Automatic adjustment method of mine pneumatic windscreen

Abstract

The present application relates to the technical field of coal mine ventilation, and particularly relates to an automatic adjusting method of a mine pneumatic air window, S1, initialization is performed, and a set value is acquired; S2, an initial adjusting coefficient is calculated; S3, a current actual air volume is acquired; S4, an air volume deviation is judged; S5, adjustment of an air window opening degree is performed; and S6, the adjusted actual air volume is acquired, and whether the adjusting coefficient needs to be corrected is judged through the adjusted air volume deviation. The present application has the beneficial effect that, compared with a traditional manual air measurement and manual adjustment mode, the adjusting efficiency of the air window is improved, and through real-time monitoring, the hysteresis of the manual adjustment mode is avoided. In the process of adjusting the air window, the adjusting coefficient can be corrected according to the actual adjusting effect, and through this self-correction, the effect of self-adaptation to external environment changes is achieved, thereby improving the adjusting efficiency of the air window, calibration is not needed in the use process, and the maintenance and use costs are reduced, and the present application is more intelligent.

Description

Technical Field

[0001] This invention relates to the field of coal mine ventilation technology, and in particular to an automatic adjustment method for a mine pneumatic ventilation window. Background Technology

[0002] Underground ventilation in coal mines is fundamental to coal mine safety and a crucial guarantee for safe production. With the development of mining technology and the increase in production capacity, the requirements for underground ventilation technology in coal mines are also becoming increasingly stringent. Underground ventilation in coal mines mainly relies on adjusting air windows and doors. However, the adjustment of underground air windows still primarily depends on continuous manual adjustment, such as manual airflow measurement and manual adjustment, which suffers from low efficiency, low accuracy, and lag. With the improvement of information technology, a trend towards automatic adjustment is gradually emerging. For example, Chinese invention patent CN113236335B discloses a PID control method for a mine-use louvered continuous adjustable air window and its branch airflow, controlled by a servo motor system. This belongs to electric air window adjustment. However, due to the superior explosion-proof performance and convenient power source of pneumatic actuators, pneumatic air windows have a wider range of applications. Chinese patent application number 202210902657.1 discloses a precise adjustment device and method for intelligent pneumatic ventilation windows in mines. In this method, the base time A for ventilation window adjustment is equal to 0.5a, where a is the time from fully closed to fully open. During adjustment, the ventilation window adjustment time t is equal to the product of the error coefficient c and the base time A. For a fixed airflow error c, such as adjusting from the current actual airflow of 60 Nm³ / min to the target airflow of 100 Nm³ / min, the ventilation window adjustment time t is only related to the base time A. However, if the external environment, such as the pressure of the power air source, changes, the base time A will not adaptively adjust accordingly, leading to potentially inappropriate adjustment time t, or requiring recalibration after changes in the external environment. Therefore, the adjustment effect and system efficiency need further improvement.

[0003] To address this issue, this application presents an automatic adjustment method for a mine pneumatic ventilation window to solve the aforementioned problems. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides an automatic adjustment method for a mine pneumatic ventilation window.

[0005] This invention is achieved through the following technical solution:

[0006] An automatic adjustment method for a mine pneumatic ventilation window, characterized by the following steps: S1, initialization and acquisition of set values; S2, calculation of initial adjustment coefficient; S3, acquisition of current actual air volume and calculation of air volume deviation; S4, judgment of air volume deviation; S5, adjustment of ventilation window opening; S6, acquisition of adjusted actual air volume and judgment of whether adjustment coefficient needs to be corrected based on adjusted air volume deviation.

[0007] Furthermore, to better realize the present invention, step S1 specifically involves obtaining the set maximum airflow range. This refers to the range of the airflow sensor that collects airflow in real time near the windshield, and the value is a non-negative number; the set full-range adjustment time is obtained. This refers to the time required for the vent to adjust from fully closed to fully open, and is a non-negative number; it also indicates the target airflow volume. This means gradually adjusting the vent to achieve a desired final airflow value that is non-negative; obtaining the set airflow threshold. The window is adjusted only when the deviation between the actual air volume and the target air volume exceeds this value. When the deviation between the actual air volume and the target air volume does not exceed this value, it is considered that the target range has been reached and the window does not need to be adjusted. This value is positive.

[0008] Furthermore, to better realize the present invention, S2 specifically refers to the initial adjustment coefficient. It represents the window adjustment time required to adjust the airflow by one unit under the current external environment.

[0009] Furthermore, to better realize the present invention, step S3 specifically involves obtaining the current actual airflow from the airflow sensor. And calculate the air volume deviation: This refers to the difference between the target air volume and the actual air volume; when the air volume deviation... When the value is positive, it indicates that the vent needs to be adjusted to increase the airflow; when the airflow deviation is... When the value is negative, it indicates that the window needs to be adjusted to reduce the airflow.

[0010] Furthermore, to better realize the present invention, step S4 specifically involves, if the absolute value of the airflow deviation... Less than or equal to the air volume threshold This includes cases where the airflow deviation is 0, indicating that no adjustment of the vent is needed. In this case, return to S3 to continue monitoring the actual airflow; if the absolute value of the airflow deviation is... greater than the air volume threshold This indicates that the windshield needs to be adjusted. Enter S5 to adjust the windshield opening.

[0011] Furthermore, to better realize the present invention, step S5 specifically involves first calculating the window adjustment time: This is the product of the absolute value of the airflow deviation and the adjustment coefficient; then, the airflow deviation is determined. Is it a positive or negative number, if the air volume deviation... If the value is positive, the forward rotation switch is turned on, causing the power air source to drive the vent opening to increase, the airflow to increase, and the timer to begin; if the airflow deviates... If the value is negative, the reverse switch is turned on, causing the power air source to drive the window opening to decrease, the air volume to begin to decrease, and the timer starts; finally, after the timer reaches the adjustment time t, the forward or reverse power air source is turned off, the window adjustment stops, and the opening no longer changes.

[0012] Furthermore, to better implement the present invention, step S6 specifically involves first obtaining the adjusted current actual airflow from the airflow sensor. And calculate the adjusted airflow deviation: Then, the deviation of the adjusted air volume is judged. If the absolute value of the adjusted air volume deviation is... Less than or equal to the air volume threshold This includes the case where the adjusted airflow deviation is 0, indicating that the airflow has reached the desired target range, the window adjustment is successful, and the adjustment coefficient f does not need to be corrected. At this point, return to S3 to continue monitoring the actual airflow; if the absolute value of the adjusted airflow deviation is... greater than the air volume threshold This indicates that the air volume has not yet reached the desired target range, and the adjustment coefficient f needs to be corrected. At this point, return to S3 and use the corrected adjustment coefficient f to further adjust the window opening.

[0013] Furthermore, to better realize the present invention, the specific steps of the modified adjustment coefficient f are as follows: firstly, calculate the new adjustment coefficient. Then use the new adjustment coefficient. Replacing the original adjustment coefficient f, it can be seen that, This represents the expected deviation in airflow before this adjustment. This represents the actual airflow deviation achieved after this adjustment; therefore, if Greater than This indicates that the adjustment time t was too short, resulting in a smaller window opening and the airflow deviation not meeting expectations. The adjusted coefficient will be greater than 1, thus increasing the adjustment time. In the next adjustment, if the external environment remains unchanged, it can be adjusted to the target range in one step. Less than This indicates that the adjustment time t was too long, causing the window opening to be adjusted too wide, resulting in an airflow deviation exceeding expectations. In this situation... The adjusted coefficient will be less than 1, thus reducing the adjustment time. In the next adjustment, if the external environment remains unchanged, the adjustment can be completed in one go to reach the target range.

[0014] The beneficial effects of this invention are:

[0015] (1) This invention proposes an automatic adjustment method for pneumatic ventilation windows used in mines. By acquiring the current actual air volume in real time and comparing it with the set target air volume, if the deviation exceeds the set air volume threshold, the opening of the ventilation window is automatically adjusted so that the actual air volume reaches the set air volume, thus achieving the effect of automatic adjustment. Compared with the traditional manual air volume measurement and adjustment method, this method improves the adjustment efficiency of the ventilation window and avoids the lag of manual adjustment method through real-time monitoring.

[0016] (2) In the process of adjusting the windshield, the present invention can correct the adjustment coefficient according to the actual adjustment effect. Through this self-correction, it can achieve the effect of adapting to changes in the external environment, thereby improving the adjustment efficiency of the windshield. No calibration is required during use, reducing maintenance and usage costs. The automatic adjustment of the pneumatic windshield is more intelligent. Attached Figure Description

[0017] Figure 1 This is a flowchart illustrating the automatic adjustment process of the pneumatic windshield of the present invention. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0020] Figure 1 As a specific embodiment of the present invention, this embodiment is an automatic adjustment method for a mine pneumatic ventilation window, the specific method is as follows:

[0021] (1) Perform initialization and obtain set values, including:

[0022] Get the set maximum airflow range This refers to the range of the airflow sensor that collects airflow in real time near the windshield, and it is a non-negative number.

[0023] Get the set full-range adjustment time This refers to the time required for the windshield to adjust from a fully closed state to a fully open state, and it is a non-negative number.

[0024] Get the set target air volume This means that the desired airflow value is achieved by gradually adjusting the window, and it is a non-negative number.

[0025] Get the set airflow threshold The window is adjusted only when the deviation between the actual air volume and the target air volume exceeds this value. When the deviation between the actual air volume and the target air volume does not exceed this value, it is considered that the target range has been reached and the window does not need to be adjusted. This value is positive.

[0026] (2) Calculate the initial adjustment coefficient: the initial adjustment coefficient It represents the window adjustment time required to adjust the airflow by one unit under the current external environment.

[0027] (3) Obtain the current actual air volume from the air volume sensor. And calculate the air volume deviation: This refers to the difference between the target air volume and the actual air volume; when the air volume deviation... When the value is positive, it indicates that the vent needs to be adjusted to increase the airflow; when the airflow deviation is... When the value is negative, it indicates that the window needs to be adjusted to reduce the airflow.

[0028] (4) Judgment of air volume deviation: Specifically, S4 is to determine if the absolute value of the air volume deviation is... Less than or equal to the air volume threshold This includes cases where the airflow deviation is 0, indicating that the window does not need to be adjusted. In this case, return to step (3) and continue monitoring the actual airflow; if the absolute value of the airflow deviation is... greater than the air volume threshold This indicates that the window needs to be adjusted. Proceed to step (5) to adjust the window opening.

[0029] (5) Adjusting the window opening: First, calculate the window adjustment time: This is the product of the absolute value of the airflow deviation and the adjustment coefficient; then, the airflow deviation is determined. Is it a positive or negative number, if the air volume deviation... If the value is positive, the forward rotation switch is turned on, causing the power air source to drive the vent opening to increase, the airflow to increase, and the timer to begin; if the airflow deviates... If the value is negative, the reverse switch is turned on, causing the power air source to drive the window opening to decrease, the air volume to begin to decrease, and the timer starts; finally, after the timer reaches the adjustment time t, the forward or reverse power air source is turned off, the window adjustment stops, and the opening no longer changes.

[0030] (6) Obtain the adjusted actual air volume and correct the adjustment coefficient f: First, obtain the adjusted current actual air volume from the air volume sensor. And calculate the adjusted airflow deviation: Then, the deviation of the adjusted air volume is judged. If the absolute value of the adjusted air volume deviation is... Less than or equal to the air volume threshold This includes cases where the adjusted airflow deviation is 0, indicating that the airflow has reached the desired target range, the window adjustment is successful, and the adjustment coefficient f does not need to be corrected. At this point, return to step (3) and continue monitoring the actual airflow; if the absolute value of the adjusted airflow deviation is... greater than the air volume threshold This indicates that the air volume has not yet reached the desired target range and the adjustment coefficient f needs to be corrected. At this point, return to step (3) and use the corrected adjustment coefficient f to further adjust the window opening.

[0031] The specific steps for correcting the adjustment coefficient f are as follows: First, calculate the new adjustment coefficient. Then use the new adjustment coefficient. Replace the original adjustment coefficient f; it can be seen that, This represents the expected deviation in airflow before this adjustment. This represents the actual airflow deviation achieved after this adjustment; therefore, if Greater than This indicates that the adjustment time t was too short, resulting in a smaller window opening and the airflow deviation not meeting expectations. The adjusted coefficient will be greater than 1, thus increasing the adjustment time. In the next adjustment, if the external environment remains unchanged, it can be adjusted to the target range in one step. Less than This indicates that the adjustment time t was too long, causing the window opening to be adjusted too wide, resulting in an airflow deviation exceeding expectations. In this situation... The adjusted coefficient will be less than 1, thus reducing the adjustment time. In the next adjustment, if the external environment remains unchanged, the adjustment can be completed in one go to reach the target range.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention, as long as they do not depart from the spirit and scope of the technical solutions of the present invention, should be covered within the scope of the claims of the present invention.

Claims

1. An automatic adjustment method for a mine pneumatic ventilation window, characterized in that, Includes the following steps: S1. Initialize and obtain the set value; S2. Calculate the initial adjustment coefficient; S3. Obtain the current actual air volume and calculate the air volume deviation; S4. Judge the air volume deviation; S5. Adjust the vent opening; S6. Obtain the adjusted actual air volume and determine whether the adjustment coefficient needs to be corrected based on the adjusted air volume deviation; S6 specifically involves first obtaining the adjusted current actual air volume from the air volume sensor. And calculate the adjusted airflow deviation: ,in, The target airflow is set; then, the deviation of the adjusted airflow is judged. If the absolute value of the adjusted airflow deviation is... Less than or equal to the air volume threshold This includes the case where the adjusted airflow deviation is 0, indicating that the airflow has reached the desired target range, the vent adjustment is successful, and the adjustment coefficient does not need to be corrected. In this case, return to S3 to continue monitoring the actual airflow; if the absolute value of the adjusted airflow deviation is... greater than the air volume threshold This indicates that the airflow has not yet reached the desired target range, and the adjustment coefficient f needs to be corrected. At this point, return to S3 and use the corrected adjustment coefficient f to further adjust the window opening. The specific steps for correcting the adjustment coefficient f are as follows: first, calculate the new adjustment coefficient... Then use the new adjustment coefficient. Replacing the original adjustment coefficient f shows that... This represents the expected deviation in airflow before this adjustment. This represents the actual airflow deviation achieved after this adjustment; therefore, if Greater than This indicates that the adjustment time t was too short, resulting in a smaller window opening and the airflow deviation not meeting expectations. The adjusted coefficient will be greater than 1, thus increasing the adjustment time. In the next adjustment, if the external environment remains unchanged, it can be adjusted to the target range in one step. Less than This indicates that the adjustment time t was too long, causing the window opening to be adjusted too wide, resulting in an airflow deviation exceeding expectations. In this situation... The adjusted coefficient will be less than 1, thus reducing the adjustment time. In the next adjustment, if the external environment remains unchanged, the adjustment can be completed in one go to reach the target range.

2. The automatic adjustment method for a mine pneumatic ventilation window according to claim 1, characterized in that: Specifically, S1 involves obtaining the set maximum airflow range. This refers to the range of the airflow sensor that collects airflow in real time near the windshield, and the value is a non-negative number; the set full-range adjustment time is obtained. This refers to the time required for the vent to adjust from fully closed to fully open, and is a non-negative number; it also indicates the target airflow volume. This means gradually adjusting the vent to achieve a desired final airflow value that is non-negative; obtaining the set airflow threshold. The window is adjusted only when the deviation between the actual air volume and the target air volume exceeds this value. When the deviation between the actual air volume and the target air volume does not exceed this value, it is considered that the target range has been reached and the window does not need to be adjusted. This value is positive.

3. The automatic adjustment method for a mine pneumatic ventilation window according to claim 1, characterized in that: Specifically, S2 refers to the initial adjustment coefficient. It represents the window adjustment time required to adjust the airflow by one unit under the current external environment.

4. The automatic adjustment method for a mine pneumatic ventilation window according to claim 1, characterized in that: Specifically, S3 involves obtaining the current actual airflow from the airflow sensor. And calculate the air volume deviation: This refers to the difference between the target air volume and the actual air volume; when the air volume deviation... When the value is positive, it indicates that the vent needs to be adjusted to increase the airflow; when the airflow deviation is... When the value is negative, it indicates that the window needs to be adjusted to reduce the airflow.

5. The automatic adjustment method for a mine pneumatic ventilation window according to claim 1, characterized in that: Specifically, S4 refers to, if the absolute value of the air volume deviation... Less than or equal to the air volume threshold This includes cases where the airflow deviation is 0, indicating that no adjustment of the vent is needed. In this case, return to S3 to continue monitoring the actual airflow; if the absolute value of the airflow deviation is... greater than the air volume threshold This indicates that the windshield needs to be adjusted. Enter S5 to adjust the windshield opening.

6. The automatic adjustment method for a mine pneumatic ventilation window according to claim 1, characterized in that: Specifically, S5 involves first calculating the window adjustment time: That is, the product of the absolute value of the air volume deviation and the adjustment coefficient; Then, determine the air volume deviation. Is it a positive or negative number, if the air volume deviation... If the value is positive, the forward rotation switch is turned on, causing the power air source to drive the vent opening to increase, the airflow to increase, and the timer to begin; if the airflow deviates... If the value is negative, the reverse switch is turned on, causing the power air source to drive the window opening to decrease, the air volume to begin to decrease, and the timer starts; finally, after the timer reaches the adjustment time t, the forward or reverse power air source is turned off, the window adjustment stops, and the opening no longer changes.

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