CN-122022683-A - RFID-based precise tracing method, device and system for refrigerator tray and refrigerator position

CN122022683ACN 122022683 ACN122022683 ACN 122022683ACN-122022683-A

Abstract

The application discloses a method, a device and a system for precisely tracing a refrigerator tray and a refrigerator position based on RFID. The method comprises the steps of controlling an RFID reader-writer to read a tray RFID tag and a library position RFID tag in the operation process of a tray to obtain read information, carrying out association calculation on a unique tray identification code and a unique library position identification code in the same operation process in a preset association time window to obtain an association result, determining a corresponding positioning result based on the association result, updating inventory data based on the positioning result and generating tray circulation track data so as to trace the tray in the dimension of the library position. According to the application, the double-label information of the tray and the bin position is acquired in real time in the operation links of warehouse entry/moving warehouse entry/warehouse exit and the like, and the association positioning is carried out by combining the preset association time window and the read signal intensity, so that the accurate positioning of the tray in the dimension of the bin position and the tracing of the whole flow path are realized, the timeliness and the accuracy of updating the inventory data of the refrigerator are improved, and the misplacement, missing scanning and inventory cost is reduced.

Inventors

CHEN BINBIN
LIU XINGLIANG
WANG KAI
SHI WEIQI

Assignees

深圳前海粤十信息技术有限公司

Dates

Publication Date: 20260512
Application Date: 20260127

Claims (12)

1. The RFID-based precise tracing method for the refrigerator tray and the refrigerator position is characterized by comprising the following steps of: the method comprises the steps of controlling an RFID reader to read a tray RFID tag and a library position RFID tag in the operation process of the tray to obtain read information, wherein the operation process at least comprises warehousing, moving and/or ex-warehouse, and the read information at least comprises a unique tray identification code, a unique library position identification code, corresponding read time and read signal intensity; in a preset association time window, carrying out association calculation on the unique tray identification code and the unique library identification code in the same operation process to obtain an association result; Determining a corresponding positioning result based on the association result; and updating inventory data and generating tray circulation track data based on the positioning result so as to realize the tracing of the trays in the dimension of the stock position.
2. The method of claim 1, further comprising performing a time synchronization and validity check on the read information after the obtaining the read information and before performing the correlation calculation.
3. The method of claim 2, wherein the time synchronizing the read information comprises: Calibrating a local clock based on network time service to unify the reading time; or converting the reading time based on the time reference of the RFID reader-writer so as to unify the reading time.
4. The method of claim 2, wherein the verifying the validity of the read information comprises: Repeating the reading and de-duplication of the read information; carrying out validity check on the unique identification code of the tray and/or the unique identification code of the library position; checking the integrity of the time stamp of the reading time; And eliminating the read information with the read signal strength lower than a preset signal strength threshold value.
5. The method of claim 1, wherein the performing association calculation on the unique tray identifier and the unique library identifier in the same operation process within a preset association time window to obtain an association result includes: Determining a candidate unique identification code set related to the unique identification code of the tray in the same operation process based on the unique identification code of the library in a preset association time window; Counting the simultaneous occurrence times and/or the reading signal intensity of the unique tray identification code and each unique candidate library identification code in the unique candidate library identification code set; calculating the association confidence between the unique tray identification code and each unique candidate library position identification code according to the simultaneous occurrence times and/or the read signal intensity; And storing the unique tray identification code, the unique candidate library position identification codes and the corresponding association confidence degrees as association results.
6. The method of claim 5, wherein the determining a respective positioning result based on the association result comprises: Aiming at the same unique tray identification code, acquiring a plurality of unique candidate library position identification codes corresponding to the unique tray identification code and associated confidence levels thereof from the associated result; Selecting the unique identification code of the library position with the highest association confidence coefficient and higher than a preset confidence coefficient threshold value as a unique identification code of a target library position corresponding to the unique identification code of the tray; And establishing a one-to-one correspondence between the unique identification code of the tray and the unique identification code of the target library position to obtain a positioning result of the tray in the library position dimension.
7. The method of claim 1, wherein updating inventory data and generating tray flow trajectory data based on the positioning results comprises: when the pallet is put in storage, writing the corresponding storage position into the current storage position field of the pallet, and marking the occupied state of the corresponding storage position as occupied; when a pallet is subjected to warehouse-out operation, the field of the current warehouse position of the pallet is empty, and the occupied state of the corresponding warehouse position is marked as available; when the pallet moves the warehouse, the current warehouse site field of the pallet is updated from the source warehouse site before the warehouse moving to the target warehouse site after the warehouse moving, and the occupation states of the source warehouse site and the target warehouse site are synchronously updated.
8. RFID-based refrigerator tray and accurate traceability device of storehouse position, its characterized in that includes: The information acquisition module is used for controlling the RFID reader-writer to read the tray RFID tag and the library position RFID tag in the operation process of the tray to obtain read information, wherein the operation process at least comprises warehousing, moving and/or ex-warehouse, and the read information at least comprises a unique tray identification code, a unique library position identification code, corresponding read time and read signal intensity; The association calculation module is used for carrying out association calculation on the unique tray identification code and the unique library identification code in the same operation process within a preset association time window to obtain an association result; the position judging module is used for determining a corresponding positioning result based on the association result; and the data updating module is used for updating the inventory data based on the positioning result and generating tray circulation track data so as to realize the tracing of the trays in the bin dimension.
9. RFID-based refrigeration house tray and accurate traceability system of storehouse position, characterized by comprising: The tray RFID tag is arranged on the tray and used for storing a unique identification code of the tray; the library RFID tag is arranged at the cold library and used for storing the unique identification code of the library; the system comprises at least one RFID reader-writer, a database and a database, wherein the RFID reader-writer is used for reading the tray RFID tag and the database RFID tag in the processes of tray warehousing, moving and/or ex-warehouse operation to generate reading information, and the reading information at least comprises a unique tray identification code, a unique database identification code, corresponding reading time and reading signal intensity; a refrigeration house control terminal in communication with the RFID reader for performing the method steps of any one of claims 1-7.
10. An electronic device comprising a memory and a processor, the memory storing a computer program or instructions that, when executed by the processor, implement the method of any one of claims 1-7.
11. A computer readable storage medium, characterized in that the storage medium has stored therein a computer program or instructions which, when executed by a processor, implement the method of any of claims 1-7.
12. A computer program product comprising a computer program or instructions which, when executed by a processor, implements the method of any of claims 1-7.

Description

RFID-based precise tracing method, device and system for refrigerator tray and refrigerator position Technical Field The application relates to the technical field of cold chain storage, in particular to a method, a device and a system for precisely tracing a cold storage tray and a storage position based on RFID. Background With the large-scale development of cold chain storage, the cold storage operation presents the characteristics of high frequency occurrence of storage, moving and leaving, the tray quickly circulates among different storage positions, and factors such as low temperature, frosting, metal shelf shielding and the like easily influence the reading and manual operation efficiency. Under the background, if the binding between the tray and the library is mainly dependent on manual code scanning, paper surface recording or single code reading confirmation, the situations of inaccurate binding, untimely updating of the library, data confusion caused by multi-tray cross operation in the same time period and the like often occur, and further the problems of misplacement and misplacement, inconsistent account and reality and difficulty in restoring the tray track according to the dimension of the library later are caused. In the prior art, one type of scheme only carries out one-time acquisition at a warehouse entry or warehouse exit node, and lacks effective records of warehouse shifting and other processes, so that the relation between a pallet and a warehouse position cannot be continuously and accurately updated, while the other type of scheme introduces RFID (Radio Frequency Identification ), but establishes the relation between the pallet and the warehouse position in a mode of 'reading and binding', does not carry out association calculation on the pallet code and the warehouse position code based on a preset association time window in the same operation process, and is easy to generate error association when a plurality of pallets are operated in parallel or adjacent warehouse positions are simultaneously read, thereby leading to unreliable positioning results, further causing inaccurate update of inventory data, incomplete warehouse position level circulation track and difficult realization of accurate tracing. The above information disclosed in this background section is only included to enhance understanding of the background of the disclosure and thus may contain information that does not form a related art that is already presently known to those of ordinary skill in the art. Disclosure of Invention The application provides a method, a device and a system for precisely tracing a refrigerator tray and a refrigerator position based on RFID, which are used for solving the problems that the binding of the tray and the refrigerator position is inaccurate, the updating of the inventory is not timely, and the refrigerator position level tracing is difficult to realize. The application adopts the following technical scheme: In a first aspect, the application provides an RFID-based refrigerator tray and a refrigerator position accurate tracing method, which comprises the following steps: The RFID reader-writer is controlled to read the tray RFID tag and the library position RFID tag in the operation process of the tray to obtain read information, wherein the operation process at least comprises warehousing, moving and/or ex-warehouse, and the read information at least comprises a unique tray identification code, a unique library position identification code, corresponding read time and read signal intensity; In a preset association time window, carrying out association calculation on the unique tray identification code and the unique library identification code in the same operation process to obtain an association result; determining a corresponding positioning result based on the association result; And updating inventory data based on the positioning result and generating tray circulation track data so as to realize the tracing of the trays in the dimension of the stock position. According to the application, the double-label information of the tray and the bin position is acquired in real time in the operation links of warehouse entry/moving warehouse entry/warehouse exit and the like, and the association positioning is carried out by combining the preset association time window and the read signal intensity, so that the accurate positioning of the tray in the dimension of the bin position and the tracing of the whole flow path are realized, the timeliness and the accuracy of updating the inventory data of the refrigerator are improved, and the misplacement, missing scanning and inventory cost is reduced. With reference to the first aspect, in an optional implementation manner, after obtaining the read information and before performing the association calculation, time synchronization and validity check are further performed on the read information. With reference to the first aspect, in a