Liquid waveguide tube, high-temperature probe and ultrasonic Doppler velocimetry
A waveguide and liquid technology, applied in the direction of fluid velocity measurement, instruments, measuring devices, etc., can solve the problems of ultrasonic signal attenuation, measurement depth limitation, etc., and achieve the effect of improving signal-to-noise ratio and delay effect
Inactive Publication Date: 2017-08-18
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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However, the extension of the waveguide length will also lead to the attenuation of the ultrasonic signal, so that the measurement depth is greatly limited when measuring the fluid velocity field
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[0031] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0032] Please refer to figure 1 , figure 1 It is a structural schematic diagram of a specific embodiment of the liquid waveguide provided by the present invention.
[0033] Such as figure 1 As shown, the present invention provides a liquid waveguide 1, comprising a circumferential shell 11 and a front wall 12 and a rear wall 13 that seal the axial ends of the circumferential shell 11. The circumferential shell 11 is connected to the front wall 12 and the rear wall 13 A cavity is enclosed, and the inside of the cavity is filled with a liquid medium 14 capable of transmitting ultrasonic waves.
[0034] The above-mentioned "full" means that the liquid medium 14 has filled the above-mentioned cavity, and there are no air b...
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Abstract
The present invention discloses a liquid waveguide tube, a high-temperature probe and an ultrasonic Doppler velocimetry. The liquid waveguide tube comprises a circumferential housing and a front wall and a back wall configured to seal two end of the axial direction of the circumferential housing, the circumferential housing, the front wall and the back wall form a cavity through enclosure, and the cavity is filled with liquid medium capable of transmission of supersonic wave. Because the supersonic wave is low in propagation speed in the liquid medium, on the premise that reflection supersonic wave signals and noise have the same path difference, when the reflection supersonic wave signals and the noise are propagated in the liquid waveguide tube provided by the invention, the time difference of a receiving device receiving the reflection supersonic wave signals and the noise can be increased, the delay effect of the noise is more obvious to more facilitate obtaining pure reflection supersonic wave signals so as to improve the signal to noise ratio of the reflection supersonic wave signals; and moreover, in the condition that the noise delay time is the same, the length of the liquid waveguide tube can far smaller than the length of a solid waveguide tube to reduce the attenuation of the ultrasonic signals at transmission in the waveguide tube so as to ensure the measurement depth of a fluid velocity field.
Description
technical field [0001] The invention relates to the technical field of high-temperature fluid velocity field measurement, in particular to a liquid waveguide, a high-temperature probe, and an ultrasonic Doppler velocimeter. Background technique [0002] With the continuous consumption of traditional fossil energy and the increasingly prominent problem of environmental pollution, human beings have an increasingly urgent demand for new, clean, safe and reliable energy. At present, nuclear energy is recognized as an energy source that can be applied on a large scale in the world. Among them, the liquid heavy metal reactor is one of the first reactor types that are expected to be commercially applied in the current generation IV reactor system due to its inherent safety and reliability. . [0003] In the application process of liquid heavy metal reactors, the measurement of its velocity field is one of the important parameters for steady-state thermal engineering, transient acc...
Claims
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Login to View More IPC IPC(8): G01P5/24
CPCG01P5/241
Inventor 黄群英朱志强黄少球李春京黄望哩
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI