| 摘要 |
The invention relates to a flow measuring method and to a corresponding system for carrying out said method. For the contactless optical measurement of flow properties of a flowing medium that consists of molecules (G) of one molecule type or of a mixture (G) of different molecule types, said system comprises: an installation (1) for conducting the flowing medium (G) along a desired direction; a generation light source (2), arranged in a first non-interfering position (P1), for the contactless generation (EZ) of detection molecules (NG) by conversion of at least a sufficient portion of the molecules (G) of at least one molecule type into detection molecules (NG) of a molecule type different therefrom by way of photomodification, preferably by photodissociation, in the flowing medium in a generation location (EO) at a generation time (ET); an optical measurement system (3), arranged in a second position (P2), for the contactless detection (N) of the previously generated detection molecules (NG) as a component of the flowing medium in a detection location (NO) at a detection time (NT); and an analytical unit (4) which is suitably connected to the generation light source and the optical measurement system and which serves to determine (BS) the flow properties of the flowing medium from the spatial and temporal correlations between the generation location (EO) and the detection location (NO) and between the generation time (ET) and the detection time (NT) of the detection molecules (NG) in the flowing medium. |
