Measuring device for capturing fluorescence intensity of free radical of flame at fixed point

The invention relates to burning diagnostic equipment and especially relates to a measuring device for capturing fluorescence intensity of free radical of flame at a fixed point. The measuring device for capturing fluorescence intensity of free radical of flame at the fixed point disclosed by the invention comprises a light collecting unit, a light transmission unit and a light sensing unit, wherein the light collecting unit comprises a cassegrain lens; the light transmission unit comprises an optical fiber, a collimating lens and an optical filter; the light sensing unit comprises a black box, a photomultiplier and a data acquisition unit; the cassegrain lens is used for collecting the flame light at the fixed point; the optical fiber is used for transmitting light; the collimating lens is used for converting the divergent beams emitted from the optical fiber into parallel beams; the bayonets of the optical filter and the collimating lens are arranged on a side wall of the black box; the optical filter is located between the collimating lens and the photomultiplier; the photomultiplier is located in the black box; an output signal of the photomultiplier is outputted through a pin line and is connected with the data acquisition unit; and the data acquisition unit is used for displaying and processing an outputted electric signal. The measuring device provided by the invention has the greatest characteristic of acquiring the light intensity information of the free radical of flame at the fixed point.