Patent ID: 6786082
Filing Date: 2004-09-07
Classification: G01N

Abstract:
A system arranged to be operable with a furnace having mixtures of materials exhibiting different phases, the system comprising:a blowing tuyere generating an airflow, the tuyere having a furnace duct for transmitting the airflow to the furnace; an electric signal generator for generating an electrical signal; at least one transducer converting the electrical signal into mechanical waves, the mechanical waves travelling in the furnace duet together with the airflow in a wave direction which is transversal to the airflow direction along the furnace duct, the mechanical waves being transmitted to the furnace and being reflected by the materials according to their different phases to produce one or more reflected signals; at least one sensor detecting the one or more reflected signals and generating a corresponding one or more detected signal; and a first processing element measuring a propagation time of the one or more reflected signals to determine the phase of the mixtures of materials through which the one or more reflected signals have propagated.