| 摘要 |
A method for control of a thermal, or calorimetric, flow measuring device, which ascertains and/or monitors, by means of two temperature sensors, the flow of a measured medium through a pipeline or measuring tube in a process, wherein the current temperature (Ti) of the measured medium is ascertained at a point in time (ti) via a first temperature sensor, wherein, to a second temperature sensor, a defined heating power is supplied, which is so sized that a predetermined temperature difference (Thetatarget) occurs between the two temperature sensors, and wherein, in the case of a deviation (Thetatarget-Thetai) of the current temperature difference Thetai measured in the actual-state from the temperature difference (Thetatarget) predetermined for the target-state, at a following point in time (ti+1) , the heating power (Qi+1) supplied to the heatable temperature sensor is ascertained The heating power (Qi+1) is determined taking into consideration physical conditions in the process, as such are reflected in a time constant (tau).
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