Limited space internal gas detection device and method

The invention relates to a limited space internal gas detection device and method.The limited space internal gas detection device is constructed through a quadrocopter, an infrared range finder, an inertia measurement unit, a camera, a pumping type gas detection alarm unit and a handle, the handle controls the quadrocopter through wireless communication, and the quadrocopter is connected with the infrared range finder. The infrared range finder, the inertial measurement unit, the camera and the pumping type gas detection alarm unit are mounted on the quadrotor. According to the invention, by planning the flight path of the unmanned aerial vehicle in the limited space, the composition of the gas in the limited space is detected, and the unmanned aerial vehicle can stir the gas in the space in the flight process, so that the problem that detection cannot be carried out by a traditional detection mode due to design dead angles in the space is avoided; the safety of limited space gas detection can be improved. 本发