Portable RFID Controlling And Display System Design

The Internet of things works by agreed terms, connect any things with Internet to change and communicate information, and then to achieve intelligent identifying and locating and tracking, supervision and management of a network, which is "object" internet ", while by using RFID, infrared sensors, the global positioning system, the laser scanner for information sensing device.RFID is the core part of The Internet of things, it enlarges and enhances the development and application of The Internet of things.RFID stands for Radio Frequency Identificationmalso radio frequency identification, is a non-contact automatic identification technology,It works by RF signal automatically identifying the target object to obtain relevant data.When it works, it doesn't require manual intervention and can work in a variety of harsh environment.It can identify High-speed moving object and can recognize simultaneously multiple tags, it operates quickly and easily.The basic composition of RFID is tag,reader,antenna.RFID technology has been widely used in areas such as industrial automation, automation and other areas. In these areas, it is mainly connected with the computer, it complete RFID interface applications by special man-machine. And have achieved some simple track, such as food and medicine. The present research is mainly the label on a hardware side, read and write in the light and portable. Software is mainly about the code in fundamental changes and development of computer work to get rid of it.This design uses M8 RFID device that produced by Lingxun Company,it connects with the microcontroller through the serial port line and then display the label number on LCD and LED,it works simplely,fastly,quickly,efficiently.It can work detach from the computer,the feature of identifying data without human intervention expands its areas of application,it can work in a variety of harsh environments.It supplies very good guiding role of enlightenment for modern RFID application.In this essay,the author designs two systems,ont contains RFID and controller and LED,other contains RFID and controller and LCD.Because LCD and LED are portable and have small volume and low cost and can be easily maintained,so can be choosen according real application,it supplies many experience.This paper carries on researching on RFID data display system, aim at data protocol and operation method of M8 and the connection between controller and accessory circuit. Research and design contain: the characteristics of the external circuit to the M8,data protocol,design of software and hardware of controllor,accessory circuit and so on.The system's basic work flow is: reader send a certain frequency RF sign through the transmitting antenna, when the radio card is inside the transmitting antenna area,it generate current, radio frequency card access to energy and is activated. Radio frequency card send out encode information through built-in transmitting antenna. The system receiving antenna receives a signal that is sent from the RF carrier signal,then sent to the reader through the antenna regulator,the reader demodulate and decode signal and then send it to the back of the main system for correlation processing. The main system determine the legitimacy of the card based on logic operations, make the appropriate management and control for different settings, the executing agency issues a directive signal to control action. This paper is mainly to read the tag number and display and write operations.