Research of the Guide Based on the Process of the Ultrasonic Characteristic Signal
ZHAI Jiawen;WANG Maosen;Nanjing University of Science and Technology;
The sonar system consists of four parts: the sonar head module,DSP control module,audio output module and power supply module. The ultrasonic generator sends out the ultrasonic waves. When the sonar receiver caught the echo,CPU will extract the features of the echo and process the features,which can not only filter the high frequency noises caused by the surrounding envrionment,but can also uses the algorithm of sigal reconstruction to retain most of the features of the original signal and properly amplified them. So that when the system measures the distance between itself and the obstacle,it can also identify the obstacle according to its shape. The maximum detection distance of the system is 8 meters,and it can distinguish the nuances of objects. It has the high accuracy and good stability,which can meet the basic requirements for blind navigation.
【CateGory Index】： TB559;TN911.7