| 摘要 |
PURPOSE:To measure the flow speed optically, quickly and accurately by simple signal processing in accordance with large random signals by running air foam out into fluid, and measuring the flow speed by the random signal of the light scattered by the air foam. CONSTITUTION:Air foam 5 is run out into the fluid of a flow pipe 7 by an air pump 12 and an air foam injecting pipe 14. A photosensor 1 provided with optical fibers 8, 9 for light projection and photodetection detects optically large random signals by the light scattered by the air foam 5. Thus, even with the fluid contg. less dust and suspended solids, the large random signals are detected easily, and the flow speed over a wide range is measured optically, quickly and accurately by the simple signal processing. |
