CN108344504A - Noise detection system and analysis method in 8 road car of one kind - Google Patents
Noise detection system and analysis method in 8 road car of one kind Download PDFInfo
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- CN108344504A CN108344504A CN201810409442.XA CN201810409442A CN108344504A CN 108344504 A CN108344504 A CN 108344504A CN 201810409442 A CN201810409442 A CN 201810409442A CN 108344504 A CN108344504 A CN 108344504A
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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- G01M17/007—Wheeled or endless-tracked vehicles
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Abstract
The present invention relates to noise detection systems in a kind of 8 road car, including sonic transducer group, data collecting card and computer equipment；The sonic transducer group includes rear-guard sonic transducer, left back door sonic transducer, skylight sonic transducer, left front door sonic transducer, transmission shaft sonic transducer, engine sonic transducer, right-rear-door sonic transducer and right front door sonic transducer, the rear-guard sonic transducer is arranged on the rear wheel drive of automobile, the left back door sonic transducer is arranged on the left back door of automobile, the skylight sonic transducer is arranged on the skylight of automobile, the left front door sonic transducer is arranged on the left front door of automobile, the transmission shaft sonic transducer is arranged on the transmission shaft of automobile, the engine sonic transducer is arranged on the transmitter of automobile；The sonic transducer group is connected to computer equipment by data collecting card；It can find that failure has occurred in certain positions of automobile in time, can maintenance prompt be carried out to the failure in time.
Description
Technical field
The present invention relates to automobile noise detection field, more particularly to noise detection system and analysis method in a kind of 8 road car.
Background technology
Have become the main means of transport of the mankind with the development and scientific progress, automobile of society, is the trip of people
It brings conveniently；And more and more people possess automobile now, and automobile is with the process used, the different parts of automobile can go out
Existing different problems, and when the different parts of automobile just go wrong, these problems can not be found in time, if too late
When handled for the position problems of these automobiles, the more serious damage of automobile can be caused.
Invention content
For this reason, it may be necessary to provide noise detection system and analysis method in 8 road car of one kind, solve existing when automobile goes wrong
When, the problem of can not pinpointing the problems in time.
To achieve the above object, noise detection system in 8 road car of one kind, including sonic transducer group, number are inventor provided
According to capture card and computer equipment；
The sonic transducer group includes rear-guard sonic transducer, left back door sonic transducer, skylight sonic transducer, left front door sound biography
Sensor, transmission shaft sonic transducer, engine sonic transducer, right-rear-door sonic transducer and right front door sonic transducer, the rear-guard sound
Sensor is arranged on the rear wheel drive of automobile, and the left back door sonic transducer is arranged on the left back door of automobile, the skylight
Sonic transducer is arranged on the skylight of automobile, and the left front door sonic transducer is arranged on the left front door of automobile, the transmission shaft
Sonic transducer is arranged on the transmission shaft of automobile, and the engine sonic transducer is arranged on the transmitter of automobile, the back door
Sonic transducer is arranged on the right-rear-door of automobile, and the right front door sonic transducer is arranged on the right front door of automobile；
The sonic transducer group is connected to computer equipment by data collecting card；
The computer equipment includes sound data acquisition module, detection and analysis module, abnormal sound defect location module and sound source
Identification module；
The sound data acquisition module is used for the acoustical signal by each sound sensing acquisition in sonic transducer group；
The detection and analysis module obtains each sound sensing acquisition for analyzing the collected acoustical signal of each sonic transducer
Acoustical signal Time-Frequency Information parameter；
The Time-Frequency Information parameter for the acoustical signal that the abnormal sound defect location module is used to be acquired according to each sonic transducer is sentenced
Whether the acoustical signal of disconnected acquisition is abnormal, three-dimensional fixed according to the time difference foundation for collecting abnormal acoustical signal if abnormal
Azimuth equation solves the sound source position for positioning abnormal acoustical signal；
The identification of sound source module is used to judge whether to safeguard according to the sound source position for navigating to abnormal acoustical signal, if
It needs to safeguard and then be reminded.
It advanced optimizes, each sonic transducer in the sonic transducer group is connected to number by pre-processing amplifier respectively
According to capture card.
It advanced optimizes, the computer equipment is car running computer.
It advanced optimizes, the computer equipment further includes data management module, and the data management module is for recording
The Time-Frequency Information parameter for the acoustical signal analyzed every time, and preserve the characteristic fingerprint of each abnormal sound acoustical signal.
It advanced optimizes, the computer equipment further includes trend analysis module, and the trend analysis module is used for basis
The internal car noise of the video information parameter of data management module record and the characteristic fingerprint analysis automobile of each abnormal sound acoustical signal becomes
Change situation.
It advanced optimizes, the computer equipment further includes parameter setting module, and the parameter setting module is used for sound
The parameter and sample rate of each sonic transducer in sensor group are configured.
Inventor additionally provides another technical solution：Noise measuring analysis method in 8 road car of one kind, including following step
Suddenly：
Pass through the acoustical signal of each sound sensing acquisition in sonic transducer group；
The collected acoustical signal of each sonic transducer is analyzed, the Time-Frequency Information ginseng of the acoustical signal of each sound sensing acquisition is obtained
Number；
Judge whether the acoustical signal of acquisition is abnormal according to the Time-Frequency Information parameter of the acoustical signal of each sonic transducer acquisition,
Three-dimensional localization equation is established according to the time difference for collecting abnormal acoustical signal if abnormal, solves and positions abnormal sound
The sound source position of signal；
Judge whether to need to safeguard according to the sound source position for navigating to abnormal acoustical signal, if desired safeguards, carried
It wakes up.
It advanced optimizes, it is described " acquisition to be judged according to the Time-Frequency Information parameter of the acoustical signal of each sonic transducer acquisition
Whether acoustical signal is abnormal, and three-dimensional localization equation is established according to the time difference for collecting abnormal acoustical signal if abnormal,
Solve the sound source position for positioning abnormal acoustical signal " further include later：
The Time-Frequency Information parameter for the acoustical signal analyzed every time is recorded, and preserves the characteristic fingerprint of each abnormal sound acoustical signal.
It advanced optimizes, described " the Time-Frequency Information parameter for the acoustical signal that record is analyzed every time, and preserve each Abnormal Sound letter
Number characteristic fingerprint " further include step：
The internal car noise that automobile is analyzed according to the characteristic fingerprint of the video information parameter of record and each abnormal sound acoustical signal becomes
Change situation.
It advanced optimizes, further includes step before described " passing through the acoustical signal of each sound sensing acquisition in sonic transducer group "
Suddenly：
The parameter and sample rate of each sonic transducer in sonic transducer group are configured.
It is different from the prior art, above-mentioned technical proposal, it is right by being arranged sonic transducer group on the different location of automobile
The acoustical signal that the different positions of automobile generate is monitored, and the acoustical signal of acquisition is sent to computer equipment, passes through meter
It calculates machine equipment to analyze the acoustical signal of acquisition, whether analysis acoustical signal is abnormal sound acoustical signal, and works as and detect as acoustical signal
For abnormal sound acoustical signal when, then after positioning the position of acoustical signal, carry out judging whether to need to safeguard, if desired safeguard then into
Row prompt, abnormal sound acoustical signal can occur according to automobile and be monitored to the abnormal sound acoustical signal that automobile occurs when something goes wrong, can
Find that failure has occurred in certain positions of automobile, can carry out maintenance prompt to the failure in time in time.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of noise detection system in 8 road car described in specific implementation mode；
Fig. 2 is a kind of structural schematic diagram of computer equipment described in specific implementation mode,
Fig. 3 is a kind of flow diagram of noise measuring detection and analysis in 8 road car described in specific implementation mode.
Reference sign：
111, rear-guard sonic transducer,
112, left back door sonic transducer,
113, skylight sonic transducer,
114, left front door sonic transducer,
115, transmission shaft sonic transducer,
116, engine sonic transducer,
117, right-rear-door sonic transducer,
118, right front door sonic transducer,
119, amplifier is pre-processed,
120, data collecting card,
130, computer equipment,
131, sound data acquisition module,
132, module is tested and analyzed,
133, abnormal sound defect location module,
134, identification of sound source module,
135, data management module,
136, trend analysis module,
137, parameter setting module.
Specific implementation mode
For the technology contents of technical solution, construction feature, the objects and the effects are described in detail, below in conjunction with specific reality
It applies example and attached drawing is coordinated to be explained in detail.
It please refers to Fig.1 and Fig. 2, noise detection system in 8 road car of the present embodiment, including sonic transducer group, data collecting card
120 and computer equipment 130；
The sonic transducer group include rear-guard sonic transducer 111, left back door sonic transducer 112, skylight sonic transducer 113,
Before left front door sonic transducer 114, transmission shaft sonic transducer 115, engine sonic transducer 116, right-rear-door sonic transducer 117 and the right side
Door sonic transducer 118, the rear-guard sonic transducer 111 are arranged on the rear wheel drive of automobile, the left back door sonic transducer 112
It is arranged on the left back door of automobile, the skylight sonic transducer 113 is arranged on the skylight of automobile, the left front door sonic transducer
114 are arranged on the left front door of automobile, and the transmission shaft sonic transducer 115 is arranged on the transmission shaft of automobile, the engine
Sonic transducer 116 is arranged on the transmitter of automobile, and the right-rear-door sonic transducer 117 is arranged on the right-rear-door of automobile, institute
Right front door sonic transducer 118 is stated to be arranged on the right front door of automobile；Sonic transducer group includes No. eight sonic transducers, eight road sound of Jiang Zhe
Sensor is arranged on the different location of automobile, and the acoustical signal generated to these different locations of automobile is acquired.
The sonic transducer group is connected to computer equipment 130 by data collecting card 120；And when sonic transducer collects
Computer equipment 130 is sent to by data collecting card 120 after these acoustical signals.
The computer equipment 130 includes sound data acquisition module 131, detection and analysis module 132, abnormal sound defect location mould
Block 133 and identification of sound source module 134；
The sound data acquisition module 131 is used for the acoustical signal by each sound sensing acquisition in sonic transducer group；
The detection and analysis module 132 obtains each sound sensing for analyzing the collected acoustical signal of each sonic transducer
The Time-Frequency Information parameter of the acoustical signal of acquisition；
The Time-Frequency Information parameter for the acoustical signal that the abnormal sound defect location module 133 is used to be acquired according to each sonic transducer
Judge whether the acoustical signal of acquisition is abnormal, three-dimensional is established according to the time difference for collecting abnormal acoustical signal if abnormal
Positioning equation solves the sound source position for positioning abnormal acoustical signal；
The identification of sound source module 134 is used to judge whether to tie up according to the sound source position for navigating to abnormal acoustical signal
Shield, if desired safeguards, is reminded.
Computer equipment 130 actively calls data collecting card 120 in sonic transducer group by sound data acquisition module 131
Each sonic transducer detection acoustical signal be acquired, wherein data collecting card 120 be eight road simultaneous data-acquisitions, when
When collecting acoustical signal, by analyzing the collected acoustical signal of each sonic transducer, obtains automobile and send out noise not
With the Time-Frequency Information parameter of the acoustical signal at position, wherein Time-Frequency Information parameter includes the sound intensity, acoustic pressure and frequency etc., is then being passed through
Abnormal sound defect location module 133 carries out judging acquisition according to the Time-Frequency Information parameter of the collected acoustical signal of each sonic transducer
Whether acoustical signal is normal, establishes three-dimensional localization equation according to the time difference of collected acoustical signal if abnormal, and to three-dimensional
Positioning equation, which is solved to obtain the position for sending out abnormal acoustical signal, to be positioned, then is sentenced by identification of sound source module 134
Whether the disconnected position for being abnormal acoustical signal need to safeguard, and when needing to safeguard, then it is reminded.Wherein computer equipment
130 be car running computer.
Wherein, can also be abnormal acoustical signal according to the collected acoustical signal of sonic transducer at which position, it is determined that should
Position is the position that abnormal acoustical signal occurs, and it is abnormal acoustical signal such as to work as the acoustical signal that rear-guard sonic transducer 111 detects, then vapour
The rear wheel drive of vehicle is the position that abnormal acoustical signal occurs.In order to which the position for being abnormal acoustical signal is accurately positioned, then by adopting
The time difference of the acoustical signal collected establishes three-dimensional localization equation, and is solved to obtain to three-dimensional localization equation and send out abnormal sound letter
Number position positioned.Specifically, being by the method that the time difference of acoustical signal establishes three-dimensional position：Wherein it is adsorbed on automobile
Interior sonic transducer number is 8, and prevalence of the sound wave in vehicle is Ve, is ti from noise source to i-th of sensor time, such as
Fruit is as a reference point with the sensor for receiving first acoustical signal, and such i-th of sensor is passed with respect to the sound wave of reference sensor
Sowing time difference can measure (ti-0), can meet hyperboloid equation to the opposite acoustic transit time of each sensor：This
In：Ti is the acoustic transit time from noise source to i-th of sensor, when t0 is Acoustic Wave Propagation of the noise source to reference sensor
Between, so：
It only needs to include reference sensor 4 or more in this way, 3 above formula equations can be listed, joint is solved, can be obtained
To noise source position coordinates, that is, obtain anchor point.
Specifically, such as by each sonic transducer of sonic transducer group carry out the acoustical signal of the different parts of automobile
Acquisition such as judges that rear-guard sound senses if the acoustical signal that rear-guard sonic transducer 111 detects is judged as abnormal acoustical signal by analysis
The sound intensity in 111 collected acoustical signal of device be more than preset value or acoustic pressure not within a preset range or frequency is not default
In range；Then it is carried out according to the time difference of 111 collected acoustical signal of rear-guard sonic transducer to being abnormal acoustical signal
Position is positioned, and the position of the abnormal acoustical signal then occurred according to positioning carries out judging whether the position needs to safeguard, such as
The gearbox that the position is rear wheel drive is accurately positioned and sends out abnormal acoustical signal, and judges the exception acoustical signal in preset range
It when interior, is then prompted without safeguarding, and then carries out maintenance prompting when more than preset range.
In the present embodiment, it since the signal of sonic transducer acquisition is WeChat ID, needs through enhanced processing, then the sound
Each sonic transducer in sensor group is connected to data collecting card 120 by pre-processing amplifier 118 respectively.By sonic transducer
The collected acoustical signal of each sonic transducer in group is passing through number after preposition pretreatment amplifier 118 is amplified
Computer equipment 130 is sent to according to capture card 120 handle acoustical signal.
In the present embodiment, the computer equipment 130 further includes data management module 135, the data management module
The 135 Time-Frequency Information parameter for recording the acoustical signal analyzed every time, and preserve the characteristic fingerprint of each abnormal sound acoustical signal.Pass through
The characteristic fingerprint of the Time-Frequency Information parameter of the collected acoustical signal of sonic transducer and each abnormal sound acoustical signal is saved in data pipe
It manages in module 135, further can accurately be compared, the sound that the later stage can be made to acquire sonic transducer according to the data of storage
Signal is analyzed and is judged more acurrate.Wherein, the computer equipment 130 further includes trend analysis module 136, the trend analysis
The characteristic fingerprint point for the video information parameter and each abnormal sound acoustical signal that module 136 is used to be recorded according to data management module 135
Analyse the internal car noise situation of change of automobile.
In the present embodiment, computer equipment 130 further includes parameter setting module 137, by parameter setting module 137 into
Row is configured the parameter and sample rate of each sonic transducer in sonic transducer group, and setting sonic transducer acquires acoustical signal
Time-Frequency Information parameter within a preset range when, then to sonic transducer acquisition acoustical signal analyze, or setting sonic transducer
Acquisition rate, such as carry out being acquired acoustical signal by sonic transducer at interval of preset time, reduce the wasting of resources.
Referring to Fig. 3, in another embodiment, noise measuring analysis method in 8 road car of one kind includes the following steps：
Pass through the acoustical signal of each sound sensing acquisition in sonic transducer group；
The collected acoustical signal of each sonic transducer is analyzed, the Time-Frequency Information ginseng of the acoustical signal of each sound sensing acquisition is obtained
Number；
Judge whether the acoustical signal of acquisition is abnormal according to the Time-Frequency Information parameter of the acoustical signal of each sonic transducer acquisition,
If abnormal then follow the steps S340, S310 is returned to step if normal.
Three-dimensional localization equation is established according to the time difference for collecting abnormal acoustical signal, solves and positions abnormal sound letter
Number sound source position；
Judge whether to need to safeguard according to the sound source position for navigating to abnormal acoustical signal, if desired safeguards, execute step
Rapid 360, if need not if return to step 310.
It safeguards and reminds.
By actively calling data collecting card 120 to carry out the acoustical signal of each sonic transducer detection in sonic transducer group
Acquisition, wherein data collecting card 120 is eight road simultaneous data-acquisitions 120, when collecting acoustical signal, by each sound
The collected acoustical signal of sensor is analyzed, obtain automobile send out noise different parts acoustical signal Time-Frequency Information ginseng
Number, wherein Time-Frequency Information parameter includes the sound intensity, acoustic pressure and frequency etc., then according to the collected acoustical signal of each sonic transducer
Time-Frequency Information parameter judge whether the acoustical signal of acquisition is normal, according to the time difference of collected acoustical signal if abnormal
It establishes three-dimensional localization equation, and three-dimensional localization equation is solved to obtain the position for sending out abnormal acoustical signal and is positioned, then
Judge whether the position for being abnormal acoustical signal needs to safeguard, and when needing to safeguard, then it is reminded.
Wherein, can also be abnormal acoustical signal according to the collected acoustical signal of sonic transducer at which position, it is determined that should
Position is the position that abnormal acoustical signal occurs, and it is abnormal acoustical signal such as to work as the acoustical signal that rear-guard sonic transducer 111 detects, then vapour
The rear wheel drive of vehicle is the position that abnormal acoustical signal occurs.In order to which the position for being abnormal acoustical signal is accurately positioned, then by adopting
The time difference of the acoustical signal collected establishes three-dimensional localization equation, and is solved to obtain to three-dimensional localization equation and send out abnormal sound letter
Number position positioned.
Specifically, such as by each sonic transducer of sonic transducer group carry out the acoustical signal of the different parts of automobile
Acquisition such as judges that rear-guard sound senses if the acoustical signal that rear-guard sonic transducer 111 detects is judged as abnormal acoustical signal by analysis
The sound intensity in 111 collected acoustical signal of device be more than preset value or acoustic pressure not within a preset range or frequency is not default
In range；Then it is carried out according to the time difference of 111 collected acoustical signal of rear-guard sonic transducer to being abnormal acoustical signal
Position is positioned, and the position of the abnormal acoustical signal then occurred according to positioning carries out judging whether the position needs to safeguard, such as
The gearbox that the position is rear wheel drive is accurately positioned and sends out abnormal acoustical signal, and judges the exception acoustical signal in preset range
It when interior, is then prompted without safeguarding, and then carries out maintenance prompting when more than preset range.
In the present embodiment, described " acquisition to be judged according to the Time-Frequency Information parameter of the acoustical signal of each sonic transducer acquisition
Acoustical signal it is whether abnormal, three-dimensional localization side is established according to the time difference for collecting abnormal acoustical signal if abnormal
Journey solves the sound source position for positioning abnormal acoustical signal " further include later：Record the Time-Frequency Information for the acoustical signal analyzed every time
Parameter, and preserve the characteristic fingerprint of each abnormal sound acoustical signal.By the way that the Time-Frequency Information of the collected acoustical signal of sonic transducer is joined
The characteristic fingerprint of several and each abnormal sound acoustical signal is stored, and further can accurately be compared according to the data of storage, can
Make the acoustic signal analysis and judge more acurrate that the later stage acquires sonic transducer.Wherein, described " to record the acoustical signal analyzed every time
Time-Frequency Information parameter, and preserve the characteristic fingerprint of each abnormal sound acoustical signal " further include step：According to the video information parameter of record
And the internal car noise situation of change of the characteristic fingerprint analysis automobile of each abnormal sound acoustical signal.
In the present embodiment, further include before described " passing through the acoustical signal of each sound sensing acquisition in sonic transducer group "
Step：The parameter and sample rate of each sonic transducer in sonic transducer group are configured.Sonic transducer acquisition sound is arranged to believe
Number Time-Frequency Information parameter within a preset range when, then to sonic transducer acquisition acoustical signal analyze or setting sound pass
The acquisition rate of sensor such as carries out being acquired acoustical signal by sonic transducer at interval of preset time, reduces the wasting of resources.
It should be noted that although the various embodiments described above have been described herein, it is not intended to limit
The scope of patent protection of the present invention.Therefore, based on the present invention innovative idea, to embodiment described herein carry out change and repair
Change, or using equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content, it directly or indirectly will be with
Upper technical solution is used in other related technical areas, is included within the scope of patent protection of the present invention.
Claims (10)
1. noise detection system in a kind of 8 road car, which is characterized in that set including sonic transducer group, data collecting card and computer
It is standby；
The sonic transducer group includes rear-guard sonic transducer, left back door sonic transducer, skylight sonic transducer, left front door sound sensing
Device, transmission shaft sonic transducer, engine sonic transducer, right-rear-door sonic transducer and right front door sonic transducer, the rear-guard sound pass
Sensor is arranged on the rear wheel drive of automobile, and the left back door sonic transducer is arranged on the left back door of automobile, the skylight sound
Sensor is arranged on the skylight of automobile, and the left front door sonic transducer is arranged on the left front door of automobile, the transmission shaft sound
Sensor is arranged on the transmission shaft of automobile, and the engine sonic transducer is arranged on the transmitter of automobile, the back door sound
Sensor is arranged on the right-rear-door of automobile, and the right front door sonic transducer is arranged on the right front door of automobile；
The sonic transducer group is connected to computer equipment by data collecting card；
The computer equipment includes sound data acquisition module, detection and analysis module, abnormal sound defect location module and identification of sound source
Module；
The sound data acquisition module is used for the acoustical signal by each sound sensing acquisition in sonic transducer group；
The detection and analysis module obtains the sound of each sound sensing acquisition for analyzing the collected acoustical signal of each sonic transducer
The Time-Frequency Information parameter of signal；
The Time-Frequency Information parameter judgement for the acoustical signal that the abnormal sound defect location module is used to be acquired according to each sonic transducer is adopted
Whether the acoustical signal of collection is abnormal, and three-dimensional localization side is established according to the time difference for collecting abnormal acoustical signal if abnormal
Journey solves the sound source position for positioning abnormal acoustical signal；
The identification of sound source module according to the sound source position for navigating to abnormal acoustical signal for judging whether to safeguard, if desired
Maintenance is then reminded.
2. noise detection system in 8 road car according to claim 1, which is characterized in that each of described sonic transducer group
Sonic transducer is connected to data collecting card by pre-processing amplifier respectively.
3. noise detection system in 8 road car according to claim 1, which is characterized in that the computer equipment is driving electricity
Brain.
4. noise detection system in 8 road car according to claim 1, which is characterized in that the computer equipment further includes number
According to management module, the data management module is used to record the Time-Frequency Information parameter for the acoustical signal analyzed every time, and preserves each
The characteristic fingerprint of abnormal sound acoustical signal.
5. noise detection system in 8 road car according to claim 4, which is characterized in that the computer equipment further includes becoming
Potential analysis module, the video information parameter and each Abnormal Sound that the trend analysis module is used to be recorded according to data management module
The internal car noise situation of change of the characteristic fingerprint analysis automobile of signal.
6. noise detection system in 8 road car according to claim 1, which is characterized in that the computer equipment further includes ginseng
Number setup module, the parameter setting module are used to carry out the parameter and sample rate of each sonic transducer in sonic transducer group
Setting.
7. noise measuring analysis method in a kind of 8 road car, which is characterized in that include the following steps：
Pass through the acoustical signal of each sound sensing acquisition in sonic transducer group；
The collected acoustical signal of each sonic transducer is analyzed, the Time-Frequency Information parameter of the acoustical signal of each sound sensing acquisition is obtained；
Judge whether the acoustical signal of acquisition is abnormal according to the Time-Frequency Information parameter of the acoustical signal of each sonic transducer acquisition, if not
The time difference that normal then basis collects abnormal acoustical signal establishes three-dimensional localization equation, solves and positions abnormal acoustical signal
Sound source position；
Judge whether to need to safeguard according to the sound source position for navigating to abnormal acoustical signal, if desired safeguards, reminded.
8. noise measuring analysis method in 8 road car according to claim 7, which is characterized in that described " to be sensed according to each sound
The Time-Frequency Information parameter of the acoustical signal of device acquisition judges whether the acoustical signal of acquisition is abnormal, and basis collects not if abnormal
The time difference of normal acoustical signal establishes three-dimensional localization equation, solves the sound source position for positioning abnormal acoustical signal " it goes back later
Including：
The Time-Frequency Information parameter for the acoustical signal analyzed every time is recorded, and preserves the characteristic fingerprint of each abnormal sound acoustical signal.
9. noise measuring analysis method in 8 road car according to claim 8, which is characterized in that described " record is analyzed every time
The Time-Frequency Information parameter of acoustical signal, and preserve the characteristic fingerprint of each abnormal sound acoustical signal " further include step：
The internal car noise that automobile is analyzed according to the characteristic fingerprint of the video information parameter of record and each abnormal sound acoustical signal changes feelings
Condition.
10. noise measuring analysis method in 8 road car according to claim 7, which is characterized in that described " to pass through sonic transducer
Further include step before the acoustical signal of each sound sensing acquisition in group "：
The parameter and sample rate of each sonic transducer in sonic transducer group are configured.
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| CN201810409442.XA CN108344504A (en) | 2018-05-02 | 2018-05-02 | Noise detection system and analysis method in 8 road car of one kind |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109580256A (en) * | 2019-01-07 | 2019-04-05 | 中汽研（常州）汽车工程研究院有限公司 | A kind of abnormal sound test method and frock clamp |
| CN111855229A (en) * | 2020-07-17 | 2020-10-30 | 中国汽车工程研究院股份有限公司 | Positioning evaluation analysis method for vehicle abnormal sound |
| CN112268614A (en) * | 2020-10-28 | 2021-01-26 | 深圳市泰祺科技有限公司 | Automobile monitoring method and system |
| CN114001972A (en) * | 2021-09-17 | 2022-02-01 | 东风汽车集团股份有限公司 | Method and device for positioning abnormal sound of automobile, electronic equipment and storage medium |
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