Method and apparatus for measuring the volume of a flowing liquid
First Claim
1. Method for measuring the volume of a liquid flowing through a measuring chamber (2, 50, 51, 55) during a measuring period, during which a number of pulses corresponding to the volume is generated by a pulse generator (12, 78, 79), which method comprises the steps of dividing the measuring period into a number of measuring intervals, detecting the pulses in each measuring interval and multiplying the detected pulses by a flow correction factor,characterized by the steps, during each measuring interval, of:
- detecting the pulses from the pulse generator (12, 78,
79), multiplying each separate detected pulse by a flow correction factor which has been selected on the basis of the sum of the corrected pulse values for one or more of the preceding measuring intervals, adding the corrected pulse values to a summation variable and multiplying the value of this summation variable by a volume conversion factor for determining the liquid volume during the measuring interval concerned, and by the step of summing up the liquid volumes for all measuring intervals during the measuring period.
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Accused Products
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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Citations
8 Claims
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1. Method for measuring the volume of a liquid flowing through a measuring chamber (2, 50, 51, 55) during a measuring period, during which a number of pulses corresponding to the volume is generated by a pulse generator (12, 78, 79), which method comprises the steps of dividing the measuring period into a number of measuring intervals, detecting the pulses in each measuring interval and multiplying the detected pulses by a flow correction factor,
characterized by the steps, during each measuring interval, of: detecting the pulses from the pulse generator (12, 78,
79), multiplying each separate detected pulse by a flow correction factor which has been selected on the basis of the sum of the corrected pulse values for one or more of the preceding measuring intervals, adding the corrected pulse values to a summation variable and multiplying the value of this summation variable by a volume conversion factor for determining the liquid volume during the measuring interval concerned, and by the step of summing up the liquid volumes for all measuring intervals during the measuring period.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
Specification