Nonlinear correction method for ultrasonic flowmeter instrument coefficient
A technology of instrument coefficient and flowmeter, applied in the ultrasonic field, can solve the problem of large instrument coefficient error and so on
Active Publication Date: 2016-01-06
TANCY INSTR GRP
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[0005] The invention provides a non-linear correction method for the instrument coefficient of an ultrasonic flowmeter to solve the problem that the instrument coefficient calculated according to the existing theoretical formula causes large errors because the instrument coefficient of the ultrasonic flowmeter changes in real time
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[0047] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
[0048] figure 1 It is a flowchart of an embodiment of the method for non-linear correction of the ultrasonic flowmeter meter coefficient of the present invention. Such as figure 1 As shown, the method for non-linear correction of the ultrasonic flowmeter meter coefficient of this embodiment may specifically include the following ste...
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The invention provides a nonlinear correction method for ultrasonic flowmeter instrument coefficient. The nonlinear correction method comprises the following steps of selecting flow of a plurality of first measuring points of to-be-measured fluid in a pipeline where the ultrasonic flowmeter lies as a theoretical value, measuring practical values of the fluid in each first measuring points and practical values of the instrument coefficient corresponding to the flow of each first measuring points, selecting each range section according to each first measuring points, building an instrument coefficient expression of each range section according to the practical value of each first measuring point, the practical value of the instrument coefficient corresponding to the practical value of the flow of each first measuring point and a preset relation, and calculating a value of the instrument coefficient in each range section according to the instrument coefficient expression of each range section. Instrument coefficient errors can be reduced by the use of the calculation method for the ultrasonic flowmeter instrument coefficient, so more accurate calculation results can be achieved for the ultrasonic flowmeter instrument coefficient and more accurate ultrasonic flowmeter measuring can be realized.
Description
Technical field [0001] The invention relates to the technical field of ultrasonic waves, in particular to a method for non-linear correction of ultrasonic flowmeter meter coefficients. Background technique [0002] Ultrasonic flowmeter is one of the most rapidly developed flowmeters in recent years. It is a measurement technology that uses the flow rate information of the fluid when the ultrasonic signal is propagated in the fluid to measure the fluid flow. It has non-contact measurement, high measurement accuracy, Some outstanding advantages such as wide measurement range and convenient installation and maintenance are often applied to the flow measurement of gas, natural gas, oil and gas and other gases. [0003] The time difference method is one of the common methods for flow measurement using ultrasonic waves. Its principle is to calculate the flow velocity based on the difference between the propagation time of the ultrasonic signal downstream and the propagation time of the r...
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IPC IPC(8): G01F1/66
Inventor 杨鸣金定飞徐永鹏鲁法利
Owner TANCY INSTR GRP