多功能智能盲人导航系统的仿真与实验研究

Simulation and Experimental Research of Multifunctional&Intelligent Navigation System for Blind

为解决盲人群体出行困难,规避其户外危险,设计一款基于STM32F103C8T6的多功能智能盲人导航系统。该系统采用HC_SR04超声波模块测距避障,利用GPS/BDS导航模块快速准确定位,通过WT588D进行语音提示,并发送求救信号到监护人手机,确保盲人出行安全。通过ADXL345传感器测试运动步数,附加防摔倒提醒功能;利用ADS1292R和TMP275分别监测盲人心率和体温参数;利用NFC卡可向路人提供盲人个人信息及健康状态,以获得精准救助;最后,通过语音播报和OLED显示,定时向盲人及其监护人提供其健康状态。仿真与实验结果表明,该系统可实现6 m内提醒避障,身体倾斜超过阈值角度时进行防摔倒提醒,以及向监护人发送寻求帮助信息和位置信息;心率、体温和计步数据与实际结果高度相符,其中体温测试误差不超过0.1℃。

To avoid inconveniences and accidents for blind people in their outdoor activities,a multi-functional intelligent blind navigation system is designed based on STM32F103C8T6.It adopts HC_SR04 ultrasonic module to measure distances and make positioning quickly and accurately through GPS/BDS navigation module.With voice prompts made by WT588D,it transmits distress signal to the guardian,ensuring travel safety for the blind.Its function of counting steps and reminding anti-fall are realized by the ADXL345 sensor.It detects the heart rate and body temperature by employing ADS1292R and TMP275.Finally,voice broadcast and OLED display provide health status regularly.The simulation and experimental results showed that,the system can issue an alert to avoid obstacles within 6 meters and against falling when body tilt exceeds the threshold angle.It could sends location information to the guardian for requesting help.The data of heart rate,body temperature and walking steps are highly consistent with actual results.The temperature test error is not more than 0.1℃.