Natural Gas Flow Measurement Method

At first, the paper analyses the actuality and future trend of natural gas flow metering, then introduce natural gas stream body and flow metering feature, at last the paper focus on extensively used three kinds of flow meter and make contrastive analysis on method of application, clearly summarize their merits and drawbacks and field of application .For one thing, the paper introduce the application of the orifice flow meter that concretely include: One, flow meter's principle of operation. Two, the flow meter' s hardware circuit and software institutional implementation, among others hardware circuit concretely include sensor' s lectotype, data acquisition design of circuits, software part mostly introduce figure and data acquisition programs. Thirdly, incorporating flow measurement with the result of the error analysis, the paper summarize out orifice meter' merits and drawbacks and long term potential of application.Secondly, the paper introduce the application of vortex shedding flow meter that concretely include: One, flow meter' s principle of operation. Two, flowmeter' s hardware circuit and software institutional implementation .hardware part concretely include sensor lectotype, input channel of the frequency measurement' s magnify, filtration, reshape and isolation circuit, the gateway of warm-pressing for recovery; chip microprocessor and its peripheral circuit. Three, uniformly incorporating flow measurement' error analysis, the paper summarize vortex shedding flowmeter' s merits and drawbacks and long term potential of application.Thirdly, the paper introduce the application of gasses ultrasonic flowmeter that concretely include: One, flowmeter' s operational principle of time difference law. Two, flowmeter' shardware circuit and software institutional implementation procedure; hardware part emphasisly introduce clearly energy converter lectotype , the realization theory of frequency difference metering with phase locked loop, the gateway of warm-pressing for recovery, chip microprocessor and its peripheral circuit. Three, uniformly incorporating flow measurement' error analysis, the paper summarize gasses ultrasonicflowmeter' s merits and drawbacks and long term potential of application.Finally, the paper introduces ideal flow meter model and flow meter selection. Incorporating three kinds of flowmeter' s merits and drawbacks, the paper derive three kinds flowmeter' s respective field of application and trend of development.