The Smart RFID Sensor Design and Localization with RFID Technology
Date Issued
2007
Date
2007
Author(s)
Huang, Yu-Hao
DOI
en-US
Abstract
This thesis mainly consists of two parts. First part is the design of Smart RFID sensor chip. Second is the integration of RFID localization systems.
The chip combines the CMOS RF circuit with the gyroscope sensor, which is manufactured with CMOS MEMS to provide the smart RFID sensor of a single chip. The gyroscope sensor is used for measuring physical quantity of linear and angular acceleration. In order to achieve the power-saving objective, the RF circuit is designed with the semi-active tag, that is, a power source is built in the RFID tag which is normally suspended. In addition, the tag is activated by RF signal only when it approaches a reader. The semi-active tag has lower power consumption than active tag, and longer distance than passive tag.
In this research, a localization sensing system with RFID technology is constructed. First, a smart RFID sensor module is developed and obtained an uncertainty model of the sensor module through experiments. Then, this research utilizes RSSI function of the module to get the measurement of distance and estimate the position of target tag using a probabilistic methodology. The module equipped with a gyroscope sensor can demonstrate the architecture of our chip. Through RF signals, the data are delivered to remote systems. Further, this research can apply the system on robot localization and monitoring systems of solitaries.
The RF circuit is manufactured by TSMC CMOS 0.18um process. The RFID localization system is realized using the cc2500 RF module by Chipcon, 8051 microcontroller, and the gyroscope sensor.
The chip combines the CMOS RF circuit with the gyroscope sensor, which is manufactured with CMOS MEMS to provide the smart RFID sensor of a single chip. The gyroscope sensor is used for measuring physical quantity of linear and angular acceleration. In order to achieve the power-saving objective, the RF circuit is designed with the semi-active tag, that is, a power source is built in the RFID tag which is normally suspended. In addition, the tag is activated by RF signal only when it approaches a reader. The semi-active tag has lower power consumption than active tag, and longer distance than passive tag.
In this research, a localization sensing system with RFID technology is constructed. First, a smart RFID sensor module is developed and obtained an uncertainty model of the sensor module through experiments. Then, this research utilizes RSSI function of the module to get the measurement of distance and estimate the position of target tag using a probabilistic methodology. The module equipped with a gyroscope sensor can demonstrate the architecture of our chip. Through RF signals, the data are delivered to remote systems. Further, this research can apply the system on robot localization and monitoring systems of solitaries.
The RF circuit is manufactured by TSMC CMOS 0.18um process. The RFID localization system is realized using the cc2500 RF module by Chipcon, 8051 microcontroller, and the gyroscope sensor.
Subjects
RFID感測器
RFID 定位
RSSI
半主動標籤
RFID Sensor
RFID Localization
Semi-active Tag
Type
thesis
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