Method for improving intelligence in continuous compaction control

Abstract

The invention discloses a method for improving intelligence in continuous compaction control. The method comprises the following steps: automatically starting or stopping data acquisition according to the start-stop state of a road roller; removing the collected invalid data according to whether the collected road roller track data has back rolling or not; according to the collected latitude and longitude and elevation information of the road roller, automatically identifying whether the road roller is a new layer or not. Whether to start or stop the data acquisition equipment can be automatically identified through the start-stop state of the road roller; invalid data in automatic acquisition is eliminated by judging whether the acquired track data of the road roller has back rolling or not, so that invalid data such as transition and road passing can be effectively eliminated; through an automatic identification technology of the rolling layer, whether the rolling layer is a new layer can be automatically identified; due to the integration of the above technologies, the intelligent continuous compaction control system can realize full-automatic acquisition and automatic data analysis, human intervention is not needed, a road roller operator is completely liberated, and the application of the continuous compaction control technology in actual construction is greatly promoted.

Description

Technical Field

[0001] The invention relates to the technical field of filling engineering, and in particular to a method for improving intelligence in continuous compaction control. Background Art

[0002] Filling engineering is a general term for geotechnical structures formed by piling building materials (rock, cement, asphalt, etc.) according to certain requirements and rolling them with compaction equipment (such as rollers). It covers many fields such as railways, highways, airports, dams, municipal engineering, and port engineering. The key factors that determine the quality of filling engineering are filler composition and rolling control. On the premise of controlling the quality of filler, the focus of engineering quality is on compaction quality control.

[0003] Poor compaction quality of filling can cause serious engineering risks and consequences. The traditional compaction quality control method is mainly based on point sampling inspection. Due to its inherent limitations, it has become a bottleneck restricting compaction quality, especially compaction uniformity. As a new compaction quality control method, continuous compaction control has been widely valued at home and abroad because it can overcome the shortcomings of traditional detection methods and achieve full coverage detection and control of the rolling surface.

[0004] Continuous compaction control refers to the process of filling and rolling. According to the principle of dynamic interaction between the filling body and the vibratory roller, the vertical vibration response signal of the vibratory wheel of the vibratory roller is continuously measured and technically processed to establish a detection, evaluation and feedback control system to achieve real-time dynamic monitoring and control of the compaction quality of the entire rolling surface.

[0005] In the continuous compaction control system, when the current layer of the roadbed is rolled, loose soil and other fillers will continue to be spread on it, and the roller will continue to roll on it. When rolling a new layer, the existing system generally uses manual operation software to identify the new layer, but in actual operation, the new layer and the historical layer will be alternated during rolling, especially at the junction of the new and old layers, so it is extremely inconvenient for the roller operator to use.

[0006] In addition, existing systems often have a vehicle-mounted control operating system that requires the roller operator to operate. In addition to the operations at the identification layer, there are also operations such as turning on the device, logging into the software, selecting projects, setting project parameters, and starting data collection. However, roller operators are generally older and have limited educational backgrounds, which makes it even more difficult for them to handle the cumbersome terminal operations. As a result, the intelligent continuous compaction control system is difficult to promote on a large scale. Summary of the invention

[0007] The purpose of the present invention is to provide a method for improving the intelligence of continuous compaction control in view of the above-mentioned deficiencies in the current application of continuous compaction control systems, so that the continuous compaction control system can realize fully automatic data collection and analysis without human intervention, completely liberating the roller operator, and greatly promoting the application of continuous compaction control technology in actual construction.

[0008] The present invention is achieved through the following technical solutions:

[0009] The present invention provides a method for improving intelligence in continuous compaction control, comprising:

[0010] Automatically start or stop data collection according to the start and stop status of the roller;

[0011] According to whether the collected roller trajectory data contains back-rolling, the invalid collected data is eliminated;

[0012] Based on the collected latitude, longitude and elevation information of the roller, it is automatically identified whether it is a new layer.

[0013] As a preferred solution of the present invention, a vibration sensor is installed on the roller to collect data, and the data is processed to find the main frequency amplitude value. When multiple consecutive data amplitudes exceed a threshold, it is determined that the roller is in the start-up state.

[0014] As a preferred solution of the present invention, when no data amplitude exceeds a threshold value within a preset time, it is determined that the roller is in a stopped state.

[0015] As a preferred solution of the present invention, the preset time is 1 hour.

[0016] As a preferred solution of the present invention, automatically identifying whether it is a new layer specifically includes:

[0017] Obtain the longitude, latitude and elevation information of the roller in real time, convert the longitude and latitude into plane coordinates, perform sliding smoothing on the elevation, eliminate the distortion of the elevation itself, and draw a plane diagram of the rolling track;

[0018] Draw the rolling elevation plan and rolling time plan according to the rolling track plan to record the rolling elevation information and rolling time information;

[0019] The time difference between the current rolling and the most recent rolling in history is calculated according to the rolling time plan. When the time difference reaches the preset threshold, the elevation difference between the current rolling and the most recent rolling in history is calculated according to the rolling elevation plan to see whether it is greater than the preset threshold. If it is greater than the threshold, it is determined to be a new layer.

[0020] As a preferred solution of the present invention, the longitude, latitude and elevation information of the roller is collected in real time by using an RTK positioning device.

[0021] As a preferred solution of the present invention, batch processing is performed after the longitude, latitude and elevation data of the roller acquired in real time are accumulated for 3 minutes.

[0022] As a preferred solution of the present invention, the elimination of the collected invalid data specifically includes:

[0023] Draw the roller rolling track plan, rolling time plan, and track point number plan in real time, and record the track number of the roller turning point to identify invalid return rolling data caused by turning;

[0024] When drawing the rolling track plan, the rolling time is compared. If the rolling time exceeds the preset time, the current track is marked as invalid data to be eliminated. If it does not exceed the preset time, the current track point is considered to be return rolling data, and the historical track point number and the current track point number are marked as return rolling track point numbers;

[0025] Traverse each pixel point of the trajectory plan. If the pixel point is rolled only once, obtain the trajectory point number of the point. If the trajectory point number is in the list of return rolling, it will not be eliminated. Otherwise, eliminate the trajectory map once. If the number of rolling passes is greater than 2 times, check whether the trajectory point number is in the list of trajectories to be eliminated. If so, eliminate the trajectory point once, and then check whether the trajectory point number is in the list of return rolling caused by the roller turning around. If so, eliminate the trajectory twice.

[0026] As a preferred solution of the present invention, if there is no track after the track is removed, the track before rolling is refilled into the area without the track.

[0027] As a preferred solution of the present invention, the preset time is 30 minutes.

[0028] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0029] The present invention automatically starts or stops data collection according to the start and stop status of the roller, and can automatically identify whether to start or stop the data collection device; by determining whether the collected roller trajectory data includes back-rolling, invalid data in the automatic collection is eliminated, and invalid data such as transfer and passing can be effectively eliminated; through the automatic identification technology of the rolled layer, it can automatically identify whether it is a new layer; due to the integrated use of the above technologies, the continuous compaction control system can realize fully automatic collection and automatic analysis of data, no longer requiring human intervention, completely liberating the roller operator, and greatly promoting the application of continuous compaction control technology in actual construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0031] Figure 1 A flow chart of a method for improving intelligence in continuous compaction control in the present invention;

[0032] Figure 2 It is the rolling elevation plan drawn in the present invention;

[0033] Figure 3 A plan view of the rolling track drawn in the present invention;

[0034] Figure 4 It is the rolling time plane diagram drawn in the present invention. DETAILED DESCRIPTION

[0035] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0037] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0038] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0039] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0040] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0041] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces), unless otherwise clearly and specifically defined.

[0042] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0043] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0044] In the continuous compaction control system, when the current layer of the roadbed is rolled, loose soil and other fillers will continue to be spread on it, and the roller will continue to roll on it. When rolling a new layer, the existing system generally uses manual operation software to identify the new layer, but in actual operation, the new layer and the historical layer will be alternated during rolling, especially at the junction of the new and old layers, so it is extremely inconvenient for the roller operator to use.

[0045] In addition, existing systems often have a vehicle-mounted control operating system that requires the roller operator to operate. In addition to the operations at the identification layer, there are also operations such as turning on the device, logging into the software, selecting projects, setting project parameters, and starting data collection. However, roller operators are generally older and have limited educational backgrounds, which makes it even more difficult for them to handle the cumbersome terminal operations. As a result, the intelligent continuous compaction control system is difficult to promote on a large scale.

[0046] In view of this, the applicant has conducted in-depth research on roller compaction construction and invented a method that can improve the intelligence of continuous compaction control. This method automatically determines whether data needs to be collected according to the start and stop status of the roller, and at the same time eliminates invalid data collected, and automatically identifies whether it is a new layer based on the collected data; this method no longer requires human intervention in collecting and analyzing data, achieves the level of automated operation, completely liberates the roller operator, and is conducive to promoting the application of continuous compaction control technology in actual construction.

[0047] Please refer to Figures 1 to 4 A method for improving intelligence in continuous compaction control provided in an embodiment of the present application includes:

[0048] Automatically start or stop data collection according to the start and stop status of the roller;

[0049] According to whether the collected roller trajectory data contains back-rolling, the invalid collected data is eliminated;

[0050] Based on the collected latitude, longitude and elevation information of the roller, it is automatically identified whether it is a new layer.

[0051] In this application, data collection is automatically started or stopped according to the start and stop status of the roller, thereby realizing the automatic start and stop of the data collection equipment. Whether the data is valid is determined by whether there is a track return within a certain period of time, and invalid data in the automatic collection is eliminated, which can effectively eliminate invalid data such as transfer and passing. Through the automatic identification technology of the rolling layer, it can automatically identify whether it is a new layer. Due to the integration of the above technologies, the continuous compaction control system can realize fully automatic collection and automatic analysis of data, and no human intervention is required, achieving the level of automatic operation, completely liberating the roller operator, and greatly promoting the application of continuous compaction control technology in actual construction.

[0052] According to some embodiments of the present application, a vibration sensor is installed on the roller to collect data, and the data is processed to find the main frequency amplitude value. When multiple consecutive data amplitudes exceed the threshold, it is determined that the roller is in the start state. By using multiple consecutive data exceeding the threshold to determine, it can avoid the vibration of other engineering equipment on the construction site causing false triggering of the start device.

[0053] Specifically, the automatic start and stop of the data acquisition equipment includes:

[0054] 1) Install a vibration sensor on the top of the roller and use it to collect data once a second;

[0055] 2) Perform Fourier transform on the collected vibration data to find the main frequency amplitude value. When multiple consecutive data amplitudes exceed the threshold, it is considered that the roller is in the starting state and the data acquisition device starts to collect data;

[0056] 3) When no data amplitude exceeds the threshold within 1 hour, it is determined that the roller is in a stopped state, and the data acquisition device stops data acquisition.

[0057] In this application, in order to solve the complex software operation problems on the vehicle side, an automatic start-stop function is added to the data acquisition equipment. The vibration sensor is used to distinguish the start state and the stationary state of the roller. When the roller is in the start state, data collection is automatically performed, and when the roller is in the stationary state, data collection is automatically turned off. This saves energy while avoiding the collection of some invalid data. The automatic start-stop function does not require the roller operator to perform tedious terminal operations.

[0058] According to some embodiments of the present application, automatically identifying whether it is a new layer specifically includes:

[0059] 1) Obtain the longitude, latitude and elevation information of the roller in real time. After 3 minutes of data accumulation, batch processing is performed to convert the longitude and latitude into plane coordinates, slide and smooth the elevation, eliminate the distortion of the elevation itself, draw a rolling track plan, and draw a rolling elevation plan and a rolling time plan based on the rolling track plan to record the elevation information and rolling time information;

[0060] 2) Calculate the time difference between the current rolling and the most recent rolling in history according to the rolling time plan. When the time difference reaches the preset threshold, calculate whether the elevation difference between the current rolling and the most recent rolling in history is greater than the preset threshold according to the rolling elevation plan. If the elevation difference is greater than the threshold, it is judged as a new layer and marked as 1, otherwise it is marked as 0. Repeat the above process until all data processing of the current batch is completed.

[0061] This application uses high-precision RTK equipment to collect roller elevation information in real time, superimposes the elevation information on the roller trajectory and draws it into the plan view. After obtaining the roller trajectory and elevation in real time, it locates the position of the elevation map according to the trajectory, obtains the most recent historical elevation value, and compares it with the currently obtained elevation value. When the elevation difference is greater than the preset threshold, it can be determined to enter the rolling of the new layer. However, in actual situations, due to the error in the elevation collected by the RTK equipment, which is generally within ±5CM and can reach a maximum of ±8CM, coupled with the changes in the roller posture and tire pressure, the cumulative elevation error can reach more than 20CM. The regulations specify that the loose paving thickness is generally between 30cm-60cm depending on the functional type. Therefore, it is not reliable to simply use the elevation threshold as the basis for layer identification. Elevation correction and other restrictions are also required. It was found through actual rolling operations that when one layer is rolled before the next layer is rolled, there is usually an interval of several hours or even several days for filling, testing, acceptance, etc., so time parameters are added to limit it. When the time interval between two rollings is relatively short, even if the elevation difference reaches the threshold, it is not judged as a new layer but as an elevation difference caused by error. When the elevation difference reaches the threshold and the time interval is longer, it will follow up again to see whether a new layer appears within a period of time before and after the current time for a comprehensive judgment.

[0062] According to some embodiments of the present application, invalid data elimination specifically includes:

[0063] 1) Draw the roller rolling track plan, rolling time plan, and track point number plan in real time, and record the track number of the roller turning point to identify invalid return rolling data caused by turning;

[0064] 2) When drawing the rolling track plan, compare the rolling time. If the rolling time exceeds 30 minutes, mark the current track as invalid data to be eliminated. If the rolling time does not exceed 30 minutes, the current track is considered to be return rolling data, and the historical track point number and the current track point number are marked as return rolling track point numbers;

[0065] 3) Traverse each pixel point of the trajectory plane map. If the pixel point is rolled only once, obtain the trajectory point number of the pixel point. If the trajectory point number is in the list of rolling back, it will not be removed. Otherwise, remove the trajectory map once. If the rolling number is greater than 2 times, check whether the trajectory point number is in the list of tracks to be removed. If so, remove the trajectory point once, and then check whether the trajectory point number is in the list of rolling back caused by the roller turning around. If so, remove the track with 2 times;

[0066] 4) After removing the track, in order to avoid the situation of "penetration" (no track), if there is no track, the track before rolling needs to be refilled into the "penetration" area.

[0067] In this application, since the fully automatic data collection function after the automatic start and stop of the data collection equipment is introduced, it is inevitable that a lot of invalid data will be collected, such as the trajectory data of the roller returning to the mechanical parking area, transfer, refueling, and access road construction after the operation is completed, so it is necessary to increase the automatic identification and elimination function of invalid data. In the actual rolling process, the effective rolling data will have back-rolling, that is, repeated rolling will be performed in a short time (a few minutes), while invalid rolling is generally a single rolling and will not be back-rolled in a short time. Therefore, the invalid data is identified by whether there is back-rolling in the roller trajectory within a certain period of time. When there is no back-rolling, it is determined to be invalid data and eliminated.

[0068] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for improving intelligence in continuous compaction control, It is characterized in that include: Automatically start or stop data collection according to the start and stop status of the roller; According to whether the collected roller trajectory data contains back-rolling, the invalid collected data is eliminated; Based on the collected latitude, longitude and elevation information of the roller, it is automatically identified whether it is a new layer.

2. The method for improving intelligence in continuous compaction control according to claim 1, It is characterized in that The data is collected by installing a vibration sensor on the roller, and the data is processed to find the main frequency amplitude value. When multiple consecutive data amplitudes exceed the threshold, it is determined that the roller is in the starting state.

3. The method for improving intelligence in continuous compaction control according to claim 2, It is characterized in that When no data amplitude exceeds the threshold value within a preset time, it is determined that the roller is in a stopped state.

4. The method for improving intelligence in continuous compaction control according to claim 3, It is characterized in that The preset time is 1 hour.

5. The method for improving intelligence in continuous compaction control according to any one of claims 1 to 4, It is characterized in that Automatically identifying whether it is a new layer specifically includes: Obtain the longitude, latitude and elevation information of the roller in real time, convert the longitude and latitude into plane coordinates, perform sliding smoothing on the elevation, eliminate the distortion of the elevation itself, and draw a plane diagram of the rolling track; Draw the rolling elevation plan and rolling time plan according to the rolling track plan to record the rolling elevation information and rolling time information; The time difference between the current rolling and the most recent rolling in history is calculated according to the rolling time plan. When the time difference reaches the preset threshold, the elevation difference between the current rolling and the most recent rolling in history is calculated according to the rolling elevation plan to see whether it is greater than the preset threshold. If it is greater than the threshold, it is determined to be a new layer.

6. The method for improving intelligence in continuous compaction control according to claim 5, It is characterized in that The longitude, latitude and elevation information of the roller are collected in real time through the RTK positioning equipment.

7. The method for improving intelligence in continuous compaction control according to claim 5, It is characterized in that The real-time longitude, latitude and elevation data of the roller are accumulated for 3 minutes and then batch processed.

8. The method for improving intelligence in continuous compaction control according to any one of claims 1 to 4, It is characterized in that Elimination of invalid data collected specifically includes: Draw the roller rolling track plan, rolling time plan, and track point number plan in real time, and record the track number of the roller turning point to identify invalid return rolling data caused by turning; When drawing the rolling track plan, the rolling time is compared. If the rolling time exceeds the preset time, the current track is marked as invalid data to be eliminated. If it does not exceed the preset time, the current track point is considered to be return rolling data, and the historical track point number and the current track point number are marked as return rolling track point numbers; Traverse each pixel point of the trajectory plan. If the pixel point is rolled only once, obtain the trajectory point number of the point. If the trajectory point number is in the list of return rolling, it will not be eliminated. Otherwise, eliminate the trajectory map once. If the number of rolling passes is greater than 2 times, check whether the trajectory point number is in the list of trajectories to be eliminated. If so, eliminate the trajectory point once, and then check whether the trajectory point number is in the list of return rolling caused by the roller turning around. If so, eliminate the trajectory twice.

9. The method for improving intelligence in continuous compaction control according to claim 8, It is characterized in that If there is no track after removing the track, the track before rolling will be refilled into the area without track.

10. The method for improving intelligence in continuous compaction control according to claim 8, It is characterized in that The preset time is 30 minutes.

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