TIME AVERAGING METHOD AND APPARATUS FOR OBTAINING FLUID MEASUREMENTS

摘要

This specification discloses a method and apparatus for accumulating signals from a water-cut monitor and a flow meter in a form whereby the net oil and net water in an oil-water mixture may be determined. A flow meter signal in the form of constant-amplitude, frequency-variable d-c pulses is applied to a capacitor to charge the same. A signal from the water-cut monitor is modulated in proportion to the meter signal in order to produce a modulated signal of d-c pulses in which pulse amplitude is proportional to water content and pulse frequency is proportional to flow rate. This modulated signal is stored on another capacitor. Both capacitors are interrogated at periodic time intervals in order to obtain read-out signals representative of the charges thereon and the capacitors are discharged. Also disclosed is a system for obtaining gas flow information. In this system a pressure signal is modulated in proportion to a DELTA P signal to produce a modulated signal of d-c pulses which is applied to a capacitor. The capacitor is interrogated as described above.