Method and system for determining a series of temperature values of a molten metal bath
AssigneeHeraeus Electro-Nite International N.V.
InventorMichel VAN VLIERBERGHE
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Abstract
The present invention relates to a method and a system for determining a series of at least two temperature values of a molten metal bath with a device comprising an optical cored wire and a detector. The method according to the invention has been proven to be especially suitable for multiple repeated measurements, wherein the temperature of the molten metal bath changes between the measurements.
Claims15
A method for determining a series of at least two temperature values T mes(n) and T mes(n+1) of a molten metal bath with a device comprising an optical cored wire and a detector, the method comprising
- (a) providing a set of data relating predicted temperature values Tpred of a molten metal bath to corresponding measurement profiles MP;
- (b) supplying a model F(t) describing the temperature development of the molten metal bath with time;
- (c) defining a time step Δt;
- (d) selecting a future point in time t(n) and predicting a temperature value Tpred(n) of the molten metal bath for the point in time t(n);
- (e) choosing a measurement profile MP(n) corresponding to the predicted temperature value Tpred(n) from the provided set of data relating predicted temperature values Tpred to corresponding measurement profiles MP;
- (f) applying the measurement profile MP(n) at the point in time t(n) to obtain a measured temperature value T mes(n);
- (g) calculating a predicted temperature value Tpred(n+1) of the molten metal bath based on the measured temperature value T mes(n), the model F(t) and the time step Δt;
- (h) choosing a measurement profile MP(n+1) corresponding to the predicted temperature value Tpred(n+1) from the provided set of data relating predicted temperature values Tpred to corresponding measurement profiles MP;
- (i) applying the measurement profile MP(n+1) at a point in time t(n+1) to obtain a measured temperature value T mes(n+1), wherein t(n+1) is defined by
- t(n+1)=t(n)+Δt.
A system for determining a series of at least two temperature values T mes(n) and T mes(n+1) of a molten metal bath comprising a device and a module and the module is adapted to interact with the device, wherein the device comprises an optical cored wire and a detector,
- wherein the module comprises a storage unit, a processing unit and a controlling unit, wherein the storage unit comprises
- (a1) a storage element for providing a set of data relating predicted temperature values Tpred of a molten metal bath to corresponding measurement profiles MP;
- (a2) a storage element for supplying a model F(t) describing the temperature development of the molten metal bath with time;
- (a3) a storage element for defining a time step Δt;
- wherein the processing unit comprises
- (b1) a processing element for selecting a future point in time and predicting a temperature Tpred of the molten metal bath for the future point in time;
- (b2) a processing element for choosing a measurement profile MP corresponding to a predicted temperature Tpred from a provided set of data relating predicted temperature values Tpred to corresponding measurement profiles MP;
- (b3) a processing element for calculating a predicted temperature Tpred of the molten metal bath based on a measured temperature value T mes, a model F(t) and a time step Δt, and wherein the controlling unit comprises
- (c1) a controlling element for applying a measurement profile MP at a point in time to obtain a measured temperature value T mes.
Dependencies are inferred from the claim text.