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Ultrasonic flowmeter flow measurement method based on data fusion

A technology of data fusion and flow measurement, which is applied in the measurement of flow/mass flow, fluid velocity measurement, liquid/fluid solid measurement, etc., and can solve problems such as poor anti-interference performance

Active Publication Date: 2021-02-02
ZHEJIANG UNIV
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  • Application Information

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Problems solved by technology

[0005] The purpose of the invention is to provide an ultrasonic flowmeter flow measurement method based on a data fusion algorithm, which can solve the problem of poor anti-interference performance existing in the existing ultrasonic flowmeter propagation time detection method, thereby improving the reliability of flow detection and the accuracy of detection results

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  • Ultrasonic flowmeter flow measurement method based on data fusion
  • Ultrasonic flowmeter flow measurement method based on data fusion
  • Ultrasonic flowmeter flow measurement method based on data fusion

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Embodiment Construction

[0032] like image 3 As shown, the ultrasonic flowmeter flow measurement method based on data fusion includes the following steps:

[0033] S1: Initialize the system, and set the initial flow Q=0 by default;

[0034] S2: Import the ultrasonic signal received by the signal acquisition system. Optionally, preprocess the signal by filtering, debiasing, etc., and record the processed downstream ultrasonic signal sequence as x d (n), the countercurrent ultrasonic signal sequence is x u (n), the signal sampling frequency is fs ;

[0035] S3: Use the correlation method to calculate the downstream ultrasonic signal x d and countercurrent ultrasonic signal x u Corresponding propagation time t d1 and t u1 , and the flow rate can be calculated further where K 1 It is the flow coefficient under the correlation method, which is related to the parameters of the flowmeter primary instrument (including the measuring tube and the ultrasonic transducer) and the algorithm parameters of ...

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Abstract

The invention relates to an ultrasonic flowmeter flow measurement method based on data fusion. The ultrasonic flowmeter flow measurement method has the advantages of a correlation method and a threshold method, can effectively resist signal amplitude attenuation and distortion caused by factors such as temperature change and aging, and can solve the problem of poor anti-interference performance ofan existing ultrasonic flow meter propagation time detection method. The anti-interference capability of a flowmeter is improved, the reliability of a flow measurement result is enhanced, and the measurement accuracy is improved.

Description

technical field [0001] The invention belongs to the technical field of ultrasonic flowmeters, and relates to a flow measurement method of ultrasonic flowmeters based on data fusion. Background technique [0002] Ultrasonic flowmeter has been widely used in the field of flow measurement due to its advantages of non-contact, small pressure loss and wide measuring range. According to its principle, ultrasonic flowmeter can be divided into propagation time difference method, Doppler method, beam shifting method and other types. Among them, the propagation time difference method is the most widely used because of its simple implementation and can be applied to ultrapure liquids. Ultrasonic flowmeters using the propagation time difference method are also called transit-time ultrasonic flowmeters. The basic implementation of transit-time ultrasonic flowmeters is shown in the appendix figure 1 and figure 2 As shown, the first ultrasonic transducer 2 and the second ultrasonic tran...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/66G01P5/24
CPCG01F1/66G01P5/245
Inventor 付新刘成卫胡亮刘伟庭苏芮
Owner ZHEJIANG UNIV