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Ultrasonic wave measuring method for liquid flowing speed and flow of pressure pipeline

A liquid flow and measurement method technology, applied in the field of measurement, can solve problems such as poor accuracy, achieve the effect of improving flow measurement accuracy and eliminating influence errors

Inactive Publication Date: 2011-07-06
上海申瑞电力科技股份有限公司
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Problems solved by technology

However, because the flow rate of the liquid is related to the carrier, the ordinary ultrasonic measurement method has poor accuracy

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  • Ultrasonic wave measuring method for liquid flowing speed and flow of pressure pipeline
  • Ultrasonic wave measuring method for liquid flowing speed and flow of pressure pipeline
  • Ultrasonic wave measuring method for liquid flowing speed and flow of pressure pipeline

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Embodiment Construction

[0028] The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings, but the present embodiments are not used to limit the present invention. All similar methods and similar changes adopted in the present invention should be included in the protection scope of the present invention.

[0029] The method for improving the accuracy of ultrasonic measurement of liquid flow provided by the embodiment of the present invention is characterized by adopting a two-way simultaneous measurement method to eliminate the influence of changes in ultrasonic propagation speed in different liquids on measurement accuracy.

[0030] The basic principle of ultrasonic measurement is that the flow of liquid causes the time of ultrasonic propagation in a specified distance to change, and the speed of liquid flow is calculated according to the change of time. Because the speed of ultrasonic propagation in different liquids is different, for ex...

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Abstract

The invention discloses an ultrasonic wave measuring method for the liquid flowing speed and the flow of a pressure pipeline, relating to the technical field of measurement, and solving the technical problem of low precision for measuring liquid flow by ultrasonic wave. The ultrasonic wave measuring method is characterized in that error influence on measurement precision because the transmission rate of ultrasonic wave in different liquids changes is eliminated with a bidirectional simultaneous measurement method. The measuring method comprises the following steps of: (1) simultaneously measuring the Ti1 and the Ti2 of each sound path; (2) calculating the line mean velocity of each sound path; and (3) carrying out integration to a measured cross section by the flow rate on each sound path to obtain the flow of the measured cross section. The measurement precision can be improved with the measuring method, and the measuring method is suitable for measuring different liquids.

Description

Technical field [0001] The invention relates to measurement technology, in particular to an ultrasonic measurement method for liquid flow velocity and liquid flow in a pressure pipeline that can improve measurement accuracy. Background technique [0002] There are many methods to measure liquid flow, and ultrasonic measurement is a common method. However, because the flow rate of the liquid is related to the carrier, the accuracy of the ordinary ultrasonic measurement method is poor. For example, for a pressurized pipe, the flow velocity of the liquid at each position of its cross section is not the same. Therefore, simply measuring the flow rate of the liquid according to the change of the sound wave velocity in the liquid, the measured data has a large error with the actual situation, and different improvement methods must be adopted according to the characteristics of the liquid carrier. Summary of the invention [0003] In view of the above-mentioned defects in the prior art...

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Application Information

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IPC IPC(8): G01P5/18G01P5/24G01F1/66
Inventor 杨浩赟
Owner 上海申瑞电力科技股份有限公司
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