CN202887233U - Low-power-consumption active radio frequency identification (RFID) tag - Google Patents

Abstract

The utility model provides a low-power-consumption active radio frequency identification (RFID) tag which comprises a radio frequency transceiving module, a master control module, a wireless receiving module and a power module, wherein the master control module is respectively connected with the radio frequency transceiving module, the wireless receiving module and the power module; the power module is also respectively connected with the radio frequency transceiving module and the wireless receiving module. The master control module achieves configuration of the radio frequency transceiving module, processes the transceived information, responds the interruption of a comparator and a timer and rewrites the FLASH contents; the radio frequency transceiving module performs encoding, decoding, transmitting and receiving on signals in a Gaussian minimum shift keying (GMSK) modulation mode; and the wireless receiving module is connected with a comparator interruption port of the master control module, so that the master control module generates interruption and enters an operating state, and the power module is charged through a dual voltage rectifying circuit of the wireless receiving module.

Description

Low-power consumption active RFID label

Technical field

The utility model relates to a kind of active label, especially low-power consumption active RFID label.

Background technology

The battery life of active RFID tag is the bottleneck of its widespread use of restriction always.Behind battery failure, or replacing battery, maybe will block discarded, and battery near the life-span at the end, capacity, voltage drop, the reliability of identification card reduces, the advancing updating of having to, not only can cause certain waste, also may because individual cell lost efficacy in advance, affect the whole system confidence level.

Summary of the invention

In view of above reason, the utility model provides a kind of low-power consumption active RFID label, controls based on MSP430 series super low power consuming single chip processor, and in conjunction with NRF24XX series radio frequency chip, realizes the modulation /demodulation of signal; Label adopts two kinds of mode of operations, has effectively reduced power consumption when guaranteeing normal operation, and can carry out contactless charging to supplying cell.

A kind of low-power consumption active RFID label, comprise radio-frequency (RF) receiving and transmission module, main control module, wireless receiving module, power module, main control module is connected with radio-frequency (RF) receiving and transmission module, wireless receiving module, power module respectively, and power module also is connected with radio-frequency (RF) receiving and transmission module, wireless receiving module respectively.Main control module is realized the configuration to radio-frequency (RF) receiving and transmission module, to the processing of receiving and sending messages, and the response that comparer and timer are interrupted and to the rewriting of FLASH content; Radio-frequency (RF) receiving and transmission module adopts the GMSK modulating mode that signal is carried out encoding and decoding and emission and receives; Wireless receiving module links to each other with main control module comparer interruptive port, main control module is produced interrupt entering duty, and by the voltage doubling rectifing circuit of wireless receiving module power module is charged.

The beneficial effects of the utility model are, have significantly prolonged label serviceable life, have improved the reliability of tag recognition.This label can be widely used in military equipment management and instrument and equipment tracking aspect.

Description of drawings

Fig. 1 is theory diagram of the present utility model.

Embodiment

In Fig. 1, a kind of low-power consumption active RFID label, comprise radio-frequency (RF) receiving and transmission module 1, main control module 2, wireless receiving module 3, power module 4, main control module 2 is connected with radio-frequency (RF) receiving and transmission module 1, wireless receiving module 3, power module 4 respectively, and power module 4 also is connected 3 with radio-frequency (RF) receiving and transmission module 1, wireless receiving module respectively.Main control module 2 is realized the configuration to radio-frequency (RF) receiving and transmission module 1, to the processing of receiving and sending messages, and the response that comparer and timer are interrupted and to the rewriting of FLASH content; Radio-frequency (RF) receiving and transmission module 1 adopts the GMSK modulating mode that signal is carried out encoding and decoding and emission and receives; Wireless receiving module 3 links to each other with main control module 2 comparer interruptive ports, main control module 2 is produced interrupt entering duty, and by the voltage doubling rectifing circuit of wireless receiving module 3 power module 4 is charged.

The Nrf2401 rf chip of radio-frequency (RF) receiving and transmission module 1 usefulness Nordic company, Nrf2401 works in the 2.4GHz ISM band, adopt GMSK modulation mode, the functional modules such as built-in chip type frequency synthesizer, power amplifier, crystal oscillator and modulator, the Nrf2401 energy consumption is very low, with the power emission of-5dBm the time, working current only has 10.5mA, and working current only has 18 mA during reception.Communicate by 3 line SPI patterns and main control module 2, four kinds of mode of operations are arranged: transceiver mode, configuration mode, idle pulley and shutdown mode are determined by PWR_UP, CE and three pins of CS.The design adopts the ShockBurstTM transceiver mode, under this pattern, nRF2401 processes prefix and CRC check code automatically, use the first-in first-out stack area in the sheet, data low speed is sent into from microcontroller, at a high speed (1Mbps) emission, all high speed signals relevant with radio frequency protocol are processed and are all carried out in sheet, like this can be as far as possible energy-conservation, and data aloft the residence time short, anti-interference is high.Main control module 2 is selected the MSP430 series monolithic MSP430F147 of TI company.MSP430 is the single-chip microcomputer series take super low-power consumption as principal feature, the user can be according to CPU and the peripheral module needs to clock, by software control MSP430 clock system, reasonably utilize system resource, realize the super low-power consumption of whole application system.Wireless receiving module 3 is comprised of 125kHz antenna, antenna matching port and voltage doubling rectifing circuit.When the signal that is received by 125 kHz was exported voltage between INT and GND more than or equal to down trigger voltage behind voltage multiplying rectifier, trigger comparator was interrupted, and MSP430 is waken up from low power consumpting state, again entered corresponding dormant state after finishing the work.Simultaneously, when the voltage between INT and GND during greater than 0. 3V, can charge to power module 4 batteries, effectively prolong the life-span of supplying cell.

Claims (1)

1. low-power consumption active RFID label, comprise radio-frequency (RF) receiving and transmission module (1), main control module (2), wireless receiving module (3), power module (4), main control module (2) is connected with radio-frequency (RF) receiving and transmission module (1), wireless receiving module (3), power module (4) respectively, and power module (4) also is connected with radio-frequency (RF) receiving and transmission module (1), wireless receiving module (3) respectively.

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