UAV has become the focus of business and media attention. McNeill Bill, a freelance writer, uses this article to introduce the reader to the basic situation of the UAV and analyze its huge market potential in the future.
And before the traditional sense of the "UAV" is different, and now the UAV is more accurately described as unmanned aerial vehicle (UAVs), which is characterized by the use of data collected to solve the application problem.
A wide variety of UAVs, whether from the size or price. From Northrop's Global Hawk unmanned aerial vehicle ($32, 200000000 hours of battery life) to launch an electric powered aircraft ($40, by the smart phone's Bluetooth control) via a small generator. In the paper, the author focuses on the "production and marketing of a" UAV and the collection of remote sensing information of small aircraft, the price of this kind of aircraft are generally below 5000 dollars, it can provide data for GIS application.
Over the past 15 years, the integration of technology has created a radio controlled aircraft, which has spent more than ten years in the evolution of the aircraft. Clearly, the UAV can fly independently because of the acquisition of GPS signal, and to control the radio control of the aircraft, the pilot needs to establish a visual contact with the aircraft. If the flight is not in line of sight, it is unable to control the plane, because the defect causes the flight range to be within a few hundred yards. The GPS receiver can be added to the UAV, so that the pilot can be free to control the plane without seeing the whole flight path.
After that, WiFi technology is applied to the UAV, which is the first person (FPV). Equipped with WiFi cameras, such as GoPro camera and DJI, Parrot's integrated camera, smart phones or tablet computers will appear real-time flight data flow, that is, even if the aircraft is not in your sight, when it is independent of the time you can see what it is. So the operator can raise or extend the flight route, or even the next flight.
2 composition of UAV
Multi wing UAVs are generally composed of these parts: aircraft, a fixed frame, load or small equipment installed on the fixed frame. None of these components can be called drones.
The fixing frame is a connecting flight vehicle and the loading material, also plays a role, it can reduce the vibration in a large extent, avoid the picture of the "jelly effect". Figure 1 is the DJI company's production of unmanned aerial vehicles, equipped with a ZenmuseH3-D3 balance frame and GoPro camera, as there is a picture of the bracket and the camera.
Below is a Robotics LA100 3D camera with fixed wing UAV and Aviation Lehmann. Fixed wing aircraft in the flight process is very stable and therefore do not need a fixed frame.
Needs to mention is that although the UAV data collection has been commonplace, but to truly realize the function of collecting data is no computer equipped with various payloads. As long as the installation of the application, infrared cameras, high precision air pressure meter, multi spectral scanner, laser radar or high spectral sensors can collect data.
Most of the data is needed to deal with the data processing, the various developers have their own data processing software, providing accurate correction, image mosaic and terrain extraction, etc.. Because the software is also a part of the UAV, so many industry insiders call for the UAV (UAV) was renamed as unmanned aerial vehicle (UAS) system.
3 application of UAV
UAVs are not generated by the new GIS application, but it is lower than the existing methods of data acquisition, the cost is lower, so it can quickly expand the existing GIS application market. In other words, the same is a low altitude flight over the forest to collect data, no chance to drive a plane to a large extent save the cost of the pilot aircraft.
There is a part of the industry can be replaced with unmanned aerial vehicles: remote sensing, air monitoring, oil and gas detection, transmission line monitoring, measurement, film production, precision agriculture, terrain extraction, and the shooting image mosaic, digital image analysis and 3D terrain image analysis.
Figure 2 is a picture of the Skycatch site, is a case of the UAV to collect data.
Figure 2A real-time image monitoring map