Multi-microcontroller radio frequency identification read-write device and data transmission method thereof

Abstract

The invention belongs to a technology of radio frequency identification and particularly relates to a multi-microcontroller radio frequency identification read-write device and a data transmission method thereof. The multi-microcontroller radio frequency identification read-write device comprises a radio frequency transceiving unit group, a microcontroller control unit group, a master micro controller control unit, a stabilized voltage power supply unit, a storage unit, a display unit, a reset unit, a programming unit and an upper computer interface unit. The data transmission method comprises the following steps: the micro controllers are initialized; radio frequency transceiving units send request transmission identifiers after receiving non-repetitive tag data, a passive mode of serial interface data transmission is started if effective chip selection exists; and the master micro controller unit is used for setting data transmission priority according to the request transmission identifiers, setting the chip selection of units corresponding to the highest priority to be low, starting an active mode of the serial interface data transmission, and setting corresponding chip selection to be high and regulating the data transmission priority after the data are uploaded according to an uploading mode. According to the multi-microcontroller radio frequency identification read-write device and the data transmission method, the reading efficiency of the read-write device is greatly improved, and the problem of a great amount of data redundancy in read-write systems is solved.

Description

technical field [0001] The invention belongs to radio frequency identification (RFID, Radio Frequency IDentification) technology, and specifically relates to a multi-microcontroller radio frequency identification reading and writing device and a data transmission method including RFID reader technology. Background technique [0002] RFID technology is a non-contact automatic identification technology. It uses radio frequency electronic equipment to emit radio frequency signals, and through the spatial coupling of radio frequency signals to automatically identify target objects and obtain relevant data, and at the same time, new information can be written into the target object. Identify the device. The RFID system is mainly composed of readers, electronic tags, external terminals, etc., and is generally divided into active systems and passive systems. For example, in an active system, the main function of the reader is to receive the radio frequency signal transmitted by th...

AI Technical Summary

Problems solved by technology

The existing multi-frequency channel reading and writing device uses a microcontroller to directly read the data of multiple RF modules with different frequencies. The "collision" on a single channel still exists, and certain repetitions will inevitably be read in the same RF module. The data may fail to read other module data in time, that is to say, the data of a certain module read by the processor must contain repeated labels, and when the processor finishes reading the RF module, the next module During the data reading task, it is difficult to ensure that the data packets in the next RF module and the data packets read by the module are not repeated, which greatly restricts the "reading efficiency" of the reading and writing device

[0005] In addition, after more in-depth analysis and practice, the number of frequency channels included in this type of read-write device in practical applications is limited by the performance of the main controller and the number of related communication interfaces.

At the same time, a large number of repeated tag data information read by the read-write device, that is, the problem of "data redundancy", has caused a serious waste of system resources, and even if data filtering mechanisms such as "conditional query" are used at the microprocessor level, it will also Causes a certain processing pressure on the microprocessor side

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