Research on Simulation Software Based on Ritldi Emulator--Prototyp-er

Radio Frequency Identification (Radio Frequency IdenTIficaTIon, RFID) technology, as the basis for high-tech and information standardization for fast, real-time and accurate information collection and processing, has been recognized as one of the ten important technologies of this century.

This topic mainly describes the simulation application of radio frequency identification (RFID) in the simulation software Rifidi. RFID is a new type of automatic identification technology with many advantages. However, due to the installation process of radio frequency identification (RFID) readers and antennas, implementers sometimes have to rack their brains to meet rate requirements and repeatedly debug various solutions to achieve the best reading results. In addition, even if the implementer has designed an installation plan and debugged successfully, it is still unknown how much the solution plays in practical applications. Once the actual application needs are not met, the "rollback" brought by the adjustment plan is adjusted. Not only will it take a lot of manpower and material resources, it is more likely to return the test work to the "origin".

For this purpose, an interesting tool, Rifidi, can be used to quickly evaluate the application of many different system configurations and scenarios, while at the same time obtaining more information from each analysis than physical testing can provide. . The basic idea is to simulate the performance of RFID readers and tags and the operation of actual production lines in a simulated environment that is modeled entirely on readers and tag installation environments. By predicting the echo rate and return loss of RFID tags and readers in the actual working environment, predicting the blockage and operating efficiency of the production line, engineers can easily and quickly estimate various design parameters to determine the RFID reading speed and Efficiency issues and the root cause of blockage in the production line. Therefore, this project designed a new RFID-based sensing application platform, a virtual clerk, and simulated a business process that can be operated in a real company by using Rifidi simulation software.

1 Introduction to RFID

1.1 RFID system components

The simplest RFID system is generally composed of a reader (Reader) and a tag (Tag). The tag is placed on the identified object; the reader can be a read or write/read device, depending on the structure and technique used. A channel for transmitting electromagnetic waves between the RF tag and the reader through the antenna. The process of occurrence in a spatial transmission channel can be attributed to three event models. For data exchange purposes, timing is the implementation of data exchange, and energy is the basis for timing.

1.2 RFID system classification

1) Low frequency (9 to 135 kHz) according to the signal band: The system using this band has a disadvantage, and the reading distance is only a few centimeters. However, since the signal in this frequency band can penetrate the high-humidity environment in animals, it is applied to animal identification.

High frequency (13.56 MHz): This is an open frequency band with a reading distance of up to 1 to 1.5 m and a write distance of up to 1 m.

Ultra High Frequency (300 MHz to 1.2 GHz): Labels and readers in this band have the longest effective communication distance in the air.

Microwave (2.45~5.2 GHz): The advantage of this frequency band is that it is less interfered by various strong electromagnetic fields (such as motors, welding systems, etc.), and the recognition distance is between high frequency and ultra high frequency systems. And the label can be designed to be small, but at a higher cost.

2) Classification by label The label can be obtained by generating an induced magnetic field from a radio signal emitted by the reader, or by a built-in battery. The former is called a passive tag and the latter is an active tag. Passive labels range from a few centimeters to 10 m, while active labels can read from 1 to 200 m.

2 Introduction of RFID simulation software Rifidi

Rifidi is a complete middleware platform built on all aspects of RFID. Linked to industry-leading prototyping tools and advanced RFID middleware servers, Rifidi can turn your RFID design into real-world applications. The Rifidi platform consists primarily of two different components, a prototype-focused design, a product-focused application development and deployment planning.

The Rifidi Toolkit is an Eclipse-based integrated circuit device designed to mimic and simulate RFID hardware and RFID events in the Rifidi environment. With this toolkit we can build a virtual RFID environment with the same readers, tags and events in a real environment.

Rifidi Edge is a powerful middleware platform for developing and deploying RFID applications. Rifidi Edge provides the convenience of RFID's interaction with other sensor devices and provides a standard engine called Esper (a component for complex event processing and event stream processing applications) that has been customized for RFID data processing. . Building a lightweight, modularly deployed server platform called Equinox OSGI, Rifidi Edge provides you with a powerful business application environment that enables communication between RFID hardware and RFID data processing.

The Rifidi Toolkit is a suite of products for building RFID-oriented prototypes. At the heart of the Rifidi toolkit is a simulation engine that simulates the RFID reader's communication protocol and tag reading. The Rifidi toolkit is a combination of a simulation engine and three different software to help implement a complete RFID prototype.

The Rifidi toolkit consists of the following three parts: Emulator, Designer, and Tag Streamer.

Emulator: Rifidi Emultor is the core development tool for the Rifidi toolkit. It emulates readers and tags and is well connected to the hardware. It also integrates a scripting engine to create 3D scenes for tag and tag reading.

Designer: Rifidi Designer is a custom presentation tool based on the simulation engine that provides rich 3D scenes for presentations.

Tag Streamer: The Rifidi Tag streamer is a load testing tool that allows you to generate a large number of virtual readers and tags to test your RFID system.

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