Patent ID: 8116928

Claim:
A navigation method using ultrasonic signals and computer vision comprising: Step (A): a user guiding an automatic navigation device to learn and plan a navigation path, wherein said Step (A) further comprises: Step (A1): starting said automatic navigation device to enter a learning mode, and said user standing in front of said automatic navigation device; Step (A2): said automatic navigation device following said user when said user is moving; Step (A3): detecting and recording coordinates and orientation of said automatic navigation device, and using ultrasonic signals and computer vision to detect environments of said automatic navigation device; Step (A4): using computer vision to detect a proportion and a relative position of a face contour, facial features and hair of said user to determine a direction that said user faces toward and then observe whether said user stops to watch an object; if said user is watching an object, executing step (A5) below; if said user does not watch an object, returning to said Step (A2); and Step (A5): said automatic navigation device moving toward a position where said user is located, detecting said object and recording images of said object, and then determining whether to end said learning mode; if yes, using recorded data to plan a navigation track, then shortening length of said navigation track to plan said navigation path according to positions of surrounding barriers of said automatic navigation device and rules of preventing said automatic navigation device from colliding with barriers; if no, returning to said Step (A2); and Step (B): said automatic navigation device navigating independently, using ultrasonic signals and computer vision to detect environments, comparing data of said environments and data of said navigation path to amend a physical movement track.