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Calibration Method Using Acoustic Reflection Catheter Phase Calibration System

A phase calibration and waveguide technology, applied in the field of acoustics, can solve the problems of component aging and the decline of experimental accuracy of acoustic experimental devices, and achieve the effect of improving accuracy

Active Publication Date: 2019-01-29
OCEAN UNIV OF CHINA
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  • Abstract
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Problems solved by technology

However, as the use time increases, the internal components of these acoustic experimental devices will age, resulting in a decrease in the experimental accuracy of these acoustic experimental devices

Method used

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  • Calibration Method Using Acoustic Reflection Catheter Phase Calibration System
  • Calibration Method Using Acoustic Reflection Catheter Phase Calibration System
  • Calibration Method Using Acoustic Reflection Catheter Phase Calibration System

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Embodiment Construction

[0040] In order to make the purpose, technical solution and advantages of the invention clearer, the invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the invention, not to limit the invention.

[0041] Such as figure 1 , figure 2 and image 3As shown, an acoustic reflection guide phase calibration system includes a waveguide 1, one end of the waveguide 1 is docked with one end of the acoustic reflection guide 6 to be calibrated, and the centerline of the waveguide 1 and the centerline of the acoustic reflection guide 6 are coincidently arranged. An incident wave generating module is provided at the other end of the waveguide 1, and the incident wave generating module generates an incident wave whose frequency is lower than the cut-off frequency of the waveguide 1; the incident wave enters from the other end of the wa...

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Abstract

The invention discloses a sound wave reflection conduit phase calibration system and method. The calibration system comprises a wave conduit, an incident wave generating module and a calibration data acquisition module. The calibration method mainly comprises that the incident wave generating module generates an incident wave; the incident wave is transferred from the wave conduit to a sound wave reflection conduit; the incident wave is reflected at the movable plug of the sound wave reflection conduit to form a reflected wave; and the reflected wave is superposed on the incident wave along the transmission path of the incident wave. The calibration data acquisition module calculates a reflection coefficient after obtaining the sound pressure of two microphones arranged on the wave conduit, calculates the actual length of the sound wave reflection conduit according to a reflection system, and compares the actual length with the theoretical length of the sound wave reflection conduit to obtain calibration data for calibrating the sound wave reflection conduit. Therefore, the sound wave reflection conduit phase calibration system can conveniently, quickly and accurately perform the calibration of the sound wave reflection conduit.

Description

technical field [0001] The invention relates to the technical field of acoustics, in particular to a calibration method applied to a calibration system of an acoustic experimental instrument actively controlled by a phase difference. Background technique [0002] In the experimental research of physical acoustics, the manipulation of phase difference is an important part of wavefront manipulation. The wave front manipulation technology has made great progress in recent years, and its research value covers many fields such as sound wave focusing, negative reflection, underwater sound field simulation, etc. In other words, experimental instruments for wavefront manipulation—especially those for phase difference manipulation—are widely used in acoustics research today. [0003] At present, physical acoustics research is developing rapidly, and there are more and more acoustic test devices that achieve a certain phase difference between the reflected wave and the incident wave ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D18/00
CPCG01D18/00
Inventor 牛小宇武凯张鑫
Owner OCEAN UNIV OF CHINA
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