Vegetation detection dual-channel fluorescence and laser radar system

Abstract

The invention provides a vegetation detection dual-channel fluorescence and laser radar system. The system comprises a laser emission unit, a ranging unit, a scanning unit, a receiving detection unitand a sequential control unit; the laser emission unit emits the ultraviolet laser which is used as the exciting light of the vegetation fluorescence and the ranging laser of the ranging unit at the same time; the laser emission unit produces the ultraviolet which is emitted by the scanning unit; the receiving detection unit separately outputs the ultraviolet laser echo to the ranging unit and processes a fluorescence signal by itself; the receiving detection unit realizes optical focusing by adopting an optical telescope, separates the ultraviolet laser echo by adopting a dichroic lens, and transmits the fluorescence signal; the ultraviolet laser echo and the fluorescence signal respectively enter a photoelectric detector corresponding to two vegetation characteristic wavebands through anoptical splitting module after being coupled through an optical fiber coupling. The dual-channel fluorescence and laser radar system provided by the invention supports the synchronous acquisition ofthe laser point cloud space information and the fluorescence dual-channel information of the vegetation target, and the integrated monitoring on the vegetation space structure and the physiological status is accomplished.

Description

technical field [0001] The invention belongs to the technical field of surveying and mapping remote sensing, in particular to a dual-channel fluorescent laser radar system for vegetation detection. Background technique [0002] Lidar technology has outstanding advantages in the field of earth observation, especially in the rapid detection of three-dimensional spatial structure of vegetation. Point cloud data formed by lidar echo signals can provide spatial distribution information of vegetation, but limited to a single wavelength, it is difficult to obtain the spectral characteristics of vegetation. [0003] The application of active laser-induced fluorescence technology on vegetation can produce fluorescence characteristic peaks, and the generation of fluorescence comes from the radiative energy level transition of photosynthetic sites inside vegetation. As an important physiological activity of vegetation, photosynthesis of vegetation is closely related to its physiologic...

AI Technical Summary

Problems solved by technology

[0004] However, the current detection and imaging of plant fluorescence signals cannot explain the distribution of fluorescence signals in the form of point clouds, that is, the advantages of laser radar space detection and fluorescence spectroscopy have not been combined.

Images