 | |
The measuring system for the continuous flow measurement for densephased-conveyed materials and high flow rates.
In the measuring pipe a homogeneous measuring field is produced by special linking of a high frequency, electromagnetic alternating field. Solids, which are within this measuring field, absorb the energy of this alternating field. This leads to a measuring signal according to the concentration of the material to be conveyed in the measuring pipe (kg/m3).
By means of the same sensor technology within the measuring tube on two further places the change of the alternating field is measured. These two sensors have a defined distance to eachother.
The evaluation unit with its integrated correlator determines the time of the conveyed material between the two sensors. With the known distance the velocity of the solid is then determined (m/sec).
From the two measured sizes concentration (K) and velocity (V) as well as the known cross section (A) of the measuring pipe then the flow rate is determined according to: Q = K x V x A and evaluated as a 4…20mA-signal.
|
