Cross-correlation circuit for process function measurement - has outputs of two sensors coupled to cross-correlator for measurement of physical factors

摘要

A cross-correlation circuit is designed for the measurement of physical parameters e.g. flow measurements in multi-phase or solid flow systems. The system requires that two test signals are generated. A correlation measurement system for the determination of flow velocity in pipes has two sensors (2,3) located at a specific distance from each other. The flow generated noise signals are processed (5,6) to produce functions (x(t), y (t)) that are cross-correlated (4) using the relationship defined by Rxy(tau) is the limit as T tends to infinity of the integral from 0 to T of x(t) y (t+tau).at. The output of the correlator is used to activate a coupled result display unit (7).