A method and system for preventing a dump truck from tilting

Abstract

The present application discloses a method and system for preventing a dump truck from tipping over, by providing a rollover support mechanism for supporting the rear of the vehicle at the rear of the vehicle; obtaining the front axle load and the rear axle load of the vehicle; and determining whether to control the tipping alarm device of the vehicle to be turned on and whether to control the tipping support mechanism to be turned on according to the front axle load and the rear axle load of the vehicle. It is possible to determine whether the vehicle has a risk of tipping over according to the front axle load and the rear axle load of the vehicle, and to promptly remind the driver and passengers to make adjustments when there is a risk of tipping over through the tipping alarm device, and to support the rear of the vehicle by opening the tipping support mechanism, thereby preventing the vehicle from tipping over, effectively protecting the life and property of the vehicle and the driver and passengers on the vehicle, and thus ensuring road safety.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle stability control, and in particular to a method and system for preventing a dump truck from tilting. Background Art

[0002] When dump trucks are unloading, climbing slopes, and accelerating, the center of gravity moves backward, which reduces the front axle load and increases the rear axle load accordingly. When vehicles accelerate on a road with a large slope, the vehicle is prone to tilting and steering failure, especially when the vehicle is overloaded. This problem greatly endangers the life and property safety of the driver, and also poses a great safety hazard to other vehicles driving normally on the road.

[0003] Currently, there is a lack of effective technical solutions to prevent dump trucks and other trucks from lifting their noses during driving. Therefore, how to avoid accidents in which vehicles lift their noses during driving is a technical problem that needs to be solved. Summary of the invention

[0004] The main purpose of the present application is to provide a method and system for preventing a dump truck from tilting its nose, aiming to solve the technical problem that a dump truck or other cargo truck may tilt its nose when climbing a slope or unloading.

[0005] In a first aspect, the present application provides a method for preventing a dump truck from tilting, the method comprising the following steps:

[0006] A rollover support mechanism for supporting the rear of the vehicle is provided at the rear of the vehicle;

[0007] Obtaining the front axle load and the rear axle load of the vehicle;

[0008] Whether to control the vehicle's nose-up alarm device to be turned on and whether to control the rollover support mechanism to be turned on are determined according to the front axle load and the rear axle load.

[0009] In some embodiments, determining whether to control the vehicle's nose-up alarm device to be turned on and whether to control the rollover support mechanism to be turned on according to the front axle load and the rear axle load specifically includes the following steps:

[0010] Determine the total axle load of the vehicle according to the front axle load and the rear axle load;

[0011] Determining a ratio of the front axle load to the total axle load;

[0012] Whether to control a nose-up alarm device of the vehicle to be turned on and whether to control the rollover support mechanism to be turned on are determined according to the front axle load and the ratio.

[0013] In some embodiments, determining whether to control the vehicle's nose-up alarm device to be turned on and whether to control the rollover support mechanism to be turned on according to the front axle load and the ratio specifically includes the following steps:

[0014] If the front axle load is greater than or equal to a preset front axle load threshold, the ratio is less than or equal to a preset first ratio threshold, and the duration of the maintenance is greater than a preset first duration, the indicator light in the nose-cocking alarm device is controlled to light up.

[0015] In some embodiments, the determining whether to control the vehicle's nose-up alarm device to be turned on and whether to control the rollover support mechanism to be turned on according to the front axle load and the ratio further includes the following steps:

[0016] If the front axle load is greater than or equal to the front axle load threshold, the ratio is less than or equal to a preset second ratio threshold, and the duration of the ratio is greater than a preset second duration, the indicator light is controlled to light up, and the alarm in the nose-up alarm device is controlled to sound;

[0017] The second ratio threshold is smaller than the first ratio threshold.

[0018] In some embodiments, the determining whether to control the vehicle's nose-up alarm device to be turned on and whether to control the rollover support mechanism to be turned on according to the front axle load and the ratio further includes the following steps:

[0019] If the front axle load is less than the front axle load threshold, the ratio is less than or equal to a preset third ratio threshold, and the duration of the ratio is greater than a preset third duration, the indicator light is controlled to light up, the alarm sounds, and the flip support mechanism is controlled to open to support the rear of the vehicle;

[0020] The third ratio threshold is smaller than the second ratio threshold.

[0021] In some embodiments, the method further comprises the following steps:

[0022] After the indicator light is on or the alarm sounds, if the ratio is greater than a preset fourth ratio threshold and the duration of the ratio is greater than a preset fourth duration, the indicator light or the alarm is controlled to be turned off;

[0023] Wherein the fourth ratio threshold is greater than the first ratio threshold.

[0024] In some embodiments, the method further comprises the following steps:

[0025] When the vehicle speed is lower than the preset speed and the holding time is longer than a fourth preset time, the flip support mechanism is controlled to be opened or closed according to the received flip support mechanism switch signal.

[0026] In a second aspect, the present application also provides a system for preventing a dump truck from tilting, the system comprising:

[0027] A nose-up alarm device, which is used to be arranged in a vehicle cab;

[0028] A flip support mechanism, which is used to be arranged at the rear of the vehicle and is used to support the rear of the vehicle when it is opened;

[0029] A pressure sensor, which is used to obtain the front axle load and the rear axle load of the vehicle;

[0030] The electronic control unit ECU is used to determine whether to control the vehicle's nose-cocking alarm device to be turned on and whether to control the rollover support mechanism to be turned on according to the front axle load and the rear axle load.

[0031] In some embodiments, the ECU is further configured to:

[0032] Determine the total axle load of the vehicle according to the front axle load and the rear axle load;

[0033] Determining a ratio of the front axle load to the total axle load;

[0034] Whether to control a nose-up alarm device of the vehicle to be turned on and whether to control the rollover support mechanism to be turned on are determined according to the front axle load and the ratio.

[0035] In some embodiments, the ECU is further configured to:

[0036] If the front axle load is greater than or equal to a preset front axle load threshold, the ratio is less than or equal to a preset first ratio threshold, and the duration of the maintenance is greater than a preset first duration, the indicator light in the nose-cocking alarm device is controlled to light up.

[0037] In some embodiments, the ECU is further used to:

[0038] If the front axle load is greater than or equal to the front axle load threshold, the ratio is less than or equal to a preset second ratio threshold, and the duration of the ratio is greater than a preset second duration, the indicator light is controlled to light up, and the alarm in the nose-up alarm device is controlled to sound;

[0039] The second ratio threshold is smaller than the first ratio threshold.

[0040] In some embodiments, the ECU is further configured to:

[0041] If the front axle load is less than the front axle load threshold, the ratio is less than or equal to a preset third ratio threshold, and the duration of the ratio is greater than a preset third duration, the indicator light is controlled to light up, the alarm sounds, and the flip support mechanism is controlled to open to support the rear of the vehicle;

[0042] The third ratio threshold is smaller than the second ratio threshold.

[0043] In some embodiments, the ECU is further configured to:

[0044] After the indicator light is on or the alarm sounds, if the ratio is greater than a preset fourth ratio threshold and the duration of the ratio is greater than a preset fourth duration, the indicator light or the alarm is controlled to be turned off;

[0045] Wherein the fourth ratio threshold is greater than the first ratio threshold.

[0046] In some embodiments, the ECU is further configured to:

[0047] When the vehicle speed is lower than the preset speed and the holding time is longer than a fourth preset time, the flip support mechanism is controlled to be opened or closed according to the received flip support mechanism switch signal.

[0048] The present application provides a method and system for preventing a dump truck from tipping over, by providing a rollover support mechanism for supporting the rear of the vehicle at the rear of the vehicle; obtaining the front axle load and the rear axle load of the vehicle; and determining whether to control the tipping alarm device of the vehicle to open and whether to control the tipping support mechanism to open according to the front axle load and the rear axle load. It is possible to determine whether the vehicle has a risk of tipping over according to the front axle load and the rear axle load of the vehicle, and to promptly remind the driver and passengers to make adjustments when there is a risk of tipping over through the tipping alarm device, and to support the rear of the vehicle by opening the tipping support mechanism, thereby preventing the vehicle from tipping over, effectively protecting the life and property of the vehicle and the driver and passengers on the vehicle, and thus ensuring road safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0050] Figure 1 A schematic flow chart of a method for preventing a dump truck from tilting provided in an embodiment of the present application;

[0051] Figure 2It is a schematic diagram of the flip support mechanism when it is opened;

[0052] Figure 3 It is a schematic diagram of the flip support mechanism when it is closed;

[0053] Figure 4 A schematic block diagram of a system for preventing a dump truck from tipping over is provided for an embodiment of the present invention.

[0054] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0055] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0056] The flowcharts shown in the accompanying drawings are only examples and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps may also be decomposed, combined or partially merged, so the actual execution order may change according to actual conditions.

[0057] Embodiments of the present application provide a method and system for preventing a dump truck from tilting.

[0058] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0059] Please refer to Figure 1 , Figure 1 A schematic flow chart of a method for preventing a dump truck from tilting is provided in an embodiment of the present application.

[0060] like Figure 1 As shown, the method includes steps S1 to S3.

[0061] Step S1, a rollover support mechanism for supporting the rear end of the vehicle is provided at the rear end of the vehicle.

[0062] like Figure 2 and Figure 3 As shown, the flip support mechanism is arranged at the rear of the vehicle. When it is opened, it can contact the ground to provide support force for the rear of the vehicle. When the flip support mechanism is closed, it can be retracted and placed on the chassis of the vehicle. An electromagnetic switch is arranged on the flip support mechanism, and the electromagnetic switch can receive a control signal from the ECU to control the flip mechanism to open or close.

[0063] Step S2: Obtain the front axle load and the rear axle load of the vehicle.

[0064] For example, by setting pressure sensors at the front and rear axles of the vehicle, the pressure sensors detect the pressure size and distribution of the front and rear axles. The pressure sensors can be set between leaf spring axles. After obtaining the front axle load and the rear axle load, the pressure sensors convert the axle load information into electrical signals and transmit them to the ECU.

[0065] Step S3: determining whether to control the vehicle's nose-up alarm device to be turned on and whether to control the rollover support mechanism to be turned on according to the front axle load and the rear axle load.

[0066] It is worth mentioning that after receiving the axle load information sent by the pressure sensor, the ECU analyzes the front axle load and the rear axle load to determine whether the vehicle is at risk of tilting, and controls the vehicle's tilt alarm device to turn on to remind the driver to adjust the operation to change the vehicle status, and controls the flip support mechanism to turn on to avoid the vehicle tilting.

[0067] In some embodiments, the nose-cocking warning device is disposed inside the vehicle's driving chamber and includes an indicator light and an alarm.

[0068] Preferably, the ECU can determine whether to control the vehicle's nose-up alarm device to be turned on and whether to control the rollover support mechanism to be turned on according to the front axle load and the rear axle load, specifically including the following steps:

[0069] The total axle load of the vehicle is determined according to the front axle load and the rear axle load; and the ratio of the front axle load to the total axle load is determined; and according to the front axle load and the ratio, it is determined whether to control the vehicle's nose-up alarm device to be turned on, and whether to control the rollover support mechanism to be turned on.

[0070] Specifically, determining whether to control the vehicle's nose-up alarm device to turn on and whether to control the rollover support mechanism to turn on based on the front axle load and the ratio includes the following steps: if the front axle load is greater than or equal to a preset front axle load threshold, the ratio is less than or equal to a preset first ratio threshold, and the maintenance time is greater than a preset first time, then controlling the indicator light in the nose-up alarm device to light up.

[0071] Furthermore, the determining whether to control the vehicle's nose-up alarm device to turn on and whether to control the rollover support mechanism to turn on based on the front axle load and the ratio also includes the following steps: if the front axle load is greater than or equal to the front axle load threshold, the ratio is less than or equal to a preset second ratio threshold, and the maintenance time is greater than the preset second time, then the indicator light is controlled to light up, and the alarm in the nose-up alarm device is controlled to sound; wherein the second ratio threshold is less than the first ratio threshold.

[0072] It is worth noting that when the ratio of the front axle load to the total axle load is small, it means that the current front axle load of the vehicle accounts for a small proportion of the total axle load of the vehicle, and the difference between the front axle load and the rear axle load of the vehicle is large, but the front axle load is greater than or equal to the front axle load threshold, indicating that only the rear axle load is large at present, but the front axle is still under stress. Therefore, the vehicle currently only has the possibility of tilting, so a reminder is issued through the tilt alarm device to remind the driver to adjust the vehicle's operating status in time to avoid the vehicle tilting. In addition, in this embodiment, the two-level tilt alarm of the indicator light and the alarm can help the driver fully understand the severity of the current risk of the vehicle tilting, so as to make better adjustments to the vehicle.

[0073] Furthermore, after the indicator light is on or the alarm sounds, if the ratio is greater than a preset fourth ratio threshold and the duration is greater than a preset fourth duration, the indicator light or the alarm is controlled to be turned off; wherein the fourth ratio threshold is greater than the first ratio threshold. The ratio when the vehicle does not have a risk of nose-off can be set as the fourth ratio threshold. When the ratio is greater than the fourth ratio threshold, it means that the current state of the vehicle has been adjusted to a state where there is no risk of nose-off and is in a safe state, so the indicator light and the alarm can be turned off to avoid the indicator light and the alarm interfering with actual normal driving.

[0074] As a preferred embodiment, in addition to setting indicator lights and alarms in the cab, indicator lights and alarms can also be set outside the vehicle. The indicator lights and alarms outside the vehicle work synchronously with the indicator lights and alarms inside the vehicle, and can promptly remind other vehicles on the road to avoid the risk of the vehicle tilting, thereby ensuring that other vehicles traveling together are not harmed by the vehicle tilting problem.

[0075] Furthermore, the determining whether to control the vehicle's nose-up alarm device to turn on and whether to control the rollover support mechanism to turn on based on the front axle load and the ratio also includes the following steps: if the front axle load is less than the front axle load threshold, the ratio is less than or equal to a preset third ratio threshold, and the maintenance time is greater than the preset third time, then the indicator light is controlled to light up, the alarm sounds, and the rollover support mechanism is controlled to turn on to support the rear of the vehicle; wherein the third ratio threshold is less than the second ratio threshold.

[0076] It is worth noting that the third ratio threshold is the minimum ratio threshold set in this embodiment. When the ratio of the front axle load to the total axle load of the vehicle is less than the third ratio threshold, it indicates that the difference between the front and rear axles of the vehicle is already very large. The critical value when the vehicle tilts can be selected as the third ratio threshold. And the front axle load is less than the front axle load threshold, indicating that the current vehicle has a tendency to tilt, resulting in a smaller front axle load. Therefore, by opening the flip support mechanism to provide a support for the rear of the vehicle, the vehicle can be prevented from tilting.

[0077] Furthermore, in this embodiment, the holding time is set to be longer than a preset time to avoid misjudgment and issuing of false alarms, wherein the first time, the second time and the third time can be set according to actual conditions, and the three time can be the same or different.

[0078] As a preferred embodiment, when the front axle load of the vehicle is greater than or equal to a preset front axle load threshold, and the ratio of the front axle load to the total axle load is greater than a first threshold, it indicates that the vehicle currently has no risk of nose-over, so the ECU can transmit an electrical signal to control the indicator light, alarm and flip support mechanism to turn off.

[0079] Furthermore, the method for preventing the dump truck from tilting also includes: when the vehicle speed is lower than a preset speed and is maintained for a time period longer than a fourth preset time period, the ECU controls the flip support mechanism to open or close according to a received flip support mechanism switch signal.

[0080] Exemplarily, a manual control switch can be set for the flip support mechanism to realize manual control of the opening and closing of the flip support mechanism. The control switch can be set in the cab. When the vehicle speed is lower than 20Km / h and maintained for 5 seconds, the ECU receives the rocker switch signal and controls the rocker mechanism to open or close according to the rocker switch signal.

[0081] The embodiment of the present application provides a method and system for preventing a dump truck from tipping over, by providing a rollover support mechanism for supporting the rear of the vehicle at the rear of the vehicle; obtaining the front axle load and the rear axle load of the vehicle; and determining whether to control the tipping alarm device of the vehicle to open and whether to control the tipping support mechanism to open according to the front axle load and the rear axle load. It is possible to determine whether the vehicle is at risk of tipping over according to the front axle load and the rear axle load of the vehicle, and to promptly remind the driver and passengers to make adjustments when there is a risk of tipping over through the tipping alarm device, and to support the rear of the vehicle by opening the tipping support mechanism, thereby preventing the vehicle from tipping over, effectively protecting the life and property of the vehicle and the driver and passengers on board, and thus ensuring road safety.

[0082] Please refer to Figure 4 , Figure 4 A schematic block diagram of a system for preventing a dump truck from tilting provided in an embodiment of the present application.

[0083] like Figure 4 As shown, the device comprises:

[0084] A nose-up alarm device, which is used to be arranged in a vehicle cab;

[0085] A flip support mechanism, which is used to be arranged at the rear of the vehicle and is used to support the rear of the vehicle when it is opened;

[0086] A pressure sensor, which is used to obtain the front axle load and the rear axle load of the vehicle;

[0087] The electronic control unit ECU is used to determine whether to control the vehicle's nose-cocking alarm device to be turned on and whether to control the rollover support mechanism to be turned on according to the front axle load and the rear axle load.

[0088] Wherein, the ECU is also used for:

[0089] Determine the total axle load of the vehicle according to the front axle load and the rear axle load;

[0090] Determining a ratio of the front axle load to the total axle load;

[0091] Whether to control a nose-up alarm device of the vehicle to be turned on and whether to control the rollover support mechanism to be turned on are determined according to the front axle load and the ratio.

[0092] Wherein, the ECU is also used for:

[0093] If the front axle load is greater than or equal to a preset front axle load threshold, the ratio is less than or equal to a preset first ratio threshold, and the duration of the maintenance is greater than a preset first duration, the indicator light in the nose-cocking alarm device is controlled to light up.

[0094] Wherein, the ECU is also used for:

[0095] If the front axle load is greater than or equal to the front axle load threshold, the ratio is less than or equal to a preset second ratio threshold, and the duration of the ratio is greater than a preset second duration, the indicator light is controlled to light up, and the alarm in the nose-up alarm device is controlled to sound;

[0096] The second ratio threshold is smaller than the first ratio threshold.

[0097] Wherein, the ECU is also used for:

[0098] If the front axle load is less than the front axle load threshold, the ratio is less than or equal to a preset third ratio threshold, and the duration of the ratio is greater than a preset third duration, the indicator light is controlled to light up, the alarm sounds, and the flip support mechanism is controlled to open to support the rear of the vehicle;

[0099] The third ratio threshold is smaller than the second ratio threshold.

[0100] Wherein, the ECU is also used for:

[0101] After the indicator light is on or the alarm sounds, if the ratio is greater than a preset fourth ratio threshold and the duration of the ratio is greater than a preset fourth duration, the indicator light or the alarm is controlled to be turned off;

[0102] Wherein the fourth ratio threshold is greater than the first ratio threshold.

[0103] Wherein, the ECU is also used for:

[0104] When the vehicle speed is lower than the preset speed and the holding time is longer than a fourth preset time, the flip support mechanism is controlled to be opened or closed according to the received flip support mechanism switch signal.

[0105] It is worth noting that if Figure 4 The flip support mechanism, indicator light and alarm in the embodiment shown are all provided with electromagnetic switches, and the electromagnetic switches control the flip support mechanism, indicator light and alarm to open and close accordingly after receiving control information from the ECU.

[0106] It should be noted that those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described devices and modules and units can refer to the corresponding processes in the aforementioned embodiments and will not be repeated here.

[0107] In the above embodiment, the ECU may be a computer device. The ECU may control the flip support mechanism, the indicator light and the alarm through a computer program running on the computing device, thereby realizing the above control method.

[0108] The computer device includes a processor, a memory and a network interface connected via a system bus, wherein the memory may include a non-volatile storage medium and an internal memory.

[0109] The non-volatile storage medium can store an operating system and a computer program. The computer program includes program instructions, and when the program instructions are executed, the processor can execute any method for preventing the tip of the dump truck from tilting.

[0110] The processor is used to provide computing and control capabilities and support the operation of the entire computer equipment.

[0111] The internal memory provides an environment for the operation of the computer program in the non-volatile storage medium. When the computer program is executed by the processor, the processor can execute any method for preventing the dump truck from tilting.

[0112] It should be understood that the processor may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. Among them, the general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0113] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0114] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0115] The serial numbers of the embodiments of the present application are for description only and do not represent the advantages and disadvantages of the embodiments. The above description is only a specific implementation mode of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A method for preventing a dump truck from tilting, characterized in that: The following steps are involved: A rollover support mechanism for supporting the rear of the vehicle is provided at the rear of the vehicle; Obtaining the front axle load and the rear axle load of the vehicle; Determining whether to control a nose-up alarm device of the vehicle to be turned on and whether to control the rollover support mechanism to be turned on according to the front axle load and the rear axle load; Wherein, determining whether to control the vehicle's nose-up alarm device to be turned on and whether to control the rollover support mechanism to be turned on according to the front axle load and the rear axle load specifically includes the following steps: Determine the total axle load of the vehicle according to the front axle load and the rear axle load; Determining a ratio of the front axle load to the total axle load; determining whether to control a nose-up alarm device of the vehicle to be turned on and whether to control the rollover support mechanism to be turned on according to the front axle load and the ratio; Wherein, determining whether to control the vehicle's nose-up alarm device to be turned on and whether to control the rollover support mechanism to be turned on according to the front axle load and the ratio specifically includes the following steps: If the front axle load is greater than or equal to a preset front axle load threshold, the ratio is less than or equal to a preset first ratio threshold, and the duration of the ratio is greater than a preset first duration, then the indicator light in the vehicle tilt alarm device is controlled to light up; Wherein, the determining whether to control the vehicle's nose-up alarm device to be turned on and whether to control the rollover support mechanism to be turned on according to the front axle load and the ratio further includes the following steps: If the front axle load is greater than or equal to the front axle load threshold, the ratio is less than or equal to a preset second ratio threshold, and the duration of the ratio is greater than a preset second duration, the indicator light is controlled to light up, and the alarm in the nose-up alarm device is controlled to sound; wherein the second ratio threshold is less than the first ratio threshold; Wherein, the determining whether to control the vehicle's nose-up alarm device to be turned on and whether to control the rollover support mechanism to be turned on according to the front axle load and the ratio further includes the following steps: If the front axle load is less than the front axle load threshold, the ratio is less than or equal to a preset third ratio threshold, and the duration of the ratio is greater than a preset third duration, the indicator light is controlled to light up, the alarm sounds, and the flip support mechanism is controlled to open to support the rear of the vehicle; Wherein, the third ratio threshold is less than the second ratio threshold; The indicator lights and the alarm are both arranged inside and outside the cab of the vehicle.

2. The method for preventing a dump truck from tilting according to claim 1, characterized in that: The following steps are also included: After the indicator light is on or the alarm sounds, if the ratio is greater than a preset fourth ratio threshold and the duration of the ratio is greater than a preset fourth duration, the indicator light or the alarm is controlled to be turned off; Wherein the fourth ratio threshold is greater than the first ratio threshold.

3. The method for preventing a dump truck from tilting according to claim 1, characterized in that: The following steps are also included: When the vehicle speed is lower than the preset speed and the holding time is longer than a fourth preset time, the flip support mechanism is controlled to be opened or closed according to the received flip support mechanism switch signal.

4. A system for preventing a dump truck from tilting, characterized in that: include: A nose-up warning device, which is used to be arranged inside and outside the vehicle cab; A flip support mechanism, which is used to be arranged at the rear of the vehicle and is used to support the rear of the vehicle when it is opened; A pressure sensor, which is used to obtain the front axle load and the rear axle load of the vehicle; An electronic control unit ECU, which is used to determine whether to control the vehicle's nose-up alarm device to be turned on and whether to control the rollover support mechanism to be turned on according to the front axle load and the rear axle load; Wherein, the ECU is also used for: Determine the total axle load of the vehicle according to the front axle load and the rear axle load; Determining a ratio of the front axle load to the total axle load; determining whether to control a nose-up alarm device of the vehicle to be turned on and whether to control the rollover support mechanism to be turned on according to the front axle load and the ratio; Wherein, the ECU is also used for: If the front axle load is greater than or equal to a preset front axle load threshold, the ratio is less than or equal to a preset first ratio threshold, and the duration of the ratio is greater than a preset first duration, then the indicator light in the vehicle tilt alarm device is controlled to light up; Wherein, the ECU is also used for: If the front axle load is greater than or equal to the front axle load threshold, the ratio is less than or equal to a preset second ratio threshold, and the duration of the ratio is greater than a preset second duration, the indicator light is controlled to light up, and the alarm in the nose-up alarm device is controlled to sound; wherein the second ratio threshold is less than the first ratio threshold; Wherein, the ECU is also used for: If the front axle load is less than the front axle load threshold, the ratio is less than or equal to a preset third ratio threshold, and the duration of the ratio is greater than a preset third duration, the indicator light is controlled to light up, the alarm sounds, and the flip support mechanism is controlled to open to support the rear of the vehicle; The third ratio threshold is smaller than the second ratio threshold.

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