Abstract: The modern society is full of skyscrapers and traffic developed，but for the blind everywhere is filled with obstacles which brings inconvenience for the blind's travel，traveling safety for blind people gradually become the focus of attention. The purpose of this navigation glasses is to assist the blind to travel，by designing two sets of ultrasonic distance measurement system to help the blind avoid obstacles in time. The data are obtained by ultrasonic measurement related algorithm which can get three aspects information about the distance，speed and direction of the obstacles to inform the blind in the form of vibration and achieve the effect of navigating to the blind. The glasses have the following characteristics: simple structure，easy operation，high integration，good accuracy，low power consumption，low cost and broad market prospects.

Key words: blind navigation, glasses, ultrasonic, vibration