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Control of the UV radiation sources for a weathering apparatus on the basis of the averaged radiation intensity

  • US 7,544,948 B2
  • Filed: 08/03/2005
  • Issued: 06/09/2009
  • Est. Priority Date: 08/03/2004
  • Status: Active Grant
First Claim
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1. Method for controlling the UV radiation sources in a weathering apparatus, comprisingproviding a plurality of UV radiation sensors each arranged for measuring the radiation power of one of the radiation sources, wherein the number of the UV radiation sensors is the same as the number of the UV radiation sources;

  • measuring radiation power of each of the radiation sources in a predetermined spectral range of the radiation emitted from the radiation sources, with the spectral range being chosen such that the measured radiation power is representative of the radiation power in the UV,calculating an averaged radiation power from the measured radiation powers by summing the radiation powers of all radiation sources measured by the respective radiation sensors and dividing the sum by the number of the radiation sources, andcontrolling the electrical power to be supplied to the radiation sources in accordance with the averaged radiation power.

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