搜索结果: 1-4 共查到“光学工程 Land”相关记录4条 . 查询时间(0.062 秒)
3D VISUALISATIONS IN SIMULATIONS OF FUTURE LAND USE: EXPLORING THE POSSIBILITIES OF NEW, STANDARD VISUALISATION TOOLS
three-dimensional visualisations visualisation techniques Google Earth
2015/9/28
Three-dimensional visualisations are an interesting method for representing model outcomes. But most visualisation techniques
require expensive software, and a lot of time to create them. When a lar...
LAND-BASED MOBILE LASER SCANNING SYSTEMS: A REVIEW
Land-based Mobile Laser Scanning LiDAR GNSS/INS Multi-sensor system Road inspection Urban Mapping
2014/6/5
Mobile mapping has been using various photogrammetric techniques for many years. In recent years, there has been an increase in the number of mobile mapping systems using laser scanners available in t...
Spectral Reflectance Characteristics of Different Snow and Snow-Covered Land Surface Objects and Mixed Spectrum Fitting
Snow Snow-covered land surface object Spectral characteristics Spectral fitting
2012/4/17
The field spectroradiometer was used to measure spectra of different snow and snow-covered land surface objects in Beijing area. The result showed that for a pure snow spectrum, the snow reflectance p...
激光控制平地系统激光接收器设计与试验（Laser Receiver Used for Laser-controlled Land Leveling System）
激光平地 激光接收器 前置放大电路
2009/11/3
激光接收器是激光控制平地系统的关键部分。为了更有效地检测激光信号，扩大接收范围，增加接收距离，提高稳定性和抗干扰性，设计了一种基于集成IC的新型激光接收器。其原理是以红色有机玻璃作为透光窗口，并采用干涉型滤光片来滤除背景光；以硅光电池作为光电探测器，将激光信号转换为电信号；然后采用集成运算放大器设计低噪声前置放大器和主放大器对微弱电信号进行放大；最后，脉冲整形和展宽电路实现脉冲信号到TTL数字信号...