-forming tube (3) or stop the liquid level at a certain position. It is connected to a soap bottle (8) at the bottom and connected to the inlet (305) of the film-forming tube (3) at the top. The pipette (7) delivers the soap solution from the soap bottle (8) to the film-forming tube (3) and makes the liquid level in the film-forming tube (3) rise rapidly to the lower end face of the soap film inlet tube (304) or fall away from the soap film inlet tube (304), so that a soap film that meets the measurement requirements can be generated in the soap film inlet tube (304). The microcontroller (9) is connected to the pipette (7), the liquid level sensing device (303), the first photoelectric sensor (201) and the second photoelectric sensor (202) for communication. The microcontroller (9) controls the pipette (7) to move the liquid level up, move the liquid level down and stop according to the signal of the liquid level sensing device (303), and receives the signals of the first photoelectric sensor (201) and the second photoelectric sensor (202) to calculate the instantaneous flow rate. The microcontroller (9), pipette (7), film-forming tube (3) and liquid level sensing device (303) are combined to complete the automatic film-forming process; The upper end of the film-forming tube (3) is made into a "T" shape and a second air inlet (6) is provided. A second valve (5) is provided at the second air inlet (6). When the gas flow rate is large, the second valve (5) is in the air-ventilated state, so that a part of the gas enters the soap film tube (2) from the second air inlet (6), thereby reducing the gas flow rate through the first air inlet (301) and making it easier to generate an ideal soap film. When the flow rate is measured, the second valve (5) is in the closed state.

2. The automatic foaming and automatic measurement standard measuring device for soap film gas flow rate according to claim 1, characterized in that, The bottom of the soap solution tank (1) is provided with a drain port (102), which is connected to the soap solution bottle (8), and a first valve (103) is provided on the connecting pipe (4); a temperature sensor (14), a pressure sensor (15) and a moisture content sensor (16) are installed inside the soap solution tank (1) and are connected to the microcontroller (9); the microcontroller (9) receives the data from the temperature sensor (14), the pressure sensor (15) and the moisture content sensor (16) and performs conversion of flow rates under different states.

3. The automatic foaming and automatic measurement standard measuring device for soap film gas flow rate according to claim 1, characterized in that, The microcontroller (9) is connected to a display screen (12) and a keyboard (13). The display screen (12) shows the measurement results, including instantaneous flow rate, measurement time, temperature and pressure data. The keyboard (13) is used to input operation commands and set parameters.

4. A method for measuring flow rate using an automatic foaming and automatic measuring soap film gas flow rate standard measuring device as described in any one of claims 1-3, characterized in that, It includes the following steps: S1. Initial preparation stage: Check the film-forming tube (3) to ensure that the soap solution level in the film-forming tube (3) is kept below the soap film inlet tube (304) and no soap film is formed; S2, Automatic Wetting of Soap Film Tube (2) Wall Stage, including: S21, The pipette (7) draws soap solution from the soap solution bottle (8) and controls the liquid level in the film-forming tube (3) to rise rapidly to the lower end of the soap film inlet tube (304); S22. Gas enters the film-forming tube (3) through the first air inlet (301). Under the push of the gas, soap solution generates a soap film in the soap film inlet tube (304) of the film-forming tube (3) and moves along the film-forming tube (3). S23, Wetting the tube wall stage: The soap film moves in the soap film tube (2). Initially, it will break one after another, but as the soap solution is continuously supplied, the entire inner wall of the soap film tube (2) will be gradually wetted by the soap film (soap solution); until the complete soap film runs to the lower end of the soap film tube (2) and breaks in the soap solution pool (1), and the foam remains in the soap solution pool (1); at this point, the inner wall of the soap film tube (2) is completely wetted, and the normal flow measurement stage begins. S3, Automatic Measurement Stage, including: S31. Gas enters the film-forming tube (3) through the first air inlet (301). The pipette (7) draws soap liquid from the soap liquid bottle (8) and controls the liquid level in the film-forming tube (3) to make it rise rapidly to the lower end face of the soap film inlet tube (304). After the liquid level sensing device (303) installed on the liquid level detection tube (302) detects the liquid level signal, it controls the pipette (7) through the microcontroller (9) to make the liquid level drop rapidly away from the lower end face of the soap film inlet tube (304), thereby forming a single complete soap film. S32. The gas pushes the complete soap film to move along the film-forming tube (3), and enters the soap film tube (2) through the connecting tube (4). The soap film moves from top to bottom in the soap film tube (2) until it moves to the lower end of the soap film tube (2) and enters the soap liquid pool (1). The foam remains in the soap liquid pool (1). S33. When the soap film passes the first photoelectric sensor (201), the sensor transmits the detected signal to the microcontroller (9), and the timer of the microcontroller (9) starts counting. When the soap film continues to move to the second photoelectric sensor (202), the sensor transmits the signal to the microcontroller (9), and the counting stops. S34. The microcontroller (9) calculates the instantaneous flow rate of the gas flowing through the soap film flow meter based on the movement time of the soap film between the first photoelectric sensor (201) and the second photoelectric sensor (202) and the volume between the two scale lines of the soap film tube (2). S35, the microcontroller (9) combines the data measured by the temperature sensor (14), pressure sensor (15) and moisture content sensor (16) to perform flow rate conversion under different conditions; the calculated instantaneous flow rate, temperature and pressure data are displayed on the display screen (12); S4. Continuous measurement, including: Repeat steps S31-S35 to perform continuous flow measurement.

5. The method according to claim 4, characterized in that, The specific process of step S31 is as follows: The liquid level sensor (303) transmits the liquid level information to the microcontroller (9). The microcontroller (9) controls the pipette (7) to draw soap solution from the soap solution bottle (8) and inject the soap solution into the film-forming tube (3) according to the liquid level information. The pipette (7) controls the injection volume of soap solution precisely so that the liquid level in the film-forming tube (3) rises to the soap film inlet tube (304). The liquid level sensor (303) detects the liquid level change and transmits the signal to the microcontroller (9). The microcontroller (9) then stops the soap solution injection operation of the input device and controls the pipette (7) in the opposite direction to make the liquid level in the film-forming tube (3) drop rapidly and leave the soap film inlet tube (304). Thus, the gas pushes the soap solution to form a complete soap film in the film-forming tube (3) instead of continuously generating multiple soap films.

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