A prefabricated bridge spraying control method based on environmental information collection

Abstract

The application relates to the technical field of prefabricated bridge maintenance, and particularly discloses a spraying control method for a prefabricated bridge based on environmental information collection, which comprises the following steps: after spraying water on a prefabricated bridge through a spraying device in an initial direction, the surface humidity of the prefabricated bridge is acquired again, and the humidity change range is obtained according to the data obtained before and after; the spraying direction of the spraying device is readjusted according to the humidity change range through a controller, and a recommended spraying direction set of the current environmental wind is obtained; in the long-time and all-weather prefabricated bridge maintenance process, the spraying direction can be continuously adjusted according to the related parameters of the environmental wind, so that the best humidifying effect is obtained under the same spraying device and the same spraying state, water is saved, the starting time of the spraying device is reduced, the recommended spraying direction set is obtained, the selection range of the initial direction can be reduced next time, and the accuracy and precision of the initial direction selection are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of prefabricated bridge maintenance, in particular, relates to a spray control method for prefabricated bridge based on environmental information collection. BACKGROUND

[0002] Fabricated prefabricated concrete structure refers to the prefabricated concrete products processed and produced in a factory through standardized and industrialized methods. In contrast, traditional cast-in-place concrete requires formwork, casting and curing on site. The applicant's related products include medium and large prefabricated concrete components such as prestressed prefabricated bridges, prefabricated comprehensive pipe galleries, prefabricated pi-shaped beams, and prefabricated pipe culverts.

[0003] The production of medium and large prefabricated bridges and other fabricated prefabricated concrete components involves multiple process steps. For such products with high quality and safety requirements, mature, advanced and excellent process levels can fundamentally control production costs, improve work efficiency, and ensure production quality and engineering safety factors. The production mode has been industrialized, standardized and intelligentized in the industry.

[0004] For medium and large prefabricated bridges, the finished products that have not been completed at the construction site need to be humidified and maintained, and the maintenance period generally spans 22-27 days. For such a long maintenance period, a large amount of water and a lot of effort are needed to maintain the humidity to the maintenance standard. In the prior art, the humidity of the prefabricated bridge surface is detected, and the water spraying equipment is controlled to run regularly to ensure that the humidity level is always higher than the minimum standard. However, the drift of water mist caused by environmental wind is not considered in the maintenance method using detection-feedback. In the case of significant environmental wind, the overall water mist will be blown off, causing uneven water mist to fall during the drift process. Then, the same water output (water output time) will result in different amounts of water falling on the prefabricated bridge surface and being absorbed, resulting in different humidification effects for the same water output (water output time). For poor humidification effects, the traditional regularly running spray equipment needs to extend the spray time, which will obviously waste water resources. Therefore, the present application proposes a spray control method for prefabricated bridges based on environmental information collection. SUMMARY

[0005] The purpose of the present application is to provide a spray control method for prefabricated bridges based on environmental information collection, which solves the following technical problems:

[0006] How to obtain the best angle of the spray device under the influence of environmental wind to improve efficiency and reduce water consumption in all-weather and long-term maintenance.

[0007] The purpose of the present application can be achieved by the following technical solutions:

[0008] A prefabricated bridge spraying control method based on environmental information collection, comprising:

[0009] Step one, based on environmental information, the humidity level of the prefabricated bridge is evaluated to obtain the surface humidity of the prefabricated bridge;

[0010] Step two, a spraying device capable of adjusting the height and angle of the spraying point is hung directly above the prefabricated bridge;

[0011] Step two, when the surface humidity of the prefabricated prefabricated bridge is lower than the preset threshold, the current environmental wind is recorded, then the spraying device is set to the initial direction and the prefabricated bridge is sprayed for a standard time to increase the surface humidity level of the prefabricated bridge;

[0012] Step three, after spraying water to the prefabricated bridge through the initial direction of the spraying device, the surface humidity of the prefabricated bridge is obtained again, and the humidity change amplitude is obtained according to the data obtained before and after;

[0013] Step four, the spraying direction of the spraying device is adjusted again according to the humidity change amplitude through the controller, and a recommended spraying direction set of the current environmental wind is obtained, wherein the controller can be used for various spray heads, which generally consists of the following parts:

[0014] Power supply circuit: the power supply of the controller is 12V, DC; motor drive circuit: driven by an AC asynchronous motor; pressure sensor: can measure the difference between working pressure and actual pressure to control the spraying direction; input circuit: composed of relays, voltage and current sensors; memory, used to record the data generated in the control process.

[0015] Through the above technical solution: in the long-term, all-weather maintenance process of the prefabricated bridge, the spraying direction can be adjusted according to the related parameters of the environmental wind, so as to obtain the best humidification effect under the same spraying device and the same spraying state, save water and reduce the starting time of the spraying device, and obtain the recommended spraying direction set, which can reduce the selection range of the initial direction next time, improve the accuracy and precision of the initial direction selection.

[0016] As a further technical solution of the application: the initial direction is related to the wind direction in the environmental factors when the initial direction is set;

[0017] Taking the spraying point as the center of a circle, the face perpendicular to the wind direction and passing through the center of the circle is the bottom face to construct two semicircles;

[0018] The initial direction is obtained from the set of all radii of the second passed semicircle along the fluid moving direction and the spraying range covering the surface of the prefabricated bridge.

[0019] Through the technical scheme, in the initial stage of the project, half of the invalid directions are removed through the method, and the correctness of the direction selection is increased.

[0020] As a further technical scheme of the present application, when the humidity variation amplitude is lower than the standard humidity variation threshold, the spray direction of the spray device is adjusted according to an angle adjustment strategy, and the angle adjustment strategy includes:

[0021] Based on the initial direction, a direction is randomly selected in the full direction set and rotated by a preset amplitude, and the spray is controlled to continue for a standard time;

[0022] The humidity variation amplitude of the prefabricated bridge after the direction adjustment is obtained.

[0023] If the humidity variation amplitude of the adjusted direction is smaller than the humidity variation amplitude of the initial direction, the direction is recorded as an invalid direction, and the direction is removed from the full direction set and restored to the initial direction, and then another direction is selected from the full direction set and rotated by a preset amplitude.

[0024] If the humidity variation amplitude of the direction is increased compared with the humidity variation amplitude of the initial direction, the direction is recorded as a starting direction, and then the starting direction is continued to increase by a preset amplitude, and the humidity variation amplitude of the prefabricated bridge after rotation is obtained, until the humidity variation amplitude is lower than the standard humidity variation threshold again, and the current direction is recorded as a boundary direction. The set of all directions from the starting direction to the boundary direction is recorded as an effective direction set.

[0025] Through the technical scheme, the humidity variation is adjusted by the angle adjustment strategy to obtain a set of angles that meet the expected spray state. During this process, the angle adjustment after each start can further optimize the set of angles that meet the expectations in a relatively larger range and higher precision.

[0026] As a further technical scheme of the present application, after obtaining one of the effective direction sets, the spray direction of the spray point is restored to the initial direction, and then a direction is selected again for adjustment and a new effective direction set is obtained.

[0027] When the number of effective direction sets is 3, the adjustment is stopped, and then the starting directions of the three effective direction sets are used as edges, and the spray point is used as a vertex to construct a first direction set. The boundary directions of the three effective direction sets are used as edges, and the spray point is used as a vertex to construct a second direction set.

[0028] The set obtained by subtracting the first direction set from the second direction set is a reference direction set.

[0029] In the reference direction set, a sector formed by all directions in the effective direction set is rotated around the sector center and the line connecting the center and the midpoint of the arc to obtain a new reference direction set;

[0030] The union of all new reference direction sets is the recommended spray direction set of the current environmental wind.

[0031] Through the above technical solution: in the process of constructing the recommended spray direction set of the current environmental wind, the comprehensive mode of actual adjustment and theoretical optimization transformation is used, on the one hand, the coverage range of the recommended spray direction set is increased, and on the other hand, the number of adjustments in the process of constructing the recommended spray direction set of the current environmental wind is effectively reduced, and repeated adjustment of the angle is avoided.

[0032] As a further technical solution of the application: the step of adjusting the height of the spray point comprises:

[0033] The current spray point position and the prefabricated bridge position needing to be sprayed are obtained;

[0034] When the distance between the water mist boundary and the prefabricated bridge boundary is outside the coverage threshold range;

[0035] If the coverage threshold range is exceeded, the height of the spray point is reduced;

[0036] If the coverage threshold range is exceeded, the height of the spray point is reduced;

[0037] As a further technical solution of the application: if the number of effective direction sets is greater than 3, the average value of the humidity change amplitude obtained in the process of determining the effective direction set is selected;

[0038] The three with the largest average value of humidity change amplitude are selected as the effective direction set.

[0039] As a further technical solution of the application: the recommended spray direction set corresponds to the current environmental wind, and a plurality of recommended spray direction sets are generated according to a plurality of different wind directions, and are recorded in the controller;

[0040] When the recommended spray direction is recorded in the controller, a direction is randomly selected from the corresponding recommended spray direction set as the initial direction according to the real-time wind direction.

[0041] As a further technical solution of the application: in the angle adjustment process, if the surface humidity of the prefabricated bridge is greater than or equal to 98%, the spraying and angle adjustment process is stopped;

[0042] The acquisition of the plurality of recommended spray direction sets is a non-continuous process, in which, if the current environmental wind changes from the wind direction in the last spraying process when spraying again, the adjustment process of the last wind direction in the station is recorded and the recommended spray direction set corresponding to the new wind direction is acquired, when the re-spraying direction exists in the system, if the adjustment process has not been completed, the adjustment process is continued until the recommended spray direction set is obtained, if the recommended spray direction set exists, the initial spraying direction is selected from the recommended spray direction set.

[0043] Advantages of the present application:

[0044] (1) The present application can continuously adjust the spraying direction according to the related parameters of the environmental wind in the long-term, all-weather precast bridge maintenance process, so as to obtain the best humidification effect under the same spraying device and the same spraying state, save water and reduce the starting time of the spraying device, and obtain the recommended spray direction set, which can reduce the selection range of the initial direction next time, improve the accuracy and precision of the initial direction selection.

[0045] (2) The present application adjusts the angle according to the angle adjustment strategy to obtain the angle set that meets the expected spraying state, and in this process, the angle adjustment after each start can further optimize the angle set that meets the expected spraying state in a relatively larger range and higher precision.

[0046] (3) The present application adjusts the angle according to the angle adjustment strategy to obtain the angle set that meets the expected spraying state, and in this process, the angle adjustment after each start can further optimize the angle set that meets the expected spraying state in a relatively larger range and higher precision. BRIEF DESCRIPTION OF DRAWINGS

[0047] The present application will be further described below with reference to the accompanying drawings.

[0048] Figure 1 It is the overall flowchart of the present application. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0050] Please refer to Figure 1As shown, in one embodiment, a prefabricated bridge spraying control method based on environmental information collection is provided, comprising:

[0051] Step one, based on environmental information, the humidity level of the prefabricated bridge is evaluated to obtain the surface humidity of the prefabricated bridge;

[0052] Step two, a spraying device that can adjust the height and angle of the spraying point is hung directly above the prefabricated bridge, the net height in GB50084-2017 is 6-8m, the water spraying intensity is 4-8L / (min·m 2 ), and the effective coverage area of the nozzle is 200-240m 2 , which can effectively cover multiple prefabricated bridges;

[0053] Step two, when the surface humidity of the prefabricated prefabricated bridge is lower than the preset threshold, the current environmental wind is recorded, and then the spraying device is set to the initial direction and sprayed on the prefabricated bridge within a standard time to increase the surface humidity level of the prefabricated bridge;

[0054] Step three, after spraying water on the prefabricated bridge through the spraying device in the initial direction, the surface humidity of the prefabricated bridge is obtained again, and the humidity change amplitude is obtained according to the data obtained before and after;

[0055] Step four, the spraying direction of the spraying device is adjusted again according to the humidity change amplitude through the controller, and a recommended spraying direction set of the current environmental wind is obtained, and the recommended spraying direction corresponding to the information closest to the information recorded in the controller is selected as the initial direction selection set according to the current environmental wind information each time it is started. It can be understood that the recommended spraying direction set is for the current environmental wind, and the wind power, wind direction or other wind power parameters change will correspond to a new recommended spraying direction set. At the same time, considering that the wind power will not be the same each time the spraying device is started, the controller sets the related parameters of the environmental wind as a floating interval when recording information, such as an allowable floating range of ±10%, and sets the wind power, wind speed and other parameters as an interval that can float up and down. When in use, the on-site environmental wind parameters are compared with the recorded parameters, and a new recommended spraying direction set should be established to increase the richness of the recorded information in the controller if any parameter exceeds this interval, wherein the controller can be used for various nozzles, which generally consists of the following parts:

[0056] Power supply circuit: the power supply of the controller is 12V, DC; motor drive circuit: driven by an asynchronous motor; pressure sensor: can measure the difference between working pressure and actual pressure to control the spraying direction; input circuit: composed of relays, voltage and current sensors; memory, used to record the data generated in the control process.

[0057] The method can adjust the spray direction according to the relevant parameters of the environmental wind in the long-term, all-weather precast bridge maintenance process, so as to obtain the best humidification effect in the same spray device and the same spray state, save water, reduce the start time of the spray device, obtain the recommended spray direction set, and narrow the selection range of the initial direction in the next start, improve the accuracy of the initial direction selection, and improve the accuracy of the initial direction selection.

[0058] The initial direction is related to the wind direction in the environmental factors when the initial direction is set.

[0059] Two semicircles are constructed with the spray point as the center and the plane perpendicular to the wind direction and passing through the center as the bottom surface.

[0060] The initial direction is obtained from the set of all radii of the second passed semicircle of the fluid moving along the wind direction and the spray range covering the surface of the precast bridge.

[0061] In the data-lacking stage at the beginning of the project, the above method is used to eliminate half of the invalid directions, increase the correctness of the direction selection, and it should be noted that the method of obtaining the initial direction from the set of all radii of the second passed semicircle of the fluid moving along the wind direction and the spray range covering the surface of the precast bridge can be random or at a certain angle with the wind direction.

[0062] When the humidity change amplitude is lower than the standard humidity change threshold, the spray direction of the spray device is adjusted according to the angle adjustment strategy, and the angle adjustment strategy includes:

[0063] Based on the initial direction, a direction is randomly selected in the full direction set to rotate a preset amplitude and control continuous spraying within a standard time.

[0064] The humidity change amplitude of the precast bridge after the direction adjustment is obtained.

[0065] If the humidity change amplitude of the adjusted direction is smaller than the humidity change amplitude of the initial direction, the direction is recorded as an invalid direction, and the direction is removed from the full direction set and restored to the initial direction, and then another direction is selected from the full direction set to rotate a preset amplitude. The preset amplitude is related to the final adjustment times, for example, if the final adjustment range is within 20 degrees, and if the preset amplitude is 5, it needs to be adjusted 5-6 times, the larger the preset amplitude, the fewer the adjustment times, but the accuracy is correspondingly reduced.

[0066] If the humidity variation amplitude of the direction is increased compared with the humidity variation amplitude of the initial direction, the direction is recorded as the starting direction, and then the humidity variation amplitude of the precast bridge after rotation is obtained while the preset amplitude is continuously increased along the starting direction until the humidity variation amplitude is lower than the standard humidity variation threshold value again, and the current direction is recorded as the boundary direction, and a set of all directions from the starting direction to the boundary direction is recorded as an effective direction set, wherein the humidity variation amplitude threshold value is an empirical parameter and can be measured by multiple experiments.

[0067] The angle adjustment strategy is used to adjust the angle of the spray point according to the humidity variation to obtain an angle set meeting the expected spray state, and in this process, the angle adjustment after each start can further optimize the angle set meeting the expected spray state in a relatively larger range and with higher accuracy.

[0068] After obtaining one of the effective direction sets, the spray direction of the spray point is restored to the initial direction, and then a direction is selected again for adjustment and a new effective direction set is obtained.

[0069] When the number of effective direction sets is 3, the adjustment is stopped, and then a first direction set is constructed with the starting directions of the three effective direction sets as edges and the spray point as a vertex, and a second direction set is constructed with the boundary directions of the three effective direction sets as edges and the spray point as a vertex.

[0070] The set obtained by subtracting the first direction set from the second direction set is a reference direction set.

[0071] In the reference direction set, a sector surface formed by all directions in one effective direction set is rotated about an axis formed by the center of the sector and the midpoint of the arc to obtain a new reference direction set. Considering that the effective direction set is constituted according to whether the humidity variation amplitude is greater than the standard humidity variation threshold value, and that the humidity variation value corresponding to the effective direction set is first increased and then decreased when placed on a function, it can be understood that the number of the new reference direction set after appropriate expansion should also comply with this rule, and therefore the new reference direction set is obtained by using the theoretical transformation of sector rotation.

[0072] The union set of all new reference direction sets is a recommended spray direction set of the current environmental wind.

[0073] In the process of constructing the recommended spray direction set of the current environmental wind, the comprehensive method of actual adjustment and theoretical optimization transformation is used, which on the one hand increases the coverage range of the recommended spray direction set, and on the other hand effectively reduces the number of adjustments in the process of constructing the recommended spray direction set of the current environmental wind, thereby avoiding repeated angle adjustment.

[0074] As a further technical solution of the present application, the step of adjusting the height of the spray point comprises:

[0075] acquire the current spraying point position and the precast bridge position that needs to be sprayed;

[0076] when the distance between the water mist boundary and the precast bridge boundary is out of the coverage threshold range;

[0077] if the distance is out of the coverage threshold range, reduce the spraying point height;

[0078] if the distance is below the coverage threshold range, increase the spraying point height, it can be understood that the spraying device sprays in a conical manner, increasing the height can increase the coverage area, but reduce the mist content per unit area, so the height adjustment needs to be moderate.

[0079] if the number of the effective direction sets is greater than 3, select the average value of the humidity change amplitudes obtained in the process of determining the effective direction sets;

[0080] take the three with the largest average value of the humidity change amplitudes as the effective direction sets.

[0081] As a further technical solution of the present application: the recommended spraying direction sets correspond to the current environmental wind, and multiple recommended spraying direction sets are generated according to multiple different wind directions, and are recorded in the controller;

[0082] when the recommended spraying direction is recorded in the controller, randomly select a direction in the corresponding recommended spraying direction set as the initial direction according to the real-time wind direction.

[0083] As a further technical solution of the present application: in the angle adjustment process, if the precast bridge surface humidity is greater than or equal to 98%, stop spraying and the angle adjustment process;

[0084] the acquisition of the multiple recommended spraying direction sets is a non-continuous process, in the non-continuous process, if the current environmental wind changes from the wind direction in the last spraying process when spraying again, record and adjust the process of the last wind direction in the station hall, and start acquiring the recommended spraying direction set corresponding to the new wind direction, when the spraying direction again exists in the system, if the adjustment process has not been completed, continue the adjustment process until the recommended spraying direction set is obtained, if the recommended spraying direction set exists, select the initial spraying direction from the recommended spraying direction set.

[0085] The above has described one embodiment of the present application in detail, but the content described is only the preferred embodiment of the present application, and cannot be considered as limiting the implementation range of the present application. Any equivalent changes and improvements made according to the scope of the present application should still belong to the patent coverage range of the present application.

Claims

1. A spray control method for a precast bridge based on environmental information collection, characterized by, The application relates to a method for adjusting the spraying direction of a spraying device for a prefabricated bridge. The method comprises the following steps: Step 1: evaluating the humidity level of the prefabricated bridge based on environmental information to obtain the surface humidity of the prefabricated bridge; Step 2: suspending a spraying device capable of adjusting the height and angle of a spraying point above the prefabricated bridge; Step 3: when the surface humidity of the prefabricated bridge is lower than a preset threshold, recording the current environmental wind, setting the spraying device to an initial direction, and spraying the prefabricated bridge for a standard time; The initial direction is related to the wind direction in the environmental factors when the initial direction is set; Two semicircles are constructed with the spraying point as the center, a surface perpendicular to the wind direction and passing through the center as the bottom surface; The initial direction is obtained from all radii of the second semicircle passed by the fluid moving along the wind direction and the range of the spraying; Step 4: after spraying, the surface humidity of the prefabricated bridge is obtained again, and the humidity change range is obtained according to the data obtained before and after; Step 5: the spraying direction of the spraying device is adjusted again according to the humidity change range through a controller, and a recommended spraying direction set of the current environmental wind is obtained; When the humidity change range is lower than a standard humidity change threshold, the spraying direction of the spraying device is adjusted according to an angle adjustment strategy, and the angle adjustment strategy comprises the following steps: Randomly selecting a direction in the full direction set and rotating the direction by a preset range based on the initial direction, and controlling continuous spraying for a standard time; Obtaining the humidity change range of the prefabricated bridge after the direction is adjusted; If the humidity change range after the direction is adjusted is smaller than the humidity change range of the initial direction, the direction is recorded as an invalid direction, the direction is removed from the full direction set, and the initial direction is restored, then another direction is selected from the full direction set and rotated by a preset range; If the humidity change range of the direction is larger than the humidity change range of the initial direction, the direction is recorded as a starting direction, then the starting direction is continuously increased by a preset range, and the humidity change range of the prefabricated bridge after the rotation is obtained, until the humidity change range is lower than the standard humidity change threshold again, the current direction is recorded as a boundary direction, and a set of all directions from the starting direction to the boundary direction is recorded as an effective direction set; After an effective direction set is obtained, the spraying direction of the spraying point is restored to the initial direction, then another direction is selected for adjustment and a new effective direction set is obtained; When the number of effective direction sets is three, the adjustment is stopped, then the starting directions of the three effective direction sets are used as edges, and the spraying point is used as a vertex to construct a first direction set, the boundary directions of the three effective direction sets are used as edges, and the spraying point is used as a vertex to construct a second direction set; A reference direction set is obtained by subtracting the first direction set from the second direction set; In the reference direction set, a sector surface formed by all directions in an effective direction set is rotated about an axis formed by the center of the sector and the midpoint of an arc to obtain a new reference direction set; 2. The spray control method for a precast bridge based on environmental information collection according to claim 1, characterized in that, The union set of all new reference direction sets is a recommended spraying direction set of the current environmental wind. The step of adjusting the height of the spraying point comprises the following steps: Obtaining the current position of the spraying point and the position of the prefabricated bridge that needs to be sprayed. When the distance between the water mist boundary and the precast bridge boundary is out of the coverage threshold range; If the distance is out of the coverage threshold range, the spray point height is reduced; If the distance is below the coverage threshold range, the spray point height is increased.

3. The spray control method for a precast bridge based on environmental information collection according to claim 2, characterized in that, If the number of the effective direction sets is greater than 3, the average of the humidity change amplitudes obtained in the process of determining the effective direction sets is selected; The three with the largest average of the humidity change amplitudes are selected as the effective direction sets.

4. The spray control method for a precast bridge based on environmental information collection according to claim 3, characterized in that, The recommended spray direction sets correspond to the current environmental wind, and multiple recommended spray direction sets are generated according to multiple different wind directions, and are recorded in the controller; When the recommended spray direction is recorded in the controller, an initial direction is randomly selected from the corresponding recommended spray direction set according to the real-time wind direction.

5. The spray control method for precast bridge based on environmental information collection according to claim 4, characterized in that, If the surface humidity of the prefabricated bridge is ≥ 50% during the angle adjustment process That is, the spraying and angle adjustment process are stopped. The acquisition of the multiple recommended spray direction sets is a non-continuous process.

Images