Ultrasonic focused river sediment concentration on-line measurement method

A measurement method, focused technology, applied in the field of ultrasonic liquid-solid two-phase flow measurement, sediment concentration, signal processing, can solve the problem of unknown application effect, and achieve the effect of reducing scattering attenuation

Active Publication Date: 2017-05-31
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The ultrasonic models based on the attenuation method, including the classic ECAH model and the coupled phase model, have their own scope of application and inevitable defects, and they are all obtained in the case of a planar ultrasonic transducer and in the case of a focused transducer. The effect of the application is unknown

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  • Ultrasonic focused river sediment concentration on-line measurement method
  • Ultrasonic focused river sediment concentration on-line measurement method
  • Ultrasonic focused river sediment concentration on-line measurement method

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Experimental program
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Embodiment Construction

[0056] The present invention will be further described below in conjunction with the accompanying drawings.

[0057] Build a set of ultrasonic focused river sediment concentration online measurement device with focused ultrasonic probe as the core. The ultrasonic focusing type river sediment concentration on-line measuring device includes three modules: a signal generation module, an ultrasonic transducer module and a data acquisition module. The signal generation module includes a signal generator 51 and a power amplifier 52. The ultrasonic transducer module includes a focused ultrasonic transmitting probe 53 and a focused ultrasonic receiving probe 55, and the data acquisition module includes a power amplifier 56 and an oscilloscope 57.

[0058] After the construction is completed, debug the system, and after confirming that it is correct, turn on each switch. The signal generator 51 sends out a burst wave with a frequency of 1.13 MHz and a peak-to-peak value of 2 Vpp as an...

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Abstract

The invention discloses an ultrasonic focused river sediment concentration on-line measurement method which comprises the following steps: setting up a set of ultrasonic focused river sediment concentration on-line measurement devices taking a focused ultrasonic probe as a core; debugging a measurement system before measuring and starting the measurement devices for measuring; performing a symbolic dynamic filter analysis on acquired signals, so as to obtain parameter concentration measure related to river sediment concentration; establishing a relationship diagram between the concentration measure and the river sediment concentration, so as to obtain a measurement model. According to the measurement method disclosed by the invention, the ultrasonic scattering attenuation in the measurement process can be effectively reduced, the sensitivity and the accuracy of the measurement system are improved, the defects of low sensitivity and big error with a part of scope caused by calculation of an attenuation average are improved, and the measurement method can be widely applied to measurement of concentration of suspended sediment in multi-river regions.

Description

technical field [0001] The invention relates to the technical fields of ultrasonic liquid-solid two-phase flow measurement, signal processing and sediment concentration, in particular to an ultrasonic focused online method for measuring river sediment concentration. Background technique [0002] In recent years, the problem of water resources in my country has become increasingly prominent. Whether it is the scarcity of water resources or the problem of pollution, it is necessary to accurately monitor the concentration of particulate matter in water. The content and characteristics of water suspended matter are one of the important parameters to characterize water quality, and are closely related to riverbank vegetation, water conservancy projects, water conservancy machinery, shipping channels, marine ecology, hydrometrics, water body protection, and disaster prevention and mitigation. Its effective measurement has Significance. [0003] At present, the traditional method ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/06
CPCG01N15/06
Inventor 谢代梁夏一丹安雅丽曹永刚徐志鹏
Owner CHINA JILIANG UNIV
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