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# Affect measurement accuracy of ultrasonic flowmeter scale factor and the solution

by：Sincerity Group     2021-01-01
Abstract: the factors influencing the measurement accuracy of ultrasonic flowmeter scale and solution information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. Abstract: accuracy is an important indicator of measuring instrument, the method of time difference ultrasonic flowmeter in flow measurement, the error sources come mainly from several aspects, this article introduces several kinds of errors and their solutions. Accuracy is an important indicator of measuring instrument, the time difference method. More flow meter manufacturers choose model price quote you are welcome to inquire, here is the factors affecting measuring precision of ultrasonic flow meter scale and solutions the article details. Accuracy is an important indicator of measuring instrument, the method of time difference ultrasonic flowmeter in flow measurement, the error sources come mainly from several aspects, this article introduces several kinds of errors and their solutions. Accuracy is an important indicator of measuring instrument, the method of time difference ultrasonic flowmeter in flow measurement, the error sources come mainly from the following aspects: (1) the processing precision and the influence of the temperature change of mechanical size. Acoustic path Angle, pipe diameter D, acoustic distance L mechanical parameters, such as machining accuracy, temperature stability has a direct influence on flow measurement. In the process of measurement, they will change with the change in temperature. This error can be through precision machining, the reasonable material selection and reasonable structure design to zui small effect. 2 temperature change on the influence of flow rate. Ultrasonic wave propagation velocity of fluid temperature rises, thus will bring measurement error. Fluid temperature change effect on the accuracy of temperature compensation method can be used by measuring the temperature of the fluid and temperature compensation mathematical model for calculation of automatic compensation. (3) on the electrical characteristics of error. Devices work instability, low accuracy of counting circuit will bring flow measurement error. In order to reduce the error, we choose 100 MHZ, high precision, high stability of the quartz crystal oscillator as the clock reference signal, choose large-scale high-speed programmable logic devices ( CPLD) To realize the complex logic control and high precision timing functions, in order to achieve stability and reliability of the system. (4) echo waveform change and the amplitude changes bring error will make the ultrasonic flowmeter binarization circuit timing point change, waveform caused by error. It's hard to overcome error with hardware method, must use the software method is introduced into intelligent analysis algorithm to solve. Above is all there is in this article, you are welcome to inquire me manufacturer flowmeter selection, quotation, etc.
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