Distance measuring and obstacle avoiding device of surveying and mapping unmanned aerial vehicle

The invention discloses a distance measuring and obstacle avoiding device for a surveying and mapping unmanned aerial vehicle. The distance measuring and obstacle avoiding device is characterized by comprising a machine main body; a control module which is installed at the middle side in the machine main body; an induction adjusting assembly which is arranged on the machine main body and located below the control module, and conducts flight obstacle induction through a built-in ultrasonic generator; a gravity center adjusting and obstacle avoiding assembly which is arranged on the machine main body and located below the control module, wherein the gravity center adjusting and obstacle avoiding assembly and the induction adjusting assembly are located at the same horizontal height; and an airflow deviation assembly which is arranged at the side, away from the induction adjusting assembly, of the gravity center adjusting and obstacle avoiding assembly, and assists in changing a flight path of the surveying and