| 摘要 |
Solar radiation is concentrated onto an absorber which includes a concentrator element. The concentrator element concentrates incident solar radiation in a focal spot on the absorber to obtain a measurable variable which reliably characterizes the alignment of the concentrator element on the sun. The variable is independent of variations in the apparent position of the sun, weather influences, thermal expansion, and play in the suspension of the concentrator element. The device measures the flux density of the solar radiation in the region of the focal spot using an inlet opening, through which part of the solar radiation passes, a diffuser for reducing the flux density of the solar radiation, and a detector for measuring the flux density which is reduced by the diffuser.
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