Axle load determination method and device, equipment, medium and program product

Abstract

The invention discloses an axle load determination method, device and equipment, a medium and a program product. The axle load determination method comprises the following steps: acquiring a rear axle load sent by an electronically controlled air suspension system (ECAS) associated with a rear axle of a vehicle; according to the rear axle load and the mass and the deployment position of the vehicle part on the frame, the front axle load of the vehicle is calculated based on the moment balance constraint; according to the current front tire pressure of the vehicle and the corresponding relation between the front tire pressure interval and the front axle load interval, the front axle load interval corresponding to the front tire pressure is determined; and comparing the front axle load with the front axle load interval, and displaying the rear axle load and the front axle load under the condition that the front axle load belongs to the front axle load interval. According to the technical scheme provided by the embodiment of the invention, the front axle load of the front leaf spring suspension and rear air suspension tractor can be obtained without depending on external weighing equipment and adding additional sensors.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle load, and particularly to an axle load determination method, device, equipment, medium and program product. Background Art

[0002] With the increasing scale of commercial vehicle use, users' requirements for vehicle performance evaluation are becoming more and more comprehensive. The axle load of an automobile is a necessary parameter in the processes of frame strength, suspension performance matching, and vehicle safety analysis.

[0003] In the prior art, the method for determining the axle load of a tractor is mainly to measure based on fixed external measurement tools such as weighbridges, which requires relying on external measurement tools. There are also some methods for calculating the axle load without using external weighing equipment, but all of them require installing additional sensors or special information collection devices, resulting in additional hardware costs. Summary of the Invention

[0004] The present invention provides an axle load determination method, device, equipment, medium and program product to solve the problem that the existing axle load measurement methods rely on external measurement tools or sensors and have high measurement costs.

[0005] According to one aspect of the present invention, there is provided an axle load determination method, including:

[0006] Obtaining the rear axle load sent by an electronically controlled air suspension system (ECAS) associated with the rear axle of the vehicle;

[0007] Calculating the front axle load of the vehicle based on the moment balance constraint according to the rear axle load, as well as the mass and deployment position of vehicle components on the frame;

[0008] Determining the front axle load range corresponding to the current front tire pressure according to the correspondence between the current front tire pressure of the vehicle, the front tire pressure range, and the front axle load range;

[0009] Comparing the front axle load with the front axle load range, and when the front axle load belongs to the front axle load range, displaying the rear axle load and the front axle load.

[0010] According to another aspect of the present invention, there is provided an axle load determination device, including:

[0011] A rear axle load acquisition module for obtaining the rear axle load sent by an electronically controlled air suspension system (ECAS) associated with the rear axle of the vehicle;

[0012] A front axle load calculation module for calculating the front axle load of the vehicle based on the moment balance constraint according to the rear axle load, as well as the mass and deployment position of vehicle components on the frame;

[0013] An axle load range determination module, configured to determine the front axle load range corresponding to the current front tire pressure of the vehicle according to the corresponding relationship between the current front tire pressure of the vehicle, the front tire pressure range, and the front axle load range;

[0014] An axle load display module, configured to compare the front axle load with the front axle load range, and display the rear axle load and the front axle load when the front axle load belongs to the front axle load range.

[0015] According to another aspect of the present invention, there is provided an electronic device, including:

[0016] At least one processor; and

[0017] A memory communicatively connected to the at least one processor; wherein,

[0018] The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the axle load determination method according to any embodiment of the present invention.

[0019] According to another aspect of the present invention, there is provided a computer-readable storage medium storing computer instructions for causing a processor to implement the axle load determination method according to any embodiment of the present invention when executed.

[0020] According to another aspect of the present invention, there is provided a computer program product including a computer program, and the computer program implements the axle load determination method according to any embodiment of the present disclosure when executed by a processor.

[0021] The technical solution of the embodiment of the present invention obtains the rear axle load sent by the electronic control air suspension system (ECAS) associated with the rear axle of the vehicle, and then calculates the front axle load of the vehicle based on the moment balance constraint according to the rear axle load, the mass and deployment position of the vehicle components on the vehicle frame. Further, according to the current front tire pressure of the vehicle and the corresponding relationship between the front tire pressure range and the front axle load range, the front axle load range corresponding to the front tire pressure is determined. Finally, the front axle load is compared with the front axle load range, and when the front axle load belongs to the front axle load range, the rear axle load and the front axle load are displayed. The rear axle load is collected through the ECAS system, and the front axle load is calculated according to the deployment of each vehicle component on the vehicle frame and the rear axle load. Without the need for additional deployment of sensors and without the aid of external weighing equipment, the front axle load can be obtained.

[0022] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. Brief Description of the Drawings

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0024] Figure 1 is a flowchart of a method for determining axle load according to Embodiment 1 of the present invention;

[0025] Figure 2a is a flowchart of a method for determining axle load according to Embodiment 2 of the present invention;

[0026] Figure 2b is a flowchart of axle load calculation according to Embodiment 2 of the present invention;

[0027] Figure 3 is a schematic structural diagram of an axle load determination device according to Embodiment 3 of the present invention;

[0028] Figure 4 is a schematic structural diagram of an electronic device for implementing the axle load determination method of the embodiments of the present invention. Detailed Embodiments

[0029] In order to enable those skilled in the art to better understand the solutions of the present invention, the following clearly and completely describes the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above accompanying drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present invention described here can be implemented in an order different from those illustrated or described here. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0031] Embodiment 1

[0032] Figure 1 The following is a flowchart of an axle load determination method provided by Embodiment 1 of the present invention. This embodiment is applicable to a tractor with a front leaf spring suspension and a rear air suspension. Based on the rear axle load measured by an electronically controlled air suspension system associated with the vehicle's rear axle, as well as the mass and deployment positions of various vehicle components on the vehicle frame, the front axle load condition is determined. This method can be executed by an axle load determination device, which can be implemented in the form of hardware and / or software, and can be configured in various general computing devices. For example, the computing device is a vehicle instrument. As Figure 1 shown, the method includes:

[0033] S110. Obtain the rear axle load sent by the electronically controlled air suspension system (ECAS) associated with the vehicle's rear axle.

[0034] The electronically controlled air suspension system (Electronic Control Air Suspension, abbreviated as ECAS) consists of components such as an ECAS electronic control unit, solenoid valves, height sensors, airbags, etc. The ECAS associated with the rear axle can directly read the rear axle load of the vehicle.

[0035] In a tractor configured with a front leaf spring suspension and a rear air suspension, the ECAS associated with the vehicle's rear axle can directly detect the rear axle load of the vehicle, but the front leaf spring suspension cannot directly obtain the front axle load. In the prior art, the axle load is often measured based on fixed external measurement tools such as weighbridges, or by installing additional sensors or dedicated information collection devices.

[0036] When the vehicle is powered on but not moving, or when the driving time, driving mileage, and vehicle speed are all low, there is often a need for axle load measurement. In the embodiments of the present invention, in order to determine the front axle load of the vehicle without relying on external measurement tools or additional sensors in scenarios where there is a need for axle load measurement, the instrument first needs to obtain the rear axle load read by the ECAS associated with the vehicle's rear axle, and use the read rear axle load as a data basis to further calculate the front axle load. Specifically, the instrument can send an axle load acquisition request to the ECAS and receive the rear axle load sent by the ECAS in response to the axle load acquisition request.

[0037] S120. Calculate the front axle load of the vehicle based on the rear axle load, as well as the mass and deployment positions of the vehicle components on the vehicle frame, based on the moment balance constraint.

[0038] The vehicle components deployed on the vehicle frame may include the vehicle's front axle, rear axle, front leaf spring suspension, rear air suspension, fuel tank, and aftertreatment device, etc.

[0039] In an embodiment of the present invention, in order to determine the front axle load of a vehicle without relying on external measuring tools or additional sensors, the mass and deployment positions of vehicle components on the vehicle frame are acquired in advance. Subsequently, based on the principle of moment balance, according to the rear axle load, as well as the mass and deployment positions of vehicle components on the vehicle frame, the front axle load of the vehicle is calculated.

[0040] In a specific example, according to the principle of moment balance, the front axle load F1 can be calculated by the following formula:

[0041]

[0042] where F2 is the rear axle load, L2 is the distance between the center of the saddle and the connection point between the electronically controlled air suspension associated with the rear axle of the vehicle and the vehicle frame, L is the distance between the front axle of the vehicle and the connection point between the electronically controlled air suspension associated with the rear axle of the vehicle and the vehicle frame, Mx is the mass of other vehicle components on the vehicle frame except the front axle and the rear axle of the vehicle, and L x1 is the distance from other vehicle components on the vehicle frame except the front axle and the rear axle of the vehicle to the front axle of the vehicle.

[0043] S130. Determine the front axle load range corresponding to the current front tire pressure of the vehicle according to the correspondence between the current front tire pressure of the vehicle, the front tire pressure range, and the front axle load range.

[0044] The front axle load range is used to verify the reliability of the calculated front axle load, and the front axle load range is obtained in advance by measuring the correlation between the front tire pressure and the front axle load.

[0045] In an embodiment of the present invention, in order to obtain the current front tire pressure of the vehicle through a tire pressure sensor, and then determine the front axle load range corresponding to the front tire pressure according to the correspondence between the front tire pressure range and the front axle load range. Specifically, determine the target front tire pressure range to which the current front tire pressure of the vehicle belongs, and use the front axle load range corresponding to the target front tire pressure range as the front axle load range corresponding to the front tire pressure.

[0046] S140. Compare the front axle load with the front axle load range, and when the front axle load belongs to the front axle load range, display the rear axle load and the front axle load.

[0047] In an embodiment of the present invention, the calculated front axle load is compared with the front axle load range. If the front axle load belongs to the front axle load range, it indicates that the reliability of the calculated front axle load is high, and then the rear axle load and the front axle load are displayed. By comparing the front axle load with the front axle load range, the reliability of the front axle load can be further discriminated, and when the reliability meets the requirements, the front axle load and the rear axle load are displayed.

[0048] In the technical solution of the embodiment of the present invention, the rear axle load sent by the electronically controlled air suspension system (ECAS) associated with the rear axle of the vehicle is obtained. Then, based on the moment balance constraint, the front axle load of the vehicle is calculated according to the rear axle load, as well as the mass and deployment position of the vehicle components on the vehicle frame. Further, according to the current front tire pressure of the vehicle, and the corresponding relationship between the front tire pressure interval and the front axle load interval, the front axle load interval corresponding to the front tire pressure is determined. Finally, the front axle load is compared with the front axle load interval. When the front axle load belongs to the front axle load interval, the rear axle load and the front axle load are displayed. The rear axle load is collected by the ECAS system, and the front axle load is calculated according to the deployment of each vehicle component on the vehicle frame and the rear axle load. Without the need for additional deployed sensors and without the aid of external weighing equipment, the front axle load can be obtained.

[0049] Embodiment 2

[0050] Figure 2a The flowchart of an axle load determination method provided by Embodiment 2 of the present invention is shown. This embodiment is further refined on the basis of the above embodiment, and provides specific steps for recalculating after adjusting the front axle load calculation parameters when the front axle load does not belong to the front axle load interval. As Figure 2a shown, the method includes:

[0051] S210. Obtain the rear axle load sent by the electronically controlled air suspension system (ECAS) associated with the rear axle of the vehicle.

[0052] Optionally, before obtaining the rear axle load sent by the electronically controlled air suspension system (ECAS) associated with the rear axle of the vehicle, it further includes:

[0053] When the vehicle is carrying different loads, obtain the front tire pressure, front axle load, rear tire pressure, and rear axle load of the vehicle;

[0054] According to the front tire pressure and front axle load under different loads, fit the first curve of the front axle load changing with the front tire pressure, and according to the rear tire pressure and rear axle load under different loads, fit the second curve of the rear axle load changing with the rear tire pressure;

[0055] According to the set tire pressure segmentation unit, segment the first curve to obtain at least one first sub-curve, and according to the set tire pressure segmentation unit, segment the second curve to obtain at least one second sub-curve;

[0056] Based on the first sub-curve, determine the corresponding relationship between the front tire pressure interval and the front axle load interval, and based on the second sub-curve, determine the corresponding relationship between the rear tire pressure interval and the rear axle load interval.

[0057] In this optional embodiment, before obtaining the rear axle load sent by the electronically controlled air suspension system (ECAS) associated with the vehicle's rear axle, it is necessary to establish the correspondence between the tire pressure range and the axle load range, which is specifically as follows: For the tire model adapted to the vehicle to be tested, by adding different values of load to the vehicle, the front tire pressure, rear tire pressure, the weight borne by the front wheels, and the weight borne by the rear wheels of the vehicle can be obtained under each load. Further, by subtracting the weight of the front wheel assembly from the weight borne by the front wheels, the front axle load is obtained. Similarly, by subtracting the weight of the rear wheel assembly from the weight borne by the rear wheels, the rear axle load is obtained. Here, the weight of the front wheel assembly and the weight of the rear wheel assembly are the total weights of the tires and the rims.

[0058] Further, according to the front tire pressure and the front axle load under different loads, with the front tire pressure as the abscissa and the front axle load as the ordinate, the first curve of the front axle load changing with the front tire pressure is fitted. Similarly, according to the rear tire pressure and the rear axle load under different loads, the second curve of the rear axle load changing with the rear tire pressure is fitted.

[0059] Further, according to the set tire pressure segmentation unit, the first curve is segmented to obtain at least one first sub-curve, and according to the set tire pressure segmentation unit, the second curve is segmented to obtain at least one second sub-curve. Here, the set tire pressure segmentation unit can be the smallest interval recognizable by the on-vehicle tire pressure detection system.

[0060] For each first sub-curve in the first curve, the front tire pressure range and the corresponding front axle load range can be determined. Similarly, for each second sub-curve in the second curve, the rear tire pressure range and the corresponding rear axle load range can be determined. The correspondence between the front tire pressure range and the front axle load range associated with the first curve, and the correspondence between the rear tire pressure range and the rear axle load range associated with the second curve are stored for subsequent verification of the rationality of the axle load.

[0061] In a specific example, the weight of the front and rear wheel assemblies of the vehicle can be obtained in the following way: Install the tire on the rim and inflate it according to the standard tire pressure specified for the tire. After the tire is inflated to the standard tire pressure, use a tire pressure measuring instrument to confirm the tire pressure value again and record it. Then measure and record the weight of the entire wheel assembly (including the tire and the rim), and take the average value of multiple measurements as the weight of the wheel assembly.

[0062] Install the installed wheel assembly on the vehicle, and then place it on the weighing platform. When the vehicle is in an empty vehicle state and completely stationary, through the data acquisition system of the weighing platform, accurately record the weights borne by the front and rear tires respectively, and at the same time use a tire pressure detection tool to measure and record the tire pressures of the front and rear tires again.

[0063] Prepare a series of standard loads with fixed values. Starting from the unloaded state of the vehicle, sequentially add these loads with fixed values to the vehicle. During the loading process, ensure that the loads are evenly distributed within the load-bearing area at the initial installation position of the vehicle saddle. Record the weights borne by the front and rear tires, and simultaneously use tire pressure detection equipment to measure and record the tire pressure values of the front and rear tires at this time. Continuously repeat the loading process until the maximum load-bearing capacity designed for the vehicle is reached or the requirements for the preset experimental loading times are met. After completing the loading test, unload the loads in the reverse order of loading. Measure and record the weights borne by the front and rear tires and the corresponding tire pressures respectively, as the data basis for subsequently determining the corresponding relationship between tire pressure and axle load range.

[0064] S220. Calculate the front axle load of the vehicle based on the moment balance constraint according to the rear axle load and the mass and deployment positions of the vehicle components on the frame.

[0065] Optionally, calculate the front axle load of the vehicle based on the moment balance constraint according to the rear axle load and the mass and deployment positions of the vehicle components on the frame, including:

[0066] Calculate the first distance between the center of the saddle and the connection point between the electronically controlled air suspension associated with the rear axle of the vehicle and the frame according to the deployment position of the saddle on the frame;

[0067] Calculate the second distance between the front axle of the vehicle and the connection point between the electronically controlled air suspension associated with the rear axle of the vehicle and the frame;

[0068] Calculate the third distance between the other vehicle components and the front axle of the vehicle according to the deployment positions of the other vehicle components on the frame except the front axle and the rear axle of the vehicle;

[0069] Calculate the front axle load of the vehicle based on the moment balance constraint according to the mass of the other vehicle components, the first distance, the second distance, the third distance, and the rear axle load.

[0070] In this optional embodiment, a specific method for calculating the front axle load of the vehicle based on the moment balance constraint according to the rear axle load and the mass and deployment positions of the vehicle components on the frame is provided: The first distance between the center of the saddle and the connection point between the electronically controlled air suspension associated with the rear axle of the vehicle and the frame can be calculated according to the deployment position of the saddle on the frame, and then the second distance between the front axle of the vehicle and the connection point between the electronically controlled air suspension associated with the rear axle of the vehicle and the frame can be calculated. The third distance between the other vehicle components and the front axle of the vehicle is calculated according to the deployment positions of the other vehicle components on the frame except the front axle and the rear axle of the vehicle. Finally, the front axle load of the vehicle is calculated based on the moment balance constraint according to the mass of the other vehicle components, the first distance, the second distance, the third distance, and the rear axle load. The specific calculation method is as follows:

[0071]

[0072] Wherein, F2 is the rear axle load, L2 is the distance between the center of the saddle and the connection point between the electronically controlled air suspension associated with the rear axle of the vehicle and the vehicle frame, L is the distance between the front axle of the vehicle and the connection point between the electronically controlled air suspension associated with the rear axle of the vehicle and the vehicle frame, Mx is the mass of other vehicle components on the vehicle frame except the front axle and the rear axle of the vehicle, and L x1 is the distance from other vehicle components on the vehicle frame except the front axle and the rear axle of the vehicle to the front axle of the vehicle.

[0073] Wherein, the mass of other vehicle components includes the unsprung mass of the front axle, the mass of the leaf spring, the unsprung mass of the front axle, the unsprung mass of the rear axle, the mass of the air suspension system, and the unsprung mass of the rear axle, etc. The distance from other vehicle components on the vehicle frame except the front axle and the rear axle of the vehicle to the front axle of the vehicle includes the front offset, the distance from the center of the fuel tank in the fuel vehicle to the front axle, or the distance from the center of gravity of the liquefied natural gas cylinder in the liquefied natural gas vehicle to the front axle, and the distance from the center of gravity of the urea tank in the aftertreatment device to the front axle, etc. In addition, the fuel density, liquefied natural gas density, urea solution density, etc. are also required.

[0074] It should be noted that the mass of some other vehicle components will change during the vehicle driving. For example, the mass of the fuel tank will become smaller as the fuel is consumed during the vehicle driving, and the mass of the aftertreatment device will become smaller as the urea capacity in the aftertreatment device decreases. The specific mass calculation formula is as follows:

[0075] M = ρ·V·g·p%

[0076] Wherein, M is the fuel weight, ρ is the fuel density, V is the maximum volume of the fuel tank, p% is the remaining ratio of the current fuel, and L x1 is the distance from the geometric center of gravity of the current vehicle component to the front axle of the vehicle, and g is the acceleration due to gravity.

[0077] Optionally, before calculating the front axle load of the vehicle, it further includes:

[0078] According to the current rear tire pressure of the vehicle and the corresponding relationship between the rear tire pressure range and the rear axle load range, determine the rear axle load range corresponding to the rear tire pressure;

[0079] Compare the rear axle load with the rear axle load range, and issue an abnormal warning when the rear axle load does not belong to the rear axle load range.

[0080] In this optional embodiment, the operations before calculating the front axle load of the vehicle are provided: obtain the current rear tire pressure of the vehicle, and according to the corresponding relationship between the rear tire pressure range and the rear axle load range, determine the target rear tire pressure range to which the rear tire pressure belongs. Determine the rear axle load range corresponding to the target rear tire pressure range as the rear axle load range corresponding to the rear tire pressure.

[0081] Compare the rear axle load with the rear axle load range. If the rear axle load does not belong to the rear axle load range, it indicates that there is a problem with the accuracy of ECAS detection. Furthermore, the front axle load calculated based on the rear axle load will also be inaccurate. At this time, an abnormal warning will be issued to remind the driver that there may be an abnormality in the axle load display function and that the driving safety of the vehicle needs to be promptly concerned.

[0082] S230. Determine the front axle load range corresponding to the front tire pressure according to the current front tire pressure of the vehicle and the corresponding relationship between the front tire pressure range and the front axle load range.

[0083] S240. Compare the front axle load with the front axle load range. When the front axle load belongs to the front axle load range, display the rear axle load and the front axle load.

[0084] S250. When the front axle load does not belong to the front axle load range, update the first distance according to the front axle load.

[0085] The first distance is the distance between the center of the saddle and the connection point between the electronically controlled air suspension associated with the rear axle of the vehicle and the vehicle frame.

[0086] There are multiple sets of reserved connection positions on the saddle connecting plate of the vehicle. The saddle can move forward and backward by a set length, for example, 50 cm, as needed, but cannot exceed the set threshold (for example, not exceeding 150 cm). The movement of the saddle has a relatively obvious impact on the front axle load.

[0087] In the embodiment of the present invention, the process of axle load calculation is as Figure 2b shown. When the front axle load does not belong to the front axle load range, it may be because the user manually adjusts the position of the saddle, and the position of the saddle is related to the first distance used in the calculation of the front axle load. Therefore, update the first distance according to the front axle load. Specifically, when the front axle load does not belong to the front axle load range, randomly select a position from each of the other optional positions except the default position of the saddle to update the first distance.

[0088] It is also possible to reduce the first distance according to the set length of the saddle adjustment gear (the distance between adjacent connection positions in the reserved saddle connection positions on the connecting plate) when the front axle load is greater than the maximum value of the front axle load range; similarly, it is possible to increase the first distance according to the set length of the saddle adjustment gear when the front axle load is less than the minimum value of the front axle load range.

[0089] It is also possible to calculate the difference between the front axle load and the value before the maximum value of the front axle load range when the front axle load is greater than the maximum value of the front axle load range, determine the adjustment length according to the difference, and reduce the first distance by the adjustment length.

[0090] Optionally, update the first distance according to the front axle load, including at least one of the following:

[0091] When the front axle load is greater than the maximum value of the front axle load range, reduce the first distance according to the unit length of the vehicle saddle adjustment;

[0092] When the front axle load is less than the minimum value of the front axle load range, increase the first distance according to the unit length of the vehicle saddle adjustment.

[0093] In this optional embodiment, when the front axle load is greater than the maximum value of the front axle load range, it may be because the saddle has been moved backward by a certain distance. At this time, the first distance can be reduced according to the unit length of the vehicle saddle adjustment. When the front axle load is less than the minimum value of the front axle load range, it may be because the saddle has been moved forward by a certain distance. According to the unit length of the vehicle saddle adjustment, the first distance is increased. According to the comparison result between the front axle load and the front axle load range, the adjustment direction of the first distance can be determined, which can improve the front axle load correction efficiency compared with randomly adjusting the first distance.

[0094] S260. Calculate the updated front axle load based on the moment balance constraint according to the mass of other vehicle components, the updated first distance, the second distance, the third distance, and the rear axle load.

[0095] In the embodiment of the present invention, after updating the first distance, continue to calculate the updated front axle load based on the moment balance constraint according to the mass of other vehicle components, the updated first distance, the second distance, the third distance, and the rear axle load. The calculation method is the same as the first calculation and will not be elaborated here.

[0096] S270. Compare the updated front axle load with the front axle load range. If the updated front axle load does not belong to the front axle load range, return to perform the operation of updating the first distance until the updated front axle load belongs to the front axle load range or the updated first distance reaches the set threshold.

[0097] In the embodiment of the present invention, continue to compare the updated front axle load with the front axle load range. If the updated front axle load is within the front axle load range, directly display the front axle load and the rear axle load. If the updated front axle load still does not belong to the front axle load range, return to perform the operation of updating the first distance until the updated front axle load belongs to the front axle load range or the updated first distance reaches the set threshold. According to the calculated value of the front axle load, continuously adjust the first distance, which can calculate a reasonable front axle load without adding additional sensors and reduce the cost of the axle load display function.

[0098] In a specific example, when the front axle load is greater than the maximum value of the front axle load range, it may be because the saddle has been moved backward by a certain distance. Reduce the first distance by 50 cm compared to the original value. Here, 50 cm is the unit length of each backward adjustment of the saddle. Then, recalculate the front axle load based on the adjusted first distance, and compare the recalculated front axle load with the front axle load range again. If the two ranges match, it indicates that the adjusted saddle position parameter is reasonable and can make the front axle load calculation result consistent with the actual situation. At this time, update the adjusted saddle position parameter and the corresponding front axle load calculation result to the vehicle's database. These updated data will be used as the basic data for axle load monitoring and analysis during subsequent vehicle driving to ensure that the system can continuously and accurately reflect the axle load status of the vehicle.

[0099] If after one adjustment, the updated front axle load is still greater than the maximum value of the front axle load range, then reduce the first distance by 50 cm again, and repeat the above axle load calculation and comparison process.

[0100] If after reaching the rearward movement limit of the saddle (for example, moving backward by at most 150 cm), the front axle load obtained by the ECAS is still higher than the front axle load range, it indicates that there may be certain problems with the current axle load calculation and monitoring system. In this case, perform the final axle load calculation according to the rearward movement limit situation of the saddle and generate a report. The report content includes the comparison of the front axle load data, the process and results of multiple adjustments, and the analysis and judgment of the possible inaccuracy of the axle load display function. At the same time, send a corresponding warning message on the vehicle's dashboard to remind the driver that the axle load display function may be abnormal and that they need to pay attention to the driving safety of the vehicle in a timely manner.

[0101] Optionally, the technical solution of the embodiment of the present invention further includes:

[0102] When the front axle load does not belong to the front axle load range, obtain the adjustment information of the saddle;

[0103] Update the first distance according to the adjustment information of the saddle;

[0104] Calculate the updated front axle load based on the moment balance constraint according to the mass of other vehicle components, the updated first distance, the second distance, the third distance, and the rear axle load.

[0105] In this alternative embodiment, another adjustment method is provided for the case where the front axle load does not fall within the front axle load range: when the front axle load does not fall within the front axle load range, request the current saddle position from the saddle position sensor installed on the saddle, calculate the adjustment information of the saddle based on the current saddle position and the default saddle position. Then, update the first distance according to the adjustment information of the saddle. Finally, calculate the updated front axle load based on the mass of other vehicle components, the updated first distance, the second distance, the third distance, and the rear axle load, subject to the moment balance constraint. By directly obtaining the saddle adjustment information through the sensor, the accurate first distance can be directly obtained, saving the calculation amount of the front axle load.

[0106] Furthermore, the updated front axle load can be compared with the front axle load range. If the updated front axle load still does not fall within the front axle load range, an abnormal warning can be issued.

[0107] When the vehicle is powered on but not moving, or when the driving time, driving mileage, and vehicle speed are all low, the instrument will calculate the corresponding axle load range based on the tire pressure signal transmitted back by the tire pressure sensor and guide the axle load calculation algorithm to calculate the front axle load. If the driver does not adjust the instrument to the axle load display function, the refresh rate of the axle load calculation and display is reduced to relieve the computing power pressure of the instrument. If the driver adjusts the instrument to the axle load display function, the refresh rate of the axle load calculation and display is increased to meet the driver's close attention to the vehicle axle load.

[0108] When the vehicle is driving at a high speed and the driver does not adjust the instrument to the axle load display function, the background automatically stops the relevant calculations related to the front axle load. If the driving mileage is long and the impact of the vehicle fuel (or liquefied natural gas) and urea solution consumption on the previous front axle load calculation reaches the threshold, only the ECAS system data is used for a certain number of front axle load calculations. If the driver adjusts the instrument to the axle load display function, the front axle load is calculated at a fixed frequency.

[0109] The technical solution of the embodiment of the present invention calculates the front axle load of the vehicle based on the rear axle load read by the ECAS, as well as the mass and deployment position of the vehicle components on the vehicle frame, subject to the moment balance constraint. It can determine the front axle load without relying on external measuring equipment and without adding additional sensors, and perform reliability verification on the front axle load according to the front axle load range calculated from the tire pressure. When the calculated front axle load does not match the front axle load range, the axle load calculation parameters can be updated according to the front axle load, which can improve the reliability of the front axle load calculation.

[0110] Embodiment III

[0111] Figure 3 This is a schematic structural diagram of an axle load determination device provided in Embodiment III of the present invention. AsFigure 3 As shown in the figure, the device includes:

[0112] A rear axle load acquisition module 310, configured to acquire the rear axle load sent by an electronically controlled air suspension system (ECAS) associated with the vehicle's rear axle;

[0113] A front axle load calculation module 320, configured to calculate the front axle load of the vehicle based on the rear axle load, as well as the mass and deployment positions of vehicle components on the vehicle frame, based on the moment balance constraint;

[0114] A front axle load range determination module 330, configured to determine the front axle load range corresponding to the current front tire pressure of the vehicle according to the correspondence between the current front tire pressure of the vehicle and the front tire pressure range and the front axle load range;

[0115] An axle load display module 340, configured to compare the front axle load with the front axle load range, and display the rear axle load and the front axle load when the front axle load belongs to the front axle load range.

[0116] In the technical solution of the embodiment of the present invention, the rear axle load sent by the electronically controlled air suspension system (ECAS) associated with the vehicle's rear axle is acquired, and then the front axle load of the vehicle is calculated based on the rear axle load, as well as the mass and deployment positions of vehicle components on the vehicle frame, based on the moment balance constraint. Further, according to the current front tire pressure of the vehicle and the correspondence between the front tire pressure range and the front axle load range, the front axle load range corresponding to the front tire pressure is determined. Finally, the front axle load is compared with the front axle load range, and when the front axle load belongs to the front axle load range, the rear axle load and the front axle load are displayed. The rear axle load is collected through the ECAS system, and the front axle load is calculated according to the deployment of each vehicle component on the vehicle frame and the rear axle load, and the front axle load is obtained without the need for additional deployed sensors and without relying on external weighing equipment.

[0117] Optionally, the front axle load calculation module 320 includes:

[0118] A first distance calculation unit, configured to calculate a first distance between the center of the saddle and the connection point between the electronically controlled air suspension associated with the vehicle's rear axle and the vehicle frame according to the deployment position of the saddle on the vehicle frame;

[0119] A second distance calculation unit, configured to calculate a second distance between the vehicle's front axle and the connection point between the electronically controlled air suspension associated with the vehicle's rear axle and the vehicle frame;

[0120] A third distance calculation unit, configured to calculate a third distance between the other vehicle components and the vehicle's front axle according to the deployment positions of other vehicle components on the vehicle frame except for the vehicle's front axle and the vehicle's rear axle;

[0121] A front axle load calculation unit for calculating the front axle load of a vehicle based on moment balance constraints according to the mass of the other vehicle components, the first distance, the second distance, the third distance, and the rear axle load.

[0122] Optionally, the axle load determination device further includes:

[0123] A first distance update module for updating the first distance according to the front axle load when the front axle load does not belong to the front axle load interval.

[0124] A first axle load update module for calculating the updated front axle load based on moment balance constraints according to the mass of the other vehicle components, the updated first distance, the second distance, the third distance, and the rear axle load.

[0125] A front axle load determination module for comparing the updated front axle load with the front axle load interval, and when the updated front axle load does not belong to the front axle load interval, returning to perform the operation of updating the first distance until the updated front axle load belongs to the front axle load interval or the updated first distance reaches a set threshold.

[0126] Optionally, the first distance update module is specifically configured to perform at least one of the following operations:

[0127] When the front axle load is greater than the maximum value of the front axle load interval, reducing the first distance according to the unit length of vehicle saddle adjustment.

[0128] When the front axle load is less than the minimum value of the front axle load interval, increasing the first distance according to the unit length of vehicle saddle adjustment.

[0129] Optionally, the axle load determination device further includes:

[0130] A tire pressure acquisition module for acquiring the front tire pressure, front axle load, rear tire pressure, and rear axle load of the vehicle under different loads of the vehicle before acquiring the rear axle load sent by the electronically controlled air suspension system (ECAS) associated with the rear axle of the vehicle.

[0131] A curve fitting module for fitting a first curve of the front axle load varying with the front tire pressure according to the front tire pressure and front axle load under different loads, and fitting a second curve of the rear axle load varying with the rear tire pressure according to the rear tire pressure and rear axle load under different loads.

[0132] A curve segmentation module for segmenting the first curve according to a set tire pressure segmentation unit to obtain at least one first sub-curve, and segmenting the second curve according to the set tire pressure segmentation unit to obtain at least one second sub-curve.

[0133] A corresponding relationship determining module, configured to determine the corresponding relationship between the front tire pressure range and the front axle load range based on the first sub-curve, and determine the corresponding relationship between the rear tire pressure range and the rear axle load range based on the second sub-curve.

[0134] Optionally, the axle load determining device further includes:

[0135] A rear axle load range determining module, configured to determine the rear axle load range corresponding to the rear tire pressure according to the current rear tire pressure of the vehicle and the corresponding relationship between the rear tire pressure range and the rear axle load range before calculating the front axle load of the vehicle;

[0136] A warning module, configured to compare the rear axle load with the rear axle load range, and issue an abnormal warning when the rear axle load does not belong to the rear axle load range.

[0137] Optionally, the axle load determining device further includes:

[0138] An adjustment information obtaining module, configured to obtain the adjustment information of the saddle when the front axle load does not belong to the front axle load range;

[0139] A second distance updating module, configured to update the first distance according to the adjustment information of the saddle;

[0140] A second axle load updating module, configured to calculate the updated front axle load based on the moment balance constraint according to the mass of the other vehicle components, the updated first distance, the second distance, the third distance, and the rear axle load.

[0141] The axle load determining device provided by the embodiments of the present invention can execute the axle load determining method provided by any embodiment of the present invention, and has the corresponding functional modules and beneficial effects for executing the method.

[0142] In the technical solution of the present invention, the collected information is information and data authorized by the user or fully authorized by all parties, and the collection, storage, use, processing, transmission, provision, disclosure, and application of relevant data and other processes all comply with relevant laws, regulations, and standards of relevant countries and regions, take necessary confidentiality measures, do not violate public order and good customs, and provide a corresponding operation entry for the user to choose to authorize or reject.

[0143] Embodiment 4

[0144] According to an embodiment of the present invention, the present invention further provides an electronic device, a readable storage medium, and a computer program product.

[0145] Figure 4FIG. shows a schematic structural diagram of an electronic device 10 that can be used to implement an embodiment of the present invention. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, applicators, blade applicators, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or claimed herein.

[0146] As Figure 4 shown, the electronic device 10 includes at least one processor 11, and a memory communicatively connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc. The memory stores a computer program executable by the at least one processor. The processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 into the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. The input / output (I / O) interface 15 is also connected to the bus 14.

[0147] Multiple components in the electronic device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a magnetic disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0148] The processor 11 can be various general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as the axle load determination method.

[0149] In some embodiments, the axle load determination method may be implemented as a computer program tangibly embodied in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed onto the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the axle load determination method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to execute the axle load determination method by any other suitable means (e.g., by means of firmware).

[0150] The various embodiments of the systems and techniques described above in this document may be implemented in digital electronic circuitry, integrated circuit systems, field programmable gate arrays (FPGA), application specific integrated circuits (ASIC), application specific standard products (ASSP), systems on a chip (SOC), complex programmable logic devices (CPLD), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include: implemented in one or more computer programs that may be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a special-purpose or general-purpose programmable processor, that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit the data and instructions to the storage system, the at least one input device, and the at least one output device.

[0151] The computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions / operations specified in the flowcharts and / or block diagrams to be implemented. The computer programs may be executed entirely on the machine, partly on the machine, as a stand-alone software package partly on the machine and partly on a remote machine, or entirely on the remote machine or appliance.

[0152] In the context of the present invention, a computer-readable storage medium can be a tangible medium that can contain or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer-readable storage medium can include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. Alternatively, the computer-readable storage medium can be a machine-readable signal medium. More specific examples of the machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0153] To provide for interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or a trackball) by which the user can provide input to the electronic device. Other kinds of devices can also be used to provide for interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including acoustic input, voice input, or tactile input).

[0154] The systems and techniques described herein can be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer having a graphical user interface or a web browser through which the user can interact with an implementation of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of the communication network include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0155] A computing system may include a client and an applicator. The client and the applicator are generally far from each other and usually interact via a communication network. The relationship between the client and the applicator is created by computer programs running on corresponding computers and having a client-applicator relationship with each other. The applicator may be a cloud applicator, also known as a cloud computing applicator or a cloud host, which is a host product in a cloud computing application system, solving the defects of difficult management and weak business scalability existing in traditional physical hosts and VPS applications.

[0156] It should be understood that various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps recited in the present invention can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved, and no limitation is made herein.

[0157] The above specific embodiments do not constitute a limitation on the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An axle load determination method, characterized in that, Including: Obtaining the rear axle load sent by the electronically controlled air suspension system (ECAS) associated with the vehicle's rear axle; Calculating the front axle load of the vehicle based on the moment balance constraint according to the rear axle load, the mass and deployment position of vehicle components on the vehicle frame; Determining the front axle load range corresponding to the front tire pressure according to the current front tire pressure of the vehicle and the correspondence between the front tire pressure range and the front axle load range; Comparing the front axle load with the front axle load range, and displaying the rear axle load and the front axle load when the front axle load belongs to the front axle load range.

2. The method according to claim 1, wherein Calculating the front axle load of the vehicle based on the moment balance constraint according to the rear axle load, the mass and deployment position of vehicle components on the vehicle frame, including: Calculating the first distance between the center of the saddle and the connection point between the electronically controlled air suspension associated with the vehicle's rear axle and the vehicle frame according to the deployment position of the saddle on the vehicle frame; Calculating the second distance between the vehicle's front axle and the connection point between the electronically controlled air suspension associated with the vehicle's rear axle and the vehicle frame; Calculating the third distance between the other vehicle components and the vehicle's front axle according to the deployment positions of other vehicle components on the vehicle frame except for the vehicle's front axle and rear axle; Calculating the front axle load of the vehicle based on the moment balance constraint according to the mass of the other vehicle components, the first distance, the second distance, the third distance, and the rear axle load.

3. The method according to claim 2, wherein Also including: When the front axle load does not belong to the front axle load range, updating the first distance according to the front axle load; Calculating the updated front axle load based on the moment balance constraint according to the mass of the other vehicle components, the updated first distance, the second distance, the third distance, and the rear axle load; Comparing the updated front axle load with the front axle load range, and when the updated front axle load does not belong to the front axle load range, returning to perform the operation of updating the first distance until the updated front axle load belongs to the front axle load range or the updated first distance reaches the set threshold.

4. The method according to claim 3, wherein Updating the first distance according to the front axle load includes at least one of the following: When the front axle load is greater than the maximum value of the front axle load range, reducing the first distance according to the unit length of vehicle saddle adjustment; When the front axle load is less than the minimum value of the front axle load range, increasing the first distance according to the unit length of vehicle saddle adjustment.

5. The method according to claim 1, characterized in that Before obtaining the rear axle load sent by the electronically controlled air suspension system (ECAS) associated with the vehicle's rear axle, it also includes: When the vehicle is carrying different loads, obtaining the front tire pressure, the front axle load, the rear tire pressure, and the rear axle load of the vehicle; Fitting a first curve of the front axle load varying with the front tire pressure according to the front tire pressure and the front axle load under different loads, and fitting a second curve of the rear axle load varying with the rear tire pressure according to the rear tire pressure and the rear axle load under different loads; Dividing the first curve by a set tire pressure segmentation unit to obtain at least one first sub-curve, and dividing the second curve by the set tire pressure segmentation unit to obtain at least one second sub-curve; Based on the first sub-curve, determine the correspondence between the front tire pressure range and the front axle load range, and based on the second sub-curve, determine the correspondence between the rear tire pressure range and the rear axle load range.

6. The method according to claim 1, wherein Before calculating the front axle load of the vehicle, it further includes: According to the current rear tire pressure of the vehicle and the correspondence between the rear tire pressure range and the rear axle load range, determine the rear axle load range corresponding to the rear tire pressure; Compare the rear axle load with the rear axle load range, and when the rear axle load does not belong to the rear axle load range, issue an abnormal warning.

7. The method according to claim 2, wherein It further includes: When the front axle load does not belong to the front axle load range, obtain the adjustment information of the saddle; Update the first distance according to the adjustment information of the saddle; Based on the moment balance constraint, calculate the updated front axle load according to the mass of the other vehicle components, the updated first distance, the second distance, the third distance, and the rear axle load.

8. An axle load determination device, characterized in that, It includes: A rear axle load acquisition module for acquiring the rear axle load sent by the electronically controlled air suspension system (ECAS) associated with the rear axle of the vehicle; A front axle load calculation module for calculating the front axle load of the vehicle based on the moment balance constraint according to the rear axle load, the mass and deployment position of the vehicle components on the frame; An axle load range determination module for determining the front axle load range corresponding to the front tire pressure according to the current front tire pressure of the vehicle and the correspondence between the front tire pressure range and the front axle load range; An axle load display module for comparing the front axle load with the front axle load range, and when the front axle load belongs to the front axle load range, display the rear axle load and the front axle load.

9. An electronic device, characterized in that, The electronic device includes: At least one processor; and A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the axle load determination method according to any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing a processor to execute the axle load determination method according to any one of claims 1-7 when executed.

11. A computer program product, characterized in that, The computer program product includes a computer program which, when executed by a processor, implements the axle load determination method according to any one of claims 1-7.

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