| 摘要 |
PURPOSE: An apparatus and a method for guidance of facilities for blind persons are provided to enable the transmission of information about facilities to only users who approach to the corresponding facility. CONSTITUTION: An apparatus for guidance of facilities comprises a controller(110), an ultrasonic sensor(120), a super-directive speaker(130), and a power supply unit(140). The controller controls the entire operation and saves announcement. The ultrasonic sensor comprises a first super-directive horn and senses the access of users according to the control of the controller. The super-directive speaker comprises a second super-directive horn and outputs announcement according to the control of the controller when the access of the user is detected. |
