Electric heating control method and system for paver

Abstract

The invention discloses an electric heating control method and system for a paver, and belongs to the technical field of engineering machinery, and the electric heating control method for the paver comprises the following steps: based on the parameters of an electric heating element of the paver, the initial temperature of the electric heating element, the initial temperature of a target heating object and the working temperature of the target heating object; according to the method, the optimal heating strategy enabling the electric heating element to heat the target heating object from the initial temperature to the working temperature for the shortest time and the minimum energy consumption is determined, and the electric heating element is controlled to heat the target heating object according to the optimal heating strategy. The situation that the electric heating element works at the maximum power all the time is avoided, the service life of equipment is prolonged, and the problems that an existing paver cannot effectively adjust the heating process, the electric heating element works at the maximum limit temperature for a long time, power consumption of the equipment is too high, and the service life is shortened are solved.

Description

Technical Field

[0001] The invention relates to an electric heating control method and system for a paver, belonging to the technical field of engineering machinery. Background Art

[0002] When paving asphalt pavement, to ensure construction quality, the paver needs to heat the screed before or during paving. The heating principle of the screed is that the screed, as the heated component, needs to be heated by the heating element - the electric heating element - after being energized and heated, and then the heat is transferred to the component. Therefore, there is a temperature difference between the heated component and the temperature of the heating element. In actual operation, when the electric heating element is continuously energized, its temperature will continue to rise. When the electric heating element reaches the maximum limit temperature, the screed still has not reached the target temperature. In this case, the electric heating element is very easy to be damaged. Summary of the Invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a method and system for controlling electric heating of a paver, which takes into account the heating power consumption and heating time of the electric heating element, avoids the electric heating element from always working at maximum power, improves the life of the equipment, and solves the problem that the current paver cannot effectively adjust the heating process, causing the electric heating element to work at the maximum limit temperature for a long time, resulting in excessive power consumption and shortened life of the equipment.

[0004] In order to solve the above technical problems, the present invention is implemented by adopting the following technical solutions: In one aspect, the present invention provides a method for controlling electric heating of a paver, comprising: Obtaining parameters of the electric heating element of the paver, the initial temperature of the electric heating element, the initial temperature of the target heated object, and the operating temperature of the target heated object; Determine an optimal heating strategy based on parameters of the electric heating element of the paving machine, the initial temperature of the electric heating element, the initial temperature of the target heated object, and the operating temperature of the target heated object, so that the electric heating element heats the target heated object from the initial temperature to the operating temperature in the shortest time and with the lowest energy consumption; The electric heating element is controlled to heat the target object according to the optimal heating strategy.

[0005] Furthermore, the electric heating element parameters include a maximum allowable heating temperature of the element and a maximum operating voltage of the element.

[0006] Furthermore, the method of determining an optimal heating strategy that minimizes the time and energy consumption required for the electric heating element to heat the target object from the initial temperature to the operating temperature based on parameters of the electric heating element of the paving machine, the initial temperature of the electric heating element, the initial temperature of the target object, and the operating temperature of the target object includes: Use the maximum operating voltage of the element to heat the target object; If the initial temperature of the electric heating element rises to a predetermined element temperature threshold, the operating voltage of the electric heating element is reduced; The target object is continued to be heated using the reduced operating voltage of the electric heating element until the temperature of the target object is increased to the operating temperature.

[0007] Furthermore, the method for determining the predetermined component temperature threshold includes: Based on the maximum allowable heating temperature and the maximum operating voltage of the component, the maximum allowable heating temperature and the maximum operating voltage of the component are reduced according to a certain gradient to form a heating upper limit value group including multiple component heating upper limit values ​​and an operating voltage upper limit value group including multiple component operating voltage upper limit values; Based on the heating upper limit value group and the working voltage upper limit value group, calculate the total time and total energy consumption of heating the target heating object from the initial temperature to the working temperature at room temperature; The upper limit of component heating corresponding to the minimum heating time and total energy consumption is selected as the component temperature threshold.

[0008] Furthermore, the calculation of the total time and total energy consumption for heating the target heating object from the initial temperature to the operating temperature at room temperature based on the heating upper limit value group and the operating voltage upper limit value group includes: Cross-combining the heating upper limit value group and the working voltage upper limit value group; The electric heating element heats the target object at room temperature at the maximum operating voltage of the element. When the temperature of the electric heating element reaches the upper limit of the element heating corresponding to each combination, the operating voltage of the electric heating element is reduced. Lowering the operating voltage of the low-power heating element to the upper limit of the element operating voltage corresponding to each combination, and continuing to heat the target object until the target object is heated to the operating temperature; Calculate the total time and total energy consumption corresponding to each combined heating process.

[0009] Furthermore, if the initial temperature of the electric heating element rises to a predetermined element temperature threshold, reducing the operating voltage of the electric heating element comprises: Obtaining a first heating time for the electric heating element to heat the target object at the maximum operating voltage of the element under the current working condition, so that the initial temperature of the electric heating element is increased to a predetermined element temperature threshold; Obtaining a second heating time during which the electric heating element heats the target object at a maximum operating voltage of the element at room temperature, so that the initial temperature of the electric heating element rises to a predetermined element temperature threshold; The operating voltage of the electric heating element is reduced based on the first heating time, the second heating time, the predetermined element temperature threshold, and the upper limit of the element operating voltage corresponding to the predetermined element temperature threshold.

[0010] Furthermore, the reducing the operating voltage of the electric heating element based on the first heating time, the second heating time, the predetermined element temperature threshold, and the upper limit of the element operating voltage corresponding to the predetermined element temperature threshold includes: Calculating a voltage correction coefficient based on the first heating time, the second heating time, and a predetermined component temperature threshold; Calculate a corrected voltage value using a voltage correction coefficient and a component operating voltage upper limit corresponding to a predetermined component temperature threshold; Reduce the maximum operating voltage of the component to the corrected voltage value.

[0011] Furthermore, the calculating of the voltage correction coefficient according to the first heating time, the second heating time and a predetermined component temperature threshold includes: The voltage correction factor is calculated using the following formula: ; Indicates the voltage correction factor; represents the target correction factor; represents the correction base coefficient; ; represents a predetermined component temperature threshold, Indicates the initial temperature of the electric heating element under the current working conditions, Indicates the first heating time; ; Indicates the initial temperature of the electric heating element at room temperature, Indicates the second heating time.

[0012] Furthermore, the calculation of the corrected voltage value by using the voltage correction coefficient and the upper limit of the component operating voltage corresponding to the predetermined component temperature threshold comprises: The correction voltage is calculated using the following formula: ; Indicates the correction voltage; Indicates the voltage correction factor, Indicates the upper limit of the component operating voltage corresponding to a predetermined component temperature threshold.

[0013] The present invention also provides a paver electric heating control system, comprising: An acquisition module is used to obtain parameters of the electric heating element of the paver, an initial temperature of the electric heating element, an initial temperature of a target heated object, and an operating temperature of the target heated object; a processing module for determining an optimal heating strategy for enabling the electric heating element to heat the target object from the initial temperature to the operating temperature in the shortest time and with the lowest energy consumption based on parameters of the electric heating element of the paving machine, an initial temperature of the electric heating element, an initial temperature of the target object to be heated, and an operating temperature of the target object to be heated; The regulating module is used to control the electric heating element to heat the target heating object according to the optimal heating strategy.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention determines the optimal heating strategy that enables the electric heating element to heat the target object from the initial temperature to the operating temperature in the shortest time and with the lowest energy consumption based on the parameters of the electric heating element of the paver, the initial temperature of the electric heating element, the initial temperature of the target object to be heated and the operating temperature of the target object to be heated. The electric heating element is controlled to heat the target object to be heated according to the optimal heating strategy, and the heating power consumption and heating time of the electric heating element are taken into account, thereby avoiding the situation where the electric heating element always works at the maximum power, improving the life of the equipment, and solving the problem that the current paver cannot effectively adjust the heating process, causing the electric heating element to work at the maximum limit temperature for a long time, resulting in excessive power consumption of the equipment and shortened life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a flow chart of a method for controlling electric heating of a paver provided by an embodiment of the present invention; Figure 2 This is a flow chart of an optimal heating strategy in a method for controlling electric heating of a paver provided by an embodiment of the present invention; Figure 3 This is a flow chart of reducing the working voltage of an electric heating element in a method for controlling electric heating of a paver provided by an embodiment of the present invention;

[0016] Figure 4 It is a structural schematic diagram of an electric heating control system for a paver provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0018] Example 1 like Figure 1 As shown, a method for controlling electric heating of a paver includes: Obtaining parameters of the electric heating element of the paver, the initial temperature of the electric heating element, the initial temperature of the target heated object, and the operating temperature of the target heated object; In this embodiment, the electric heating element parameters include the maximum allowable heating temperature of the element and the maximum operating voltage of the element; Determine an optimal heating strategy based on parameters of the electric heating element of the paving machine, the initial temperature of the electric heating element, the initial temperature of the target heated object, and the operating temperature of the target heated object, so that the electric heating element heats the target heated object from the initial temperature to the operating temperature in the shortest time and with the lowest energy consumption; like Figure 2 As shown, the electric heating element is controlled to heat the target object according to the optimal heating strategy; wherein the optimal heating strategy is specifically: Use the maximum operating voltage of the element to heat the target object; Among them, the maximum operating voltage of the component is the maximum operating voltage of the equipment without affecting its life. Maintaining this voltage can make the electric heating element heat up quickly. If this voltage is used during the entire working process, it will affect the life of the equipment and consume a lot of energy in the long run. If the initial temperature of the electric heating element rises to a predetermined element temperature threshold, the operating voltage of the electric heating element is reduced; The predetermined component temperature threshold is determined by: Based on the maximum allowable heating temperature and the maximum operating voltage of the component, the maximum allowable heating temperature and the maximum operating voltage of the component are reduced according to a certain gradient to form a heating upper limit value group including multiple component heating upper limit values ​​and an operating voltage upper limit value group including multiple component operating voltage upper limit values; In this embodiment, the maximum allowable heating temperature of the component is Thm, the maximum operating voltage of the component is Vmax, the temperature reduction gradient is 5°C, and the voltage reduction gradient is 50V, forming a heating upper limit value group and an operating voltage upper limit value group.

[0019] Based on the heating upper limit value group and the operating voltage upper limit value group, the total time and total energy consumption of heating the target heating object from the initial temperature to the operating temperature at room temperature are calculated, including: As shown in Table 1, the heating upper limit value group and the working voltage upper limit value group are cross-combined; The electric heating element heats the target object at room temperature at the maximum operating voltage of the element. When the temperature of the electric heating element reaches the upper limit of the element heating corresponding to each combination, the operating voltage of the electric heating element is reduced. Lowering the operating voltage of the low-power heating element to the upper limit of the element operating voltage corresponding to each combination, and continuing to heat the target object until the target object is heated to the operating temperature; Calculate the total time and total energy consumption corresponding to each combined heating process; Select the upper limit of component heating corresponding to the minimum heating time and total energy consumption as the component temperature threshold; Table 1 Cross-combination In Table 1, Thm-5℃, Thm-10℃, and Thm-15℃ constitute the upper limit value group of the working voltage. Indicates the number of the heating upper limit value group n The upper limit value of heating of each component; Vmax-50V, Vmax-100V, Vmax-150V form the upper limit value group of working voltage, Indicates the upper limit value of the working voltage. n The upper limit of the operating voltage of each component; In this embodiment, the Thm value is 400°C, and the Vmax value is 600°C; =300V, =590℃ as an example: Obtain the time it takes for the electric heating element to heat the target object at a voltage of Vmax = 400V. During this process, the temperature of the electric heating element rises by 590°C. , and then obtain the time it takes to heat the target object to the operating temperature at a voltage of 300V , then the total time corresponding to the combined heating process is ; During the heating process, the input voltage and current of the electric heating element are monitored in real time to calculate the power; Under the monitoring voltage of 400V, the input current of the electric heating element is 20A, the heating time is 25min, and the power consumption is 400*20*25 / 60=3.33Kwh; Monitor the voltage at 300V, the input current of the electric heating element is 15A, then the heating time is 10min, and the power consumption is 300*15*10 / 60=0.75Kwh; The total power consumption corresponding to the combined heating process is 4.08Kwh.

[0020] like Figure 3 As shown, if the initial temperature of the electric heating element rises to a predetermined element temperature threshold, the operating voltage of the electric heating element is reduced. Specifically: Obtaining a first heating time for the electric heating element to heat the target object at the maximum operating voltage of the element under the current working condition, so that the initial temperature of the electric heating element is increased to a predetermined element temperature threshold; Obtaining a second heating time during which the electric heating element heats the target object at a maximum operating voltage of the element at room temperature, so that the initial temperature of the electric heating element rises to a predetermined element temperature threshold; Based on the first heating time, the second heating time, the predetermined element temperature threshold, and the upper limit of the element operating voltage corresponding to the predetermined element temperature threshold, the operating voltage of the electric heating element is reduced, specifically: Calculating a voltage correction factor according to the first heating time, the second heating time, and a predetermined component temperature threshold includes calculating the voltage correction factor using the following formula: ; Indicates the voltage correction factor; represents the target correction coefficient, ; represents a predetermined component temperature threshold, Indicates the initial temperature of the electric heating element under the current working conditions, Indicates the first heating time; represents the correction base coefficient, ; Indicates the initial temperature of the electric heating element at room temperature, Indicates the second heating time; The voltage correction coefficient and the upper limit of the component operating voltage corresponding to the predetermined component temperature threshold are used to calculate the correction voltage value, including calculating the correction voltage using the following formula: ; Indicates the correction voltage; Indicates the voltage correction factor, Indicates the upper limit of the component operating voltage corresponding to the predetermined component temperature threshold; Reduce the maximum operating voltage of the component to the corrected voltage value; The corrected voltage value is used to make the electric heating element continue to heat the target object until the temperature of the target object is increased to the operating temperature.

[0021] Example 2 like Figure 4 As shown, a paver electric heating control system includes: An acquisition module is used to obtain parameters of the electric heating element of the paver, an initial temperature of the electric heating element, an initial temperature of a target heated object, and an operating temperature of the target heated object; The processing module is used to determine the optimal heating strategy that enables the electric heating element to heat the target heating object from the initial temperature to the operating temperature in the shortest time and with the least energy consumption based on the parameters of the electric heating element of the paver, the initial temperature of the electric heating element, the initial temperature of the target heating object and the operating temperature of the target heating object.

[0022] The regulating module is used to control the electric heating element to heat the target heating object according to the optimal heating strategy.

[0023] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage CD-ROMs, optical storage, etc.) containing computer-usable program code.

[0024] The present application is described with reference to the flowcharts of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process in the flowchart can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the process in the flowchart. Figure 1 a process or multiple processes or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0025] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A function specified in a process or multiple processes.

[0026] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 The steps of a specified function in a process or multiple processes.

[0027] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, which are all protected by the present invention.

Claims

1. A method for controlling electric heating of a paver, characterized in that: include: Obtaining parameters of the electric heating element of the paver, the initial temperature of the electric heating element, the initial temperature of the target heated object, and the operating temperature of the target heated object; Determine an optimal heating strategy based on parameters of the electric heating element of the paving machine, the initial temperature of the electric heating element, the initial temperature of the target heated object, and the operating temperature of the target heated object, so that the electric heating element heats the target heated object from the initial temperature to the operating temperature in the shortest time and with the lowest energy consumption; The electric heating element is controlled to heat the target object according to the optimal heating strategy.

2. The electric heating control method for a paver according to claim 1, characterized in that: The electric heating element parameters include the maximum allowable heating temperature of the element and the maximum operating voltage of the element.

3. The electric heating control method for a paver according to claim 2, characterized in that: The method of determining an optimal heating strategy based on parameters of the electric heating element of the paving machine, an initial temperature of the electric heating element, an initial temperature of the target heated object, and an operating temperature of the target heated object, so as to minimize the time taken by the electric heating element to heat the target heated object from the initial temperature to the operating temperature and minimize energy consumption, comprises: Use the maximum operating voltage of the element to heat the target object; If the initial temperature of the electric heating element rises to a predetermined element temperature threshold, the operating voltage of the electric heating element is reduced; The target object is continued to be heated using the reduced operating voltage of the electric heating element until the temperature of the target object is increased to the operating temperature.

4. The electric heating control method for a paver according to claim 3, characterized in that: The method for determining the predetermined component temperature threshold comprises: Based on the maximum allowable heating temperature and the maximum operating voltage of the component, the maximum allowable heating temperature and the maximum operating voltage of the component are reduced according to a certain gradient to form a heating upper limit value group including multiple component heating upper limit values ​​and an operating voltage upper limit value group including multiple component operating voltage upper limit values; Based on the heating upper limit value group and the working voltage upper limit value group, calculate the total time and total energy consumption of heating the target heating object from the initial temperature to the working temperature at room temperature; The upper limit of component heating corresponding to the minimum heating time and total energy consumption is selected as the component temperature threshold.

5. The electric heating control method for a paver according to claim 4, characterized in that: The calculation of the total time and total energy consumption for heating the target heating object from the initial temperature to the operating temperature at room temperature based on the heating upper limit value group and the operating voltage upper limit value group includes: Cross-combining the heating upper limit value group and the working voltage upper limit value group; The electric heating element heats the target object at room temperature at the maximum operating voltage of the element. When the temperature of the electric heating element reaches the upper limit of the element heating corresponding to each combination, the operating voltage of the electric heating element is reduced. Lowering the operating voltage of the low-power heating element to the upper limit of the element operating voltage corresponding to each combination, and continuing to heat the target object until the target object is heated to the operating temperature; Calculate the total time and total energy consumption corresponding to each combined heating process.

6. The electric heating control method for a paver according to claim 4, characterized in that: If the initial temperature of the electric heating element rises to a predetermined element temperature threshold, reducing the operating voltage of the electric heating element comprises: Obtaining a first heating time for the electric heating element to heat the target object at the maximum operating voltage of the element under the current working condition, so that the initial temperature of the electric heating element is increased to a predetermined element temperature threshold; Obtaining a second heating time during which the electric heating element heats the target object at a maximum operating voltage of the element at room temperature, so that the initial temperature of the electric heating element rises to a predetermined element temperature threshold; The operating voltage of the electric heating element is reduced based on the first heating time, the second heating time, the predetermined element temperature threshold, and the upper limit of the element operating voltage corresponding to the predetermined element temperature threshold.

7. The electric heating control method for a paver according to claim 6, characterized in that: The step of reducing the operating voltage of the electric heating element based on the first heating time, the second heating time, the predetermined element temperature threshold, and the upper limit of the element operating voltage corresponding to the predetermined element temperature threshold comprises: Calculating a voltage correction coefficient based on the first heating time, the second heating time, and a predetermined component temperature threshold; Calculate a corrected voltage value using a voltage correction coefficient and a component operating voltage upper limit corresponding to a predetermined component temperature threshold; Reduce the maximum operating voltage of the component to the corrected voltage value.

8. The electric heating control method for a paver according to claim 7, characterized in that: The calculating of the voltage correction coefficient according to the first heating time, the second heating time and a predetermined component temperature threshold comprises: The voltage correction factor is calculated using the following formula: ； Indicates the voltage correction factor; represents the target correction factor; represents the correction base coefficient; ； represents a predetermined component temperature threshold, Indicates the initial temperature of the electric heating element under the current working conditions, Indicates the first heating time; ； Indicates the initial temperature of the electric heating element at room temperature, Indicates the second heating time.

9. The electric heating control method for a paver according to claim 7, characterized in that: The method of calculating the corrected voltage value by using the voltage correction coefficient and the upper limit of the component operating voltage corresponding to the predetermined component temperature threshold comprises: The correction voltage is calculated using the following formula: ； Indicates the correction voltage; Indicates the voltage correction factor, Indicates the upper limit of the component operating voltage corresponding to a predetermined component temperature threshold.

10. A paver electric heating control system, characterized in that: include: An acquisition module is used to obtain parameters of the electric heating element of the paver, an initial temperature of the electric heating element, an initial temperature of a target heated object, and an operating temperature of the target heated object; a processing module for determining an optimal heating strategy for enabling the electric heating element to heat the target object from the initial temperature to the operating temperature in the shortest time and with the lowest energy consumption based on parameters of the electric heating element of the paving machine, an initial temperature of the electric heating element, an initial temperature of the target object to be heated, and an operating temperature of the target object to be heated; The regulating module is used to control the electric heating element to heat the target heating object according to the optimal heating strategy.

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