Automatic control system of double-steel-wheel road roller

Abstract

The invention discloses an automatic control system for a double-steel-wheel road roller, which is characterized in that a compaction degree detection module feeds back the compaction degree of a road surface in real time, signals are processed by a control module, electric signals are output to control the vibration of steel wheels of the road roller, the compaction speed is cooperatively controlled according to the vibration frequency, and a positioning module controls the positions of the front and rear steel wheels of the road roller. And the position of the road roller body is positioned, so that the road roller can automatically compact the road surface. Wherein the control module is used for processing a signal and sending an instruction to control the excitation frequency and amplitude of the road roller, the running speed, the number of compaction times and the steering direction of the road roller; the signal acquisition module is provided with a speed sensor for controlling the running speed of the road roller; the temperature sensor is used for detecting the temperature of pavement materials below the steel wheels; the positioning module is composed of a positioning system and an angular displacement sensor, and the angular velocity sensor is applied to steering control of the road roller and is fused with the positioning system to achieve trajectory tracking.

Description

Technical Field

[0001] This invention relates to the field of automatic control technology for road rollers, and specifically to an automatic control system for a double-drum road roller. Background Technology

[0002] Traditional double-drum roller compaction operations rely on manual experience, resulting in uneven compaction, low efficiency, susceptibility to over- or under-compaction, difficulty in precise steering control, and insufficient response to material temperature changes. To address these issues, this invention proposes an automatic control system for double-drum rollers based on a microcontroller core. This system uses an accelerometer to detect drum vibration in real time and analyzes the compaction degree. Combined with speed and temperature sensor signals, as well as attitude and position information provided by a positioning / angular displacement module, the control module comprehensively analyzes and processes the data, ultimately outputting control commands to adjust the roller's excitation frequency and amplitude, travel speed, number of compaction passes, and steering, achieving automated and precise control of the compaction process and displaying the working status in real time. Summary of the Invention

[0003] The purpose of this invention is to provide an automatic control system for a double-drum roller, which enables automatic road surface compaction by the double-drum roller.

[0004] To achieve the above objectives, the present invention provides the following technical solution: The present invention provides an automatic control system for a double-drum road roller, characterized by: a control module, a compaction degree detection module, a signal acquisition module, and a positioning module. The control module uses a microcontroller as its control core; the compaction degree detection module mainly senses vibration acceleration through an accelerometer; the signal acquisition module consists of a velocity sensor and a temperature sensor; and the positioning module consists of a positioning system and an angular displacement sensor.

[0005] The compaction detection module detects the compaction degree of the road surface, and the signal is fed back to the control module for signal processing by a microcontroller. The electrical signal controls the hydraulic valves in the hydraulic system of the road roller to control the travel speed, number of compaction passes, and vibration frequency of the road roller.

[0006] The aforementioned compaction degree detection module includes an accelerometer that senses vibration acceleration signals, extracts fundamental / second harmonic parameters through signal conditioning, analyzes the mapping relationship between the fundamental and / or second harmonic amplitude parameters and pavement stiffness, and thus obtains the pavement compaction degree.

[0007] The driving wheel of the double steel drum roller is the front wheel. An acceleration sensor and a temperature sensor are installed on the front wheel of the vibrating steel drum. The acceleration sensor detects the vibration signal of the steel drum and feeds it back to the control module; the temperature sensor is used to detect the temperature of the road surface material under the steel drum and feed it back to the control module.

[0008] The angular displacement sensor is installed on the steering mechanism of the hinge frame of the double drum roller. Based on the path information provided by the positioning system, the current turning angle information provided by the angular displacement sensor, and the wheelbase of the front and rear drums of the double drum roller, the target steering angle is calculated, and a control signal is output to the steering proportional valve drive circuit to realize the steering control of the roller.

[0009] The temperature sensor signal feedback during the compaction process is manifested in observing whether the road surface compaction temperature is in the unstable range of asphalt compaction, and automatically adjusting the starting acceleration, vibration mode or number of compaction passes according to the temperature.

[0010] The control module is connected to the display screen to show the working status of the road roller in real time.

[0011] The automatic compaction of the double-drum roller is based on real-time feedback signals from temperature sensors and compaction degree detection modules. The control module receives information to determine the compaction degree and road surface temperature, and outputs control commands to adjust the roller's travel speed, vibration frequency, number of compaction passes, and steering control. Attached Figure Description

[0012] Figure 1 This is the control flowchart of the present invention; Figure 2 This is a diagram of the compaction degree detection device of the present invention; Detailed Implementation

[0013] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0014] The automatic control system for a double-drum roller of the present invention is implemented through the following steps: the system includes a control module, a compaction degree detection module, a signal acquisition module, and a positioning module. The control module uses a microcontroller as its control core; the compaction degree detection module mainly senses vibration acceleration through an accelerometer; the signal acquisition module collects real-time data from a velocity sensor and a temperature sensor; the positioning module consists of a positioning system and an angular displacement sensor, as shown in the flowchart below. Figure 1 As shown.

[0015] The compaction detection module detects the compaction degree of the road surface, and the signal is fed back to the control module for signal processing by a microcontroller. The electrical signal controls the hydraulic valves in the hydraulic system of the road roller to control the travel speed, number of compaction passes, and vibration frequency of the road roller.

[0016] The compaction degree detection module includes an accelerometer that senses vibration acceleration signals. The signal is modulated to extract fundamental / second harmonic parameters. By analyzing the mapping relationship between the fundamental and / or second harmonic amplitude parameters and the road surface stiffness, the road surface compaction degree is obtained. The compaction degree detection device is as follows: Figure 2 As shown.

[0017] The driving wheel of the double steel drum roller is the front wheel. An acceleration sensor and a temperature sensor are installed on the front wheel of the vibrating steel drum. The acceleration sensor detects the vibration signal of the steel drum and feeds it back to the control module; the temperature sensor is used to detect the temperature of the road surface material under the steel drum and feed it back to the control module.

[0018] The angular displacement sensor is installed on the steering mechanism of the double-drum roller's hinge frame. Based on the path information provided by the positioning system, the current steering angle information provided by the angular displacement sensor, and the wheelbase of the front and rear drums of the double-drum roller, the target steering angle is calculated, and a control signal is output to the steering proportional valve drive circuit to achieve roller steering control. The steering angle calculation formula is:

[0019] Where L is the wheelbase between the front and rear steel wheels, and R is the radius of curvature of the curve. The temperature sensor signal feedback during the compaction process is manifested in observing whether the road surface compaction temperature is in the unstable range of asphalt compaction, and automatically adjusting the starting acceleration, vibration mode or number of compaction passes according to the temperature.

[0020] The control module is connected to the display screen to show the working status of the road roller in real time.

[0021] The automatic compaction of the double-drum roller is based on real-time feedback signals from temperature sensors and compaction degree detection modules. The control module receives information to determine the compaction degree and road surface temperature, and outputs control commands to adjust the roller's travel speed, vibration frequency, number of compaction passes, and steering control.

[0022] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. An automatic control system for a double-drum roller, characterized in that... include: The system comprises a control module, a compaction degree detection module, a signal acquisition module, and a positioning module. The control module uses a microcontroller as its core; the compaction degree detection module primarily senses vibration acceleration through an accelerometer; the signal acquisition module consists of a velocity sensor and a temperature sensor; and the positioning module comprises a positioning system and an angular displacement sensor.

2. The automatic control system for a double-drum road roller according to claim 1, characterized in that: The compaction detection module detects the compaction degree of the road surface and feeds the signal back to the control module. The microcontroller processes the signal and outputs an electrical signal to control the hydraulic valves in the hydraulic system of the road roller, thereby controlling the excitation frequency and amplitude, travel speed, number of compaction passes, and steering of the road roller.

3. The automatic control system for a double-drum roller according to claim 1, characterized in that: The driving wheel of the double drum roller is the front wheel. Acceleration sensors and temperature sensors are installed on the front wheel of the vibrating drum. The acceleration sensor detects the vibration signal of the drum and feeds it back to the control module. Temperature sensors are used to detect the temperature of the road surface material beneath the steel wheel and feed it back to the control module.

4. The automatic control system for a double-drum roller according to claims 1 and 3, further comprising: The compaction detection module mentioned above uses an accelerometer to sense vibration acceleration signals, and the signal is modulated to extract fundamental / second harmonic parameters. By analyzing the mapping relationship between the fundamental amplitude and / or second harmonic amplitude parameters and the road surface stiffness, the road surface compaction is obtained.

5. The automatic control system for a double-drum roller according to claims 1 and 3, further comprising: Temperature sensor signal feedback during the compaction process is manifested in observing whether the road surface compaction temperature is within the unstable range of asphalt compaction, and automatically adjusting the starting acceleration, vibration mode, or number of compaction passes based on the temperature.

6. The automatic control system for a double-drum roller according to claim 1, characterized in that: The angular displacement sensor is installed on the steering mechanism of the hinge frame of the double-drum roller.

7. An automatic control system for a double-drum roller according to claims 1 and 6, characterized in that: Based on the path information provided by the positioning system, the current turning angle information provided by the angular displacement sensor, and the wheelbase of the front and rear steel wheels of the double steel drum roller, the target turning angle is calculated, and the control signal is output to the steering proportional valve drive circuit to realize the steering control of the roller.

8. The automatic control system for a double-drum roller according to claim 1, characterized in that: The control module is connected to the display screen to show the working status of the road roller in real time.

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