Pipeline fluid noise auxiliary measuring device

A technology of noise assistance and measurement device, applied in the direction of measurement device, measurement of ultrasonic/sonic/infrasonic waves, instruments, etc., can solve the problems of poor measurement accuracy, difficulty in judging pipeline water noise and its changing propagation law, etc., to achieve flexible use, Simple structure, reducing the effect of reflection

Active Publication Date: 2007-01-03
CHINA SHIP DEV & DESIGN CENT
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AI Technical Summary

Problems solved by technology

Setting sensors directly in the pipeline is a commonly used measurement method in the past, but the signal measured by this method is a composite signal of water noise and pressure fluctuations in the pipeline, and there are inevitably "false sounds" in the measurement results. The interference of noise signals makes the measurement accuracy poor, and it is difficult to judge the actual water noise in the pipeline and its change propagation law

Method used

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  • Pipeline fluid noise auxiliary measuring device
  • Pipeline fluid noise auxiliary measuring device

Examples

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Embodiment Construction

[0012] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0013] The first example is figure 1 As shown, there is a barrel-shaped sound-conducting water tank 2. The bottom of the sound-conducting water tank is provided with connecting slots with the same width as the diameter of the pipe to be tested. Semicircular holes are set at both ends of the connecting slot to match the pipe to be tested. The connecting slots The connection and containment surface of the transverse section of the outer pipe wall of the round pipe is equal to half the cross section of the round pipe. The connecting slot of the sound conduction water tank is welded together with the outer pipe wall of the tested pipe 1 to form a fixed and sealed connection structure. The sound conduction water tank consists of It is made of metal material, and the bottom of the inner wall of the water tank and its surroundings are lined with a sound-absorbi...

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Abstract

The pipeline liquid yawp assistant measuring equipment relates to barrel sound transmission water tank. There is joining slot on its bottom, and the joining slot tallies with pipe under test and sealed connects with outside pipe wall. Hydrophone suspends in the sound transmission water tank. It can eliminate infection to measure water yawp by the pipe liquid pressure flutter and directly measure the sound signal in pipe to solve the problem to pick up water signal in the mixing liquid coming from pipe pressure flutter and water yawp signal. It is important to research the yawp of the inner liquid and rule for changing and diffusing, and the dropped yawp and concealed body of the boat. It is fit for testing pipe liquid yawp to existing and built pipe. The sound absorption layer inside the sound transmission water tank reduces the reflect effect of sound wave and keep the linearity and veracity to the measuring data.

Description

technical field [0001] The invention belongs to devices related to acoustic measurement technology, in particular to an auxiliary measurement device for pipeline fluid noise. Background technique [0002] The pipes of the boat are one of the sources of underwater noise from the boat. The water noise in the fluid in the pipeline of the ship is an effective component of the noise radiated directly to the outside. The fluid in the pipeline will generate water noise after being stimulated by itself and the outside, and propagate outward. At the same time, the pressure of the fluid also produces pressure pulsation due to the change of the cross section of the flow channel and the influence of the roughness of the pipe wall. In the pipeline, the water noise and pressure pulsation of the fluid exist in the form of dynamic pressure, and both can propagate along the fluid in the pipeline, and it is difficult to separate them in the pipeline. But the changes and propagation laws of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H17/00
Inventor 梁向东谢华孙晓晖周轶美王崇珲赵淑琴
Owner CHINA SHIP DEV & DESIGN CENT
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