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How It Works

Measurement Principle TA-Sensor

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TA-Principle V01

The sensor is used to measure the relative position of a solar tracker with respect to the sun (or another light source). The sensor is installed therefore in the same plane that the solar modules are installed.

Black Photon Instrument's tracking accuracy sensor consists of a lens that images the sun on a sensor chip. A filter stack controlls the light intensity and the wavelength range that is used for imaging. During the measurement, the sensor is fixed on the tracker plane. A relative movement between the sun and the tracker leads to a lateral movement of the focus point, which generates a difference signal in the sensor chip. The signal generated by the sensor chip is amplified by build-in analog electronic circuits to provide analog voltage signals that can be recorded by a standard data logger or a remote monitoring platform. 

Using two sensors at different locations on the tracker plane, the deformation of the tracker plane (e.g. due to the weight of the modules or wind load) can be measured. 

Accuracy, repeatability and stability are very important in sensor equipment. Read about how Black Photon Instruments TA1 has been tested in the conference presentation at the CPV-8 Conference in Toledo, Spain, from April 16-18th 2012. 

Download file Download preprint

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Last Updated on Friday, 26 October 2012 08:25