An anti-collision method for UHF reader-writer dedicated to electric power smart meters

A reader-writer and smart meter technology, applied in the field of RFID anti-collision, can solve the problems of complex signals reflected back to the reader, low recognition rate, electronic label signal interference, etc., to improve reading speed, reduce collision probability, The effect of preventing signal interference

Active Publication Date: 2017-05-31
SHENZHEN KELU INTERNET OF THINGS INFORMATION TECH CO LTD
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AI Technical Summary

Problems solved by technology

[0012] In the above method, due to the large amount of metal contained in the electric smart meter, the signal of the electronic tag is greatly interfered, resulting in complex signals reflected back to the reader and a low recognition rate.

Method used

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  • An anti-collision method for UHF reader-writer dedicated to electric power smart meters

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Embodiment Construction

[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] Such as figure 1 As shown, the steps of an anti-collision method for a UHF reader-writer dedicated to electric smart meters are as follows:

[0033] 0) Steps in which the reader / writer works in a frequency hopping manner.

[0034] 1) The reader sends a Select command, which is used to set the inventory flags of the S section of all tags to A.

[0035] 2) The reader sends a Query command, which is used to select all tags with the inventory mark of A in the S section for inventory, set the number of received tags N to 0, set the number of cycles A to 2, set Q to Qs, and set the selected tag A step where the number of cycles A_Select is 1.

[0036] 3) It is used to set the number of collisions C to 0, and obtain the total number of time slots Slot_Count according to the Q value, and the total number of time slots Slot_Count is ...

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Abstract

An anti-collision method for a super-high frequency reader-writer dedicated for an electricity intelligent meter, and the method includes the following steps: 0) frequency hopping; 1) sending Select command; 2) sending Query command; 3) resetting the collision number C to 0 to obtain total time slot number Slot __ Count; 4) circularly waiting for RN 16 answered by a tag; 5) sending Query Rep command; 6) adding 1 to C in case that the response of the stag is obtained in the step 4), but EPC can not be read out, or adding 1 to N in case that EPC is read out; 7) in case the Slot is not zero, returning to the step 4); 8) in case that A is zero, returning to the step 3); in case that A __ Select is not zero, returning to the step 3); and sending EPC of N stags to an upper computer. The anti-collision method greatly decreases the probability of collision, and improves the reading speed.

Description

technical field [0001] The invention relates to an RFID anti-collision method, in particular to an anti-collision method for an ultra-high frequency reader-writer dedicated to electric smart meters. Background technique [0002] The existing anti-collision methods are: [0003] 1) The reader sends the Select command to set the inventory flags of the S section of all tags to A. [0004] 2) The reader sends a Query command, selects all tags with the inventory flag of A in the S section for inventory, sets the number of received tags N to 0, sets the number of cycles A to 2, and sets the Q value to Qs. [0005] 3) The reader sets the number of collisions C to 0, and obtains the total number of time slots Slot_Count (2 to the Q power) according to the Q value, and sets the Slot as Slot_Count. [0006] 4) The reader cyclically waits for the RN16 of the tag response, and if it receives the response from the tag, it sends an ACK command to the tag, and then reads the EPC, otherwi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K7/00
Inventor 袁锋超
Owner SHENZHEN KELU INTERNET OF THINGS INFORMATION TECH CO LTD
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