Label checking method of UHF handheld terminal and UHF handheld terminal

Abstract

The invention discloses a tag checking method of a UHF handheld terminal and the UHF handheld terminal. The method comprises the steps that electronic product code EPC area data of a label is read, and the EPC area data comprises a cyclic redundancy check CRC code of the label, a protocol control PC code of the label and an EPC of the label; the CRC code of the label is compared with a target CRC code in a preset label data table, in the label data table, the target CRC code corresponds to a target PC code and a target EPC code, and the target CRC code is one CRC code in the label data table; if it is determined that the CRC code of the tag does not exist in the tag data table, it is determined that the tag is an illegal tag; and if it is determined that the CRC code of the tag is the same as the target CRC code, but the PC code of the tag is different from the target PC code, and / or the EPC of the tag is different from the target EPC, it is determined that the tag is an illegal tag. In this way, illegal tags read in series can be screened out, so that the checking efficiency can be improved, and the checking accuracy can be improved.

Description

technical field [0001] The present application relates to the technical field of radio frequency identification, and in particular to a label inventory method of an ultra high frequency (ultra high frequency, UHF) handheld terminal and the UHF handheld terminal. Background technique [0002] Radio Frequency Identification (RFID) is an automatic identification technology and a key technology for building the Internet of Things. The RFID system is mainly composed of readers and transponders. A transponder is mainly composed of an antenna, a coupling element, and a chip. Generally speaking, a tag is used as a transponder. Each tag has a unique electronic product code (EPC), which is attached to an object to identify the target object. The reader, or reader, is mainly composed of an antenna, a coupling element and a chip. It is a device for reading and / or writing tag information, and can be designed as a mobile handheld device or a fixed device. [0003] The application of RFI...

AI Technical Summary

Problems solved by technology

However, due to the long reading distance of UHF technology, which can support multi-label inventory, there are some advantages and some other problems in practice

When carrying out a large number of tag inventory, it is easy to read other tags

For example, in some store or warehouse application scenarios, it is possible to read the labels of other stores or other warehouses, which may cause some illegal labels to be counted during the inventory process, thus mistakenly identifying labels that do not belong to the store or warehouse. Inventory of labels

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