Instrument introduction
The canopy image analyzer can measure: leaf area index, average blade inclination, scattered radiation transmittance, direct radiation transmittance at different solar elevation angles, extinction coefficient at different solar elevation angles, and orientation of leaf area density. Distribution, photosynthetically active radiation (PAR) inside and outside the canopy, etc. It is widely used in the measurement and analysis of canopy light receiving conditions of crops and plant populations as well as agricultural and forestry scientific research work.
Instrument use
Leaf area index (LAI) and photosynthetically active radiation fraction (FPAR) of plant canopy absorption are important biophysical parameters in ecology and climatology. These parameters are widely used in the fields of ecology and climatology. The TRAC plant canopy analyzer uses a unique and innovative technique to measure the photosynthetically active radiation component absorbed by the plant canopy along the cross section under the canopy, and then convert it into a gap proportion distribution to calculate the leaf area index and other parameters. .
Principle of operation
1. Any substance has the characteristics of emitting, absorbing and reflecting electromagnetic waves, which is the basic principle of spectral information detection. By measuring the absorption, transmission or reflection of each wavelength of radiation, the properties of the substance can be determined. In practical applications, only certain specific bands need to be selected to identify the characteristics of the selected substance. A narrow band filter is used to select certain bands of the visible and near infrared (NIR) region electromagnetic spectrum. This band region can be used to quantify differences in plant canopal emissivity caused by various stresses. The severity of leaf disease is very useful. The long-wavelength band in the near-infrared region can be used to estimate the biochemical composition of plants.
2. Using visible/near-infrared light reflectance spectroscopy and multi-channel spectral information scanning technology, vegetation surface parameters, plant canopy information, plant nutrient information, soil nutrient information, environmental parameters, plant pests and diseases can be quickly determined.
3. The instrument is an 8-channel universal spectrum detection analyzer. It can support up to 16 channels of common spectrum information acquisition instruments in different bands. Users can customize the spectrum of different bands according to the actual needs.
4. The instrument comes with 8 bands of filters.
5. Built-in sensor automatic correction module.
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