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A method for detecting wall-mounted faults of Coriolis mass flowmeters

A technology of mass flowmeter and Coriolis, which is applied in the field of Coriolis mass flowmeter fault detection, can solve the problems of time-consuming and laborious, manual disassembly, etc., and achieve the effect of simple method, solution of mixing, and reduction of maintenance cost

Active Publication Date: 2021-12-10
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Traditional wall-mounted fault detection requires manual disassembly, which is time-consuming and laborious. Therefore, there is an indispensable demand for efficient and professional wall-mounted fault detection technology

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  • A method for detecting wall-mounted faults of Coriolis mass flowmeters
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  • A method for detecting wall-mounted faults of Coriolis mass flowmeters

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, and the present invention includes but not limited to the following embodiments.

[0034] Such as figure 1 As shown, the present invention provides a method for detecting a wall-mounted fault of a Coriolis mass flowmeter. Based on the external vibration signal of the Coriolis mass flowmeter, the method of blind source separation is used to process the signal, and the sample entropy fault characteristic information of the signal is extracted, and the BP neural network is used to realize the wall hanging fault of the Coriolis mass flowmeter purpose of detection. Its specific implementation process is as follows:

[0035] 1. Use the additional vibration sensor to collect 70 sets of external vibration signals of the Coriolis mass flowmeter in different states, of which 50 sets are used as training sample data, and the other 20 sets are used as test sample d...

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Abstract

The invention provides a method for detecting a wall-mounted fault of a Coriolis flowmeter based on external vibration transmission. By using an external vibration sensor outside the Coriolis flowmeter housing, the external vibration signal is obtained, and the signal is processed by blind source separation, and the sample entropy fault characteristic information of the signal is extracted, and the Coriolis flowmeter is analyzed by using the BP neural network. Wall-mounted fault detection for flowmeters. The invention does not need to disassemble the outer casing of the Coriolis flowmeter, the method is simple to implement, and can reduce the maintenance cost of the Coriolis flowmeter; by separating and processing the signals, it can solve the problem of mixing external vibration signals, and can improve fault feature identification and detection accuracy.

Description

technical field [0001] The invention belongs to the field of fault detection of Coriolis mass flowmeters, and in particular relates to a method for detecting wall-mounted faults of Coriolis mass flowmeters. Background technique [0002] Coriolis mass flowmeter (referred to as Coriolis flowmeter) is a direct mass flow meter. The meter has the advantages of high measurement accuracy, wide measurement fluid range, and wide range. It has been widely used in the industrial field and national defense construction. application. [0003] The Coriolis flowmeter performs measurement work based on the Coriolis effect. When the fluid flows through the vibrating tube, due to the Coriolis force, the phase of the vibrator on both sides of the vibrating tube changes. By measuring the phase difference between the two , so as to achieve the purpose of fluid mass flow detection. [0004] However, in the industrial field, the properties of the fluid measured by the Coriolis flowmeter are comp...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F25/00G06N3/04G06N3/08
CPCG01F25/00G06N3/084G06N3/045
Inventor 任建新黄天兴杨鹏张佩
Owner NORTHWESTERN POLYTECHNICAL UNIV