Travel assistant system for visually impaired persons and control method thereof

The invention discloses a travel assistant system for visually impaired persons and a control method thereof. The system comprises a hand-held intelligent terminal and a vehicle tag for uniquely identifying a bus. The hand-held intelligent terminal is equipped with a nine-palace key module, and the nine-palace key module is equipped with braille; the hand-held intelligent terminal is internally equipped with a control module, a first communication module, an attitude sensor and a dual-frequency-band positioning module; the control module is connected with the nine-palace key module, the firstcommunication module, the attitude sensor and the dual-frequency-band positioning module, and the first communication module is connected with the vehicle tag wirelessly; the vehicle tag is used for broadcasting vehicle information of the bus; the control module is used for reading the vehicle information of the bus, and informing the visually impaired person of the corresponding bus stop information. The system is more c