基于障碍物联合探测的智能导航手杖研究

Study on Intelligent Navigation Cane Based on Combined Detection of Obstacles

针对当前视障人士导航手杖功能单一、安全性不高、不易使用的迫切问题,设计了一种具备障碍物联合探测与智能导航的手杖及其应用方法。手杖包括:手杖柱体部分、手柄部分。手杖柱体的上部设有全景摄像头、前方声波探头、左方声波探头和右方声波探头,形成手杖的声波与摄像探测能力,手杖柱体的上部外设有橡胶保护套;手柄设有手杖电源开关、蓝牙耳机开关、扬声器、紧急救援开关、全景摄像头开关、前方声波探头开关、左右声波探头开关,内设有手杖电池仓。本设计根据声波探测回波原理和图像自动识别技术,预设视障人士行进路线上的地物地图,通过探测障碍物与预设地图匹配,以识别视障人士行进路线上的障碍物和潜在危险,实现了声波、摄像和地物地图多种方式进行相互验证和联合导航,克服了单一方式对障碍物探测与识别存在盲区的不足,为视障人士提供了更加安全的导航保障。

Aiming at the pressing problem that the current navigation cane for visually impaired is of single function, low safety, and inconvenient to use, a cane with combined detection of obstacles and intelligent navigation and its application method are designed. The cane includes： a cane stick portion and a handle portion. The upper part of the cane stick is equipped with a panoramic camera, a front sound detector, a left sound detector and a right sound detector, to form the capabilities of sound and camera detection of the cane. And the upper part of the cane stick is provided with a rubber protective sleeve outside. The handle is equipped with a power switch, a Bluetooth headset switch, a speaker, an emergency switch, a panoramic camera switch, a front sound detector switch, and left and right sound detector switches of the cane. And the handle is provided with a battery compartment of the cane. Based on the principle of acoustic echo sounding and automatic image recognition technology, the design presets feature maps on the route of the visually impaired, and matches obstacles with the preset feature maps, in order to identify obstacles and potential dangers on the route of visually impaired. The design realizes the mutual verification and combined navigation of multiple ways, including sounds, cameras and feature maps, and overcomes the insufficiency of blind areas in obstacle detection and recognition of the single way, and provide safer navigation protection for visually impaired.