Wide-body dump truck electronic braking system and control method

Abstract

The application discloses a wide-body dump truck electronic braking system and a control method, relates to the field of braking systems, and solves the technical problems that the existing wide-body dump truck air braking system has many components, a complex structure, is difficult to install and maintain, and has a complex control mode, a long debugging period, and is inconvenient to adapt to mine unmanned operation requirements. The system cancels air braking related components, adopts a pure electric braking architecture, is composed of core components such as a vehicle-mounted power supply, a mode selection switch, an electronic parking switch, an electronic foot valve and an electronic control module, is equipped with a power-off braking mode, can realize flexible switching between manual operation and unmanned automatic control, and has functions such as anti-lock, automatic obstacle braking and overspeed braking. The application has a compact structure, is convenient to install and maintain, has high braking safety and responsiveness, is suitable for modern mine automation and intelligent operation requirements, and effectively saves use and maintenance costs.

Description

Technical Field

[0001] This invention belongs to the field of braking system technology, and particularly relates to an electronic braking system and control method for a wide-body dump truck. Background Technology

[0002] Wide-body dump trucks are one of the core pieces of equipment in mining operations, widely used in the transportation of rock and ore in open-pit coal mines, iron mines, copper mines, and other mines. They can be used in conjunction with excavators, crushing plants, and other equipment. As modern mines develop towards automation and unmanned operation, higher functional and safety requirements are being placed on the braking systems of wide-body dump trucks used in mining.

[0003] Currently, wide-body dump trucks generally use air braking systems, which have several technical drawbacks: First, the air braking system has numerous and complex components such as pipes, valves, and pumps, making installation on the vehicle difficult. Furthermore, subsequent inspection and maintenance require checking the pipes and multiple related components, resulting in cumbersome and inefficient operations. Second, the automatic control method of the air braking system is complex and has a long debugging cycle, making it unsuitable for the remote electronic and automatic control requirements of unmanned mining operations. Third, the braking response of the air braking system is affected by air pressure transmission, resulting in a certain delay, and the braking safety and accuracy need to be improved.

[0004] Therefore, developing a wide-body dump truck braking system that is structurally simple, easy to install and maintain, and capable of combining manual and unmanned automatic control with reliable braking safety has become a key requirement for adapting to the development of modern smart mines. Summary of the Invention

[0005] To at least partially solve the technical problems existing in the prior art, the present invention provides an electronic braking system and control method for a wide-body dump truck.

[0006] The electronic braking system for wide-body dump trucks of the present invention includes an on-board power supply, a mode selection switch, an electronic parking switch, an electronic foot valve, an electronic control module, a signal receiver, a relay, a brake cylinder, a wheel speed sensor, a radar, a vision camera, and cables; The vehicle power supply includes a vehicle low-voltage power supply and a vehicle high-voltage power supply. The vehicle low-voltage power supply is electrically connected to and supplies power to the electronic control module through the cable. The vehicle high-voltage power supply is electrically connected to the brake cylinder through the relay. The mode selection switch, the electronic parking switch, the electronic foot valve, the signal receiver, the wheel speed sensor, the radar, and the vision camera are all connected to the electronic control module via signals. The relay is electrically connected to the electronic control module and receives its control signals. The system adopts a power-off braking mode, in which the vehicle is braked when the brake cylinder loses power and the vehicle is released when the brake cylinder is energized.

[0007] Furthermore, in the aforementioned electronic control system for wide-body dump trucks, the mode selection switch is used to switch between manual operation mode and automatic control mode, and the electronic control module matches the corresponding control program according to the model of the mode selection switch.

[0008] Furthermore, in the aforementioned wide-body dump truck electronic control system, the radar and the vision camera are used to collect signals of obstacles around the vehicle, and the wheel speed sensor is used to collect signals of the vehicle's driving speed. All of these signals are transmitted to the electronic control module in real time.

[0009] The control method of the wide-body dump truck electronic braking system of the present invention includes two modes: manual operation control and automatic control. The two modes are switched by a mode selection switch, and both modes integrate automatic safety braking function and anti-lock braking function. The manual operation mode is: Switch the mode selection switch to manual mode. The electronic control module will call the manual operation program to complete the system self-check. If there is no fault, it will enter the normal driving preparation state. If there is a fault, it will call the fault code to troubleshoot the fault and then power on the self-check again. Press the electronic parking switch, and the electronic control module sends a control signal to the relay to control the on-board high-voltage power supply to conduct to the brake cylinder. The brake cylinder is energized, the piston rod retracts, the vehicle is released from the brakes, and it can be driven normally. When the electronic parking switch is flipped or the electronic foot valve is pressed, the electronic control module sends a control signal to the relay. The relay controls the on-board high-voltage power supply to disconnect from the brake cylinder. The brake cylinder loses power, the piston rod extends, and the vehicle brakes. The automatic control mode is: Switch the mode selection switch to automatic mode. The electronic control module calls the automatic control program to complete the system self-check. If there is no fault, it enters the normal driving preparation state. If there is a fault, it calls the fault code to troubleshoot the fault and then re-powers on to perform a self-check. The electronic control module receives external remote control commands through a signal receiver and converts the commands into braking control signals, which are then sent to a relay. The relay controls the energization / de-energization of the brake cylinder by switching the circuit between the vehicle's high-voltage power supply and the brake cylinder, thereby enabling the vehicle to release or brake.

[0010] Furthermore, in the control method of the above-mentioned wide-body dump truck electronic braking system, the automatic safety braking function in manual operation mode and automatic control mode is specifically implemented as follows: the electronic control module receives the vehicle speed signal from the wheel speed sensor and the obstacle signal from the radar and vision camera in real time. When the vehicle speed exceeds the limit value or an obstacle is detected around the vehicle, the electronic control module automatically sends a control signal to the relay to de-energize the brake cylinder and complete the braking of the vehicle.

[0011] Furthermore, in the control method of the above-mentioned wide-body dump truck electronic braking system, the anti-lock braking function in manual operation mode and automatic control mode is specifically implemented as follows: the electronic control module dynamically adjusts the on / off state of the relay according to the vehicle speed signal collected in real time by the wheel speed sensor, controls the braking force of the brake cylinder, and realizes the anti-lock braking of the whole vehicle.

[0012] Furthermore, in the control method of the above-mentioned wide-body dump truck electronic braking system, the power failure braking mode of the system is the emergency braking mode. When the vehicle suddenly loses power, the circuit between the on-board high-voltage power supply and the brake cylinder is automatically disconnected, the brake cylinder loses power and realizes the vehicle braking, so that the vehicle is in the parking brake state.

[0013] Furthermore, in the control method of the above-mentioned wide-body dump truck electronic braking system, in manual operation mode, the electronic control module continuously receives signals from wheel speed sensors, radar, and vision cameras, and detects the vehicle's driving status and surrounding environment in real time. If the automatic safety braking conditions are triggered, the braking operation is immediately executed and the driver is alerted.

[0014] Furthermore, in the control method of the above-mentioned wide-body dump truck electronic braking system, in automatic control mode, the electronic control module continuously receives signals from wheel speed sensors, radar, and vision cameras, and detects the vehicle's driving status and surrounding environment in real time. If an obstacle is detected and it is determined that the vehicle cannot pass, the braking operation is automatically executed; if it is determined that the vehicle can pass, the vehicle continues to drive according to external remote control commands.

[0015] The electronic braking system and control method for wide-body dump trucks of the present invention have the following advantages and beneficial effects: This invention significantly reduces the difficulty of installation and layout on vehicles, and eliminates the need to check pipelines during subsequent maintenance, disassembly, and component replacement, thus significantly improving operational efficiency. The mode selection switch allows for flexible switching between manual and automatic control, providing essential technical support for the automation and intelligent development of modern mines. Employing a power-off braking mode, it also integrates overspeed automatic braking, obstacle automatic braking, and anti-lock braking functions, achieving multiple safety protections and significantly reducing safety risks in mine transportation operations. Furthermore, it reduces the labor and time costs of subsequent maintenance and repair, improving the overall operational efficiency of mine transportation. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for further understanding of the embodiments of the present invention and constitute a part of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings: Figure 1 This is a schematic diagram of the electronic braking system for the wide-body dump truck of the present invention; Figure 2 This is a schematic diagram of the electronic braking control principle for the wide-body dump truck of the present invention.

[0017] Explanation of reference numerals in the attached figures: 1: Vehicle low-voltage power supply; 2: Vehicle high-voltage power supply; 3: Mode selection switch; 4: Electronic parking switch; 5: Electronic foot valve; 6: Electronic control module; 7: Signal receiver; 8: Relay; 9: Brake cylinder; 10: Wheel speed sensor; 11: Radar; 12: Vision camera. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0019] like Figure 1 As shown, the wide-body dump truck electronic braking system of the present invention includes an on-board power supply, a mode selection switch 3, an electronic parking switch 4, an electronic foot valve 5, an electronic control module 6, a signal receiver 7, a relay 8, a brake cylinder 9, a wheel speed sensor 10, a radar 11, a vision camera 12, and cables. The vehicle power supply includes a low-voltage power supply 1 and a high-voltage power supply 2. The low-voltage power supply 1 is electrically connected to and supplies power to the electronic control module 6 via a cable, ensuring that the electronic control module 6 can receive signals, process them, and send commands. The high-voltage power supply 2 is electrically connected to the brake cylinder 9 via a relay 8. The circuit connection control with the brake cylinder 9 is achieved by switching the relay 8 on and off. The brake cylinder 9 is the braking actuator. When power is lost, the piston rod extends to achieve vehicle braking; when power is restored, the piston rod retracts to release the vehicle braking. It is the core actuator of the power-off braking mode of this invention. Mode selection switch 3, electronic parking switch 4, electronic foot valve 5, signal receiver 7, wheel speed sensor 10, radar 11, and vision camera 12 are all connected to the electronic control module 6. The signal receiver 7, connected to the electronic control module 6, receives external remote control commands in automatic control mode and transmits them to the electronic control module 6 for processing. The electronic parking switch 4 and electronic foot valve 5 are manual operation components in manual mode, respectively inputting commands for manual parking brake / release brake and manual service brake. The wheel speed sensor 10, radar 11, and vision camera 12 are vehicle status and environment acquisition components. The wheel speed sensor 10 collects vehicle speed signals in real time, providing data support for overspeed braking and anti-lock braking functions. The radar 11 and vision camera 12 collaboratively collect obstacle signals around the vehicle, providing environmental basis for automatic obstacle braking. The relay 8 is electrically connected to the electronic control module 6 and receives its control signals, accurately receiving these signals to quickly switch the circuit between the on-board high-voltage power supply 2 and the brake cylinder 9, thereby controlling the energization and de-energization of the brake cylinder 9. The system adopts a power-off braking mode. When the brake cylinder 9 loses power, the vehicle brakes. When the brake cylinder 9 is energized, the vehicle brakes are released. In the event of a sudden power failure, the vehicle can automatically enter the parking brake state, which greatly improves braking safety.

[0020] Furthermore, in the aforementioned electronic control system for wide-body dump trucks, the mode selection switch 3 is used to switch between manual operation mode and automatic control mode, and the electronic control module 6 matches the corresponding control program according to the model of the mode selection switch 3.

[0021] Furthermore, in the aforementioned wide-body dump truck electronic control system, radar 11 and vision camera 12 are used to collect signals of obstacles around the vehicle, and wheel speed sensor 10 is used to collect vehicle speed signals. All of these signals are transmitted to the electronic control module 6 in real time.

[0022] like Figure 2 As shown, the control method of the electronic braking system for the wide-body dump truck of the present invention includes two modes: manual operation control and automatic control. The two modes are switched by a mode selection switch, and both modes integrate automatic safety braking function and anti-lock braking function. The manual operation mode is: Switch the mode selection switch to manual mode. The electronic control module will call the manual operation program to complete the system self-check. If there is no fault, it will enter the normal driving preparation state. If there is a fault, it will call the fault code to troubleshoot the fault and then power on the self-check again. When the electronic parking switch is manually pressed, the electronic control module analyzes the signal and sends a conduction control signal to the relay. The relay controls the circuit between the vehicle's high-voltage power supply and the brake cylinder to conduct. The brake cylinder is energized, its piston rod retracts, the vehicle is released from braking, and the vehicle can be driven normally. When the electronic parking switch (parking brake) is manually flipped or the electronic foot valve (service brake) is pressed, the electronic control module analyzes the signal and sends a disconnection control signal to the relay. The relay controls the circuit between the vehicle's high-voltage power supply and the brake cylinder to disconnect. The brake cylinder loses power, its piston rod extends, and the vehicle brakes. Throughout the manual driving process, the electronic control module continuously receives signals from the wheel speed sensors, radar, and vision camera, and monitors the vehicle speed and surrounding environment in real time. If the vehicle speed exceeds the limit or an obstacle is detected, the automatic safety braking function is immediately triggered, controlling the brake cylinder to de-energize and achieve braking. At the same time, the electronic control module dynamically adjusts the on / off state of the relays based on the real-time vehicle speed signal from the wheel speed sensors, controlling the braking force of the brake cylinder to achieve anti-lock braking function. If the automatic safety braking is triggered, the system will also issue a warning to the driver. The automatic control mode is: Switch the mode selection switch to automatic mode. The electronic control module calls the automatic control program to complete the system self-check. If there is no fault, it enters the normal driving preparation state. If there is a fault, it calls the fault code to troubleshoot the fault and then re-powers on to perform a self-check. The braking / releasing command issued by the remote control terminal is received by the signal receiver via wireless transmission. The signal receiver transmits the command to the electronic control module. After the control module parses the command, it sends the corresponding on / off control signal to the relay. The relay controls the circuit between the vehicle's high-voltage power supply and the brake cylinder to realize the energization / de-energization of the brake cylinder, thereby completing the braking / releasing operation of the entire vehicle. Throughout the autonomous driving process, the electronic control module continuously receives signals from wheel speed sensors, radar, and vision cameras, and monitors vehicle speed and the surrounding environment in real time. If the vehicle speed exceeds the limit or an obstacle is detected, the automatic safety braking function is immediately triggered, automatically controlling the brake cylinders to de-energize and achieve braking. At the same time, based on the real-time vehicle speed signals from the wheel speed sensors, the braking force is dynamically adjusted to achieve anti-lock braking. If an obstacle is detected and it is determined that the vehicle cannot pass, the system maintains the braking state. If it is determined that the vehicle can pass, it continues to drive according to external remote control commands.

[0023] Furthermore, in the control method of the above-mentioned wide-body dump truck electronic braking system, the power failure braking mode of the system is the emergency braking mode. When the vehicle suddenly loses power, the circuit between the on-board high-voltage power supply and the brake cylinder is automatically disconnected, the brake cylinder loses power and realizes the vehicle braking, so that the vehicle is in the parking brake state.

[0024] It should be noted that, unless otherwise expressly specified and limited, the term "connection" or its synonyms should be interpreted broadly in this document. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. Furthermore, expressions such as "first" and "second" are merely used to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Meanwhile, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. In addition, the terms "front," "rear," "left," "right," "upper," and "lower" in this document refer to the placement states shown in the accompanying drawings.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electronic braking system for a wide-body dump truck, characterized in that, The wide-body dump truck electronic braking system includes an on-board power supply, a mode selection switch, an electronic parking switch, an electronic foot valve, an electronic control module, a signal receiver, a relay, a brake cylinder, a wheel speed sensor, radar, a vision camera, and cables. The vehicle power supply includes a vehicle low-voltage power supply and a vehicle high-voltage power supply. The vehicle low-voltage power supply is electrically connected to and supplies power to the electronic control module through the cable. The vehicle high-voltage power supply is electrically connected to the brake cylinder through the relay. The mode selection switch, the electronic parking switch, the electronic foot valve, the signal receiver, the wheel speed sensor, the radar, and the vision camera are all connected to the electronic control module via signals. The relay is electrically connected to the electronic control module and receives its control signals. The system adopts a power-off braking mode, in which the vehicle is braked when the brake cylinder loses power and the vehicle is released when the brake cylinder is energized.

2. The electronic braking system for wide-body dump trucks according to claim 1, characterized in that, The mode selection switch is used to switch between manual operation mode and automatic control mode, and the electronic control module matches the corresponding control program according to the model of the mode selection switch.

3. The electronic control system for wide-body dump trucks according to claim 1, characterized in that, The radar and the vision camera are used to collect signals of obstacles around the vehicle, and the wheel speed sensor is used to collect signals of the vehicle's speed. All of the above signals are transmitted to the electronic control module in real time.

4. A control method implemented using the electronic control system of a wide-body dump truck according to any one of claims 1 to 3, characterized in that, The control method of the electronic braking system of the wide-body dump truck includes two modes: manual operation control and automatic control. The two modes are switched by a mode selection switch, and both modes integrate automatic safety braking function and anti-lock braking function. The manual operation mode is: Switch the mode selection switch to manual mode. The electronic control module will call the manual operation program to complete the system self-check. If there is no fault, it will enter the normal driving preparation state. If there is a fault, it will call the fault code to troubleshoot the fault and then power on the self-check again. Press the electronic parking switch, and the electronic control module sends a control signal to the relay to control the on-board high-voltage power supply to conduct to the brake cylinder. The brake cylinder is energized, the piston rod retracts, the vehicle is released from the brakes, and it can be driven normally. When the electronic parking switch is flipped or the electronic foot valve is pressed, the electronic control module sends a control signal to the relay. The relay controls the on-board high-voltage power supply to disconnect from the brake cylinder. The brake cylinder loses power, the piston rod extends, and the vehicle brakes. The automatic control mode is: Switch the mode selection switch to automatic mode. The electronic control module calls the automatic control program to complete the system self-check. If there is no fault, it enters the normal driving preparation state. If there is a fault, it calls the fault code to troubleshoot the fault and then re-powers on to perform a self-check. The electronic control module receives external remote control commands through a signal receiver and converts the commands into braking control signals, which are then sent to a relay. The relay controls the energization / de-energization of the brake cylinder by switching the circuit between the vehicle's high-voltage power supply and the brake cylinder, thereby enabling the vehicle to release or brake.

5. The control method for the electronic braking system of the wide-body dump truck according to claim 4, characterized in that, The automatic safety braking function in both manual and automatic control modes is implemented as follows: the electronic control module receives vehicle speed signals from wheel speed sensors and obstacle signals from radar and vision cameras in real time. When the vehicle speed exceeds the limit or an obstacle is detected around the vehicle, the electronic control module automatically sends a control signal to the relay to de-energize the brake cylinder and complete the braking of the vehicle.

6. The control method for the electronic braking system of the wide-body dump truck according to claim 4, characterized in that, The anti-lock braking function in both manual and automatic operation modes is implemented as follows: the electronic control module dynamically adjusts the on / off state of the relays based on the vehicle speed signal collected in real time by the wheel speed sensors, and controls the braking force of the brake cylinders to achieve anti-lock braking of the entire vehicle.

7. The control method for the electronic braking system of a wide-body dump truck according to claim 4, characterized in that, The system's power-off braking mode is an emergency braking mode. When the vehicle experiences a sudden power outage, the circuit between the on-board high-voltage power supply and the brake cylinder is automatically disconnected, and the brake cylinder loses power to achieve vehicle braking, putting the vehicle in a parking brake state.

8. The control method for the electronic braking system of the wide-body dump truck according to claim 4, characterized in that, In manual operation mode, the electronic control module continuously receives signals from wheel speed sensors, radar, and vision cameras to monitor the vehicle's driving status and surrounding environment in real time. If the automatic safety braking conditions are triggered, the braking operation is immediately executed and the driver is alerted.

9. The control method for the electronic braking system of a wide-body dump truck according to claim 4, characterized in that, In automatic control mode, the electronic control module continuously receives signals from wheel speed sensors, radar, and vision cameras to monitor the vehicle's driving status and surrounding environment in real time. If an obstacle is detected and it is determined that the vehicle cannot pass, the braking operation is automatically executed; if it is determined that the vehicle can pass, the vehicle continues to drive according to external remote control commands.

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