| 摘要 |
The invention relates to a measuring system for measuring a density of a medium flowing in a process line, said medium being variable regarding its thermodynamic state, especially at least being proportionally compressible, along an imaginary axis of flow of the measuring system. The measuring system comprises at least one temperature sensor that is located in a temperature measuring point and that primarily reacts to a local temperature, 9, of a medium flowing past, at least one pressure sensor that is located in a pressure measuring point and that primarily reacts to a local pressure, p, and at least one electronic measuring unit that at least temporarily communicates with at least the temperature sensor and the pressure sensor. The electronic measuring unit generates a provisional density value, using the temperature measurement signal and at least the pressure measurement signal. The electronic measuring unit further generates at least temporarily at least one density value, using the provisional density value and at least one correctional density value that depends on a flow speed of the medium and on the local temperature prevailing in the temperature measuring point. Said density value momentarily represents a local density, ?, which the flowing medium actually has in the virtual density measuring point, more correctly than the provisional density value.
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