G - Physics – 01 – F
Patent
G - Physics
01
F
G01F 1/86 (2006.01)
Patent
CA 2534248
The invention relates to a device (1) for measuring a mass flow rate (DM) of a flow (40) of particulate material (3) which moves in a predetermined direction (63), said predetermined direction of flow (63), this device (1) being characterized in that it is situated in the flow (40) of particulate material (3) and has: - a weighing cell (6) which is made up of a tubular wall (60) defined between an internal face (61) and an external face (62), this weighing cell (6) having a volume of predetermined value (V), a cross section of predetermined value (C), a weight of predetermined value (W) and being disposed to be passed through by the flow (40) of particulate material (3), - a first apparatus (7) which, at least during a first predetermined time interval (Z), .cndot. weighs the whole made up of the weighing cell (6) and the quantity of particulate material (3) contained in this weighing cell (6), and .cndot. produces a first signal (S1) representing at least the value (P) of the weight of the whole made up of the weighing cell (6) and the quantity of particulate material (3) contained in said weighing cell (6), - a second apparatus (8) which, at least during the first predetermined time interval (Z), measures the speed of flow (E) of the particulate material (3) which flows through the weighing cell (6) and produces a second signal (S2) representing the speed of flow (E) of the particulate material 3 contained in said weighing cell (6), - a third apparatus (9) which uses the first signal (S1), the second signal (S2), the predetermined value (V) of the volume of the weighing cell (6), the predetermined value (C) of the cross section of said weighing cell (6) and the weight of predetermined value (W) of the weighing cell (6) to .cndot. calculate the bulk density (Q) of the particulate material (3), .cndot. calculate the mass flow rate (DM) of particulate material (3) which flows through the weighing cell (6) during the first predetermined time interval (Z), and .cndot. produce a third signal (S3) representing the mass flow rate (DM) of particulate material (3) which flows through the weighing cell (6) during the first predetermined time interval (Z).
Maillefer Sa
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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