A method and system for electrically heating a paving machine

Abstract

The application discloses a paving machine electric heating control method and system, and belongs to the technical field of engineering machinery. The paving machine electric heating control method is based on paving machine electric heating element parameters, an electric heating element initial temperature, a target heating object initial temperature and a target heating object working temperature, determines an optimal heating strategy for the electric heating element to heat the target heating object from the initial temperature to the working temperature in the shortest time and with the minimum energy consumption, and controls the electric heating element to heat the target heating object according to the optimal heating strategy. The heating power consumption and heating time of the electric heating element are considered, the situation that the electric heating element always works at the maximum power is avoided, the equipment life is prolonged, and the problems that the current paving machine cannot effectively regulate the heating process, the electric heating element works at the highest limit value temperature for a long time, the equipment power consumption is excessively high, and the equipment life is shortened are solved.

Description

Technical Field

[0001] This invention relates to a method and system for controlling the electric heating of a paver, belonging to the field of engineering machinery technology. Background Technology

[0002] To ensure construction quality, the screed needs to be heated before or during asphalt paving. The heating principle of the screed is that, as the heated component, it needs to be heated by an electric heating element. This heat is then transferred to the screed. Therefore, there is a temperature difference between the heated component and the heating element. In actual operation, when the electric heating element is continuously energized, its temperature will continue to rise. It's possible that when the electric heating element reaches its maximum temperature limit, the screed has not yet reached the target temperature. In this case, the electric heating element is very prone to damage. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a method and system for controlling electric heating of a paver. It 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 equipment life, and solves the problem that the current paver cannot effectively regulate 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 equipment life.

[0004] To solve the above-mentioned technical problems, the present invention is implemented using the following technical solution:

[0005] This invention provides a method for controlling the electric heating of a paver, comprising:

[0006] Obtain the parameters of the paver's electric heating element, the initial temperature of the electric heating element, the initial temperature of the target object to be heated, and the working temperature of the target object to be heated;

[0007] Based on the parameters of the paver's electric heating element, the initial temperature of the electric heating element, the initial temperature of the target object to be heated, and the working temperature of the target object to be heated, the 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 working temperature is determined.

[0008] The electric heating element is controlled to heat the target object according to the optimal heating strategy.

[0009] Furthermore, the parameters of the electric heating element include the maximum allowable heating temperature and the maximum operating voltage of the element.

[0010] Furthermore, the determination of the optimal heating strategy based on the paver's electric heating element parameters, 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, to minimize the time and energy consumption required for the electric heating element to heat the target heated object from its initial temperature to its operating temperature, includes:

[0011] The target object is heated by using the maximum operating voltage of the component.

[0012] If the initial temperature of the electric heating element rises to a predetermined element temperature threshold, the operating voltage of the electric heating element will be reduced.

[0013] The target object is heated by using a reduced operating voltage of the electric heating element until its temperature reaches the operating temperature.

[0014] Furthermore, the method for determining the predetermined component temperature threshold includes:

[0015] Based on the maximum allowable heating temperature and maximum operating voltage of the component, the maximum allowable heating temperature and 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 a working voltage upper limit value group including multiple component operating voltage upper limit values;

[0016] Based on the heating upper limit value group and the working voltage upper limit value group, calculate the total time and total energy consumption for heating the target object from the initial temperature to the working temperature at room temperature;

[0017] The element heating upper limit value corresponding to the minimum heating time and total energy consumption is selected as the element temperature threshold.

[0018] Furthermore, the calculation of the total time and total energy consumption for heating the target object from its initial temperature to its operating temperature at room temperature, based on the upper limit set of heating values ​​and the upper limit set of operating voltage values, includes:

[0019] Combine the heating upper limit value group with the working voltage upper limit value group in a cross manner;

[0020] The electric heating element is heated to the target object at room temperature with its maximum operating voltage. Once the electric heating element reaches the upper limit of heating value corresponding to each combination, the operating voltage of the electric heating element is reduced.

[0021] Reduce the operating voltage of the low-electric heating element to the upper limit of the operating voltage of the element corresponding to each combination, and continue to heat the target object until the target object is heated to the operating temperature;

[0022] Calculate the total time and total energy consumption for each combined heating process.

[0023] Furthermore, the step of reducing the operating voltage of the electric heating element if the initial temperature rises to a predetermined element temperature threshold includes:

[0024] The first heating time is obtained when the electric heating element heats the target object at its maximum operating voltage under the current operating conditions, so that the initial temperature of the electric heating element rises to a predetermined element temperature threshold.

[0025] The second heating time is obtained when the electric heating element heats the target object at room temperature with the maximum operating voltage of the element, so that the initial temperature of the electric heating element rises to a predetermined element temperature threshold.

[0026] 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.

[0027] Furthermore, the reduction of the operating voltage of the electric heating element based on the first heating time, the second heating time, a predetermined element temperature threshold, and the upper limit of the element operating voltage corresponding to the predetermined element temperature threshold includes:

[0028] Calculate the voltage correction factor based on the first heating time, the second heating time, and a predetermined component temperature threshold.

[0029] The corrected voltage value is calculated using a voltage correction factor and the upper limit of the component operating voltage corresponding to a predetermined component temperature threshold.

[0030] Reduce the maximum operating voltage of the component to the corrected voltage value.

[0031] Furthermore, the step of calculating the voltage correction coefficient based on the first heating time, the second heating time, and a predetermined component temperature threshold includes:

[0032] The voltage correction factor is calculated using the following formula:

[0033] ;

[0034] Indicates the voltage correction factor;

[0035] Indicates the target correction factor;

[0036] Indicates the correction reference coefficient;

[0037] ;

[0038] This indicates a predetermined component temperature threshold. This indicates the initial temperature of the electric heating element under the current operating conditions. Indicates the first heating time;

[0039] ;

[0040] This indicates the initial temperature of the electric heating element at room temperature. This indicates the second heating time.

[0041] Furthermore, the calculation of the corrected voltage value using a voltage correction coefficient and a predetermined upper limit of the component operating voltage corresponding to a component temperature threshold includes:

[0042] The corrected voltage is calculated using the following formula:

[0043] ;

[0044] Indicates the corrected voltage;

[0045] This represents the voltage correction factor. This indicates the upper limit of the component's operating voltage corresponding to a predetermined component temperature threshold.

[0046] The present invention also provides an electric heating control system for a paver, comprising:

[0047] The acquisition module is used to acquire the parameters of the paver's electric heating element, the initial temperature of the electric heating element, the initial temperature of the target heating object, and the working temperature of the target heating object;

[0048] The processing module is used to determine the optimal heating strategy that minimizes the time and energy consumption for the electric heating element to heat the target object from the initial temperature to the working temperature, based on the parameters of the paver's electric heating element, the initial temperature of the electric heating element, the initial temperature of the target object to be heated, and the working temperature of the target object to be heated.

[0049] The adjustment module is used to control the electric heating element to heat the target object according to the optimal heating strategy.

[0050] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0051] This invention, based on the parameters of the paver's electric heating element, the initial temperature of the electric heating element, the initial temperature of the target material to be heated, and the working temperature of the target material to be heated, determines the optimal heating strategy that minimizes the time and energy consumption required for the electric heating element to heat the target material from its initial temperature to its working temperature. The invention then controls the electric heating element to heat the target material according to this optimal heating strategy, taking into account the heating power consumption and heating time of the electric heating element. This avoids the situation where the electric heating element always operates at maximum power, thus improving equipment lifespan. It solves the problem that current pavers cannot effectively regulate the heating process, causing the electric heating element to operate at its maximum limit temperature for extended periods, resulting in excessive power consumption and shortened equipment lifespan. Attached Figure Description

[0052] Figure 1 This is a flowchart of a paver electric heating control method provided in an embodiment of the present invention;

[0053] Figure 2 This is a flowchart of the optimal heating strategy in a paver electric heating control method provided in an embodiment of the present invention;

[0054] Figure 3 This is a flowchart illustrating the process of reducing the operating voltage of the electric heating element in a paver electric heating control method provided in an embodiment of the present invention;

[0055] Figure 4 This is a schematic diagram of the structure of an electric heating control system for a paver provided in an embodiment of the present invention. Detailed Implementation

[0056] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0057] Example 1

[0058] like Figure 1 As shown, a method for controlling the electric heating of a paver includes:

[0059] Obtain the parameters of the paver's electric heating element, the initial temperature of the electric heating element, the initial temperature of the target object to be heated, and the working temperature of the target object to be heated;

[0060] In this embodiment, the parameters of the electric heating element include the maximum allowable heating temperature and the maximum operating voltage of the element;

[0061] Based on the parameters of the paver's electric heating element, the initial temperature of the electric heating element, the initial temperature of the target object to be heated, and the working temperature of the target object to be heated, the 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 working temperature is determined.

[0062] like Figure 2As 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:

[0063] The target object is heated by using the maximum operating voltage of the component.

[0064] Among them, the maximum operating voltage of the component is the maximum operating voltage of the equipment without affecting its lifespan. Maintaining this voltage can make the electric heating element heat up quickly. If this voltage is used throughout the entire operation, it will affect the lifespan of the equipment and consume a lot of energy in the long run.

[0065] If the initial temperature of the electric heating element rises to a predetermined element temperature threshold, the operating voltage of the electric heating element will be reduced.

[0066] Methods for determining predetermined component temperature thresholds include:

[0067] Based on the maximum allowable heating temperature and maximum operating voltage of the component, the maximum allowable heating temperature and 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 a working voltage upper limit value group including multiple component operating voltage upper limit values;

[0068] In this embodiment, the maximum allowable heating temperature of the component is Thm, and the maximum operating voltage of the component is Vmax. A temperature reduction gradient of 5°C and a voltage reduction gradient of 50V are used to form a heating upper limit value group and an operating voltage upper limit value group.

[0069] Based on the upper limit set of heating values ​​and the upper limit set of operating voltage values, calculate the total time and total energy consumption for heating the target object from its initial temperature to its operating temperature at room temperature, including:

[0070] As shown in Table 1, the heating upper limit value group and the working voltage upper limit value group are cross-combined;

[0071] The electric heating element is heated to the target object at room temperature with its maximum operating voltage. Once the electric heating element reaches the upper limit of heating value corresponding to each combination, the operating voltage of the electric heating element is reduced.

[0072] Reduce the operating voltage of the low-electric heating element to the upper limit of the operating voltage of the element corresponding to each combination, and continue to heat the target object until the target object is heated to the operating temperature;

[0073] Calculate the total time and total energy consumption for each combined heating process;

[0074] The element heating upper limit value corresponding to the minimum heating time and total energy consumption is selected as the element temperature threshold;

[0075] Table 1 Cross Combinations

[0076] In Table 1, Thrm-5℃, Thrm-10℃, and Thrm-15℃ form the upper limit value group for the working voltage. Indicates the first value in the upper limit of heating group n The upper limit value for heating of each component; Vmax-50V, Vmax-100V, and Vmax-150V constitute the upper limit value group for operating voltage. Indicates the first value in the upper limit of the working voltage group n Upper limit of operating voltage for each component;

[0077] In this embodiment, Thm is set to 400℃ and Vmax is set to 600℃; =300V, For example, at 590℃:

[0078] Obtain the time it takes for the electric heating element to heat the target object at a voltage of Vmax = 400V, resulting in a temperature rise of 590℃. Then, obtain the time it takes to heat the target heating object to the working temperature using a 300V voltage. The total time corresponding to this combined heating process is ;

[0079] The input voltage and current of the electric heating element are monitored in real time during the heating process to calculate the power.

[0080] Under a 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;

[0081] If the input current of the electric heating element is 15A under a voltage of 300V, then the power consumption for a heating time of 10 minutes is 300*15*10 / 60=0.75kWh.

[0082] The total power consumption for this combined heating process is 4.08 kWh.

[0083] 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:

[0084] The first heating time is obtained when the electric heating element heats the target object at its maximum operating voltage under the current operating conditions, so that the initial temperature of the electric heating element rises to a predetermined element temperature threshold.

[0085] The second heating time is obtained when the electric heating element heats the target object at room temperature with the maximum operating voltage of the element, so that the initial temperature of the electric heating element rises to a predetermined element temperature threshold.

[0086] Based on the first heating time, the second heating time, a 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:

[0087] Based on the first heating time, the second heating time, and a predetermined component temperature threshold, calculate the voltage correction factor, including using the following formula:

[0088] ;

[0089] Indicates the voltage correction factor;

[0090] This represents the target correction factor. ;

[0091] This indicates a predetermined component temperature threshold. This indicates the initial temperature of the electric heating element under the current operating conditions. Indicates the first heating time;

[0092] This indicates the adjustment of the baseline coefficient. ;

[0093] This indicates the initial temperature of the electric heating element at room temperature. Indicates the second heating time;

[0094] The corrected voltage value is calculated using a voltage correction factor and a predetermined upper limit of the component operating voltage corresponding to the component temperature threshold. This includes calculating the corrected voltage using the following formula:

[0095] ;

[0096] Indicates the corrected voltage;

[0097] This represents the voltage correction factor. This indicates the upper limit of the component's operating voltage corresponding to a predetermined component temperature threshold;

[0098] Reduce the maximum operating voltage of the component to the corrected voltage value;

[0099] The corrected voltage value is used to enable the electric heating element to continue heating the target object until the temperature of the target object rises to the operating temperature.

[0100] Example 2

[0101] like Figure 4 As shown, an electric heating control system for a paver includes:

[0102] The acquisition module is used to acquire the parameters of the paver's electric heating element, the initial temperature of the electric heating element, the initial temperature of the target heating object, and the working temperature of the target heating object;

[0103] The processing module is used to determine the optimal heating strategy that minimizes the time and energy consumption for the electric heating element to heat the target object from its initial temperature to its working temperature, based on the parameters of the paver's electric heating element, the initial temperature of the electric heating element, the initial temperature of the target object to be heated, and the working temperature of the target object to be heated.

[0104] The adjustment module is used to control the electric heating element to heat the target object according to the optimal heating strategy.

[0105] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can 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.

[0106] This application is described with reference to flowchart illustrations of methods, apparatus (systems), and computer program products according to embodiments of this application. It should be understood that each step 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, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the processes. Figure 1 One or more processes or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0107] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 The function specified in one or more processes.

[0108] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 Steps of a specified function in one or more processes.

[0109] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A method for controlling the electric heating of a paver, characterized in that, include: Obtain the parameters of the paver's electric heating element, the initial temperature of the electric heating element, the initial temperature of the target object to be heated, and the working temperature of the target object to be heated; The parameters of the electric heating element include the maximum allowable heating temperature and the maximum operating voltage of the element; Based on the parameters of the paver's electric heating element, the initial temperature of the electric heating element, the initial temperature of the target material to be heated, and the operating temperature of the target material to be heated, the optimal heating strategy that minimizes the time and energy consumption required for the electric heating element to heat the target material from its initial temperature to its operating temperature is determined, including: The target object is heated by using the maximum operating voltage of the component. 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, including: The first heating time is obtained when the electric heating element heats the target object at its maximum operating voltage under the current operating conditions, so that the initial temperature of the electric heating element rises to a predetermined element temperature threshold. The second heating time is obtained when the electric heating element heats the target object at room temperature with the maximum operating voltage of the element, 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. The target object is heated by using a reduced operating voltage of the electric heating element until the temperature of the target object rises to the operating temperature. The electric heating element is controlled to heat the target object according to the optimal heating strategy.

2. The paver electric heating control method according to claim 1, characterized in that, The method for determining the predetermined component temperature threshold includes: Based on the maximum allowable heating temperature and maximum operating voltage of the component, the maximum allowable heating temperature and 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 a working 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 for heating the target object from the initial temperature to the working temperature at room temperature; The element heating upper limit value corresponding to the minimum heating time and total energy consumption is selected as the element temperature threshold.

3. The paver electric heating control method according to claim 2, characterized in that, The calculation of the total time and total energy consumption for heating the target object from its initial temperature to its operating temperature at room temperature, based on the upper limit set of heating and the upper limit set of operating voltage, includes: Combine the heating upper limit value group with the working voltage upper limit value group in a cross manner; The electric heating element is heated to the target object at room temperature with its maximum operating voltage. Once the electric heating element reaches the upper limit of heating value corresponding to each combination, the operating voltage of the electric heating element is reduced. Reduce the operating voltage of the low-electric heating element to the upper limit of the operating voltage of the element corresponding to each combination, and continue to heat the target object until the target object is heated to the operating temperature; Calculate the total time and total energy consumption for each combined heating process.

4. The paver electric heating control method according to claim 1, characterized in that, The method of reducing the operating voltage of the electric heating element based on the first heating time, the second heating time, a predetermined element temperature threshold, and the upper limit of the element operating voltage corresponding to the predetermined element temperature threshold includes: Calculate the voltage correction factor based on the first heating time, the second heating time, and a predetermined component temperature threshold. The corrected voltage value is calculated using a voltage correction factor and the upper limit of the component's operating voltage corresponding to a predetermined component temperature threshold. Reduce the maximum operating voltage of the component to the corrected voltage value.

5. The paver electric heating control method according to claim 4, characterized in that, The step of calculating the voltage correction coefficient based on 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; Indicates the target correction factor; Indicates the correction reference coefficient; ； This indicates a predetermined component temperature threshold. This indicates the initial temperature of the electric heating element under the current operating conditions. Indicates the first heating time; ； This indicates the initial temperature of the electric heating element at room temperature. This indicates the second heating time.

6. The paver electric heating control method according to claim 4, characterized in that, The calculation of the corrected voltage value using a voltage correction coefficient and a pre-determined upper limit of the component operating voltage corresponding to a component temperature threshold includes: The corrected voltage is calculated using the following formula: ； Indicates the corrected voltage; This represents the voltage correction factor. This indicates the upper limit of the component's operating voltage corresponding to a predetermined component temperature threshold.

7. A paver electric heating control system, characterized in that, include: The acquisition module is used to acquire the parameters of the paver's electric heating element, the initial temperature of the electric heating element, the initial temperature of the target heating object, and the working temperature of the target heating object; The processing module is used to determine the optimal heating strategy that minimizes the time and energy consumption for the electric heating element to heat the target object from the initial temperature to the working temperature, based on the parameters of the paver's electric heating element, the initial temperature of the electric heating element, the initial temperature of the target object to be heated, and the working temperature of the target object to be heated. The adjustment module is used to control the electric heating element to heat the target object according to the optimal heating strategy.

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