Fluid flow rate and flow measurement device and method

The invention discloses a fluid flow rate and flow measurement device and method. The fluid flow rate measurement device comprises an alternating current excitation source, a three-electrode noncontact type conductivity sensor, a two-end grounding structure, a signal processing module, a data acquiring module and a microcomputer. The invention realizes that a noncontact conductivity measurement technology is used in fluid flow rate and flow measurement. Two groups of independent conductivity signals are obtained by using the three-electrode noncontact type conductivity sensor, and processed by adopting relevant technologies to obtain fluid flow rate and flow. According to the adopted series resonance method, the adverse influences on the measurement range and the sensitivity of a couplingcapacitor are effectively eliminated. By adopting the two-end grounding structure, the adverse influences to the measurement precision by floating voltages at two ends of a pipeline are eliminated, and an insulation measureme