A monitoring method for accurately measuring the air volume of a fan

Abstract

The present invention discloses a monitoring method for accurately measuring the air volume of a fan, comprising the following steps: Before monitoring the air volume of the fan, prepare a fan with the same power and the same cross-section for testing in advance, and it is necessary to conduct a pre-test inspection on the fan to ensure whether the fan is operating normally, measure the sizes of the air outlet and air duct of the fan, and record the working power and voltage of the fan in real time. Then, use two fans with the same power, air outlet size and air duct size to blow air into the closed pipe, so that the pressure sensor can detect the magnitude of the wind force and display it on the screen module, and record the numerical value again, thereby completing the data comparison and analysis of the air volume of the fan. According to the experimental data, calculate the air volume values of each fan and take the average value to reduce errors. The experimental steps are simple and convenient, and multiple groups of comparative experiments are carried out and the average value is taken to make the numerical value close to the actual situation.

Description

Technical Field

[0001] The present invention belongs to the technical field of fan air volume monitoring, and specifically relates to a monitoring method for accurately measuring the air volume of a fan. Background Technique

[0002] At present, two methods are generally adopted for measuring the actual operating air volume of the fan of the whole machine unit: measurement based on the differential pressure principle and measurement based on the wind speed cross-sectional area principle.

[0003] Wind speed refers to the distance that the wind flows through in a certain period of time; wind force refers to the magnitude of the force when the wind blows on an object. Wind speed has no grade level, while wind force has a grade division. Wind force is generally divided into grades according to wind speed. Generally speaking, the smaller the wind speed, the lower the wind force level, and the weaker the damage force of the wind. On the contrary, the larger the wind speed, the higher the wind force level, and the stronger the damage force of the wind. An instrument for measuring air flow velocity. There are many types of it. The most commonly used one in meteorological stations is the cup anemometer. It consists of an induction part composed of 3 parabolic cone-shaped empty cups fixed on a bracket at 120° to each other. The concave surfaces of the empty cups all face the same direction. The entire induction part is installed on a vertical rotating shaft. Under the action of wind force, the wind cups rotate around the shaft at a speed proportional to the wind speed. In the existing technology, the lack of multi-group comparison for data analysis easily causes errors, making the results of fan air volume monitoring not very consistent with the facts, greatly reducing the practicability of the equipment, and being unfavorable for actual application and operation. Summary of the Invention

[0004] The purpose of the present invention is to provide a monitoring method for accurately measuring the air volume of a fan in order to solve the above problems, and solve the problems mentioned in the background technique.

[0005] In order to solve the above problems, the present invention provides a technical solution:

[0006] A monitoring method for accurately measuring the air volume of a fan includes the following steps:

[0007] S1. Before monitoring the air volume of the fan, prepare fans with the same power and the same cross-section for testing in advance, and it is necessary to conduct a pre-test inspection on the fans to ensure whether the fans are operating normally;

[0008] S2. Measure the sizes of the air inlets and air ducts of the fan, and record the working power and voltage of the fan in real time;

[0009] S3. Then use two fans with the same power, the same air inlet size and the same air duct size to blow air into a closed pipe, so that the pressure sensor can detect the magnitude of the wind force and display it on the screen module, and record the values again to complete the data comparison and analysis of the fan air volume;

[0010] S4. According to the experimental data, calculate the air volume values of each fan and take the average value to reduce errors.

[0011] Preferably, the pre-test inspection steps for the fan in step S1 are as follows:

[0012] S11. Before the experiment, the same dimensions and frequencies of the experimental tools must be specified;

[0013] S12. Conduct a detailed pre-experiment inspection of the experimental tools to ensure the accuracy of the experimental data;

[0014] S13. Then place the inspected fan inside the windless chamber to prevent external wind from interfering with this experiment, thereby causing large errors in the experimental data.

[0015] Preferably, the specific operation steps for real-time recording of the working power and voltage of the fan in step S2 are as follows:

[0016] S21. Draw a recording form and record the dimensions of the fan air outlet and the fan power;

[0017] S22. Measure the dimensions of the fan air outlet using a highly accurate vernier caliper;

[0018] S23. Use an anemometer to calculate the wind speed at the fan air outlet;

[0019] S23. Then use the direct observation method to record the fan power and voltage.

[0020] Preferably, the specific operation steps for completing the data comparison and analysis of the fan air volume in step S3 are as follows:

[0021] S31. Place two fans with the same power, the same air outlet size, and the same duct size at one end of two closed pipes respectively to avoid external factors affecting the experimental data;

[0022] S32. Turn on the fans so that the fans blow towards one side of the pressure sensors. When the pressure sensors sense the pressure, then turn off the fans simultaneously. The processor will process the data of the two pressure sensors and present the values through the screen module;

[0023] S33. At this time, record the values in detail, then compare the two fans to avoid the generality of the experimental data, and then summarize and compare and analyze the experimental data.

[0024] Preferably, in step S3, the fan values are compared to be used for comparative analysis for subsequent fractional value calculation.

[0025] Preferably, the specific steps for calculating the air volume values of each fan in step S4 are as follows:

[0026] S41. If the fan's air volume is z, and the fan's duct cross-section is c, then the fan's wind speed is f;

[0027] S42. Then the air volume of the fan is z=fc.

[0028] The beneficial effects of the present invention are as follows: the present invention records and fills in a table various data of the fan according to the actual experimental conditions of the fan, summarizes the various data, calculates the air volume value of each fan, and conducts comparative experiments on multiple groups of fans, taking the average value to reduce errors. The experimental steps are simple, convenient and clear, so that the numerical values are close to the actual conditions, which greatly improves the practicability of monitoring and is conducive to practical applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] For ease of explanation, the present invention is described in detail with reference to the following specific implementations and accompanying drawings.

[0030] Figure 1 This is a flow chart of a monitoring method for accurately measuring the air volume of a fan according to the present invention;

[0031] Figure 2 This invention Figure 1 Schematic diagram of the method flow chart of S1. DETAILED DESCRIPTION

[0032] like Figure 1-2 As shown, this specific embodiment adopts the following technical solutions:

[0033] Example:

[0034] A monitoring method for accurately measuring the air volume of a fan comprises the following steps:

[0035] S1. Before monitoring the fan air volume, prepare a fan with the same power and cross-section for testing. The fan must be inspected before testing to ensure that it is operating normally, so as to ensure the authenticity of the subsequent comparison data.

[0036] S2. Measure the dimensions of the fan's air outlet and air duct, and record the fan's operating power and voltage in real time to ensure data accuracy.

[0037] S3. Use two fans with different powers, air outlet sizes, and air duct sizes to blow air into the closed pipe, so that the pressure sensor can detect the wind force and display it on the screen module. The value is recorded again, thereby completing the data comparison and analysis of the fan air volume and facilitating the acquisition of experimental data.

[0038] S4. Calculate the air volume value of each fan based on the experimental data and take the average value to reduce the error and avoid large errors that are detrimental to the experimental results.

[0039] Among them, the pre-test inspection steps for the fan in step S1 are as follows:

[0040] S11. Before the experiment, the same dimensions and frequencies of the experimental tools must be specified;

[0041] S12. Conduct a detailed pre-experiment inspection of the experimental tools to ensure the accuracy of the experimental data;

[0042] S13. Then place the inspected fan inside a windless chamber to prevent external wind from interfering with this experiment, thereby causing large errors in the experimental data.

[0043] Among them, the specific operation steps for real-time recording of the working power and voltage of the fan in step S2 are as follows:

[0044] S21. Draw a recording form and record the dimensions of the fan air outlet and the fan power;

[0045] S22. Use a high-precision vernier caliper to measure the dimensions of the fan air outlet;

[0046] S23. Use an anemometer to calculate the wind speed at the fan air outlet;

[0047] S24. Then use the direct observation method to record the fan power and voltage.

[0048] Among them, the specific operation steps for completing the data comparison and analysis of the fan air volume in step S3 are as follows;

[0049] S31. Place two fans with the same power, air outlet size, and duct size at one end of two closed pipes respectively to avoid external factors affecting the experimental data;

[0050] S32. Turn on the fans so that the fans blow towards one side of the pressure sensors. When the pressure sensors sense the pressure, then turn off the fans simultaneously. The processor will process the data of the two pressure sensors and present the values through the screen module;

[0051] S33. At this time, record the values in detail, then compare the two fans to avoid the generality of the experimental data, and then summarize and compare and analyze the experimental data.

[0052] Among them, in step S3, the fan values are compared to be used for comparative analysis for subsequent fractional value calculations, avoiding large errors and being outside the actual calculation range.

[0053] Among them, the specific steps for calculating the air volume values of each fan in step S4 are as follows:

[0054] S41. Set the air volume of the fan as z. If the cross-sectional area of the air duct of the fan is c, then the wind speed of the fan is f.

[0055] S42. Then the air volume of the fan is z = fc.

[0056] Specifically: In practical applications, before monitoring the air volume of the fan, the same dimensions and frequencies of the experimental tools must be specified, and the experimental tools must be carefully checked in advance to ensure the accuracy of the experimental data. Then, the inspected fan is placed inside the windless chamber to prevent external wind from interfering with this experiment, which may lead to large errors in the experimental data.

[0057] Then draw a record form and record the size of the fan air outlet and the fan power. A vernier caliper with high precision is required to measure the size of the fan air outlet. Then use an anemometer to calculate the wind speed at the fan air outlet, and use the direct observation method to record the fan power and voltage to ensure the authenticity of the subsequent data.

[0058] Then place two fans with the same power, the same air outlet size and the same air duct size at one end of two closed pipes respectively to avoid the influence of external factors on the experimental data. At the same time, turn on the fans so that the fans blow towards the side of the pressure sensor. When the pressure sensor senses the pressure, then turn off the fans at the same time. The processor will process the data of the two pressure sensors and present the values through the screen module. According to the experimental data, calculate the air volume values of each fan.

[0059] Set the air volume of the fan as z. If the cross-sectional area of the air duct of the fan is c, then the wind speed of the fan is f. Then the air volume of the fan is z = fc. Analyze and summarize the data of multiple comparative experiments and take the average value to reduce errors. The experimental steps are simple and convenient. By conducting multiple comparative experiments and then taking the average value, the obtained value is close to the actual situation, which is beneficial for practical applications.

[0060] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A monitoring method for accurately measuring the air volume of a fan, characterized in that The method includes the following steps: S1. Before monitoring the air volume of the fan, prepare a fan with the same power and the same cross-section for testing in advance, and conduct a pre-test inspection on the fan to ensure whether the fan is operating normally; S2. Measure the sizes of the air outlet of the fan and the air duct, and record the working power and voltage of the fan in real time; The specific operation steps are as follows: S21. Draw a record form and record the size of the air outlet of the fan and the fan power; S22. Measure the size of the air outlet of the fan using a vernier caliper with high precision; S23. Use an anemometer to calculate the wind speed at the air outlet of the fan; S24. Then use the direct observation method to record the fan power and voltage; S3. Then take two fans with the same power, the same air outlet size and the same air duct size to blow into the closed pipe, so that the pressure sensor can detect the wind force and display it on the screen module, and record the values again, so as to complete the data comparison and analysis of the air volume of the fan; The specific operation steps are as follows: S31. Place two fans with the same power, the same air outlet size and the same air duct size at one end of two closed pipes respectively to avoid external factors affecting the experimental data; S32. Turn on the fans so that the fans blow towards the side of the pressure sensor. When the pressure sensor senses the pressure, then turn off the fans at the same time. The processor will process the data of the two pressure sensors and present the values through the screen module; S33. At this time, record the values in detail, then compare the two fans to avoid the extensiveness of the experimental data, and then summarize and compare and analyze the experimental data; S4. According to the experimental data, calculate the air volume values of each fan and take the average value to reduce the error.

2. The monitoring method for accurately measuring the air volume of a fan according to claim 1, characterized in that The steps for pre-test inspection of the fan in S1 are as follows: S11. Before the experiment, the same size and frequency of the experimental tools must be specified; S12. Conduct a detailed pre-test inspection on the experimental tools to ensure the accuracy of the experimental data; S13. Then place the inspected fan inside the windless room to prevent external wind from interfering with this experiment, which may lead to large errors in the experimental data.

3. The monitoring method for accurately measuring the air volume of a fan according to claim 1, characterized in that, In S3, the fan values are compared to be used for comparative analysis for subsequent calculation of fractional values.

4. The monitoring method for accurately measuring the air volume of a fan according to claim 3, characterized in that, The specific steps for calculating the air volume values of each fan in S4 are as follows: S41. Set the air volume of the fan as z, the cross-section of the air duct of the fan as c, and the wind speed of the fan as f; S42. Then the air volume of the fan is z = fc.

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