KEYWORDS: Ultraviolet radiation, Ultraviolet detectors, Sensors, Signal processing, Sun, Particle filters, Solar radiation, Optical amplifiers, Signal detection, Control systems
In order to autotrack the object and detect the solar UV index, a reliable real-time high-precise instrument is proposed in
this paper. This instrument involves two subsystems: the autotrack and detecting modules. The autotrack module consists
of four-quadrant photo detector, multi-channel signal processing circuit and precise stepping system. The detecting
module designed for dada measurement and acquisition is made up of the ultraviolet sensor UV460 and high precision
A/D converter MAX1162. The key component of the entire instrument is ultralow-power microprocessor MSP430 which
is used for entire system controlling and data processing. The lower system of autotracking and measurement is
communicated with upper PC computer by RS232 module. In the experiment, the tracking precision of two-dimensional
motion revolving stage is calibrated to be less than 0.05°. Experimental results indicate that the system designed could
realize the precise autotracking and detecting function well, and the measure precision of system has reached the
desirable target.
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