With the continuous appearance of sensors, the performance of unmanned aerial vehicle (UAV) has been continuously improved, and its application scope and application field have expanded rapidly. There are hundreds of UAVs with different uses and performance indicators in the world. The battery life is extended from one hour to dozens of hours, and the task load is from several kilograms to several hundred kilograms, which provides a guarantee for long-term and large-scale remote sensing monitoring, and also creates favorable conditions for carrying a variety of sensors and performing a variety of tasks.
Sensors have developed from early film cameras to large-area digital arrays. 20 1 1 domestic digital aerial camera has more than 80 million pixels, and can take high-precision aerial photos in color, infrared and panchromatic at the same time. China Institute of Surveying and Mapping took photos with several Hasselblad cameras, and then spliced them with the developed software, which effectively improved the flight efficiency of remote sensing. The 22-megapixel professional camera launched by Germany's Lulai Company is equipped with a camera pan/tilt that can automatically keep horizontal and correct deflection, and the corresponding mapping software has been developed. In addition, small high-precision remote sensors such as laser 3d scanner and infrared scanner provide development space for UAV remote sensing applications.
UAV remote sensing can quickly update, modify and upgrade geological environment information and outdated GIS database. Provide timely technical support for the administration, land and geological environment management of the government and relevant departments.
With the gradual deepening of China's reform and opening up and the rapid development of economic construction, great changes have taken place in the landforms of various regions. The existing aerial remote sensing technology can no longer meet the needs of economic development. The new remote sensing technology serves the growing economic construction and cultural undertakings. The technology of using UAV as aerial remote sensing platform is a new application technology developed in response to this demand, which can better meet the needs of aerial remote sensing business in China at this stage and update the old geographical data.
With the development of China's economic and cultural construction, many ancient buildings, archaeological discoveries, field archaeological exploration and urban and rural landforms have undergone tremendous changes. Some maps can't reflect the new look.
The data used is relatively old. Conventional surveying and mapping cycle can no longer meet the needs. Using UAV remote sensing aerial photography technology to update geographic data has played a positive role in promoting regional economic construction.
Newly discovered historical sites, newly built streets, bridges, airports, stations and comprehensive information on land and resource utilization in this area. Remote sensing aerial photography technology of UAV is a new application technology of optimizing combination of various advanced means.
UAV remote sensing aerial technology takes low-speed UAV as aerial remote sensing platform, and uses color, black and white, infrared and camera technology to shoot aerial image data. Image information is processed by computer. The whole system has outstanding characteristics in design and optimization combination, and it is a new application technology integrating remote sensing, remote control, telemetry technology and computer technology.