A paver and its vibration speed control method

Abstract

The present application discloses a paver and a vibration speed control method thereof. The paver includes a vibration speed controller, a memory, and a vibration speed sensor. The vibration speed controller is electrically connected to the memory, the vibration speed sensor, and the vibration drive respectively. The vibration drive is drivingly connected to a vibration device. The vibration device is made to traverse each vibration speed and / or the vibration drive is made to traverse each vibration speed control amount, the corresponding relationship between each vibration speed and the vibration speed control amount is obtained, and the obtained corresponding relationship is stored in the memory. The vibration speed controller adjusts the vibration speed control amount sent to the vibration drive at least based on the corresponding relationship between the vibration speed and the vibration speed control amount stored in the memory to adjust the vibration speed of the vibration device. The present invention also relates to a vibration speed control method for a paver. In particular, the present invention can accurately control the vibration speed of the vibration device during the starting stage of the paver, which is beneficial to improving the paving quality of the road surface.

Description

Technical Field

[0001] The present invention relates to the technical field of paver vibration, and particularly to a paver and a method for controlling the vibration speed thereof. Background Art

[0002] As an important mechanism on a paver, the vibration device includes an eccentric shaft, a fixed bearing seat, a movable bearing seat, bearings, a vibration beam, etc. The rotation of the eccentric shaft drives the vibration beam to move up and down to pre-compact the paving material. The vibration device is usually driven by a vibration drive, such as a pump and a motor, and the vibration speed can be adjusted by adjusting the displacement of the pump; in some cases, the pump displacement is fixed, and the vibration drive can include a flow valve, and the vibration speed can also be adjusted through the flow valve.

[0003] During the paving process, ensuring the consistency of the compaction degree of the paved road surface is of great significance for the final quality and service life of the road surface. The patent with the application number CN200810086652.6 discloses a technical solution that correlates the vibration speed with the traveling speed to improve the compaction degree consistency.

[0004] In the prior art, it is known to measure the actual vibration speed through a vibration speed sensor and perform closed-loop control, which is beneficial to ensuring that the vibration speed is within an ideal range. However, there are still areas for improvement in the prior art. During the construction process, the paver and its vibration device often have to start and stop multiple times. However, there are phenomena of overshoot and too long adjustment time in the starting stage of the current vibration device, which is not conducive to further improving the paving quality of the road surface. Summary of the Invention

[0005] The purpose of this application is to overcome the deficiencies in the prior art and provide a paver and a method for controlling the vibration speed thereof, which can regulate the vibration speed of the vibration device of the paver.

[0006] To achieve the above purpose, the present invention is implemented by the following technical solutions:

[0007] On the one hand, the present invention provides a paver, including a vibration device and a vibration drive. The vibration device is used for initially compressing the paving material, and the vibration drive is used to provide driving force for the vibration device and adjust the vibration speed. It is characterized in that: it further includes a vibration speed controller, a memory, and a vibration speed sensor;

[0008] The vibration speed sensor is used to measure the vibration speed of the vibration device;

[0009] The vibration speed controller is electrically connected to the memory, the vibration speed sensor, and the vibration drive respectively;

[0010] The vibration drive is drivingly connected to the vibration device to cause the vibration device to traverse each vibration rotation speed and / or cause the vibration drive to traverse each vibration rotation speed control amount, obtain the corresponding relationship between each vibration rotation speed and the vibration rotation speed control amount, and store the obtained corresponding relationship in a memory;

[0011] The vibration rotation speed controller regulates the vibration rotation speed control amount sent to the vibration drive based at least on the corresponding relationship between the vibration rotation speed and the vibration rotation speed control amount stored in the memory to regulate the vibration rotation speed of the vibration device.

[0012] Further, the vibration drive includes a vibration pump and a vibration motor;

[0013] The output end of the vibration rotation speed controller is connected to the vibration pump, the vibration pump is drivingly connected to the vibration motor, and the vibration motor is drivingly connected to the vibration device;

[0014] The vibration rotation speed controller regulates the vibration rotation speed of the vibration device by controlling the vibration rotation speed control amount of the vibration pump.

[0015] Further, the paver further includes a timer;

[0016] The vibration rotation speed controller is electrically connected to the timer.

[0017] Further, the vibration rotation speed controller, the memory, and the timer are integrated into one body.

[0018] On the other hand, the present invention provides a method for controlling the vibration rotation speed of a paver, including the following steps:

[0019] Using the vibration rotation speed controller to control the vibration drive to cause the vibration device to traverse each vibration rotation speed and / or cause the vibration drive to traverse each vibration rotation speed control amount, obtain the corresponding relationship between the vibration rotation speed and the vibration rotation speed control amount, and store the corresponding relationship between the vibration rotation speed and the vibration rotation speed control amount in a memory;

[0020] The vibration rotation speed controller controls the vibration drive based at least on the corresponding relationship between the vibration rotation speed and the vibration rotation speed control amount stored in the memory to adjust the vibration rotation speed.

[0021] Further, the vibration rotation speed controller controls the vibration drive based at least on the corresponding relationship between the vibration rotation speed and the vibration rotation speed control amount stored in the memory to adjust the vibration rotation speed, including:

[0022] When starting the vibration device, based on the corresponding relationship between the vibration rotation speed and the vibration rotation speed control amount, the vibration rotation speed controller uses the vibration rotation speed target value to determine the initial vibration rotation speed control amount;

[0023] The vibration rotation speed controller uses the initial vibration rotation speed control amount to control the vibration drive to regulate the vibration rotation speed of the vibration device;

[0024] After a set time or when the real-time vibration speed stabilizes, compare the real-time vibration speed with the target vibration speed, and control the vibration drive according to the comparison result to adjust the vibration speed so that the real-time vibration speed tends to the target vibration speed;

[0025] Among them, the target vibration speed can be manually input or automatically generated by the program.

[0026] Furthermore, the set time is related to the target vibration speed.

[0027] Furthermore, the set time is proportional to the target vibration speed.

[0028] Furthermore, comparing the real-time vibration speed with the target vibration speed, and controlling the vibration drive according to the comparison result to adjust the vibration speed so that the real-time vibration speed tends to the target vibration speed includes:

[0029] When the real-time vibration speed measured by the vibration speed sensor is higher than the target vibration speed, the vibration speed controller reduces the vibration speed control amount transmitted to the vibration drive to reduce the vibration speed;

[0030] When the real-time vibration speed measured by the vibration speed sensor is lower than the target vibration speed, the vibration speed controller increases the vibration speed control amount transmitted to the vibration drive to increase the vibration speed.

[0031] Compared with the prior art, the beneficial effects achieved by the present invention:

[0032] During the starting stage of the paver, the vibration speed of the vibration device can be accurately controlled, overshoot can be avoided, and the vibration speed adjustment time can be reduced, which is beneficial to improving the pavement paving quality; it does not require the consumption of personnel energy, and the calibration of the corresponding relationship between the vibration speed and the vibration speed control amount is automatically realized through the program, and it is applicable to different models and configurations; in the unexpected situation that the vibration speed controller fails, the vibration speed can still be controlled more accurately through the corresponding relationship between the vibration speed and the vibration speed control amount. Description of the Drawings

[0033] Figure 1 It is a connection diagram of the paver. Detailed Embodiments

[0034] Embodiment 1

[0035] This embodiment provides a paver.

[0036] The paver of this embodiment includes a vibration device and a vibration drive. Among them, the vibration device is used for preliminary compaction of the paving material, and the vibration drive is used to provide driving force for the vibration device and adjust the vibration speed.

[0037] Reference Figure 1 Figure 1 , the paver of this embodiment further includes a vibration speed controller, a memory, and a vibration speed sensor. Among them, the vibration speed sensor is used to measure the vibration speed of the vibration device; the vibration speed controller is electrically connected to the memory, the vibration speed sensor, and the vibration drive respectively; the vibration drive is drivingly connected to the vibration device.

[0038] In application, the vibration device traverses each vibration speed and / or the vibration drive traverses each vibration speed control amount, obtains the corresponding relationship between each vibration speed and the vibration speed control amount, and stores the obtained corresponding relationship in the memory; the vibration speed controller adjusts the vibration speed control amount sent to the vibration drive at least based on the corresponding relationship between the vibration speed and the vibration speed control amount stored in the memory to adjust the vibration speed of the vibration device. Among them, the vibration speed control amount refers to the control amount used to control the displacement of the vibration pump or the flow rate of the electromagnetic flow valve, and the vibration speed control amount is current, voltage or other control signals. In actual application, the vibration drive includes a vibration pump, a vibration motor, and necessary pipelines. The output end of the vibration speed controller is connected to the vibration pump, the vibration pump is drivingly connected to the vibration motor, and the vibration motor is drivingly connected to the vibration device. Preferably, the displacement of the vibration pump can be adjusted electronically, so that the vibration speed can be adjusted.

[0039]

[0038] In actual application of this embodiment, the vibration pump can also be of a fixed displacement. At this time, the vibration drive further includes an electromagnetic flow valve, and the vibration speed of the vibration device is adjusted through the electromagnetic flow valve.

[0040] Reference Figure 1

[0040] , the paver of this embodiment further includes a timer, and the vibration speed controller is electrically connected to the timer. The vibration speed controller, the timer, and the memory can be spatially separated, but preferably can be integrated into one body. The control system of modern pavers usually has the functions of control, timing, and storage. There is no need to additionally set up a dedicated vibration speed controller, timer, and memory, and the vibration speed can also be controlled through the control system of the existing paver.

[0041] Figure 1 In application, the vibration speed sensor can have different types such as mechanical, electromagnetic, and light-sensing types, can be integrated on the vibration motor, or can be set separately.

[0042] Embodiment 2

[0043]

[0042] On the basis of Embodiment 1, this embodiment provides a method for controlling the vibration speed of a paver.

[0044] The method for controlling the vibration speed of the paver in this embodiment includes the following steps:

[0045] S1 Use the vibration speed controller to control the vibration drive so that the vibration device traverses each vibration speed and / or so that the vibration drive traverses each vibration speed control amount, obtain the corresponding relationship between the vibration speed and the vibration speed control amount, and store the corresponding relationship between the vibration speed and the vibration speed control amount in the memory;

[0046] S2 The vibration speed controller controls the vibration drive to adjust the vibration speed at least based on the corresponding relationship between the vibration speed and the vibration speed control amount stored in the memory.

[0047] It is easily understandable that although it is feasible for the vibration speed controller to control the vibration device to traverse each vibration speed and / or each vibration speed control amount to calibrate the corresponding relationship between the two before each construction, it is unnecessary in most cases. Usually, before the paver leaves the factory, the manufacturer inputs control instructions to perform initial automatic calibration on the corresponding relationship between the vibration speed and the vibration speed control amount. After that, the vibration speed controller can control the vibration speed according to the corresponding relationship between the vibration speed and the vibration speed control amount stored in the memory. In exceptional cases, such as when the user changes the configuration of the paver, the user can also input control instructions to perform automatic calibration on the corresponding relationship between the vibration speed and the vibration speed control amount again.

[0048] It is easily understandable that "traversing" does not mean experiencing every vibration speed and / or vibration speed adjustment amount value, and it is sufficient to experience a sufficient number of representative discrete points. For example, when the designed range of the vibration speed is from 500 r / min to 1800 r / min, record once every 50 r / min or 100 r / min starting from 500 r / min until 1800 r / min.

[0049] The corresponding relationship between the vibration speed and the vibration speed control amount can be stored in the memory in the form of a function or a mapping relationship of several discrete points. When stored in the form of a function, the corresponding vibration speed control amount, i.e., the initial vibration speed control amount, can be easily obtained through the target value of the vibration speed; when stored in the form of a mapping relationship of several discrete points, the initial vibration speed control amount can be obtained according to the target value of the vibration speed through interpolation. During the construction process, due to reasons such as waiting for the material truck and replacing the material truck, the paver and its vibration device often have to start and stop multiple times. When the paver starts moving forward again for paving and starts the vibration device, first, based on the corresponding relationship between the vibration speed and the vibration speed control amount, the vibration speed controller uses the target value of the vibration speed to determine the initial vibration speed control amount; then, the vibration speed controller uses the initial vibration speed control amount to control the vibration drive to adjust the vibration speed of the vibration device; then, after a set time or when the real-time vibration speed is stable, compare the size between the real-time vibration speed and the target value of the vibration speed, and control the vibration drive according to the comparison result to adjust the vibration speed so that the real-time vibration speed tends to the target value of the vibration speed; among them, the target value of the vibration speed can be manually input or automatically generated by the program.

[0050] In practical applications, after a set time or when the real-time vibration speed is stable, the commonly used closed-loop control strategy for the vibration speed in the industry can be adopted at this time. It can be seen that this embodiment combines open-loop control and closed-loop control.

[0051] Compared with blindly performing closed-loop control at the startup stage of the vibration device, for example, using the PID algorithm, first open-loop control the vibration drive through the initial vibration speed control amount, and then transfer to closed-loop control after a set time, which can well avoid overshoot or long-term failure to reach the target, thereby improving the compaction consistency at the startup stage. The set time can be a fixed value such as 300 ms or 600 ms. However, preferably, the set time is associated with the target value of the vibration speed, and the higher the target value of the vibration speed, the longer the set time. It is easy to understand that there is an acceleration process for the vibration speed at the startup stage, and the higher the speed, the longer the required acceleration time.

[0052] The set time can be proportional to the target value of the vibration speed. Of course, it can also be other positive correlation relationships according to specific situations.

[0053] The target value of the vibration speed is usually manually input, or can also be automatically generated by the vibration speed controller according to the pre-set program and relevant parameters.

[0054] When the vibration device starts, the vibration speed controller can directly transfer the initial vibration speed control amount to the vibration drive, or gradually increase the vibration speed control amount to the initial vibration speed control amount corresponding to the target value of the vibration speed in the form of a ramp or other functions within the set time.

[0055] After a set time or when the real-time vibration speed stabilizes, the vibration speed controller obtains the real-time vibration speed and compares the magnitude between the real-time vibration speed and the vibration speed target value:

[0056] When the real-time vibration speed measured by the vibration speed sensor is higher than the vibration speed target value, the vibration speed controller reduces the vibration speed control amount transmitted to the vibration drive to reduce the vibration speed;

[0057] When the real-time vibration speed measured by the vibration speed sensor is lower than the vibration speed target value, the vibration speed controller increases the vibration speed control amount transmitted to the vibration drive to increase the vibration speed.

Claims

1. A paver, comprising a vibrating device and a vibrating drive. The vibrating device is used for initially compacting paving materials, and the vibrating drive is used for providing driving force to the vibrating device and adjusting the vibrating speed. It is characterized in that: It further includes a vibration speed controller, a memory, and a vibration speed sensor; The vibration speed sensor is used to measure the vibration speed of the vibration device; The vibration speed controller is electrically connected to the memory, the vibration speed sensor, and the vibration drive respectively; The vibration drive is drivingly connected to the vibration device; The vibration speed controller controls the vibration drive to make the vibration device traverse each vibration speed and / or make the vibration drive traverse each vibration speed control amount, obtain the corresponding relationship between each vibration speed and the vibration speed control amount, and store the obtained corresponding relationship in the memory; The vibration speed controller regulates the vibration speed control amount sent to the vibration drive to regulate the vibration speed of the vibration device at least based on the corresponding relationship between the vibration speed and the vibration speed control amount stored in the memory, including: When starting the vibration device, based on the corresponding relationship between the vibration speed and the vibration speed control amount, the vibration speed controller uses the vibration speed target value to determine the initial vibration speed control amount; The vibration speed controller uses the initial vibration speed control amount to control the vibration drive in an open-loop control manner to regulate the vibration speed of the vibration device; After a set time or when the real-time vibration speed is stable, switch to closed-loop control, compare the size between the real-time vibration speed and the vibration speed target value, and control the vibration drive according to the comparison result to adjust the vibration speed so that the real-time vibration speed tends to the vibration speed target value; Among them, the vibration speed target value can be manually input or automatically generated by a program.

2. The paver according to claim 1, characterized in that, The vibration drive includes a vibration pump and a vibration motor; The output end of the vibration speed controller is connected to the vibration pump, the vibration pump is drivingly connected to the vibration motor, and the vibration motor is drivingly connected to the vibration device; The vibration speed controller regulates the vibration speed of the vibration device by controlling the vibration speed control amount of the vibration pump.

3. The paver according to claim 1, characterized in that, It further includes a timer; The vibration speed controller is electrically connected to the timer.

4. The paver according to claim 3, characterized in that, The vibration speed controller, the memory, and the timer are integrated into one.

5. A vibration speed control method for a paver, characterized in that, It includes the following steps: Use the vibration speed controller to control the vibration drive to make the vibration device traverse each vibration speed and / or make the vibration drive traverse each vibration speed control amount, obtain the corresponding relationship between the vibration speed and the vibration speed control amount, and store the corresponding relationship between the vibration speed and the vibration speed control amount in the memory; The vibration speed controller controls the vibration drive to adjust the vibration speed at least based on the corresponding relationship between the vibration speed and the vibration speed control amount stored in the memory, including: When starting the vibration device, based on the corresponding relationship between the vibration speed and the vibration speed control amount, the vibration speed controller uses the vibration speed target value to determine the initial vibration speed control amount; The vibration speed controller uses the initial vibration speed control amount to control the vibration drive in an open-loop control manner to regulate the vibration speed of the vibration device; After a set time or when the real-time vibration speed is stable, switch to closed-loop control, compare the size between the real-time vibration speed and the vibration speed target value, and control the vibration drive according to the comparison result to adjust the vibration speed so that the real-time vibration speed tends to the vibration speed target value; Among them, the vibration speed target value can be manually input or automatically generated by a program.

6. The vibrating speed control method of the paver according to claim 5, characterized in that, The set time is related to the target value of the vibration speed.

7. The vibrating speed control method of the paver according to claim 6, characterized in that, The set time is directly proportional to the target value of the vibration speed.

8. The vibration speed control method of the paver according to any one of claims 5 to 7, characterized in that Comparing the real-time vibration speed with the target value of the vibration speed and controlling the vibration drive according to the comparison result to adjust the vibration speed so that the real-time vibration speed tends to the target value of the vibration speed includes: When the real-time vibration speed measured by the vibration speed sensor is higher than the target value of the vibration speed, the vibration speed controller reduces the vibration speed control amount transmitted to the vibration drive to reduce the vibration speed; When the real-time vibration speed measured by the vibration speed sensor is lower than the target value of the vibration speed, the vibration speed controller increases the vibration speed control amount transmitted to the vibration drive to increase the vibration speed.

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