Estimation of Photosynthetically Active Radiation (PAR) using a low cost spectrometer

A Novel Approach to Obtain PAR with a Multi-Channel Spectral Microsensor, Suitable for Sensor Node Integration

“…This solution lacks the potential to gather data about the light quality and requires a careful choice of the optical filters. Both quantities can be obtained with a spectrometer, as done by Botero et al [14]. However, this approach can not be miniaturized to fit into the desired dimensions and would also exceed a reasonable budget per sensor node.…”

“…The light quality is usually measured with expensive spectrometers that can also be used to determine the PAR [6,14]. However, the nanometer precise data set gathered by these devices is not always needed to obtain information about the light quality and is, therefore, often reduced to the three light regimes of blue, green, and red.…”

Quillaja saponaria Mol. en un escenario de elevada contaminación atmosférica y bajo dos diferentes condiciones de riego

“…El Quillay se caracteriza por tolerar suelos pobres, altas fluctuaciones térmicas y condiciones extremas de sequía (Donoso et al, 2011). La radiación solar en el rango de 400 a 700 nm o fotosintéticamente activa (RFA) excita los pigmentos de especies fotosintetizadoras (Botero et al, 2014). De la radiación que llega a los fotosistemas de la clorofila una parte se utiliza para fotosíntesis (fotoquímica) y otra se disipa en forma de calor.…”

Characterization Of Photodectors Using A Monochromator And A Broadband Light Source In The Xyz Color Space

“…The interest in the study of new applications [18] and the difficulty in taking measurements, which occurs in some cases, have sparked interest in novel models to perform experiments, and to develop light control applications more accurately and at a lower cost. The applications for photodetectors are manifold, the most common are varying photometric measurements [19][20][21], applications where infrared radiation is utilized [22][23][24][25][26] and where color measurement is required [27][28][29][30][31][32][33], intelligent lighting control [19,[34][35][36], the derivation of measures such as CCT (Correlated Color Temperature) [37], the estimation of the CRI (Color Rendering Index) [38] and the determination of power measurements in more particular cases such as PAR (Photosynthetically Active Radiation) [39]. However, the response of low-cost photodetectors is not adjusted to the referred measurements and approximations or transformations are necessary, i.e.…”