FLOW-RATE COMPENSATION DEVICE OF GAS METER

PURPOSE: To eliminate the need for a complex mechanical flow-rate compensation treatment and at the same time accurately compensate flow rate even if the operating speed of a mechanical movable part changes during one cycle when a flow rate is constant in a gas meter with the mechanical movable part...

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Main Authors UEKI TAKASHI, NEGORO NOBUO, YUMITA YOSHIO, SHIMAKAWA KAZUO, SATOU YASUNOBU, KAMITE MINEYUKI, WATANABE NORIYUKI, HANAKI KATSUHISA, MAEDA KAORU, FUJISAWA KAZUYA, KANEKO ISAO, OTANI TSUTOMU
Format Patent
LanguageEnglish
Published 31.05.1996
Edition6
Subjects
MEASURING
MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL
METERING BY VOLUME
PHYSICS
TESTING
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Summary:PURPOSE: To eliminate the need for a complex mechanical flow-rate compensation treatment and at the same time accurately compensate flow rate even if the operating speed of a mechanical movable part changes during one cycle when a flow rate is constant in a gas meter with the mechanical movable part. CONSTITUTION: A circular plate 51 rotates at a rate corresponding to a gas flow rate and a pulse with a cycle corresponding to a flow rate is generated by a waveform-shaping circuit 55. In a flow-rate compensating device, a pulse counter 61 measures the number of pulses in a specific amount of time which is counted by a timer 62 and an average pulse cycle operation part 63 calculates an average pulse cycle. Then, a flow-rate operation part 64 calculates a compensated flow rate based on the average pulse cycle by referring to a table 65 for expressing the relationship between the average pulse cycle and the compensated flow rate.
Bibliography:Application Number: JP19940300352