KR20140014522A - System and method for managing warehouse based on rfid tag information - Google Patents

Abstract

An RFID based warehouse management system and method are provided. An RFID-based warehouse management system according to an embodiment of the present invention is stored in a predetermined area within a warehouse, and manages warehouse data including a pallet with an RFID tag, the RFID tag information, and the pallet status information. A warehouse server for determining the location of the pallet in the warehouse based on the warehouse data, and an RFID reader for repeatedly reading the RFID tag information of the pallet in a predetermined area of the warehouse in a predetermined time unit and transmitting the RFID tag information to the warehouse server. Wherein, the warehouse server determines the state information of the pallet according to the displacement in the warehouse of the pallet detected by the RFID reader.

Description

RDF-based warehouse management system and method {SYSTEM AND METHOD FOR MANAGING WAREHOUSE BASED ON RFID TAG INFORMATION}

The present invention relates to an RFID-based warehouse management system and method, and more particularly, to an RFID-based warehouse management system and method capable of accurately determining pallet status information in a warehouse.

In various fields, a system (hereinafter, referred to as a business integrated management system) that manages various tasks online or offline through a predetermined terminal such as an intranet or enterprise resource planning (Enterprise Resource Planning) has been applied. In the past, the integrated business management system provided only limited functions such as an electronic bulletin board, electronic payment, or e-mail, but recently, it supports various functions related to various tasks, and all the business is a paperless business integrated management system. It can be processed only.

As an example of a business integration management system, a logistics management system has been proposed that provides various functions related to logistics operations. Logistics management system supports transport management system that manages the rate and route of transportation required to move the goods to the desired location, and the receipt, release and inventory management of warehouses that store the goods. Various subsystems such as Warehouse Management System, Contract Management System that manages contracts related to logistics storage or supply, and Billing Management System that calculates the costs incurred by logistics business It may include.

In the warehouse management system that supports the overall work of the warehouse among the above systems, it is necessary to keep the amount of inventory in the warehouse constant and to accurately identify the location of the inventory in order to maintain a smooth flow of logistics. It is necessary to keep more than a certain amount of inventory stored and stored in the warehouse, in which case it is necessary to efficiently utilize the space within the limited warehouse and identify which pallets or boxes exist in specific areas of the warehouse. In particular, since the storage and shipping operations are performed from time to time in the warehouse, productivity or efficiency may vary depending on the amount of stock and the arrangement and location of the stock.

In the conventional case, in order to effectively use the space in the warehouse, the worker manually grasps the inventory in the warehouse, and if there is not enough stock in the corresponding location, carries the inventory from another location and replenishes the corresponding location. It became.

In such a case, it is difficult to know the amount of inventory in a timely manner, and if there is not enough stock at that location at the time of delivery, the goods are moved to another location where the inventory is stored, or if there is no stock at another location. Because it can not be performed smoothly, it takes a lot of time and low efficiency.

In order to solve this problem, some conventional technologies have been proposed to manage the state information of pallets using RFID, but it is difficult to accurately determine the position of pallets due to the limitation of current RFID accuracy.

The technical problem to be solved by the present invention is to provide an RFID-based warehouse management system and method that can effectively utilize the space in the warehouse.

Another technical problem to be solved by the present invention is to provide an RFID-based warehouse management system and method that can grasp the status information of the pallet in the warehouse and maintain the pallet location information in the warehouse with high reliability.

The technical objects of the present invention are not limited to the above-mentioned technical problems, and other technical subjects not mentioned can be clearly understood by those skilled in the art from the following description.

RFID-based warehouse management system according to an embodiment of the present invention for achieving the technical problem, is placed in a predetermined area in the warehouse, including a pallet with an RFID tag, the RFID tag information and the pallet status information The warehouse server manages warehouse data, and determines the location of the pallet in the warehouse based on the warehouse data, and repeatedly reads RFID tag information of the pallet in a predetermined area of the warehouse in a predetermined unit of time. Including an RFID reader for transmitting to, the warehouse server determines the state information of the pallet according to the displacement in the warehouse of the pallet detected by the RFID reader.

RFID-based warehouse management system according to another embodiment of the present invention for achieving the above technical problem, is placed in a predetermined area in the warehouse, including a pallet with an RFID tag, the RFID tag information and the pallet status information A warehouse management server managing warehouse data, a location information server connected to the warehouse management server, determining a location of the pallet in the warehouse based on the warehouse data, and RFID tag information of the pallet within a predetermined area of the warehouse; It includes an RFID reader for repeatedly reading a predetermined time unit and transmits to the location information server, wherein the location information server determines the state information of the pallet according to the displacement in the warehouse of the pallet detected by the RFID reader do.

RFID based warehouse management method according to an embodiment of the present invention for achieving the technical problem, the step of placing a pallet with an RFID tag attached to a predetermined area in a warehouse equipped with an RFID reader, the RFID in the RFID reader Reading a tag, and determining a location of the pallet based on the reading result, wherein the RFID reader comprises: a first RFID reader scanning a first zone in the warehouse, and a second in the warehouse And a second RFID reader to scan the zone.

The details of other embodiments are included in the detailed description and drawings.

According to the embodiments of the present invention as described above, it is possible to provide an RFID-based warehouse management system and method that can efficiently utilize the space in the warehouse.

In addition, it is possible to provide a RFID-based warehouse management system and method that can grasp the status information of the pallet in the warehouse to maintain the pallet location information in the warehouse with high reliability.

In other words, by managing the pallet status in the warehouse and determining the pallet status according to the RFID tag recognition pattern, pallet status management with improved reliability becomes possible.

The effects according to the present invention are not limited by the contents exemplified above, and more various effects are included in the specification.

1 is a diagram illustrating an RFID-based warehouse management system according to an embodiment of the present invention.
2 is a view schematically showing the configuration of the warehouse of FIG.
3 is a diagram illustrating a configuration in which pallets are stacked in the warehouse of FIG. 2.
FIG. 4 is a diagram illustrating an RFID system structure for recognizing the position of the stacked pallet of FIG. 3.
5 to 10 show various state changes of the stacked pallet of FIG.
FIG. 11 is a diagram illustrating an association between palette state changes of FIGS. 5 to 10.
12 is a diagram illustrating an RFID-based warehouse management system according to another embodiment of the present invention.
13 is a flowchart illustrating a method of managing warehouse based on RFID according to an embodiment of the present invention.
14 is a flowchart specifically illustrating a pallet positioning process of FIG. 13.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

Although the first, second, etc. are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are used only to distinguish one component from another. Therefore, it goes without saying that the first component mentioned below may be the second component within the technical scope of the present invention.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. The terms " comprises "and / or" comprising "used in the specification do not exclude the presence or addition of one or more other elements in addition to the stated element.

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used in a sense that can be commonly understood by those skilled in the art. Also, commonly used predefined terms are not ideally or excessively interpreted unless explicitly defined otherwise.

Hereinafter, an RFID-based warehouse management system according to embodiments of the present invention will be described with reference to FIGS. 1 to 4. 1 is a view showing an RFID-based warehouse management system according to an embodiment of the present invention, Figure 2 is a view schematically showing the configuration of the warehouse of Figure 1, Figure 3 is a pallet stacked in the warehouse of Figure 2 4 is a diagram showing the configuration, and FIG. 4 is a diagram showing the structure of the RFID system for recognizing the position of the stacked pallet of FIG.

Referring to FIG. 1, in an RFID-based warehouse management system according to an embodiment of the present invention, a pallet 110 is placed in a predetermined area within a warehouse 100, and has an RFID tag 120 attached thereto, and the RFID tag information. And a warehouse server 200 that manages warehouse data including the pallet state information, and determines a location of the pallet 110 in the warehouse 100 based on the warehouse data, and a predetermined number of the warehouse 100. And an RFID reader 130 that repeatedly reads RFID tag information of the pallet 110 in a zone by a predetermined time unit and transmits the RFID tag information to the warehouse server 200, wherein the warehouse server 200 includes the RFID reader 130. The state information of the pallet 110 is determined according to the displacement in the warehouse 100 of the pallet 110 sensed in FIG.

The RFID-based warehouse management system according to the present embodiment may include a warehouse 100 and a warehouse server 200 that manages various data related to the warehouse 100.

Referring to FIG. 2, the warehouse 100 may be divided into a plurality of zones 100_1, 100_2, 100_3, and 100_4. Zone division of the warehouse 100 may be made in plurality, it may be freely divided according to the size of the area or the pallet of the warehouse 100.

In addition, each zone of the warehouse 100 may perform different functions according to the use of the warehouse 100. For example, the warehouse 100 may be divided into a storage area for storing and receiving goods and a storage area for storing and receiving goods, but is not limited thereto. Entry and exit areas can be set to be located in the area adjacent to the arrival and departure of the goods, and the storage and retrieval work outside the entry and exit area as storage area is limited to be carried out only within the entry and exit area adjacent to the loading dock for efficient entry and exit operations. This can be done.

In some embodiments, the plurality of zones of the warehouse 100 need not necessarily be adjacent to each other and may be spaced apart by a predetermined distance. In addition, each zone of the warehouse 100 may be physically separated, but is not limited thereto, and may be virtually partitioned by a virtual partition line.

Each zone of the warehouse 100 may further include subdivision areas such as a plurality of zones, locations, and cells.

As shown in FIG. 3, pallets 110 formed of a plurality of predetermined items may be stacked in each zone in the warehouse 100. Each pallet 110 may have a form in which a plurality of products or parts having the same specification are stacked, and for example, the pallet 110 may be arranged in predetermined rows and columns so that the pallet 110 may be freely in and out of each zone. It can be laminated uniformly (2Ⅹ3).

The plurality of pallets 110 may be received by equipment such as a worker or a forklift, loaded in a corresponding area, moved to another area, or may be shipped outside the warehouse 100. In the case of the warehouse 100 having a large amount of traffic, the pallet 110 is frequently entered and exited, and thus, it is necessary to reliably manage information on the current state and location of the pallet 110 in order to accurately identify the inventory.

Referring to Fig. 4, an RFID system structure for recognizing the position of a stacked pallet is shown. In the illustrated example, it is assumed that there is a first zone 100_1 and a second zone 100_2 in the warehouse 100. Each zone is stacked in units of a plurality of pallets 110, and each pallet 110 is attached with an RFID tag 120 for identifying the location, state and product information of the pallet 110.

Each zone of the warehouse 100 is provided with an RFID reader 130. For example, a first RFID reader 130_1 may be provided in the first zone 100_1, and a second RFID reader 130_2 may be provided in the second zone 100_2. Each RFID reader may recognize the RFID tag 120 in the recognition area by using a predetermined radio wave. The RFID tag 120 may include location information such as a pallet identifier (ID), but is not limited thereto. The RFID tag 120 may further include product information such as a product type, a standard, a manufacturing date, and the like included in the pallet 110. can do.

The RFID reader 130 may be provided in, for example, a ceiling area of the warehouse 100, but is not limited thereto, and may be any location where the RFID tag 120 may be read. The RFID reader 130 may read the RFID tag information of the pallet 110 in the warehouse 100 by a predetermined time unit and transmit the read RFID tag information to the warehouse server 200. For example, the predetermined time unit may be set in seconds, and may be arbitrarily set by the administrator in consideration of the amount of traffic of the warehouse 100.

The information of the RFID tag 120 read by the RFID reader 130 is transmitted to the warehouse server 200, and the information of the pallet 110 to which the corresponding RFID tag 120 is attached is stored in a database in the warehouse server 200. You can inquire. That is, the position and product type of the pallet 110 may be inquired from the RFID tag information of the pallet 110.

The warehouse server 200 may determine the state information of the pallet 110 according to the displacement in the warehouse 100 of the pallet 110 detected by the RFID reader 130.

Specifically, the state information and position determination of the pallet 110 may be performed by the following logic. For example, when the RFID tag 120 of the pallet 110 is recognized by the first RFID reader 130_1, the corresponding RFID tag 120 exists within the recognition range of the first RFID reader 130_1. The pallet 110 may be determined to be located in the first zone 100_1, which is a recognition range of the first RFID reader 130_1.

In addition, when the RFID tag 120 of the pallet 110 is recognized by the second RFID reader 130_2, since the corresponding RFID tag 120 exists within the recognition range of the second RFID reader 130_2, the corresponding pallet 110 may be determined to be located in the second zone 100_2, which is a recognition range of the second RFID reader 130_2.

Meanwhile, in some embodiments, the scanable recognition ranges of the first RFID reader and the second RFID reader may overlap, but are not limited thereto, and separate or physically separate the first and second zones 100_1 and 100_2. It is possible to limit only one RFID reader to operate in a zone at the same time.

As described above, the warehouse server 200 may store a plurality of item information including a database (not shown) and provide the stored item information to the terminal using wired or wireless communication according to a request of a client, for example, a terminal. Can be.

The terminal (not shown) may communicate with the warehouse server 200 to receive the information of the article. In addition, data related to the goods may be prepared and transmitted to the database of the warehouse server 200. The type of terminal is not limited, and may be, for example, a desktop computer or a laptop computer, or may be a portable terminal that communicates with the warehouse server 200 wirelessly, such as a tablet computer, a smartphone, a PDA, and the like. Therefore, the worker may carry out the work in the warehouse 100 while carrying the terminal and transmit and receive the goods information or the work information in real time.

5 to 11, a moving pattern of the pallet and a method of determining a state accordingly will be described. 5 to 10 show various state changes of the stacked pallet of FIG. 3, and FIG. 11 shows the relationship between the pallet state changes of FIGS.

The state information of the pallet 110 includes an initial state before the pallet 110 is placed in a predetermined zone, a moving state in which the pallet 110 moves from a predetermined zone to another zone, and the pallet 110 between a plurality of zones. The passing state passing through the passage of the, the pallet 110 is separated from the predetermined zone existing between the other zones, the pallet 110 is released from the predetermined zone and the pallet 110, It can be classified into an arrival state arranged in a predetermined area.

Referring to FIG. 5, the initial state before the pallet 110 newly loaded into the warehouse 100 is placed in a predetermined area is illustrated. In the initial state, since the pallet 110 exists outside the valid recognition range of the RFID reader 130, the RFID tag information is kept unread.

Referring to FIG. 6, a state in which an arrangement of the pallet 110 is determined in the initial state and the pallet 110 is received into the second zone 100_2 is shown. The pallet 110 is in a state where an RFID tag 120 indicating a predetermined pallet ID is attached and is included in a range that can be recognized by the second RFID reader 130_2 existing in the second zone 100_2. Accordingly, the RFID tag 120 of the pallet 110 is read by the second RFID reader 130_2, and the recognized information is transmitted to the warehouse server 200 and then the pallet 110 at the warehouse server 200. Determines that the RFID tag 120 belongs to the detection range of the second RFID reader 130_2, and thus, the pallet 110 enters the second zone 100_2 so that state information and / or location information may be modified. .

Referring to FIG. 7, a shipment state in which the pallet 110, which has been kept in the received state, is separated from the second zone 100_2 by an operator or the like is illustrated. That is, the pallet 110, which is recognized as being stored in the second zone 100_2 by being read at a predetermined cycle, is not read by the second RFID reader 130_2 of the second zone 100_2. If it is not read by the reader 130 of the zone, it may be determined that it is shipped out of the storage area of the warehouse 100.

Referring to Figure 8, the pallet 110 is shown from the second zone (100_2) is separated from the fourth zone (100_4) which is present between the other zone is shown. That is, when the pallet 110 read by the second RFID reader 130_2 of the second zone 100_2 is simultaneously detected by the second RFID reader 130_2 and the fourth RFID reader 130_4, the warehouse server ( 200 may set the state information of the pallet 110 as a stale state based on such information. When the pallet 110 is temporarily placed between the second zone 100_2 and the fourth zone 100_4, the pallet 110 is simultaneously from the second RFID reader 130_2 and the fourth RFID reader 130_4. Can be recognized. In this case, the warehouse server 200 may determine that the pallet 110 is located between the second zone 100_2 and the fourth zone 100_4, and the state information of the pallet 110 may be shipped or moved. It can be determined as a temporary state before entering the state.

Referring to FIG. 9, a moving state in which the pallet 110 moves from the second zone 100_2 to the fourth zone 100_4, which is another zone, is illustrated. That is, when the pallet 110 read by the second RFID reader 130_2 of the second zone 100_2 is detected by the fourth RFID reader 130_4 within a predetermined first time interval, the warehouse server 200 May set the state information of the pallet 110 to a moving state based on such information. When the pallet 110 is moved from the second zone 100_2 to the fourth zone 100_4 within a predetermined first time interval, for example, within 30 seconds, the pallet 110 is moved from the second RFID reader 130_2. After being recognized, the second RFID reader 130_2 may be recognized instead of the fourth RFID reader 130_4. In this case, the warehouse server 200 may determine that the pallet 110 has moved from the second zone 100_2 to the fourth zone 100_4, and may determine the state information of the pallet 110 as the movement state. .

Referring to FIG. 10, a passing state in which the pallet 110 passes through a passage between a plurality of zones is shown. That is, when the pallet 110 is detected by the plurality of RFID readers 100_1, 100_2, 100_3, and 100_4 and the undetected state is repeated a predetermined number or more times, the warehouse server 200 determines that the pallet 110 is located between the plurality of zones. Recognizing as passing through the state information of the pallet 100 can be set to the passing state.

Referring to FIG. 11, the relationship between state information of the pallet 110 is shown. That is, in the initial state, the pallet 110 is maintained in a state that does not belong to any area within the warehouse 100, and when the pallet 110 passes between a plurality of zones, the state of the pallet 110 is changed to a passing state. In case of entering a certain area, it is changed to arrival status. Thereafter, the pallet 110 stored in a predetermined area may be changed to a moving state, a shipping state, and a stale state according to a moving pattern, and each state may be changed to a different state. When the pallet 110 is separated from a predetermined zone and the corresponding pallet 110 is not detected in all areas of the warehouse 100, the pallet 110 may be recognized as an initial state after changing to a shipment state.

Hereinafter, an RFID-based warehouse management system according to another embodiment of the present invention will be described with reference to FIG. 12. 12 is a diagram illustrating an RFID-based warehouse management system according to another embodiment of the present invention.

Referring to FIG. 12, the RFID-based warehouse management system according to the present embodiment is placed in a predetermined area within a warehouse 100, and includes a pallet 110, an RFID tag information, and pallet state information to which an RFID tag 120 is attached. Warehouse management server 300 for managing the warehouse data, including the storage management server 300 is connected to, the location information server 400 for determining the location of the pallet 110 in the warehouse 100 based on the warehouse data And, and the RFID reader 130 for reading the RFID tag information of the pallet 110 in the predetermined area of the warehouse 100 by a predetermined time unit and transmits to the location information server 400, the location information server 400 is The state information of the pallet 110 is determined according to the displacement in the warehouse 100 of the pallet 110 detected by the RFID reader 130.

According to this embodiment, unlike the previous embodiment, not all data processing and location determination is performed in the warehouse server, data management is performed in the warehouse management server 300, the location information server 400 is RFID reader 130 And location information and status information of the pallet 110 is determined based on the data received from the warehouse management server 300.

When the warehouse 100 is larger than or equal to a predetermined size, the number of pallets 110 and the corresponding RFID tags 120 stacked in the warehouse 100 is greatly increased, thereby increasing the number of RFID tags 120 read per unit time and As a result, data throughput may be greatly increased, and an excessive load on the server may cause data overflow.

To prevent this, a series of operations related to location information and status information by separating the location information server 400 between the warehouse 100 and the warehouse management server 300 may be performed in the location information server 400. .

In addition, the rest of the configuration may be substantially the same as described in the previous embodiment.

Hereinafter, an RFID-based warehouse management method according to an embodiment of the present invention will be described with reference to FIGS. 13 and 14. FIG. 13 is a flowchart illustrating an RFID based warehouse management method according to an embodiment of the present invention, and FIG. 14 is a flowchart illustrating a pallet positioning process of FIG. 13 in detail.

RFID based warehouse management method according to the present embodiment, the step of placing the pallet with the RFID tag attached to a predetermined area in the warehouse equipped with the RFID reader (S110), the step of reading the RFID tag in the RFID reader (S120), And determining the position of the pallet based on the reading result (S130), wherein the RFID reader comprises: a first RFID reader scanning a first zone in the warehouse, and a second RFID reader scanning a second zone in the warehouse It may include.

Referring to Fig. 14, a pallet positioning and state determination process is shown.

First, the RFID tag of the pallet is read by the RFID reader (S210). The reading result is transmitted to the server, and the server determines the state of the pallet in consideration of the position information of the pallet included in the RFID tag.

In detail, when the pallet is detected by the second RFID reader within the first time interval after the pallet is detected by the first RFID reader (S220), the state information of the pallet may be set to the moving state (S230).

In addition, when the pallet is detected by the first RFID reader and the second RFID reader at the same time (S240), it is possible to set the status information of the pallet as a stale state (S250).

In addition, when the pallet is detected by the first RFID reader or the second RFID reader and the undetected state is repeated a predetermined number of times (S260), the state information of the pallet may be set to a passing state (S270). If it is not the movement state, stale state, and pass state, the state information may be modified to one of an initial state, an arrival state, and a shipment state in consideration of a change in the position of the pallet according to the read result (S280).

In addition, when there is no change in the position of the pallet as a result of reading the RFID tag, the existing state information may be maintained as it is.

As described above, according to the embodiments of the present invention, by grasping the status information of the pallets in the warehouse, it is possible to maintain the pallet position information in the warehouse with high reliability, to refine the pallet status in the warehouse, and the pallet status according to the RFID tag recognition pattern. By determining this, the pallet state management with improved reliability is possible.

In this way, when the status of the pallet is determined, an appropriate instruction can be transmitted to the terminal and the like in response to this, and prompt business processing in the warehouse can be performed.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, You will understand. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

100: warehouse
110: pallet
120: RFID tag
130: RFID reader
200: warehouse server
300: warehouse management server
400: location information server

Claims (18)

A pallet placed in a predetermined area within the warehouse and to which an RFID tag is attached;
A warehouse server managing warehouse data including the RFID tag information and pallet status information and determining a location of the pallet within the warehouse based on the warehouse data; And
Including a RFID reader for reading the RFID tag information of the pallet in a predetermined area of the warehouse in a predetermined time unit and transmits it to the warehouse server,
The warehouse server determines the status information of the pallet according to the displacement in the warehouse of the pallet detected by the RFID reader, RFID-based warehouse management system. The method of claim 1,
The state information of the palette is
An initial state before the pallet is placed in the predetermined area,
A movement state in which the pallet moves from the predetermined zone to another zone,
A passage state in which the pallet passes through a passage between a plurality of zones,
The pallet is separated from the predetermined zone and exists between the other zones;
A shipment state in which the pallet is separated from the predetermined area;
RFID-based warehouse management system comprising at least one of the state of arrival in which the pallet is arranged in the predetermined area. The method of claim 1,
The RFID reader includes a first RFID reader scanning a first zone in the warehouse and a second RFID reader scanning a second zone in the warehouse. 5. The method of claim 4,
The scan range of the first RFID reader and the second RFID reader partially overlap, RFID-based warehouse management system. 5. The method of claim 4,
And when the pallet is detected by the second RFID reader within a first time interval after the pallet is detected by the first RFID reader, the warehouse server sets state information of the pallet to a moving state. 5. The method of claim 4,
And when the pallet is detected by the first RFID reader and the second RFID reader at the same time, the warehouse server sets the state information of the pallet to a stale state. 5. The method of claim 4,
The pallet is detected by the first RFID reader or the second RFID reader. If the undetected state is repeated a predetermined number or more times, the warehouse server sets the state information of the pallet to a pass state. system. A pallet placed in a predetermined area within the warehouse and to which an RFID tag is attached;
A warehouse management server for managing warehouse data including the RFID tag information and the pallet state information;
A location information server connected to the warehouse management server and determining a location of the pallet in the warehouse based on the warehouse data; And
Including a RFID reader for reading the RFID tag information of the pallet in a predetermined area of the warehouse for a predetermined time unit and transmits it to the location information server,
The location information server determines the state information of the pallet in accordance with the displacement in the warehouse of the pallet detected by the RFID reader, RFID-based warehouse management system. 9. The method of claim 8,
The state information of the palette is
An initial state before the pallet is placed in the predetermined area,
A movement state in which the pallet moves from the predetermined zone to another zone,
A passage state in which the pallet passes through a passage between a plurality of zones,
The pallet is separated from the predetermined zone and exists between the other zones;
A shipment state in which the pallet is separated from the predetermined area;
RFID-based warehouse management system comprising at least one of the state of arrival in which the pallet is arranged in the predetermined area. 9. The method of claim 8,
The RFID reader includes a first RFID reader scanning a first zone in the warehouse and a second RFID reader scanning a second zone in the warehouse. 11. The method of claim 10,
The scan range of the first RFID reader and the second RFID reader partially overlap, RFID-based warehouse management system. 11. The method of claim 10,
When the pallet is detected by the second RFID reader within a first time interval after the pallet is detected by the first RFID reader, the location information server sets the status information of the pallet to a moving state, RFID-based warehouse management system . 11. The method of claim 10,
When the pallet is detected by the first RFID reader and the second RFID reader at the same time, the location information server sets the status information of the pallet to the stabilization state, RFID-based warehouse management system. 11. The method of claim 10,
The pallet is detected by the first RFID reader or the second RFID reader. If the undetected state is repeated more than a predetermined number of times, the location information server sets the state information of the pallet to a passing state. Management system. Placing a pallet to which an RFID tag is attached in a predetermined area in a warehouse equipped with an RFID reader;
Reading the RFID tag from the RFID reader; And
Determining the position of the pallet based on the reading result,
The RFID reader includes a first RFID reader scanning a first zone in the warehouse, and a second RFID reader scanning a second zone in the warehouse. 16. The method of claim 15,
When the pallet is detected by the second RFID reader within a first time interval after the pallet is detected by the first RFID reader, setting the status information of the pallet to a moving state. . 16. The method of claim 15,
When the pallet is detected by the first RFID reader and the second RFID reader at the same time, further comprising the step of setting the state information of the pallet to the stale state, RFID-based warehouse management method. 16. The method of claim 15,
If the pallet is detected by the first RFID reader or the second RFID reader and the undetected state is repeated more than a predetermined number of times, setting the state information of the pallet to pass state, RFID-based warehouse How to manage.

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