Method for distributing material of a paving machine, distribution system of a paving machine and paving machine

Abstract

The application relates to the technical field of working machines, and provides a material distribution control method of a paver, a material distribution system of the paver and the paver. The material distribution control method of the paver comprises the following steps: acquiring a maximum spiral rotating speed, a minimum spiral rotating speed, a material level adjustable height difference, an initial spiral rotating speed and a set material level height of the paver; determining a reference slope k of a binary first-order relation formula of the material level height and a target spiral rotating speed according to a difference between the minimum spiral rotating speed and the maximum spiral rotating speed and the material level adjustable height difference; determining a reference parameter a of the binary first-order relation formula according to the reference slope, the initial spiral rotating speed and the set material level height; and controlling actual material output of the paver to meet preset material output by adjusting the reference slope k and / or the reference parameter a of the binary first-order relation formula. The material distribution control method of the paver provided by the application calculates a relation formula of the material level height and the target spiral rotating speed, and can realize automatic adjustment according to the relation formula, and the adjustment timeliness and stability are better.

Description

Technical Field

[0001] This invention relates to the field of construction machinery technology, and in particular to a material distribution control method for a paver, a material distribution system for a paver, and a paver. Background Technology

[0002] A paver is mainly composed of a power system, a travel system, a hopper device, a material conveying system, a material distribution system, a frame, a screed device, a leveling system, a heating system, a canopy, a boom, a hydraulic system, an electrical system, and a control system.

[0003] The paver's material distribution system uses level sensors to measure the material level on the edge of the auger distributor in real time. The sensors collect distance signals and linearly correlate these signals with the pump displacement to adjust the auger speed as needed. The accuracy of the paver's material level control, which directly affects the auger distributor's operating status, directly impacts the stability of the screed. Unstable material levels cause the screed to fluctuate, affecting road surface smoothness.

[0004] When paving conditions change, adjustments are required. This is usually done manually by the operator through observation of the conditions. However, the accuracy of these adjustments is greatly affected by factors such as personnel, experience, and environment, and there are instances where the operator cannot respond or keep up with the changes quickly. Summary of the Invention

[0005] This invention provides a material distribution control method for a paver to solve or improve the defects of manual adjustment in the prior art. By calculating the relationship between material level height and auger speed, automatic adjustment can be achieved according to the relationship, resulting in better timeliness and stability of adjustment.

[0006] This invention provides a material distribution control method for a paver, comprising:

[0007] Get the paver's maximum auger speed, minimum auger speed, adjustable material level difference, initial auger speed, set material level height, actual material level height, and current auger speed;

[0008] Based on the difference between the minimum and maximum screw speeds and the difference in adjustable material level height, the reference slope k of the linear equation relating material level height and screw speed is determined, wherein the reference slope k is a negative number.

[0009] The reference parameter a of the binary linear relationship is determined based on the reference slope, the initial screw speed, and the set material level height.

[0010] By adjusting the reference slope k and / or reference parameter a of the linear binary relation, the actual output of the paver is controlled to meet the preset output. The linear binary relation is expressed as: y = kx + a, where y represents the target auger speed and x represents the material level height.

[0011] According to the material distribution control method of a paver provided by the present invention, the step of controlling the actual output of the paver to meet the preset output by adjusting the reference slope k and / or reference parameter a of the binary linear equation includes:

[0012] If the actual output of the paver is determined to be less than the preset output, the reference slope k of the linear equation is controlled to decrease to a first slope k1. Based on the linear equation of the first slope k1 and the actual material level, the current auger speed is controlled to increase relative to the initial auger speed until the actual output reaches the preset output. The set material level and the initial auger speed form a set coordinate point, and the set coordinate point lies on the straight line corresponding to the linear equation of the first slope k1.

[0013] or,

[0014] If the actual output of the paver is determined to be greater than the preset output, the reference slope k of the linear equation is increased to a second slope k2. Based on the linear equation of the second slope k2 and the actual material level, the current auger speed is controlled to decrease relative to the initial auger speed until the actual output reaches the preset output. The set material level and the initial auger speed form a set coordinate point, which lies on the straight line corresponding to the linear equation of the second slope k2, where the second slope k2 is negative.

[0015] According to a paver material distribution control method provided by the present invention, the step of determining that the actual output of the paver is less than the preset output includes:

[0016] Determine that the actual material level height is less than the set material level height; and / or, determine that the actual material level width is less than the preset material level width;

[0017] The step of determining that the actual output of the paver is greater than the preset output includes:

[0018] Determine that the actual material level height is greater than the set material level height; and / or, determine that the actual material level width is greater than the preset material level width.

[0019] According to the material distribution control method for a paver provided by the present invention, the step of determining that the actual material width is less than the preset material width includes:

[0020] If the ironing board is extended, it is determined that the actual material width is less than the preset material width.

[0021] The step of determining that the actual material level width is greater than the preset material level width includes:

[0022] If the retraction command of the ironing board is received, it is determined that the actual material width is less than the preset material width.

[0023] According to a paver material distribution control method provided by the present invention, the step of controlling the current auger speed to decrease relative to the initial auger speed includes:

[0024] Reduce the current value of the screw drive pump to control the speed of the screw drive motor to decrease;

[0025] The step of increasing the real-time helical speed relative to the initial helical speed includes:

[0026] Increase the current value of the screw drive pump to control the increase of the speed of the screw drive motor.

[0027] The material distribution control method for a paver provided by the present invention further includes:

[0028] Once the change in the set material level height is obtained, the reference parameter 'a' of the binary linear relationship is re-determined based on the reference slope, the initial screw speed, and the changed set material level height.

[0029] According to a paver material distribution control method provided by the present invention, the step of determining the change in the set material level height includes:

[0030] If a spiral lifting command is received, the set material level height will be increased.

[0031] or,

[0032] If a spiral descent command is received, the set material level height will be reduced.

[0033] According to the material distribution control method for a paver provided by the present invention, the step of obtaining the initial auger speed of the paver includes:

[0034] The initial auger speed is determined based on the paver's travel speed, paving width, paving thickness, and auger height.

[0035] The present invention also provides a material distribution system for a paver for performing the material distribution control method of the paver as described in any of the above claims, comprising: a auger distributor, an auger drive device, and a controller, wherein the auger distributor is connected to the output end of the auger drive device, and the auger drive device is communicatively connected to the controller.

[0036] The present invention also provides a paver, including the material distribution system of the paver as described above.

[0037] The present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the material distribution control method of any of the above-described pavers.

[0038] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the material distribution control method of the paver as described above.

[0039] The paver material distribution control method provided by this invention calculates the reference slope of the linear relationship between material height and auger speed, and then calculates the reference parameters of the linear relationship based on the set material height and initial auger speed. When the actual output deviates from the preset output, the actual output can meet the preset output requirement by adjusting the reference slope and reference parameters of the linear relationship.

[0040] When the ironing plate extends or retracts, if the ironing plate extends, the reference slope is reduced, so that the current screw speed increases relative to the initial screw speed until the actual output meets the preset output. If the ironing plate retracts, the reference slope is increased, so that the current screw speed decreases relative to the initial screw speed until the actual output meets the preset output.

[0041] As the screw rises and falls, the actual material level will change. Adjust the reference slope of the linear equation and adjust the target screw speed according to the linear equation and the actual material level to make the actual material level meet the set material level. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0043] Figure 1 This is a top view structural diagram of the paver provided by the present invention;

[0044] Figure 2 This is a rear view structural schematic diagram of the paver provided by the present invention;

[0045] Figure 3 This is one of the flowcharts illustrating the material distribution control method for a paver provided by the present invention;

[0046] Figure 4 This is a schematic diagram of the binary linear equation of the material distribution control method for the paver provided by the present invention;

[0047] Figure 5 This is a schematic diagram of the linear equation of the material distribution control method for the paver provided by the present invention, with coordinate points A and B marked in the diagram;

[0048] Figure 6 This is the second flowchart of the material distribution control method for the paver provided by the present invention;

[0049] Figure 7 This is a schematic diagram of the structure of the electronic device provided by the present invention;

[0050] Figure label:

[0051] 1. Spiral distributor; 2. Ironing plate; 3. Material level sensor; 4. Lifting mechanism; 5. Telescopic mechanism. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0053] An embodiment of the first aspect of the present invention provides a material distribution control method for a paver. Before describing the material distribution control method for paving, the structure of the paver will be briefly introduced.

[0054] refer to Figure 1 and Figure 2 As shown, Figure 1 The top view of the paver shows the positions of the auger distributor 1 and the screed 2. Figure 2 The location of the material level sensor 3 is shown in the rear view of the paver, with the direction of travel being forward. The material level sensor 3 is located at the end of the auger distributor 1 and is used to detect the height of the material laid by the auger distributor 1.

[0055] refer to Figure 1 As shown, the auger distributor 1 of the paver is connected to a lifting mechanism 4 to control the raising and lowering of the auger distributor 1; the screed 2 of the paver is connected to a telescopic mechanism 5 to control the extension and retraction of the screed 2; after the auger distributor 1 conveys the material, it is leveled to a suitable width and thickness by the screed 2.

[0056] refer to Figure 3As shown, the paver material distribution control method of this embodiment includes:

[0057] Step 10: Obtain the paver's maximum auger speed, minimum auger speed, adjustable material height difference, initial auger speed, set material height, actual material height, and current auger speed;

[0058] The maximum and minimum screw speeds can be understood as the rotation speed of the screw distributor being controlled by a screw drive device, which includes a screw drive pump and a screw drive motor. The screw drive pump and the screw drive motor work together to regulate the speed of the screw distributor. The performance of the screw drive pump and the screw drive motor determines the maximum and minimum screw speeds.

[0059] The adjustable height difference of the material level can be preset according to the working conditions, and then the performance of the screw conveyor mechanism can be set according to the adjustable height difference. The adjustable height difference of the material level can also be understood as the difference between the maximum and minimum height of the material level. This adjustable height difference is related to the height of the screw distributor. The screw conveyor mechanism is used to control the lifting and lowering of the screw distributor. The performance of the screw conveyor mechanism affects the maximum and minimum height of the screw distributor. The maximum height of the screw distributor is positively correlated with the maximum height of the material level, and the minimum height of the screw distributor is positively correlated with the minimum height of the material level. Therefore, the adjustable height difference of the material level can be controlled by adjusting the performance of the screw conveyor mechanism. In this embodiment of the invention, the screw speed and screw height can both correspond to the screw distributor. The current screw speed is the rotational speed of the screw distributor at the current moment.

[0060] The initial auger speed can be understood as a speed that can be calculated based on the paving conditions. For example, the required material quantity for the paver is determined by considering the paver's paving width, paving thickness, and travel speed. The initial auger speed is then determined based on this required material quantity and the performance of the auger distributor. Of course, the initial auger speed can also be calculated in other ways, such as by adding relevant parameters like auger height, material composition, and properties.

[0061] The material level height is set to a preset value. The set material level height can be understood as being related to the paving thickness of the paver, and the set material level height can be determined according to the paving thickness.

[0062] The actual material level height is the current actual material level height, which is detected and calculated by the material level sensor 3. The material level sensor 3 detects the difference between its height and the detected material level, and this difference is the actual material level height.

[0063] Step 20: Determine the baseline slope k of the linear equation relating the material level height to the target screw speed based on the difference between the minimum and maximum screw speeds and the adjustable height difference of the material level.

[0064] refer to Figure 4 As shown, under the premise that the material level height and the target screw speed form a linear relationship, the minimum material level height hmin and the maximum screw speed vmax, and the maximum material level height hmax and the minimum screw speed vmin, corresponding to the two points (x1, y1) and (x2, y2) in the linear relationship, can be used to calculate the reference slope k through the maximum screw speed, the minimum screw speed, and the difference in adjustable material level height.

[0065] k = (Minimum screw speed - Maximum screw speed) / Adjustable height difference of material level.

[0066] refer to Figure 4 As shown, the linear equation in two variables is expressed as y = kx + a, where y represents the target screw speed and x represents the material level height, so that the target screw speed y is adjusted according to the material level height x. At this time, the reference slope k is a fixed value, and the reference parameter a is unknown. In this case, the linear equation in two variables is a straight line that can be translated along the x-axis in the coordinate system.

[0067] It should be noted that the relationship between the material level and the screw speed mentioned above corresponds to a negative reference slope k.

[0068] Step 30: Determine the reference parameter a of the two-dimensional linear relationship based on the reference slope k, the initial screw speed and the set material level height;

[0069] refer to Figure 4 As shown, after determining the reference slope k, the initial screw speed v0 and the set material height h0 are substituted into the linear equation in two variables to obtain the reference parameter a. The specific linear equation in two variables can then be obtained, and the specific position of the linear equation in two variables in the coordinate system can be determined.

[0070] Step 40: By adjusting the reference slope k and / or reference parameter a of the binary linear equation, the actual output of the paver is controlled to meet the preset output.

[0071] The aforementioned linear relationship in two variables characterizes the baseline relationship between the material level and the target screw speed. When the material level changes, causing the relationship between the material level and the target screw speed to deviate from the aforementioned linear relationship, the baseline slope k or baseline parameter a of the linear relationship can be adjusted in a timely manner to obtain a real-time linear relationship. The target screw speed is then adjusted based on this real-time linear relationship to ensure that both the material level and the target screw speed meet actual requirements, guaranteeing that the actual output meets the preset output requirements. To maintain the material level at the set level, the current screw speed is adjusted to the target screw speed by adjusting the baseline slope k or baseline parameter a of the linear relationship, thus maintaining the current screw speed at the initial screw speed.

[0072] In other words, when there is a deviation between the actual output and the preset output (the actual output is greater than or less than the preset output), the actual output is adjusted by adjusting the target screw speed, based on the above-mentioned binary linear relationship. The actual material level changes accordingly until the actual output meets the requirements of the preset output.

[0073] Both the actual output and the preset output can be threshold values. If there is an overlap between the actual output and the preset output, the actual output can be considered to meet the preset output. Alternatively, if the overlap between the actual output and the preset output reaches a set ratio of the preset output, the actual output can be considered to meet the preset output, and so on. The actual output and the preset output can also be point values. If the actual output and the preset output are the same, the actual output meets the requirements of the preset output.

[0074] The paver material distribution control method of this invention, combined with the performance of the paver and the requirements of the paving conditions, obtains a linear relationship between the material level height and the target auger speed. By adjusting the linear relationship in a timely manner, the material level height and the target auger speed can be automatically adjusted, thereby adjusting the real-time output to meet the preset output requirements. During the operation of the paver, it automatically adjusts with changes in working conditions, that is, it automatically completes the matching of the material distribution slope and parameters, improving the stability of material distribution and the stability of the material level.

[0075] In some embodiments, step 40, which involves controlling the actual output of the paver to meet the preset output by adjusting the reference slope k and / or reference parameter a of the binary linear equation, includes:

[0076] Step 41: Determine that the actual output of the paver is less than the preset output. Control the reference slope k of the linear equation to decrease to the first slope k1. Based on the linear equation of the first slope k1 and the actual material level, control the current screw speed to increase the actual output relative to the initial screw speed to reach the preset output. Here, the material level and the initial screw speed form a set coordinate point. The set coordinate point is on the straight line corresponding to the linear equation of the first slope k1. The reference slope k and the first slope k1 are negative numbers.

[0077] or,

[0078] Step 42: Determine that the actual output of the paver is greater than the preset output. Control the reference slope k of the linear equation to increase to the second slope k2. Based on the linear equation of the second slope k2 and the actual material height, control the current screw speed to decrease relative to the initial screw speed until the actual output reaches the preset output. The initial material height and the initial screw speed form a set coordinate point. The set coordinate point is on the straight line corresponding to the linear equation of the second slope k2. The reference slope k and the second slope k2 are negative numbers.

[0079] The actual output of the paver is affected by the current auger speed. The higher the current auger speed, the greater the actual output, and the higher the actual material level detected by the material level sensor 3. At this time, it is assumed that other parameters of the paver remain unchanged. At the same time, the preset output is affected by the initial auger speed. If the actual material level reaches the set material level, it is considered that the actual output has reached the set output.

[0080] The set material level height and initial screw speed form a set coordinate point (h0, v0). Here, "the set coordinate point lies on the straight line corresponding to the linear relationship in two variables with the first slope k1" can be understood as recalculating the updated parameter a1 based on the first slope k1 and the set coordinate point to obtain a new linear relationship in two variables y = k1x + a1. Alternatively, it can be understood as combining... Figure 5 As shown, with a set coordinate point as the center, the straight line formed by the linear equation y = kx + a rotates upwards around the set coordinate point, making the first slope k1 less than the reference slope k. The trend of the first slope k1 is steeper than the reference slope k, resulting in a new linear equation y = k1x + a1. Similarly, "the set coordinate point is on the straight line corresponding to the linear equation with the second slope k2" can be understood as recalculating the updated parameter a2 based on the second slope k2 and the set coordinate point to obtain a new linear equation y = k2x + a2. Alternatively, it can be understood as combining... Figure 5As shown, with the set coordinate point as the center, the straight line formed by the linear relationship y = kx + a rotates downward around the set coordinate point, so that the second slope k2 is greater than the reference slope k, and the trend of the second slope k2 is gentler than the reference slope k, thus obtaining a new linear relationship y = k2x + a2.

[0081] In step 41, the actual material level height h detected by the material level sensor is used. 实 If the material level is lower than the set material level, it is considered that the actual output of the paver is less than the preset output. (For example, refer to...) Figure 5 As shown, this corresponds to the coordinates of point A(h) in the coordinate system between the actual material level height and the initial screw velocity. 实 If v0 deviates from the linear equation corresponding to the reference slope k and reference parameter a, then the current screw speed needs to be increased to restore the actual material level to the set material level h0. (Refer to...) Figure 5 As shown, the actual material level height h 实 Corresponding to the linear equation in two variables with the first slope k1, the current screw speed is higher than the initial screw speed v0. As the current screw speed increases to the corresponding target screw speed, the actual material level increases accordingly, allowing the actual output to reach the preset output. The corresponding target screw speed is: y = k1x + a1, where the actual material level h is... 实 The x-axis represents the calculated target screw rotation speed. The principle for controlling the reduction of the first slope k1 is based on the actual material level height h. 实 The difference between the slope k1 and the set material level height h0 determines the change in the first slope k1 relative to the reference slope k. For example, as the difference increases, the decrease in the first slope k1 relative to the reference slope k is greater, and as the difference decreases, the decrease in the first slope k1 relative to the reference slope k is smaller. Of course, the first slope k1 can also be adjusted in other ways, such as setting it to a fixed value.

[0082] Step 41, which involves controlling the baseline slope k of the linear equation to decrease to the first slope k1 to control the current screw speed to increase relative to the initial screw speed until the actual output reaches the preset output, includes:

[0083] When the actual output is less than the preset output, as the actual output increases, the first slope k1 increases, and the first slope k1 is less than the reference slope, until the current screw speed is equal to the initial screw speed and the actual output reaches the preset output.

[0084] After the current screw speed increases relative to the initial screw speed, the actual material level increases. As the actual material level increases, the first slope k1 can be increased (the first slope k1 is always less than the reference slope k) to control the current screw speed to decrease (the current screw speed is still greater than the initial screw speed after decreasing) until the actual material level increases to the set material level. At this time, the current screw speed is also adjusted to the initial screw speed, and the actual output meets the preset output requirements. After that, the first slope k1 can return to the reference slope k.

[0085] Currently, the first slope k1 can also be kept as a fixed value until the current screw speed is equal to the initial screw speed and the actual output reaches the preset output.

[0086] In step 41, the actual output is less than the preset output. This can be understood as the actual material level is less than the set material level. The actual material level cannot meet the requirements of the set material level, so the required actual output increases, which means the actual output is less than the preset output.

[0087] In step 41, the actual discharge volume being less than the preset discharge volume can also be understood as the actual material level width being less than the preset material level width. Increasing the material level width increases the required actual discharge volume, meaning the actual discharge volume is less than the preset discharge volume. Similarly, in step 41, if the actual material level width is less than the preset material level width, the actual discharge volume is less than the preset discharge volume. Increasing the current screw speed increases the feeding speed, and the actual discharge volume increases accordingly, until the actual discharge volume meets the preset discharge volume requirement.

[0088] In step 42, if the actual material level height h detected by the material level sensor... ’ 实 If the material level is greater than the set material level, the actual output of the paver is considered to be less than the preset output. (Reference) Figure 5 As shown, this corresponds to the actual material level height h. ’ 实 The coordinates of the initial spiral velocity at point B(h) in the coordinate system ’ 实 If v0 deviates from the linear equation corresponding to the reference slope k and the reference parameter a, then the current screw speed needs to be reduced to adjust the actual material level height h. ’ 实 Lower to the set material level height h0, refer to Figure 5 As shown, the actual material level height h ’ 实Corresponding to the linear equation in two variables with the second slope k2, if the current screw speed is lower than the initial screw speed v0, and the current screw speed decreases to the corresponding target screw speed, then the actual material level height will decrease accordingly, allowing the actual output to be reduced to the preset output. The corresponding target screw speed is: in the linear equation y = k2x + a2, with the actual material level height h... ’ 实 The x-axis represents the calculated target screw rotation speed. The principle for controlling the increase of the second slope k2 can be based on the actual material level height h. ’ 实 The difference between the slope k2 and the set material level height h0 determines the change in the second slope k2 relative to the reference slope k. For example, as the difference increases, the increase in the second slope k2 relative to the reference slope k is greater; conversely, as the difference decreases, the increase in the second slope k2 relative to the reference slope k is smaller. Of course, the second slope k2 can also be adjusted in other ways, such as by setting it to a fixed value.

[0089] In step 42, the step of controlling the reference slope k of the linear equation in the two variables to increase to the second slope k2, so as to control the current screw speed to decrease relative to the initial screw speed until the actual output reaches the preset output, includes:

[0090] When the actual output is greater than the preset output, as the actual output decreases, the second slope k2 decreases and the second slope k2 is greater than the reference slope, until the current screw speed is equal to the initial screw speed and the actual output reaches the preset output.

[0091] After the current screw speed decreases relative to the initial screw speed, the actual material level decreases. As the actual material level decreases, the second slope k2 can be controlled to decrease (ensuring that the second slope k2 is always greater than the reference slope k) to control the current screw speed to increase (the current screw speed is still less than the initial screw speed after the increase) until the actual material level decreases to the set material level. At this time, the current screw speed is also adjusted to the initial screw speed, and the actual output meets the preset output requirements. After that, the second slope k2 can return to the reference slope k.

[0092] Currently, the second slope k2 can also be kept at a fixed value until the current screw speed is equal to the initial screw speed and the actual output reaches the preset output.

[0093] In step 42, the actual output is greater than the preset output, which can be understood as the actual material level height being greater than the set material level height, and / or the actual material level width being greater than the preset material level width.

[0094] The above explanation uses "actual material level height greater than set material level height" as an example. Similarly, in step 42, if the actual material level width is greater than the preset material level width, then the actual output is greater than the preset output. Controlling the current screw speed to decrease will reduce the feeding speed, and the actual output will decrease accordingly until the actual output meets the requirements of the preset output.

[0095] It should be noted that after the actual material level height is greater than (or less than) the preset material level height for a set time, the benchmark slope of the linear equation is adjusted to confirm that the actual output meets the preset output, thus eliminating the impact of single-point material level anomalies on paver operation. Once the actual material level height reaches the set material level height and stabilizes for a set time, the benchmark slope and benchmark parameters of the linear equation are fixed, and the adjustment phase ends.

[0096] Step 41, the step of controlling the current screw speed to decrease relative to the initial screw speed, includes:

[0097] Reduce the current value of the screw drive pump to control the speed of the screw drive motor to decrease;

[0098] Step 42, the step of controlling the real-time screw speed to increase relative to the initial screw speed, includes:

[0099] Increase the current value of the screw drive pump to control the increase of the speed of the screw drive motor.

[0100] The screw drive device includes a screw drive pump and a screw drive motor. The screw drive pump drives the screw drive motor to rotate, and the screw drive motor in turn drives the screw to rotate. The screw speed is directly proportional to the screw drive motor speed; if the screw speed decreases, the screw drive motor speed decreases. In this case, it is necessary to control the pump displacement of the screw drive pump to decrease, which is achieved by reducing the current of the screw drive pump. If the screw speed increases, the screw drive motor speed increases. In this case, it is necessary to control the pump displacement of the screw drive pump to increase, which is achieved by increasing the current of the screw drive pump.

[0101] In some embodiments, the step of determining that the actual material level width is less than the preset material level width includes:

[0102] If the ironing board is extended, it is determined that the actual material width is less than the preset material width.

[0103] The step of determining that the actual material level width is greater than the preset material level width includes:

[0104] If the retraction command of the ironing board is received, it is determined that the actual material width is less than the preset material width.

[0105] Combination Figure 6As shown, when the ironing plate extension command is received, the ironing plate extension mechanism drives the ironing plate to extend, increasing the spreading width, the preset material position width, and the preset output amount. The actual material position width is less than the preset material position width, and the actual output amount is less than the preset output amount. The feeding speed can be increased by increasing the screw speed, which means that the reference slope k of the two-dimensional linear relationship is reduced to the first slope k1, thereby increasing the actual feeding amount.

[0106] Upon receiving the retraction command from the ironing board, the telescopic mechanism of the ironing board causes it to retract, reducing the spreading width, the preset material position width, and the preset output amount. The actual material position width is greater than the preset material position width, and the actual output amount is greater than the preset output amount. This can be achieved by reducing the screw speed, which means increasing the baseline slope k of the linear equation to the second slope k2, thereby reducing the actual output amount.

[0107] The screed's extension and retraction commands can be user-inputted or automatically generated after the screed moves. An extension command is generated when the paving width increases, and a retraction command is generated when the paving width decreases.

[0108] In the event of a deviation between the actual output and the preset output, the screw speed can be adjusted by changing the slope of the linear equation to ensure that the actual output meets the preset output.

[0109] The material distribution control method for the paver in this embodiment of the invention further includes:

[0110] Step 50: If the change in the set material level height is obtained, then the reference parameter a of the binary linear relationship is re-determined based on the reference slope, the initial screw speed and the changed set material level height.

[0111] After the set material level height changes, the reference slope k remains unchanged. The changed set material level height will affect the reference parameter a of the two-dimensional linear relationship. Therefore, by combining the reference slope, the initial auger speed and the changed set material level height, the reference parameter a is redefined to obtain a new two-dimensional linear relationship. The paver is then controlled to distribute materials according to the new two-dimensional linear relationship.

[0112] In some embodiments, step 50, determining the change in the set material level height, includes:

[0113] If a spiral lifting command is received, the set material level height will be increased.

[0114] or,

[0115] If a spiral descent command is received, the set material level height will be reduced.

[0116] Combination Figure 6As shown, the spiral lifting or lowering directly affects the material level height. Therefore, if a spiral lifting command or spiral lowering command is received, it is determined whether the set material level height increases or decreases. The change in the set material level height will affect the value of the reference parameter 'a' in the linear equation. Therefore, it is necessary to recalculate the reference parameter 'a' in the linear equation.

[0117] The spiral lifting and spiral lowering commands can be user-input commands or commands automatically generated after the spiral motion.

[0118] Of course, the material level height change can also be set to the material level height change input into the controller.

[0119] In some embodiments, step 10, the step of obtaining the initial auger speed of the paver, includes:

[0120] The initial auger speed is determined based on the paver's travel speed, paving width, paving thickness, and auger height.

[0121] Based on the paver's travel speed, paving thickness, and paving width, the required material volume can be determined. Then, combined with the required material volume, auger height, and auger structural parameters, the initial auger speed is calculated, and the auger distributor is controlled to operate at the initial auger speed.

[0122] It should be noted that the initial spiral velocity can also be determined by combining the material properties and road conditions, and there is no limit to the calculation method of the initial spiral velocity.

[0123] When the initial auger speed changes, the baseline parameters of the linear equation in two variables are recalculated. That is, when the paver's travel speed, paving width, paving thickness, and auger height change, the baseline parameters of the linear equation in two variables are recalculated.

[0124] Based on the above, refer to Figures 1 to 6 As shown, the paver material distribution control method of this embodiment of the invention pre-calculates a linear relationship between the material level height and the target auger speed. Based on changes in actual working conditions, it automatically adjusts the reference slope or reference parameter of the linear relationship, providing a method for automatically adjusting material distribution. This improves material distribution stability, increases distribution accuracy, reduces operational requirements for construction personnel, and enhances the paving performance of the paver. Furthermore, the material distribution control method of this embodiment of the invention is linked to the lifting and lowering of the auger distributor and the extension and retraction of the screed, enabling automatic material distribution adjustment after various working condition adjustments.

[0125] According to a second aspect of the present invention, a paver material distribution system is provided for executing the paver material distribution control method described in any of the above claims. The system includes: a auger distributor, an auger drive device, and a controller. The auger distributor is connected to the output end of the auger drive device, and the auger drive device is communicatively connected to the controller. Since the paver material distribution control method has the aforementioned beneficial effects, the paver material distribution system also has the aforementioned beneficial effects. For details, please refer to the above description; further elaboration is not provided here.

[0126] The screw drive device is used to drive the screw distributor to rotate. The screw drive device includes a screw drive pump and a screw drive motor to adjust the speed of the screw distributor, thereby adjusting the feeding speed and the actual output.

[0127] The controller can execute the material distribution control method of the paver. The controller can send control commands to the auger drive device to adjust the speed of the auger distributor.

[0128] The material distribution system of the paver in this embodiment of the invention also includes a lifting mechanism for the auger distributor. The lifting mechanism is communicatively connected to the controller, and the controller can send control commands to the lifting mechanism, such as auger lifting commands and auger lowering commands, to adjust the height of the auger distributor.

[0129] The material distribution system of the paver in this embodiment of the invention also includes a screed and a telescopic mechanism. The telescopic mechanism is communicatively connected to a controller. The controller is used to send control commands to the telescopic mechanism, such as extension commands and retraction commands, to control the extension or retraction of the screed to adjust the width of the screed.

[0130] A third aspect of the present invention provides a paver, including the material distribution system of the paver as described above, which will not be repeated here.

[0131] Figure 7 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 7 As shown, the electronic device may include a processor 810, a communication interface 820, a memory 830, and a communication bus 840. The processor 810, communication interface 820, and memory 830 communicate with each other via the communication bus 840. The processor 810 can call logical instructions from the memory 830 to execute the aforementioned paver material distribution control method.

[0132] Furthermore, the logical instructions in the aforementioned memory 830 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, essentially, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0133] On the other hand, the present invention also provides a computer program product, the computer program product including a computer program stored on a non-transitory computer-readable storage medium, the computer program including program instructions, and when the program instructions are executed by a computer, the computer is able to execute the paver material distribution control method provided by the above methods.

[0134] In another aspect, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to perform the material distribution control method for the paver provided by the above methods.

[0135] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0136] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0137] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for controlling the material distribution of a paver, characterized in that, include: Get the paver's maximum auger speed, minimum auger speed, adjustable material level difference, initial auger speed, set material level height, actual material level height, and current auger speed; Based on the difference between the minimum and maximum screw speeds and the adjustable height difference of the material level, the baseline slope k of the linear equation relating the material level height and the target screw speed is determined, where k = (vmin - vmax) / Δh, vmin represents the minimum screw speed, vmax represents the maximum screw speed, and Δh represents the adjustable height difference of the material level. The baseline slope k is a negative number. The reference parameter a of the binary linear relationship is determined based on the reference slope k, the initial screw speed, and the set material level height. By adjusting the reference slope k and / or reference parameter a of the binary linear relationship, the actual output of the paver is controlled to meet the preset output. The linear equation is expressed as: y = kx + a, where y represents the target screw speed and x represents the material level height.

2. The material distribution control method for a paver according to claim 1, characterized in that, The step of controlling the actual output of the paver to meet the preset output by adjusting the reference slope k and / or reference parameter a of the binary linear relationship includes: If the actual output of the paver is determined to be less than the preset output, the reference slope k of the linear equation is controlled to decrease to a first slope k1. Based on the linear equation of the first slope k1 and the actual material level, the current auger speed is controlled to increase relative to the initial auger speed until the actual output reaches the preset output. The set material level and the initial auger speed form a set coordinate point, and the set coordinate point lies on the straight line corresponding to the linear equation of the first slope k1. or, If the actual output of the paver is determined to be greater than the preset output, the reference slope k of the linear equation is increased to a second slope k2. Based on the linear equation of the second slope k2 and the actual material level, the current auger speed is controlled to decrease relative to the initial auger speed until the actual output reaches the preset output. The set material level and the initial auger speed form a set coordinate point, which lies on the straight line corresponding to the linear equation of the second slope k2, where the second slope k2 is negative.

3. The material distribution control method for a paver according to claim 2, characterized in that, The step of determining that the actual output of the paver is less than the preset output includes: Determine that the actual material level height is less than the set material level height; and / or, determine that the actual material level width is less than the preset material level width; The step of determining that the actual output of the paver is greater than the preset output includes: Determine that the actual material level height is greater than the set material level height; and / or, determine that the actual material level width is greater than the preset material level width.

4. The material distribution control method for a paver according to claim 3, characterized in that, The step of determining that the actual material level width is less than the preset material level width includes: If the ironing board is extended, it is determined that the actual material width is less than the preset material width. The step of determining that the actual material level width is greater than the preset material level width includes: If the retraction command of the ironing board is received, it is determined that the actual material width is greater than the preset material width.

5. The material distribution control method for a paver according to claim 2, characterized in that, The step of controlling the current helical speed to decrease relative to the initial helical speed includes: Reduce the current value of the screw drive pump to control the speed of the screw drive motor to decrease; The step of increasing the current helical speed relative to the initial helical speed includes: Increase the current value of the screw drive pump to control the increase of the speed of the screw drive motor.

6. The material distribution control method for a paver according to claim 1, characterized in that, Also includes: Once the change in the set material level height is obtained, the reference parameter a of the binary linear relationship is re-determined based on the reference slope k, the initial screw speed, and the changed set material level height.

7. The material distribution control method for a paver according to claim 6, characterized in that, The step of obtaining the change in the set material level height includes: If a spiral lifting command is received, the set material level height will be increased. or, If a spiral descent command is received, the set material level height will be reduced.

8. The material distribution control method for a paver according to any one of claims 1 to 7, characterized in that, The steps for obtaining the initial auger speed of the paver include: The initial auger speed is determined based on the paver's travel speed, paving width, paving thickness, and auger height.

9. A material distribution system for a paver used to execute the material distribution control method of the paver according to any one of claims 1 to 8, characterized in that, include: The system includes a screw feeder, a screw drive device, and a controller. The screw feeder is connected to the output end of the screw drive device, and the screw drive device is communicatively connected to the controller.

10. A paver, characterized in that, Includes the material distribution system of the paver as described in claim 9.

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