盲人出行问题一直困扰着盲人的一生,如何安全准确地帮助盲人安全准确地到达目的地?本系统目的在于提供一种基于RFID的手持式盲人导航系统,旨在解决现有的盲人导航系统不能够准确、安全的为盲人导航的问题。利用物联网平台下的RFID技术,将道路存储在电子标签,再转换成相应的语音提示信息,从而实现为盲人提供精确,安全的导航,解决盲人的出行问题。
本文论述了以PXA270为主控模块、以RFID为核心技术、以物联网为平台的手持式盲人导航系统。该系统针对盲人出行不便而研发的一款协助盲人能自行方便到达目的地的综合系统。该系统集RFID导航、盲人输入法、智能路况识别、外部数据采集、语音提示、手机、无线传输、全球定位等功能于一体。
本文主要论述了基于RFID的盲人导航系统手持终端设计与实现,其主要包括在主控平台上的盲人键盘的设计,语音提示,手机功能实现。整个系统包含多个处理器,在主控模块的控制下并行高效的工作。软件系统基于Linux操作系统,采用多线程的编程模式,确保了系统的实时性和可靠性。
关键词:物联网 RFID 盲人导航 PXA270
Blind navigation system based on RFID handset
design and implementation
ABSTRACT
Travel has been plagued by blind blind life, how to safely and accurately to help blind people reach their destinations safely and accurately? The system aims to provide a hand held RFID-based navigation system for the blind, blind to resolve the existing navigation systems can not accurately and safe for the blind navigation problems. Things platform using the RFID technology, the road is stored in the electronic tags, converted to the corresponding voice message in order to achieve for the blind to provide accurate and safe navigation, to solve the blind travel problems. This article discusses the PXA270 as the main control module to RFID as a core technology platform of things as hand-held navigation system for the blind. The system is inconvenient for the blind developed for a trip to help the blind to its own comprehensive system for easy access to the destination. The system combines RFID navigation, blind input, intelligent traffic identification, external data acquisition, voice prompts, phone, wireless transmission, global positioning and other functions. This article discusses the blind navigation system based on RFID handset design and implementation, and its main host platforms, including the blind in the design of the keyboard, voice prompts, phone functions to achieve. The system contains multiple processors, in parallel under the control of main control module and efficient work. Software system based on Linux operating system, using multi-threaded programming model to ensure that the system of real-time and reliability
Key words:Internet of Things RFID Blind Navigation PXA270