Measurement System Design Of Differential Pressure And Conductance Sensors For Two Phase Flow

Simulation well facilities can be a very important method for the study of multi-phase flow problems, either for theoretical study or for practical study, so it is of great importance to investigate flow characteristic measurement system for simulation well.First, the hardware system for measuring two phase flow characteristic based on differential pressure measurement method and conductance measurement method was designed, this system was more extensible and easier to control. As virtual instrument technology is more and more widely used in many aspects of actual measuring and testing process, the design of data acquiring and signal analyzing software using graphical programming language LabVIEW which is based on virtual instrument technology was placed emphasis in the software system design. Both the digital signal process toolbox in LabVIEW and widely used nonlinear time series analyzing method were used when designing the program. The software integrated these signal processing methods into the LabVIEW environment, all of which were called by one program, allowed users to choose one or more from these methods. The selected methods would run continuously and the result would be saved automatically. These settings greatly improved the convenience of the signal process software, provided user with intuitionistic interface and could be easily used. By dealing with dynamic measured signal of two phase flow, the software system proved to be effective of making time-frequency domain analysis and non-linear analysis. Based on the signal of differential pressure sensor, the water volume fraction parameter was analyzed, then the drift-flux flow model was established, which provided a model test for measuring individual phase flow rate of oil-water two phase flow.