CN2821546Y - Acoustic image measurer - Google Patents
Acoustic image measurer Download PDFInfo
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- CN2821546Y CN2821546Y CN 200520043287 CN200520043287U CN2821546Y CN 2821546 Y CN2821546 Y CN 2821546Y CN 200520043287 CN200520043287 CN 200520043287 CN 200520043287 U CN200520043287 U CN 200520043287U CN 2821546 Y CN2821546 Y CN 2821546Y
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- acoustic image
- measurement
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Abstract
The utility model relates to an acoustic image measurer composed of a measurement transducing mechanism and a measurement analysis mechanism. The utility model is characterized in that the measurement transducing mechanism comprises a curved surface reflector and a mike set which is arranged on the imaging focus of the curved surface reflector. The measurement analysis mechanism comprises an ADC data acquisition card and a computer. The input terminal of the ADC data acquisition card is connected with the signal end of the mike in the mike set and the output terminal is connected with the computer. The utility model can conduct non-contact type measurement when the utility model leaves the real position of a soniferous object. The measurement analysis work is high efficient and the result is accurate, and the utility model is particularly suitable for the research work of distant and fine measurable noise sources.
Description
Technical field
The utility model relates to a kind of surveying instrument, relates in particular to a kind of acoustic image measuring instrument of measurement mechanical noise source sounding.
Background technology
In order to study the phenomenon with measurement mechanical noise source sounding, prior art adopts following way usually:
A kind of method is, adopts technology such as sheath method, sound intensity technique to measure for the instrument on basis, and the shortcoming of this method is that workload is big and complicated;
Also have a kind of method to be, adopt camber reflection to arrange that at the focus place microphone carries out non-contacting measurement, but the efficiency of measurement of a microphone is not high.
In addition, the sound of measuring from another focus place at a focus place of elliptical reflecting curved surface is existing technology, but does not see that the report of measuring acoustic image is arranged.
Summary of the invention
The purpose of this utility model is to provide a kind of improved acoustic image measuring instrument, it can be in the phenomenon of utilizing the imaging of sound camber reflection, cooperate electronic measurement technique to carry out the measurement of acoustic image, and measure when can finish the sound field multiple spot, render a service to reach higher measurement.
The purpose of this utility model is achieved in that
A kind of acoustic image measuring instrument is formed by measuring sensing mechanism and Measurement and analysis mechanism; Be characterized in:
Described measurement sensing mechanism comprises curved surface reflector and microphone group, and microphone group is arranged on the one-tenth image focus place of curved surface reflector;
Described Measurement and analysis mechanism comprises adc data capture card and computing machine, and the input end of adc data capture card links to each other with each microphone signal in the microphone group, and output terminal connects computing machine.
In above-mentioned acoustic image measuring instrument, wherein, described curved surface reflector is the oval calotte reverberator, and belonging to the transverse is an oval end curved surface in axle center.
In above-mentioned acoustic image measuring instrument, wherein, long 2 meters of the transverse under the described oval calotte reverberator, 1 meter of bifocal distance, 1 meter of reverberator bore.
In above-mentioned acoustic image measuring instrument, wherein, described microphone group comprises 16 microphones, and 16 microphones are pressed equilateral triangle and arranged compact arrangement in same plane, and are arranged on the acoustic image focus place of curved surface reflector perpendicular to transverse.
In above-mentioned acoustic image measuring instrument, wherein, the spacing in the described microphone group between each adjacent microphone is 70 millimeters.
The utility model acoustic image measuring instrument makes it compared with prior art owing to adopted above-mentioned technical scheme, has tangible advantage and good effect.The utility model acoustic image measuring instrument can carry out non-contact measurement leaving the physical location of sound producing body, the Measurement and analysis efficient work, and the result is accurate, is particularly suitable for noise source research work remote, meticulous measurement; Be applicable to noises such as measuring blower fan, compressor, engine, pump, pipeline, sound suppressor, vehicle structure, building workshop, machine room, sound insulating structure, carry out the sound source analysis and research.
Description of drawings
By the description of a following embodiment to the utility model acoustic image measuring instrument, can further understand the purpose of this utility model, specific structural features and advantage in conjunction with its accompanying drawing.Wherein, accompanying drawing is:
Fig. 1 is the structural representation of the utility model acoustic image measuring instrument;
Fig. 2 is the structural representation of the measurement sensing mechanism in the utility model;
Fig. 3 is the microphone group in the utility model and the structural representation of mounting bracket thereof;
Fig. 4 is for focusing on camber reflection acoustic imaging schematic diagram;
Fig. 5 is the Measurement and analysis schematic diagram of the utility model acoustic image measuring instrument;
Fig. 6 is many measurements face array mode synoptic diagram.
Embodiment
See also illustrated in figures 1 and 2ly, they are the utility model structure and the structural representation of measuring sensing mechanism.The utility model acoustic image measuring instrument is formed by measuring sensing mechanism and Measurement and analysis mechanism; Wherein, measure sensing mechanism and comprise curved surface reflector 1 and microphone group 2, Measurement and analysis mechanism comprises adc data capture card 3 and computing machine 4.Microphone group 2 is arranged on the acoustic image focus place of curved surface reflector 1; The input end of adc data capture card 3 links to each other with each microphone signal in the microphone group, and output terminal connects computing machine 4.Label 5 is an acoustic image among Fig. 1, and label 6 is a noise source.
See also Fig. 2 and shown in Figure 4, the curved surface reflector 1 in the utility model just can adopt circle, also can adopt oval; What adopt in the present embodiment is oval calotte reverberator 1, and belonging to the transverse is an oval end curved surface in axle center; Long 2 meters of transverse under this oval calotte reverberator, 1 meter of bifocal distance, 1 meter of reverberator bore.Oval calotte reverberator 1 be positively connected with A-frame 11, be connected with the microphone group support 12 that is used to install microphone group 2 at the front end of A-frame 11, be connected with fixed support 13 at the back side of oval calotte reverberator 1.
Please in conjunction with Fig. 2 referring to Fig. 3 and shown in Figure 6, microphone group 2 in the utility model comprises 16 microphones 21,16 microphones are pressed equilateral triangle and are arranged that compact arrangement is in same plane, by microphone group support 22 stationary positioned, the cable of 16 microphones 21 links to each other with the input end of 16 passage adc data capture cards 3 respectively, forms 16 passage microphones.Microphone group 2 is arranged on the one-tenth image focus place of curved surface reflector perpendicular to transverse.Adopted 16 Bi Kai companies, 4155 type microphones in the present embodiment, the spacing in the microphone group between each adjacent microphone is 70 millimeters.
When the tested surface scope is bigger, need repeatedly to measure in the time of could covering whole tested surface, the microphone group in the utility model 2 can be carried out the multiple measurement of many measurements face by mode shown in Figure 6.
See also shown in Figure 4ly, the acoustic image image-forming principle of the utility model acoustic image measuring instrument is described as follows:
There is a noise source at focus 1 place at the oval calotte reverberator, because the reflection of oval calotte generates corresponding acoustic image at focus 2 places, so focus 2 can be called the acoustic image focus.The curved surface that can focus on arbitrarily on the principle can both catoptric imaging, and the good acoustic image of positive round surface reflected energy generation of a focus is arranged, and has the oval calotte of two focuses then can make sound source and acoustic image that bigger distance is arranged.Image quality is in acoustic image focus place the best, and is poorer from the acoustic image focus distance imaging quality that heals.Because practical application is got into image focus and is made reverberator at the rightabout part curved surface of noise source, produce the acoustic image that dwindles, the size of acoustic image and sound source is than corresponding [(long axis length-focal length)/2) than (focal length+(long axis length-focal length)/2].It is 2 meters that the utility model adopts transverse, and the bifocal distance is 1 meter, and the reverberator bore is 1 meter an oval calotte reverberator, obtains acoustic image and noise source size ratio and be 1: 3 the acoustic image that dwindles.When adopting positive round surface reverberator, the acoustic image that obtains is about 1: 1 with noise source size ratio.
Place the some place at acoustic image focus 2 places, this microphone just to be equivalent to have pressed close to measure the voice signal of this point in the microphone of measuring voice signal at focus 1 place of noise source correspondence.When near the acoustic image focus, arranging that a plurality of microphones are measured simultaneously, just can measure the acoustic image of noise source.The utility model is exactly the microphone group of being made up of 16 microphones of having utilized this principle design.Microphone in the microphone group can measured noise sound be dynamic, the small size microphone of the arbitrary form of frequency range with adapting to.Because the line of the vertical bifocal of most of sound sources, the microphone group in the utility model are arranged on the plane of the vertical bifocal line in acoustic image focus place.
Measurement and analysis mechanism adopts computing machine and the data processing software of being furnished with 16 channel data capture cards, the information that records has promptly been obtained showing with image format the acoustic image of sound source information by the position display of corresponding microphone.
See also shown in Figure 6ly, Measurement and analysis principle of the present utility model is described as follows:
The signal of 16 passage microphones is inserted the 16 passage adc data capture cards formation digital signal that is inserted in the computing machine, and computing machine processes digital signals into amplitude, and the position display that distributes by each microphone becomes ultrasonogram.Fig. 5 has shown that the computing machine in the Measurement and analysis mechanism will be arranged in the noise signal that the microphone of point position (point of crossing) measures, and presses the microphone coordinate and arranges, and shows the data of each point, reappears the noise source image, finishes the process that acoustic image is handled.Wherein, noise data is handled and can be adopted methods such as conventional total value detection, frequency component detection to carry out.
Claims (5)
1. an acoustic image measuring instrument is formed by measuring sensing mechanism and Measurement and analysis mechanism; It is characterized in that:
Described measurement sensing mechanism comprises curved surface reflector (1) and microphone group (2), and microphone group (2) is arranged on the one-tenth image focus place of curved surface reflector (1);
Described Measurement and analysis mechanism comprises adc data capture card (3) and computing machine (4), and the input end of adc data capture card (3) links to each other with each microphone signal in the microphone group (2), and output terminal connects computing machine (4).
2. acoustic image measuring instrument as claimed in claim 1 is characterized in that: described curved surface reflector (1) is the oval calotte reverberator, and belonging to the transverse is an oval end curved surface in axle center.
3. acoustic image measuring instrument as claimed in claim 2 is characterized in that: long 2 meters of the transverse under the described oval calotte reverberator (1), 1 meter of bifocal distance, 1 meter of reverberator bore.
4. acoustic image measuring instrument as claimed in claim 1, it is characterized in that: described microphone group (2) comprises 16 microphones, 16 microphones are pressed equilateral triangle and are arranged compact arrangement in same plane, and are arranged on the acoustic image focus place of curved surface reflector perpendicular to transverse.
5. acoustic image measuring instrument as claimed in claim 4 is characterized in that: the spacing in the described microphone group (2) between each adjacent microphone is 70 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520043287 CN2821546Y (en) | 2005-07-11 | 2005-07-11 | Acoustic image measurer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520043287 CN2821546Y (en) | 2005-07-11 | 2005-07-11 | Acoustic image measurer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2821546Y true CN2821546Y (en) | 2006-09-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520043287 Expired - Fee Related CN2821546Y (en) | 2005-07-11 | 2005-07-11 | Acoustic image measurer |
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| Country | Link |
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| CN (1) | CN2821546Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106124040A (en) * | 2016-05-18 | 2016-11-16 | 萨姆株式会社 | Noise source visualization data accumulation display packing, data processing equipment and acoustical camera system |
| CN107316545A (en) * | 2017-09-05 | 2017-11-03 | 河南科技大学 | A kind of varifocal sound focusing apparatus for demonstrating and method |
-
2005
- 2005-07-11 CN CN 200520043287 patent/CN2821546Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106124040A (en) * | 2016-05-18 | 2016-11-16 | 萨姆株式会社 | Noise source visualization data accumulation display packing, data processing equipment and acoustical camera system |
| CN107316545A (en) * | 2017-09-05 | 2017-11-03 | 河南科技大学 | A kind of varifocal sound focusing apparatus for demonstrating and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060927 Termination date: 20100711 |