A dust monitoring method during construction

Abstract

The present invention relates to the technical field of dust monitoring, and in particular to a dust monitoring method during construction, comprising: determining the initial dust core generation position under windless conditions according to dust concentration data obtained at a monitoring point; obtaining the degree of deviation of the unit wind force on the initial dust core generation position and the wind direction angles corresponding to each monitoring point according to the wind condition data obtained at the monitoring point, fusing the wind direction angles in the horizontal and vertical directions to obtain the horizontal fusion amount and the vertical fusion amount; adjusting the initial dust core generation position according to the horizontal fusion amount, the vertical fusion amount and the degree of deviation to obtain the target dust core generation position; obtaining real-time dust reduction power data according to the real-time dust concentration data at the target dust core generation position, and setting the power of the dust reduction device to the real-time dust reduction power data to perform dust reduction operations on the target dust core generation position. The present invention removes dust at the source of dust generation, and the dust removal effect is more significant.

Description

Technical Field

[0001] The invention relates to the technical field of dust monitoring, and in particular to a method for monitoring dust during a building construction process. Background Art

[0002] Construction sites generate a lot of dust due to activities such as the stacking of building materials, earth excavation, vehicle transportation and mortar mixing. This dust has become one of the important sources of urban air pollution. In order to ensure the environmental quality during construction, dust monitoring and dust reduction measures are usually implemented in parallel. Dust reduction equipment, such as dust reduction fog cannons, effectively reduce the dust content in the air by spraying water mist, while the dust monitoring system collects dust pollution data in real time and adjusts the direction and power of the dust reduction equipment accordingly to achieve the best dust reduction effect.

[0003] However, the measuring instruments in the dust monitoring system are often set up outdoors and can only provide information on dust concentration in local areas. The core pollution areas in construction are changeable, and the fixed-point measurement method is difficult to accurately capture these dynamic changes. In addition, wind factors will interfere with the static model's prediction of core pollution points, resulting in deviations between the prediction results and the actual results, which in turn affects the precise control of dust reduction equipment and reduces dust reduction efficiency. Summary of the invention

[0004] In order to solve the technical problem that the existing technology cannot accurately monitor the dust core generation position and accurately reduce dust, the purpose of the present invention is to provide a dust monitoring method during construction. The technical solution adopted is as follows:

[0005] The smallest circumscribed rhombus of the construction area is obtained as the area to be monitored, and each vertex of the area to be monitored is used as a monitoring point;

[0006] Determining the initial dust core generation location under windless conditions based on the dust concentration data obtained at the monitoring point;

[0007] According to the wind condition data obtained at the monitoring points, the influence degree of the unit wind force on the offset of the initial dust core generation position and the wind direction angles corresponding to each of the monitoring points are obtained, and the wind direction angles are fused horizontally and vertically to obtain the horizontal fusion amount and the vertical fusion amount;

[0008] The initial dust core generation position is adjusted according to the horizontal fusion amount, the vertical fusion amount and the offset influence degree to obtain a target dust core generation position;

[0009] Acquire real-time dust concentration data at the target dust core generation location, acquire real-time dust reduction power data based on the real-time dust concentration data, and set the power of the dust reduction device to the real-time dust reduction power data to perform dust reduction operations toward the target dust core generation location.

[0010] Furthermore, obtaining the minimum circumscribed rhombus of the construction area as the area to be monitored includes:

[0011] The convex hull method is used to perform a minimum circumscribed diamond operation on the construction area, and the minimum circumscribed diamond area is the area to be monitored.

[0012] Further, determining the initial dust core generation position under windless conditions according to the dust concentration data obtained at the monitoring point includes:

[0013] A two-dimensional coordinate model is constructed for the area to be monitored, in which the monitoring points are all located in the first quadrant and there are two monitoring points located on the coordinate axis of the two-dimensional coordinate model. The monitoring point located on the ordinate of the two-dimensional coordinate model is the first monitoring point, and the third monitoring point, the second monitoring point, and the fourth monitoring point are rotated clockwise.

[0014] Calculating the horizontal angle according to the dust concentration data of the monitoring point in the horizontal direction, and calculating the vertical angle according to the dust concentration data of the monitoring point in the vertical direction;

[0015] A mathematical relationship equation about x and y is established according to the horizontal angle and the vertical angle, wherein x is the distance between the initial dust core generation position and the first monitoring point, and y is the distance between the initial dust core generation position and the third monitoring point;

[0016] Solve the mathematical equation about x and y to get the value of x and the value of y;

[0017] The coordinates of the initial dust core generation position in the two-dimensional coordinate model are obtained according to the horizontal angle, the vertical angle, the x value, and the y value.

[0018] Further, the calculating the horizontal angle according to the dust concentration data of the monitoring point in the horizontal direction comprises:

[0019] The value of the third dust concentration data minus the fourth dust concentration data is used as the input value of the logic function, wherein the third dust concentration data is the dust concentration data monitored by the third monitoring point, and the fourth dust concentration data is the dust concentration data monitored by the fourth monitoring point;

[0020] The horizontal angle is obtained by subtracting the first preset value from the output value of the logic function and then multiplying the output value by the first preset angle.

[0021] Furthermore, the process of constructing the mathematical relationship equation about x and y includes:

[0022] In the area to be monitored, a first equation is constructed based on the dust concentration change rate on the right side of the horizontal component of the initial dust core generation position being equal to the dust concentration change rate on the left side;

[0023] In the area to be monitored, a second equation is constructed based on the dust concentration change rate above the vertical component of the initial dust core generation position being equal to the dust concentration change rate below;

[0024] In the triangle formed by the first monitoring point, the third monitoring point and the position where the initial dust core is generated, a third party formula is constructed according to the law of cosines.

[0025] Further, obtaining the coordinates of the initial dust core generation position according to the horizontal angle, the vertical angle, the x value, and the y value includes:

[0026] The first product of the value of x multiplied by the cosine value of the horizontal angle is used as the abscissa of the position where the initial dust core is generated;

[0027] The second product of the y value multiplied by the cosine value of the vertical angle is obtained, and the distance value between the third monitoring point and the fourth monitoring point minus the value of the second product is used as the ordinate of the position where the initial dust core is generated.

[0028] Furthermore, the process of obtaining the degree of influence of the unit wind force on the offset of the initial dust core generation position includes:

[0029] Obtaining the preset N historical coordinate positions of the initial dust core generation position before the current moment;

[0030] Respectively obtain the distance difference between the historical coordinate position at the j-1th moment and the historical coordinate position at the jth moment, wherein the value range of j is iN-1 to i, and i is the value at the current moment;

[0031] Obtaining the wind force averages of the N historical coordinate positions;

[0032] The offset influence degree is obtained by dividing the mean of the distance differences by the mean wind force.

[0033] Furthermore, the process of fusing the wind direction angle in the horizontal direction and the vertical direction to obtain the horizontal fusion amount and the vertical fusion amount includes:

[0034] The horizontal fusion amount is obtained by multiplying the cosine value of each wind direction angle by the corresponding wind force value and then adding them in sequence;

[0035] The vertical fusion amount is obtained by multiplying the sine value of each wind direction angle by the corresponding wind force value and then adding them in sequence.

[0036] Further, adjusting the initial dust core generation position according to the horizontal fusion amount and the vertical fusion amount to obtain the target dust core generation position includes:

[0037] Determine whether the horizontal fusion amount is greater than or equal to 0. If not, obtain the third product of the offset influence degree multiplied by the value of the horizontal coordinate of the initial dust core generation position, and subtract the value of the third product from the value of the horizontal coordinate of the initial dust core generation position as the value of the horizontal coordinate of the target dust core generation position. If yes, obtain the third product of the offset influence degree multiplied by the value of the horizontal coordinate of the initial dust core generation position, and add the value of the third product from the value of the horizontal coordinate of the initial dust core generation position as the value of the horizontal coordinate of the target dust core generation position.

[0038] Determine whether the vertical fusion amount is greater than or equal to 0. If not, obtain the fourth product of the offset influence degree multiplied by the value of the ordinate of the initial dust core generation position, and subtract the value of the fourth product from the value of the ordinate of the initial dust core generation position as the value of the ordinate of the target dust core generation position. If so, obtain the fourth product of the offset influence degree multiplied by the value of the ordinate of the initial dust core generation position, and add the value of the fourth product from the value of the ordinate of the initial dust core generation position as the value of the ordinate of the target dust core generation position.

[0039] Further, obtaining real-time dust reduction power data according to the real-time dust concentration data includes:

[0040] The value of the dust concentration data corresponding to the preset minimum dust reduction power is subtracted from the real-time dust concentration data as the input value of the exponential function;

[0041] The output value of the exponential function is multiplied by the preset minimum dust reduction power, and then added with the value of the preset minimum dust reduction power as the real-time dust reduction power data.

[0042] The present invention has the following beneficial effects:

[0043] In the present invention, first, the minimum circumscribed rhombus of the construction area is obtained as the area to be monitored, and each vertex of the area to be monitored is used as a monitoring point. The main purpose here is to determine the monitoring point to facilitate the subsequent acquisition of dust concentration data and wind condition data. The initial dust core generation position under windless conditions is determined according to the dust concentration data obtained at the monitoring point. The initial dust core generation position under windless conditions obtained here is used as the data basis for considering the target dust core generation position under windy conditions. According to the wind condition data obtained at the monitoring point, the degree of deviation of the unit wind force on the initial dust core generation position and the wind direction angle corresponding to each of the monitoring points are obtained, and the wind direction angle is fused in the horizontal and vertical directions to obtain the horizontal fusion amount and the vertical fusion amount. Obtaining the horizontal fusion amount and the vertical fusion amount is used to adjust the initial dust core generation position. The initial dust core generation position is adjusted according to the horizontal fusion amount, the vertical fusion amount and the degree of deviation to obtain the target dust core generation position. The target dust core generation position here is the dust core generation position finally determined, which takes into account the influence of wind force. The real-time dust concentration data at the target dust core generation position is obtained, and the real-time dust reduction power data is obtained according to the real-time dust concentration data. The power of the dust reduction device is set to the real-time dust reduction power data to perform dust reduction operations toward the target dust core generation position. The dust removal device directly moves toward the target dust core generation position and sets the power to the real-time dust reduction power data for dust removal. This is to perform dust removal operations at the source of dust generation, which can directly hit the core of the dust problem, thereby achieving a more significant dust removal effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0045] Figure 1 A flow chart of a dust monitoring method during construction provided by the first embodiment of the present invention;

[0046] Figure 2 A flow chart of a process for obtaining the initial dust core generation position provided by the second embodiment of the present invention;

[0047] Figure 3 A schematic diagram of a two-dimensional coordinate model provided in a third embodiment of the present invention;

[0048] Figure 4A schematic diagram of a horizontal angle and a vertical angle provided by a fourth embodiment of the present invention;

[0049] Figure 5 This is a flow chart of a process for obtaining the degree of influence of an offset provided in the fifth embodiment of the present invention. DETAILED DESCRIPTION

[0050] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following is a detailed description of the dust monitoring method in the construction process proposed by the present invention, its specific implementation method, structure, characteristics and effects, in combination with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0051] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0052] The following is a detailed description of a method for monitoring dust during construction provided by the present invention in conjunction with the accompanying drawings.

[0053] See also Figure 1 , which shows a flow chart of a dust monitoring method in a construction process provided by a first embodiment of the present invention. In the first embodiment, the method includes:

[0054] S101. Obtain the smallest circumscribed rhombus of the construction area as the area to be monitored, and use each vertex of the area to be monitored as a monitoring point.

[0055] The method of obtaining the minimum circumscribed diamond of the construction area as the area to be monitored includes:

[0056] The convex hull method is used to perform a minimum circumscribed diamond operation on the construction area, and the minimum circumscribed diamond area is the area to be monitored.

[0057] Specifically, the construction area is obtained according to the drawings of the building construction, and the convex hull method is used to perform the minimum circumscribed diamond operation on the construction area to obtain a diamond-shaped monitoring area. The diamond-shaped monitoring area corresponds to the real scene of the construction area to obtain the area to be monitored. The four vertices of the area to be monitored are set as monitoring points, and the instruments set at the monitoring points include: dust measuring instrument, anemometer and wind vane. The sampling frequencies of the instruments set at the monitoring points are all the same.

[0058] S102. Determine the initial dust core generation position under windless conditions according to the dust concentration data obtained at the monitoring point.

[0059] In the absence of wind, the dust diffusion path is from the dust generation center to the surrounding areas. In the horizontal direction parallel to the ground, the dust generally spreads evenly in all directions. In the vertical direction of the ground, due to the influence of gravity, there will be a certain amount of deposition and decline. Therefore, the farther away from the dust generation center, the lower the measured dust concentration. It is generally believed that the speed of dust falling to the surrounding areas is consistent, and the relationship between distance and dust concentration is a linear relationship.

[0060] After the dust diffuses from the pollution source, it continues to settle. Therefore, the farther away from the core pollution location, the lower the dust concentration data, and the closer the dust concentration data, the higher the dust concentration data. Therefore, the degree of proximity of the dust core generation location can be obtained through the difference in dust measurement data in the horizontal direction and the vertical direction, thereby obtaining the deviation angle of the initial dust core generation location, and then obtaining the initial dust core generation location.

[0061] The dust concentration data is obtained by a dust measuring instrument arranged at the monitoring point.

[0062] The process of obtaining the initial dust core generation position will be described in detail in the second embodiment and will not be repeated here.

[0063] S103. Obtain the influence of unit wind force on the offset of the initial dust core generation position and the wind direction angles corresponding to each of the monitoring points according to the wind condition data obtained at the monitoring points, and fuse the wind direction angles in the horizontal and vertical directions to obtain the horizontal fusion amount and the vertical fusion amount.

[0064] Generally, construction sites are located outdoors, and it is difficult to have a completely wind-free environment. Therefore, the impact of wind on dust needs to be considered. Existing data show that as time goes by, the diffusion speed of dust in the horizontal direction will gradually approach the wind speed, and at 0 The speed of diffusion is very fast within 0.2s. In the absence of wind interference, dust diffuses vertically upward and slowly diffuses horizontally to the surroundings, and the rate of horizontal diffusion to the surroundings is basically the same. When there is a wind force affecting the diffusion of dust, the dust measuring instrument in the windward direction will measure a larger dust pollution concentration, and the dust measuring instrument against the wind will measure a smaller dust pollution.

[0065] The angle between the wind vector and the positive direction of the x-axis is set as the wind direction angle, and its magnitude is , and the counterclockwise direction is the positive direction of the angle. Affected by the wind, the initial dust core generation position will be offset and offset along the direction of the wind.

[0066] The process of obtaining the offset influence degree will be described in detail in the third embodiment and will not be repeated here.

[0067] The wind condition data includes: wind force data and wind direction data. The wind force data is obtained by an anemometer arranged at the monitoring point, and the wind direction data is obtained by a wind vane arranged at the monitoring point.

[0068] The process of obtaining the wind direction angle includes:

[0069] A wind vector may be obtained according to the wind force data and the wind direction data.

[0070] It can be seen that the wind vector includes: wind value and wind direction.

[0071] The wind force vector is divided into a horizontal component in the horizontal direction and a vertical component in the vertical direction.

[0072] That is to say, the wind force vector is decomposed in the horizontal direction and the vertical direction.

[0073] The arc tangent value of the vertical component divided by the horizontal component is the wind direction angle.

[0074] The wind direction angle can be expressed as: , wherein the arctan is the inverse tangent function, the h is the vertical component, and the g is the horizontal component.

[0075] In this way, four wind direction angles can be obtained corresponding to the four monitoring points.

[0076] Furthermore, the process of fusing the wind direction angle in the horizontal direction and the vertical direction to obtain the horizontal fusion amount and the vertical fusion amount includes:

[0077] The cosine value of each wind direction angle is multiplied by the corresponding wind force value and then added in sequence to obtain the horizontal fusion amount, wherein the horizontal fusion amount can be expressed as:

[0078] ;

[0079] Among them, the represents the horizontal fusion amount, the represents the wind direction angle of the i-th monitoring point, represents the cosine function, Represents the wind force value at the i-th monitoring point, where i represents the number of the monitoring points and has a value of 1 to 4.

[0080] The vertical fusion amount is obtained by multiplying the sine value of each wind direction angle by the corresponding wind force value and then adding them in sequence, wherein the vertical fusion amount can be expressed as:

[0081] ;

[0082] Among them, the represents the vertical fusion amount, the represents the wind direction angle of the ith monitoring point, sin represents a sine function, Represents the wind force value at the i-th monitoring point, where i represents the number of the monitoring points and has a value of 1 to 4.

[0083] S104. Adjust the initial dust core generation position according to the horizontal fusion amount, the vertical fusion amount and the offset influence degree to obtain the target dust core generation position.

[0084] Specifically, adjusting the initial dust core generation position according to the horizontal fusion amount and the vertical fusion amount to obtain the target dust core generation position includes:

[0085] Determine whether the horizontal fusion amount is greater than or equal to 0. If not, obtain the third product of the offset influence degree multiplied by the value of the horizontal coordinate of the initial dust core generation position, and subtract the value of the third product from the value of the horizontal coordinate of the initial dust core generation position as the value of the horizontal coordinate of the target dust core generation position. If yes, obtain the third product of the offset influence degree multiplied by the value of the horizontal coordinate of the initial dust core generation position, and add the value of the third product from the value of the horizontal coordinate of the initial dust core generation position as the value of the horizontal coordinate of the target dust core generation position.

[0086] The process of obtaining the value of the horizontal coordinate of the target dust core generation position can be expressed by the formula:

[0087] ;

[0088] Among them, the represents the value of the horizontal coordinate of the target dust core generation position, Indicates the degree of influence of the offset. represents the value of the abscissa of the position where the initial dust core is generated, Indicates the amount of horizontal fusion.

[0089] Determine whether the vertical fusion amount is greater than or equal to 0. If not, obtain the fourth product of the offset influence degree multiplied by the value of the ordinate of the initial dust core generation position, and subtract the value of the fourth product from the value of the ordinate of the initial dust core generation position as the value of the ordinate of the target dust core generation position. If so, obtain the fourth product of the offset influence degree multiplied by the value of the ordinate of the initial dust core generation position, and add the value of the fourth product from the value of the ordinate of the initial dust core generation position as the value of the ordinate of the target dust core generation position.

[0090] The process of obtaining the value of the ordinate of the target dust core generation position can be expressed by the formula:

[0091] ;

[0092] Among them, the represents the value of the ordinate of the target dust core generation position, Indicates the degree of influence of the offset. represents the value of the ordinate of the position where the initial dust core is generated, Represents the vertical fusion amount.

[0093] S105. Obtain real-time dust concentration data at the target dust core generation location, obtain real-time dust reduction power data based on the real-time dust concentration data, and set the power of the dust reduction device to the real-time dust reduction power data to perform dust reduction operations toward the target dust core generation location.

[0094] Acquiring real-time dust reduction power data according to the real-time dust concentration data includes:

[0095] The value of the dust concentration data corresponding to the preset minimum dust reduction power is subtracted from the real-time dust concentration data as the input value of the exponential function;

[0096] The output value of the exponential function is multiplied by the preset minimum dust reduction power, and then added with the value of the preset minimum dust reduction power as the real-time dust reduction power data.

[0097] The real-time dust reduction power data can be expressed by the formula:

[0098] ;

[0099] Among them, the represents the real-time dust reduction power data, the represents the preset minimum dust suppression power, the represents the real-time dust concentration data, the represents the dust concentration data corresponding to the preset minimum dust suppression power, represents the exponential function.

[0100] Figure 2 A flow chart of the initial dust core generation position provided in the second embodiment of the present invention. In the second embodiment, determining the initial dust core generation position under windless conditions according to the dust concentration data obtained at the monitoring point includes:

[0101] S201. Construct a two-dimensional coordinate model for the area to be monitored. In the two-dimensional coordinate model, the monitoring points are all located in the first quadrant and there are two monitoring points located on the coordinate axis of the two-dimensional coordinate model. The monitoring point located on the vertical coordinate of the two-dimensional coordinate model is the first monitoring point, and rotating clockwise there are the third monitoring point, the second monitoring point, and the fourth monitoring point.

[0102] Figure 3 A schematic diagram of a two-dimensional coordinate model provided in the third embodiment of the present invention. In the third embodiment, the two-dimensional coordinate model can refer to Figure 3 .

[0103] S202. Calculate the horizontal angle according to the dust concentration data of the monitoring point in the horizontal direction, and calculate the vertical angle according to the dust concentration data of the monitoring point in the vertical direction.

[0104] Specifically, calculating the horizontal angle according to the dust concentration data of the monitoring point in the horizontal direction includes:

[0105] The value of the third dust concentration data minus the fourth dust concentration data is used as the input value of the logic function, wherein the third dust concentration data is the dust concentration data monitored by the third monitoring point, and the fourth dust concentration data is the dust concentration data monitored by the fourth monitoring point;

[0106] The horizontal angle is obtained by subtracting the first preset value from the output value of the logic function and then multiplying the output value by the first preset angle.

[0107] The horizontal angle can be expressed by the formula:

[0108] ;

[0109] Among them, the represents the horizontal angle, the is the first preset angle, preferably , represents the third dust concentration data, the represents the fourth dust concentration data, the r represents the first preset value, preferably 0.5, the represents the logic function.

[0110] Specifically, calculating the vertical angle according to the dust concentration data of the monitoring point in the vertical direction includes:

[0111] The value of subtracting the second dust concentration data from the first dust concentration data is used as an input value of the logic function, wherein the first dust concentration data is the dust concentration data of the first monitoring point in the horizontal direction, and the second dust concentration data is the dust concentration data of the second monitoring point in the horizontal direction;

[0112] The vertical angle is obtained by subtracting the second preset value from the output value of the logic function and then multiplying the output value by the second preset angle.

[0113] The vertical angle can be expressed by the formula:

[0114] ;

[0115] Among them, the represents the vertical angle, the is the second preset angle, preferably , represents the first dust concentration data, the represents the second dust concentration data, the represents the second preset value, preferably 0.5, represents the logic function.

[0116] Figure 4 Schematic diagram of horizontal angle and vertical angle provided by the fourth embodiment of the present invention. In the fourth embodiment, please refer to Figure 4 .

[0117] in, , , , They represent the first monitoring point, the second monitoring point, the third monitoring point, and the fourth monitoring point respectively. Indicates the initial dust core generation position and The angle between the straight lines is The angle above the straight line is positive. The angle below the line is negative; Indicates the initial dust core generation position and The angle between the straight lines, if located at The angle to the left of the straight line is positive. The angle to the right of the straight line is negative.

[0118] In the area to be monitored, only the data of the coaxial dust measuring instrument at the same time is considered. The initial dust core generation position is generally close to the side where the dust concentration data is larger. Bigger than , then it means The closer Therefore, the dust concentration data in the relative direction is used to determine the angle of the initial dust core generation position, that is, the horizontal angle and the vertical angle.

[0119] S203. Establish a mathematical relationship equation about x and y based on the horizontal angle and the vertical angle, wherein x is the distance between the initial dust core generation position and the first monitoring point, and y is the distance between the initial dust core generation position and the third monitoring point.

[0120] The angles between the horizontal and vertical directions of the initial dust core generation position are respectively the horizontal angle and the vertical angle , the value range is It is generally believed that in the absence of external forces, the decreasing efficiency of dust core pollution concentration changes steadily, and the change components along the horizontal and vertical directions are also stable, that is, the horizontal component at the initial dust core generation position is stable. The concentration change rate, the horizontal component at the location where the initial dust core is generated to The concentration change rate is consistent.

[0121] Specifically, represents the distance between the initial dust core generation position and the first monitoring point, y represents the distance between the initial dust core generation position and the third monitoring point, Indicates the dust concentration data at the location where the initial dust core is generated. The dust concentration at the location where the initial dust core is generated is along The two sides of the direction decrease successively, and the decreasing efficiency is considered to be stable, so as to obtain the first equation. The left side of the first equation represents the concentration change rate of the left side of the horizontal component at the position where the initial dust core is generated, and the right side of the first equation represents the concentration change rate of the right side of the horizontal component at the position where the initial dust core is generated. According to the dust concentration at the position where the initial dust core is generated, the dust concentration at the initial dust core is generated. The concentrations on both sides of the direction decrease successively, and the decreasing efficiency is considered to be stable, thus obtaining the second equation. The left side of the second equation represents the concentration change rate above the vertical component at the position where the initial dust core is generated, and the right side of the second equation represents the concentration change rate below the vertical component at the position where the initial dust core is generated. According to the position where the initial dust core is generated, , The triangle formed by , according to the triangle cosine theorem, we can get the third-party formula.

[0122] Furthermore, the process of constructing the mathematical relationship equation about x and y includes:

[0123] In the area to be monitored, a first equation is constructed based on the dust concentration change rate on the right side of the horizontal component of the initial dust core generation position being equal to the dust concentration change rate on the left side.

[0124] The first equation can be expressed as:

[0125] ;

[0126] Among them, the represents the first dust concentration data, the represents the second dust concentration data, the is an unknown number, representing the dust concentration data at the location where the initial dust core is generated. represents the distance between the initial dust core generation position and the first monitoring point, represents the distance between the first monitoring point and the second monitoring point, represents the cosine function, represents the horizontal angle.

[0127] In the area to be monitored, the second equation is constructed based on the fact that the rate of change of dust concentration above the vertical component of the initial dust core generation position is equal to the rate of change of dust concentration below.

[0128] The second equation can be expressed as:

[0129] ;

[0130] Among them, the represents the third dust concentration data, the represents the fourth dust concentration data, the is a preset unknown number, representing the dust concentration data at the location where the initial dust core is generated, y represents the distance between the location where the initial dust core is generated and the third monitoring point, represents the distance value between the third monitoring point and the fourth monitoring point, represents the cosine function, represents the vertical angle.

[0131] In the triangle formed by the first monitoring point, the third monitoring point and the position where the initial dust core is generated, a third party formula is constructed according to the law of cosines.

[0132] The third-party program can be expressed as:

[0133] ;

[0134] Among them, the represents the distance between the initial dust core generation position and the first monitoring point, y represents the distance between the initial dust core generation position and the third monitoring point, represents the distance value between the first monitoring point and the third monitoring point, represents the cosine function, Represents the third preset angle, preferably , represents the horizontal angle.

[0135] S204. Solve the mathematical relationship equation about x and y to obtain the value of x and the value of y.

[0136] It can be seen that there are three unknowns in the first equation, the second equation and the third equation, namely x, y and .

[0137] Three equations with three unknowns. It is known that we can solve for x, y and .

[0138] S205. Obtain the coordinates of the initial dust core generation position in the two-dimensional coordinate model according to the horizontal angle, the vertical angle, the value of x, and the value of y.

[0139] Further, obtaining the coordinates of the initial dust core generation position according to the horizontal angle, the vertical angle, the x value, and the y value includes:

[0140] The first product of the value of x multiplied by the cosine value of the horizontal angle is used as the abscissa of the position where the initial dust core is generated;

[0141] The second product of the y value multiplied by the cosine value of the vertical angle is obtained, and the distance value between the third monitoring point and the fourth monitoring point minus the value of the second product is used as the ordinate of the position where the initial dust core is generated.

[0142] The coordinates of the initial dust core generation position can be expressed by the formula:

[0143] ;

[0144] Among them, the The horizontal coordinate of the position where the initial dust core is generated is represented by The ordinate represents the location where the initial dust core is generated, is the distance value between the third monitoring point and the fourth monitoring point.

[0145] Figure 5A flowchart of a process for obtaining the degree of influence of the offset provided in the fifth embodiment of the present invention. In the fifth embodiment, the process for obtaining the degree of influence of the unit wind force on the offset of the position where the initial dust core is generated includes:

[0146] S501. Obtain N preset historical coordinate positions of the initial dust core generation position before the current moment.

[0147] The preferred value of N is 10.

[0148] Optionally, N historical coordinate positions before the current moment may be selected in sequence at fixed time intervals. The fixed time intervals may be reasonably set autonomously and are not limited here.

[0149] S502. Obtain the distance difference between the historical coordinate position at the j-1th moment and the historical coordinate position at the jth moment respectively, wherein the value range of j is iN-1 to i, and i is the value at the current moment.

[0150] The distance difference can be expressed as:

[0151] ;

[0152] ( , ) represents the historical coordinate position at the j-1th moment, ( , ) represents the historical coordinate position at the jth moment.

[0153] S503. Obtain the average wind force of the N historical coordinate positions.

[0154] First, the wind vectors of the N historical coordinate positions are obtained, and the vector mean of the N wind vectors is calculated. The numerical value of the vector mean becomes the wind mean.

[0155] S504: Divide the mean of the distance differences by the mean wind force to obtain the offset impact degree.

[0156] The degree of influence of the offset can be expressed as:

[0157] ;

[0158] Among them, the Indicates the degree of influence of the offset, represents the mean of the distance differences, represents the wind force mean.

[0159] The present invention has the following beneficial effects:

[0160] In the present invention, first, the minimum circumscribed rhombus of the construction area is obtained as the area to be monitored, and each vertex of the area to be monitored is used as a monitoring point. The main purpose here is to determine the monitoring point to facilitate the subsequent acquisition of dust concentration data and wind condition data. The initial dust core generation position under windless conditions is determined according to the dust concentration data obtained at the monitoring point. The initial dust core generation position under windless conditions obtained here is used as the data basis for considering the target dust core generation position under windy conditions. According to the wind condition data obtained at the monitoring point, the degree of influence of the unit wind force on the offset of the initial dust core generation position and the wind direction angle corresponding to each of the monitoring points are obtained, and the wind direction angle is fused in the horizontal and vertical directions to obtain the horizontal fusion amount and the vertical fusion amount. Obtaining the horizontal fusion amount and the vertical fusion amount is used to adjust the initial dust core generation position. The initial dust core generation position is adjusted according to the horizontal fusion amount and the vertical fusion amount to obtain the target dust core generation position. The target dust core generation position here is the dust core generation position finally determined, which takes into account the influence of wind force. The real-time dust concentration data at the target dust core generation position is obtained, and the real-time dust reduction power data is obtained according to the real-time dust concentration data. The power of the dust reduction device is set to the real-time dust reduction power data to perform dust reduction operations toward the target dust core generation position. The dust removal device directly moves toward the target dust core generation position and sets the power to the real-time dust reduction power data for dust removal. This is to perform dust removal operations at the source of dust generation, which can directly hit the core of the dust problem, thereby achieving a more significant dust removal effect.

[0161] It should be noted that the sequence of the above embodiments of the present invention is only for description and does not represent the advantages and disadvantages of the embodiments. The processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0162] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

Claims

1. A method for monitoring dust during construction, characterized in that: The method comprises: The smallest circumscribed rhombus of the construction area is obtained as the area to be monitored, and each vertex of the area to be monitored is used as a monitoring point; Determining the initial dust core generation location under windless conditions based on the dust concentration data obtained at the monitoring point; According to the wind condition data obtained at the monitoring points, the influence degree of the unit wind force on the offset of the initial dust core generation position and the wind direction angles corresponding to each of the monitoring points are obtained, and the wind direction angles are fused horizontally and vertically to obtain the horizontal fusion amount and the vertical fusion amount; The initial dust core generation position is adjusted according to the horizontal fusion amount, the vertical fusion amount and the offset influence degree to obtain a target dust core generation position; Acquire real-time dust concentration data at the target dust core generation location, acquire real-time dust reduction power data based on the real-time dust concentration data, and set the power of the dust reduction device to the real-time dust reduction power data to perform dust reduction operations toward the target dust core generation location.

2. The method for monitoring dust during construction as claimed in claim 1, characterized in that: The method of obtaining the minimum circumscribed diamond of the construction area as the area to be monitored includes: The convex hull method is used to perform a minimum circumscribed diamond operation on the construction area, and the minimum circumscribed diamond area is the area to be monitored.

3. The method for monitoring dust during construction as claimed in claim 1, characterized in that: Determining the initial dust core generation location under windless conditions based on the dust concentration data obtained at the monitoring point includes: A two-dimensional coordinate model is constructed for the area to be monitored, in which the monitoring points are all located in the first quadrant and there are two monitoring points located on the coordinate axis of the two-dimensional coordinate model. The monitoring point located on the ordinate of the two-dimensional coordinate model is the first monitoring point, and the third monitoring point, the second monitoring point, and the fourth monitoring point are rotated clockwise. Calculating the horizontal angle according to the dust concentration data of the monitoring point in the horizontal direction, and calculating the vertical angle according to the dust concentration data of the monitoring point in the vertical direction; A mathematical relationship equation about x and y is established according to the horizontal angle and the vertical angle, wherein x is the distance between the initial dust core generation position and the first monitoring point, and y is the distance between the initial dust core generation position and the third monitoring point; Solve the mathematical equation about x and y to get the value of x and the value of y; The coordinates of the initial dust core generation position in the two-dimensional coordinate model are obtained according to the horizontal angle, the vertical angle, the value of x and the value of y.

4. The method for monitoring dust during construction as claimed in claim 3, characterized in that: The calculating the horizontal angle according to the dust concentration data of the monitoring point in the horizontal direction comprises: The value of the third dust concentration data minus the fourth dust concentration data is used as the input value of the logic function, wherein the third dust concentration data is the dust concentration data monitored by the third monitoring point, and the fourth dust concentration data is the dust concentration data monitored by the fourth monitoring point; The horizontal angle is obtained by subtracting the first preset value from the output value of the logic function and then multiplying the output value by the first preset angle.

5. The method for monitoring dust during construction as claimed in claim 3, characterized in that: The process of constructing the mathematical relationship equation about x and y includes: In the area to be monitored, a first equation is constructed based on the dust concentration change rate on the right side of the horizontal component of the initial dust core generation position being equal to the dust concentration change rate on the left side; In the area to be monitored, a second equation is constructed based on the dust concentration change rate above the vertical component of the initial dust core generation position being equal to the dust concentration change rate below; In the triangle formed by the first monitoring point, the third monitoring point and the position where the initial dust core is generated, a third party formula is constructed according to the law of cosines.

6. The method for monitoring dust during construction as claimed in claim 3, characterized in that: Obtaining the coordinates of the initial dust core generation position according to the horizontal angle, the vertical angle, the x value, and the y value includes: The first product of the value of x multiplied by the cosine value of the horizontal angle is used as the abscissa of the position where the initial dust core is generated; The second product of the y value multiplied by the cosine value of the vertical angle is obtained, and the distance value between the third monitoring point and the fourth monitoring point minus the value of the second product is used as the ordinate of the position where the initial dust core is generated.

7. The method for monitoring dust during construction as claimed in claim 1, characterized in that: The process of obtaining the degree of influence of the unit wind force on the offset of the initial dust core generation position includes: Obtaining the preset N historical coordinate positions of the initial dust core generation position before the current moment; Respectively obtain the distance difference between the historical coordinate position at the j-1th moment and the historical coordinate position at the jth moment, wherein the value range of j is iN-1 to i, and i is the value at the current moment; Obtaining the wind force averages of the N historical coordinate positions; The offset influence degree is obtained by dividing the mean of the distance differences by the mean wind force.

8. The method for monitoring dust during construction as claimed in claim 1, characterized in that: The process of fusing the wind direction angle in the horizontal direction and the vertical direction to obtain the horizontal fusion amount and the vertical fusion amount includes: The horizontal fusion amount is obtained by multiplying the cosine value of each wind direction angle by the corresponding wind force value and then adding them in sequence; The vertical fusion amount is obtained by multiplying the sine value of each wind direction angle by the corresponding wind force value and then adding them in sequence.

9. The method for monitoring dust during construction as claimed in claim 1, characterized in that: Adjusting the initial dust core generation position according to the horizontal fusion amount, the vertical fusion amount, and the offset influence degree to obtain the target dust core generation position includes: Determine whether the horizontal fusion amount is greater than or equal to 0. If not, obtain the third product of the offset influence degree multiplied by the value of the horizontal coordinate of the initial dust core generation position, and subtract the value of the third product from the value of the horizontal coordinate of the initial dust core generation position as the value of the horizontal coordinate of the target dust core generation position. If yes, obtain the third product of the offset influence degree multiplied by the value of the horizontal coordinate of the initial dust core generation position, and add the value of the third product from the value of the horizontal coordinate of the initial dust core generation position as the value of the horizontal coordinate of the target dust core generation position. Determine whether the vertical fusion amount is greater than or equal to 0. If not, obtain the fourth product of the offset influence degree multiplied by the value of the ordinate of the initial dust core generation position, and subtract the value of the fourth product from the value of the ordinate of the initial dust core generation position as the value of the ordinate of the target dust core generation position. If so, obtain the fourth product of the offset influence degree multiplied by the value of the ordinate of the initial dust core generation position, and add the value of the fourth product from the value of the ordinate of the initial dust core generation position as the value of the ordinate of the target dust core generation position.

10. The method for monitoring dust during construction as claimed in claim 1, characterized in that: Acquiring real-time dust reduction power data according to the real-time dust concentration data includes: The value of the dust concentration data corresponding to the preset minimum dust reduction power is subtracted from the real-time dust concentration data as the input value of the exponential function; The output value of the exponential function is multiplied by the preset minimum dust reduction power, and then added with the value of the preset minimum dust reduction power as the real-time dust reduction power data.

Images