| 摘要 |
PURPOSE:To take an measurement automatically in a short time of several seconds by irradiating the top surface of smoothed combustion ashes with constant-illuminance light together with a standard brightness sample and finding the quantity of unburnt components in the ashes from the ratio of measured brightness. CONSTITUTION:The combustion ashes 5 which are sampled 2 continuously from a dust coal boiler 1 are uniformed by a mixer 3 and fallen on a feeder 4. Consequently, the ashes have surface unevenness removed by a smoothing plate 6 and is irradiated by a light source 7 which has an irregularity in the quantity of light removed by using a constant voltage DC power source together with the standard brightness sample 9. The surface of the combustion ashes 5 which have no shadow because of the smoothing and is irradiated by the light source 7 is picked up by a television camera 8 together with the sample 9. The signal of picture elements of this camera 8 is A/D-converted 10 and an image processor 11 calculates the ratio of the mean brightness between the surface of the combustion ashes 5 and the sample 9. Then an unburnt component arithmetic part 12 calculates the quantity of unburnt components in the combustion ashes 5 from the relation between an unburnt component ratio which is found experimentally and the ratio of the brightness and outputs the result to an output device 13. |
