A method and system for controlling the lifting of a vehicle cargo box to prevent rollover

Abstract

The application discloses a kind of vehicle cargo box lifting anti-tipping control method and system, its method includes: in response to the vehicle cargo box lifting pre-start, obtain vehicle body inclination angle;In response to the vehicle body inclination angle does not exceed preset inclination angle safety range, then the vehicle cargo box lifting starts;In response to the vehicle cargo box lifting start, obtain vehicle wheel tire pressure and vehicle wheel tire temperature;According to the vehicle wheel tire pressure and the vehicle wheel tire temperature table acquisition vehicle wheel load;In response to the vehicle wheel load does not exceed preset load safety threshold, then the vehicle cargo box lifting continues, until reaching maximum lifting angle and locking;According to the vehicle wheel load, the reduction amount of the weight of goods in the vehicle cargo box is calculated;In response to the reduction amount exceeds preset reduction amount threshold, then the vehicle cargo box lifting ends and falls back;The application can improve its cargo box lifting efficiency and safety.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery technology, and in particular to a method and system for controlling the lifting and anti-tipping of a vehicle-mounted cargo box. Background Technology

[0002] Dump trucks, as special-purpose vehicles, are mainly used for cargo transportation. Their lifting mechanism works by the engine driving a hydraulic pump through a transmission and power take-off to generate hydraulic pressure. This hydraulic pressure is then transmitted to the lifting rod, performing work and thus enabling automatic unloading. The rationality of the mechanical structure, the accuracy of lifting speed, angle, and displacement control are all important parameters for evaluating the performance of the lifting mechanism.

[0003] Currently, most dump truck lifting mechanisms use traditional control methods, with hydraulic lifting systems controlling the raising and lowering of the cargo box via pneumatic valves. Common problems during unloading include errors in lifting control, excessive road slope, incomplete unloading, improperly opened cargo doors, and excessive lifting speed, causing the dump truck's center of gravity to shift rearward, resulting in a tipping-over accident where the front wheels lift off the ground. Once a tipping-over accident occurs, it poses a significant threat to the lives of the dump truck driver, passengers, and surrounding personnel, resulting in substantial economic losses and personal injury. Therefore, ensuring the safety and stability of the lifting mechanism has become an urgent issue that needs to be addressed. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a method and system for controlling the lifting and anti-tipping of a vehicle-mounted cargo box, thereby solving the technical problem that the lifting mechanisms of dump trucks currently mostly adopt traditional control methods, which pose safety hazards.

[0005] To achieve the above objectives, the present invention is implemented using the following technical solution:

[0006] In a first aspect, the present invention provides a method for controlling the lifting and anti-tipping of a vehicle-mounted cargo box, comprising:

[0007] In response to the pre-start of the vehicle cargo box lifting, the vehicle tilt angle is obtained;

[0008] If the vehicle body tilt angle does not exceed the preset tilt angle safety range, the on-board cargo box lifting is initiated.

[0009] In response to the lifting and starting of the vehicle cargo box, the vehicle tire pressure and vehicle tire temperature are acquired;

[0010] The wheel load is obtained by referring to a table based on the vehicle tire pressure and the vehicle tire temperature.

[0011] In response to the fact that the wheel load does not exceed the preset load safety threshold, the on-board cargo box continues to lift until it reaches the maximum lifting angle and locks.

[0012] Calculate the reduction in the weight of the cargo in the vehicle cargo box based on the wheel load;

[0013] In response to the reduction exceeding a preset reduction threshold, the lifting of the vehicle cargo box ends and it falls back down.

[0014] Optionally, in response to the vehicle body tilt angle exceeding a preset tilt angle safety range, the pre-start of the vehicle cargo box lifting is terminated.

[0015] Optionally, in response to the wheel load exceeding a preset load safety threshold, the lifting of the vehicle cargo box stops.

[0016] Optionally, in response to the reduction amount not exceeding a preset reduction amount threshold, the locking continues until a preset duration is reached, at which point the lifting of the vehicle cargo box ends and it falls back down.

[0017] Optionally, the vehicle body tilt angle includes the front and rear tilt angles and the left and right tilt angles, and the tilt angle safety range includes the front and rear tilt angle safety range and the left and right tilt angle safety range.

[0018] Secondly, the present invention provides a vehicle-mounted cargo box lifting anti-tipping control device, comprising:

[0019] The tilt angle detection module is used to obtain the vehicle tilt angle in response to the pre-start of the lifting of the vehicle cargo box;

[0020] The lifting and starting module is used to lift and start the on-board cargo box in response to the vehicle body tilt angle not exceeding the preset tilt angle safety range;

[0021] The wheel detection module is used to obtain the tire pressure and tire temperature in response to the lifting start of the vehicle cargo box;

[0022] The load acquisition module is used to obtain the wheel load by looking up a table based on the vehicle tire pressure and the vehicle tire temperature.

[0023] The lifting locking module is used to respond to the fact that the wheel load does not exceed the preset load safety threshold, so that the on-board cargo box continues to be lifted until the maximum lifting angle is reached and then locked.

[0024] The cargo weight reduction module is used to calculate the reduction in the weight of the cargo in the vehicle cargo box based on the wheel load.

[0025] The termination reset module is used to respond to the reduction amount exceeding a preset reduction amount threshold, in which case the lifting of the vehicle cargo box ends and it falls back down.

[0026] Optional,

[0027] If the vehicle body tilt angle exceeds the preset tilt angle safety range, the pre-start of the on-board cargo box lifting will be terminated.

[0028] In response to the wheel load exceeding a preset load safety threshold, the lifting of the vehicle cargo box stops;

[0029] If the reduction amount does not exceed a preset reduction amount threshold, the lockout continues until the reduction amount exceeds the preset reduction amount threshold.

[0030] Thirdly, the present invention provides a vehicle-mounted cargo box lifting anti-tipping control system, comprising:

[0031] Frame;

[0032] A cargo box, the rear end of which is hinged to the rear end of the vehicle frame;

[0033] A lifting component, one end of which is hinged to the front end of the cargo box and the other end of which is hinged to the front end of the vehicle frame;

[0034] Wheels, with multiple wheels distributed and disposed on the vehicle frame;

[0035] A temperature and pressure assembly, comprising a tire temperature sensor and a tire pressure sensor, wherein multiple temperature and pressure assemblies are respectively disposed on the wheel;

[0036] The tilt assembly includes a first tilt sensor and a second tilt sensor, the first tilt sensor and the second tilt sensor are horizontally disposed on the vehicle frame, and the direction of the first tilt sensor is the same as the vehicle's forward direction, and the direction of the second tilt sensor is perpendicular to the vehicle's forward direction;

[0037] The control unit is electrically connected to the lifting component, the temperature and pressure component, and the tilting component. The control unit is controlled using the vehicle-mounted cargo box lifting anti-tipping control method described above.

[0038] Optionally, the lifting component is a lifting cylinder, and a hydraulic control system is connected to the lifting cylinder, the hydraulic control system being electrically connected to the control unit.

[0039] Optionally, the control unit may employ a microcontroller or a DSP processor.

[0040] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0041] This invention provides a method and system for preventing tipping over of a vehicle-mounted cargo box. By measuring the vehicle's tilt angle when the cargo box is lifted, it determines whether the current operating state is dangerous. Based on acquired tire pressure and temperature information, it calculates the initial tire load-bearing capacity. The system adaptively controls the lifting speed of the lifting cylinders and determines whether the tire load-bearing capacity is at a critical point for vehicle tipping. If it is close to this critical point, the control unit stops the cargo box lifting system, achieving adaptive control and improving both lifting efficiency and safety. This invention can be widely applied to dump trucks. Attached Figure Description

[0042] Figure 1 This is a flowchart illustrating the vehicle-mounted cargo box lifting anti-tipping control method provided in an embodiment of the present invention;

[0043] Figure 2 This is a schematic diagram of the structure of the vehicle-mounted cargo box lifting anti-tipping control device provided in an embodiment of the present invention;

[0044] Figure 3 This is a schematic diagram of the structure of the vehicle-mounted cargo box lifting and anti-tipping control system provided in an embodiment of the present invention;

[0045] The diagram is marked as follows:

[0046] 1-Chassis; 2-Cargo box; 3-Lifting components; 4-Tilt assembly; 5-Wheels. Detailed Implementation

[0047] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0048] Example 1:

[0049] like Figure 1 As shown, this embodiment of the invention provides a method for controlling the lifting and anti-tipping of a vehicle-mounted cargo box, including the following steps:

[0050] Step S1: In response to the pre-start of the vehicle cargo box lifting, obtain the vehicle body tilt angle;

[0051] The vehicle body tilt angle includes the front and rear tilt angles and the left and right tilt angles, and the tilt angle safety range includes the front and rear tilt angle safety range and the left and right tilt angle safety range.

[0052] Specifically, in this embodiment, the safe range for the front and rear roll angles of the vehicle body is set to 0-10°, and the safe range for the left and right roll angles of the vehicle body is set to 0-5°. In other optional embodiments, the safe ranges can be set as needed.

[0053] Step S2: If the vehicle body tilt angle does not exceed the preset tilt angle safety range, the lifting of the vehicle cargo box is initiated; if the vehicle body tilt angle exceeds the preset tilt angle safety range, the pre-start of the lifting of the vehicle cargo box is terminated.

[0054] Step S3: In response to the lifting start of the vehicle cargo box, obtain the vehicle tire pressure and vehicle tire temperature.

[0055] Step S4: Obtain the wheel load by referring to the table based on the vehicle tire pressure and the vehicle tire temperature;

[0056] Specifically, in this embodiment, the tire pressure, tire temperature, and wheel load are pre-calibrated through experiments, a calibration table is generated and stored, and the table can be retrieved for reference when needed.

[0057] Step S5: In response to the wheel load not exceeding the preset load safety threshold, the lifting of the vehicle cargo box continues until the maximum lifting angle is reached and locked; in response to the wheel load exceeding the preset load safety threshold, the lifting of the vehicle cargo box stops.

[0058] Specifically, in this embodiment, the load safety threshold is set to 110% of the tire load capacity threshold. In other optional embodiments, the tire load capacity threshold can be set as needed.

[0059] Since a vehicle has more than one wheel, in this specific embodiment, it is required that the wheel load of all wheels does not exceed a preset load safety threshold. In other optional embodiments, the number of wheels that do not exceed the preset load safety threshold can be set as needed.

[0060] Step S6: Calculate the reduction in the weight of the cargo in the vehicle cargo box based on the wheel load;

[0061] Specifically, in this embodiment, the reduction amount is set to 95%. In other optional embodiments, the reduction amount can be set as needed.

[0062] Step S7: In response to the reduction amount exceeding a preset reduction amount threshold, the lifting of the vehicle cargo box ends and it falls back down.

[0063] If the reduction amount does not exceed a preset reduction amount threshold, the locking continues until a preset duration is reached, at which point the lifting of the vehicle cargo box ends and it falls back down.

[0064] In this embodiment, the preset duration is set to 10 seconds. In other optional embodiments, the preset duration can be set as needed.

[0065] Example 2:

[0066] like Figure 2As shown, the present invention provides a vehicle-mounted cargo box lifting anti-tipping control device, comprising:

[0067] The tilt angle detection module is used to obtain the vehicle tilt angle in response to the pre-start of the lifting of the vehicle cargo box;

[0068] The lifting start module is used to initiate the lifting of the on-board cargo box in response to the vehicle body tilt angle not exceeding the preset tilt angle safety range; and to terminate the pre-start of the lifting of the on-board cargo box in response to the vehicle body tilt angle exceeding the preset tilt angle safety range.

[0069] The wheel detection module is used to obtain the tire pressure and tire temperature in response to the lifting start of the vehicle cargo box;

[0070] The load acquisition module is used to obtain the wheel load by looking up a table based on the vehicle tire pressure and the vehicle tire temperature.

[0071] The lifting locking module is used to respond to the following: if the wheel load does not exceed a preset load safety threshold, the lifting of the vehicle cargo box continues until the maximum lifting angle is reached and then locked; if the wheel load exceeds the preset load safety threshold, the lifting of the vehicle cargo box stops.

[0072] The cargo weight reduction module is used to calculate the reduction in the weight of the cargo in the vehicle cargo box based on the wheel load.

[0073] The end reset module is used to respond to the reduction amount exceeding a preset reduction amount threshold, in which case the lifting of the vehicle cargo box ends and it falls back; in response to the reduction amount not exceeding the preset reduction amount threshold, the locking continues until the reduction amount exceeds the preset reduction amount threshold.

[0074] Example 3:

[0075] This invention provides a vehicle-mounted cargo box lifting anti-tipping control system, including a frame 1, a cargo box 2, a lifting component 3, wheels 5, a temperature and pressure component, a tilting component 4, and a control unit. The rear end of the cargo box 2 is hinged to the rear end of the frame 1. One end of the lifting component 3 is hinged to the front end of the cargo box 2, and the other end is hinged to the front end of the frame 1. Multiple wheels 5 are distributed on the frame 1. The temperature and pressure component includes tire temperature sensors and tire pressure sensors, and multiple temperature and pressure components are correspondingly arranged on the wheels 5. The tilting component 4 includes a first tilting sensor and a second tilting sensor. The first tilting sensor and the second tilting sensor are horizontally arranged on the frame 1, and the direction of the first tilting sensor is the same as the vehicle's forward direction, used to measure the front and rear tilting angles of the vehicle body. The direction of the second tilting sensor is perpendicular to the vehicle's forward direction, used to measure the left and right tilting angles of the vehicle body. The control unit is electrically connected to the lifting component 3, the temperature and pressure component, and the tilting component 4. The control unit is controlled by the vehicle-mounted cargo box lifting anti-tipping control method described in Embodiment 1 above.

[0076] The lifting component 3 is a lifting cylinder, and a hydraulic control system is connected to the lifting cylinder. The hydraulic control system is electrically connected to the control unit. The control unit uses a microcontroller or a DSP processor.

[0077] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0078] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0079] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0080] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0081] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for controlling the lifting and anti-tipping of a vehicle-mounted cargo box, characterized in that, include: In response to the pre-start of the vehicle cargo box lifting, the vehicle tilt angle is obtained; If the vehicle body tilt angle does not exceed the preset tilt angle safety range, the on-board cargo box lifting is initiated. In response to the lifting and starting of the vehicle cargo box, the vehicle tire pressure and vehicle tire temperature are acquired; The wheel load is obtained by referring to a table based on the vehicle tire pressure and the vehicle tire temperature. In response to the fact that the wheel load does not exceed the preset load safety threshold, the on-board cargo box continues to lift until it reaches the maximum lifting angle and locks. Calculate the reduction in the weight of the cargo in the vehicle cargo box based on the wheel load; In response to the reduction exceeding a preset reduction threshold, the lifting of the vehicle cargo box ends and it falls back down.

2. The vehicle-mounted cargo box lifting anti-tipping control method according to claim 1, characterized in that, If the vehicle body tilt angle exceeds the preset tilt angle safety range, the pre-start of the on-board cargo box lifting will be terminated.

3. The vehicle-mounted cargo box lifting anti-tipping control method according to claim 1, characterized in that, In response to the wheel load exceeding a preset load safety threshold, the lifting of the vehicle cargo box stops.

4. The vehicle-mounted cargo box lifting anti-tipping control method according to claim 1, characterized in that, If the reduction amount does not exceed a preset reduction amount threshold, the locking continues until a preset duration is reached, at which point the lifting of the vehicle cargo box ends and it falls back down.

5. The vehicle-mounted cargo box lifting anti-tipping control method according to claim 1, characterized in that, The vehicle body tilt angle includes the front and rear tilt angles and the left and right tilt angles, and the tilt angle safety range includes the front and rear tilt angle safety range and the left and right tilt angle safety range.

6. A vehicle-mounted cargo box lifting anti-tipping control device, characterized in that, include: The tilt angle detection module is used to obtain the vehicle tilt angle in response to the pre-start of the lifting of the vehicle cargo box; The lifting and starting module is used to lift and start the on-board cargo box in response to the vehicle body tilt angle not exceeding the preset tilt angle safety range; The wheel detection module is used to obtain the tire pressure and tire temperature in response to the lifting start of the vehicle cargo box; The load acquisition module is used to obtain the wheel load by looking up a table based on the vehicle tire pressure and the vehicle tire temperature. The lifting locking module is used to respond to the fact that the wheel load does not exceed the preset load safety threshold, so that the on-board cargo box continues to be lifted until the maximum lifting angle is reached and then locked. The cargo weight reduction module is used to calculate the reduction in the weight of the cargo in the vehicle cargo box based on the wheel load. The termination reset module is used to respond to the reduction amount exceeding a preset reduction amount threshold, in which case the lifting of the vehicle cargo box ends and it falls back down.

7. The vehicle-mounted cargo box lifting anti-tipping control device according to claim 6, characterized in that, If the vehicle body tilt angle exceeds the preset tilt angle safety range, the pre-start of the on-board cargo box lifting will be terminated. In response to the wheel load exceeding a preset load safety threshold, the lifting of the vehicle cargo box stops; If the reduction amount does not exceed a preset reduction amount threshold, the lockout continues until the reduction amount exceeds the preset reduction amount threshold.

8. A vehicle-mounted cargo box lifting and anti-tipping control system, characterized in that, include: Frame; A cargo box, the rear end of which is hinged to the rear end of the vehicle frame; A lifting component, one end of which is hinged to the front end of the cargo box and the other end of which is hinged to the front end of the vehicle frame; Wheels, with multiple wheels distributed and disposed on the vehicle frame; A temperature and pressure assembly, comprising a tire temperature sensor and a tire pressure sensor, wherein multiple temperature and pressure assemblies are respectively disposed on the wheel; The tilt assembly includes a first tilt sensor and a second tilt sensor, which are horizontally mounted on the vehicle frame. The direction of the first tilt sensor is the same as the vehicle's forward direction, and the direction of the second tilt sensor is perpendicular to the vehicle's forward direction. The control unit is electrically connected to the lifting component, the temperature and pressure component, and the tilting component, and the control unit is controlled by the vehicle cargo box lifting anti-tipping control method as described in any one of claims 1-5.

9. The vehicle-mounted cargo box lifting and anti-tipping control system according to claim 8, characterized in that, The lifting device is a lifting cylinder, and a hydraulic control system is connected to the lifting cylinder. The hydraulic control system is electrically connected to the control unit.

10. The vehicle-mounted cargo box lifting and anti-tipping control system according to claim 8, characterized in that, The control unit uses a single-chip microcomputer processor or a DSP processor.

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