| 主权项 |
1. A monitoring unit (100) for determining an attribute (P) of a liquid substance, comprising:
a dielectric conduit (110); a processor (130) configured to determine said attribute (P), said attribute (P) containing a first number of different parameters (p1, p2, p3), the first number being larger than or equal to two; a measurement element (120) comprising a second number of measuring circuits, the second number being larger than or equal to the first number, each measuring circuit comprising a coil member (121, 122, 123) encircling the dielectric conduit (110) and connected to the processor (130), each coil member (121, 122, 123) being configured to produce a respective electromagnetic field (B(f1), B(f2), B(f3)) at a spectral range (f1, f2, f3) different from the other coil members (121, 122, 123), each of the coil members (121, 122, 123) subjecting the liquid substance, flowing through the dielectric conduit (110), to a respective one of the electromagnetic fields (B(f1), B(f2), B(f3)) of the respective different spectral range (f1, f2, f3), when under influence of the electromagnetic fields (B(f1), B(f2), B(f3)), each of the coil members (121, 122, 123) producing a respective impedance measure (z(f1), z(f2), z(f3)) of the liquid substance, flowing through said dielectric conduit, (110) in response the electromagnetic field (B(f)) applied to the liquid substance via each said coil member (121, 122, 123), wherein the processor registers each impedance measure (z(f1), z(f2), z(f3)) and derives each of the first number of parameters (p1, p2, p3) based on the registered impedance measures (z(f1), z(f2), z(f3)), each of the parameters (p1, p2, p3) being derived from a plurality of the registered impedance measures (z(f1), z(f2), z(f3)). |
