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Multi-channel ultrasonic flowmeter error compensation method based on SVM algorithm

An ultrasonic flowmeter and error compensation technology, applied in the measurement flow/mass flow, liquid/fluid solid measurement, measurement device and other directions, can solve the problem of low compensation accuracy, and achieve the effect of improving measurement accuracy and reducing errors

Active Publication Date: 2022-03-04
BEIJING UNIV OF CHEM TECH
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Problems solved by technology

[0008]The disadvantages of the above technology are: only for a single factor, and the compensation accuracy is not high

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  • Multi-channel ultrasonic flowmeter error compensation method based on SVM algorithm
  • Multi-channel ultrasonic flowmeter error compensation method based on SVM algorithm

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[0020] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the embodiments and accompanying drawings.

[0021] like figure 1 As shown, the flow of the multi-channel ultrasonic flowmeter error compensation method based on the SVM algorithm includes the following steps:

[0022] Step 10: Obtain flow data of multiple channels through multi-channel ultrasonic flowmeter measurement, and extract ambient temperature and medium temperature at the same time;

[0023] Step 20 preprocesses the channel flow data to obtain an asymmetry coefficient and an integral velocity;

[0024] Step 30: Input relevant parameters into the support vector machine model, and set the error as an output, add the output error to the measured indication value for compensation, and obtain the compensation result;

[0025] Step 40 compares the compensated data with the original data,...

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Abstract

The invention discloses a multi-channel ultrasonic flowmeter error compensation method based on an SVM (Support Vector Machine) algorithm, which comprises the following steps of: measuring and acquiring flow data of a plurality of channels through a multi-channel ultrasonic flowmeter, and extracting environment temperature and medium temperature at the same time; preprocessing the sound channel flow data to obtain an asymmetric coefficient and an integral speed; inputting related parameters into the support vector machine model, setting an error as an output, and adding the output error to the measured indicating value for compensation to obtain a compensation result; and comparing the compensated data with the original data, and performing method verification by comparing relative errors before and after compensation. The measuring precision of the ultrasonic flowmeter can be remarkably improved, and errors caused by influence factors are reduced.

Description

technical field [0001] The invention relates to the technical field of ultrasonic flow measurement, in particular to an error compensation method for a multi-channel ultrasonic flowmeter based on an SVM algorithm. Background technique [0002] The measurement accuracy of an ultrasonic flowmeter will be affected by factors such as temperature, flow fluctuation, and flow field, among which the most significant factor is the asymmetry of the flow field. Aiming at the unstable flow field caused by the gate valve in the pipeline, the influence of factors such as ambient temperature, medium temperature and asymmetry coefficient on the measurement error of the ultrasonic flowmeter is studied. [0003] Aiming at the error compensation method research, the ultrasonic flowmeter error compensation model based on the support vector machine is designed, and the environmental temperature, medium temperature and asymmetry coefficient, the speed of the eight sound channels after circular in...

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Application Information

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IPC IPC(8): G01F1/667
CPCG01F1/668
Inventor 史慧超黄枭沈怀明王亿文张悦华
Owner BEIJING UNIV OF CHEM TECH
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