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The manufacturing of ultrasonic gas flow meters

机译：超声波气体流量计的制造

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摘要

From their introduction, ultrasonic flow meters have received a rapid acceptance as being one of the favored measurement methods for high accuracy custody transfer applications in high-pressure gas transmission systems. There are many benefits when using ultrasonic technology; increased range-ability and capacity over conventional measurement technology with unparalleled accuracy are near the top of the list. But in many cases, even more important are the cost savings obtained due to the decrease in maintenance costs and savings in compressor fuel cost by the reduction of the pressure drop through the station. Key elements in the success of the ultrasonic technology are the manufacturing methods and procedures that result in tight tolerances in the geometry of the meter. Whereas the accuracy of the meter is mainly dependent on the quality of the geometry and accuracy of the time measurement, the stated performance of the meter can be guaranteed based on a dry calibration only; a practice identical to the widely accepted orifice measurement. The purpose of this paper is to focus on the influence of the manufacturing tolerances on the uncertainty of the measurement, the dry calibration procedure and the final comparison with the results obtained after wet calibrations.
机译：从它们的介绍开始，超声波流量计已迅速被接受为高压气体传输系统中高精度贸易交接应用的首选测量方法之一。使用超声波技术有很多好处。与传统的测量技术相比，具有无与伦比的准确性的增加的量程能力和容量几乎是榜首。但是，在许多情况下，更为重要的是由于维护成本的降低而节省的成本以及通过减少站内压降而节省的压缩机燃料成本。超声波技术成功的关键要素是制造方法和程序，它们会导致仪表几何形状的严格公差。仪表的精度主要取决于几何形状的质量和时间测量的精度，而仪表的规定性能只能基于干校准来保证;与广泛接受的孔口测量相同的做法。本文的目的是集中于制造公差对测量不确定度，干校准程序以及与湿校准后获得的结果的最终比较的影响。

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