Active radio frequency identification (RFID) sensing tag with low power consumption and control method thereof

Abstract

The invention relates to an active radio frequency identification (RFID) sensing tag with low power consumption and a control method thereof. The active RFID sensing tag comprises a control unit (1), a radio frequency transceiver unit (3), an antenna unit (4), a storage unit (5), a power unit (7) and a power management unit (8), and is characterized by further comprising a sensing unit (2), wherein the sensing unit (2) is connected with the control unit (1) by an inter-integrated circuit (I<2>C) interface to realize data exchange between the sensing unit (2) and the control unit (1); the power unit (7) is connected with the control unit (1) and the radio frequency transceiver unit (3) to supply power to the control unit (1) and the radio frequency transceiver unit (3) respectively; and the power management unit (8) is connected with the control unit (1) and the sensing unit (1) to manage power supplied by the power unit (7) under the control of the control unit (1) so as to selectively supply the power to the sensing unit. The invention has the advantage of effectively reducing the power consumption of the active RFID sensing tag.

Description

technical field [0001] The invention belongs to the field of radio frequency identification (Radio Frequency Identification, RFID) technology, and in particular relates to an active RFID sensor tag capable of detecting the temperature and / or humidity of an environment where a product is located and a control method thereof. Background technique [0002] RFID technology is an automatic identification technology developed in the 1980s. Automatically identify the ID of a target through radio frequency signals to obtain object information and obtain relevant data. Different from traditional magnetic cards and IC cards, RFID technology solves the two major problems of passive and non-contact. At the same time, it can realize moving target recognition and multi-target recognition, and can be widely used in various occasions. Its outstanding advantages are strong environmental adaptability, ability to penetrate non-metallic materials, large data storage capacity, and strong anti-i...

AI Technical Summary

Problems solved by technology

However, this solution still has the following disadvantages: 1. The power consumption is relatively high, because the sending current is 27mA, the activation current is 15mA, and the sleep current is still high at 0.01mA

2. The cost of the radio frequency transceiver chip of this solution is high. This is because the radio frequency transceiver chip integrates the 8051 single-chip microcomputer core, and the price is much higher than that of a chip with only radio frequency transceiver function.

3. Cannot recognize the power of the active RFID tag, especially when the battery of the active RFID tag is low, it cannot effectively remind the reader

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