Hydraulic machinery cavitation and gas-liquid two-phase flow monitoring method and device

A technology of gas-liquid two-phase flow and hydraulic machinery, which is applied in the direction of analyzing fluids, analyzing materials, and instruments using sound waves/ultrasonic waves/infrasonic waves. It can solve the problems that monitoring methods and devices are susceptible to interference and difficult to install, and achieve signal anti-interference Strong ability, convenient disassembly, and accurate judgment of flow state

Inactive Publication Date: 2017-07-28
JIANGSU UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method and device for monitoring hydraulic mechanical cavitation and gas-liquid two-phase flow, to provide a non-contact monitoring technology for hydraulic mechanical cavitation and gas-liquid two-phase flow, to solve the problem of traditional monitoring methods And devices are susceptible to interference and difficult to install, providing guarantee for the reliable operation of hydraulic mechanical systems

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  • Hydraulic machinery cavitation and gas-liquid two-phase flow monitoring method and device
  • Hydraulic machinery cavitation and gas-liquid two-phase flow monitoring method and device
  • Hydraulic machinery cavitation and gas-liquid two-phase flow monitoring method and device

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Embodiment Construction

[0020] A specific embodiment of the present invention will be further described below in conjunction with the accompanying drawings.

[0021] Such as figure 1 As shown, firstly, ultrasonic transducers are installed at the outlet of the hydraulic machinery to be tested, and a real-time data collection and data processing platform is built, and data demodulation is performed after data collection, and then classification features are extracted based on support vector machine pattern recognition and streamed according to the classifier. state discrimination, and finally output the gas fraction interval to which the flow state monitoring results belong.

[0022] Such as figure 2 As shown, the simulation experiment is carried out before monitoring, including the data acquisition and analysis system formed by the ultrasonic transducer 1, the acquisition card 2, the computer 3, the data acquisition software 4, and the data analysis software 5, and through the centrifugal pump 6, th...

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Abstract

The invention discloses a hydraulic machinery cavitation and gas-liquid two-phase flow monitoring method and device, and particularly relates to a method and a device by the aid of active ultrasonic technology, digital signal demodulation technology and non-contact measurement technology supporting vector machine identification technology. The method includes the steps: placing an ultrasonic transducer; building a flow-state classifier; acquiring data; analyzing and identifying the data and the like. The device comprises the ultrasonic transducer, an acoustic acquisition card, a computer, a signal acquisition system, a signal analysis system and the like. The method and the device have the advantages that disassembly is convenient, interference of non-intervention installation to system operations is less, the anti-jamming capability of signals is high, flow states are accurately judged and the like. The method and the device can be applied to real-time monitoring of operation states of hydraulic machinery.

Description

technical field [0001] The invention relates to a flow state monitoring method and device, which are applicable to the diagnosis of air bubbles in hydraulic machinery, and particularly refer to the monitoring method and device when cavitation or gas-liquid two-phase flow occurs in hydraulic machinery using active ultrasonic technology. Background technique [0002] Hydraulic machinery is strategic equipment related to the national economy, the people's livelihood and national security. As an important energy conversion device, hydraulic machinery is widely used in various sectors of the national economy. It is not only the core equipment of hydropower stations and pumping stations, but also the key equipment of thermal power and nuclear power. It is widely used in cutting-edge technology fields such as submarines, ships, and aerospace. In order to meet the needs of national security and national economic construction and development, hydraulic machinery is developing in the ...

Claims

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Application Information

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IPC IPC(8): G01N29/02
CPCG01N29/02G01N2291/021G01N2291/022
Inventor 司乔瑞盛国臣袁寿其唐苑峰崔强磊
Owner JIANGSU UNIV
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