This creation mainly provides a kind of application ultrasonic to assist person visually impaired to sense what front obstacle in effective coverage and with warning； The ultrasonic guide hat its be one cap of what tool be equipped with a ultrasonic emitter,At least three ultrasonic receivers,One controller and at least a loudspeaker； Wherein,The ultrasonic emitter is arranged what cap and has leading edge,And ultrasonic receiver system is respectively set on what cap tool,The echo of the emitted wave frequency of ultrasonic emitter is detected by ultrasonic receiver,And by the controller operation echo time and with alarm obstruction object range-azimuth person,And loudspeaker makes a sound power,With the distance of alarm obstruction object,Preceding object object is detected in order to reaching,Helping what prevents collision injured,To ensure safety when blind person walking.本創作主要提供一種應用超音波以協助視障者對於前方障礙物在有效區域內進行感測並以警示；所述超音波導盲帽其係於一帽具設有一超音波發射器、至少三超音波接收器、一控制器及至少一揚聲器；其中，該超音波發射器設置於帽具前緣，而超音波接收器係分別設置於帽具上，藉由超音波接收器偵測到超音波發射器所發射波頻的回波，且由控制器運算回波時間並以警示障礙物距離與方位者，而揚聲器發出聲音強弱，以警示障礙物的距離遠近，俾達偵測前方障礙物體，有助於防止碰撞受傷，以保障盲者行走時的安全。
