CN204422061U - Acoustical power testing jig - Google Patents
Acoustical power testing jig Download PDFInfo
- Publication number
- CN204422061U CN204422061U CN201520147841.5U CN201520147841U CN204422061U CN 204422061 U CN204422061 U CN 204422061U CN 201520147841 U CN201520147841 U CN 201520147841U CN 204422061 U CN204422061 U CN 204422061U
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- arc section
- hole
- testing jig
- acoustical power
- power testing
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Abstract
Acoustical power testing jig, comprise multiple arc section and positioning disc, the upper end of arc section is all detachable with positioning disc to be connected and to distribute the hemispherical acoustical power testing jig formed under shed along the outer rim uniform intervals of positioning disc, it is characterized in that several installation through holes of the circular arc directional spreding described arc section had along described arc section, the direction, axis of described installation through hole is consistent with the radial direction of described acoustical power testing jig, described acoustical power testing jig also comprises microphone fixed bar, described microphone fixed bar passes described installation through hole and described arc section is removable fixing.The acoustical power testing jig that the utility model provides, transport, deposit and conveniently with routine use can meet the anechoic room of different free field radius or the requirement of semianechoic room acoustical testing, the adaptability of acoustical power testing jig is higher, can test accurately in the anechoic room or half of different free field radius is eliminated the noise to sound source.
Description
Technical field
The utility model relates to sound power measurement technical field, particularly a kind of acoustical power testing jig of adjustable testing radius.
Background technology
Free field radius refers to that On Acoustic Wave Propagation Character meets inverse square law substantially within the scope of certain critical distance, and namely distance doubles, and sound pressure level reduces 6dB, then this critical distance is called free field radius.Anechoic room or semianechoic room are the special experimental laboratories of acoustical testing, different anechoic rooms or semianechoic room have different free field radiuses, when testing the acoustical power of a certain sound source, sound source is placed in and disappears in room sound or semianechoic room, measure the acoustic pressure of the some distributed points on the hemisphere face centered by sound source, and then try to achieve sound power level, and the hemispherical radius that some distributed points form and testing radius must be less than the accuracy of the free field radius guarantee sound power measurement of this anechoic room or semianechoic room, dome-type acoustical power testing jig distribution integral structure common in prior art and Demountable, there is transport in the acoustical power testing jig of integral structure, deposit inconvenience, and its testing radius cannot change, when testing radius be greater than anechoic room or the free field radius of the room that partly disappears time, the true parasexuality of test of acoustical power testing jig is not ensured, can not use, therefore the acoustical power testing jig of integral structure can only be greater than anechoic room or the semianechoic room use of acoustical power testing jig testing radius at free field radius, the acoustical testing requirement of the different anechoic room of free field radius or semianechoic room cannot be met.The acoustical power testing jig of demountable structure, overcome the acoustical power testing jig of integral structure in the deficiency of transporting and deposit, but the testing radius of the acoustical power testing jig of existing demountable structure also cannot change, when the testing radius of acoustical power testing jig is greater than the free field radius of anechoic room residing for it or semianechoic room, the accuracy of its acoustical power test also can not be guaranteed, therefore, detachable acoustical power testing jig also cannot meet the acoustical testing requirement of the different anechoic room of free radius or semianechoic room.
Utility model content
The utility model is for the deficiencies in the prior art, the acoustical power testing jig that the utility model provides, transport, deposit and conveniently with routine use can meet the anechoic room of different free field radius or the requirement of semianechoic room acoustical testing, the adaptability of acoustical power testing jig is higher, can test accurately in the anechoic room or half of different free field radius is eliminated the noise to sound source.
The technical scheme provided for reaching above object the utility model is: acoustical power testing jig, comprise multiple arc section and positioning disc, the upper end of arc section is all detachable with positioning disc to be connected and to distribute the hemispherical acoustical power testing jig formed under shed along the outer rim uniform intervals of positioning disc, it is characterized in that several installation through holes of the circular arc directional spreding described arc section had along described arc section, the direction, axis of described installation through hole is consistent with the radial direction of described acoustical power testing jig, described acoustical power testing jig also comprises microphone fixed bar, described microphone fixed bar passes described installation through hole and described arc section is removable fixing.
Further, described arc section is set with reinforcing pipe, the inner wall shape of described reinforcing pipe is identical with the outer wall shape of described arc section, described reinforcing pipe is sleeved on the position described arc section having described installation through hole, described reinforcing pipe has the reinforcing pipe through hole corresponding with described installation through hole.
Further, the tube wall of described reinforcing pipe has the tapped through hole along described reinforcing pipe wall thickness direction, described tapped through hole is perpendicular to described reinforcing pipe through hole, described arc section has the threaded hole docked with described tapped through hole, described tapped through hole and threaded engagement equal with described threaded hole aperture, lock-screw is screwed in described tapped through hole and also leans through the outer wall of described threaded hole and described microphone fixed bar, is fixed on described arc section by described microphone fixed bar.
Further, the upper end of described positioning disc and described arc section is by the detachable connection of clamping assembly, described clamping assembly comprise connect card article and with the fastening draw-in groove being connected card article and matching, described connection card article welds with described positioning disc, and described fastening draw-in groove is opened in the upper end of described arc section.
Further, offer through hole at described connection card article and fastening draw-in groove clamping place along the Width of described fastening draw-in groove, bolt assembly will connect the upper end locking of fixture block and described arc section through described through hole.
Further, described arc section is tubular type arc section.
Further, the quantity of described arc section is six, and described installation through hole is three or four along the quantity of the circular arc directional spreding of described arc section.
The beneficial effects of the utility model are: the positioning disc of acoustical power testing jig of the present utility model and arc section are detachable connection, microphone fixed bar and arc section are removable fixing, the dismounting of acoustical power testing jig can be decomposed in transport with when depositing, reduce it taken up space, conveniently transport and deposit, arc section has several installation through holes of the circular arc directional spreding along arc section, microphone fixed bar passes installation through hole and arc section is removable fixing, the axis of wherein installing through hole is consistent with the radial direction of acoustical power testing jig, microphone fixed bar is fixed on after on arc section through installing through hole, the centre of sphere of acoustical power testing jig is pointed in one end of microphone fixed bar, to be regulated to the distance of the acoustical power testing jig centre of sphere by regulate microphone fixed bar and the removable fixing position of arc section namely to regulate microphone fixed bar to point to one end that acoustical power surveys the formula frame centre of sphere and be fixed on the distance of microphone to the acoustical power testing jig centre of sphere that microphone fixed bar points to one end of the acoustical power testing jig centre of sphere, different testing radius is obtained under the condition of acoustical power testing jig monnolithic case size constancy, when acoustical power testing jig is placed in different anechoic rooms or semianechoic room, acoustical power testing jig can obtain different testing radius, ensure that the testing radius of acoustical power testing jig is less than the free field radius of anechoic room or semianechoic room all the time, ensure the accuracy of test, meet the anechoic room of different free field radius or the requirement of semianechoic room acoustical testing, the adaptability of acoustical power testing jig is higher, can test accurately sound source in the anechoic room or half of different free field radius is eliminated the noise.The setting range of testing radius is determined by the length of microphone fixed bar, only the removable fixing position of microphone fixed bar and arc section need be regulated just can to obtain different testing radius, the routine use of acoustical power is flexible, arc section arranges several positioning through hole and ensure that acoustical power testing jig has good measuring accuracy.
Accompanying drawing explanation
Fig. 1 be wherein two the structural representation inserting the acoustical power testing jig of microphone fixed bar is installed in through holes.
Fig. 2 is the planar structure schematic diagram that in embodiment, positioning disc is connected with arc section.
Fig. 3 is the removable fixing structural representation of microphone fixed bar and arc section.
Fig. 4 is the structural representation that reinforcing pipe is sleeved on arc section.
Fig. 5 is the close-up schematic view of the arc section installing through hole place.
Fig. 6 is the syndeton schematic diagram of positioning disc and arc section upper end.
Embodiment
To be further described the utility model by drawings and Examples below.
As shown in Figures 1 to 6, acoustical power testing jig, comprise six arc sections 1 and positioning disc 2, arc section 1 is formed to the hemispherical acoustical power testing jig of under shed along the outer rim uniform intervals distribution of positioning disc 2, the upper end of described positioning disc 2 and described arc section 1 is by the detachable connection of clamping assembly, described clamping assembly comprise connect card article 21 and with the fastening draw-in groove 13 being connected card article 21 and matching, described connection card article 21 welds with described positioning disc 21, and described fastening draw-in groove 13 is opened in the upper end of described arc section 1.Offer through hole at described connection card article 21 and fastening draw-in groove 13 clamping place along the Width of described fastening draw-in groove 13, bolt assembly 6 will connect the upper end locking of fixture block 21 and described arc section 1 through described through hole.Described arc section 1 has three installation through holes 11 of the circular arc directional spreding along described arc section 1, the direction, axis of described installation through hole 11 is consistent with the radial direction of described acoustical power testing jig, reinforcing pipe 4 is sleeved on the position described arc section 1 having described installation through hole 11, the inner wall shape of described reinforcing pipe 4 is identical with the outer wall shape of described arc section 1, and described reinforcing pipe 4 has the reinforcing pipe through hole 41 corresponding with described installation through hole 11.The tube wall of described reinforcing pipe 4 has the tapped through hole 42 along described reinforcing pipe 4 wall thickness direction, described tapped through hole 42 is perpendicular to described reinforcing pipe through hole 41, described arc section 1 has the threaded hole 12 docked with described tapped through hole 42, described tapped through hole 42 and threaded engagement equal with described threaded hole 12 aperture, microphone fixed bar 3 is through described installation through hole 11, lock-screw 5 to be screwed in described tapped through hole 42 and to lean through described threaded hole 12 and the outer wall of described microphone fixed bar 3 and to be fixed on described arc section 1 by described microphone fixed bar 3.Described arc section 1 is tubular type arc section, and the arc section shape stability of tubular type is good, can be assembled into dimensionally stable and firmly semisphere acoustical power testing jig easily.
Positioning disc 2 and the arc section 1 of above-mentioned acoustical power testing jig are detachable connection, microphone fixed bar 3 and arc section 1 are removable fixing, the dismounting of acoustical power testing jig can be decomposed in transport with when depositing, reduce it taken up space, conveniently transport and deposit, arc section 1 has 3 installation through holes 11 of the circular arc directional spreding along arc section, microphone fixed bar 3 is through installing through hole 11, microphone fixed bar 3 and arc section 1 are fixed by trip bolt 5 by the arc section position suit reinforcing pipe 4 residing for installation through hole 11, increasing reinforcing pipe 4 makes microphone fixed bar 3 steady with the fixing more reinforcing of arc section 1, after fixing, microphone fixed bar 3 not easily drops from arc section 1, the axis of wherein installing through hole 11 is consistent with the radial direction of acoustical power testing jig, the centre of sphere of acoustical power testing jig is pointed in one end of microphone fixed bar 3, lock-screw 5 of outwarding winding regulate the position between microphone fixed bar 3 and arc section 1 namely to regulate microphone fixed bar 3 to point to one end that acoustical power surveys the formula frame centre of sphere regulates to the distance of the acoustical power testing jig centre of sphere and is fixed on the distance of microphone to the acoustical power testing jig centre of sphere that microphone fixed bar 3 points to one end of the acoustical power testing jig centre of sphere, different testing radius is obtained under the condition of acoustical power testing jig monnolithic case size constancy, when acoustical power testing jig is placed in different anechoic rooms or semianechoic room, acoustical power testing jig can obtain different testing radius, ensure that the testing radius of acoustical power testing jig is less than the free field radius of anechoic room or semianechoic room all the time, ensure the accuracy of test, meet the anechoic room of different free field radius or the requirement of semianechoic room acoustical testing, the adaptability of acoustical power testing jig is higher, can test accurately sound source in the anechoic room or half of different free field radius is eliminated the noise.The setting range of testing radius is determined by the length of microphone fixed bar 3, only the removable fixing position of microphone fixed bar 3 and arc section 1 need be regulated just can to obtain different testing radius, the routine use of acoustical power is flexible, arc section arranges several positioning through hole and ensure that acoustical power testing jig has good measuring accuracy.
Below by reference to the accompanying drawings complete description is carried out to the technical scheme of the utility model embodiment, it should be noted that described embodiment is only the utility model part embodiment.Based on the embodiment in the utility model, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belongs to the scope of the utility model protection.
Claims (7)
1. acoustical power testing jig, comprise multiple arc section (1) and positioning disc (2), the upper end of arc section (1) is all detachable with positioning disc (2) to be connected and to distribute the hemispherical acoustical power testing jig formed under shed along the outer rim uniform intervals of positioning disc (2), it is characterized in that several installation through holes (11) of the circular arc directional spreding described arc section (1) had along described arc section (1), the direction, axis of described installation through hole (11) is consistent with the radial direction of described acoustical power testing jig, described acoustical power testing jig also comprises microphone fixed bar (3), described microphone fixed bar (3) is removable fixing through described installation through hole (11) and described arc section (1).
2. acoustical power testing jig according to claim 1, it is characterized in that being set with reinforcing pipe (4) on described arc section (1), the inner wall shape of described reinforcing pipe (4) is identical with the outer wall shape of described arc section (1), described reinforcing pipe (4) is sleeved on the position described arc section (1) having described installation through hole (11), and described reinforcing pipe (4) has the reinforcing pipe through hole (41) corresponding with described installation through hole (11).
3. acoustical power testing jig according to claim 2, it is characterized in that the tapped through hole (42) had on the tube wall of described reinforcing pipe (4) along described reinforcing pipe (4) wall thickness direction, described tapped through hole (42) is perpendicular to described reinforcing pipe through hole (41), described arc section (1) has the threaded hole (12) docked with described tapped through hole (42), described tapped through hole (42) and threaded engagement equal with described threaded hole (12) aperture, lock-screw (5) to be screwed in described tapped through hole (42) and to lean through described threaded hole (12) and the outer wall of described microphone fixed bar (3) and to be fixed on described arc section (1) by described microphone fixed bar (3).
4. acoustical power testing jig according to claim 3, it is characterized in that the upper end of described positioning disc (2) and described arc section (1) is by the detachable connection of clamping assembly, described clamping assembly comprise connect card article (21) and with the fastening draw-in groove (13) being connected card article (21) and matching, described connection card article (21) welds with described positioning disc (21), and described fastening draw-in groove (13) is opened in the upper end of described arc section (1).
5. acoustical power testing jig according to claim 4, is characterized in that at described connection card article (21) and fastening draw-in groove (1
3) clamping place offers through hole along the Width of described fastening draw-in groove (13), and bolt assembly (6) will connect the upper end locking of fixture block (21) and described arc section (1) through described through hole.
6. acoustical power testing jig according to claim 5, is characterized in that described arc section (1) is tubular type arc section.
7. the acoustical power testing jig according to claim 1 to any one of claim 6, the quantity that it is characterized in that described arc section (1) is six, and described installation through hole (1) is three or four along the quantity of the circular arc directional spreding of described arc section (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520147841.5U CN204422061U (en) | 2015-03-16 | 2015-03-16 | Acoustical power testing jig |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520147841.5U CN204422061U (en) | 2015-03-16 | 2015-03-16 | Acoustical power testing jig |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204422061U true CN204422061U (en) | 2015-06-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520147841.5U Expired - Fee Related CN204422061U (en) | 2015-03-16 | 2015-03-16 | Acoustical power testing jig |
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| Country | Link |
|---|---|
| CN (1) | CN204422061U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106454681A (en) * | 2016-12-08 | 2017-02-22 | 上海声望声学科技股份有限公司 | Acoustical power testing support |
| CN107318077A (en) * | 2017-08-23 | 2017-11-03 | 苏州岸肯电子科技有限公司 | A kind of loudspeaker test bracket |
| CN110542477A (en) * | 2019-09-29 | 2019-12-06 | 华南理工大学 | Electronic device noise measurement system based on hemispherical tool |
-
2015
- 2015-03-16 CN CN201520147841.5U patent/CN204422061U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106454681A (en) * | 2016-12-08 | 2017-02-22 | 上海声望声学科技股份有限公司 | Acoustical power testing support |
| CN107318077A (en) * | 2017-08-23 | 2017-11-03 | 苏州岸肯电子科技有限公司 | A kind of loudspeaker test bracket |
| CN110542477A (en) * | 2019-09-29 | 2019-12-06 | 华南理工大学 | Electronic device noise measurement system based on hemispherical tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150624 Termination date: 20200316 |