On the problem of inaccurate accuracy of the external clamped ultrasonic flowmeter, if the parameters of the measurement pipeline can not be accurately input, the measurement accuracy will have a relatively large impact.
Can not accurately measure the parameters of the pipeline resulting in inaccurate metering, portable ultrasonic flowmeter probe is installed outside the pipeline, directly measuring the flow of fluid in the pipeline. This flow rate is affected by the flow rate and the flow area of the pipe (the inner diameter of the pipe), and the data is their product. The pipe area and channel length are calculated by the pipe parameters entered by the user manually. The accuracy of these parameters will directly affect the measurement results.
In another direction, even if the flow meter itself is not a problem, but if the user input pipeline data is not accurate, the measurement results are not accurate, the measurement of pipeline parameters will generally be biased, and the wall thickness of the pipeline will change after a period of use, so the measurement data error can not be avoided.
Therefore, when measuring pipe diameter data, we should also pay attention to the rationality of the method, and the measuring tools and instruments should also be calibrated. When measuring these data, we should pay more attention to the influence of the outer protective layer of the pipe and the corrosion and dirt of the outer surface on the measurement data.
