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Method for flow measurement with ultrasound

A flow measurement and ultrasonic technology, applied in the field of flow measurement that can achieve anti-interference, can solve the problems of high design complexity, high production cost, inconvenient use, etc., and achieve the effect of reducing complexity, removing influence, and improving accuracy

Active Publication Date: 2017-02-15
SUZHOU DONGJIAN INTELLIGENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this method can effectively solve the existing problems, there are problems such as high design complexity, large space occupation, and high production cost, so it is not convenient to use

Method used

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  • Method for flow measurement with ultrasound

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Embodiment Construction

[0017] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0018] see figure 1 . It should be noted that the diagrams provided in this embodiment are only schematically illustrating the basic idea of ​​the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and shape of the components in actual implementation. Dimensional drawing, the type, quantity and proportion of each component can be changed arbitrarily duri...

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Abstract

The invention provides a method for adopting ultrasonic waves to measure flow. The method includes preliminarily judging whether transmission of the ultrasonic waves is interfered or not according to downflow and counterflow transmission time of the ultrasonic waves, and if being interfered obviously, abandoning a measured value of this time and remeasuring; if the measured value is within a normal range, calculating time difference between downflow and counterflow, judging whether the time difference is within a normal range or not, if not, abandoning the measured value and remeasuring, and if yes, storing the time difference; repeating measuring for many times, acquiring multiple normal time differences, and solving an average value of the normal time differences as a calculating basis of instant flow. An anti-interference algorithm is added in the method, so that influence on measuring results due to tiny bubbles or impurities can be eliminated effectively, measuring accuracy can be improved effectively, complexity of original pipeline design can be lowered effectively, and cost can be lowered.

Description

technical field [0001] The invention relates to a flow measurement method using the ultrasonic propagation time difference method, in particular to a flow measurement method capable of realizing anti-interference. Background technique [0002] Ultrasonic transit time difference method is one of the commonly used methods for flow measurement using ultrasonic waves. Its principle is to calculate the flow velocity based on the difference between the forward and upstream propagation times of the ultrasonic signal, thereby calculating the flow rate. Since the propagation velocity of ultrasonic waves in water is much greater than the flow velocity of the fluid to be measured, it is necessary to accurately measure this time difference in order to achieve high accuracy. In practical applications, the time difference value needs to reach an accuracy of tens of ps. If there are tiny bubbles or impurities in the fluid, these tiny bubbles or impurities will have a certain amount of infl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F1/66
Inventor 裴健徐新民
Owner SUZHOU DONGJIAN INTELLIGENT TECH
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