【作者】 陈晓燕；

【导师】 赵晓军；

【作者基本信息】 河北大学 ， 检测技术与自动化装置， 2019， 硕士

【摘要】 随着经济的发展,交通越来越便利。然而复杂的路况会对盲人的出行带来很大不便。盲人在行走的过程中除了自身的安全,更多地了解周围环境的信息也非常重要。为了使盲人更多地得到环境的信息,也为了让家人方便地了解盲人行走的路径,本文设计了具有环境识别和路径观看功能的导盲杖。本文导盲杖的设计采用高集成度的STM32F103芯片作为核心控制器。导盲杖应用射频识别技术实现环境识别、局部导航的功能。盲人行走的时候可以通过导盲杖底部的读卡器与盲道上电子标签的数据传输,得到环境的信息。包括盲人所在街道、周围标志性建筑、是否有十字路口、是否有台阶等信息。为了将环境的信息更好的反馈给盲人,加入了语音芯片SYN6288,该芯片可以实现文本转语音的功能。环境的信息是以文字的形式存储在导盲杖核心控制器中,导盲杖通过识别盲人所在位置电子标签的内容,播放对应的环境信息。因此盲人在行走的过程中就可以听到环境的信息,通过听觉来弥补视觉上的不足。为了使盲人更加的独立,同时考虑到盲人经常活动的范围有限,导盲杖通过射频识别技术实现对盲人局部区域导航的功能。在导盲杖上加入了经过改造的指南针,以此帮助盲人辨别方向。盲人独自外出的时候,为了让家人更多的了解到盲人的位置,导盲杖实现了路径查看的功能。家人可以通过OneNET中国移动互联网开放平台查看盲人实时位置、查询历史路径。实现这一功能用的硬件是SIM868模块。该模块不仅可以实现GPS定位,还具有GPRS、GSM功能。通过硬件软件的结合,实现路径观看的功能。在模块上加入一张开通GPRS功能的中国移动SIM卡。当SIM868模块收到来自空间卫星系统的经度、纬度、时间等信息时,核心控制器通过解析、连接OneNET服务器、调用OneNET路径显示API、发送设备ID、发送APIKey把经度、纬度等信息上传到OneNET中国移动互联网开放平台,以此实现路径查看的功能。考虑到盲人使用手机有很大的不便,为了盲人在紧急的情况下可以简单快速的拨打家人电话,在导盲杖上添加了一键拨打电话的功能。通过核心控制器向SIM868模块发送相应的指令,当盲人按下按键时就会拨通存入在核心控制器的电话。本文设计的导盲杖实现了环境识别的功能,具有路径查看、一键拨打电话等功能。更多还原

【Abstract】 With the development of economy,transportation becomes more and more convenient.However,the complicated road conditions will bring great inconvenience to the blind.In addition to their own safety,it is also very important for blind people to know more about their surroundings.In order to make the blind get more information about the environment and let their families know the path of the blind,this paper designs a guide wand with the function of environment recognition and path viewing.In this paper,the design of the guide wand uses STM32F103 chip with high integration as the core controller.Radio Frequency Identification(RFID)technology is used to realize the function of environment identification and local navigation.When the blind walk,they can get the information of the environment through the card reader at the bottom of the guide stick and the data transmission of the electronic tag on the blind path.It includes information about the streets where blind people live,the surrounding landmarks,whether there are intersections,steps and so on.In order to better feedback the information of the environment to the blind,the voice chip SYN6288 is added,which can realize the function of text to voice.The environmental information is stored in the core controller of the guide wand in the form of text.The guide wand plays the corresponding environmental information by identifying the content of the electronic tag of the blind person’s location.Therefore,the blind can hear the information of the environment in the process of walking,and make up for the lack of vision through hearing.In order to make the blind more independent,and considering the limited range of the blind people’s regular activities,the guided wand realizes the function of local navigation for the blind through radio frequency identification technology.A modified guide is added to the guide stick to help the blind to identify the direction.When the blind go out alone,in order to let the family know more about the location of the blind,the guide wand realizes the function of path viewing.Families can view blind people’s real-time location and query historical path through OneNET China Mobile Internet Open Platform.The hardware used to realize this function is SIM868 module.This module not only can realize GPS positioning,but also has GPRS and GSM functions.Through the combination of hardware and software,the function of path viewing is realized.Add a SIM card with GPRS function to the module.When the SIM868 module receives the longitude,latitude and time information from the space satellite system,the core controller uploads the longitude and latitude information to OneNET China Mobile Internet Open Platform by parsing,connecting OneNET server,calling OneNET path to display API,sending device ID,and sending APIKey,so as to realize the function of path viewing.Considering the great inconvenience of using mobile phones for the blind,in order to make the family phone call easily and quickly in emergency,a button dialing function is added to the guide stick.The core controller sends corresponding instructions to the SIM868 module.When the blind press the button,the phone stored in the core controller will be dialed.The guide wand designed in this paper realizes the function of environment recognition,and has the function of path checking and one-click dialing.更多还原