New method for determining at given intervals the quantity of fluid delivered through a pipeline during a time greater than said intervals and device for practising this method

摘要

1,159,518. Flow meters. SOC. NATIONALE DES PETROLES D'AQUITAINE. 1 Aug., 1967 [5 Aug., 1966], No. 35368/67. Heading G4H. Apparatus for determining at regular intervals t, 2t, 3t..., the amount of fluid which has flowed through a pipe line 1 during a given period Nt includes a memory bank 12a, 12b . . . and a distributing device 11 (controlled by a clock 17) to which are fed pulses the frequency of which represents the rate of flow of the fluid and which directs the pulses to each of the memories in turn for a time t, the number of pulses in all the memories being summed in a counter 13, the count in which is read out and printed at the regular intervals t, 2t, 3t... After the count has been read out and before the incoming pulses are fed to a new memory, e.g. memory 12n, the contents of that memory are subtracted from the count and the memory cleared. In the embodiment described, the pulses are derived from a voltage-frequency converter 8 to which is fed a voltage signal the amplitude of which is proportional to the square root of the pressure difference between points 6, 7 on either side of a pressure reducing member 5. The total number of pulses are accumulated in a counter 15.