A road roller vibration compaction adaptive control system and method

Abstract

The present invention belongs to the technical field of adaptive control of road rollers, and specifically provides an adaptive control system and method for vibration compaction of road rollers, wherein the system comprises a control module and a compaction condition acquisition module, a vibration mechanism and a walking mechanism respectively connected to the control module; the compaction condition acquisition module is used to acquire compaction condition information and transmit the acquired information to the control module; the control module is used to receive the compaction condition information transmitted by the compaction condition acquisition module, determine the current vibration frequency according to the mapping relationship between the compaction condition information and the vibration frequency, obtain the corresponding current according to the vibration frequency, output the corresponding current control signal to the vibration mechanism, and match the corresponding walking speed and output the corresponding current control signal to the walking mechanism according to the mapping relationship between the preset vibration frequency and the walking speed. Adjust according to the compacted material, thickness and temperature from time to time to ensure that the compaction is in the best state and improve the compaction flatness and efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of road roller adaptive control, and in particular to a road roller vibration compaction adaptive control system and method. Background Art

[0002] When a double-steel-wheel roller is compacting, the material is compacted by the vibration of the steel wheel. The vibration frequency has a great influence on the relative movement of the compressed material. When the vibration frequency is the same as that of the vibrating roller and the compressed material, as the vibrating wheel vibrates, the movement trend of the compressed material increases, the internal resistance decreases sharply, and the shear force on the compressed material increases, which can obtain the best compaction quality. However, the natural frequencies of the compressed materials vary greatly. Traditional double-steel-wheel rollers generally have two vibration frequencies, which cannot meet the optimal compaction requirements under various working conditions.

[0003] During the vibration compaction process of the double steel wheels, the asphalt material being compacted is soft. In order to ensure that the roller does not push the compacted material when starting and stopping, causing uneven road surface, the driver is required to start and stop slowly during the compaction process; generally, during the first two times of compaction, the asphalt temperature is high and the material is soft, so the start and stop time is long; as the temperature decreases, the compaction variables increase, and the start and stop speed can be appropriately accelerated. When a traditional roller is compacted, the start and stop time is adjusted by the driver through the joystick, which has high requirements for the driver's operation and is prone to causing uneven road surface or low compaction efficiency. Summary of the invention

[0004] The present invention combines the construction technology of a double-steel-wheel roller and automatically matches and controls the frequency and speed of the roller according to different compaction conditions. At the same time, the start and stop speeds can be adjusted to ensure that the roller is at the best compaction quality and efficiency. The present invention specifically provides a vibration compaction adaptive control system and method for a roller.

[0005] The technical solution of the present invention is:

[0006] In a first aspect, the technical solution of the present invention provides a road roller vibration compaction adaptive control system, including a compaction condition acquisition module, a control module, a vibration mechanism and a travel mechanism;

[0007] The compaction condition acquisition module, the vibration mechanism and the walking mechanism are respectively connected to the control module for communication;

[0008] A compaction condition collection module, used to collect compaction condition information and transmit the collected information to the control module;

[0009] A control module is used to receive the compaction condition information transmitted by the compaction condition acquisition module, determine the current vibration frequency according to the mapping relationship between the compaction condition information and the vibration frequency, obtain the corresponding current according to the vibration frequency, output the corresponding current control signal to the vibration mechanism, and at the same time, match the corresponding walking speed according to the preset mapping relationship between the vibration frequency and the walking speed and output the corresponding current control signal to the walking mechanism;

[0010] A vibration mechanism, used to adjust the corresponding vibration frequency according to the current control signal corresponding to the vibration frequency output by the control module, and work according to the adjusted frequency;

[0011] The walking mechanism is used to adjust the walking speed according to the current control signal corresponding to the walking speed output by the control module, and work according to the adjusted walking speed.

[0012] Preferably, the compaction condition acquisition module includes a compaction material detection sensor, a thickness detection sensor, and a temperature sensor;

[0013] The compacted material detection sensor, the thickness detection sensor, and the temperature sensor are respectively connected to the control module;

[0014] The control module is used to process the compacted material information detected by the compacted material detection sensor, the thickness information detected by the thickness detection sensor, and the temperature information detected by the temperature sensor, and perform weighted summation to calculate the working condition value, determine the current vibration frequency according to the mapping relationship between the preset working condition value and the vibration frequency, and determine the current walking speed according to the mapping relationship between the vibration frequency and the walking speed.

[0015] Preferably, the control module is specifically used to search a preset first data table according to the compacted material information detected by the compacted material detection sensor to obtain a first value corresponding to the compacted material information; search a preset second data table according to the thickness information detected by the thickness detection sensor to obtain a second value corresponding to the thickness information; search a preset third data table according to the temperature information detected by the temperature sensor to obtain a third value corresponding to the temperature information; multiply the first value, the second value, and the third value by the preset corresponding weights, respectively, and then sum them up to obtain the operating condition value.

[0016] Preferably, the control module is further used to adjust the start-stop speed output to the walking mechanism according to the mapping relationship between the working condition value and the start-stop speed.

[0017] Preferably, the vibration mechanism includes a frequency sensor, a vibration pump, a vibration motor and a vibration wheel; the frequency sensor is connected to the vibration motor to detect the real-time vibration frequency of the vibration motor;

[0018] The vibration pump is connected to the vibration wheel through the vibration motor;

[0019] The frequency sensor is connected to the control module and is used to feed back the detected vibration frequency to the control module;

[0020] The control module is connected to the vibration pump and is used to compare the determined vibration frequency with the current vibration frequency fed back by the frequency sensor. When the frequency needs to be adjusted, the control module outputs the corresponding vibration frequency current to the vibration pump, and the vibration pump drives the vibration wheel to vibrate at the determined vibration frequency through the vibration motor.

[0021] Preferably, the travel mechanism comprises a travel pump, a travel motor and a speed sensor connected to the travel motor for detecting the speed of the travel motor;

[0022] The speed sensor is connected to the control module and is used to feed back the detected walking speed to the control module;

[0023] The travel pump is connected to the travel motor; the travel motor is connected to the vibration wheel to drive the vibration wheel to travel;

[0024] The control module is connected with the travel pump;

[0025] The control module is used to compare the matched walking speed with the walking speed fed back by the speed sensor. When the walking speed needs to be adjusted, the output signal adjusts the working current of the walking pump; so that the walking pump drives the vibration wheel to walk at the matched walking speed through the walking motor.

[0026] Preferably, the control module is further used to, after determining the start-stop speed, take the time derivative of the start-stop current corresponding to the determined start-stop speed to generate a start-stop current slope and output it to the travel pump.

[0027] Preferably, the system further comprises a display module connected to the control module;

[0028] The display module is used to display the current working status information of the roller.

[0029] Preferably, the system further comprises a start-stop speed adjustment switch and a vibration frequency adjustment switch respectively connected to the control module; and is used to adjust the start-stop speed and vibration frequency by manually operating the corresponding switch triggers.

[0030] In a second aspect, the technical solution of the present invention further provides a method for adaptive control of vibration compaction of a road roller, comprising the following steps:

[0031] Collect compaction condition information;

[0032] When judging the first compaction operation, the start and stop speed and vibration frequency are selected and output to the vibration mechanism and the travel mechanism accordingly;

[0033] When it is determined that the vibration frequency needs to be adjusted according to the collected compaction condition information, the current vibration frequency is determined according to the mapping relationship between the compaction condition information and the vibration frequency, the corresponding current is obtained according to the determined vibration frequency, and the corresponding current control signal is output to the vibration mechanism. At the same time, according to the preset mapping relationship between the vibration frequency and the walking speed, the corresponding walking speed is matched and the corresponding current control signal is output to the walking mechanism;

[0034] When it is determined that the start-stop speed needs to be adjusted based on the collected compaction condition information, the current condition value is calculated based on the compaction condition information, and the start-stop speed is determined and output to the walking mechanism based on the mapping relationship between the preset condition value and the start-stop speed.

[0035] It can be seen from the above technical solutions that the present invention has the following advantages: it can be adjusted in real time according to the compacted material, thickness and temperature to ensure that the compaction is in the best state and to improve the compaction flatness and efficiency.

[0036] In addition, the invention has a reliable design principle, a simple structure and a very broad application prospect.

[0037] It can be seen that compared with the prior art, the present invention has outstanding substantive features and significant progress, and the beneficial effects of its implementation are also obvious. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1 is a schematic block diagram of a system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0041] like Figure 1 As shown, an embodiment of the present invention provides a vibration compaction adaptive control system for a road roller, including a compaction condition acquisition module, a control module, a vibration mechanism and a travel mechanism;

[0042] The compaction condition acquisition module, the vibration mechanism and the walking mechanism are respectively connected to the control module for communication;

[0043] A compaction condition collection module, used to collect compaction condition information and transmit the collected information to the control module;

[0044] A control module is used to receive the compaction condition information transmitted by the compaction condition acquisition module, determine the current vibration frequency according to the mapping relationship between the compaction condition information and the vibration frequency, obtain the corresponding current according to the vibration frequency, output the corresponding current control signal to the vibration mechanism, and at the same time, match the corresponding walking speed according to the preset mapping relationship between the vibration frequency and the walking speed and output the corresponding current control signal to the walking mechanism;

[0045] A vibration mechanism, used to adjust the corresponding vibration frequency according to the current control signal corresponding to the vibration frequency output by the control module, and work according to the adjusted frequency;

[0046] The walking mechanism is used to adjust the walking speed according to the current control signal corresponding to the walking speed output by the control module, and work according to the adjusted walking speed.

[0047] Collect compaction condition information; when judging the first compaction operation, select the start and stop speeds and vibration frequencies to be output to the vibration mechanism and the walking mechanism accordingly; when judging that the vibration frequency needs to be adjusted based on the collected compaction condition information, determine the current vibration frequency based on the mapping relationship between the compaction condition information and the vibration frequency, output the vibration frequency to the vibration mechanism, and at the same time, match the corresponding walking speed based on the preset mapping relationship between the vibration frequency and the walking speed and output it to the walking mechanism; when judging that the start and stop speed adjustment needs to be made based on the compaction condition information, output the corresponding current slope.

[0048] In some embodiments, the compaction condition acquisition module includes a compaction material detection sensor, a thickness detection sensor, and a temperature sensor;

[0049] The compacted material detection sensor, the thickness detection sensor, and the temperature sensor are respectively connected to the control module;

[0050] The control module is used to process the compacted material information detected by the compacted material detection sensor, the thickness information detected by the thickness detection sensor, and the temperature information detected by the temperature sensor, and perform weighted summation to calculate the working condition value, determine the current vibration frequency according to the mapping relationship between the preset working condition value and the vibration frequency, and determine the current walking speed according to the mapping relationship between the vibration frequency and the walking speed.

[0051] In some embodiments, the control module is specifically used to search a preset first data table according to the compacted material information detected by the compacted material detection sensor to obtain a first value corresponding to the compacted material information; search a preset second data table according to the thickness information detected by the thickness detection sensor to obtain a second value corresponding to the thickness information; search a preset third data table according to the temperature information detected by the temperature sensor to obtain a third value corresponding to the temperature information; multiply the first value, the second value, and the third value by the preset corresponding weights, respectively, and then sum them up to obtain the operating condition value.

[0052] In some embodiments, the control module is further used to adjust the start-stop speed output to the walking mechanism according to the mapping relationship between the working condition value and the start-stop speed.

[0053] In some embodiments, the vibration mechanism includes a frequency sensor, a vibration pump, a vibration motor and a vibration wheel; the frequency sensor is connected to the vibration motor to detect the real-time vibration frequency of the vibration motor;

[0054] The vibration pump is connected to the vibration wheel through the vibration motor;

[0055] The frequency sensor is connected to the control module and is used to feed back the detected vibration frequency to the control module;

[0056] The control module is connected to the vibration pump and is used to compare the determined vibration frequency with the current vibration frequency fed back by the frequency sensor. When the frequency needs to be adjusted, the control module outputs the corresponding vibration frequency current to the vibration pump, and the vibration pump drives the vibration wheel to vibrate at the determined vibration frequency through the vibration motor.

[0057] In some embodiments, the travel mechanism includes a travel pump, a travel motor, and a speed sensor connected to the travel motor for detecting the speed of the travel motor;

[0058] The speed sensor is connected to the control module and is used to feed back the detected walking speed to the control module;

[0059] The travel pump is connected to the travel motor; the travel motor is connected to the vibration wheel to drive the vibration wheel to travel;

[0060] The control module is connected with the travel pump;

[0061] The control module is used to compare the matched walking speed with the walking speed fed back by the speed sensor. When the walking speed needs to be adjusted, the output signal adjusts the working current of the walking pump; so that the walking pump drives the vibration wheel to walk at the matched walking speed through the walking motor.

[0062] In some embodiments, the control module is further used to, after determining the start-stop speed, take the time derivative of the start-stop current corresponding to the determined start-stop speed to generate a start-stop current slope and output it to the travel pump.

[0063] In some embodiments, the system further comprises a display module connected to the control module;

[0064] The display module is used to display the current working status information of the roller.

[0065] In some embodiments, the system further comprises a start-stop speed adjustment switch and a vibration frequency adjustment switch respectively connected to the control module; and is used to adjust the start-stop speed and vibration frequency by manually operating the corresponding switch triggers.

[0066] In some embodiments, the control module receives signals inputted through the start-stop speed adjustment switch and the vibration frequency adjustment switch, and before compaction begins, the start-stop speed and vibration frequency are selected according to the compaction conditions: compacted material, ply thickness, temperature, etc. The start-stop speed is divided into: soft, relatively soft, and hard, and the control module outputs the corresponding start-stop current slope to achieve slow, relatively slow, and fast start-stop speeds (Note: more gears can be added to this process as needed).

[0067] Frequency adjustment: The vibration frequency can be set on the display module. The vibration frequency corresponds to the vibration pump current and is controlled in a closed-loop manner. The vibration frequency forms a two-dimensional lookup table to determine the control current and achieve stepless adjustment of the frequency from 40 to 70 Hz. Corresponding to different vibration frequencies, the control module gives corresponding walking speed control.

[0068] After confirming the input, push the forward and backward handles to start the vibration switch. At this time, the controller supplies proportional travel and vibration pump vibration corresponding control current to match the vibration frequency with the travel speed. At the same time, the start and stop speeds are adjusted according to the hardness of the asphalt road surface, so that the compaction efficiency and effect of the roller reach the best state and efficiency.

[0069] The present invention combines the construction technology of a double-steel wheel roller and automatically matches and controls the vibration frequency and travel speed of the roller according to different compaction working condition information. The start and stop speeds can also be adjusted to ensure that the roller is at the best compaction quality and efficiency.

[0070] This solution uses an electronically controlled engine, an electric proportional hydraulic vibration pump, a travel pump, a hydraulic vibration motor, and a travel motor to form a power system. The vibration frequency and start-stop speed are set according to the construction condition information. The direction is controlled by the forward / reverse handle. The control module matches different travel speeds according to different vibration frequencies; according to the start-stop speed selection, the start and stop time of the roller are controlled.

[0071] The system includes a vibration frequency adjustment switch, a start-stop speed adjustment switch, a control module, an engine (not shown in the attached figure, but set in the existing manner), a vibration pump, a travel pump, a vibration motor and a travel motor, as well as a frequency sensor and a speed sensor; during the working process, only the working mode switch needs to be selected. After the working mode is selected, different vibration frequencies are adjusted according to different compaction working conditions (thickness, material, temperature, etc.), and the system cooperates with the corresponding travel speed; different start-stop speeds are adjusted to achieve different start-stop speeds; the forward and backward handles are pushed, and at this time the control module supplies power to the proportional travel pump, vibration pump, travel motor, and vibration motor signals, and the vibration frequency matches the travel speed and start-stop speed, so that the compaction efficiency and effect of the roller reach the best state and efficiency.

[0072] The benefit of the present invention is that it can be adjusted in real time according to the compacted material, thickness and temperature to ensure that the compaction is in the best state and efficiency.

[0073] In addition, an embodiment of the present invention further provides a road roller vibration compaction adaptive control method, comprising the following steps:

[0074] Step 1: Collect compaction condition information;

[0075] Step 2: When determining the first compaction operation, select the start and stop speed and vibration frequency to be output to the vibration mechanism and the travel mechanism;

[0076] Step 3: When it is determined that the vibration frequency needs to be adjusted according to the collected compaction condition information, the current vibration frequency is determined according to the mapping relationship between the compaction condition information and the vibration frequency, the corresponding current is obtained according to the determined vibration frequency, and the corresponding current control signal is output to the vibration mechanism. At the same time, according to the preset mapping relationship between the vibration frequency and the walking speed, the corresponding walking speed is matched and the corresponding current control signal is output to the walking mechanism;

[0077] Step 4: When it is determined that the start-stop speed needs to be adjusted based on the collected compaction condition information, the current condition value is calculated based on the compaction condition information, and the start-stop speed is determined and output to the walking mechanism based on the mapping relationship between the preset condition value and the start-stop speed.

[0078] Although the present invention has been described in detail by referring to the accompanying drawings and in combination with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, a person of ordinary skill in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions shall be within the scope of the present invention. Any person of ordinary skill in the art may easily think of changes or substitutions within the technical scope disclosed by the present invention, and these shall be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A road roller vibration compaction adaptive control system, characterized in that: It includes a compaction condition acquisition module, a control module, a vibration mechanism and a walking mechanism; The compaction condition acquisition module, the vibration mechanism and the walking mechanism are respectively connected to the control module for communication; A compaction condition collection module, used to collect compaction condition information and transmit the collected information to the control module; A control module is used to receive the compaction condition information transmitted by the compaction condition acquisition module, determine the current vibration frequency according to the mapping relationship between the compaction condition information and the vibration frequency, obtain the corresponding current according to the vibration frequency, output the corresponding current control signal to the vibration mechanism, and at the same time, match the corresponding walking speed according to the preset mapping relationship between the vibration frequency and the walking speed and output the corresponding current control signal to the walking mechanism; A vibration mechanism, used to adjust the corresponding vibration frequency according to the current control signal corresponding to the vibration frequency output by the control module, and work according to the adjusted frequency; A walking mechanism, used to adjust the walking speed according to the current control signal corresponding to the walking speed output by the control module, and work at the adjusted walking speed; The compaction condition acquisition module includes a compaction material detection sensor, a thickness detection sensor, and a temperature sensor; The compacted material detection sensor, the thickness detection sensor, and the temperature sensor are respectively connected to the control module; The control module is used to process the compacted material information detected by the compacted material detection sensor, the thickness information detected by the thickness detection sensor, and the temperature information detected by the temperature sensor, and perform weighted summation to calculate the working condition value, determine the current vibration frequency according to the mapping relationship between the preset working condition value and the vibration frequency, and determine the current walking speed according to the mapping relationship between the vibration frequency and the walking speed.

2. The road roller vibration compaction adaptive control system according to claim 1, characterized in that: The control module is specifically used to search a preset first data table according to the compacted material information detected by the compacted material detection sensor to obtain a first value corresponding to the compacted material information; search a preset second data table according to the thickness information detected by the thickness detection sensor to obtain a second value corresponding to the thickness information; search a preset third data table according to the temperature information detected by the temperature sensor to obtain a third value corresponding to the temperature information; multiply the first value, the second value, and the third value by the preset corresponding weights respectively, and then sum them up to obtain the working condition value.

3. The road roller vibration compaction adaptive control system according to claim 2, characterized in that: The control module is also used to adjust the start-stop speed output to the walking mechanism according to the mapping relationship between the working condition value and the start-stop speed.

4. The road roller vibration compaction adaptive control system according to claim 3, characterized in that: The vibration mechanism includes a frequency sensor, a vibration pump, a vibration motor and a vibration wheel; the frequency sensor is connected to the vibration motor to detect the real-time vibration frequency of the vibration motor; The vibration pump is connected to the vibration wheel through the vibration motor; The frequency sensor is connected to the control module and is used to feed back the detected vibration frequency to the control module; The control module is connected to the vibration pump and is used to compare the determined vibration frequency with the current vibration frequency fed back by the frequency sensor. When the frequency needs to be adjusted, the corresponding vibration frequency current is output to the vibration pump. The vibration pump drives the vibration wheel to vibrate at the determined vibration frequency through the vibration motor.

5. The road roller vibration compaction adaptive control system according to claim 4, characterized in that: The travel mechanism includes a travel pump, a travel motor and a speed sensor connected to the travel motor for detecting the speed of the travel motor; The speed sensor is connected to the control module and is used to feed back the detected walking speed to the control module; The travel pump is connected to the travel motor; the travel motor is connected to the vibration wheel to drive the vibration wheel to travel; The control module is connected with the travel pump; The control module is used to compare the matched walking speed with the walking speed fed back by the speed sensor. When the walking speed needs to be adjusted, the output signal adjusts the working current of the walking pump; so that the walking pump drives the vibration wheel to walk at the matched walking speed through the walking motor.

6. The road roller vibration compaction adaptive control system according to claim 5, characterized in that: The control module is also used to determine the start-stop speed, take the time derivative of the start-stop current corresponding to the determined start-stop speed to generate a start-stop current slope and output it to the travel pump.

7. The road roller vibration compaction adaptive control system according to claim 6, characterized in that: The system also includes a display module connected to the control module; The display module is used to display the current working status information of the roller.

8. The road roller vibration compaction adaptive control system according to claim 7, characterized in that: The system also includes a start-stop speed adjustment switch and a vibration frequency adjustment switch respectively connected to the control module; and is used to adjust the start-stop speed and vibration frequency by manually operating the corresponding switch triggers.

9. A road roller vibration compaction adaptive control method, characterized in that: The steps include: Collect compaction condition information; When judging the first compaction operation, the start and stop speed and vibration frequency are selected and output to the vibration mechanism and the travel mechanism accordingly; When it is determined that the vibration frequency needs to be adjusted according to the collected compaction condition information, the current vibration frequency is determined according to the mapping relationship between the compaction condition information and the vibration frequency, the corresponding current is obtained according to the determined vibration frequency, and the corresponding current control signal is output to the vibration mechanism. At the same time, according to the preset mapping relationship between the vibration frequency and the walking speed, the corresponding walking speed is matched and the corresponding current control signal is output to the walking mechanism; When it is determined that the start-stop speed needs to be adjusted according to the collected compaction working condition information, the current working condition value is calculated according to the compaction working condition information, and the start-stop speed is determined and output to the walking mechanism according to the mapping relationship between the preset working condition value and the start-stop speed; The method further comprises: The control module processes the compacted material information detected by the compacted material detection sensor, the thickness information detected by the thickness detection sensor, and the temperature information detected by the temperature sensor, and calculates the operating condition value by weighted summation, determines the current vibration frequency based on the mapping relationship between the preset operating condition value and the vibration frequency, and determines the current walking speed based on the mapping relationship between the vibration frequency and the walking speed.

Images