CN103760524A - System for detecting non-stationary acoustic source based on near-field acoustical holography technology - Google Patents
System for detecting non-stationary acoustic source based on near-field acoustical holography technology Download PDFInfo
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- CN103760524A CN103760524A CN201310725608.6A CN201310725608A CN103760524A CN 103760524 A CN103760524 A CN 103760524A CN 201310725608 A CN201310725608 A CN 201310725608A CN 103760524 A CN103760524 A CN 103760524A
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- sound source
- acoustic emission
- host computer
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- source based
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/18—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using ultrasonic, sonic, or infrasonic waves
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention discloses a system for detecting a non-stationary acoustic source based on a near-field acoustical holography technology. The system is characterized by sequentially comprising an acoustic emission sensor array, a broadband acoustic emission pre-amplifier, an AD converter, a DSP, an upper computer and a graphic displayer. Acoustic source recognition algorithm analysis and processing software is operated in the upper computer. The non-stationary acoustic source is positioned through the near-field acoustical holography technology, the position and the characteristics of the non-stationary acoustic source can be accurately measured, and therefore convenience is provided for effective control over noise.
Description
Technical field
The present invention relates to a kind of system that detects non-stationary sound source based on Nearfield acoustic holography.
Background technology
From the angle of environmental protection, every people of impact normally learn, and the every people of sound of work and rest, at some occasion " unwanted sound ", are referred to as noise.As the roar of machine, the motor sound of the various vehicles, the sound of blowing a whistle, people's brouhaha and the sound of various bursts etc., be all called noise.In order effectively to control noise, before noise reduction measure is implemented, must judge accurately position and the characteristic of sound source.Adopt Nearfield acoustic holography to detect the system of non-stationary sound source, not yet find similarly report.
Summary of the invention
The technical problem to be solved in the present invention is the defect that overcomes prior art, and a kind of system that detects non-stationary sound source based on Nearfield acoustic holography is provided.
In order to solve the problems of the technologies described above, the invention provides following technical scheme:
A kind of system that detects non-stationary sound source based on Nearfield acoustic holography of the present invention, it is characterized in that, comprise the calibrate AE sensor array, broadband acoustic emission preamplifier, AD converter, DSP processor, host computer and the graphic alphanumeric display that connect successively, in host computer, move identification of sound source Algorithm Analysis process software.
Further, described calibrate AE sensor array gathers acoustic emission signal, after broadband acoustic emission preamplifier amplifies also filtering processing, enter AD converter and carry out multiple signals conversion, AD converter translation data is also imported dsp processor into, data upload host computer after treatment, host computer be take LABVIEW as software platform, carry out data analysis processing, complete the reconstruction to sound source, this sound field information is shown by the mode of figure, with the position of location acoustic emission source, judgement non-stationary sound source is coerced degree.
Further, described calibrate AE sensor and broadband acoustic emission preamplifier selective resonance frequency 70kHz and more than, and it is separated with signal to adopt high-pass filtering circuit to carry out power supply.
The beneficial effect that the present invention reaches is:
The present invention carries out the location of non-stationary sound source by Nearfield acoustic holography, can measure accurately position and the characteristic of non-stationary sound source, for effectively controlling noise, provides convenience.
Embodiment
Below the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein, only for description and interpretation the present invention, is not intended to limit the present invention.
A kind of system that detects non-stationary sound source based on Nearfield acoustic holography of the present invention, it is characterized in that, comprise the calibrate AE sensor array, broadband acoustic emission preamplifier, AD converter, DSP processor, host computer and the graphic alphanumeric display that connect successively, in host computer, move identification of sound source Algorithm Analysis process software.
Described calibrate AE sensor array gathers acoustic emission signal, after broadband acoustic emission preamplifier amplifies also filtering processing, enter AD converter and carry out multiple signals conversion, AD converter translation data is also imported dsp processor into, data upload host computer after treatment, host computer be take LABVIEW as software platform, carry out data analysis processing, complete the reconstruction to sound source, this sound field information is shown by the mode of figure, with the position of location acoustic emission source, judgement non-stationary sound source is coerced degree.
Described calibrate AE sensor and broadband acoustic emission preamplifier selective resonance frequency 70kHz and more than, and it is separated with signal to adopt high-pass filtering circuit to carry out power supply.
The present invention carries out the location of non-stationary sound source by Nearfield acoustic holography, can measure accurately position and the characteristic of non-stationary sound source, for effectively controlling noise, provides convenience.
Finally it should be noted that: the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although the present invention is had been described in detail with reference to previous embodiment, for a person skilled in the art, its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (3)
1. a system that detects non-stationary sound source based on Nearfield acoustic holography, it is characterized in that, comprise the calibrate AE sensor array, broadband acoustic emission preamplifier, AD converter, DSP processor, host computer and the graphic alphanumeric display that connect successively, in host computer, move identification of sound source Algorithm Analysis process software.
2. the system that detects non-stationary sound source based on Nearfield acoustic holography according to claim 1, it is characterized in that, described calibrate AE sensor array gathers acoustic emission signal, after broadband acoustic emission preamplifier amplifies also filtering processing, enter AD converter and carry out multiple signals conversion, AD converter translation data is also imported dsp processor into, data upload host computer after treatment, host computer be take LABVIEW as software platform, carry out data analysis processing, complete the reconstruction to sound source, this sound field information is shown by the mode of figure, position with location acoustic emission source, judgement non-stationary sound source is coerced degree.
3. the system that detects non-stationary sound source based on Nearfield acoustic holography according to claim 1, it is characterized in that, described calibrate AE sensor and broadband acoustic emission preamplifier selective resonance frequency 70kHz and more than, and it is separated with signal to adopt high-pass filtering circuit to carry out power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310725608.6A CN103760524A (en) | 2013-12-25 | 2013-12-25 | System for detecting non-stationary acoustic source based on near-field acoustical holography technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310725608.6A CN103760524A (en) | 2013-12-25 | 2013-12-25 | System for detecting non-stationary acoustic source based on near-field acoustical holography technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103760524A true CN103760524A (en) | 2014-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310725608.6A Pending CN103760524A (en) | 2013-12-25 | 2013-12-25 | System for detecting non-stationary acoustic source based on near-field acoustical holography technology |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4412147A (en) * | 1979-11-26 | 1983-10-25 | Kureha Kagaku Kogyo Kabushiki Kaisha | Ultrasonic holography imaging device having a macromolecular piezoelectric element transducer |
| JPS6358484A (en) * | 1986-08-29 | 1988-03-14 | Yokogawa Medical Syst Ltd | Ultrasonic holography device |
| CN1487500A (en) * | 2003-06-19 | 2004-04-07 | 上海交通大学 | Near field acoustic holographic method of disting uishing non-stationary sound source |
| CN101865789A (en) * | 2010-06-30 | 2010-10-20 | 上海交通大学 | Fault detecting device of near field acoustic holography sound image mode identification and detecting method thereof |
-
2013
- 2013-12-25 CN CN201310725608.6A patent/CN103760524A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4412147A (en) * | 1979-11-26 | 1983-10-25 | Kureha Kagaku Kogyo Kabushiki Kaisha | Ultrasonic holography imaging device having a macromolecular piezoelectric element transducer |
| JPS6358484A (en) * | 1986-08-29 | 1988-03-14 | Yokogawa Medical Syst Ltd | Ultrasonic holography device |
| CN1487500A (en) * | 2003-06-19 | 2004-04-07 | 上海交通大学 | Near field acoustic holographic method of disting uishing non-stationary sound source |
| CN101865789A (en) * | 2010-06-30 | 2010-10-20 | 上海交通大学 | Fault detecting device of near field acoustic holography sound image mode identification and detecting method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 李青: "基于LabVIEW的近场声全息噪声源识别系统", 《中国优秀硕士学位论文全文数据 工程科技Ⅱ辑》 * |
| 钱鸣佳: "基于神经网络声全息技术对运动噪声源识别的研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
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Application publication date: 20140430 |