CN109959445A - Intelligent sound intensity scanning system - Google Patents
Intelligent sound intensity scanning system Download PDFInfo
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- CN109959445A CN109959445A CN201910251726.5A CN201910251726A CN109959445A CN 109959445 A CN109959445 A CN 109959445A CN 201910251726 A CN201910251726 A CN 201910251726A CN 109959445 A CN109959445 A CN 109959445A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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Abstract
The invention discloses a kind of intelligent sound intensity scanning systems, including sound intensity testing unit, mechanical scanner, camera and general control system, Sound intensity probe and globe lamp to be mounted on sensor stand, and globe lamp is symmetrical about the center probe of Sound intensity probe；Sound intensity probe assembly is mounted on mechanical scanner and carries out Bit andits control by mechanical scanner；Camera is fixed on Sound intensity probe rear and is set as being shot in sound intensity scanning process, and sound intensity testing unit, mechanical scanner, camera and the general control system are respectively connected with and are controlled and worked by control system.The present invention realizes high efficiency in sound field, the scanning of the high-precision sound intensity, the application value with higher in terms of the quick identification and accurate positioning of sound source.
Description
Technical field
The present invention relates to acoustical testing field more particularly to a kind of intelligent sound intensity scanning systems.
Background technique
Multiple noise sources are usually contained in complicated sound field environment, the identification and positioning to Main Noise Sources are control
The premise and basis of noise.Since the sound intensity has directionality, do not limited by environment with sound intensity technique measurement acoustical power, without high
Expensive noise elimination laboratory carries out, so carrying out positioning to noise source by sound intensity technique in engineering has more application.
Sound intensity technique carries out noise source positioning, when carrying out sound intensity testing to sound source using discrete point method, it is necessary first to sound source
Measurement surface carry out test binning, the midpoint of each face element is exactly the measuring point of discrete sound intensity testing.By the sound intensity when test
The vertical measured surface of sensor axis successively measures the sound intensity in the surface normal direction in measurement surface at each measuring point, then
Sound intensity cloud charts are drawn according to the value of each point, the position of Main Noise Sources is determined according to the size of sound intensity value.This method
Precision is higher, but cumbersome, needs to take a substantial amount of time, and limits its application in engineering.
Patent " a kind of sound intensity testing bracket " (China Patent No.: 200910185837.7) proposes a kind of automanual sound intensity
Test bracket reaches specified position by the Sound intensity probe on manual control track, and the sound intensity carried out under dangerous situation is surveyed
Examination has certain advance relative to manual scanning, but by the position of manual adjustment Sound intensity probe, operates still numerous
Trivial inconvenience.It is proposed quickly to position based on image recognition technology Sound intensity probe in the position in space there are also related Chinese patent,
It proposes in the patent, light source is tied up on sound intensity probe, mobile Sound intensity probe passes through knowledge in region surface uniform speed scanning to be measured
The position of other light source in the picture, obtains the position of sound intensity probe in the picture.But in the center and sound intensity probe of light source
The heart is not consistent, and positioning sound intensity probe position by light source, there are deviations；It, can be right if there is other light sources in tested region
Light source positioning sound intensity probe interferes, or even generates the positioning of mistake；It goes to scan region to be measured according to uniform speed, if
Expect the resolution ratio of higher sound field, intensive scan path and lower scanning speed need to be used, then scan efficiency is then
Very low, existing scan method is difficult to take into account the resolution ratio of sound field and scan efficiency.
Summary of the invention
The technical problem to be solved in the present invention is that providing a kind of intelligent sound intensity scanning system that can overcome above-mentioned technical problem
System can quickly scan sound field there are background light interference, rough estimate distribution of sound field, then root
It is automatic to plan that scan path and speed are scanned again according to the sound field resolution parameter of input, guaranteeing sound field resolution ratio
Under the premise of, scan efficiency is improved as far as possible.
In order to solve the above technical problems, the invention provides the following technical scheme:
A kind of intelligence sound intensity scanning system, it is characterised in that including sound intensity testing unit, mechanical scanner, camera and master control
System processed, the sound intensity testing unit include Sound intensity probe assembly and data collection system, and Sound intensity probe assembly is by the sound intensity
Sensor, two globe lamps, sensor stand are constituted, and Sound intensity probe and globe lamp are mounted on sensor stand, globe lamp
Center probe about Sound intensity probe is symmetrical；Sound intensity probe assembly is mounted on mechanical scanner and by mechanical scanning
Device carries out Bit andits control；Camera is fixed on Sound intensity probe rear and is set as being shot in sound intensity scanning process,
Sound intensity testing unit, mechanical scanner, camera and the general control system be respectively connected with and controlled by control system and
Work.
Further, Sound intensity probe two sides are arranged in shooting process and summarize the spherical shape for capableing of checker feux rouges and green light
Lamp, camera shoots sound intensity scanning process, and is set as positioning position of the lampet in figure by way of image procossing, thus
Obtain the scan path of sound intensity probe.
Further, the cruciformity that sensor stand is vertically arranged respectively is arranged one in the transverse arm two ends of cross
A globe lamp is arranged in the front end of each semi-girder in a horizontal semi-girder forward；Sound intensity probe is arranged in the vertical arm top of cross,
Sound intensity probe integral level extends on the vertical arm top for being suspended at cross toward front；Sound intensity probe and two semi-girders are mutual
It is arranged in parallel, globe lamp is symmetrical about Sound intensity probe center probe.
Further, globe lamp strut is vertically arranged and is fixed on the front end of each semi-girder, the centre-height and sound of globe lamp
Vertical height where the center probe of strong sensor is roughly the same.
Further, the vertical arm bottom end setting one of sensor stand is parallel with Sound intensity probe extending direction opposite direction
Support arm, the end of the support arm is fixed on the top of mechanical arm.
Further, the mechanical scanner includes mechanical arm, hoistable platform and dolly chassis, and hoistable platform is by step
It is formed into motor, screw rod, lifting platform and lifting platform guide post, stepper motor is arranged on dolly chassis, lifting platform and trolley bottom
Disk parallel interval setting up and down, lifting platform are fixed on the drive screw, and drive screw rod in vertical direction by stepper motor
Upper movement, in moving process, the periphery of lifting platform carries out guiding constraint by lifting guide post；Mechanical scanner being capable of band
Dynamic Sound intensity probe assembly realizes the mobile feeding in top to bottom, left and right, front and rear direction.
Further, after intelligent sound intensity scanning system opening, two globe lamps alternately issue green light and feux rouges, meanwhile,
Camera and sound intensity test cell are opened, camera is fixed on sound intensity scanning means rear, and shoots the whole of lower sound intensity scanning
Process, the sound intensity signal in sound intensity testing unit synchronism detection scanning process, the frequency etc. of two globe lamp checker colors
In the frame per second of camera shooting.
Further, after the end of scan, general control system handles each frame image of shooting video, reads first
Then the coordinate of point of the red color component value of each pixel greater than 200 in piece image reads each pixel in lower piece image
The coordinate of point of the green component values of point greater than 200, the red color component value for then reading each pixel in lower piece image again are big
In the coordinate of 200 point, according to this alternately；Later, the coordinate points read to front and back two images seek common ground, intersection portion
It is divided to the picture point for being considered as two globe lamps, finds out each globe lamp image center respectively, and connect two central points, then take it
Center is considered as the position of sound intensity probe center in the picture；According to this alternately, the scanning road of Sound intensity probe probe is obtained
Diameter, and the sound intensity value simultaneous of the every bit and synchronous acquisition in scan path is got up, sound intensity cloud charts are then drawn out, it will
The scanning area image superposition that sound intensity cloud charts are shot with camera is to the sound intensity distribution clouds that together, can be obtained scanning area
Figure.
Further, this intelligence sound intensity scanning system includes following scanning step:
Step 1: fixing camera shoots an area to be scanned in sound intensity testing unit and to the rear of sound intensity scanning area
The image in domain, plans the range of scanning in the picture, and inputs among general control system, while setting among general control system
Good sound field resolution ratio；
Step 2: general control system plans that sparse scan path is quickly scanned in the region of the scanning of planning automatically,
Obtain the rough distribution map of sound field；
Step 3: based on the rough distribution map of sound field and preset sound field resolution ratio, general control system planning scanning automatically again
Path and speed obtain the fine sound intensity cloud charts of sound field；
In step 3, general control system plan again scan path and speed based on principle be: in the biggish area of sound intensity value
Domain, scan path is more intensive, and scanning speed is slower, improves sound field resolution ratio herein；In the lesser place of sound intensity value, scanning
Path is more sparse, the fast speed of scanning, improves scan efficiency.
The present invention realizes high efficiency in sound field, the scanning of the high-precision sound intensity, in quick identification and the accurate positioning of sound source
Aspect application value with higher.
Intelligent sound intensity scanning system proposed by the present invention as a result, is arranged symmetrically two globe lamps at sound intensity probe center,
In the picture, the center for connecting two globe lamps takes the central point of line as the center of sound intensity probe, can be realized in image
In high-precision positioning is carried out to sound intensity probe, and lampet is distributed in sound intensity probe two sides, itself will not be attached to sound intensity probe
Close acoustic propagation influence of noise；Two spherical lampets and lead to according to the frame per second checker feux rouges and green light of the shooting of video camera
Image of the intersection area of the red area and green area that take two frame picture of front and back as spherical lampet is crossed, even if scanned area
There are white light sources in domain, are all difficult to interfere the positioning at sound intensity probe center, and the stability positioned by this method is non-
Chang Gao；Sound field is determined by the way that first quickly scanning is rough, it is automatic to plan scan path and speed then further according to the resolution ratio of input
Degree, takes into account the precision and efficiency of scanning.Therefore, compared with prior art, the present invention can be there are the feelings that background light interferes
Under condition, sound field is quickly scanned, rough estimate distribution of sound field is automatic to advise then according to the sound field resolution parameter of input
It draws scan path and speed is scanned again, under the premise of guaranteeing sound field resolution ratio, improve scan efficiency as far as possible.It is real
Showed high efficiency in sound field, the scanning of the high-precision sound intensity, sound source it is quick identify with accurate positioning in terms of with higher answer
With value.
Detailed description of the invention
Fig. 1 is the intelligent sound intensity scanning system general construction schematic diagram of the present invention；
Fig. 2 is the Sound intensity probe assembly main view in the intelligent sound intensity scanning system of the present invention；
Fig. 3 is Sound intensity probe assembly side view in the intelligent sound intensity scanning system of the present invention.
In figure, 1, camera；2, dolly chassis；3, lifting platform guide post；4, stepper motor；5, screw rod；6, lifting platform；7,
Mechanical arm；8, Sound intensity probe bracket；9, globe lamp；10, Sound intensity probe；11, object to be measured；12, data collection system；
13, general control system.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
It is the intelligent sound intensity scanning system preferred embodiment realized according to the present invention, including sound intensity testing referring to figs. 1 to Fig. 3
Unit, mechanical scanner, camera 1 and general control system 13, the sound intensity testing unit include Sound intensity probe assembly and
Data collection system 12, data collection system 12 are used to acquire the sound intensity information of Sound intensity probe assembly.Sound intensity testing unit, machine
Tool scanning means is vertically connected with setting, and camera 1 is located at except the two, general control system 13 respectively with sound intensity testing unit, machine
Tool scanning means, camera 1 connect and control respective movement.
Sound intensity probe assembly is made of Sound intensity probe 10, two globe lamps 9, sensor stands 8.Such as the institute of Fig. 2 and 3
Show, the cruciformity that sensor stand 8 is vertically arranged, one level stretching forward is respectively set in the transverse arm two ends of cross
A globe lamp 9 is arranged in the front end of each semi-girder in arm；Sound intensity probe 10, Sound intensity probe is arranged in the vertical arm top of cross
10 integral levels extend on the vertical arm top for being suspended at cross toward front；Sound intensity probe 10 is parallel to each other with two semi-girders and sets
It sets, globe lamp 9 is symmetrical about 10 center probe of Sound intensity probe.
It is preferred that 9 strut of globe lamp is vertically arranged and is fixed on the front end of each semi-girder, the centre-height and the sound intensity of globe lamp 9 are passed
Vertical height where the center probe of sensor 10 is roughly the same.
A branch parallel with 10 extending direction opposite direction of Sound intensity probe is arranged in the vertical arm bottom end of sensor stand 8
Arm, the end of the support arm are fixed on the top of mechanical arm 7.
The mechanical scanner includes mechanical arm 7, hoistable platform and dolly chassis 2, and hoistable platform is by stepper motor
4, screw rod 5, lifting platform 6 and lifting platform guide post 3 form, and mechanical scanner is integrally provided on dolly chassis 2, stepper motor
It is arranged on dolly chassis 2, lifting platform 6 and about 2 parallel interval of dolly chassis are arranged, and lifting platform 6 is fixed on driving screw rod 5
On, and drive screw rod 5 to move in the vertical direction by stepper motor 4, in moving process, the periphery of lifting platform 6 passes through
It goes up and down guide post 3 and carries out guiding constraint.Sound intensity probe assembly is mounted on mechanical scanner, constitutes sound intensity scanning dress
It sets；Sound intensity testing unit, sound intensity scanning means, two globe lamps 9 and the camera 1 is connected with general control system 13, and
It is controlled by it.General control system control 13 under, mechanical scanner can drive Sound intensity probe 10 realize up and down, left and right,
The scanning of front and back.
In the present invention, general control system 13 can be conventional PLC control system or single-chip computer control system or DSP control system
One of system is a variety of.Data collection system 12 includes the sound acquisition module in two channels, for acquiring Sound intensity probe
Signal can be the mainstream chip that this field is applicable at present.
After intelligent sound intensity scanning system of the invention is opened, two globe lamps 9 alternately issue green light and feux rouges, meanwhile,
Camera 1 is fixed on sound intensity scanning means rear, opens camera 1 and sound intensity test cell, and shoots lower sound intensity testing scanning
All processes, the sound intensity signal in sound intensity testing unit synchronism detection scanning process, two 9 checker colors of globe lamp
Frequency is equal to the frame per second of camera shooting.
After the end of scan, each frame image that general control system 13 shoots video to camera 1 is handled, and is read first
Then the coordinate of point of the red color component value (R value) of each pixel greater than 200 in piece image is read each in lower piece image
The coordinate of point of the green component values (G value) of pixel greater than 200, then reads the red of each pixel in lower piece image again
The coordinate of point of the component value (R value) greater than 200, according to this alternately.
The coordinate points read to front and back two images seek common ground, and intersection part is considered as the picture point of two globe lamps 9,
Each 9 image center of globe lamp is found out respectively, and connects two central points, then take its center, is considered as the spy of Sound intensity probe 10
The position of head center in the picture；According to this alternately, the scan path of Sound intensity probe 10 is obtained, and will be in scan path
The sound intensity value simultaneous of every bit and synchronous acquisition gets up, and then draws out sound intensity cloud charts, by sound intensity cloud charts and camera shooting
The scanning area image superposition of first 1 shooting is to the sound intensity cloud charts that together, can be obtained scanning area.
The intelligence sound intensity scanning system course of work is as follows:
Step 1: fixing camera 1 shoots the image in a region to be scanned at the rear in region to be scanned, in the picture
It plans the range of scanning, and inputs among general control system, while setting sound field resolution ratio among general control system 13；
Step 2: general control system 13 plans that sparse scan path is quickly swept in the region of the scanning of planning automatically
It retouches, obtains the rough distribution map of sound field；
Step 3: based on the rough distribution map of sound field and preset sound field resolution ratio, general control system 13 again sweep by automatic planning
Path and speed are retouched, in the biggish region of sound intensity value, scan path is more intensive, and scanning speed is slower, improves sound field herein
Resolution ratio；In the lesser place of sound intensity value, scan path is more sparse, the fast speed of scanning, improves scan efficiency.
The scanning area image superposition that the accurate sound intensity cloud charts scanned again and camera 1 are shot is to one
It rises, can be obtained the accurate sound intensity cloud charts of scanning area, provide judgment basis with accurate positioning for the quick identification of sound source.
As a result, the invention discloses a kind of intelligent sound intensity scanning system, can there are background light interference,
Quickly scanning sound field, rough estimate distribution of sound field, then according to the sound field resolution parameter of input, automatic planning scanning
Path and speed are scanned again, under the premise of guaranteeing sound field resolution ratio, improve scan efficiency as far as possible.Sound intensity sensing
Device two sides are equipped with the spherical lampet of checker feux rouges and green light, are fixed on the camera shooting scanning process at rear, and pass through
The mode of image procossing positions position of the lampet in figure, to obtain the scan path of sound intensity probe.The present invention realizes sound
High efficiency, the scanning of the high-precision sound intensity in, the application value with higher in terms of the quick identification of sound source is with accurate positioning.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure transformation made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant technical fields,
Similarly it is included within the scope of the present invention.
Claims (9)
1. a kind of intelligence sound intensity scanning system, it is characterised in that including sound intensity testing unit, mechanical scanner, camera and total
Control system, the sound intensity testing unit include Sound intensity probe assembly and data collection system, and Sound intensity probe assembly is by sound
Strong sensor, two globe lamps, sensor stand are constituted, and Sound intensity probe and globe lamp are mounted on sensor stand, spherical
Lamp is symmetrical about the center probe of Sound intensity probe；Sound intensity probe assembly is mounted on mechanical scanner and is swept by machinery
Imaging apparatus carries out Bit andits control；Camera is fixed on Sound intensity probe rear and is set as being clapped in sound intensity scanning process
It takes the photograph, sound intensity testing unit, mechanical scanner, camera and the general control system are respectively connected with and are controlled by control system
And it works.
2. intelligence sound intensity scanning system according to claim 1, it is characterised in that the setting of Sound intensity probe two sides is being shot
Process summarizes the globe lamp for capableing of checker feux rouges and green light, and camera shoots sound intensity scanning process, and is set as passing through figure
The mode of picture processing positions position of the lampet in figure, to obtain the scan path of sound intensity probe.
3. intelligence sound intensity scanning system according to claim 1, it is characterised in that sensor stand be vertically arranged ten
The semi-girder of a level forward is respectively arranged in the transverse arm two ends of cross in cabinet frame shape, and a ball is arranged in the front end of each semi-girder
Shape lamp；Sound intensity probe is arranged in the vertical arm top of cross, and Sound intensity probe integral level extends toward front is suspended at cross
Vertical arm top on；Sound intensity probe and two semi-girders are arranged in parallel, and globe lamp is about Sound intensity probe center probe pair
Claim.
4. intelligence sound intensity scanning system according to claim 1, it is characterised in that globe lamp strut is vertically arranged and fixes
In the front end of each semi-girder, the centre-height of globe lamp is roughly the same with the vertical height where the center probe of Sound intensity probe.
5. intelligence sound intensity scanning system according to claim 1, it is characterised in that the vertical arm bottom end of sensor stand is arranged
The end of one support arm parallel with Sound intensity probe extending direction opposite direction, the support arm is fixed on the top of mechanical arm.
6. intelligence sound intensity scanning system according to claim 1, it is characterised in that the mechanical scanner includes machine
Tool arm, hoistable platform and dolly chassis, hoistable platform are made of stepper motor, screw rod, lifting platform and lifting platform guide post, stepping
Motor is arranged on dolly chassis, and parallel interval is arranged up and down for lifting platform and dolly chassis, and lifting platform is fixed on the drive screw,
And drive screw rod to move in the vertical direction by stepper motor, in moving process, the periphery of lifting platform is led by lifting
Guiding constraint is carried out to column；Mechanical scanner is able to drive the shifting that Sound intensity probe assembly realizes top to bottom, left and right, front and rear direction
Dynamic feeding.
7. intelligence sound intensity scanning system according to claim 1, it is characterised in that after intelligent sound intensity scanning system opening,
Two globe lamps alternately issue green light and feux rouges, meanwhile, it opens camera and sound intensity test cell, camera is fixed on the sound intensity and sweeps
Imaging apparatus rear, and all processes of lower sound intensity scanning are shot, the sound intensity letter in sound intensity testing unit synchronism detection scanning process
Number, the frequency of two globe lamp checker colors is equal to the frame per second of camera shooting.
8. intelligence sound intensity scanning system according to claim 1, it is characterised in that after the end of scan, general control system is to bat
The each frame image for taking the photograph video is handled, and the red color component value for reading each pixel in piece image first is greater than 200
Then the coordinate of point reads the coordinate of point of the green component values greater than 200 of each pixel in lower piece image, then reads again
The coordinate of point of the red color component value of each pixel greater than 200 in lower piece image, according to this alternately；Later, to front and back two
The coordinate points of width image reading seek common ground, and intersection part is considered as the picture point of two globe lamps, find out each spherical shape respectively
Lamp image center, and two central points are connected, then take its center, it is considered as the position of sound intensity probe center in the picture；According to this
Alternately, the scan path of Sound intensity probe probe is obtained, and by the sound intensity of every bit and synchronous acquisition in scan path
Value simultaneous gets up, and then draws out sound intensity cloud charts, and the scanning area image that sound intensity cloud charts are shot with camera is folded
It is added together, it can be obtained the sound intensity cloud charts of scanning area.
9. intelligence sound intensity scanning system according to claim 1, it is characterised in that this intelligence sound intensity scanning system includes such as
Lower scanning step:
Step 1: fixing camera shoots an area to be scanned in sound intensity testing unit and to the rear of sound intensity scanning area
The image in domain, plans the range of scanning in the picture, and inputs among general control system, while setting among general control system
Good sound field resolution ratio；
Step 2: general control system plans that sparse scan path is quickly scanned in the region of the scanning of planning automatically,
Obtain the rough distribution map of sound field；
Step 3: based on the rough distribution map of sound field and preset sound field resolution ratio, general control system planning scanning automatically again
Path and speed obtain the fine sound intensity cloud charts of sound field；
In step 3, general control system plan again scan path and speed based on principle be: in the biggish area of sound intensity value
Domain, scan path is more intensive, and scanning speed is slower, improves sound field resolution ratio herein；In the lesser place of sound intensity value, scanning
Path is more sparse, the fast speed of scanning, improves scan efficiency.
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| CN111504446A (en) * | 2020-04-03 | 2020-08-07 | 武汉理工大学 | Test system for surface sound intensity distribution on automatic scanning equipment |
| CN115683323A (en) * | 2022-12-29 | 2023-02-03 | 杭州兆华电子股份有限公司 | Sound power measuring system and method of sound generating equipment |
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| CN109959445B (en) | 2020-10-16 |
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