Measuring and testing – Volume or rate of flow – Using rotating member with particular electrical output or...
Patent
1989-12-04
1990-11-13
Ruehl, Charles A.
Measuring and testing
Volume or rate of flow
Using rotating member with particular electrical output or...
7386103, 364510, G01F 1502, G01F 15075
Patent
active
049693654
ABSTRACT:
In a method for measuring the volume of a liquid flow through a measuring chamber (2) during a measuring period, a pulse generator (12) is caused to emit a number of pulses corresponding to the volume. In the measurement, the measuring period is divided into a number of measuring intervals. During each measuring interval, the pulses from the pulse generator (12) are detected, each detected pulse is multiplied by a flow correction factor, the corrected pulse values are added to a summation variable, and this summation variable is multiplied by a volume conversion factor for determining the liquid volume. The separate determined liquid volumes are thereafter summed up for all measuring intervals during the measuring period.
A measuring apparatus for measuring the volume of a liquid flow through a measuring chamber (2) has a pulse generator (21, 23) for generating a number of pulses corresponding to the volume, has time base means (33) for dividing the measuring period into measuring intervals, memory means (34) for storing one or more correction factors, pulse-correcting computing means (24, 25) for multiplying each detected pulse by said one or more correction factors, adder means (26, 27) for adding the corrected pulse values, and multiplier means (35) for multiplying the added corrected pulse values by a volume conversion factor.
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Andreasson Tord
Strigard Bengt-Olof
Ljungmans Industrier AB
Ruehl Charles A.
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