Logistics vehicle guiding method and system for fixed area

Abstract

A logistics vehicle guiding method for a fixed area comprises the steps that traffic condition data of a target area are determined, and the traffic condition data comprise key positions and internal roads; planning a vehicle travel route based on the traffic condition data; determining an expected traffic load based on the logistics business data and the vehicle travel route, wherein the expected traffic load comprises a path load corresponding to the travel path and a node load corresponding to the travel node; generating a path defibering plan based on the path load and generating a node defibering plan based on the node load; fusing the path defibering plan and the node defibering plan to generate a guide defibering plan based on a time period; generating a vehicle guidance scheme based on the vehicle travel route and the guidance defiliation plan; and issuing the vehicle guiding scheme to the logistics vehicle, and guiding the logistics vehicle to move in the target area based on the vehicle guiding scheme. According to the invention, the logistics vehicles can be prevented from being congested in the fixed area, the logistics efficiency is improved, and the normal production is prevented from being interfered.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle guidance, and in particular to a method and system for guiding logistics vehicles in a fixed area. Background Art

[0002] In fixed areas such as factory areas, because materials need to be frequently transported in and out, a large number of logistics vehicles are required to frequently enter and exit. For some heavy industrial enterprises, the volume and weight of their materials and products are larger, so large logistics vehicles must be used, and the frequent entry and exit of large logistics vehicles can easily cause congestion. In particular, some logistics vehicles often rush to increase their own logistics speed, further aggravating the congestion. It is very difficult for these large logistics vehicles to relieve congestion, which seriously affects logistics efficiency. Summary of the invention

[0003] In order to address the deficiencies in the prior art, the present invention provides a logistics vehicle guidance method and system for a fixed area, which can avoid congestion of logistics vehicles in the fixed area, improve logistics efficiency, and avoid interference with normal production.

[0004] In order to achieve the above object, the specific scheme adopted by the present invention is: a logistics vehicle guidance method for a fixed area, comprising the following steps: Determine the traffic condition data of the target area, including key locations and internal roads; Planning a vehicle travel route based on traffic condition data, the vehicle travel route includes a travel path generated based on internal roads and travel nodes generated based on key locations, and the travel nodes are mapped on the travel path; Determine the expected traffic load based on the logistics business data and the vehicle travel route, the expected traffic load including the path load corresponding to the travel path and the node load corresponding to the travel node; Generate a path decongestion plan based on the path load and generate a node decongestion plan based on the node load; Integrate the path relief plan and the node relief plan to generate a guidance relief plan based on time periods; Generate a vehicle guidance plan based on the vehicle route and guidance and relief plan; The vehicle guidance plan is sent to the logistics vehicle, and the logistics vehicle is guided to move in the target area based on the vehicle guidance plan.

[0005] As a further optimization of the above-mentioned logistics vehicle guidance method for a fixed area: key locations include parking locations, loading locations, unloading locations, area exits and area entrances, and internal roads can connect at least two key locations in series; traffic condition data also includes extraterritorial extension data, and the extraterritorial extension data includes external roads, which can be connected to area exits or area entrances, and the external roads have a parking-related relationship with the parking locations.

[0006] As a further optimization of the above-mentioned logistics vehicle guidance method for a fixed area: a method for determining expected traffic load based on logistics business data and vehicle travel routes includes: Extract logistics vehicles and logistics tasks corresponding to the logistics vehicles from logistics business data; Assign a first-level weight to the vehicle route based on the logistics vehicle and logistics task; Based on the primary weight of the vehicle's travel route, secondary weights are assigned to travel nodes and travel paths; Based on the preset standard logistics period, the path load and node load are determined based on the secondary weights; Combine path loads and node loads into expected traffic loads.

[0007] As a further optimization of the above-mentioned logistics vehicle guidance method for a fixed area: a method for generating a path decongestion plan based on a path load and generating a node decongestion plan based on a node load includes: Determine an expansion ratio, and expand the standard logistics period based on the expansion ratio to obtain an extended logistics period; Preliminarily compressing the secondary weights of the travel nodes and travel paths based on the expansion ratio; The secondary weights are compressed again based on the size parameters of the logistics vehicles; When the secondary weight reaches the preset threshold, the path relief plan and node relief plan are determined.

[0008] As a further optimization of the above-mentioned logistics vehicle guidance method for a fixed area: the dynamic position of the logistics vehicle is obtained in real time during the movement of the logistics vehicle, and a direction guidance prompt is generated based on the dynamic position and the vehicle guidance plan, and then the direction guidance prompt is sent to the logistics vehicle.

[0009] As a further optimization of the above-mentioned method for guiding logistics vehicles in a fixed area: a method for obtaining the dynamic position of a logistics vehicle in real time during the movement of the logistics vehicle includes: During the movement of the logistics vehicle, at least two wireless communication connections are established with the logistics vehicle; Calculate the approximate location of the logistics vehicle based on the signal strength of the wireless communication connection; The approximate position is fitted with the travel path and the travel node, and the approximate position is corrected to obtain the dynamic position of the logistics vehicle.

[0010] A logistics vehicle guidance system for a fixed area, used to implement the above-mentioned logistics vehicle guidance method for a fixed area, the system comprising: A plurality of outbound indication devices are arranged in the parking position and correspond one to one with the parking spaces in the parking position, and the outbound indication devices include a first display screen embedded in the ground; A plurality of positioning and pointing devices are arranged on the travel path or the travel node, and the positioning and pointing devices include a support pole vertically arranged on the ground, a second display screen for indicating direction is fixedly arranged on the upper part of the support pole, and a wireless access module is fixedly arranged on the top of the support pole, and the logistics vehicle can establish a communication connection with the wireless access module during the travel process.

[0011] As a further optimization of the above-mentioned logistics vehicle guidance system for a fixed area: the outbound indication device is arranged correspondingly on the left side of the parking space and close to the exit of the parking space, the outbound indication device also includes a shell embedded in the ground, the first display screen is fixedly set in the shell, and the top of the shell is closed by a transparent protective cover arranged at an angle.

[0012] As a further optimization of the above-mentioned logistics vehicle guidance system for a fixed area: the edge of the transparent protective cover is fixedly connected to the ground through a protective ring, and a plurality of heat conducting plates are also arranged in the shell, which pass downward through the shell and are inserted into the ground.

[0013] As a further optimization of the above-mentioned logistics vehicle guidance system for a fixed area: the positioning and pointing device also includes a base, the support rod is vertically fixed on the base, the top of the support rod is fixedly connected to a rain shield, the wireless access module is located below the rain shield, and a speaker fixedly connected to the support rod is arranged on the side of the wireless access module.

[0014] Beneficial effects: The present invention determines the vehicle route based on the actual conditions of key locations and internal roads in the target area, and determines the load of each travel path and travel node in combination with logistics business data, judges whether congestion may occur, and then generates node relief plans and path relief plans by optimizing standard logistics time periods when congestion may occur, and finally forms a vehicle guidance plan to ensure that within a time period, there will not be too many logistics vehicles passing through the travel path or travel nodes, thereby fully avoiding congestion, affecting the transportation of materials and goods and normal production, and is conducive to improving logistics efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1is a flow chart of the method of the present invention; Figure 2 It is a schematic diagram of key locations in the target area; Figure 3 It is a schematic diagram of the setting method of the outbound indication device; Figure 4 It is a structural schematic diagram of a warehouse-out indicating device; Figure 5 It is a structural schematic diagram of a positioning and pointing device.

[0016] Description of the drawings: 1-target area, 2-area entrance, 3-area exit, 4-loading position, 5-unloading position, 6-parking position, 7-external road, 8-parking space, 9-depot indication device, 10-positioning pointing device, 11-ground, 12-shell, 13-first display screen, 14-transparent protective cover, 15-display driver, 16-heat conduction plate, 17-protective ring, 18-base, 19-support rod, 20-second display screen, 21-rain shield, 22-speaker, 23-wireless access module. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] like Figure 1 As shown, a logistics vehicle guiding method for a fixed area includes S1 to S7.

[0019] S1. Determine traffic condition data of the target area, where the traffic condition data includes key locations and internal roads.

[0020] Key positions include parking positions, loading positions, unloading positions, regional exits and regional imports, and internal roads can connect at least two key positions in series. Among them, the parking position is the position where the logistics vehicle needs to park temporarily after entering the target area. The logistics vehicle needs to wait in the parking position for a certain period of time to queue up for loading or unloading; the loading position is the position where the logistics vehicle loads in the target area. After the logistics vehicle moves to the loading position, it can carry out loading operations, thereby transporting the goods in the target area outward; the unloading position is the position where the logistics vehicle unloads in the target area. After the logistics vehicle moves to the unloading position, it can carry out unloading operations, thereby transporting the materials to the target area; the regional exit and regional import are channels for logistics vehicles to enter and exit the target area. According to the actual situation of the target area, the regional import and regional exit can be set separately, and several can be set each, or they can be shared. The internal road is the road for logistics vehicles to move in the target area. The internal road needs to be able to connect at least two key positions in series to ensure that the logistics vehicle can smoothly transfer between different key positions in the target area. The actual distribution of key positions needs to be determined according to the actual situation of the target area, which will not be repeated here.

[0021] Taking into account that in some fixed areas such as factory areas, due to factors such as area limitations, some external public roads will be used to assist logistics vehicles in parking and queuing. Therefore, the traffic condition data also includes extraterritorial extension data, which includes external roads. The external roads can be connected to the area exit or the area entrance, and the external roads have a parking-related relationship with the parking locations, that is, the external roads in the extraterritorial extension data are associated with the parking locations in the traffic condition data.

[0022] S2. Plan the vehicle route based on the traffic condition data. The vehicle route includes a route generated based on the internal road and a travel node generated based on the key position, and the travel node is mapped on the route. A route needs to pass through at least one internal road, that is, it has at least one travel path, and can reach at least two key positions, that is, it has at least two travel nodes. The travel nodes and the travel path are integrated to form the vehicle route. Furthermore, the travel path and the travel nodes can be marked, the travel nodes are marked as points, and the travel path is marked as a line segment. After the travel nodes and the travel path are marked, the route is marked in the form of a multi-segment vector.

[0023] S3, based on the logistics business data and the vehicle travel route, determine the expected traffic load, the expected traffic load includes the path load corresponding to the travel path and the node load corresponding to the travel node. The method for determining the expected traffic load based on the logistics business data and the vehicle travel route includes S31 to S35.

[0024] S31. Extract logistics vehicles and logistics tasks corresponding to logistics vehicles from logistics business data. Among them, logistics business data mainly includes the material entry part and the goods exit part, which correspond to the logistics vehicle transporting materials to the unloading position and the logistics vehicle loading goods at the loading position. In actual situations, because the material entry part and the goods exit part will be completed by multiple logistics vehicles with predetermined cooperative relationships, logistics vehicles and logistics tasks corresponding to logistics vehicles can be directly extracted from logistics business data. The specific information of logistics vehicles may include vehicle specifications, license plate numbers, driver information, and device information of smart terminals such as the driver's mobile phone. Logistics tasks are logistics vehicles used to transport materials to the target area or to transport goods outward, that is, logistics vehicles need to perform unloading or loading operations.

[0025] S32. Assign a first-level weight to the vehicle route based on the logistics vehicles and logistics tasks. For the logistics tasks of logistics vehicles, whether it is loading or unloading operations, the logistics vehicles need to move along the vehicle route in the target area to complete. Therefore, the vehicle route can be assigned a first-level weight based on the logistics vehicles and logistics tasks. The first-level weight is set to a positive integer. When a logistics vehicle needs to pass through a vehicle route when performing a logistics task, the first-level weight of the vehicle route increases by 1. After traversing all logistics vehicles and logistics tasks, the first-level weight assignment can be completed. The higher the first-level weight of a vehicle route, the more logistics vehicles need to pass through the vehicle route, which means that the vehicle route is more likely to be congested.

[0026] S33. Based on the primary weight of the vehicle's route, a secondary weight is assigned to the travel node and the travel path. Because the vehicle route is composed of travel nodes and travel paths, and the travel path is determined based on the internal roads, different vehicle routes may have common travel paths and travel nodes, especially the loading and unloading positions, which will be the common travel nodes of multiple vehicle routes. On the other hand, logistics vehicle congestion also mainly occurs at travel nodes and travel paths. Therefore, it is necessary to further assign secondary weights to travel nodes and travel paths. Specifically, if a travel path or travel node belongs to multiple vehicle routes at the same time, the primary weights of all corresponding vehicle routes are accumulated to obtain the secondary weight of the travel path or travel node. The higher the secondary weight, the more likely the travel node and travel path are to be congested.

[0027] S34, based on the preset standard logistics period, the path load and node load are determined based on the secondary weight. For whether the travel node and the travel path will be congested, in addition to the number of logistics vehicles passing through the travel node and the travel path, the time factor should also be considered. If multiple logistics vehicles need to pass through a travel path or a travel node in the same time period, the probability of congestion in the travel path or the travel node will naturally increase significantly. Therefore, the present invention also determines the path load and node load based on the preset standard logistics period based on the comprehensive secondary weight. Specifically, the standard logistics period can be determined based on the actual production plan, for example, the standard logistics period is set to 8 to 12 o'clock. During the standard logistics period, material transportation and goods transportation will be carried out more intensively, and accordingly, congestion is more likely to occur. The standard logistics period consists of multiple equal-length time periods. Based on the length of the standard logistics period, the secondary weight can be increased, and the shorter the standard logistics period, the higher the multiple of the secondary weight increase. After the secondary weight is increased, it can be used as the path load and node load.

[0028] S35. Integrate the path load and the node load into the expected traffic load.

[0029] S4. Generate a path decongestion plan based on the path load and generate a node decongestion plan based on the node load. The method of generating a path decongestion plan based on the path load and generating a node decongestion plan based on the node load includes S41 to S44.

[0030] S41. Determine the expansion ratio, and expand the standard logistics period based on the expansion ratio to obtain the extended logistics period. Because the length of the standard logistics period is directly related to the expected traffic load, the possible congestion can be alleviated by expanding the standard logistics period. However, the standard logistics period cannot be expanded indefinitely, which may cause logistics vehicles to enter and exit at any time, and perform loading or unloading operations, which may easily affect the normal production rhythm. Therefore, in S41, first try to expand the logistics period, and the standard logistics period can be expanded based on a pre-set expansion multiple, for example, the expansion multiple can be set to 1.25.

[0031] S42: Preliminarily compress the secondary weights of the travel nodes and the travel paths based on the expansion ratio. Based on the expansion of the logistics period, the secondary weights that have been increased in S3 can be compressed based on the expansion multiple to reduce the secondary weights.

[0032] S43. Compress the secondary weights again based on the size parameters of the logistics vehicles. In actual implementation, different logistics vehicles may have different size specifications. The larger the size of the logistics vehicle, the more space it occupies, which will cause the capacity of the travel path to decrease, and it will be more likely to be congested. Therefore, the present invention compresses the secondary weights again in S43 in combination with the size of the logistics vehicle. Specifically, when assigning the primary weights and the secondary weights, the maximum size of the logistics vehicles used is used as a reference. When compressing the secondary weights, the more small-sized logistics vehicles are used, the higher the compression ratio of the secondary weights.

[0033] S44. When the secondary weight reaches the preset threshold, the path relief plan and the node relief plan are determined. When the secondary weight is compressed to a certain extent, that is, less than or equal to the preset threshold, the travel path and the travel node are not prone to congestion. At this time, the path relief plan and the node relief plan can be determined. The path relief plan and the node relief plan are specifically reflected in how many logistics vehicles are allowed to pass through the travel path or travel node within a time period. On the contrary, if the secondary weight cannot be less than or equal to the preset threshold after compression, the standard logistics time period is re-expanded and the expansion ratio is increased.

[0034] S5. Fusion path relief plan and node relief plan to generate a guidance relief plan based on time period. It should be noted that in the present invention, all time periods are of equal length and can be set to n minutes. The compressed secondary weights can indicate how many logistics vehicles will pass through the travel path or travel node in a time period.

[0035] S6. Generate a vehicle guidance plan based on the vehicle route and the guidance and relief plan. The vehicle guidance plan is used to control the movement of logistics vehicles in the target area based on the number of vehicles with compressed secondary weights.

[0036] S7: Send the vehicle guidance plan to the logistics vehicle, and guide the logistics vehicle to move in the target area based on the vehicle guidance plan. Specifically, after receiving the vehicle guidance plan, the logistics vehicle drives out from the parking position according to the vehicle guidance plan, and moves to the loading position, unloading position, area entrance or area exit along the vehicle travel route.

[0037] The present invention determines the vehicle route based on the actual conditions of key locations and internal roads in the target area, and determines the load of each travel path and travel node in combination with logistics business data to judge whether congestion may occur. Then, when congestion may occur, a node relief plan and a path relief plan are generated by optimizing the standard logistics time period, and finally a vehicle guidance plan is formed to ensure that within a time period, not too many logistics vehicles pass through the travel path or travel nodes, thereby fully avoiding congestion, affecting the transportation of materials and goods and normal production, and is conducive to improving logistics efficiency.

[0038] Furthermore, in order to avoid the driver being unable to determine the direction due to unfamiliarity with the internal roads, and thus causing congestion due to slow traffic speed, the dynamic position of the logistics vehicle is obtained in real time during the movement of the logistics vehicle, and a direction guidance prompt is generated based on the dynamic position and the vehicle guidance plan, and then the direction guidance prompt is sent to the logistics vehicle. More specifically, the method for obtaining the dynamic position of the logistics vehicle in real time during the movement of the logistics vehicle includes: during the movement of the logistics vehicle, establishing at least two wireless communication connections with the logistics vehicle; calculating the approximate position of the logistics vehicle based on the signal strength of the wireless communication connection; fitting the approximate position with the travel path and travel node, and correcting the approximate position to obtain the dynamic position of the logistics vehicle.

[0039] Through wireless communication connection, the approximate location of the logistics vehicle in the target area can be automatically determined. Since the logistics vehicle moves along the vehicle route in the target area, the dynamic location of the logistics vehicle can be accurately determined based on the route and the node. Furthermore, by providing direction guidance to the logistics vehicle based on the dynamic location, it is possible to avoid the logistics vehicle moving slowly due to unfamiliarity with the internal roads, further avoiding congestion, fully ensuring logistics efficiency, and avoiding affecting production.

[0040] like Figures 3 to 5 As shown, the present invention further provides a logistics vehicle guidance system for a fixed area, which is used to implement the above-mentioned logistics vehicle guidance method for a fixed area. The system includes multiple outbound indication devices 9 and multiple positioning pointing devices 10.

[0041] A plurality of outbound indication devices 9 are arranged in the parking position 6 and correspond one-to-one to the parking spaces 8 in the parking position 6 . The outbound indication devices 9 include a first display screen 13 embedded in the ground 11 .

[0042] A plurality of positioning and pointing devices 10 are arranged on a travel path or a travel node. The positioning and pointing devices 10 include a support rod 19 vertically arranged on the ground 11. A second display screen 20 for indicating direction is fixedly arranged on the upper part of the support rod 19. A wireless access module 23 is fixedly arranged on the top of the support rod 19. The logistics vehicle can establish a communication connection with the wireless access module 23 during the travel process.

[0043] In one example, in the target area 1, the distribution of the area entrance 2, the area exit 3, the loading position 4, the unloading position 5 and the external road 7 is as follows: Figure 2 As shown, the dotted line is a vehicle route. The outbound indication device 9 is correspondingly arranged on the left side of the parking space 8 and close to the exit of the parking space 8. The outbound indication device 9 also includes a shell 12 embedded in the ground 11, a first display screen 13 is fixedly arranged in the shell 12, and the top of the shell 12 is closed by a transparent protective cover 14 arranged obliquely. When the logistics vehicle enters the parking space 8, the first display screen 13 of the outbound indication device 9 can display a red warning pattern to indicate to the driver that it is currently not possible to drive out of the parking space 8. When the logistics vehicle can drive out of the parking space 8 and move to a key position such as the loading position 4, the unloading position 5 or the regional exit 3 according to the vehicle guidance plan, the first display screen 13 can display a green prompt pattern to indicate to the driver that it is currently possible to drive out of the parking space 8. After the logistics vehicle drives out of the parking space 8, the positioning pointing device 10 can be used to establish a wireless communication connection with the logistics vehicle to determine the location of the logistics vehicle, and then the license plate number of the logistics vehicle and the corresponding direction indication arrow are displayed through the second display screen 20 to guide the movement of the logistics vehicle.

[0044] In the outbound indication device 9, the transparent protective cover 14 can protect the first display screen 13 without affecting the driver's observation. Since the outbound indication device 9 is arranged on the left side of the parking space 8 near the exit, the driver can conveniently observe the outbound indication device 9. Furthermore, the transparent protective cover 14 is arranged at an angle. During natural rainfall, the rainwater can wash away dust and other impurities attached to the transparent protective cover 14, thereby ensuring the light transmission performance of the transparent protective cover 14, facilitating the driver to observe the first display screen 13 through the transparent protective cover 14, and reducing the number of manual cleaning times and the labor burden of the workers.

[0045] Considering that the first display screen 13 will generate heat during operation, in order to ensure the stable operation of the first display screen 13 and the safety of the transparent protective cover 14, the edge of the transparent protective cover 14 is fixedly connected to the ground 11 through a protective ring 17, and a plurality of heat conducting plates 16 are also provided in the housing 12. The heat conducting plates 16 pass downward through the housing 12 and are inserted into the ground 11. The heat conducting plates 16 can transfer the heat generated by the first display screen 13 and the display driver 15 for driving the first display screen 13 during operation to the soil, thereby achieving a heat dissipation effect. The heat conducting plates 16 can be made of metal.

[0046] The specific structure of the positioning and pointing device 10 is as follows: the positioning and pointing device 10 also includes a base 18, a support rod 19 is vertically fixedly arranged on the base 18, a rain shield 21 is fixedly connected to the top of the support rod 19, a wireless access module 23 is located below the rain shield 21, and a speaker 22 fixedly connected to the support rod 19 is arranged on the side of the wireless access module 23. Through the speaker 22, the license plate number and guidance information of the logistics vehicle can be played, so as to timely remind the driver to start the logistics vehicle and drive out of the parking space 8 when the driver does not continuously observe the outbound indication device 9. In the present invention, the wireless access module 23 can use WIFI technology to establish a wireless communication connection with the vehicle system of the logistics vehicle or the driver's mobile phone and other smart terminals, which belongs to mature existing technology and will not be repeated here. The above description of the disclosed embodiments enables professional and technical personnel in this field to implement or use the present invention. Various modifications to these embodiments will be obvious to professional and technical personnel in this field, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Thus, the present invention will not be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for guiding logistics vehicles in a fixed area, characterized in that: The steps include: Determine the traffic condition data of the target area, including key locations and internal roads; Planning a vehicle travel route based on traffic condition data, the vehicle travel route includes a travel path generated based on internal roads and travel nodes generated based on key locations, and the travel nodes are mapped on the travel path; Determine the expected traffic load based on the logistics business data and the vehicle travel route, the expected traffic load including the path load corresponding to the travel path and the node load corresponding to the travel node; Generate a path decongestion plan based on the path load and generate a node decongestion plan based on the node load; Integrate the path relief plan and the node relief plan to generate a guidance relief plan based on time periods; Generate a vehicle guidance plan based on the vehicle route and guidance and relief plan; The vehicle guidance plan is sent to the logistics vehicle, and the logistics vehicle is guided to move in the target area based on the vehicle guidance plan.

2. A method for guiding logistics vehicles in a fixed area as claimed in claim 1, characterized in that: Key locations include parking locations, loading locations, unloading locations, area exits and area entrances. Internal roads can connect at least two key locations in series. The traffic condition data also includes extraterritorial extension data, which includes external roads. The external roads can be connected to the regional exit or the regional entrance, and the external roads have a parking-related relationship with the parking position.

3. A method for guiding logistics vehicles in a fixed area as claimed in claim 1, characterized in that: Methods for determining expected traffic loads based on logistics business data and vehicle travel routes include: Extract logistics vehicles and logistics tasks corresponding to the logistics vehicles from logistics business data; Assign a first-level weight to the vehicle route based on the logistics vehicle and logistics task; Based on the primary weight of the vehicle's travel route, secondary weights are assigned to travel nodes and travel paths; Based on the preset standard logistics period, the path load and node load are determined based on the secondary weights; Combine path loads and node loads into expected traffic loads.

4. A method for guiding logistics vehicles in a fixed area as claimed in claim 3, characterized in that: The method for generating a path decongestion plan based on the path load and generating a node decongestion plan based on the node load includes: Determine an expansion ratio, and expand the standard logistics period based on the expansion ratio to obtain an extended logistics period; Preliminarily compressing the secondary weights of the travel nodes and travel paths based on the expansion ratio; The secondary weights are compressed again based on the size parameters of the logistics vehicles; When the secondary weight reaches the preset threshold, the path relief plan and node relief plan are determined.

5. The method for guiding logistics vehicles in a fixed area according to claim 1, characterized in that: The dynamic position of the logistics vehicle is obtained in real time during its movement, and direction guidance prompts are generated based on the dynamic position and vehicle guidance plan, and then the direction guidance prompts are sent to the logistics vehicle.

6. A method for guiding logistics vehicles in a fixed area as claimed in claim 5, characterized in that: The method for obtaining the dynamic position of the logistics vehicle in real time during the movement of the logistics vehicle includes: During the movement of the logistics vehicle, at least two wireless communication connections are established with the logistics vehicle; Calculate the approximate location of the logistics vehicle based on the signal strength of the wireless communication connection; The approximate position is fitted with the travel path and the travel node, and the approximate position is corrected to obtain the dynamic position of the logistics vehicle.

7. A logistics vehicle guidance system for a fixed area, characterized in that: The system is used to implement a logistics vehicle guidance method for a fixed area as described in any one of claims 1 to 5, and the system comprises: A plurality of outbound indication devices (9) are arranged in the parking position (6) and correspond one-to-one to the parking spaces (8) in the parking position (6), and the outbound indication devices (9) include a first display screen (13) embedded in the ground (11); A plurality of positioning and pointing devices (10) are arranged on the travel path or the travel node, the positioning and pointing devices (10) comprising a support rod (19) vertically arranged on the ground (11), a second display screen (20) for indicating direction being fixedly arranged on the upper part of the support rod (19), a wireless access module (23) being fixedly arranged on the top of the support rod (19), and the logistics vehicle can establish a communication connection with the wireless access module (23) during travel.

8. A logistics vehicle guidance system for a fixed area as claimed in claim 7, characterized in that: The outbound indication device (9) is arranged correspondingly on the left side of the parking space (8) and close to the exit of the parking space (8). The outbound indication device (9) also includes a shell (12) embedded in the ground (11). The first display screen (13) is fixedly arranged in the shell (12), and the top of the shell (12) is closed by a transparent protective cover (14) arranged obliquely.

9. A logistics vehicle guidance system for a fixed area as claimed in claim 8, characterized in that: The edge of the transparent protective cover (14) is fixedly connected to the ground (11) via a protective ring (17), and a plurality of heat conducting plates (16) are also arranged in the shell (12), and the heat conducting plates (16) pass downward through the shell (12) and are inserted into the ground (11).

10. A logistics vehicle guidance system for a fixed area as claimed in claim 7, characterized in that: The positioning and pointing device (10) further comprises a base (18), the support rod (19) being vertically fixedly arranged on the base (18), the top of the support rod (19) being fixedly connected to a rain shield (21), the wireless access module (23) being located below the rain shield (21), and a speaker (22) being fixedly connected to the support rod (19) being arranged on the side of the wireless access module (23).

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