FIELD: physics.
SUBSTANCE: measuring system has at least one temperature sensor placed at the point of measuring temperature, which primarily responds to local temperature ϑ of medium flowing past, at least one pressure sensor placed at the point of measuring pressure, which primarily responds to local, particularly static, pressure p of medium flowing past, and an electronic measuring unit at least temporarily connected to at least the temperature and pressure sensors. The temperature sensor generates at least one temperature measuring signal which is subject to the effect of local temperature of the measured medium. The pressure sensor generates at least one pressure measuring signal which is subject to the effect of local pressure p in the measured medium. Through the temperature measuring signal and at least the pressure measuring signal, as well as at least one numerical compensating coefficient, particularly stored in digital form, the electronic measuring unit generates, at least temporarily, at least one, particularly in digital form, density measured value which is local density in at the given moment in time which the flowing medium has at the point of measuring density, particularly a virtual point, lying a given distance along the axis of flow from the point of measuring pressure and/or temperature. The compensating coefficient corresponds to the calculated, particularly before and/or during operation, arising along the axis of flow, measuring system of local variability of at least one parameter of the thermodynamic state of the medium, particularly temperature, pressure and/or density, and/or the calculated, particularly before and/or during operation, arising along the axis of flow, measuring system of local variability of the Reynolds number of the flowing medium.
EFFECT: high accuracy of measuring parameters which are determined using spatially distributed detected state parameters such as pressure or temperature.
45 cl, 4 dwg
