Truck brake pad cooling system and method suitable for long downhill road section

Abstract

The invention relates to the technical field of road traffic facilities, in particular to a truck brake pad cooling system and method suitable for a long downhill road section, and discloses a truck brake pad cooling system and method suitable for the long downhill road section. The invention aims to solve the problems that an existing cooling road section lacks intelligent monitoring and control functions, data such as brake pad temperature and tire temperature of a vehicle cannot be monitored in real time, vehicles needing to be cooled and vehicles not needing to be cooled cannot be accurately distributed, all the vehicles enter a cooling pool at the same time, road section congestion is caused, and the service life of the road section is prolonged. And a large amount of delay is generated. The system comprises a detection device used for detecting vehicle mass and vehicle tire temperature; the control device is used for receiving information of the detection device and sending a warning instruction to the shunting warning device when heavy load or high temperature is detected; the shunting warning device is used for flickering a warning lamp; the photoelectric warning sign is used for warning drivers to pay attention to shunting; and the cooling pool is used for cooling the brake pad of the long downhill vehicle.

Description

Technical Field

[0001] The present invention relates to the technical field of road traffic facilities, and particularly to a cooling system and a cooling method for truck brake pads applicable to long downhill sections. Background Art

[0002] According to statistics, there are currently 1,026 dangerous long downhill roads in China with a relatively large average longitudinal slope and a continuous slope length exceeding the limit value, with a total mileage of 8,852 kilometers. More than 24,000 road traffic accidents have occurred cumulatively, and most of these accidents are mainly caused by trucks. In order to reduce such traffic accidents, relevant facilities such as cooling pools and cooling lanes are currently set up on some long downhill sections, such as Baofu Expressway and Zhangzhuo Expressway.

[0003] According to statistics, after the cooling pool in Fupingxi Parking Area was put into use, the accident rate decreased by 90%. After setting up facilities such as cooling pools on the Lvliang section of Shanxi Qingyin Expressway, the proportion of medium-risk sections was controlled within 8.8%, and the number of traffic accidents decreased by 56.3%. Although some achievements have been made by setting up relevant cooling facilities, most of the cooling sections lack intelligent monitoring and control functions and cannot real-time monitor data such as the temperature of vehicle brake pads and tires. There is also a lack of an orderly organization and system, and it is unable to accurately divert vehicles that need to be cooled from those that do not, often causing all vehicles to enter the cooling pool simultaneously, resulting in road congestion and a large number of delays. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems that existing cooling sections lack intelligent monitoring and control functions, cannot real-time monitor data such as the temperature of vehicle brake pads and tires, are unable to accurately divert vehicles that need to be cooled from those that do not, often causing all vehicles to enter the cooling pool simultaneously, resulting in road congestion and a large number of delays, and to propose a cooling system and a cooling method for truck brake pads applicable to long downhill sections.

[0005] A cooling system for truck brake pads applicable to long downhill sections includes:

[0006] A detection device 1, a control device 2, a diversion warning device 3, a power supply device 4, an optoelectronic warning sign 5, and a cooling pool 6;

[0007] The detection device 1 is set up on the road surface of the detection section and includes a pressure detection module and a temperature detection module for detecting vehicle mass and vehicle tire temperature;

[0008] The control device 2 is separately set outside the road, used for receiving the vehicle detection information transmitted by the detection device 1, and sending a warning instruction to the diversion warning device 3 when detecting overload or high temperature;

[0009] The overload or high temperature means that the mass of the vehicle is greater than the maximum limit of the vehicle mass or the tire temperature of the vehicle is greater than the maximum limit of the tire temperature;

[0010] The shunt warning device 3 includes n groups of pressure-resistant warning light modules laid in the middle of the road in the detection section, which are used to flash warning lights after receiving the overload or high temperature command to prompt vehicle shunt;

[0011] The optoelectronic warning sign 5 is set at the starting position of the shunt lane in the detection section to warn the driver to pay attention to shunt;

[0012] The power supply device 4 is set in the isolation belt between the main road and the detection section and is used to supply power to the detection device 1, the control device 2, the shunt warning device 3 and the optoelectronic warning sign 5;

[0013] The cooling pool 6 is set in the shunt lane and is used to cool the brake pads of long downhill vehicles.

[0014] Preferably, each group of the n groups of pressure-resistant warning light modules includes: a glass 7, a series lamp group 8 and a steel base 9;

[0015] The steel base 9 is in a "concave" shape, the series lamp group 8 is set in the groove, and the glass 7 is used to seal the top;

[0016] The series lamp group 8 is a red light tube, which is set with a fixed flashing frequency and flashing duration to warn the vehicles that need to be shunted.

[0017] Preferably, the optoelectronic warning sign 5 is set on the off-road support rod 10 at the starting position of the shunt lane in the detection section, and is in a dormant state during the day and the sign is always on at night.

[0018] Preferably, the power supply device 4 includes a solar panel 11 and a storage battery 12.

[0019] Preferably, the cooling pool 6 includes a transition section 13 and a basic section 14 and is used to cool the brake pads of the vehicle.

[0020] A method for cooling the brake pads of trucks applicable to long downhill sections has the following specific process:

[0021] Step 1: The vehicle driving on the main road enters the detection section, and the detection device 1 on the detection section detects the mass and tire temperature of the vehicle;

[0022] The control device 2 receives the mass and tire temperature of the vehicle detected by the detection device 1;

[0023] If the mass of the vehicle is less than or equal to the maximum limit of the vehicle mass and the tire temperature of the vehicle is less than or equal to the maximum limit of the tire temperature, the control device 2 controls the vehicle not to enter the shunt section, and the vehicle drives from the detection section to the main road;

[0024] If the mass of the vehicle is less than or equal to the maximum vehicle mass limit, but the tire temperature of the vehicle is greater than the maximum tire temperature limit, the control device 2 controls the diversion warning device 3 to flash the warning light to prompt the vehicle to divert, and step two is executed;

[0025] If the mass of the vehicle is greater than the maximum vehicle mass limit, but the tire temperature of the vehicle is less than or equal to the maximum tire temperature limit, the control device 2 controls the diversion warning device 3 to flash the warning light to prompt the vehicle to divert, and step two is executed;

[0026] If the mass of the vehicle is greater than the maximum vehicle mass limit and the tire temperature of the vehicle is greater than the maximum tire temperature limit, the control device 2 controls the diversion warning device 3 to flash the warning light to prompt the vehicle to divert, and step two is executed;

[0027] Step two: The vehicle drives into the diversion lane. A cooling pool 6 is arranged in the diversion lane, and the cooling pool 6 cools the vehicle brake pads.

[0028] Preferably, an optoelectronic warning sign 5 is arranged at the starting position of the diversion lane to warn the driver to pay attention to diversion.

[0029] Preferably, the diversion warning device 3 includes N groups of pressure-resistant warning light modules laid in the middle of the road in the detection section, which are used to flash the warning light after receiving the heavy load or high temperature instruction to prompt the vehicle to divert;

[0030] The heavy load or high temperature means that the mass of the vehicle is greater than the maximum vehicle mass limit or the tire temperature of the vehicle is greater than the maximum tire temperature limit;

[0031] The distance H between the first group of pressure-resistant warning light modules in the driving direction and the detection device 1 is related to the headway h and the length l of the vehicle in front in the following-following state, and satisfies H≤h - l;

[0032] The distance H + nS between the last group of pressure-resistant warning light modules in the driving direction and the detection device 1 satisfies: H + nS < vt + at 2 / 2 + d;

[0033] Wherein, v represents the vehicle speed, t represents the driver's reaction time, a represents the acceleration of the vehicle during braking, d represents the safety distance between the two vehicles after stopping, n represents the total number of pressure-resistant warning light modules, and S represents the distance between adjacent pressure-resistant warning light modules.

[0034] Preferably, the vehicle speed v takes the ramp speed limit v 限 ;

[0035] The acceleration a of the vehicle during braking is measured according to the actual situation;

[0036] The safety distance d between the two vehicles after parking takes the limit value of 0.

[0037] Preferably, the distance S between adjacent voltage-resistant warning light modules is S = v_limit × t_delay;

[0038] where v_limit is the road speed limit, and t 延 is the delay for the light group to turn on;

[0039] The delay t_delay for the light group to turn on is 1 - 2 s.

[0040] The beneficial effects of the present invention are as follows:

[0041] In view of the deficiencies of the above situation, the present invention provides a braking pad cooling system and a cooling method for trucks applicable to long downhill sections. By real-time monitoring the weight of the vehicle and the temperature of the braking pads and wheels, different warnings are sent to different drivers, and the vehicles are diverted into the cooling pool, improving the system efficiency and safety and avoiding unnecessary delays.

[0042] Detection function: The present invention can use a pressure detection sensor and an infrared temperature detection sensor to detect in real time the weight of the vehicle passing through the section, the temperature of the tires, and the temperature of the braking pads, and can effectively determine the vehicles that may have potential safety hazards and need to be cooled.

[0043] Warning function: When the detection device finds a vehicle with abnormal data, the warning device can be made to flash through the control device, which has a warning effect on the driver, and to a certain extent reminds the driver to pay attention to rest and avoid fatigue driving.

[0044] Diversion function: Through the diversion warning device and the optoelectronic warning sign, the vehicles with normal and abnormal data are diverted. The abnormal vehicles need to be diverted to the right and drive into the cooling lane, improving the road orderliness and avoiding unnecessary delays. Description of the Drawings

[0045] Figure 1 is a schematic structural diagram of a braking pad cooling system for trucks applicable to long downhill sections of the present invention;

[0046] Figure 2 is a diagram of the diversion warning device of the present invention. a is the front view, b is the top view, L1 is the length of the pressure-resistant glass and the series lamp group, L2 is the length of the steel base, L3 is the height of the steel base, L4 is the height of the pressure-resistant glass, L5 is the height of the series lamp group, L6 is the width of the steel base, and L7 is the width of the pressure-resistant glass and the series lamp group;

[0047] Figure 3 is a structural diagram of the optoelectronic warning sign of the present invention;

[0048] Figure 4 is a structural diagram of the power supply device of the present invention;

[0049] Figure 5 This is the cross-sectional view of the cooling pond of the present invention. L8 is the horizontal length of the descending and ascending gradual change sections, and L9 is the length of the basic section.

[0050] 1 is a detection device, 2 is a control device, 3 is a diversion warning device, 4 is a power supply device, 5 is a photoelectric warning sign, 6 is a cooling pond, 7 is a high-pressure resistant and highly transparent glass, 8 is a series lamp group, 9 is a steel base, 10 is a support rod, 11 is a solar panel, 12 is a storage battery, 13 is a gradual change section, and 14 is a basic section. Specific embodiments

[0051] Specific embodiment 1: A braking pad cooling system for trucks on long downhill sections in this embodiment includes:

[0052] A detection device 1, a control device 2, a diversion warning device 3, a power supply device 4, a photoelectric warning sign 5, and a cooling pond 6;

[0053] The detection device 1 is set on the road surface of the detection section, and includes a pressure detection module and a temperature detection module, and is used to detect the vehicle mass and the temperature of the vehicle tires;

[0054] The control device 2 is separately set outside the road, and is used to receive the vehicle detection information transmitted by the detection device 1, and send a warning instruction to the diversion warning device 3 when detecting heavy load or high temperature;

[0055] The heavy load or high temperature means that the vehicle mass is greater than the maximum limit value of the vehicle mass or the temperature of the vehicle tires is greater than the maximum limit value of the tire temperature;

[0056] The diversion warning device 3 includes n groups of voltage-resistant warning lamp modules laid in the center of the road in the detection section, and is used to flash the warning lamp after receiving the heavy load or high temperature instruction to prompt vehicle diversion;

[0057] The photoelectric warning sign 5 is set at the starting position of the diversion lane in the detection section to warn the driver to pay attention to diversion;

[0058] The power supply device 4 is set in the isolation belt between the main road and the detection section, and is used to supply power to the detection device 1, the control device 2, the diversion warning device 3, and the photoelectric warning sign 5;

[0059] The cooling pond 6 is set in the diversion lane, and is used to cool the braking pads of vehicles on long downhill sections to improve their driving safety.

[0060] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that each group of the n groups of voltage-resistant warning lamp modules includes: a high-pressure resistant and highly transparent glass 7, a series lamp group 8, and a steel base 9;

[0061] The steel base 9 is in a "concave" shape, with a series of lamps 8 arranged in the groove and capped with high-transparency compressive glass 7;

[0062] The series of lamps 8 are red light tubes, with a fixed flashing frequency and flashing duration to warn the vehicles that need to be diverted.

[0063] As Figure 2 shown.

[0064] Other steps and parameters are the same as those in the first specific implementation manner.

[0065] Specific implementation manner three: The difference between this implementation manner and the first or second specific implementation manner is that the photoelectric warning sign 5 is arranged on the right support rod 10 outside the road at the starting position of the diversion lane in the detection section, in a dormant state during the day and constantly lit at night. As Figure 3 shown.

[0066] Other steps and parameters are the same as those in the first or second specific implementation manner.

[0067] Specific implementation manner four: The difference between this implementation manner and one of the first to third specific implementation manners is that the power supply device 4 includes a solar panel 11 and a storage battery 12.

[0068] Independently set within the isolation belt between the main road and the detection section, used to supply power to the detection device, control device, diversion warning device, and photoelectric warning sign. As Figure 4 shown.

[0069] Other steps and parameters are the same as those in one of the first to third specific implementation manners.

[0070] Specific implementation manner five: The difference between this implementation manner and one of the first to fourth specific implementation manners is that the cooling pool 6 includes a transition section 13 and a basic section 14, used to cool the brake pads of long downhill heavy-duty vehicles. As Figure 5 shown.

[0071] Other steps and parameters are the same as those in one of the first to fourth specific implementation manners.

[0072] Specific implementation manner six: The specific process of a method for cooling the brake pads of trucks on long downhill sections in this implementation manner is as follows:

[0073] Step 1: The vehicles traveling on the main road enter the detection section, and the detection device 1 on the detection section detects the mass and tire temperature of the vehicles;

[0074] The control device 2 receives the mass and tire temperature of the vehicles detected by the detection device 1;

[0075] If the mass of the vehicle is less than or equal to the maximum vehicle mass limit, and the tire temperature of the vehicle is less than or equal to the maximum tire temperature limit, the control device 2 controls the vehicle not to enter the diversion section, and the vehicle travels from the detection section to the main road;

[0076] If the mass of the vehicle is less than or equal to the maximum vehicle mass limit, but the tire temperature of the vehicle is greater than the maximum tire temperature limit, the control device 2 controls the diversion warning device 3 to flash the warning light to prompt the vehicle to divert, and execute step two;

[0077] If the mass of the vehicle is greater than the maximum vehicle mass limit, but the tire temperature of the vehicle is less than or equal to the maximum tire temperature limit, the control device 2 controls the diversion warning device 3 to flash the warning light to prompt the vehicle to divert, and execute step two;

[0078] If the mass of the vehicle is greater than the maximum vehicle mass limit, and the tire temperature of the vehicle is greater than the maximum tire temperature limit, then the control device 2 controls the diversion warning device 3 to flash the warning light to prompt the vehicle to divert, and execute step two;

[0079] Step two: The vehicle drives into the diversion lane. A cooling pool 6 is arranged in the diversion lane. The cooling pool 6 cools the vehicle brake pads to improve its driving safety.

[0080] Specific implementation manner seven: The difference between this implementation manner and the sixth specific implementation manner is that an optoelectronic warning sign 5 is arranged at the starting position of the diversion lane to warn the driver to pay attention to diversion.

[0081] Other steps and parameters are the same as those in the sixth specific implementation manner.

[0082] Specific implementation manner eight: The difference between this implementation manner and the sixth or seventh specific implementation manner is that the diversion warning device 3 includes N groups of pressure-resistant warning light modules laid in the middle of the detection section road surface, which are used to flash the warning light after receiving the heavy load or high temperature instruction to prompt the vehicle to divert;

[0083] The heavy load or high temperature means that the mass of the vehicle is greater than the maximum vehicle mass limit or the tire temperature of the vehicle is greater than the maximum tire temperature limit;

[0084] The distance H between the first group of pressure-resistant warning light modules in the driving direction and the detection device 1 is related to the headway h and the length l of the preceding vehicle in the following state, and satisfies H≤h - l;

[0085] The distance H + nS between the last group of pressure-resistant warning light modules in the driving direction and the detection device 1 satisfies: H + nS < vt + at 2 / 2 + d;

[0086] Among them, v represents the vehicle speed, t represents the driver's reaction time, a represents the acceleration of the vehicle during braking, d represents the safety distance between two vehicles after stopping, n represents the total number of pressure-resistant warning light modules, and S represents the spacing between adjacent pressure-resistant warning light modules.

[0087] Other steps and parameters are the same as those in the sixth or seventh specific implementation manner.

[0088] Specific implementation manner nine: The difference between this implementation manner and one of the sixth to eighth specific implementation manners is that the vehicle speed v takes the ramp speed limit v 限 ;

[0089] The acceleration a of the vehicle during braking is measured according to the actual situation;

[0090] The safety distance d between two vehicles after stopping takes the limit value of 0.

[0091] Other steps and parameters are the same as those in one of the sixth to eighth specific implementation manners.

[0092] Specific implementation manner ten: The difference between this implementation manner and one of the sixth to ninth specific implementation manners is that the spacing S between adjacent pressure-resistant warning light modules = v_limit × t_delay;

[0093] Among them, v_limit is the road speed limit, and t_delay is the delay time when the lamp group lights up (system reaction time);

[0094] The delay time t_delay when the lamp group lights up is 1 - 2 s (greater than or equal to 1 s and less than or equal to 2 s).

[0095] Other steps and parameters are the same as those in one of the sixth to ninth specific implementation manners.

[0096] Example:

[0097] The road section is a single lane, and the lane width is 350 cm.

[0098] The length L1 of the pressure-resistant high-transparency glass 7 is 300 cm, the width L7 is 30 cm, and the height L4 is 10 cm.

[0099] The length L1 of the series-connected lamp group 8 is 300 cm, the width L7 is 30 cm, and the height L5 is 20 cm.

[0100] The length L2 of the steel base 9 is 350 cm, the width L6 is 50 cm, and the height L3 is 40 cm.

[0101] In the cooling lane section, the length L8 of the gradual change section entering the cooling pool is 12 m, and the slope i 1 is -2.5%, the length L9 of the basic section is 15 m, the length L8 of the gradual change section leaving the cooling pool is 12 m, and the slope i 2 is 2.5%.

[0102] The present invention has strong practicability, can improve the orderliness of the road, reduce unnecessary delays, and can also timely detect vehicles with potential safety hazards in the brake pads and take effective measures in time to reduce traffic accidents caused by braking and reduce the possible consumption of manpower and material resources.

[0103] Working principle:

[0104] The vehicle traveling on the main road enters the detection section, and the vehicle is detected by the pressure sensor and the temperature detection device in the detection section, and the measured information is transmitted to the control device. When the detection result of the pressure sensor or the temperature detection device exceeds the set standard limit, the control device issues an instruction to the warning device to make the series lamp group and the photoelectric warning sign flash, prompting the driver to divert and cool down. If the detected information is lower than the set standard limit, the warning device has no reaction, and the driver does not need to divert and can drive back to the main road.

[0105] The present invention can also have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and deformations according to the present invention, but these corresponding changes and deformations should all fall within the protection scope of the appended claims of the present invention.

Claims

1. A brake pad cooling system for trucks on long downhill sections, characterized by: The system comprises: A detection device (1), a control device (2), a diversion warning device (3), a power supply device (4), a photoelectric warning sign (5) and a cooling pool 6; The detection device (1) is set up on the road surface of the detection section, and comprises a pressure detection module and a temperature detection module, which are used to detect the vehicle mass and the vehicle tire temperature; The control device (2) is separately arranged outside the road and is used to receive vehicle detection information transmitted by the detection device (1) and send a warning instruction to the diversion warning device (3) when a heavy load or high temperature is detected; The heavy load or high temperature refers to that the mass of the vehicle is greater than the maximum limit of the vehicle mass or the tire temperature of the vehicle is greater than the maximum limit of the tire temperature; The diversion warning device (3) comprises n groups of pressure-resistant warning light modules laid in the middle of the detection section of the road, which are used to flash warning lights after receiving a heavy load or high temperature instruction to prompt vehicles to divert; The photoelectric warning sign (5) is arranged at the starting position of the diversion lane of the detection section to warn the driver to pay attention to the diversion; The power supply device (4) is arranged in the separation zone between the main road and the detection section, and is used to supply power to the detection device (1), the control device (2), the diversion warning device (3) and the photoelectric warning sign (5); The cooling pool (6) is arranged in the diversion lane and is used to cool the brake pads of downhill vehicles.

2. The brake pad cooling system for trucks on long downhill sections according to claim 1 is characterized by: Each of the n groups of pressure-resistant warning light modules comprises: glass (7), a series-connected light group (8) and a steel base (9); The steel base (9) is in the shape of a Chinese character "concave", a series lamp group (8) is arranged in the concave groove, and the top is sealed with glass (7); The series light group (8) is a red light tube, which is set with a fixed flashing frequency and flashing duration to warn vehicles that need to be diverted.

3. The brake pad cooling system for trucks on long downhill sections according to claim 2 is characterized in that: The photoelectric warning sign (5) is arranged on an off-road support pole (10) at the starting position of the diversion lane of the detection section, is in a dormant state during the day, and is always lit at night.

4. The brake pad cooling system for trucks on long downhill sections according to claim 3 is characterized by: The power supply device (4) comprises a solar panel (11) and a storage battery (12).

5. The brake pad cooling system for trucks on long downhill sections according to claim 4 is characterized in that: The cooling pool (6) comprises a gradual section (13) and a basic section (14), and is used to cool the brake pads of a vehicle.

6. A method for cooling a truck brake pad using the truck brake pad cooling system according to claim 1, characterized in that: The specific process of the method is: Step 1: A vehicle traveling on the main road enters a detection section, and a detection device (1) on the detection section detects the mass and tire temperature of the vehicle; The control device (2) receives the mass and tire temperature of the vehicle detected by the detection device (1); If the mass of the vehicle is less than or equal to the maximum limit of the vehicle mass, and the tire temperature of the vehicle is less than or equal to the maximum limit of the tire temperature, the control device (2) controls the vehicle to drive from the detection section to the main road without entering the diversion section; If the mass of the vehicle is less than or equal to the maximum limit of the vehicle mass, but the tire temperature of the vehicle is greater than the maximum limit of the tire temperature, the control device (2) controls the diversion warning device (3) to flash a warning light to prompt the vehicle to divert, and step 2 is executed; If the mass of the vehicle is greater than the maximum limit of the vehicle mass, but the tire temperature of the vehicle is less than or equal to the maximum limit of the tire temperature, the control device (2) controls the diversion warning device (3) to flash a warning light to prompt the vehicle to divert, and step 2 is executed; If the mass of the vehicle is greater than the maximum limit of the vehicle mass and the tire temperature of the vehicle is greater than the maximum limit of the tire temperature, the control device (2) controls the diversion warning device (3) to flash a warning light to prompt the vehicle to divert, and step 2 is executed; Step 2: The vehicle enters the diversion lane, and a cooling pool (6) is arranged in the diversion lane to cool the brake pads of the vehicle.

7. The method for cooling a truck brake pad using a cooling system according to claim 6, characterized in that: A photoelectric warning sign (5) is provided at the start position of the diversion lane to warn the driver to pay attention to the diversion.

8. The method for cooling a truck brake pad using a cooling system according to claim 7, characterized in that: The diversion warning device (3) comprises N groups of pressure-resistant warning light modules laid in the middle of the detection section of the road, which are used to flash warning lights after receiving a heavy load or high temperature instruction to prompt vehicles to divert; The heavy load or high temperature refers to that the mass of the vehicle is greater than the maximum limit of the vehicle mass or the tire temperature of the vehicle is greater than the maximum limit of the tire temperature; The distance H between the first group of pressure-resistant warning light modules and the detection device 1 in the driving direction is related to the headway h and the length l of the preceding vehicle in the following state, and satisfies H≤hl; The distance H+nS between the last set of withstand voltage warning light modules in the driving direction and the detection device 1 satisfies: H+nS<vt+at 2 / 2+d; Among them, v represents the vehicle speed, t represents the driver's reaction time, a represents the acceleration of the vehicle during braking, d represents the safe distance between the two vehicles after parking, n represents the total number of pressure-resistant warning light modules, and S represents the spacing between adjacent pressure-resistant warning light modules.

9. The method for cooling a truck brake pad using a cooling system according to claim 8, characterized in that: The vehicle speed v is the ramp speed limit v 限 ; The acceleration a of the vehicle during braking is measured according to actual conditions; The safety distance d between the two vehicles after parking takes a limit value of 0.

10. The method for cooling a truck brake pad using a cooling system according to claim 9, characterized in that: The spacing S between adjacent voltage-resistant warning light modules = vlimit × t 延 ; Among them, vlimit is the road speed limit, t 延 Delay the lighting of the light group; The light group lights up with a delay of 1 to 2 seconds.

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