CN109782230A - A kind of small-sized acoustical holography measurement of free found field and inverting device - Google Patents
A kind of small-sized acoustical holography measurement of free found field and inverting device Download PDFInfo
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- CN109782230A CN109782230A CN201910082823.6A CN201910082823A CN109782230A CN 109782230 A CN109782230 A CN 109782230A CN 201910082823 A CN201910082823 A CN 201910082823A CN 109782230 A CN109782230 A CN 109782230A
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Abstract
A kind of small-sized acoustical holography measurement of free found field of the present invention and inverting device, it is related to a kind of acoustical testing and acoustics inverting device, which includes whole device support adjustment mechanisms I, microphone array longitudinal movement control mechanism II, microphone array rotary motion control mechanism III, microphone array vertical motion control mechanism IV, microphone array transverse movement control mechanism V, microphone correction control mechanism VI, virtual ball setting reference position positioning measurement column VII；The device installation and debugging are all fairly simple, measurement and Inversion Calculation can reduce a large amount of manpower and material resources, the labor intensity of people can be mitigated, the accuracy of the precision of measurement data and the result of Inversion Calculation can be improved, while can especially be suitable for the large-scale freely complicated field operation for stablizing sound field.
Description
Technical field
The present invention relates to a kind of acoustic measurement and inverting device, the small-sized acoustical holography measurement of especially a kind of free found field and anti-
Drill new equipment.
Background technique
Nearfield acoustic holography is the hot spot of acoustic investigation in recent years, can be more smart by Nearfield acoustic holography (NAH)
Identification of sound source and positioning really are carried out, near field sound field rebuilding and visualization, therefore, NAH technology may be implemented with this technology
Research for inhibit noise pollution have very major and immediate significance, the key of NAH technology be how to measure on holographic facet
The distribution of multiple acoustic pressure and how using acoustic pressure multiple on holographic facet to free found field progress acoustics inverting, and existing test device and
For inverting device all than cumbersome, adjustment and installation is all very troublesome, and workload is very big, needs a large amount of manpower and material resources, and
Test result live cannot generally be completed, and Inversion Calculation needs to return to laboratory and handled, it is therefore necessary to invent a kind of small
The new equipment of type, light-weighted novel more holographic tests and inverting, which is not the present invention in corresponding intelligence control system
Emphasis, be not explained in detail here, see the intelligence control system of the device applied on the same day with the present invention) control under, can be from
Dynamic debugging, automatically corrects, automatic to test, and scene is automatic to calculate inversion result, to reduce a large amount of manpower and material resources, mitigates people
Labor intensity, while can especially be suitble to the field operation of large complicated free and stable sound field.
Summary of the invention
The purpose of the present invention is defect of the thorium to the prior art to mention, and tests for a kind of small-sized, light-weighted new acoustic pressure
And acoustics inverting device, the device installation and debugging are all fairly simple, and when measurement can carry out the selection of various holographic facets, measurement
A large amount of manpower and material resources can be reduced when with acoustics inverting, the labor intensity of people can be mitigated, while adopting when DATA REASONING
With new correction and calculation method, the precision of measurement data is substantially increased, in addition measurement uses embedded with inverting device
System can be such that device is made very small, especially in embedded systems use parallel processing technique, can scene counted
It calculates as a result, so can not be suitble to field operation.
In order to achieve the above objectives, the technical solution adopted by the present invention is that: the small-sized acoustical holography measurement of a kind of free found field and anti-
Device is drilled, which includes whole device support adjustment mechanisms I, microphone array longitudinal movement control mechanism II, microphone array
Column rotary motion control mechanism III, microphone array vertical motion control mechanism IV, microphone array transverse movement control mechanism
V, reference position positioning measurement column VII is arranged in microphone correction control mechanism VI, virtual ball；The whole device supports adjustment
Mechanism I includes adjusting support I, adjusting support II, adjust support III, and three adjusting supports pass through respective lead screw motor respectively
It is connected with the screw hole on base plate, base plate is equipped with fixed weight rotary table, and fixed weight rotary table is fixed on base plate, pedestal
Level sensor K1, level sensor K2, fixed weight rotary table upper surface and vertical support bar phase are additionally provided on plate
Even, vertical support bar upper end is connected with longitudinal direction and rotary motion component mounting platform, and vertical support bar upper end is additionally provided with laser and connects
Device is received, longitudinal direction and rotary motion component mounting platform side are equipped with electric appliance box and liquid crystal micro shows touch screen；Described is transaudient
Device array rotation motion control mechanism III includes the first stepper motor being located at below longitudinal direction and rotary motion component mounting platform
D1, second stepper motor D2, the first stepper motor D1 by bearing be located at the upper of longitudinal direction and rotary motion component mounting platform
The one of gear of heteromorphic teeth wheel set I is connected, and second stepper motor D2 passes through another gear phase of bearing and heteromorphic teeth wheel set I
Even, heteromorphic teeth wheel set I by be located at the mechanical connection component of longitudinal direction and rotary motion component mounting platform respectively with longitudinal movement
Longitudinal movement component S1, the longitudinal movement component S2 of control mechanism II is connected；The microphone array longitudinal movement controls machine
Structure II include longitudinal movement component S1, longitudinal movement component S2, they pass through mechanical connection component and heteromorphic teeth wheel set I phase respectively
Even, the screw rod bushing I that longitudinal movement component S1 also passes through it is connected with the rack G3 of vertical moving parts S1, longitudinal movement component S2
Also it is connected by its screw rod bushing II with the rack G4 of vertical moving parts S2；The microphone array vertical motion controls machine
Structure IV includes vertical motion component S1, vertical motion component S2, and vertical motion component S1 passes through its screw rod bushing III and microphone array
The matrix T2 of the main installing arm S2 of microphone array of column transverse movement control mechanism V is connected, and vertical motion component S2 passes through its silk
Rod set IV is connected with the matrix T1 of the main installing arm S1 of microphone array of microphone array transverse movement control mechanism V；Described
Microphone array transverse movement control mechanism V includes the main installing arm S1 of microphone array, the main peace arm S2 of microphone array, a plurality of biography
Sound device array divides installing arm, multiple microphones composition, and microphone array point installing arm is separately mounted to the main installation of microphone array
On the main installing arm S2 of arm S1, microphone array, microphone is mounted in microphone array point installing arm；The microphone correction
Control mechanism VI includes microphone correction mechanism I and microphone correction mechanism II, microphone correction mechanism I and microphone correction machine
Structure II is fixed on vertical motion component S2, vertical motion component S1 respectively；The adjusting support I includes lead screw motor M1, base
In pedestal I, adjusting support II includes lead screw motor M2, pedestal II by seat I, lead screw motor M1, and lead screw motor M2 is mounted in pedestal
In II, adjusting support III includes lead screw motor M3, pedestal III, and lead screw motor M3 is mounted in pedestal III.
Longitudinal movement component S1 described in the further technical solution of the present invention includes rack G1, bearing S1, screw rod I, silk
Rod set I, bearing S2, gear pair II, third stepper motor D3, one of plate inner surface, which is equipped with, in longitudinal two plates of rack G1 slides
Slot II, another piece of plate inner surface are equipped with sliding slot I, and bearing S2 is fixed on one of in rack G1 transverse direction two boards, bearing S2
It is connected with the one end screw rod I, the lateral fixing bearing S1 on another block of plate of rack G1, bearing S1 is connected with the screw rod I other end, and silk
Bar I passes through bearing S1 and is connected with the one of gear of gear pair II, another gear and third stepper motor D3 in gear pair II
It is connected, screw rod bushing I covers on screw rod I, and the transverse bar of screw rod bushing I is respectively placed on sliding slot I, sliding slot II；The longitudinal movement
Component S2 includes rack G2, bearing S3, screw rod II, screw rod bushing II, bearing S4, gear pair III, the 4th stepper motor D4, rack
One of plate inner surface is equipped with sliding slot IV in longitudinal two plates of G2, another piece of plate inner surface is equipped with sliding slot III, and bearing S4 is fixed
In rack G2 transverse direction two boards on one of plate, bearing S4 is connected with the one end screw rod II, and rack G2 is laterally on another block of plate
Be fixed with bearing S3, bearing S3 is connected with the screw rod II other end, and screw rod II pass through bearing S3 and gear pair III one of them
Gear is connected, another gear is connected with the 4th stepper motor D4 in gear pair III, and screw rod bushing II covers on screw rod II, screw rod
The transverse bar of set II is respectively placed on sliding slot III, sliding slot IV；The vertical motion component S1 includes rack G3, bearing S5, silk
Bar III, screw rod bushing III, bearing S6, gear pair IV, the 5th stepper motor D5, one of plate in longitudinal two plates of rack G3
Inner surface is equipped with sliding slot VI, another piece of plate inner surface is equipped with sliding slot V, and bearing S6 is fixed in rack G3 transverse direction two boards wherein one
On block plate, bearing S6 is connected with the one end screw rod III, and laterally another block of plate is fixed with bearing S5, bearing S5 and screw rod III to rack G3
The other end is connected, and screw rod III passes through bearing S5 and is connected with the one of gear of gear pair IV, another tooth in gear pair IV
Wheel be connected with the 5th stepper motor D5, screw rod bushing III covers on screw rod III, the transverse bar of screw rod bushing III be respectively placed in sliding slot V,
On sliding slot VI；The vertical motion component S2 includes rack G4, bearing S7, screw rod IV, screw rod bushing IV, bearing S8, gear pair
V, one of plate inner surface is equipped with sliding slot VIII, another piece of inner surface in longitudinal two plates of the 6th stepper motor D6, rack G4
Equipped with sliding slot VII, bearing S8 is fixed in the lateral two boards of rack G4 on one of plate, the one end bearing S8 and screw rod IV phase
Even, rack G4 is laterally fixed with bearing S7 on another block of plate, and bearing S7 is connected with the screw rod IV other end, and screw rod IV is across axis
It holds S7 to be connected with the one of gear of gear pair V, another gear is connected with the 6th stepper motor D6 in gear pair V, screw rod bushing
IV covers on screw rod IV, and the transverse bar of screw rod bushing IV is respectively placed on sliding slot VII, sliding slot VIII.
The main installing arm S1 of microphone array described in the further technical solution of the present invention includes matrix T1, matrix T1's
One end is equipped with bearing S10, and the other end is equipped with bearing S9, be among matrix T1 it is hollow, rack I, the both ends point of rack I are housed
On other fixing bearing S10, bearing S9, matrix T1 is equipped with stepper motor D7 on one side, and stepper motor D7 is fixed on matrix T1, and the 7th
Gear W1 is housed, gear W1 is engaged by recess I with rack I, and matrix T1 another side is equipped with multiple open on stepper motor D7 axis
Port recess is additionally provided with calibration microphone I for installing microphone array point installing arm, the upper end matrix T1；The microphone array
Main installing arm S2 includes matrix T2, and one end of matrix T2 is equipped with bearing S12, and it is empty among matrix T2 that the other end, which is equipped with bearing S11,
The heart is equipped with rack II, and the both ends of rack II are distinguished on fixing bearing S12, bearing S11, and matrix T2 is equipped with the 8th step on one side
Into motor D8, the 8th stepper motor D8 is fixed on matrix T2, and gear W2 is housed on the 8th stepper motor D8 axis, and gear W2 passes through
Recess II is engaged with rack II, and matrix T2 another side is equipped with multiple open recess and is used to install microphone array point installing arm,
The upper end matrix T1 is additionally provided with calibration microphone II；The microphone array point installing arm 22) it include substrate, substrate back two sides
Equipped with rack gear, front is equipped with multiple microphones and is inserted into pedestal, and microphone Probe microphone is inserted on pedestal.
Microphone calibration control mechanism I described in the further technical solution of the present invention includes the 9th stepper motor D9, set
Cylinder I, microphone insert port I, miniature noise elimination cavity I, reciprocity acoustic transducer G1, spring I, connector L1, reciprocity acoustic transducer
G2, electromagnet P1, double sliding slot C1, electromagnetic coil U1, the 9th stepper motor D9 are fixed on the rack G4 of vertical motion component S2,
9th stepper motor D9 is connected by screw rod with the one end connector L1, and the connector L1 other end is connected with sleeve I, inside sleeve I
Equipped with a cylindrical half-via, double sliding slot C1 and electromagnet P1 are equipped in hole, the ear bar of electromagnet P1 is placed on double sliding slot C1, together
When electromagnet P1 be equipped with electromagnetic coil U1, the electromagnet P1 other end is cased with spring I and is connected with miniature noise elimination cavity I, miniature to disappear
One end is equipped with reciprocity acoustic transducer G1 inside operatic tunes I, and the other end is equipped with reciprocity acoustic transducer G2, in addition miniature noise elimination cavity I
Middle part is equipped with microphone insert port I；The microphone calibration control mechanism II includes the tenth stepper motor D10, sleeve II, transaudient
Device insert port II, miniature noise elimination cavity II, reciprocity acoustic transducer G3, spring II, connector L2, reciprocity acoustic transducer G4, electricity
Magnet P2, double sliding slot C2, electromagnetic coil U2, the tenth stepper motor D10 are fixed on the rack G3 of vertical motion component S1, and the tenth
Stepper motor D10 is connected by screw rod with the one end connector L2, and the connector L2 other end is connected with sleeve II, sets inside sleeve II
There is a cylindrical half-via, double sliding slot C2 and electromagnet P2 are equipped in hole, the ear bar of electromagnet P2 is placed on double sliding slot C2, together
When electromagnet P2 be equipped with electromagnetic coil U2, the electromagnet P2 other end be cased with spring II and with miniature noise elimination cavity II, miniature noise elimination cavity
One end is equipped with reciprocity acoustic transducer G3 inside II, and the other end is equipped with reciprocity acoustic transducer G4, in addition in miniature noise elimination cavity II
Portion is equipped with microphone insert port II.
Virtual ball setting reference position measurement column VI includes bracket described in the further technical solution of the present invention, branch
Frame is connected with vertical rod, and vertical rod upper end is equipped with laser emitter, and upper end is equipped with microphone socket.
Due to using the above structure, a kind of small-sized acoustical holography measurement of free found field of the present invention and inverting device have following beneficial
Effect:
1) device is simple, light and handy, and debugging is convenient.
A kind of small-sized acoustical holography measurement of free found field of the present invention and inverting device, structure is very simple, also very light and handy, overcomes
To live disadvantage heavy in device, after only need to simply installing, behind all test and Inversion Calculation be all in control system
(not being emphasis of the invention, be not described in detail herein) carries out automatically under control, does not need manual intervention, can greatly save
Manpower and material resources mitigate the labor intensity of people, especially stablize sound field in large size, multi-point sampler, the freely complicated of multiple inverting
In it is more obvious.
2) data test and calculating can be made more accurate, reliably.
A kind of small-sized acoustical holography measurement of free found field of the present invention and inverting device, since most of work is not required to manually do
In advance, reduce human error, so keeping the result of the data tested and inverting relatively reliable, accurately.
With reference to the accompanying drawings and examples to a kind of small-sized acoustical holography measurement of free found field of the present invention and inverting device into one
Walk explanation.
Detailed description of the invention
Fig. 1 is a kind of small-sized acoustical holography measurement of free found field of the present invention and inverting equipments overall structure schematic diagram；
Fig. 2 is that a kind of small-sized acoustical holography measurement of free found field of the present invention and inverting device whole device support structure structure locally show
It is intended to；
Fig. 3 is that a kind of small-sized acoustical holography measurement of free found field of the present invention and inverting device indulge vertical motion component and microphone
Aligning gear partial schematic diagram；
Fig. 4 is a kind of small-sized acoustical holography measurement of free found field of the present invention and the main installing arm S1 of inverting device microphone array
Structural schematic diagram；
Fig. 5 is a kind of small-sized acoustical holography measurement of free found field of the present invention and the main installing arm S2 of inverting device microphone array
Structural schematic diagram；
Fig. 6 is that a kind of small-sized acoustical holography measurement of free found field of the present invention and inverting device longitudinal movement component S1 bow to knot
Structure schematic diagram；
Fig. 7 is that a kind of small-sized acoustical holography measurement of free found field of the present invention and inverting device longitudinal movement component S1 are faced upward to knot
Structure schematic diagram；
Fig. 8 is that a kind of small-sized acoustical holography measurement of free found field of the present invention and inverting device longitudinal movement component S2 bow to knot
Structure schematic diagram；
Fig. 9 is that a kind of small-sized acoustical holography measurement of free found field of the present invention and inverting device longitudinal movement component S2 are faced upward to knot
Structure schematic diagram；
Figure 10 be a kind of small-sized acoustical holography measurement of free found field of the present invention and inverting device vertical motion component S1 bow to
Structural schematic diagram；
Figure 11 be a kind of small-sized acoustical holography measurement of free found field of the present invention and inverting device vertical motion component S1 face upward to
Structural schematic diagram；
Figure 12 be a kind of small-sized acoustical holography measurement of free found field of the present invention and inverting device vertical motion component S2 bow to
Structural schematic diagram；
Figure 13 be a kind of small-sized acoustical holography measurement of free found field of the present invention and inverting device vertical motion component S2 face upward to
Structural schematic diagram；
Figure 14 is that a kind of small-sized acoustical holography measurement of free found field of the present invention and inverting device adjust support I internal structure signal
Figure；
Figure 15 is that a kind of small-sized acoustical holography measurement of free found field of the present invention and inverting device adjust support II internal structure and show
It is intended to；
Figure 16 is that a kind of small-sized acoustical holography measurement of free found field of the present invention and inverting device adjust support III internal structure and show
It is intended to；
Figure 17 is that a kind of small-sized acoustical holography measurement of free found field of the present invention and inverting device microphone correction mechanism I structure are shown
It is intended to；
Figure 18 is a kind of small-sized acoustical holography measurement of free found field of the present invention and inverting device microphone correction mechanism I internal junction
Structure schematic diagram；
Figure 19 is a kind of small-sized acoustical holography measurement of free found field of the present invention and inverting device microphone correction mechanism II structure
Schematic diagram；
Figure 20 is inside a kind of small-sized acoustical holography measurement of free found field of the present invention and inverting device microphone correction mechanism II
Structural schematic diagram；
Figure 21 is a kind of small-sized acoustical holography measurement of free found field of the present invention and inverting device microphone microphone array point peace
Arm and microphone are dividing installing arm scheme of installation；
Figure 22 is that a kind of small-sized acoustical holography measurement of free found field of the present invention and inverting device virtual ball setting reference position are surveyed
Measure column VI；
Figure 23 is a kind of small-sized acoustical holography measurement of free found field of the present invention and the schematic diagram of inverting device electromagnet P1, P2
Figure 24 is the open recess on a kind of small-sized acoustical holography measurement of free found field of the present invention and inverting device matrix T1, T2
Side schematic view；
Figure 25 is the intelligence control system entirety of a kind of small-sized acoustical holography measurement of free found field of the control present invention and inverting device
Structural block diagram；
Figure 26 be the intelligence of a kind of small-sized acoustical holography measurement of free found field of the control present invention and inverting device inside the control system
Structural block diagram；
Figure 27 is the intelligence control system acoustic pressure of a kind of small-sized acoustical holography measurement of free found field of the control present invention and inverting device
Test and acoustics Inversion Calculation inside modules structural schematic diagram；
Figure 28 is the intelligence control system information of a kind of small-sized acoustical holography measurement of free found field of the control present invention and inverting device
Input display module internal structure block diagram.
Main element label declaration: 1 one adjust support I, 2 one adjust support II, 3 one adjust support III, 4 one base plates,
5 one fixed weight rotary tables, 6 one level sensor K1,7 one level sensor K2,8 one vertical support bars, 9 one electric appliances
Case, 10 1 liquid crystal micros show touch screen, 11 1 laser pickoffs, 12 1 longitudinal directions and rotary motion component mounting platform, 13 1
It is heteromorphic teeth wheel set I, the 14 one the first stepper motor D1,15 1 second stepper motor D2,16 1 longitudinal movement component S1,17 1 longitudinal
Moving parts S2,18 1 vertical motion component S1,19 1 vertical motion component S2, the main installing arm S1 of 20 1 microphone arrays, 21
The main installing arm S2 of one microphone array, 22 1 microphone arrays divide installing arm, 23 1 microphones, 24 1 mechanical connection components, 25
One microphone correction mechanism I, 26 1 microphone correction mechanism II, 27 1 calibration microphone S1,28 1 calibration microphone S2,29,
One bracket, 30 1 vertical rods, 31 1 laser emitters, 32 1 microphone sockets, 1,601 1 rack G1,1,602 1 bearing S1,
1603 1 gear pair II, 1,604 1 third stepper motor D3,1,605 1 screw rod I, 1,606 1 screw rod bushing I, 1,607 1 bearing S2,
1608 1 sliding slot I, 1,609 1 sliding slot II, 1,701 1 rack G2,1,702 1 bearing S3,1,703 1 gear pair III, 1,704 1 the 4th
Stepper motor D4,1,705 1 screw rod II, 1,706 1 screw rod bushing II, 1,707 1 bearing S4,1,708 1 sliding slot III, 1,709 1 sliding slots
IV, 1,801 1 rack G3,1,802 1 bearing S5,1,803 1 gear pair IV, 1,804 one the 5th stepper motor D5,1,805 1 screw rods
III, 1,806 1 screw rod bushing III, 1,807 1 bearing S6,1,808 1 sliding slot V, 1,809 1 sliding slot VI, 1,901 1 rack G4,1,902 1
Bearing S7,1,903 1 gear pair V, 1,904 one the 6th stepper motor D6,1,905 1 screw rod IV, 1,906 1 screw rod bushing IV, 1,907 1
Bearing S8,1,908 1 sliding slot VII, 1,909 1 sliding slot VIII, 101 1 adjust support I pedestals, the 102 one the first lead screw motor M1,
201 1 adjust support II pedestals, the 202 one the second lead screw motor M2,301 1 adjust support III pedestals, 302 1 third screw rods electricity
Machine M3,2,001 1 matrix T1,2,002 1 bearing S9,2,003 one the 7th stepper motor D7,2,004 1 gear W1,2,005 1 bearings
S10,2,006 1 recess I, 2,007 1 rack I, 2,101 1 matrix T2,2,102 1 bearing S11,2,103 one the 8th stepper motors
D8,2,104 1 gear W2,2,105 1 bearing S12,2,106 1 recess II, 2,107 1 rack II, 2,201 1 rack gears, 2202 points of peaces
Arm substrate, 2,203 1 microphones insertion pedestal, 2,501 one the 9th stepper motor D9,2,502 1 sleeve I, 2,503 1 microphones are filled to insert
Entrance I, 2,504 1 miniature noise elimination cavity I, 2,505 1 reciprocity acoustic transducer G1,2,506 1 spring I, 2507 a connection piece L1,
2508 1 reciprocity acoustic transducer G2,2,509 1 electromagnet P1,2510 a pair of sliding slot C1,2,511 1 electromagnetic coil B1,2,601 1
Tenth stepper motor 010,2,602 1 sleeve II, 2,603 1 microphone insert port II, 2,604 1 miniature noise elimination cavity II, 2,605 1 are mutually
Easy acoustic transducer G3,2,606 1 spring II, 2607 a connection piece L2,2,608 1 reciprocity acoustic transducer G4,2,609 1 electromagnetism
Iron P2,2610 a pair of sliding slot C2,2,611 1 electromagnetic coil B2
Specific embodiment
As shown in Fig. 1 to Figure 24, a kind of small-sized acoustical holography measurement of free found field of the present invention and inverting device, the device include
Whole device support adjustment mechanisms I, microphone array longitudinal movement control mechanism II, microphone array rotary motion control mechanism
III, microphone array vertical motion control mechanism IV, microphone array transverse movement control mechanism V, microphone correction control machine
Reference position positioning measurement column VII is arranged in structure VI, virtual ball；The whole device support adjustment mechanisms I includes adjusting support I
1, it adjusts support II 2, adjust support III 3, three adjusting supports are respectively by respective lead screw motor and base plate 4
Screw hole is connected, and base plate 4 is equipped with fixed weight rotary table 5, and fixed weight rotary table 5 is fixed on base plate 4, fixed weight circle
Platform 4 can increase the weight of pedestal, and to prevent entire mechanism from overturning, base plate 4 is additionally provided with level sensor K1, horizontal position
Sensor K2 is set, the two level sensors can detecte base plate 4 in the levelness of both direction, in conjunction with adjusting branch
The levelness of the adjustable base plate 4 of I, II, III is supportted, 5 upper surface of fixed weight rotary table is connected with vertical support bar 8, vertical branch
8 upper end of strut is connected with longitudinal direction and rotary motion component mounting platform 12, and 8 upper end of vertical support bar is additionally provided with laser pickoff
11, longitudinal direction and 12 side of rotary motion component mounting platform are equipped with electric appliance box 9 and liquid crystal micro display touch screen 10, electric appliance box 9
Related with the control system circuit board of middle installation, liquid crystal micro display touch screen 10 can complete the input of some preset data with
And measuring and calculation is as the result is shown；The microphone array rotary motion control mechanism III includes being located at longitudinal and rotation fortune
The first stepper motor D1, second stepper motor D2, the first stepper motor D1 below dynamic component mounting platform 12 by bearing with
The one of gear of heteromorphic teeth wheel set I 13 being located on longitudinal direction and rotary motion component mounting platform 12 is connected, the second stepping electricity
Machine D2 is connected by bearing with another gear of heteromorphic teeth wheel set I 13, and heteromorphic teeth wheel set I 13 is by being located at longitudinal and rotation
The mechanical connection component 24 of moving parts mounting platform 12 respectively with the longitudinal movement component S1 of longitudinal movement control mechanism II, vertical
It is connected to moving parts S2, by forward and reverse movement of the first stepper motor D1, second stepper motor D2, to drive heteromorphic teeth
The positive and negative rotation of wheel set I 13, by the transmitting of heteromorphic teeth wheel set I13, to drive longitudinal movement component S1, longitudinal movement component
The rotation of S2, and then drive the rotation of microphone array；The microphone array longitudinal movement control mechanism II includes longitudinal
Moving parts S1, longitudinal movement component S2, they pass through mechanical connection component 24 respectively and be connected with heteromorphic teeth wheel set I 13, it is longitudinal
The screw rod bushing I 1606 that moving parts S1 also passes through it is connected with the rack G3 of vertical moving parts S1, and longitudinal movement component S2 is also
It is connected by its screw rod bushing II 1706 with the rack G4 of vertical moving parts S2；The microphone array vertical motion control
Mechanism IV processed includes vertical motion component S1, vertical motion component S2, and vertical motion component S1 passes through its screw rod bushing III 1806
It is connected with the matrix T2 of the main installing arm S2 of microphone array of microphone array transverse movement control mechanism V, vertical motion component
S2 passes through the main installing arm S1's 20 of microphone array of its screw rod bushing IV 1906 and microphone array transverse movement control mechanism V
Matrix T1 2001 is connected；The microphone array transverse movement control mechanism V include the main installing arm S1 20 of microphone array,
The main peace arm S2 21 of microphone array, a plurality of microphone array divide installing arm 22, multiple microphones 23 to form, microphone array point
Installing arm 22 is separately mounted on the main installing arm S1 20 of microphone array, the main installing arm S2 21 of microphone array, microphone 23
It is mounted in microphone array point installing arm 22；The microphone correction control mechanism VI includes microphone correction mechanism I 25
Vertical motion is fixed respectively with microphone correction mechanism II 26, microphone correction mechanism I 25 and microphone correction mechanism II 26
On component S2 19, vertical motion component S1 18；The adjusting support I 1 includes the first lead screw motor M1 102, pedestal I
101, the first lead screw motor M1 102 are mounted in pedestal I 101, and adjusting support II 2 includes the second lead screw motor M2 202, pedestal
II 201, the second lead screw motor M2 202 are mounted in pedestal II 201, and adjusting support III 3 includes third lead screw motor M3
302, pedestal III 301, third lead screw motor M3 302 are mounted in pedestal III 301, by the first lead screw motor M1, second
Bar motor M2, the levelness of the adjustable base plate 4 of the positive counter-movement of third lead screw motor M3.
The longitudinal movement component S1 16 includes rack G1 1601, bearing S1 1602, screw rod I 1605, screw rod bushing I
1606, bearing S2 1607, gear pair II 1603, third stepper motor D3 1604, its in longitudinal two plates of rack G1 1601
In one piece of plate inner surface is equipped with sliding slot II 1609, another piece of plate inner surface is equipped with sliding slot I 1608, bearing S2 1607 is fixed on
In the lateral two boards of rack G1 1601 it is one of on, bearing S2 1607 is connected with 1605 one end screw rod I, rack G1 1601
Laterally fixing bearing S1 1602 on another block of plate, bearing S1 1602 is connected with 1605 other end of screw rod I, and screw rod I
1605 pass through bearing S1 1602 is connected with the one of gear of gear pair II 1603, another gear in gear pair II 1603
Be connected with third stepper motor D3 1604,1606 sets of screw rod bushing I on screw rod I 1605, the transverse bar of screw rod bushing I 1605 point
It is not placed on sliding slot I 1608, sliding slot II 1609, by the positive and negative rotation of third stepper motor D3 1604, then passes through gear pair II
1603 transmitting drives the rotation of screw rod I 1605 and then drives screw rod bushing I 1606 in sliding slot I 1608, sliding slot II 1609
Upper sliding so that it is longitudinal dynamic to drive vertical motion component S1 18 to make, then and drives the main installing arm S2's 21 of microphone array
Microphone array does longitudinal movement；The longitudinal movement component S2 17 includes rack G2 1701, bearing S3 1702, screw rod
II 1705, screw rod bushing II 1706, bearing S4 1707, gear pair III 1703, the 4th stepper motor D4 1704, rack G2
One of plate inner surface is equipped with sliding slot IV 1709 in 1701 longitudinal two plates, another piece of plate inner surface is equipped with sliding slot III
1708, bearing S4 1707 are fixed in the lateral two boards of rack G2 1701 on one of plate, bearing S4 1707 and screw rod II
1705 one end are connected, and are fixed with bearing S3 1702, bearing S3 1702 and screw rod II on the lateral another block of plate of rack G2 1701
1705 other ends are connected, and screw rod II 1705 passes through the one of gear phase of bearing S3 1702 and gear pair III 1703
Even, another gear is connected with the 4th stepper motor D4 1704 in gear pair III 1703, and 1706 sets of screw rod bushing II in screw rod
On II 1705, the transverse bar of screw rod bushing II 1705 is respectively placed on sliding slot III 1708, sliding slot IV 1709, passes through the 4th step
Into the positive and negative rotation of motor D4 1704, then pass through the transmitting of gear pair II 1703, drives the rotation of screw rod II 1705 and then band
Dynamic screw rod bushing II 1706 is slided in sliding slot III 1708, sliding slot IV 1709, so that it is longitudinal to drive vertical motion component S119 to make
It is dynamic, then and the microphone array on the main installing arm S1 20 of microphone array is driven to do longitudinal movement；The vertical motion group
Part S1 18 includes rack G3 1801, bearing S5 1802, screw rod III 1805, screw rod bushing III 1806, bearing S6 1807, tooth
Wheel set IV 1803, the 5th stepper motor D5 1804, one of plate inner surface is equipped in longitudinal two plates of rack G3 1801
Sliding slot VI 1809, another piece of plate inner surface are equipped with sliding slot V 1808, and bearing S6 1807 is fixed on laterally two pieces of rack G3 1801
In plate on one of plate, bearing S6 1807 is connected with 1805 one end screw rod III, and laterally another block of plate is solid by rack G3 1801
There are bearing S5 1802, bearing S5 1802 to be connected with 1805 other end of screw rod III, and screw rod III 1805 passes through bearing surely
S5 1802 is connected with the one of gear of gear pair IV 1803, another gear and the 5th stepping electricity in gear pair IV 1803
Machine D5 1804 be connected, 1806 sets of screw rod bushing III on screw rod III 1805, the transverse bar of screw rod bushing III 1805 is respectively placed in
On sliding slot V 1808, sliding slot VI 1809, the positive and negative rotation of the 5th stepper motor D5 1804, then pass through the biography of gear pair IV 1803
It passs, screw rod III 1805 is driven to rotate, and then drive screw rod bushing III 1806 sliding on sliding slot V 1808 and sliding slot VI 1809
It is dynamic, so that the microphone array on the main installing arm S2 21 of microphone array does longitudinal movement；The vertical motion component S2
19 include rack G4 1901, bearing S7 1902, screw rod IV 1905, screw rod bushing IV 1906, bearing S8 1907, gear pair V
1903, one of plate inner surface is equipped with sliding slot VIII in longitudinal two plates of the 6th stepper motor D6 1904, rack G4 1901
1909, another piece of inner surface is equipped with sliding slot VII 1908, and bearing S8 1907 is fixed in the lateral two boards of rack G4 1901
On one of plate, bearing S8 1907 is connected with 1905 one end screw rod IV, is fixed on the lateral another block of plate of rack G4 1901
Bearing S7 1902, bearing S7 1902 are connected with 1905 other end of screw rod IV, and screw rod IV 1905 passes through bearing S7 1902
It is connected with the one of gear of gear pair V 1903, another gear and the 6th stepper motor D6 1904 in gear pair V 1903
Be connected, 1906 sets of screw rod bushing IV on screw rod IV 1905, the transverse bar of screw rod bushing IV 1905 is respectively placed in sliding slot VII
1908, on sliding slot VIII 1909, the positive and negative rotation of the 6th stepper motor D6 1904, then pass through the transmitting of gear pair V 1903, band
Dynamic screw rod IV 1905 rotates, and then screw rod bushing IV 1906 is driven to slide on sliding slot VII 1908 and sliding slot VIII 1909, from
And the microphone array on the main installing arm S0 20 of microphone array does longitudinal movement；
The main installing arm S1 (20) of the microphone array includes matrix T1 2001, and one end of matrix T1 2001 is equipped with axis
Hold S10 2005, the other end is equipped with bearing S9 2002, be among matrix T1 2001 it is hollow, rack I 2007, gear are housed
On both ends difference fixing bearing S10 2005, the bearing S9 2002 of bar I 2007,2007 one side of matrix T1 is equipped with stepper motor
D7 2003, stepper motor D7 2003 are fixed on matrix T1 2001, and gear W1 is housed on 2003 axis of the 7th stepper motor D7
2004, gear W1 2004 are engaged by recess I 2006 with rack I 2007, and 2001 another side of matrix T1 is equipped with multiple open
For port recess for installing microphone array point installing arm 22,2001 upper end matrix T1 is additionally provided with calibration microphone I 27, by the
The positive and negative rotation of seven stepper motor D7 2003 drives rack I 2007 to rotate by the transmitting of gear W1 2004, and then drives
Microphone array point installing arm 22 makees transverse movement；The main installing arm S2 21 of the microphone array includes matrix T2 2101,
One end of matrix T2 2101 is equipped with bearing S12 2105, and it is empty among matrix T2 2101 that the other end, which is equipped with bearing S11 2102,
The heart is equipped with rack II 2107, and the both ends of rack II 2107 are distinguished on fixing bearing S12 2105, bearing S11 2102,
2101 one side of matrix T2 is equipped with the 8th stepper motor D8 2103, and the 8th stepper motor D8 2103 is fixed on matrix T2 2101
On, gear W2 2104 is housed, gear W2 2104 passes through recess II 2106 and rack on 2103 axis of the 8th stepper motor D8
II 2107 is engaged, and 2101 another side of matrix T2 is equipped with multiple open recess for installing microphone array point installing arm 22, base
2101 upper end body T1 is additionally provided with calibration microphone II 28 and passes through gear W2 by the positive and negative rotation of the 8th stepper motor D8 2103
2104 transmitting drives rack II 2107 to rotate, and then microphone array point installing arm 22 is driven to make transverse movement；It is described
Microphone array divide installing arm 22 include substrate 2202,2202 back side two sides of substrate be equipped with rack gear 2201, front be equipped with it is multiple
Microphone is inserted into pedestal 2203, and 23 Probe microphone of microphone is inserted on pedestal 2203.
The microphone calibration control mechanism I 25 includes the 9th stepper motor D9 2501, sleeve I 2502, microphone
Insert port I 2503, miniature noise elimination cavity I 2504, reciprocity acoustic transducer G1 2505, spring I 2506, connector L1 2507,
Reciprocity acoustic transducer G2 2508, electromagnet P1 2509, double sliding slot C1 2510, electromagnetic coil U1 2511, the 9th stepping electricity
Machine D9 2501 is fixed on the rack G4 1901 of vertical motion component S2 19, the 9th stepper motor D9 2501 by screw rod with
2507 one end connector L1 is connected, and 2507 other end of connector L1 is connected with sleeve I 2502, is equipped with inside sleeve I 2502
One cylindrical half-via is equipped with double sliding slot C1 2510 in hole and electromagnet P1 2509, the ear bar of electromagnet P1 2509 is placed on
On double sliding slot C1 2510, while electromagnet P1 2509 is equipped with electromagnetic coil U1 2511, another end cap of electromagnet P1 2509
There is spring I 2506 and be connected with miniature noise elimination cavity I 2504, miniature 2504 inside one end noise elimination cavity I is equipped with reciprocity acoustic transducer
Device G1 2505, the other end are equipped with reciprocity acoustic transducer G2 2508, and microphone is in addition equipped in the middle part of miniature noise elimination cavity I 2504
Insert port I 2503 transmits by the 9th stepper motor D9 2501, then by connector L1 2507, can make microphone calibration
Control mechanism I 25 can rotate in the forward direction 90 degree or reversely rotate 90 degree, by electromagnetic coil U1 2511 by with power-off, can be with
It slides electromagnet P1 2509 in double sliding slot C1 2510, and then stretches and contract with actuating miniature noise elimination cavity I 2504, and can make
The microphone insert port I 2503 of miniature noise elimination cavity I 2504 puts on microphone 23 or leaves microphone 23；The microphone calibration
Control mechanism II 26 includes the tenth stepper motor D10 2601, sleeve II 2602, microphone insert port II 2603, miniature disappears
Operatic tunes II 2604, reciprocity acoustic transducer G3 2605, spring II 2606, connector L2 2607, reciprocity acoustic transducer G4
2608, electromagnet P2 2609, double sliding slot C2 2610, electromagnetic coil U2 2611, the tenth stepper motor D10 2601 is fixed on perpendicular
To on the rack G3 1801 of moving parts S1 18, the tenth stepper motor D10 2601 passes through screw rod and connector L2 2,607 1
End is connected, and 2607 other end of connector L2 is connected with sleeve II 2602, and it is logical that cylinder half is equipped with inside sleeve II 2602
Hole, double sliding slot C2 2610 and electromagnet P2 2609 are equipped in hole, and the ear bar of electromagnet P2 2609 is placed on double sliding slot C2 2610
On, while electromagnet P2 2609 is equipped with electromagnetic coil U2 2611,2609 other end of electromagnet P2 is cased with spring II 2606 simultaneously
With miniature noise elimination cavity II 2604, miniature 2604 inside one end noise elimination cavity II is equipped with reciprocity acoustic transducer G3 2605, the other end
Equipped with reciprocity acoustic transducer G4 2608, it is in addition equipped with microphone insert port II 2603 in the middle part of miniature noise elimination cavity II 2604, leads to
The tenth stepper motor D10 2601 is crossed, then is transmitted by connector L2 2607, microphone calibration control mechanism II 26 can be made
Can rotate in the forward direction 90 degree or reversely rotate 90 degree, by electromagnetic coil U2 2611 by with power-off, electromagnet P2 can be made
2609 slide in double sliding slot C2 2610, and then stretch and contract with actuating miniature noise elimination cavity II 2604, and can make miniature noise elimination cavity
The microphone insert port II 2603 of II 2604 puts on microphone 23 or leaves microphone 23, microphone calibration control mechanism II
26 primarily as the spare of microphone calibration control mechanism I 25, recurs after microphone calibration control mechanism I 2 is broken
Effect；
The virtual ball setting reference position measurement column VI includes bracket 29, and bracket 29 is connected with vertical rod 30, vertical
30 upper end of bar is equipped with laser emitter 31, and upper end is equipped with microphone socket 32, which mainly determines empty when acoustics inverting
Reference position is arranged in quasi- ball.
A kind of small-sized acoustical holography measurement of free found field of the present invention and inverting device intelligence control system (are not weights of the invention
Point only briefly explains here) include control centre's module 70 and the accessory module 71 being connected respectively with control centre module and
Host computer interface module 72, information input display module 73, range finder module 74, acoustic pressure test and acoustics Inversion Calculation module 75,
Whole device horizontal adjustment drive module 76, microphone array vertical motion drive module 77, microphone array rotary motion are driven
Dynamic model block 78, microphone array transverse movement drive module 79, microphone array longitudinal movement drive module 80, microphone array
Correction of movement drive module 81, sensor signal input module 82；Its control process are as follows: be first shown in system electrification, first into
Row control centre module 70 initializes, and then sentences whether initialization succeeds, such as unsuccessful, then judges whether time-out, if not overtime,
Then continue to judge whether initialization succeeds, the display system mistake if time-out, if initialized successfully, control centre's module 70
Initialization command is issued to each sub-module and issues response confirmation signal, then judges whether to receive whole answer signals, not have such as
Have and all receive, then judge initialization whether time-out, such as time-out, then display system mistake then continues to determine whether if not overtime
Whole answer signals are received, are such as received, then it is ready to carry out entering system, organizes out " please input ginseng lower parameter " K, N1, N2, N3, w
[x], H1(x1, y1, z1), H2(x2, y2, z2), H (x3, y3, z3), h1, wherein x is 1 to N2, selected subsequently into holographic facet shape
Split flow, holographic facet shape selection split flow enter whole device horizontal location split flow after terminating, whole device level is fixed
After position split flow terminates, into nominal data TCH test channel multi-frequency amplitude and phase and calibration microphone multi-frequency amplitude spirit
Sensitivity and phase test calculate split flow, nominal data TCH test channel multi-frequency amplitude and phase and calibration microphone multi-frequency width
Value sensitivity and phase test calculate after split flow terminates, into common testing data TCH test channel amplitude and phase and transaudient
The multi-frequency amplitude sensitivity of device array and phase calculation test split flow, common testing data TCH test channel amplitude and phase and biography
Sound device array multi-frequency amplitude sensitivity and phase calculation test split flow enter acoustic pressure measuring and calculation split flow, sound after terminating
Enter acoustics Inversion Calculation split flow after pressing measuring and calculation split flow, acoustics Inversion Calculation split flow judges to survey after terminating
Examination inverting task finishes, and if not being that the system that is returned to is ready, terminates if it is with regard to task, the parameter K in the process is complete
Breath face shape selection parameter, N1It is also TCH test channel number to be measured, N for microphone number to be measured2For the frequency number to be corrected,
N3To do the periodicity that FFT operation is acquired, w [x] is the frequency values that need to be corrected, H1(x1, y1, z1) where virtual spherical surface
Reference position coordinate, H2(x2, y2, z2) be holographic facet position coordinates H3(x3, y3, z3) be reconstruction face position coordinates, h1For branch
Support the initial predetermined altitude of seat I.
The holographic facet shape selects split flow figure such as Fig. 6, selection parameter K incoming first, then judges whether K waits 1,
It is in this way then select holographic facet shape 1, if not being to be judged as whether K is equal to 2, holographic facet shape 2 is then selected in this way, as sentenced without being
Whether disconnected K is equal to 3, then selects holographic facet shape 3 in this way, if not being to be judged as whether K is equal to 4, then selects holographic facet shape in this way
Shape 4, as terminated without being, the parameter K in the process is holographic facet shape selection parameter.
The whole device horizontal location split flow control process are as follows: parameter h incoming first1, driving the first screw rod electricity
Machine N1 movement makes the height of support base I be equal to given setting value h1, then the value of detection level position sensor K2 judges
Whether the value is greater than 0, if being not more than 0, drives third screw rod N3 forward motion, raises support base III, return again to detection
The value of level sensor K2 drives third screw rod N3 counter motion if it is greater than 0, returns again to detection level position sensing
The value of device K2, if being equal to 0, then the value of detection level position sensor K1 judges whether the value is greater than 0, if less
In 0, then drives the second screw rod N2 motor to rotate forward, then return again to the value of detection level position sensor K1, make support base
II is raised, and if it is greater than 0, is then driven the second screw rod N2 motor to rotate backward, is then returned again to detection level position sensor K1
Value, if be equal to 0, terminate, h in the process1For the initial predetermined altitude of support base I.
The nominal data TCH test channel multi-frequency amplitude and phase and calibration microphone multi-frequency amplitude sensitivity with
Phase test calculates split flow figure control process；Parameter N incoming first2, N3, w [x], wherein the range of x is 1 to N2, then
Give cyclic variable L1, L2Initialization is 1, i.e. L1=1, L2=1, then to frequency variable w and cyclic variable assignment, that is, w=w
[L2], L2=L2+ 1, then split flow, the process are calculated into determining nominal data TCH test channel single-frequency amplitude and phase test
The single step rate amplitude sensitivity and phase test for entering calibration microphone after terminating calculate split flow, protect after the process
Deposit the output data of two processes, it may be assumed that
B1[L1][L2]=Aj, β1[L1][L2]=θj, B2[L1][L2]=A04, β2[L1][L2]=θ04, B3[L1][L2]=
An1, β3[L1][L2]=θn1B4[l1][L2]=A01, β4[L1][L2]=θ01, after data save, judge L2Whether N is greater than2,
If it is not greater, then returning to frequency variable w and cyclic variable assignment, that is, w=w [L2], L2=L2+ 1, if it is greater, then L2=L2
+ 1, then judge L1Whether 1 is more than or equal to, if it is not greater, then L1=L1+ 1, and return to frequency variable w and cyclic variable
Assignment, that is, w=w [L2], L2=L2+ 1, if it is larger than or equal to 1, then output data B1[L1][L2], β1[L1][L2], B2[L1][L2],
β2[L1][L2], B1[L1][L2], β3[L1][L2], B4[L1][L2], β4[L1][L2], wherein L1For 1-1, L2N is arrived for 12, then tie
Beam task, N in the process2For the frequency number to be corrected, N3To do the periodicity that FFT operation is acquired, w [x] is to need to correct
Frequency values.
The common testing data TCH test channel and the sensitivity of microphone array multi-frequency amplitude and phase calculation are tested
Split flow control process are as follows: incoming parameter: N1, N2, N3, w [x], B1[L1][L2], β1[L1][L2], B2[L1][L2], β2[L1]
[L2], wherein the range of x is 1 to N2, L1It is 1 to 1, L2N is arrived for 12, then set cyclic variable and assign initial value m1=1, m2=1, then
To frequency variable assignment w=w [m2], subsequently into single testing data TCH test channel single-frequency amplitude and phase test signal
Load step process, the process knot add into single microphone single-frequency amplitude sensitivity to be measured with phase test signal later
Steps flow chart is carried, the amplitude sensitivity and phase of the amplitude and phase and microphone of TCH test channel are obtained after the process,
That is: ,
And to variable m2It carries out plus 1 is assigned to m again2, m is then judged again2Whether N is greater than2, return if being not more than to frequency variable
Assignment w=w [m2], if it is greater, then m1=m1+ 1, m is then judged again1Whether N is greater than1, if it is not greater, then returning to frequency
Rate variable assignments w=w [m2], if it is greater than then exporting C1[m1][m2], δ1[m1][m2], C2[m1][m2], δ2[m1][m2], wherein
C1[m1][m2], δ1[m1][m2] it is respectively m1Road testing data TCH test channel is w [m in frequency2] amplitude and phase, C2[m1]
[m2], δ2[m1][m2] it is m1Road microphone to be measured is w [m in frequency2] amplitude and phase, m1 be 1 arrive N1, m2N is arrived for 12。
The acoustic pressure measuring and calculation split flow figure control process are as follows: incoming parameter N1, N2, N3W [x], C1[m1][m2], δ1
[m1][m2], C2[m1][m2], δ2[m1][m2], wherein m1 is 1 to N1, m2N is arrived for 12, x is 1 to N2；Then the load of signal with
It calculates, i.e., the lock-out pulse dispensing sub-unit inside main control unit 7501 provides lock-out pulse, and internal DDS unit is same in pulse
Under step, N1A data TCH test channel acquires N simultaneously respectively3Cycle data, N1Group data through one in main control unit 7501, two dimension
Mixing FFT calculates the calculating of sub-unit and spectrum energy gravity model appoach correction sub-unit and correction show that frequency is the signal width of w [x]
Value R [m1][m2] and phase ψ [m1][m2], finally find out holographic facet N1Holographic facet on a point answers acoustic pressure i.e.:
P[m1][m2]=R [m1][m2]/(C1[m1][m2] * C2[m1][m2]),Wherein m1 is 1 to N1, m2N is arrived for 12, last output data P
[m1][m2],Then terminate, P [m1][m2],For m on holographic facet1Road microphone is w in frequency
[m2] amplitude and phase, m1N is arrived for 11, m2N is arrived for 12。
The acoustics Inversion Calculation split flow figure control process are as follows: reference center coordinate H where incoming virtual spherical surface1
(x1, y1, z1), the centre coordinate H in holographic measurement face2(x2, y2, z2), rebuild face centre coordinate H3(x3, y3, z3), virtual ball
Number N4And acoustic pressure data P [m is answered in the face holographic facet H1][m2],Wherein m1 is 1 to N1, m2N is arrived for 12, holographic facet
Multiple acoustic pressure data P is assigned to pE(H), then according to equivalent source strength theoretical formulaTo unknown source
Strong density function σ (rQ) two-way Fourier series expansion is carried out, while using Two-dimensional FFT and trapezoid formula to Green's function K
(r, rQ) discretization is carried out, establish the relationship matrix T between acoustical holography measurement face and the equivalent source strength sound pressure level of virtual ballH, thus pE
(H)=[TH] Q, pEIt (H) is holographic facet measured value, Q is the unknown source strength density function σ (r of virtual ballQ) after two-way Fourier decomposition
Coefficient, finally using and establish THSame method is established to H on inverting face+Transfer matrix between sound pressure level and quasi- ballIn conjunction with pE(H)=[TH] Q withIt finds outAnd THInto
Row Regularization obtains:Various middle S ' is a certain virtual source strength in vibrating body above
It is distributed surface, σ (rQ) it is virtual source strength density function to be asked, K (r, rQ) it is integral kernel function, i.e. Green's function K (r, rQ)=
G (r, rQ1/4 π R of)=() eikR, rQThe virtual radius of a ball, r are virtual source strength to measuring surface or the distance in reconstruction face.
The nominal data TCH test channel single-frequency amplitude and phase test calculates step split flow control process are as follows:
Incoming frequency w and collection period number N3, calculating step is；
(a) the lock-out pulse Distribution Unit inside main control unit 7501 provides lock-out pulse, and internal DDS unit is in pulse
It synchronizes down and provides a sine wave signal sr=Are-jw, wherein ArFor signal srAmplitude, w be signal srFrequency, the signal warp
It crosses high speed multiple branch circuit electronic selection switch M1 7502 to be added on signal driving channel I 7504, the signal is using high speed more
Road electronic selection switch M2 (7505) is applied directly on nominal data TCH test channel 7512, and signal becomes:
That is A01=ArAq1Aj θ01=θq1+θj
It is rightSynchronized sampling N3A number of cycles signal, the signal through one in main control unit 7501, two dimension mixing FFT calculate sub-unit
And the calculating and correction of spectrum energy gravity model appoach correction sub-unit show that frequency is the signal of wAmplitude A01And phase theta01, on
The various middle B in faceq1(jw) frequency response function of signal driving channel I 7504, Aq1For Bq1(jw) amplitude, θq1For Bq1(jw)
Phase delay angle, BjIt (jw) is the frequency response function of nominal data TCH test channel 7512, AjFor Bj(jw) amplitude, θjFor Bj
(jw) phase delay angle.
(b) the lock-out pulse dispensing sub-unit inside main control unit 7501 provides lock-out pulse, and internal DDS sub-unit exists
A sine wave signal s is provided under impulsive synchronizationr=Are-jw, wherein ArFor signal srAmplitude, w be signal srFrequency, the letter
Number by high speed multiple branch circuit electronic selection switch M1 7502 be added to signal driving channel II 7503 on, the signal using high speed
Multiple branch circuit electronic selection switch M2 7505 is applied directly on nominal data TCH test channel 7512, and signal becomes:That is: A02=ArAq2Aj, θ02=θq2+θj, rightTogether
Step sampling N3A number of cycles signal, the signal through one in main control unit 7501, two dimension mixing FFT calculate sub-unit and frequency spectrum
The calculating and correction of power enhanced correction sub-unit show that frequency is w signalAmplitude A02And phase theta02, above it is various in
Bq2(jw) frequency response function of signal driving channel II 7503 is Aq2For Bq2(jw) amplitude, θq2For Bq2(jw) phase
Delay angle, BjIt (jw) is the frequency response function of nominal data TCH test channel 7512, AjFor Bj(jw) amplitude, θjFor Bj(jw) phase
Position delay angle.
(c) the lock-out pulse dispensing sub-unit inside main control unit 7501 provides lock-out pulse, and internal DDS sub-unit exists
A sine wave signal s is provided under impulsive synchronizationr=Are-jw, wherein ArFor signal srAmplitude, w be signal srFrequency, the letter
Number by high speed multiple branch circuit electronic selection switch M1 7502 be added to signal driving channel I 7504 on, the signal using high speed
Multiple branch circuit electronic selection switch M2 7505 is added on signal driving channel II 7503, is opened using high speed multiple branch circuit electronic selection
It closes M2 7505 to be added on nominal data TCH test channel 7512, signal becomes:
That is: A03=ArAq1Aq2Aj, θ03=θq1+θq2+θj, rightSynchronized sampling N3A number of cycles signal, the signal is through master
One in control unit 7501, two dimension mixing FFT calculates sub-unit and spectrum energy gravity model appoach corrects the calculating and correction of sub-unit
Show that frequency is w signalAmplitude A03And phase theta03, above formula Bq1(jw) frequency response function of signal driving channel I 7504,
Aq1For Bq1(jw) amplitude, θq1For Bq1(jw) phase delay angle, Bj(jw) it is rung for the frequency of nominal data TCH test channel 7512
Answer function, AjFor Bj(jw) amplitude, θjFor Bj(jw) phase delay angle, Bq2(jw) frequency of signal driving channel II 7503 is rung
Answering function is Aq2For Bq2(jw) amplitude, θq2For Bq2(jw) phase delay angle.
(d) by A01, A02, A03, ArFind out Aq1, Aq2, Aj, by θ01, θ02, θ03Find out θq1, θq2, θjThat is:
Aq1=A03/A02, Aq2=A03/A01, Aj=(A01A02)/(ArA03),
θq1=θ03-θ02, θq2=θ03-θ01, θj=θ01+θ02-θ03,
Finally export A01, A02, A03, A04, θ01, θ02, θ03, θj, N3.
The single-frequency amplitude sensitivity of the calibration microphone and phase test calculate step split flow control process
Are as follows:, incoming first parameter w, A01, A02, A03, θ01, θ02, θ03, N3, calculate step are as follows:
(g1) microphone correction mechanism I 25 transports motion control mechanism IV, microphone array transverse direction in microphone array vertical
Under motion control mechanism V cooperation, so that the microphone insert port I 2503 of microphone correction mechanism I 25 is inserted into calibration and passes on device 27,
The lock-out pulse Distribution Unit inside main control unit 7501 provides lock-out pulse simultaneously, and internal DDS sub-unit is in impulsive synchronization
Under provide a sine wave signal sr=Are-jw, wherein ArFor signal srAmplitude, w be signal srFrequency, the signal is through excessively high
Fast multiple branch circuit electronic selection switch M1 7502 is added to signal driving channel I 7504, opens using high speed multiple branch circuit electronic selection
M2 7505 is closed, is added on reciprocity acoustic transducer G1 2505, pushes 2505 sounding of reciprocity acoustic transducer G1, radiative acoustic wave should
Sound wave is received with reciprocity acoustic transducer G1 2502 at a distance of for the calibration microphone 27 of r/2, and the signal is by high speed multiple branch circuit electricity
Son selection switch M3 7509 is added to nominal data TCH test channel 7512, and signal becomes:
To obtain the final product: A04=ArAq1Ar1An1Aj, θ04=θq1+θtr1+θn1+θj, rightSynchronized sampling N3A number of cycles signal, should
Signal through one in main control unit 7501, two dimension mixing FFF calculate sub-unit and spectrum energy gravity model appoach correction sub-unit meter
It calculates and show that frequency is the signal of w with correctionAmplitude A04And phase theta04, above formula Bq1(jw) frequency of signal driving channel I 7504
Receptance function, Aq1For Bq1(jw) amplitude, θq1For Bq1(jw) phase delay angle, BjIt (jw) is nominal data TCH test channel
7512 frequency response function, AjFor Bj(jw) amplitude, θjFor Bj(jw) phase delay angle, Bq2(jw) signal drives channel II
7503 frequency response function is Aq2For Bq2(jw) amplitude, θq2For Bq2(jw) phase delay angle, Btr1It (jw) is reciprocity sound
Learn 2505 tranmitting frequency receptance function of transducing G1, Atr1For Btr1(jw) amplitude, θtr1For Btr1(jw) phase delay angle, Bn1(w)
Frequency response function, A are received for calibration microphone (27)n1For Bn1(w) amplitude, θn1For for Bn1(w) phase delay angle.
(g2) microphone correction mechanism I 25 transports motion control mechanism IV, microphone array transverse direction in microphone array vertical
Under motion control mechanism V cooperation, so that the microphone insert port I 2503 of microphone correction mechanism I 25 is inserted into calibration and passes on device 27,
The lock-out pulse Distribution Unit inside main control unit 7501 provides lock-out pulse simultaneously, and internal DDS sub-unit is in impulsive synchronization
Under provide a sine wave signal sr=Are-jw, wherein ArFor signal srAmplitude, w be signal srFrequency, the signal through high speed
Multiple branch circuit electronic selection switch M1 7502, is added to signal driving channel II 7503, which passes through high speed multiple branch circuit electronic cutting
M2 7505 is closed, is added on reciprocity acoustic transducer G2 2508, pushes 2508 sounding of reciprocity acoustic transducer G2, radiative acoustic wave should
Sound wave is received with reciprocity acoustic transducer G2 2508 at a distance of for the calibration microphone 27 of r/2, and the signal is by high speed multiple branch circuit electricity
Son selection switch M37509 is added to nominal data TCH test channel 7512, and signal becomes:
To obtain the final product: A05=ArAq2Atr2An1Aj, θ05=θq2+θtr2+θn1+θj, rightSynchronized sampling N3A number of cycles signal, should
Signal through one in main control unit 7501, two dimension mixing FFT calculate sub-unit and spectrum energy gravity model appoach correction sub-unit meter
It calculates and show that frequency is the signal of w with correctionAmplitude A05And phase theta05, above formula Bq2(jw) signal drives channel II's 7503
Frequency response function, Aq2For Bq2(jw) amplitude, θq2For Bq2(jw) phase delay angle, Bj(jw) logical for nominal data test
The frequency response function in road 7512, AjFor Bj(jw) amplitude, θjFor Bj(jw) phase delay angle, Btr2(jw) it is changed for reciprocity acoustics
Energy 2508 tranmitting frequency receptance function of G2, Atr2For Btr2(jw) amplitude, θtr2For Btr2(jw) phase delay angle, Bn1It (w) is mark
Determine microphone 27 and receives frequency response function, An1For Bn1(w) amplitude, θn1For for Bn1(w) phase delay angle.
(g3) the lock-out pulse dispensing sub-unit inside main control unit 7501 provides lock-out pulse, internal DDS sub-unit
A sine wave signal s is provided under impulsive synchronizationr=Are-jw, wherein ArFor signal srAmplitude, w be signal srFrequency, should
Signal passes through high speed multiple branch circuit electronic selection switch M1 7502, is added to signal driving channel I 7504, and the signal is more by high speed
It is added on branch electronic selection switch M2 7505 on reciprocity acoustic transducer G1 2505, pushes reciprocity acoustic transducer G1 2505
Sounding, radiative acoustic wave, the sound wave are connect with reciprocity acoustic transducer G1 2505 at a distance of for the reciprocity acoustic transducer G2 2508 of r
It receives, which is added to data test channel by high speed multiple branch circuit electronic selection switch M3 7509, and signal becomes:
To obtain the final product: A06=ArAq1Atr1Atr2[2r/(ρf)]Aj, θ06=θq1+θtr1+θtr2-kr+π/2+θj, rightSynchronized sampling
N3A number of cycles signal, the signal through one in main control unit 7501, two dimension mixing FFT calculate sub-unit and spectrum energy weight
The calculating and correction of heart method correction sub-unit show that frequency is the signal of wAmplitude A06And phase theta06, above formula Bq1(jw) signal drives
The frequency response function of dynamic channel I 7504, Aq1For Bq1(jw) amplitude, θq1For Bq1(jw) phase delay angle, Bj(jw) it is
The frequency response function of nominal data TCH test channel 7512, AjFor Bj(jw) amplitude, θjFor Bj(jw) phase delay angle, Btr1
It (jw) is 2505 tranmitting frequency receptance function of reciprocity acoustic transducer G1, Atr1For Btr1(jw) amplitude, θtr1For Btr1(jw) phase
Delay angle, Btr2It (jw) is reciprocity acoustic transducer G2 (2508) tranmitting frequency receptance function, Atr2For Btr2(jw) amplitude, θtr2For
Btr2(jw) phase delay angle, B 'tr2(jw) frequency response function, ρ are received for reciprocity acoustic transducer G2 (2508)0It is close for air
Degree, f are the frequency of sound wave, 2r/ ρ0F is the reciprocity parameter of spherical surface free found field, and for other free found fields, this parameter will be fitted
Work as amendment, can equally be applicable in other kinds of free found field come as measuring sound source.
(g4) by A01, A02, A03, A04, A05, A06, ArFind out Atr1, Atr2, An1:
By θ01, θ02, θ03, θ04, θ05, θ06Find out θtr1, θtr2, θn1: θn1=(θ01+θ04+θ05-θ03-θ06-θj+ k- pi/2)/2, obtained An1、θn1Just
It is amplitude sensitivity and the phase correction coefficient of microphone to be measured, exports An1, θn1A04, θ04。
The single testing data TCH test channel single-frequency amplitude and phase test signal loading steps flow chart controls
Process are as follows: incoming parameter N3, then carry out the load calculating of signal, it may be assumed that the lock-out pulse dispensing inside main control unit 7501
Sub-unit provides lock-out pulse, and internal DDS unit provides a sine wave signal s under impulsive synchronizationr=Are-jw, wherein ArFor
Signal srAmplitude, w be signal srFrequency, which is added to signal by high speed multiple branch circuit electronic selection switch M1 (7502)
It drives on channel I 7504, which is applied directly to m using high speed multiple branch circuit electronic selection switch M2 75051Circuit-switched data
On TCH test channel 7511, signal becomes:
That is: It is rightSynchronized sampling N3A number of cycles signal, the signal through one in main control unit 7501, two dimension mix
FFT calculates the calculating of sub-unit and spectrum energy gravity model appoach correction sub-unit and correction show that frequency is the signal of wAmplitudeAnd phaseLast output amplitudeAnd phase
The single microphone single-frequency amplitude sensitivity to be measured and phase test examination load step Row control
Process are as follows: incoming parameter N3, then carry out the load calculating of signal, it may be assumed that microphone correction mechanism I 25 is in microphone array heavily fortified point
To under fortune motion control mechanism IV, microphone array transverse movement control mechanism V cooperation, make the biography of microphone correction mechanism I 25
Sound device insert port I 2503 is inserted into m1Road microphone, while the lock-out pulse Distribution Unit inside main control unit 7501 provides
Lock-out pulse, internal DDS unit provide a sine wave signal s under impulsive synchronizationr=Are-jw, wherein ArFor signal srWidth
Value, w are signal srFrequency, the signal by high speed multiple branch circuit electronic selection switch M1 7502 be added to signal driving channel I
7504, it using on high speed multiple branch circuit electronic selection switch M2 7505, is added on reciprocity acoustic transducer G1 2505, pushes mutual
Easy 2505 sounding of acoustic transducer G1, radiative acoustic wave, the sound wave by with reciprocity acoustic transducer G1 2505 at a distance of for r/2
m1Road microphone receives, which is added to m by high speed multiple branch circuit electronic selection switch M3 75091Circuit-switched data TCH test channel
On 7511, signal becomes:
To obtain the final product:
To s synchronized sampling N3A number of cycles signal, the signal through one in main control unit 7501, two dimension mixing FFT count
It calculates and spectrum energy gravity model appoach corrects the calculating of unit and correction show that frequency is the signal of wAmplitudeAnd phase
Output amplitudeAnd phase
The power enhanced spectrum correction method isΔ w to frequency correction,Amplitude is corrected, whereinM generally takes 1 or 2, XkFor Fast Fourier Transform (FFT) intermediate frequency
The complex value spectrum of k location, K in spectrogramtFor the extensive coefficient of energy, KtTake it is generally related with the selection of window function, when with Hanning window
Generally take 8/3.
Claims (5)
1. a kind of small-sized acoustical holography measurement of free found field and inverting device, it is characterised in that the device includes that whole device support is adjusted
Complete machine structure I, microphone array longitudinal movement control mechanism II, microphone array rotary motion control mechanism III, microphone array
Vertical motion control mechanism IV, microphone array transverse movement control mechanism V, microphone correction control mechanism VI, virtual ball are set
Set reference position positioning measurement column VII；The whole device support adjustment mechanisms I includes adjusting support I (1), adjusting support
II (2), support III (3) is adjusted, three adjusting supports pass through respective lead screw motor and the screw hole phase on base plate (4) respectively
Even, base plate (4) is equipped with fixed weight rotary table (5), and fixed weight rotary table (5) is fixed on base plate (4), base plate (4)
On be additionally provided with level sensor K1 (6), level sensor K2 (7), fixed weight rotary table (5) upper surface and vertical branch
Strut (8) is connected, and vertical support bar (8) upper end is connected with longitudinal direction and rotary motion component mounting platform (12), vertical support bar
(8) upper end is additionally provided with laser pickoff (11), longitudinal direction and rotary motion component mounting platform (12) side be equipped with electric appliance box (9) with
Liquid crystal micro shows touch screen (10)；The microphone array rotary motion control mechanism III includes being located at longitudinal and rotation
The first stepper motor D1 (14), the second stepper motor D2 (15) of moving parts mounting platform (12) below, the first stepper motor
D1 (14) by bearing and the heteromorphic teeth wheel set I (13) that is located on longitudinal direction and rotary motion component mounting platform (12) one of them
Gear is connected, and second stepper motor D2 (15) is connected by bearing with another gear of heteromorphic teeth wheel set I (13), special shape gear
Secondary I (13) by be located at the mechanical connection component (24) of longitudinal direction and rotary motion component mounting platform (12) respectively with longitudinal movement
Longitudinal movement component S1 (16), the longitudinal movement component S2 (17) of control mechanism II is connected；The microphone array is longitudinally transported
Dynamic control mechanism II include longitudinal movement component S1 (16), longitudinal movement component S2 (17), they pass through mechanical connection group respectively
Part (24) is connected with heteromorphic teeth wheel set I (13), and longitudinal movement component S1 (16) is also transported by its screw rod bushing I (1606) and vertical
The rack G3 (1801) of dynamic component S1 (18) is connected, and longitudinal movement component S2 (17) also passes through its screw rod bushing II (1706) and heavily fortified point
It is connected to the rack G4 (1901) of moving parts S2 (19)；The microphone array vertical motion control mechanism IV includes vertical
Moving parts S1 (18), vertical motion component S2 (19), vertical motion component S1 (18) is by its screw rod bushing III (1806) and passes
The matrix T2 (2101) of the main installing arm S2 (21) of microphone array of sound device array transverse movement control mechanism V is connected, vertical to transport
Dynamic component S2 (19) pass through the main peace of microphone array of its screw rod bushing IV (1906) and microphone array transverse movement control mechanism V
The matrix T1 (2001) for filling arm S1 (20) is connected；The microphone array transverse movement control mechanism V includes microphone array
Main installing arm S1 (20), the main peace arm S2 (21) of microphone array, a plurality of microphone array divide installing arm (22), multiple microphones
(23) it forms, microphone array point installing arm (22) is separately mounted to the main installing arm S1 (20) of microphone array, microphone array
On main installing arm S2 (21), microphone (23) is mounted on microphone array point installing arm (22)；The microphone correction control
Mechanism VI processed includes microphone correction mechanism I (25) and microphone correction mechanism II (26), microphone correction mechanism I (25) and is passed
Sound device aligning gear II (26) is fixed on vertical motion component S2 (19), vertical motion component S1 (18) respectively；The adjusting
Support I (1) includes lead screw motor M1 (102), pedestal I (101), and lead screw motor M1 (102) is inner mounted in pedestal I (101), adjusts branch
Support II (2) includes lead screw motor M2 (202), pedestal II (201), and lead screw motor M2 (202) is inner mounted in pedestal II (201), is adjusted
Support III (3) includes lead screw motor M3 (302), pedestal III (301), and lead screw motor M3 (302) is inner mounted in pedestal III (301).
2. a kind of small-sized acoustical holography measurement of free found field and inverting device as described in claim 1, it is characterised in that described
Longitudinal movement component S1 (16) includes rack G1 (1601), bearing S1 (1602), screw rod I (1605), screw rod bushing I (1606), axis
S2 (1607), gear pair II (1603), third stepper motor D3 (1604) are held, wherein one in longitudinal two plates of rack G1 (1601)
Block plate inner surface is equipped with sliding slot II (1609), another piece of plate inner surface is equipped with sliding slot I (1608), and bearing S2 (1607) is fixed on machine
Frame G1 (1601) transverse direction two boards in it is one of on, bearing S2 (1607) is connected with screw rod I (1605) one end, rack G1
(1601) laterally fixing bearing S1 (1602) on another block of plate, bearing S1 (1602) are connected with screw rod I (1605) other end, and
Screw rod I (1605) passes through bearing S1 (1602) and is connected with gear pair II (1603) one of gear, in gear pair II (1603)
Another gear is connected with third stepper motor D3 (1604), and screw rod bushing I (1606) covers on screw rod I (1605), screw rod bushing I
(1605) transverse bar is respectively placed on sliding slot I (1608), sliding slot II (1609)；The longitudinal movement component S2 (17) includes
Rack G2 (1701), bearing S3 (1702), screw rod II (1705), screw rod bushing II (1706), bearing S4 (1707), gear pair III
(1703), one of plate inner surface is equipped with sliding slot in longitudinal two plates of the 4th stepper motor D4 (1704), rack G2 (1701)
IV (1709), another piece of plate inner surface are equipped with sliding slot III (1708), and bearing S4 (1707) is fixed on rack G2 (1701) lateral two
In block plate on one of plate, bearing S4 (1707) is connected with screw rod II (1705) one end, and laterally another piece of rack G2 (1701)
It is fixed on plate bearing S3 (1702), bearing S3 (1702) is connected with screw rod II (1705) other end, and screw rod II (1705)
It is connected across bearing S3 (1702) with gear pair III (1703) one of gear, another gear in gear pair III (1703)
It is connected with the 4th stepper motor D4 (1704), screw rod bushing II (1706) covers on screw rod II (1705), screw rod bushing II's (1705)
Transverse bar is respectively placed on sliding slot III (1708), sliding slot IV (1709)；The vertical motion component S1 (18) includes rack G3
(1801), bearing S5 (1802), screw rod III (1805), screw rod bushing III (1806), bearing S6 (1807), gear pair IV
(1803), one of plate inner surface, which is equipped with, in longitudinal two plates of the 5th stepper motor D5 (1804), rack G3 (1801) slides
Slot VI (1809), another piece of plate inner surface are equipped with sliding slot V (1808), and bearing S6 (1807) is fixed on rack G3 (1801) lateral two
In block plate on one of plate, bearing S6 (1807) is connected with screw rod III (1805) one end, and laterally another piece of rack G3 (1801)
Plate is fixed with bearing S5 (1802), and bearing S5 (1802) is connected with screw rod III (1805) other end, and screw rod III (1805)
Be connected across bearing S5 (1802) with gear pair IV (1803) one of gear, in gear pair IV (1803) another gear with
5th stepper motor D5 (1804) is connected, and screw rod bushing III (1806) covers on screw rod III (1805), screw rod bushing III's (1805)
Transverse bar is respectively placed on sliding slot V (1808), sliding slot VI (1809)；The vertical motion component S2 (19) includes rack G4
(1901), bearing S7 (1902), screw rod IV (1905), screw rod bushing IV (1906), bearing S8 (1907), gear pair V (1903),
One of plate inner surface is equipped with sliding slot VIII in longitudinal two plates of six stepper motor D6 (1904), rack G4 (1901)
(1909), another piece of inner surface is equipped with sliding slot VII (1908), and bearing S8 (1907) is fixed on laterally two pieces of rack G4 (1901)
In plate on one of plate, bearing S8 (1907) is connected with screw rod IV (1905) one end, the lateral another block of plate of rack G4 (1901)
On be fixed with bearing S7 (1902), bearing S7 (1902) is connected with screw rod IV (1905) other end, and screw rod IV (1905) is worn
It crosses bearing S7 (1902) to be connected with gear pair V (1903) one of gear, another gear and the 6th in gear pair V (1903)
Stepper motor D6 (1904) is connected, and screw rod bushing IV (1906) covers on screw rod IV (1905), the transverse bar of screw rod bushing IV (1905)
It is respectively placed on sliding slot VII (1908), sliding slot VIII (1909).
3. a kind of small-sized acoustical holography measurement of free found field and inverting device as described in claim 1, it is characterised in that described
The main installing arm S1 (20) of microphone array includes (2001) matrix T1, and one end of matrix T1 (2001) is equipped with bearing S10 (2005),
The other end is equipped with bearing S9 (2002), be among matrix T1 (2001) it is hollow, be equipped with rack I (2007), rack I (2007)
Both ends difference fixing bearing S10 (2005), on bearing S9 (2002), matrix T1 (2007) is equipped with stepper motor D7 on one side
(2003), stepper motor D7 (2003) is fixed on matrix T1 (2001), and gear is housed on the 7th stepper motor D7 (2003) axis
W1 (2004), gear W1 (2004) are engaged by recess I (2006) with rack I (2007), and matrix T1 (2001) another side is set
There are multiple open recess for installing microphone array point installing arm (22), matrix T1 (2001) upper end is additionally provided with calibration microphone
I(27)；The main installing arm S2 (21) of the microphone array includes (2101) matrix T2, and one end of matrix T2 (2101) is equipped with axis
Hold S12 (2105), the other end is equipped with bearing S11 (2102), be among matrix T2 (2101) it is hollow, rack II is housed
(2107), both ends difference fixing bearing S12 (2105) of rack II (2107), on bearing S11 (2102), matrix T2 (2101)
It is equipped with the 8th stepper motor D8 (2103) on one side, the 8th stepper motor D8 (2103) is fixed on matrix T2 (2101), the 8th step
Gear W2 (2104) are housed on into motor D8 (2103) axis, gear W2 (2104) passes through recess II (2106) and rack II
(2107) it engages, matrix T2 (2101) another side is equipped with multiple open slots for installing microphone array point installing arm (22), base
Body T1 (2101) upper end is additionally provided with calibration microphone II (28)；The microphone array point installing arm (22) includes substrate
(2202), substrate (2202) back side two sides are equipped with rack gear (2201), and front is equipped with multiple microphones insertion pedestal (2203), transaudient
Device (23) Probe microphone is inserted on pedestal (2203).
4. a kind of small-sized acoustical holography measurement of free found field and inverting device as described in claim 1, it is characterised in that described
Microphone calibration control mechanism I (25) includes the 9th stepper motor D9 (2501), sleeve I (2502), microphone insert port I
(2503), miniature noise elimination cavity I (2504), reciprocity acoustic transducer G1 (2505), spring I (2506), connector L1 (2507), mutually
Easy acoustic transducer G2 (2508), electromagnet P1 (2509), double sliding slot C1 (2510), electromagnetic coil U1 (2511), the 9th stepping
Motor D9 (2501) is fixed on the rack G4 (1901) of vertical motion component S2 (19), and the 9th stepper motor D9 (2501) passes through
Screw rod is connected with connector L1 (2507) one end, and connector L1 (2507) other end is connected with sleeve I (2502), sleeve I
(2502) internal to be equipped with a cylindrical half-via, double sliding slot C1 (2510) and electromagnet P1 (2509), electromagnet are equipped in hole
The ear bar of P1 (2509) is placed on double sliding slot C1 (2510), while electromagnet P1 (2509) is equipped with electromagnetic coil U1 (2511),
Electromagnet P1 (2509) other end is cased with spring I (2506) and is connected with miniature noise elimination cavity I (2504), miniature noise elimination cavity I
(2504) internal one end is equipped with reciprocity acoustic transducer G1 (2505), and the other end is equipped with reciprocity acoustic transducer G2 (2508), separately
Microphone insert port I (2503) is equipped in the middle part of outer miniature noise elimination cavity I (2504)；Microphone calibration control mechanism II (26) packet
Include the tenth stepper motor D10 (2601), sleeve II (2602), microphone insert port II (2603), miniature noise elimination cavity II (2604),
Reciprocity acoustic transducer G3 (2605), spring II (2606), connector L2 (2607), reciprocity acoustic transducer G4 (2608), electricity
Magnet P2 (2609), double sliding slot C2 (2610), electromagnetic coil U2 (2611), the tenth stepper motor D10 (2601) are fixed on vertically
On the rack G3 (1801) of moving parts S1 (18), the tenth stepper motor D10 (2601) passes through screw rod and connector L2 (2607)
One end is connected, and connector L2 (2607) other end is connected with sleeve II (2602), and a cylinder is equipped with inside sleeve II (2602)
Shape half-via, double sliding slot C2 (2610) and electromagnet P2 (2609) are equipped in hole, and the ear bar of electromagnet P2 (2609) is placed on double cunnings
On slot C2 (2610), while electromagnet P2 (2609) is equipped with electromagnetic coil U2 (2611), and electromagnet P2 (2609) other end is cased with
Spring II (2606) and with miniature noise elimination cavity II (2604), the internal one end of miniature noise elimination cavity II (2604) is equipped with reciprocity acoustic transducer
Device G3 (2605), the other end are equipped with reciprocity acoustic transducer G4 (2608), are in addition equipped with and pass in the middle part of miniature noise elimination cavity II (2604)
Sound device insert port II (2603).
5. a kind of small-sized acoustical holography measurement of free found field and inverting device as described in claim 1, it is characterised in that described
It includes bracket (29) that reference position measurement column VI, which is arranged, in virtual ball, and bracket (29) is connected with vertical rod (30), on vertical rod (30)
End is equipped with laser emitter (31), and upper end is equipped with microphone socket (32).
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| CN112432698A (en) * | 2020-11-12 | 2021-03-02 | 中国航空工业集团公司北京长城计量测试技术研究所 | Double-coil standard vibration table with reciprocity |
| CN117429888A (en) * | 2023-12-20 | 2024-01-23 | 珠海博杰电子股份有限公司 | High-precision flexible parallel adjusting mechanism |
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