Multi-specification steel coil sorting method based on three-dimensional storage crane

Abstract

The invention relates to the technical field of logistics sorting, in particular to a multi-specification steel coil sorting method based on a three-dimensional storage crane, which comprises the following steps: S1, arranging a warehouse-in and warehouse-out buffer area on one side of a three-dimensional warehouse, and confirming the maximum load and goods location information of the storage crane; the goods locations are numbered according to the ascending sequence of the time consumed by the storage cranes to sort the stored goods to the warehouse-in and warehouse-out buffer area; s2, according to a customer order, querying a target goods allocation where a steel coil required by a customer is located, and according to an ascending order of goods allocation numbers, determining a to-be-sorted goods allocation sequence of the storage crane; s3, according to the maximum load of the storage crane, the to-be-sorted goods allocation sequence of the steel coils is intelligently grouped, and a to-be-sorted grouping sequence is formed; s4, scheduling a storage crane to execute a steel coil sorting task according to the to-be-sorted grouping sequence; s5, if a new customer order comes, returning to S2; otherwise, ending the task; according to the method, the sorting efficiency of the multi-specification steel coils in the three-dimensional storage mode can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of logistics sorting, and in particular to a method for picking steel coils of multiple specifications based on a three-dimensional storage crane. Background Art

[0002] As we all know, warehousing is a key link between production and consumption. The level of warehousing cost is a concentrated reflection of the quality of national economic development and comprehensive competitiveness. It can effectively reduce the logistics cost of the whole society, which can not only promote industrial structure adjustment and regional coordinated development, but also help to cultivate new momentum for economic development and improve the overall operating efficiency of the national economy. In this context, if the traditional stacking warehousing storage method is still used for multi-specification steel coils, when picking the lower layer of steel coils, the upper layer of steel coils need to be removed, which will greatly reduce the picking efficiency and undoubtedly increase the warehousing cost. Three-dimensional warehousing refers to a warehouse system that uses vertical space to store goods by highly optimizing space utilization. It is widely used because it can store and access each item individually. However, when it comes to facilitating the picking and transportation of goods by storage cranes, there is still a problem of low efficiency. The present invention is based on the three-dimensional warehousing storage mode of multi-specification steel coils, and proposes a multi-specification steel coil picking method based on a three-dimensional storage crane. While improving picking efficiency and reducing warehousing costs, it also provides a demonstration for logistics companies to carry out digital transformation. Summary of the invention

[0003] In order to overcome the deficiencies in the background technology and solve the existing technical problems, the present invention discloses a method for picking multi-specification steel coils based on a three-dimensional storage crane to improve the picking efficiency of multi-specification steel coils in a three-dimensional storage mode.

[0004] To achieve the above object, the present invention adopts the following technical solution: A method for picking multi-specification steel coils based on a three-dimensional storage crane comprises the following steps: S1, setting an in-and-out buffer zone on one side of the three-dimensional storage, confirming the maximum load of the storage crane and the cargo location information in the three-dimensional warehouse, and numbering each cargo location in ascending order of the time consumed by the storage crane to pick its inventory to the in-and-out buffer zone; S2, querying the target cargo location where the steel coil required by the customer is located according to the customer order, and determining the cargo location sequence to be picked by the storage crane in ascending order according to the cargo location number; S3, intelligently grouping the cargo location sequence to be picked of the steel coil according to the maximum load of the storage crane to form a grouping sequence to be picked; S4, dispatching the storage crane to perform the steel coil picking task according to the grouping sequence to be picked, and updating the cargo location information after picking; S5, if a new customer order arrives, returning to S2; otherwise, ending the task.

[0005] Furthermore, in S1, the three-dimensional warehouse includes a plurality of longitudinal shelf groups spaced apart and arranged side by side, each shelf group includes a plurality of arranged cargo spaces, a steel coil is placed in each cargo space, the in-and-out buffer zone is correspondingly arranged outside one end of the outermost row of longitudinal shelf groups, and the maximum load of the storage crane is greater than twice the weight of the heaviest specification steel coil.

[0006] Furthermore, in S2, the target cargo location is the best cargo location. When there are multiple candidate cargo locations for the same specification of steel coils in a customer order, the time consumed by storage cranes at different cargo locations to pick them varies. The cargo location with the shortest consumption time is the best cargo location. If the customer order requires multiple steel coils of the same specification, the selected cargo locations are removed from the candidate cargo locations, and the best cargo locations are selected in turn.

[0007] Further, in S3, the sequence of storage locations to be picked for steel coils is intelligently grouped. First, it is determined whether the number of storage locations in the sequence of storage locations to be picked is greater than 1. If not, no grouping is performed; if so, grouping is started from the first storage location in the sequence of storage locations to be picked, and it is used as the first storage location of the first group, and it is deleted from the sequence of storage locations to be picked. Then, the process is carried out in sequence, and the storage location with the shortest picking time from the last storage location in the current order of the first group to the storage location to be picked is selected in the sequence of storage locations to be picked. If the sum of the weights of steel coils in all storage locations in the first group does not exceed the maximum load of the storage crane after adding it to the first group, the storage location is added to the first group, and it is deleted from the sequence of storage locations to be picked, and the selection of storage locations continues; otherwise, the subsequent selected storage locations are no longer added, and the grouping of the first group is completed; subsequent grouping is carried out according to the grouping method of the first group, and so on, until the grouping of the storage location sequence to be picked is completed, and the grouped sequence of steel coils to be picked is recorded as the grouping sequence to be picked.

[0008] Due to the adoption of the above-mentioned technical solution, the present invention has the following beneficial effects: The multi-specification steel coil picking method based on the three-dimensional storage crane disclosed in the present invention uses the three-dimensional storage for the storage of steel coils of multiple specifications, and can achieve the direct picking of steel coils of multiple specifications, effectively avoiding the disadvantage that the upper steel coils need to be removed before picking the lower steel coils in the traditional stacking storage mode; at the same time, the picking sequence can be reasonably planned according to the load of the storage crane, which significantly improves the picking efficiency and further enhances the intelligence level of steel coil storage. It is a vivid practice of digital technology enabling the transformation and upgrading of logistics warehousing and high-quality development. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the process of the present invention; Figure 2 It is a schematic diagram of the steel coil storage layout of a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0010] The technical solution of the present invention will be described below in conjunction with the accompanying drawings in the embodiments of the present invention: Combined with Figure 1 The multi-specification steel coil picking method based on the three-dimensional storage crane comprises the following steps: Step 1: Set up an inbound and outbound buffer zone on one side of the three-dimensional warehouse to confirm the maximum load of the storage crane and the cargo location information in the three-dimensional warehouse. The cargo location information mainly refers to whether there are goods stored on each specific cargo and what specifications of steel coils are stored. This information can be collected by a camera and fed back to the server. Each cargo location is numbered in ascending order according to the time consumed by the storage crane to pick up its inventory to the inbound and outbound buffer zone; As attached Figure 2 As shown, the three-dimensional warehouse includes a plurality of longitudinal shelf groups that are spaced and arranged side by side. The space between two adjacent shelf groups can be used for the movement of the storage crane. The shelf group is generally composed of two long shelves back to back, so that goods can be picked up and placed on both sides. Each long shelf includes a plurality of cargo locations arranged along the length and height directions, and a steel coil is placed in each cargo location. The in-and-out buffer zone can be correspondingly arranged outside one end of the outermost row of longitudinal shelf groups, that is, a corner of the entire three-dimensional warehouse; the storage crane generally has a traveling device and a lifting device that drives the picking head to rise and fall, and the picking head has the function of picking up, placing and carrying the steel coil. The maximum load of the storage crane is usually greater than twice the weight of the heaviest specification steel coil. The number of the cargo location is determined by the time consumed by the storage crane to pick the steel coils on each cargo location to the in-and-out buffer zone, that is, the shorter the consumption time, the smaller the number, and the longer the consumption time, the larger the number.

[0011] Step 2: query the target cargo location of the steel coil required by the customer according to the customer order, and determine the cargo location sequence to be picked by the storage crane in ascending order of the cargo location number; The target cargo location is the best cargo location. When there are multiple candidate cargo locations for the same specification of steel coils in a customer order, the time consumed by storage cranes at different cargo locations to pick them varies. Only by giving priority to the cargo location close to the inbound and outbound buffer zone can the picking efficiency be improved, and the cargo location with the shortest consumption time is the best cargo location. If the customer order requires multiple steel coils of the same specification, since one cargo location has one location, the first selected cargo location will be eliminated from the candidate cargo locations, and the best cargo location will become the second cargo location closest to the inbound and outbound buffer zone, and the best cargo location will continue to be selected in sequence.

[0012] Step 3: When the storage crane performs the picking task, it may pick up multiple steel coils at one time. If the storage locations of the multiple steel coils to be picked are far away from each other, the picking efficiency of the storage crane will be reduced. Therefore, according to the maximum load of the storage crane, the sequence of the steel coils to be picked is intelligently grouped to form a grouping sequence to be picked. Intelligently group the sequence of waiting-for-picking cargo locations for steel coils. First, determine whether the number of cargo locations in the sequence of waiting-for-picking cargo locations is greater than 1. If not, do not group. If so, start grouping from the first cargo location in the sequence of waiting-for-picking cargo locations, and use it as the first cargo location of the first group. At the same time, delete it from the sequence of waiting-for-picking cargo locations. Then, select the cargo location with the shortest picking time from the last cargo location in the current order of the first group to the cargo location to be picked in the sequence of waiting-for-picking cargo locations. If the sum of the weights of the steel coils in all cargo locations in the first group does not exceed the maximum load of the storage crane after adding it to the first group, then add the cargo location. Add it to the first group and delete it from the sequence of waiting-for-picking cargo locations, and continue to select additional cargo locations; otherwise, no more selected cargo locations will be added, and the grouping of the first group is completed. For example, assuming that the first group selects three cargo locations a, b, and c, then the picking time from b to a is the shortest, the picking time from c to b is the shortest, the total weight of the steel coils in the three cargo locations a, b, and c is less than the maximum load of the storage crane, and adding one more cargo location will exceed the maximum load of the storage crane; subsequent grouping is based on the grouping method of the first group and so on, until the grouping of the waiting-for-picking cargo location sequence is completed, and the grouped steel coil waiting-for-picking sequence is recorded as the waiting-for-picking grouping sequence.

[0013] Step 4: Dispatch the storage crane to perform the steel coil picking task according to the grouping sequence to be picked, and update the cargo location information after picking.

[0014] Step 5: If a new customer order arrives, return to step 2; otherwise, end the task.

[0015] This embodiment involves a certain enterprise's multi-specification steel coil storage customer order picking optimization problem. The following is a specific case: (1) Overview of the problem According to the above technical solution, the application scenario of a certain enterprise's multi-specification steel coil order picking is explained. The specific layout of the steel coil three-dimensional storage is as follows: Figure 2 As shown in the figure, the storage crane can only enter and exit from one end of the lane and can traverse the entire warehouse; for each lane, there are 10 layers of single-row shelves, each layer has 20 cargo spaces, and the lane width is 1.8m; the length, width and height of the three-dimensional storage cargo space are 1.2m, 1m and 1.4m respectively; the maximum load of the storage crane is 2 tons, and its average operating speed in the horizontal and vertical directions is 1.2m / s and 0.8m / s respectively; there are 6 specifications of steel coils in the three-dimensional storage, and the specific information is shown in Table 1. Table 1 Information of steel coils in storage

[0016] The specific information of the customer order is shown in Table 2. Table 2 Customer order information

[0017] The comparison of the time results with the traditional picking method is shown in Table 3 Table 3 Comparison of time required to complete order picking

[0018] (2) Results analysis Regarding the example of picking orders for multi-specification steel coils, the results in Table 3 show that the method of the present invention has obvious advantages; the reason why such a good effect is achieved is fundamentally due to the following two points: first, the present invention numbers the cargo locations based on the distance between each cargo location and the in-and-out buffer zone, thereby providing a basis for the storage crane to select the cargo location with the shortest picking time when picking; secondly, due to the limitation of the load of the storage crane itself, the storage crane cannot pick all the steel coils on the customer's order at one time, so the customer orders must be grouped. For the storage crane, when picking two cargo locations continuously, the picking time of the storage crane will be reduced when the distance between the two cargo locations is relatively close. For this reason, based on this concept, on the basis of previously selecting the picking cargo locations according to the customer orders, the cargo locations to be picked are grouped, thereby further saving the picking time for the storage crane.

[0019] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the above-mentioned embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the attached claims rather than the above description. Therefore, it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any figure marks in the claims should not be regarded as limiting the content of the claims involved.

Claims

1. A method for picking steel coils of multiple specifications based on a three-dimensional storage crane, characterized in that: The following steps are involved: S1. Set up an inbound and outbound buffer zone on one side of the three-dimensional warehouse, confirm the maximum load of the storage crane and the cargo location information in the three-dimensional warehouse, and number each cargo location in ascending order according to the time consumed by the storage crane to pick up its inventory to the inbound and outbound buffer zone; S2. Query the target cargo location of the steel coils required by the customer according to the customer order, and determine the cargo location sequence to be picked by the storage crane in ascending order of the cargo location number; S3. Intelligently group the waiting-for-picking cargo location sequence of the steel coils according to the maximum load of the storage crane to form a waiting-for-picking grouping sequence; S4, dispatching the storage crane to perform the steel coil picking task according to the group sequence to be picked, and updating the cargo location information after picking; S5. If a new customer order arrives, return to S2; otherwise, end the task.

2. The multi-specification steel coil picking method based on a three-dimensional storage crane according to claim 1 is characterized in that: In S1, the three-dimensional warehouse includes multiple longitudinal shelf groups that are spaced and arranged side by side. The shelf groups include multiple arranged cargo spaces, each of which contains a steel coil. The inbound and outbound buffer zone is located outside one end of the outermost row of longitudinal shelf groups. The maximum load of the storage crane is greater than twice the weight of the heaviest steel coil.

3. The multi-specification steel coil picking method based on a three-dimensional storage crane according to claim 2 is characterized in that: In S2, the target cargo location is the best cargo location. When there are multiple candidate cargo locations for the same specification of steel coils in a customer order, the time consumed by storage cranes at different cargo locations to pick them varies. The cargo location with the shortest consumption time is the best cargo location. If the customer order requires multiple steel coils of the same specification, the selected cargo locations will be removed from the candidate cargo locations, and the best cargo locations will be selected in turn.

4. The multi-specification steel coil picking method based on a three-dimensional storage crane according to claim 1 is characterized in that: In S3, the sequence of waiting-for-picking cargo locations of steel coils is intelligently grouped. First, it is determined whether the number of cargo locations in the sequence of waiting-for-picking cargo locations is greater than 1. If not, no grouping is performed; if so, grouping is started from the first cargo location in the sequence of waiting-for-picking cargo locations, and it is used as the first cargo location of the first group, and it is deleted from the sequence of waiting-for-picking cargo locations. Then, the sequence is performed in sequence, and the cargo location with the shortest picking time from the last cargo location in the current order of the first group to the cargo location to be picked is selected in the sequence of waiting-for-picking cargo locations. If the sum of the weights of steel coils in all cargo locations in the first group does not exceed the maximum load of the storage crane after adding it to the first group, the cargo location is added to the first group, and it is deleted from the sequence of waiting-for-picking cargo locations, and the selection of cargo locations continues; otherwise, the cargo location is no longer added, and the grouping of the first group is terminated; subsequent grouping is performed according to the grouping method of the first group, and so on, until the grouping of the waiting-for-picking cargo location sequence is completed, and the grouped steel coil waiting-for-picking sequence is recorded as the waiting-for-picking grouping sequence 。

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