Quartz sand natural yard dust control system

Abstract

The present invention discloses a dust control system for natural stockyards of quartz sand, which relates to the technical field of quartz sand dust control. It includes a spraying range acquisition module, an intersection range acquisition module, an intersection punctuation acquisition module, a spray median line acquisition module, a deviation mark judgment module, and a spray control module. By judging each deviation mark corresponding to the control points on the spray median line one by one, the corresponding control strategy is obtained, so as to achieve the purpose of controlling the two-side atomizing spray devices according to the real-time driving state of the vehicle, effectively controlling the dust in the natural stockyard of quartz sand. By real-time monitoring the vehicle position and dynamically adjusting the spray devices in the corresponding directions, it ensures that the spray operation is started in time when needed, minimizes the dust pollution to the greatest extent, and avoids the situation that the spray devices are turned on simultaneously when the vehicle is within the intersection range, resulting in waste of water resources. While further improving the dust suppression effect, it achieves the purpose of efficient water conservation.

Description

Technical Field

[0001] The present invention relates to the technical field of quartz sand dust control, and particularly to a dust control system for a natural quartz sand yard. Background Art

[0002] When quartz stones are stacked outdoors in a yard, during the processes of mining, storing, and transporting quartz sand, due to reasons such as wind, vehicle driving, and human operation, there is a phenomenon of dust scattering. These dusts mainly come from links such as the crushing, loading, unloading, transportation, and storage of quartz sand. Dust will not only pollute the environment but also have an adverse impact on the health of surrounding residents. Long-term inhalation of these dusts may lead to respiratory diseases, coughing, and other health problems. Therefore, it is crucial to take effective measures to control and reduce the dust in the natural quartz sand yard.

[0003] A patent with the publication number CN109613866A discloses a dust monitoring system, which relates to the field of building construction. The aim is to solve the problem of large unnecessary water consumption in the existing dust reduction system, resulting in waste of water resources. The key points of its technical solution are as follows: It includes a detection device, a control device, and a dust reduction device. The detection device includes a dust sensor, the control device includes a local controller, and the dust reduction device includes a spray component. The construction site is divided into multiple dust areas. There are multiple spray components and dust sensors. The multiple spray components and dust sensors are respectively arranged in each dust area. The local controller presets a dust pollution range value. When the dust sensor feeds back the dust detection value to the local controller and it meets the dust pollution range value, the local controller controls the spray component in the dust area where the dust sensor is located to perform a spraying action. The dust monitoring system of this patent can be used for dust reduction on the construction site and save water.

[0004] However, when setting up high-definition cameras covering the entire yard, when a moving target appears, such as a truck transporting ore or a forklift transferring ore, the signal is transmitted to the control center. The control center, according to the position of the moving target captured by the camera, transmits the signal to a wide-angle atomizing spray device that can cover its position to perform point-to-point water spraying and dust suppression on its operation area. It does not consider that there is an overlap in the spraying ranges between the atomizing spray devices. When the moving target appears in the overlapping area, multiple atomizing spray devices will be triggered to operate simultaneously, resulting in waste of resources. Based on this, a dust control system for a natural quartz sand yard is proposed. Summary of the Invention

[0005] The object of the present invention is to provide a dust control system for natural quartz sand yards, which solves the technical problem that when the control center transmits a signal to a wide-angle atomizing sprinkler device that can cover the position of a moving target captured by a camera, and conducts point-to-point water spraying and dust suppression on its operation area, it does not consider the overlap of the spraying ranges between the atomizing sprinkler devices. When the moving target appears in the overlapping area, multiple atomizing sprinkler devices will be triggered to operate simultaneously, resulting in waste of resources.

[0006] The object of the present invention can be achieved by the following technical solutions:

[0007] A dust control system for natural quartz sand yards, comprising:

[0008] Spraying range acquisition module: Visualize the spraying area of each device in combination with the technical parameters of the atomizing sprinkler device;

[0009] Crossing range acquisition module: Analyze the overlapping part of the spraying ranges of two atomizing sprinkler devices in each spray pair to obtain the crossing range of each spray pair;

[0010] Crossing punctuation acquisition module: Take the center point of the crossing range of each spray pair as the crossing punctuation;

[0011] Spray median line acquisition module: Connect each crossing punctuation in sequence to obtain the spray median line, and at the same time take each crossing punctuation as a control point;

[0012] Deviation mark judgment module: Judge the position of the vehicle relative to each control point according to the real-time positioning of the vehicle, and generate corresponding deviation marks;

[0013] Spray control module: Control the corresponding side atomizing sprinkler device to turn on according to the deviation mark generated by the deviation mark judgment module;

[0014] The specific method for obtaining the crossing range corresponding to each spray pair is as follows;

[0015] First, define two atomizing sprinkler devices located at opposite positions as a spray pair, and then mark the overlapping range between the spraying ranges of the two atomizing sprinkler devices in each spray pair as the crossing range.

[0016] As a further solution of the present invention, the specific method for obtaining the crossing punctuation of the crossing range of each spray pair is:

[0017] Take the coordinates of the center point of the crossing range of each spray pair as the coordinates of its corresponding crossing punctuation, and then obtain the coordinates of the crossing punctuation corresponding to each spray.

[0018] As a further solution of the present invention, the specific method for obtaining the corresponding deviation mark of the vehicle relative to each control point is:

[0019] The deviation markers are a left deviation marker, a right deviation marker, and a neutral marker;

[0020] According to the real-time positioning of the vehicle, the real-time distance between the real-time positioning of the vehicle and the first control point in the vehicle traveling direction is obtained through a distance judgment formula. When the obtained real-time distance is less than a preset distance value, the coordinates (x3, y3) of the vehicle positioning point C are obtained;

[0021] If the median line is a straight line, the two endpoints A (x1, y1) and B (x2, y2) of the spray median line are used to define the vector AB at both ends of the spray median line. At the same time, the vector AC is constructed, and the cross product of the vector AB and the vector AC is calculated. If the cross product is greater than 0, a left deviation marker is generated; if the cross product is less than 0, a right deviation marker is generated; if the cross product is equal to 0, a neutral marker is generated. As the vehicle moves, the above steps are continuously executed to update the deviation markers corresponding to each control point.

[0022] As a further solution of the present invention, if the median line is a curve, the curve is divided into multiple stage lines, each section is constructed by endpoints D (x4, y4) and E (x5, y5). The stage line where the vehicle is located is found, the corresponding vector DC (x3 - x4, y3 - y4) is constructed, and the cross product r of the vector DE of this stage line and the vector DC is calculated. According to the value of the cross product r, the position of the vehicle positioning point C relative to the stage line is judged, and the corresponding deviation marker is generated. If the cross product is greater than 0, a left deviation marker is generated; if the cross product is less than 0, a right deviation marker is generated; if the cross product is equal to 0, a neutral marker is generated. As the vehicle moves, the above steps are continuously executed to update the deviation markers corresponding to each control point. For the last control point, it is analyzed with the stage line of which it is the end endpoint to determine the deviation marker generated for this control point.

[0023] As a further solution of the present invention, according to the deviation markers of each control point, the specific way to control the atomizing spray device on the corresponding side to start is as follows:

[0024] The left deviation marker controls the atomizing spray device located on the left side of the control point to start spraying operations. The right deviation marker controls the atomizing spray device located on the right side of the control point to start spraying operations. The neutral marker randomly controls the atomizing spray device on either the left or right side of the control point to start spraying operations.

[0025] As a further solution of the present invention, the specific way to obtain the real-time distance between the real-time positioning of the vehicle and the first control point in the vehicle traveling direction through a distance judgment formula is as follows:

[0026] Mark the coordinates of the first control point on the spray median line in the vehicle traveling direction as (Kx, Ky), and mark the real-time vehicle positioning as (Lx, Ly); calculate the real-time distance J between the real-time vehicle positioning and the first control point through the distance formula. When J is less than the preset distance value Y1, generate the coordinates of the vehicle positioning point C at this moment, otherwise do not process.

[0027] As a further solution of the present invention, the specific method for judging whether the spray median line is a straight line or a curve is as follows:

[0028] First, collect the coordinates corresponding to each control point on the spray median line, directly calculate the distance Fa between every two adjacent control points through the distance formula, obtain the discrete value U of the distance Fa. When U is less than or equal to the preset value Y2, it is judged that the spray median line is a straight line. When U is greater than the preset value Y2, it is judged that the spray median line is a curve.

[0029] As a further solution of the present invention, the specific method for obtaining the cross product of vectors AB and AC is: calculate the cross product r of AB and AC through r = (x2 - x1)(y3 - y1) - (y2 - y1)(x3 - x1).

[0030] The beneficial effects of the present invention:

[0031] In the present invention, by judging each deviation mark corresponding to each control point on the spray median line one by one, and then obtaining the corresponding control strategy, the purpose of controlling the two-side atomizing spray devices according to the real-time driving state of the vehicle is achieved, effectively controlling the dust in the natural yard of quartz sand. By real-time monitoring the vehicle position and dynamically adjusting the spray devices in the corresponding direction, it ensures that the spray operation is started in time when needed, minimizes the dust pollution to the greatest extent, and at the same time avoids the vehicle being within the intersection range and the spray devices being turned on simultaneously, resulting in waste of water resources. While further improving the dust suppression effect, the purpose of efficient water conservation is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention will be further described below with reference to the drawings.

[0033] Figure 1 is a schematic diagram of the system framework structure of the present invention;

[0034] Figure 2 is a schematic diagram of the spraying range and intersection range of the atomizing spray device of the present invention;

[0035] Figure 3 is a schematic diagram of the intersection punctuation and intersection punctuation within the intersection punctuation of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0036] Next, in combination with the accompanying drawings in the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] Embodiment 1

[0038] Please refer to Figures 1 - 3 As shown, the present invention is a dust control system for a natural quartz sand yard, including;

[0039] A spraying range acquisition module that obtains the spraying ranges respectively corresponding to each atomizing spray device;

[0040] Using a geographic information system or similar positioning technology, combined with technical parameters of the atomizing spray device such as spraying angle, spraying distance, etc., to determine the spraying range of each atomizing spray device;

[0041] Collect technical parameters of each atomizing spray device, such as spraying angle, spraying distance, flow rate, etc., and use a mathematical model or GIS tool to calculate the spraying range of each atomizing spray device based on the technical parameters and position information of the atomizing spray device. This is usually a circular or elliptical area, and then visually represent the spraying range of each atomizing spray device in a circular or elliptical shape to intuitively understand the spraying range of each device;

[0042] An intersection range acquisition module that defines two atomizing spray devices located at opposite positions as a spray pair, and obtains the intersection range respectively corresponding to each spray pair according to the spraying ranges respectively corresponding to each atomizing spray device. The specific method is;

[0043] Define two atomizing spray devices located at opposite positions as a spray pair, and then obtain multiple spray pairs. Obtain the overlapping range between the spraying ranges of the two atomizing spray devices in each spray pair, and mark it as the intersection range respectively corresponding to each spray pair;

[0044] It should be noted that: in the dust control system for a natural quartz sand yard, the "opposite positions" of the two atomizing spray devices at opposite positions usually refer to two devices that are geographically opposite in a natural quartz sand yard, that is, they are generally located on the same straight line. This layout is to ensure that the spraying ranges of the two devices can overlap, thereby forming an intersection range and covering a wider area. This arrangement helps to improve the dust reduction effect and ensure a wider and more uniform coverage area;

[0045] Cross punctuation acquisition module, taking the center point of the intersection range of each spray pair as its corresponding cross punctuation. The specific method is as follows:

[0046] Locate the center point of the intersection range of each spray pair in the geographic information system, obtain the coordinates of the center point of each spray pair as the coordinates of its corresponding cross punctuation, and then obtain the coordinates of the cross punctuation corresponding to each spray pair;

[0047] Spray median line acquisition module, connect the center points of each spray pair to obtain the spray median line. At the same time, take each center point as the corresponding control point on the spray median line, and take the coordinates of the cross punctuation corresponding to each center point as the coordinates corresponding to each control point on the spray median line. Mark the coordinates of each control point as Pi(XPi, YPi), where i represents the number of corresponding control points, and i≥1;

[0048] Deviation mark judgment module, according to the real-time positioning of the vehicle, determine whether it is on the left or right side of each control point, and generate the corresponding deviation mark for each control point. The deviation marks are left deviation mark, right deviation mark and neutral mark. The specific method for obtaining the corresponding deviation mark for each control point is as follows:

[0049] S1: According to the traveling direction of the vehicle, based on the real-time positioning of the vehicle, obtain the real-time distance between the vehicle and the first control point in the traveling direction through the distance judgment formula. When the real-time distance satisfies being less than the preset distance value, obtain the coordinates (x3, y3) of the vehicle positioning point C at this moment;

[0050] S2: Then judge the smoothness of the spray median line according to the dispersion degree of each control point on the spray median line, that is, judge whether the spray median line is a straight line or a curve. When it is judged that the spray median line is a straight line, obtain the vector of the spray median line according to the coordinates of the two end points of the spray median line. The specific method is as follows:

[0051] Mark the coordinates of the two end points of the spray median line as A(x1, y1) and B(x2, y2);

[0052] Take the vehicle positioning point C as the judgment point, construct vectors AC and AB, calculate the cross product r between AB and AC. When r>0, judge that point C is on the left side of the straight line AB, that is, on the left side of the spray median line, and then generate a left deviation mark at the corresponding control point. If r<0, judge that point C is on the right side of the straight line AB, that is, on the right side of the spray median line, and then generate a right deviation mark at the corresponding control point. If r = 0, judge that point C is on the straight line AB, that is, on the spray median line, and then generate a neutral mark at the corresponding control point;

[0053] The specific ways to construct vectors $\overrightarrow{AC}$ and $\overrightarrow{AB}$ are as follows: $\overrightarrow{AB}=(x2 - x1, y2 - y1)$, $\overrightarrow{AC}=(x3 - x1, y3 - y1)$;

[0054] The specific way to calculate the cross product of vectors $\overrightarrow{AB}$ and $\overrightarrow{AC}$ is: $r=(x2 - x1)(y3 - y1)-(y2 - y1)(x3 - x1)$;

[0055] When the median line of the spray is a curve, the line segment between every two adjacent control points of the median line of the spray is marked as a stage line;

[0056] According to the traveling direction of the vehicle and the real-time positioning of the vehicle, the distance between the vehicle and the first control point in the traveling direction of the vehicle is obtained through the distance judgment formula, and then the coordinates $(x3, y3)$ of the vehicle positioning point C at this moment are obtained;

[0057] Obtain the vector of the stage line with the first control point as the starting endpoint, mark the coordinates of the two endpoints of the stage line as $D(x4, y4)$ and $E(x5, y5)$, and construct vectors $\overrightarrow{DE}$ and $\overrightarrow{DC}$ through $\overrightarrow{DE}=(x5 - x4, y5 - y4)$ and $\overrightarrow{DC}=(x3 - x4, y3 - y4)$;

[0058] Take the vehicle positioning point C as the judgment point, calculate the cross product $r$ between $\overrightarrow{DE}$ and $\overrightarrow{DC}$ through $r=(x5 - x4)(y3 - y4)-(x3 - x4)(y5 - y4)$. When $r>0$, it is judged that point C is on the left side of the stage line, and then a left deviation mark is generated at the corresponding control point. If $r<0$, it is judged that point C is on the right side of the stage line, and then a right deviation mark is generated at the corresponding control point. If $r = 0$, it is judged that the point is on the stage line, that is, on the median line of the spray, and then a neutral mark is generated at the corresponding control point;

[0059] Through steps S1 - S2, the deviation marks corresponding to each control point are judged one by one. It should be noted that when the median line of the spray is a curve, for the last control point, the vector of the stage line with it as the ending endpoint is analyzed to determine and generate the deviation mark of this control point;

[0060] The spray control module controls the atomizing spray devices in the spray pairs corresponding to each control point according to the deviation marks corresponding to the vehicle at each control point. The left deviation mark controls the atomizing spray device on the left side of the control point to start spraying operation, the right deviation mark controls the atomizing spray device on the right side of the control point to start spraying operation, and the neutral mark randomly controls the atomizing spray device on either the left or right side of the control point to start spraying operation;

[0061] It should be noted that when setting the left and right sides of the spray median line, it is set based on the center line of the yard. When facing the center line of the yard, the left hand side is the left side and the right hand side is the right side;

[0062] Visualize the spraying area of each device by combining the technical parameters of the atomizing spray device, analyze and obtain the overlapping part of the spraying ranges of the two spray devices for each spray pair, obtain the cross range of each spray pair, take the center point of the cross range of each spray pair as the cross punctuation, connect each cross punctuation in sequence to obtain the spray median line. At the same time, take each cross punctuation as a control point, then judge the position of the vehicle relative to each control point according to the real-time vehicle positioning, and generate corresponding deviation marks. By judging each deviation mark corresponding to the control points on the spray median line one by one, the corresponding control strategy is obtained, so as to achieve the purpose of controlling the atomizing spray devices on both sides according to the real-time driving state of the vehicle, effectively control the dust in the natural yard of quartz sand, ensure that the spray operation is started in time when needed by real-time monitoring of the vehicle position and dynamically adjusting the spray devices in the corresponding direction, minimize the dust pollution to the greatest extent, avoid the spray devices on both sides being turned on simultaneously when the vehicle is within the cross range, resulting in waste of water resources, further improve the dust suppression effect, and achieve the purpose of high-efficiency water conservation.

[0063] Embodiment 2

[0064] As Embodiment 2 of the present invention, in the specific implementation of this application, compared with Embodiment 1, the difference between the technical solution of this embodiment and that of Embodiment 1 is only that in this embodiment,

[0065] The specific way to obtain the real-time distance between the vehicle and the first control point in the traveling direction through the distance judgment formula is as follows:

[0066] Mark the coordinates of the first control point on the spray median line in the vehicle traveling direction as (Kx, Ky), and mark the real-time vehicle positioning as (Lx, Ly);

[0067] Through the distance formula , calculate the real-time distance J between the real-time vehicle positioning and the first control point. When J is less than the preset distance value Y1, then generate and obtain the coordinates of the vehicle positioning point C at this moment, otherwise do not process;

[0068] Then the specific way to judge the smoothness of the spray median line according to the dispersion degree of each control point on the spray median line is as follows:

[0069] First, collect the coordinates Pi (XPi, YPi) corresponding to each control point on the median line of the spray. Calculate the distance Fa between every two adjacent control points directly through the distance formula, and obtain the discrete value U of the distance Fa. When U is less than or equal to the preset value Y2, it is determined that the median line of the spray is a straight line. When U is greater than the preset value Y2, it is determined that the median line of the spray is a curve;

[0070] It should be noted that the specific values of Y1 and Y2 are determined by relevant personnel according to actual needs. A smaller discrete value U indicates that the distribution of each control point on the median line of the spray is relatively stable and the median line is relatively smooth. On the contrary, it indicates that the distribution gap of each control point on the median line of the spray is relatively large and the median line is not smooth;

[0071] By judging whether the median line of the spray is smooth, a preliminary judgment is made on the driving road shape of the vehicle, and the curve and the straight line are discussed separately, so as to obtain the corresponding deviation marks for each control point, which is beneficial to minimizing dust pollution to the greatest extent while avoiding the simultaneous opening of the spray devices when the vehicle is within the intersection range, resulting in waste of water resources. While further improving the dust suppression effect, the purpose of efficient water conservation is achieved.

[0072] Embodiment III

[0073] As Embodiment III of the present invention, in the specific implementation of the present application, compared with Embodiment I and Embodiment II, the technical solution of this embodiment lies in the combined implementation of the solutions of the above Embodiment I and Embodiment II.

[0074] The above formulas are all calculated by taking the numerical values after removing the dimension. The formula is obtained by software simulation of a large amount of collected data to get a formula closest to the real situation. The preset parameters and threshold selection in the formula are set by those skilled in the art according to the actual situation.

[0075] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claimed rights.

Claims

1. Dust control system for natural stockyard of quartz sand, characterized in that, Including: Spraying range acquisition module: Visualize the spraying area of each device in combination with the technical parameters of the atomizing spraying device; Crossing range acquisition module: Analyze the overlapping part of the spraying ranges of two spraying devices in each spray pair to obtain the crossing range of each spray pair; Crossing punctuation acquisition module: Take the center point of the crossing range of each spray pair as the crossing punctuation; Spraying median line acquisition module: Connect each crossing punctuation in sequence to obtain the spraying median line, and at the same time use each crossing punctuation as a control point; Deviation mark judgment module: Judge the position of the vehicle relative to each control point according to the real-time positioning of the vehicle, and generate corresponding deviation marks; Spraying control module: Control the opening of the corresponding side atomizing spraying device according to the deviation mark generated by the deviation mark judgment module; The specific way to obtain the crossing range corresponding to each spray pair respectively is; First, define two atomizing spraying devices located at opposite positions as a spray pair, and then mark the overlapping range between the spraying ranges of the two atomizing spraying devices in each spray pair as the crossing range.

2. The quartz sand natural yard dust control system according to claim 1, wherein The specific way to obtain the crossing punctuation of the crossing range of each spray pair is: Take the coordinates of the center point of the crossing range of each spray pair as the coordinates of its corresponding crossing punctuation, and then obtain the coordinates of the crossing punctuation corresponding to each spray.

3. The quartz sand natural yard dust control system according to claim 2, characterized in that, The specific way to obtain the corresponding deviation mark of the vehicle relative to each control point is: The deviation marks are left deviation mark, right deviation mark and neutral mark; According to the real-time positioning of the vehicle, obtain the real-time distance between the real-time positioning of the vehicle and the first control point in the vehicle traveling direction through the distance judgment formula, and obtain the coordinates (x3, y3) of the vehicle positioning point C when the real-time distance is less than the preset distance value; If the median line is a straight line, use the two endpoints A (x1, y1) and B (x2, y2) of the spraying median line to define the vector AB at both ends of the spraying median line, and at the same time construct the vector AC, and calculate the cross product of the vector AB and the vector AC. If the cross product is greater than 0, generate a left deviation mark. If the cross product is less than 0, generate a right deviation mark. If the cross product is equal to 0, generate a neutral mark. As the vehicle moves, continuously execute the above steps to update the deviation marks corresponding to each control point.

4. The quartz sand natural yard dust control system according to claim 3, characterized in that, If the median line is a curve, divide the curve into multiple stage lines, each section is constructed by endpoints D (x4, y4) and E (x5, y5), find the stage line where the vehicle is located, construct the corresponding vector DC (x3 - x4, y3 - y4), and calculate the cross product r of the vector DE of this stage line and the vector DC. According to the value of the cross product r, judge the position of the vehicle positioning point C relative to the stage line, and generate corresponding deviation marks. If the cross product is greater than 0, generate a left deviation mark. If the cross product is less than 0, generate a right deviation mark. If the cross product is equal to 0, generate a neutral mark. As the vehicle moves, continuously execute the above steps to update the deviation marks corresponding to each control point. For the last control point, analyze it with the stage line of which it is the end point to determine the deviation mark generated for this control point.

5. The quartz sand natural yard dust control system according to claim 4, characterized in that, The specific way to control the opening of the corresponding side atomizing spraying device according to the deviation marks of each control point is: The left deviation mark controls the atomizing spray device located on the left side of the control point to start the spraying operation. The right deviation mark controls the atomizing spray device located on the right side of the control point to start the spraying operation. The neutral mark randomly controls the atomizing spray device located on either the left or right side of the control point to start the spraying operation.

6. The quartz sand natural yard dust control system according to claim 5, characterized in that, The specific method for obtaining the real-time distance between the real-time positioning of the vehicle and the first control point in the vehicle traveling direction through the distance judgment formula is as follows: Mark the coordinates of the first control point on the spray median line in the vehicle traveling direction as (Kx, Ky), and mark the real-time positioning of the vehicle as (Lx, Ly). Calculate the real-time distance J between the real-time positioning of the vehicle and the first control point through the distance formula. When J is less than the preset distance value Y1, generate the coordinates of the vehicle positioning point C at this moment; otherwise, no processing is performed.

7. The quartz sand natural yard dust control system according to claim 6, characterized in that, The specific method for determining whether the spray median line is a straight line or a curve is as follows: First, collect the coordinates corresponding to each control point on the spray median line, directly calculate the distance Fa between every two adjacent control points through the distance formula, obtain the discrete value U of the distance Fa. When U is less than or equal to the preset value Y2, it is determined that the spray median line is a straight line; when U is greater than the preset value Y2, it is determined that the spray median line is a curve.

8. The quartz sand natural yard dust control system according to claim 3, characterized in that, The specific method for obtaining the cross product of vectors AB and AC is as follows: Calculate the cross product r of AB and AC through r = (x2 - x1)(y3 - y1) - (y2 - y1)(x3 - x1).

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