CN106934580B - Inventory control method and device - Google Patents
Inventory control method and device Download PDFInfo
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- CN106934580B CN106934580B CN201710167429.3A CN201710167429A CN106934580B CN 106934580 B CN106934580 B CN 106934580B CN 201710167429 A CN201710167429 A CN 201710167429A CN 106934580 B CN106934580 B CN 106934580B
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- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/08—Logistics, e.g. warehousing, loading or distribution; Inventory or stock management
- G06Q10/087—Inventory or stock management, e.g. order filling, procurement or balancing against orders
Abstract
The invention discloses a stock control method and a stock control device, and relates to the field of automatic warehousing. The embodiment of the invention comprehensively considers the ex-warehouse distance of the turnover box, the capacity of processing tasks of the roadway and the number of types of commodities in the turnover box to determine the ex-warehouse cost, further combines the limitation of ex-warehouse flow and the quantity of the commodities needing to be ex-warehouse in the ex-warehouse list, selects the turnover box with the minimum ex-warehouse cost to carry out ex-warehouse, comprehensively measures the storage position of the turnover box, the carrying capacity of the roadway and the matching of the commodities in the ex-warehouse list and the commodities in the turnover box in the quantity and the types, further selects the turnover box with the highest ex-warehouse efficiency, and can improve the overall ex-warehouse efficiency of the commodities.
Description
Technical Field
The invention relates to the field of automatic warehousing, in particular to a warehouse control method and device.
Background
With the rapid development of the fields of electronic commerce and the like in the modern society, the requirements for logistics distribution are higher and higher, and the improvement of the efficiency of the automatic warehouse is more and more important. In the automatic warehouse, a turnover box is stored on a storage position, commodities are stored in the turnover box, the turnover box is conveyed to a picking station through a conveying line or a conveying robot, and the goods are manually or robotically picked and then packaged and distributed.
In the automatic warehouse, one commodity is stored in a plurality of turnover boxes, and a plurality of commodities are possible in one turnover box, and the storage positions of the turnover boxes are also scattered. At present, the turnover boxes are generally selected randomly when being selected, so that the ex-warehouse efficiency of the turnover boxes is low, and logistics distribution is influenced.
Disclosure of Invention
The invention aims to solve the technical problems that: how to improve the delivery efficiency of goods in the automated warehouse.
According to an embodiment of the present invention, there is provided an inventory control method including: determining the turnover box storing more than one commodity in the delivery list as a delivery alternative turnover box; determining the relational expression of the ex-warehouse cost according to the ex-warehouse distance of each ex-warehouse alternative turnover box, the number of turnover boxes to be ex-warehouse of each roadway and the number of commodity types stored in each ex-warehouse alternative turnover box; and selecting the ex-warehouse alternative turnover box which has the minimum ex-warehouse cost under the condition of meeting the flow constraint condition and the commodity quantity constraint condition as the ex-warehouse turnover box to carry out ex-warehouse according to the relational expression of the ex-warehouse cost.
In one embodiment, the relational representation of the outbound costs is determined using the following method: taking the sum of the ex-warehouse distances of all ex-warehouse alternative turnover boxes as a first variable; taking the difference between the maximum number of the turnover boxes to be delivered and the minimum number of the turnover boxes to be delivered in the roadway as a second variable; taking the sum of the reciprocals of the commodity types stored in all the ex-warehouse alternative turnover boxes as a third variable; and weighting the first variable, the second variable and the third variable according to the weights of the first variable, the second variable and the third variable to obtain a relational expression of the ex-warehouse cost.
In one embodiment, the step of selecting the ex-warehouse alternative turnover box with the minimum ex-warehouse cost as the ex-warehouse turnover box to carry out ex-warehouse under the condition that the flow constraint condition and the commodity quantity constraint condition are met comprises the following steps: selecting an ex-warehouse alternative turnover box which enables the ex-warehouse cost to be minimum under the condition that the flow constraint condition is met; judging whether the selected ex-warehouse alternative turnover boxes meet the constraint condition of the number of commodities, if not, removing the turnover boxes meeting the preset condition, and taking the remaining turnover boxes as the ex-warehouse alternative turnover boxes; and repeating the steps until the selected ex-warehouse alternative turnover box meets the constraint condition of the quantity of commodities, and taking the selected ex-warehouse alternative turnover box as the ex-warehouse turnover box for ex-warehouse.
In one embodiment, orders with commodity relevance meeting preset relevance conditions are combined into a delivery order.
In one embodiment, the step of combining the orders with the commodity relevance meeting the preset relevance condition into the delivery order comprises the following steps: selecting an order in a preset time period and adding the order into a warehouse-out order set; determining the correlation between the orders in the ex-warehouse order set and each remaining order according to the correlation between the commodities in the orders in the ex-warehouse order set and the commodities in the remaining orders in the preset time period; selecting an order with the highest correlation with the orders in the ex-warehouse order set from the rest orders and adding the selected order into the ex-warehouse order set; and repeating the process until the orders in the ex-warehouse order set reach the preset order quantity or the commodities in the orders in the ex-warehouse order set reach the preset commodity quantity, and combining the orders in the ex-warehouse order set into the ex-warehouse order.
In one embodiment, the method further comprises: determining the classification of the turnover box to be returned to the warehouse and the storage position partition corresponding to the classification; selecting a database roadway according to the backlog task quantity and the number of spare storage positions of each roadway in the storage position partition; and selecting storage positions with the delivery distance matched with the delivery rate of the turnover boxes to be returned from the storage positions corresponding to the return roadway as return storage positions of the turnover boxes to be returned, wherein the greater the delivery rate of the turnover boxes to be returned, the closer the delivery distance of the selected storage positions.
In one embodiment, the selecting the storage position with the delivery distance matched with the delivery rate of the turnover box to be returned as the returning storage position of the turnover box to be returned comprises: sorting all storage positions corresponding to the warehouse-returning roadway from far to near according to the warehouse-out distance; and selecting the storage positions with the sorting positions equal to the numerical value obtained by multiplying the ex-warehouse rate of the turnover boxes to be returned by the total number of the storage positions corresponding to the return roadway and rounding downwards as the return storage positions of the turnover boxes to be returned.
In one embodiment, the method further comprises: determining a turnover box which has the same classification with the commodities to be warehoused and stores the commodities to be warehoused in the least quantity as a warehousing alternative turnover box; and selecting the warehousing alternative turnover box with the highest correlation with the commodities to be warehoused as a storage turnover box for the commodities to be warehoused.
In one embodiment, the flow constraint condition is that the number of the selected ex-warehouse alternative turnover boxes is not less than the difference between the maximum ex-warehouse quantity and the relaxation variable and not more than the maximum ex-warehouse quantity; the constraint condition of the commodity quantity is that the total quantity of each commodity stored in the selected ex-warehouse alternative turnover box is not more than the ex-warehouse quantity of each commodity in the ex-warehouse list; the maximum warehouse-out quantity is determined according to the spare quantity of warehouse-out cache positions on each layer of the goods shelf.
In one embodiment, the delivery distance of the turnover box is the sum of the product of the layer height of the storage position of the turnover box and a balance parameter, the horizontal distance from the storage position of the turnover box to the delivery port, and the weight of cross-layer goods taking of the shuttle car; the ex-warehouse rate of the turnover box is a weighted average value of the ex-warehouse rates of the commodities stored in the turnover box; the correlation of the two commodities is the ratio of the number of the delivery lists containing the two commodities in a certain time to the total amount of the delivery lists in the certain time; alternatively, the correlation between the two commodities is a ratio of the number of orders containing both commodities in a certain time to the total number of orders in the certain time.
According to another embodiment of the present invention, there is provided an inventory control device including: the ex-warehouse alternative turnover box determining module is used for determining the turnover boxes which store more than one commodity in the ex-warehouse list as ex-warehouse alternative turnover boxes; and the ex-warehouse control module is used for determining the relational expression of the ex-warehouse cost according to the ex-warehouse distance of each ex-warehouse alternative turnover box, the number of turnover boxes to be ex-warehouse of each roadway and the commodity type number stored in each ex-warehouse alternative turnover box, and selecting the ex-warehouse alternative turnover box which enables the ex-warehouse cost to be minimum under the condition of meeting the flow constraint condition and the commodity quantity constraint condition as the ex-warehouse turnover box to carry out ex-warehouse according to the relational expression of the ex-warehouse cost.
In one embodiment, the ex-warehouse control module is configured to use a sum of ex-warehouse distances of all the ex-warehouse candidate turnaround boxes as a first variable, use a difference between the maximum number of the turnaround boxes to be ex-warehouse and the minimum number of the turnaround boxes to be ex-warehouse in a lane as a second variable, use a sum of reciprocals of the numbers of the commodity types stored in all the ex-warehouse candidate turnaround boxes as a third variable, and weight the first variable, the second variable, and the third variable according to weights of the first variable, the second variable, and the third variable to obtain the relational expression of the ex-warehouse cost.
In one embodiment, the ex-warehouse control module is configured to select an ex-warehouse alternative turnover box that minimizes the ex-warehouse cost when the flow constraint condition is satisfied, determine whether the selected ex-warehouse alternative turnover box satisfies the commodity quantity constraint condition, remove a turnover box that satisfies a preset condition if the flow constraint condition is not satisfied, use the remaining turnover boxes as the ex-warehouse alternative turnover boxes, repeat the above steps until the selected ex-warehouse alternative turnover box satisfies the commodity quantity constraint condition, and use the selected ex-warehouse alternative turnover box as the ex-warehouse turnover box to perform ex-warehouse.
In one embodiment, the device further comprises a delivery order construction module, which is used for combining the orders of which the commodity correlation meets the preset correlation condition into a delivery order.
In one embodiment, the delivery order construction module is configured to select an order in a preset time period to add to the delivery order set, determine a correlation between the orders in the delivery order set and each remaining order according to a correlation between a commodity in the order in the delivery order set and a commodity in the remaining orders in the preset time period, select an order with a highest correlation with the order in the delivery order set from the remaining orders to add to the delivery order set, repeat the above process until the order in the delivery order set reaches a preset order quantity or the commodity in the order in the delivery order set reaches the preset commodity quantity, and combine the orders in the delivery order set into the delivery order.
In one embodiment, the apparatus further comprises: and the warehouse returning control module is used for determining the classification of the turnover boxes to be returned and the storage position partitions corresponding to the classification, selecting the warehouse returning roadway according to the backlog task amount and the number of the vacant storage positions of each roadway in the storage position partitions, and selecting the storage positions with the warehouse returning distance matched with the warehouse returning rate of the turnover boxes to be returned from the storage positions corresponding to the warehouse returning roadway as the warehouse returning storage positions of the turnover boxes to be returned, wherein the larger the warehouse returning rate of the turnover boxes to be returned is, the closer the warehouse returning distance of the selected storage positions is.
In one embodiment, the warehouse returning control module is configured to sort the storage positions corresponding to the warehouse returning roadway from far to near according to the warehouse exiting distance, and select a storage position with a numerical value whose sorting position is equal to the product of the warehouse exiting rate of the turnover box to be returned by multiplying the total number of the storage positions corresponding to the warehouse returning roadway by rounding down as the warehouse returning storage position of the turnover box to be returned.
In one embodiment, the apparatus further comprises: and the warehousing control module is used for determining the turnover box which has the same classification with the commodities to be warehoused and has the least quantity of stored commodities as the warehousing alternative turnover box, and selecting the warehousing alternative turnover box with the highest correlation with the commodities to be warehoused as the storage turnover box of the commodities to be warehoused.
In one embodiment, the flow constraint condition is that the number of the selected ex-warehouse alternative turnover boxes is not less than the difference between the maximum ex-warehouse quantity and the relaxation variable and not more than the maximum ex-warehouse quantity; the constraint condition of the commodity quantity is that the total quantity of each commodity stored in the selected ex-warehouse alternative turnover box is not more than the ex-warehouse quantity of each commodity in the ex-warehouse list; the maximum warehouse-out quantity is determined according to the spare quantity of warehouse-out cache positions on each layer of the goods shelf.
According to still another embodiment of the present invention, there is provided an inventory control device including: a memory; and a processor coupled to the memory, the processor configured to perform the inventory control method as in any of the preceding embodiments based on instructions stored in the memory device.
According to yet another embodiment of the present invention, there is provided a computer-readable storage medium having stored thereon a computer program (instructions), characterized in that the program (instructions), when executed by a processor, implements the steps of the inventory control method in any of the preceding embodiments.
The embodiment of the invention comprehensively considers the ex-warehouse distance of the turnover box, the capacity of processing tasks of the roadway and the number of types of commodities in the turnover box to determine the ex-warehouse cost, further combines the limitation of ex-warehouse flow and the quantity of the commodities needing to be ex-warehouse in the ex-warehouse list, selects the turnover box with the minimum ex-warehouse cost to carry out ex-warehouse, comprehensively measures the storage position of the turnover box, the carrying capacity of the roadway and the matching of the commodities in the ex-warehouse list and the commodities in the turnover box in the quantity and the types, further selects the turnover box with the highest ex-warehouse efficiency, and can improve the overall ex-warehouse efficiency of the commodities.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 shows a schematic configuration diagram of an inventory control device according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an inventory control device according to another embodiment of the present invention.
FIG. 3 shows a flow diagram of an inventory control method of one embodiment of the invention.
FIG. 4 shows a flow diagram of an inventory control method of another embodiment of the invention.
FIG. 5 shows a flow diagram of an inventory control method of yet another embodiment of the invention.
Fig. 6 is a schematic structural diagram of an inventory control device according to still another embodiment of the present invention.
Fig. 7 is a schematic structural diagram of an inventory control device according to still another embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The scheme is provided for solving the problem of low commodity ex-warehouse efficiency in the prior art.
The inventory control devices in embodiments of the invention may each be implemented by various computing devices or computer systems, as described below in conjunction with fig. 1 and 2.
FIG. 1 is a block diagram of one embodiment of an inventory control device of the present invention. As shown in fig. 1, the apparatus 10 of this embodiment includes: a memory 110 and a processor 120 coupled to the memory 110, the processor 120 configured to execute the inventory control method of any of the embodiments of the present invention based on instructions stored in the memory 110.
The memory 110 may include, for example, a system memory, a fixed non-volatile storage medium, and the like, where the system memory stores, for example, an operating system, application programs, a Boot loader (Boot L loader), databases, and other programs.
FIG. 2 is a block diagram of another embodiment of an inventory control device of the present invention. As shown in fig. 2, the apparatus 10 of this embodiment includes: the memory 110 and the processor 120 may further include an input/output interface 230, a network interface 240, a storage interface 250, and the like. These interfaces 230, 240, 250 and the connection between the memory 110 and the processor 120 may be, for example, via a bus 260. The input/output interface 230 provides a connection interface for input/output devices such as a display, a mouse, a keyboard, and a touch screen. The network interface 240 provides a connection interface for various networking devices, such as a database server or a cloud storage server. The storage interface 250 provides a connection interface for external storage devices such as an SD card and a usb disk.
One embodiment of the inventory control method of the present invention is described below in conjunction with FIG. 3.
FIG. 3 is a flow chart of one embodiment of an inventory control method of the present invention. As shown in fig. 3, the method of this embodiment includes:
and step S302, determining the turnover box with more than one commodity in the delivery list as the delivery alternative turnover box.
Wherein, the delivery list contains more than one commodity to be delivered.
And step S304, determining the relational expression of the ex-warehouse cost according to the ex-warehouse distance of each ex-warehouse alternative turnover box, the number of turnover boxes to be ex-warehouse of each roadway and the number of commodity types stored in each ex-warehouse alternative turnover box.
The lane refers to two rows of goods shelves sharing one shuttle, the shuttle is used for carrying the turnover box to the delivery buffer position on the layer where the turnover box is located, the delivery elevator carries the turnover box to the conveying line on one layer of the goods shelves from the delivery buffer position, and then the turnover box reaches the picking station through the conveying line. Due to the limitation of the carrying capacity of the shuttle cars, the turnover boxes to be delivered out of the warehouse may be overstocked on the roadways, and in order to improve the delivery efficiency of the turnover boxes as much as possible, the number of the delivery turnover boxes among the roadways should be balanced as much as possible. Here, the number of the turnover boxes to be taken out of the lane may be the number of the turnover boxes already accumulated and the number of the alternative turnover boxes to be taken out of the lane.
Preferably, the relational representation of the ex-warehouse costs is determined by the following method: taking the sum of the ex-warehouse distances of all ex-warehouse alternative turnover boxes as a first variable; taking the difference between the maximum number of the turnover boxes to be delivered and the minimum number of the turnover boxes to be delivered in the roadway as a second variable; taking the sum of the reciprocals of the commodity types stored in all the ex-warehouse alternative turnover boxes as a third variable; and weighting the first variable, the second variable and the third variable according to the weights of the first variable, the second variable and the third variable to obtain a relational expression of the ex-warehouse cost. The specific relational expression of the ex-warehouse cost can be expressed by formula (1):
wherein S represents the total number of the ex-warehouse alternative turnover boxes, xi1 represents that the ith ex-warehouse alternative turnover box is selected as an ex-warehouse turnover box, and xi0 means that the ith delivery alternative container is not selected as the delivery container, LiAnd representing the delivery distance of the ith delivery alternative transfer container, wherein the delivery distance is, for example, the product of the layer height of the storage position of the transfer container and a balance parameter plus the horizontal distance from the storage position of the transfer container to a delivery port, the balance parameter is obtained by testing and is used for balancing the difference between the lifting speed of a delivery elevator and the horizontal speed of a conveyor belt, when the shuttle vehicle can take goods across layers, the delivery distance also needs to be increased on the basis, and the weight of the shuttle vehicle for taking goods across layers is also increased. Qj-QkDifference, C, of the containers to be delivered from any two lanes j and kiThe type of the commodity in the ith ex-warehouse alternative turnover box is shown, α and gamma are respectively the weight of the first variable, the second variable and the third variable, and the selected out-warehouse alternative turnover box can be seen from the formula (1)The smaller the ex-warehouse distance of the warehouse alternative turnover boxes is, the more balanced the number of the turnover boxes to be ex-warehouse between the roadways is, and the more kinds of commodities in the selected warehouse alternative turnover boxes are, the smaller the ex-warehouse cost is.
And S306, selecting the ex-warehouse alternative turnover box which has the minimum ex-warehouse cost under the condition of meeting the flow constraint condition and the commodity quantity constraint condition as the ex-warehouse turnover box to carry out ex-warehouse according to the relational expression of the ex-warehouse cost.
The selected ex-warehouse alternative turnover box also needs to meet flow constraint conditions and commodity quantity constraint conditions. The flow constraint condition is that the number of the selected ex-warehouse alternative turnover boxes is not less than the difference value between the maximum ex-warehouse quantity and the relaxation variable and not more than the maximum ex-warehouse quantity; the constraint condition of the commodity quantity is that the total quantity of each commodity stored in the selected ex-warehouse alternative turnover box is not more than the ex-warehouse quantity of each commodity in the ex-warehouse list; the maximum warehouse-out quantity is determined according to the spare quantity of warehouse-out cache positions on each layer of the goods shelf. The maximum ex-warehouse quantity can be obtained according to the following formula:
wherein, the formula (3) is the constraint condition of the formula (2), S represents the total number of the ex-warehouse alternative turnover boxes, xi1 represents that the ith ex-warehouse alternative turnover box is selected as an ex-warehouse turnover box, and xi0 means that the ith delivery alternative turnover box is not selected as a delivery turnover box, and BnRepresenting a set of n-th shelf ex-warehouse alternative totes, EnThe number of the vacant cache bits of the nth layer of the shelf is shown. The maximum ex-warehouse quantity is calculated according to the formulas (2) and (3), so that the flow constraint condition can be obtained, and the relaxation variable is a parameter obtained according to the test result, and is an integer such as 0, 1, 2 and the like.
Preferably, the ex-warehouse alternative turnover box which minimizes the formula (1) under the condition of meeting the flow constraint condition and the commodity quantity constraint condition is calculated, and a loop iteration method can be adopted:
firstly, the ex-warehouse alternative turnover boxes which enable the ex-warehouse cost to be the minimum under the condition that the flow constraint condition is met are selected, for example, the number of the ex-warehouse alternative turnover boxes is 10, the maximum ex-warehouse number is 5 through calculation of formulas (2) and (3), the flow constraint condition is that the flow is not less than 4 and not more than 5, and the ex-warehouse alternative turnover box which enables the out-warehouse cost to be the minimum through formula (1) is selected as A, B, C, D.
Then, whether the selected ex-warehouse alternative turnover boxes meet the constraint condition of the number of commodities is judged, if not, the turnover boxes meeting the preset condition are removed, the remaining turnover boxes are used as the ex-warehouse alternative turnover boxes, for example, 3 commodities contained in an ex-warehouse list respectively need 100, 150 and 120, but the total number of the 3 commodities in A, B, C, D is respectively 200, 250 and 150 and is more than the number of the commodities needing to be ex-warehouse, one turnover box meeting the preset condition is selected from A, B, C, D to be removed, the preset condition is that the quantity of the commodity is the minimum, the total quantity of the commodities is the minimum, the quantity of a certain commodity exceeds a threshold value, the ex-warehouse distance is the farthest, and the like, and the setting can be carried out according to actual requirements. At this time, after one ex-warehouse alternative turnover box is removed, the number of the ex-warehouse alternative turnover boxes is 9.
And repeating the steps until the selected ex-warehouse alternative turnover box meets the constraint condition of the quantity of commodities, and taking the selected ex-warehouse alternative turnover box as the ex-warehouse turnover box for ex-warehouse. In the process of repetition, the flow constraint condition needs to be determined again, and the number of the vacant bits of the out-of-store buffer can be changed. In addition, if the number of the commodities in the selected ex-warehouse alternative turnover box cannot reach the number of the commodities needing to be ex-warehouse in the ex-warehouse list, combining the remaining commodities without being ex-warehouse to the next ex-warehouse list for ex-warehouse.
The above embodiment comprehensively considers the ex-warehouse distance of the turnover box, the capacity of the processing task of the roadway and the number of the types of commodities in the turnover box to determine the ex-warehouse cost, and further combines the limitation of the ex-warehouse flow and the quantity of the commodities needing to be ex-warehouse in the ex-warehouse list, so that the turnover box with the minimum ex-warehouse cost is selected to be ex-warehouse, the storage position where the turnover box is located is comprehensively evaluated, the carrying capacity of the roadway and the matching of the commodities in the ex-warehouse list and the commodities in the turnover box in the quantity and the types are further selected, the turnover box with the highest ex-warehouse efficiency is further selected, and the whole ex-warehouse.
The invention also provides a construction method of the ex-warehouse list, which can be executed by combining the scheme in the embodiment.
And combining the orders with commodity correlation meeting the preset correlation condition into an ex-warehouse order.
Preferably, one order in a preset time period is selected to be added into the ex-warehouse order set, and the correlation between the orders in the out-warehouse order set and each remaining order is determined according to the correlation between the commodities in the orders in the out-warehouse order set and the commodities in the remaining orders in the preset time period; selecting an order with the highest correlation with the orders in the ex-warehouse order set from the rest orders and adding the selected order into the ex-warehouse order set; and repeating the process until the orders in the ex-warehouse order set reach the preset order quantity or the commodities in the orders in the ex-warehouse order set reach the preset commodity quantity, and combining the orders in the ex-warehouse order set into the ex-warehouse order.
When the delivery order is constructed, orders in a wave (preset time period) are selected as much as possible, and the problem that some orders cannot be delivered within a specified time because orders which are received later are processed first is avoided. One order may contain multiple commodities, and the correlation between two orders may be determined according to the correlation between the commodities contained in the order, which may specifically refer to the following formula:
wherein M is the number of items in the first order, N is the number of items in the second order, pmnThe correlation between the commodity m in the first order and the commodity n in the second order is, for example, a ratio of the number of delivery orders containing the two commodities to the total amount of delivery orders in a certain time, or the number of orders containing the two commodities to the order in a certain timeRatio of the total amounts. A higher correlation of the goods indicates a higher probability that both goods are simultaneously out of stock. The correlation of a remaining order with an order in the set of outbound orders is represented, for example, by the sum or average of the correlations of the remaining order with all orders in the set of outbound orders.
Furthermore, by combining the construction method of the delivery list, commodities with high correlation can be stored in the turnover box, so that the quantity of delivery turnover boxes can be reduced and the delivery efficiency can be improved when the commodities are delivered out of the warehouse.
The ex-warehouse turnover box needs to return to the goods shelf after goods are picked manually or by a robot, and the invention also provides a warehouse returning method of the ex-warehouse turnover box, which is described in the following with reference to fig. 4.
FIG. 4 is a flow chart of another embodiment of an inventory control method of the present invention. As shown in fig. 4, the method of this embodiment includes:
step S402, determining the classification of the turnover box to be returned to the warehouse and the storage position partition corresponding to the classification.
The classification of the turnover box can be determined according to the classification of the commodities stored in the turnover box, the classification of the commodities can be determined according to the delivery rate or the hot degree, if a plurality of commodities are stored in one turnover box and the classifications of the commodities are different, the classification of the turnover box is determined according to the proportion of the commodities in various classifications, for example, the class A commodity accounts for more than 50%, and the turnover box is determined to be the class A. And the turnover boxes of the same classification are stored in the same storage position partition.
And S404, selecting a warehouse roadway according to the backlog task quantity and the number of the spare storage positions of each roadway in the storage position partition.
And preferentially selecting the laneways with less backlog task amount and the number of vacant storage positions meeting the number of turnover boxes to be returned as the return laneways. Preferably, the overstocked task amount of the roadway can be divided into different degrees and respectively correspond to different first weights, the larger the overstocked task amount is, the smaller the corresponding first weight is, the number of empty spare bits in the roadway is divided into different levels and respectively correspond to different second weights, the larger the number of empty spare bits is, the larger the corresponding second weight is, the first weight and the second weight are added, and the roadway with the highest sum of the first weight and the second weight is selected as the warehouse-returning roadway.
And S406, selecting storage positions with the delivery distance matched with the delivery rate of the turnover boxes to be returned from the storage positions corresponding to the return roadway as return storage positions of the turnover boxes to be returned, wherein the greater the delivery rate of the turnover boxes to be returned is, the closer the delivery distance of the selected storage positions is.
Preferably, sorting the storage positions corresponding to the warehouse-returning roadway from far to near according to the warehouse-out distance; selecting a numerical value of which the sorting position is equal to the product of the ex-warehouse rate P of the turnover box to be returned to the warehouse and the total number V of the corresponding storage positions of the tunnel to be returned to the warehouse and taking the whole downwards
The storage position of the container is used as a warehouse returning storage position of the turnover box to be returned to the warehouse. The delivery rate of the turnover box is, for example, a weighted average of the delivery rates of the commodities stored therein.
According to the embodiment, the turnover boxes are sorted according to the classification of the turnover boxes and the ex-warehouse rate, the turnover boxes with higher ex-warehouse rate can be stored in the storage positions with shorter ex-warehouse distance, the turnover efficiency is improved, the next ex-warehouse is facilitated, and the ex-warehouse efficiency is improved. By combining the ex-warehouse scheme of the turnover box in the embodiment, the turnover box in the whole warehouse can be stored at a more reasonable position through continuous adjustment of ex-warehouse and ex-warehouse processes, so that the overall ex-warehouse and ex-warehouse efficiency of the warehouse is integrally improved.
The invention also provides a warehousing method, which is described below with reference to fig. 5.
FIG. 5 is a flow chart of yet another embodiment of an inventory control method of the present invention. As shown in fig. 5, the method of this embodiment includes:
and step S502, determining the turnover box which has the same classification with the commodities to be warehoused and stores the commodities to be warehoused with the least quantity as a warehousing alternative turnover box.
The turnover boxes with the least commodity storage quantity are selected, so that the commodity storage can be dispersed as much as possible, and the optimization space is larger when the commodities are delivered out of the warehouse and matched.
And step S504, selecting the warehousing alternative turnover box with the highest correlation with the commodities to be warehoused as a storage turnover box for the commodities to be warehoused.
The storage container for the commodity k to be put in storage can be expressed by the following formula:
h is a set of warehousing alternative turnover boxes, i represents the number of the warehousing alternative turnover boxes, and SiRepresenting the number of categories, p, of goods in the i-th warehousing alternative turnover boxjkAnd the correlation between the commodity j in the ith warehousing alternative turnover box and the commodity k to be warehoused is shown.
In addition, the layer where the warehousing alternative turnover box is currently located needs to have an empty warehouse-out cache position, and commodities in the turnover box cannot exceed the upper limit of the capacity. Further, after the storage container of the goods to be warehoused is selected, the storage container may be warehoused according to the method in the embodiment of fig. 4, that is, after step S504, steps S402 to S406 are executed. Furthermore, as the warehouse-in and warehouse-out can be carried out simultaneously, the priority can be determined according to the busy degree of the tasks of the warehouse-in and warehouse-out, if the warehouse-in priority is higher than the warehouse-out priority, the storage turnover box of the warehouse-in commodity can not be matched and positioned by the warehouse-out, and if the warehouse-out priority is higher than the warehouse-in priority, the storage turnover box can not be selected as the warehouse-in turnover box.
According to the embodiment, the storage turnover box is selected for the commodities to be warehoused according to the commodity correlation, and the commodities are stored in the storage turnover box in a dispersed mode as much as possible, so that the warehouse-out rate of the commodities stored in the warehousing turnover box is close and the probability of being hit by the same order is higher.
Further, the execution logic of the shuttle car can be defined. Considering that the shuttle cars have higher efficiency, the delivery sequence of the turnover boxes to be delivered from the same layer can be randomly arranged. The shuttle car sends the ex-warehouse circulation boxes to the ex-warehouse buffer position and then checks whether the ex-warehouse buffer position is a circulation box to be returned or not, if yes, the shuttle car returns the circulation box and then executes the next ex-warehouse task, and the shuttle car ex-warehouse task and the shuttle car return task are executed alternately. And for the condition that the shuttle cars can pick goods across layers, if the layer of the turnover box to be delivered is not provided with the shuttle cars, selecting the shuttle car which is currently idle or has the least task amount to execute the delivery task.
Furthermore, the execution logic of the ex-warehouse elevator can be defined. If the ex-warehouse hoister can take a plurality of turnover boxes once, firstly taking the turnover box which reaches the ex-warehouse cache position at first, taking out the turnover box if the layer has the turnover box which is to be ex-warehouse, if not, checking whether the ex-warehouse cache positions of other layers have the turnover box which is to be ex-warehouse or not, if so, preferentially taking the turnover box which reaches the ex-warehouse cache position at first, and if not, transporting the taken turnover box to one layer.
It should be noted that, in the above embodiments, the methods of warehouse-out, warehouse-back, warehouse-in and warehouse-out bill construction may be executed as separate schemes, or may be arbitrarily combined to form different schemes.
The present invention also provides an inventory control device, which is described below with reference to fig. 6.
FIG. 6 is a block diagram of one embodiment of an inventory control device of the present invention. As shown in fig. 6, the apparatus 60 includes:
and the ex-warehouse alternative turnover box determining module 602 is configured to determine a turnover box in which more than one commodity in the ex-warehouse list is stored as an ex-warehouse alternative turnover box.
And the ex-warehouse control module 604 is configured to determine a relational expression of ex-warehouse costs according to the ex-warehouse distance of each ex-warehouse alternative turnover box, the number of turnover boxes to be ex-warehouse in each lane, and the number of commodity types stored in each ex-warehouse alternative turnover box, and select the ex-warehouse alternative turnover box with the smallest ex-warehouse cost as the ex-warehouse turnover box to be ex-warehouse under the condition that the flow constraint condition and the commodity quantity constraint condition are met according to the relational expression of the ex-warehouse costs.
In one embodiment, the ex-warehouse control module 604 is configured to use a sum of ex-warehouse distances of all the ex-warehouse candidate turnaround boxes as a first variable, use a difference between the maximum number of the turnaround boxes to be ex-warehouse and the minimum number of the turnaround boxes to be ex-warehouse in a lane as a second variable, use a sum of reciprocals of the numbers of the commodity types stored in all the ex-warehouse candidate turnaround boxes as a third variable, and weight the first variable, the second variable, and the third variable according to weights of the first variable, the second variable, and the third variable to obtain the relational expression of the ex-warehouse cost.
In an embodiment, the ex-warehouse control module 604 is configured to select an ex-warehouse alternative transfer container that minimizes the ex-warehouse cost when the flow constraint condition is satisfied, determine whether the selected ex-warehouse alternative transfer container satisfies the commodity quantity constraint condition, remove the transfer container that satisfies the preset condition if the flow constraint condition is not satisfied, use the remaining transfer containers as the ex-warehouse alternative transfer containers, repeat the above steps until the selected ex-warehouse alternative transfer container satisfies the commodity quantity constraint condition, and use the selected ex-warehouse alternative transfer container as the ex-warehouse transfer container for ex-warehouse.
The flow constraint condition is that the number of the selected ex-warehouse alternative turnover boxes is not less than the difference value between the maximum ex-warehouse quantity and the relaxation variable and not more than the maximum ex-warehouse quantity; the constraint condition of the commodity quantity is that the total quantity of each commodity stored in the selected ex-warehouse alternative turnover box is not more than the ex-warehouse quantity of each commodity in the ex-warehouse list; the maximum warehouse-out quantity is determined according to the spare quantity of warehouse-out cache positions on each layer of the goods shelf.
Another embodiment of an inventory control device of the present invention is described below in conjunction with fig. 7.
FIG. 7 is a block diagram of another embodiment of an inventory control device of the present invention. As shown in fig. 7, the apparatus 60 may further include:
optionally, the delivery order constructing module 706 is configured to combine orders whose commodity correlation satisfies a preset correlation condition into a delivery order.
Preferably, the ex-warehouse order construction module 706 is configured to select one order in a preset time period to add to the ex-warehouse order set, determine the correlation between the orders in the ex-warehouse order set and each remaining order according to the correlation between the commodity in the order in the out-warehouse order set and the commodity in the remaining orders in the preset time period, select an order with the highest correlation with the order in the out-warehouse order set from the remaining orders to add to the out-warehouse order set, repeat the above process until the order in the out-warehouse order set reaches the preset order number or the commodity in the order in the out-warehouse order set reaches the preset commodity number, and combine the orders in the out-warehouse order set into the out-warehouse order.
Optionally, the warehouse returning control module 708 is configured to determine the classification of the circulation boxes to be returned and the storage location partition corresponding to the classification, select a lane with the smallest backlog task amount from the storage location partitions as a warehouse returning lane, and select, from the storage locations corresponding to the warehouse returning lane, a storage location with a warehouse returning distance that matches the warehouse returning rate of the circulation boxes to be returned as a warehouse returning storage location of the circulation boxes to be returned, where the larger the warehouse returning rate of the circulation boxes to be returned is, the closer the warehouse returning distance of the selected storage location is.
Optionally, the warehousing control module 710 is configured to determine a turnover box that is the same as the classification of the goods to be warehoused and stores the least number of goods to be warehoused as a warehousing candidate turnover box, and select the warehousing candidate turnover box with the highest correlation with the goods to be warehoused as the storage turnover box for the goods to be warehoused.
The present invention also provides a computer-readable storage medium having stored thereon a computer program (instructions), characterized in that the program (instructions), when executed by a processor, implements the steps of the inventory control method in any of the preceding embodiments.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (17)
1. An inventory control method, comprising:
determining the turnover box storing more than one commodity in the delivery list as a delivery alternative turnover box;
determining the relational expression of the ex-warehouse cost according to the ex-warehouse distance of each ex-warehouse alternative turnover box, the number of turnover boxes to be ex-warehouse of each roadway and the number of commodity types stored in each ex-warehouse alternative turnover box;
according to the relational expression of the ex-warehouse cost, selecting the ex-warehouse alternative turnover box which enables the ex-warehouse cost to be minimum under the condition of meeting flow constraint conditions and commodity quantity constraint conditions as an ex-warehouse turnover box for ex-warehouse;
wherein the relational representation of the ex-warehouse costs is determined by the following method:
taking the sum of the ex-warehouse distances of all ex-warehouse alternative turnover boxes as a first variable; taking the difference between the maximum number of the turnover boxes to be delivered and the minimum number of the turnover boxes to be delivered in the roadway as a second variable; taking the sum of the reciprocals of the commodity types stored in all the ex-warehouse alternative turnover boxes as a third variable; weighting the first variable, the second variable and the third variable according to the weights of the first variable, the second variable and the third variable to obtain a relational expression of the ex-warehouse cost;
the flow constraint condition is that the number of the selected ex-warehouse alternative turnover boxes is not less than the difference value between the maximum ex-warehouse quantity and the relaxation variable and not more than the maximum ex-warehouse quantity; the commodity quantity constraint condition is that the total quantity of each commodity stored in the selected ex-warehouse alternative turnover box is not more than the ex-warehouse quantity of each commodity in the ex-warehouse list; the maximum ex-warehouse quantity is determined according to the spare quantity of each layer of ex-warehouse cache positions of the goods shelf.
2. The method of claim 1,
the step of selecting the ex-warehouse alternative turnover box which enables the ex-warehouse cost to be minimum under the condition that the flow constraint condition and the commodity quantity constraint condition are met as the ex-warehouse turnover box to carry out ex-warehouse comprises the following steps:
selecting an ex-warehouse alternative turnover box which enables the ex-warehouse cost to be minimum under the condition that the flow constraint condition is met;
judging whether the selected ex-warehouse alternative turnover boxes meet the commodity quantity constraint condition, if not, removing the turnover boxes meeting the preset condition, and taking the remaining turnover boxes as the ex-warehouse alternative turnover boxes;
and repeating the steps until the selected ex-warehouse alternative turnover box meets the commodity quantity constraint condition, and taking the selected ex-warehouse alternative turnover box as the ex-warehouse turnover box for ex-warehouse.
3. The method as claimed in claim 1, wherein the orders whose commodity correlation satisfies a preset correlation condition are combined as the delivery order.
4. The method of claim 3, wherein the combining the orders whose commodity correlation satisfies the preset correlation condition into the delivery order comprises:
selecting an order in a preset time period and adding the order into a warehouse-out order set;
determining the correlation between the orders in the ex-warehouse order set and each remaining order according to the correlation between the commodities in the orders in the ex-warehouse order set and the commodities in the remaining orders in the preset time period;
selecting the order with the highest correlation with the orders in the ex-warehouse order set from the rest orders and adding the selected order into the ex-warehouse order set;
and repeating the process until the orders in the ex-warehouse order set reach the preset order quantity or the commodities in the orders in the ex-warehouse order set reach the preset commodity quantity, and combining the orders in the ex-warehouse order set into the ex-warehouse order.
5. The method as recited in claim 1, further comprising:
determining the classification of the turnover box to be returned to the warehouse and a storage position partition corresponding to the classification;
selecting a database lane according to the backlog task quantity and the number of spare storage positions of each lane in the storage position partition;
and selecting storage positions with the delivery distance matched with the delivery rate of the turnover boxes to be returned from the storage positions corresponding to the return roadway as return storage positions of the turnover boxes to be returned from the storage positions, wherein the greater the delivery rate of the turnover boxes to be returned from the storage is, the closer the delivery distance of the selected storage positions is.
6. The method of claim 5,
the step of selecting the storage position with the delivery distance matched with the delivery rate of the turnover box to be returned as the storage position for returning the turnover box to be returned comprises the following steps:
sequencing all storage positions corresponding to the warehouse returning roadway from far to near according to the warehouse outlet distance;
and selecting the storage positions with the sorting positions equal to the numerical value obtained by multiplying the ex-warehouse rate of the turnover boxes to be returned by the total number of the storage positions corresponding to the return roadway and rounding downwards as the return storage positions of the turnover boxes to be returned.
7. The method as recited in claim 1, further comprising:
determining a turnover box which has the same classification with the commodities to be warehoused and stores the commodities to be warehoused with the least quantity as a warehousing alternative turnover box;
and selecting the warehousing alternative turnover box with the highest correlation with the commodities to be warehoused as the storage turnover box of the commodities to be warehoused.
8. The method according to any one of claims 1 to 7, wherein the delivery distance of the turnover box is the sum of the floor height of the storage position of the turnover box and a balance parameter, the horizontal distance from the storage position of the turnover box to the delivery port, and the weight of cross-floor goods taking of the shuttle car;
the ex-warehouse rate of the turnover box is a weighted average value of the ex-warehouse rates of the commodities stored in the turnover box;
the correlation of the two commodities is the ratio of the number of the delivery lists containing the two commodities in a certain time to the total amount of the delivery lists in the certain time;
alternatively, the first and second electrodes may be,
the correlation between two commodities is the ratio of the number of orders containing the two commodities in a certain time to the total number of orders in the certain time.
9. An inventory control device, comprising:
the ex-warehouse alternative turnover box determining module is used for determining the turnover boxes which store more than one commodity in the ex-warehouse list as ex-warehouse alternative turnover boxes;
the ex-warehouse control module is used for determining relational expression of ex-warehouse cost according to the ex-warehouse distance of each ex-warehouse alternative turnover box, the number of turnover boxes to be ex-warehouse of each roadway and the commodity variety number stored in each ex-warehouse alternative turnover box, and selecting the ex-warehouse alternative turnover box which has the smallest ex-warehouse cost under the condition of meeting flow constraint conditions and commodity quantity constraint conditions as the ex-warehouse turnover box to carry out ex-warehouse according to the relational expression of the ex-warehouse cost;
the ex-warehouse control module is further used for taking the sum of ex-warehouse distances of all ex-warehouse alternative turnover boxes as a first variable, taking the difference between the maximum number of the turnover boxes to be ex-warehouse and the minimum number of the turnover boxes to be ex-warehouse of the roadway as a second variable, taking the sum of reciprocals of the number of commodity types stored in all the ex-warehouse alternative turnover boxes as a third variable, and weighting the first variable, the second variable and the third variable according to the weights of the first variable, the second variable and the third variable to obtain the relational expression of the ex-warehouse cost;
the flow constraint condition is that the number of the selected ex-warehouse alternative turnover boxes is not less than the difference value between the maximum ex-warehouse quantity and the relaxation variable and not more than the maximum ex-warehouse quantity; the commodity quantity constraint condition is that the total quantity of each commodity stored in the selected ex-warehouse alternative turnover box is not more than the ex-warehouse quantity of each commodity in the ex-warehouse list; the maximum ex-warehouse quantity is determined according to the spare quantity of each layer of ex-warehouse cache positions of the goods shelf.
10. The device according to claim 9, wherein the ex-warehouse control module is configured to select an ex-warehouse alternative turnover box that minimizes an ex-warehouse cost when a flow constraint condition is satisfied, determine whether the selected ex-warehouse alternative turnover box satisfies the commodity quantity constraint condition, remove a turnover box that satisfies a preset condition if the selected ex-warehouse alternative turnover box does not satisfy the commodity quantity constraint condition, use the remaining turnover boxes as ex-warehouse alternative turnover boxes, repeat the above steps until the selected ex-warehouse alternative turnover box satisfies the commodity quantity constraint condition, and use the selected ex-warehouse alternative turnover box as an ex-warehouse turnover box for ex-warehouse.
11. The apparatus of claim 9, further comprising:
and the ex-warehouse list construction module is used for combining the orders with commodity correlation meeting the preset correlation condition into the ex-warehouse list.
12. The apparatus of claim 9, wherein the outbound document building module is configured to:
selecting an order in a preset time period and adding the order into a warehouse-out order set;
determining the correlation between the orders in the ex-warehouse order set and each remaining order according to the correlation between the commodities in the orders in the ex-warehouse order set and the commodities in the remaining orders in the preset time period;
selecting the order with the highest correlation with the orders in the ex-warehouse order set from the rest orders and adding the selected order into the ex-warehouse order set;
and repeating the process until the orders in the ex-warehouse order set reach the preset order quantity or the commodities in the orders in the ex-warehouse order set reach the preset commodity quantity, and combining the orders in the ex-warehouse order set into the ex-warehouse order.
13. The apparatus of claim 9, further comprising:
and the warehouse returning control module is used for determining the classification of the turnover boxes to be returned and the storage position partitions corresponding to the classification, selecting the warehouse returning tunnels according to the backlog task amount and the number of the vacant storage positions of each tunnel in the storage position partitions, and selecting the storage positions with the warehouse returning distance matched with the warehouse returning rate of the turnover boxes to be returned from the warehouse returning tunnels from the storage positions corresponding to the warehouse returning tunnels as the warehouse returning storage positions of the turnover boxes to be returned from the warehouse, wherein the larger the warehouse returning rate of the turnover boxes to be returned from the warehouse is, the closer the warehouse returning distance of the selected storage positions is.
14. The device according to claim 13, wherein the warehouse returning control module is configured to sort the storage locations corresponding to the warehouse returning roadway from far to near according to the warehouse leaving distance, and select a storage location having a sorting position equal to a numerical value obtained by multiplying the warehouse leaving rate of the turnover box to be returned by the total number of the storage locations corresponding to the warehouse returning roadway and rounding down as the warehouse returning storage location of the turnover box to be returned.
15. The apparatus of claim 9, further comprising:
and the warehousing control module is used for determining the turnover box which has the same classification with the commodities to be warehoused and stores the commodities to be warehoused in the least quantity as the warehousing alternative turnover box, and selecting the warehousing alternative turnover box with the highest correlation with the commodities to be warehoused as the storage turnover box of the commodities to be warehoused.
16. An inventory control device, comprising:
a memory; and
a processor coupled to the memory, the processor configured to perform the inventory control method of any of claims 1-8 based on instructions stored in the memory device.
17. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the inventory control method according to any one of claims 1-8.
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| CN104036377A (en) * | 2014-06-05 | 2014-09-10 | 陕西科技大学 | Intelligent storage and distribution system optimization scheduling method based on polychromatic sets theory |
| CN104574027A (en) * | 2015-01-29 | 2015-04-29 | 中国烟草总公司北京市公司物流中心 | Tobacco logistics distribution system and method |
| CN105469201A (en) * | 2015-07-20 | 2016-04-06 | 浙江工业大学 | Method for logistics dispensing center work task processing and scheduling |
| CN106494812A (en) * | 2016-09-28 | 2017-03-15 | 裴晓飞 | A kind of intelligent induction system |
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