CN114878176A - Finished automobile sound insulation performance online evaluation method and system - Google Patents
Finished automobile sound insulation performance online evaluation method and system Download PDFInfo
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Abstract
The invention provides an on-line evaluation method for sound insulation performance of a whole vehicle, which comprises the steps of determining the current evaluation working condition and obtaining an in-vehicle noise signal obtained by a real sound source simulation test corresponding to the current evaluation working condition; obtaining the sound insulation performance score of the whole vehicle under the current evaluation working condition according to the obtained noise signal in the vehicle; and comparing the obtained finished automobile sound insulation performance score with a preset threshold value, and judging the finished automobile sound insulation performance qualification of the current evaluation working condition according to the comparison result. The method and the device are closer to the real situation for online evaluation, and have the advantages of more people for single evaluation, high efficiency, traceability, repeatability, no influence of external environment and the like.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a method and a system for evaluating the sound insulation performance of a whole automobile on line.
Background
The sound insulation performance of the automobile is an important evaluation index of the comfort of the automobile. In the development of the whole automobile, the automobile industry often evaluates the sound insulation performance of the whole automobile in a reverberation room and a sound-deadening room, or evaluates the sound insulation performance of the whole automobile on a social road when the automobile is driven. Wherein,
however, the above methods have disadvantages, which are: in the reverberation room and anechoic room evaluation method, the number of people who can be evaluated at a single time is small, the traceability is poor, the repeatability is not good, and the evaluation method is inconsistent with the daily experience working condition of an owner; in the social road evaluation method, the noise of the external environment is uncontrollable, and the evaluation efficiency is low.
Therefore, an online evaluation method for sound insulation performance of a finished automobile is needed, online evaluation is performed closer to the real situation, and the online evaluation method has the advantages of more people for single evaluation, high efficiency, traceability, repeatability, no influence of external environment and the like.
Disclosure of Invention
The technical problem to be solved by the embodiment of the invention is to provide the method and the system for the on-line evaluation of the sound insulation performance of the whole vehicle, the on-line evaluation is closer to the real situation, and the method and the system have the advantages of more people for single evaluation, high efficiency, traceability, repeatability, no influence of the external environment and the like.
In order to solve the technical problem, the embodiment of the invention provides an online evaluation method for sound insulation performance of a finished automobile, which comprises the following steps:
determining a current evaluation working condition, and acquiring an in-vehicle noise signal obtained by a real sound source simulation test corresponding to the current evaluation working condition;
obtaining the sound insulation performance score of the whole vehicle under the current evaluation working condition according to the obtained noise signal in the vehicle;
and comparing the obtained finished automobile sound insulation performance score with a preset threshold value, and judging the finished automobile sound insulation performance qualification of the current evaluation working condition according to the comparison result.
The current evaluation working condition is one of a vehicle whistle working condition, a large truck starting and passing working condition, a working condition that the vehicle enters a tunnel and an environmental noise working condition.
When the current evaluation working condition is a vehicle whistling working condition, the acquired in-vehicle noise signals are acquired by microphones arranged on the left ear and the right ear of a driver and the left ear and the right ear of a back-row passenger in the vehicle when the vehicle is still parked in a silencing room and a real acquired whistling sound source is played at a first preset position away from the vehicle.
When the current evaluation working condition is a large truck starting passing working condition, the acquired in-vehicle noise signals are acquired by microphones arranged on the left ear and the right ear of a driver and the left ear and the right ear of a rear passenger in the vehicle when the vehicle is still parked in the anechoic chamber and a really acquired large truck starting sound source is played at a second preset position away from the vehicle.
When the current evaluation working condition is that the vehicle enters the tunnel, the acquired in-vehicle noise signals are acquired by microphones arranged on the left ear and the right ear of a driver in the vehicle and the left ear and the right ear of a rear passenger in the vehicle when the vehicle is parked in the reverberation chamber and a really acquired out-vehicle sound source of the vehicle passes through the tunnel is played in the reverberation chamber.
When the current evaluation working condition is an environmental noise working condition, the acquired in-vehicle noise signals are acquired by microphones arranged on the left ear and the right ear of a driver and the left ear and the right ear of a rear passenger in the vehicle when the vehicle is still parked in the reverberation chamber and white noise is played in the reverberation chamber.
The method comprises the following steps of comparing the obtained finished automobile sound insulation performance score with a preset threshold value, and judging the finished automobile sound insulation performance qualification of the current evaluation working condition according to the comparison result, wherein the specific steps comprise:
if the obtained finished automobile sound insulation performance score is larger than or equal to the preset threshold value, judging that the finished automobile sound insulation performance of the current evaluation working condition is qualified;
and if the obtained finished automobile sound insulation performance score is smaller than the preset threshold value, judging that the finished automobile sound insulation performance of the current evaluation working condition is unqualified.
Wherein the method further comprises:
the method comprises the steps of obtaining in-vehicle noise signals of two vehicles under the same environmental noise working condition, obtaining whole vehicle sound insulation performance scores and whole vehicle sound insulation curves of the two vehicles under the same environmental noise working condition according to the obtained in-vehicle noise signals of the two vehicles under the same environmental noise working condition, filtering the obtained in-vehicle noise signals of the two vehicles under the same environmental noise working condition by adjusting the frequency range of a preset band-pass filter when the comparison result of the whole vehicle sound insulation performance scores of the two vehicles under the same environmental noise working condition is judged to be inconsistent with the comparison result of the whole vehicle sound insulation curves of the two vehicles under the same environmental noise working condition, obtaining the frequency range adopted by the band-pass filter when the comparison result of the whole vehicle sound insulation performance scores of the two vehicles is consistent with the comparison result of the whole vehicle sound insulation curves of the two vehicles, and further outputting the obtained frequency range as problem frequency.
Wherein the method further comprises:
and carrying out frequency segmentation on the noise signals in the two vehicles based on each obtained frequency range, obtaining the sound insulation performance scores of the whole vehicles in the corresponding segmentation of the two vehicles according to the noise signals in the two vehicles after frequency segmentation, further comparing the obtained sound insulation performance scores of the whole vehicles in the corresponding segmentation of the two vehicles with the preset threshold value, and judging the sound insulation performance qualification of the whole vehicles in the corresponding segmentation of the two vehicles under the same environmental noise working condition.
The embodiment of the invention also provides an on-line evaluation system for the sound insulation performance of the whole vehicle, which comprises a unit for acquiring the real simulated in-vehicle noise signal, a whole vehicle sound insulation performance grading unit and a whole vehicle sound insulation performance evaluation unit; wherein,
the unit for acquiring the real simulated in-vehicle noise signal is used for determining the current evaluation working condition and acquiring the in-vehicle noise signal obtained by the real sound source simulation test corresponding to the current evaluation working condition; the current evaluation working condition is one of a vehicle whistling working condition, a truck starting passing working condition, a vehicle tunnel entering working condition and an environmental noise working condition;
the finished automobile sound insulation performance grading unit is used for obtaining a finished automobile sound insulation performance grade of the current evaluation working condition according to the obtained in-automobile noise signal;
and the finished automobile sound insulation performance evaluation unit is used for comparing the obtained finished automobile sound insulation performance score with a preset threshold value and judging the finished automobile sound insulation performance qualification of the current evaluation working condition according to the comparison result.
Wherein, still include: a time domain filtering analysis problem frequency unit; wherein,
the time domain filtering analysis problem frequency unit is used for acquiring the in-car noise signals of two cars under the same environmental noise working condition, and according to the obtained in-vehicle noise signals of the two vehicles under the same environmental noise working condition, the finished vehicle sound insulation performance score and the finished vehicle sound insulation curve of the two vehicles under the same environmental noise working condition are obtained, when the grading comparison result of the sound insulation performance of the whole vehicle between the two vehicles is inconsistent with the comparison result of the sound insulation curve of the whole vehicle between the two vehicles under the same environmental noise working condition, and filtering the obtained in-vehicle noise signals of the two vehicles under the same environmental noise working condition by adjusting the frequency range of the preset band-pass filter, and further outputting the obtained frequency range as problem frequency when the grading comparison result of the sound insulation performance of the whole vehicle between the two vehicles is consistent with the comparison result of the sound insulation curve of the whole vehicle between the two vehicles.
The embodiment of the invention has the following beneficial effects:
1. the method is different from the problems that when the traditional evaluation method is applied to the environment noise working condition, the frequency spectrum characteristic of the noise in the automobile is different from the actual condition, the difference between the frequency spectrum characteristic and the actual condition is larger during playback, and the real feeling of an automobile owner cannot be restored;
2. according to the invention, the in-vehicle noise signals of two vehicles under the same environmental noise working condition are subjected to frequency segmentation analysis through time domain filtering, so that the evaluation of vehicle frequency division bands is realized, the relation with objective data is tighter, the problem frequency can be locked rapidly, an optimization scheme is provided pertinently, and the project development efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is within the scope of the present invention for those skilled in the art to obtain other drawings based on the drawings without inventive exercise.
FIG. 1 is a flow chart of a method for evaluating the sound insulation performance of a finished automobile on line according to an embodiment of the invention;
fig. 2 is a comparison diagram of a sound insulation curve of a whole vehicle formed by two vehicles under an environmental noise working condition in an application scenario of the method for evaluating the sound insulation performance of the whole vehicle on line provided by the embodiment of the invention; wherein a is a sample car 1; b is a sample vehicle 2;
fig. 3 is a schematic plan view of a parameter setting interface of a bandpass filter in an application scenario of the method for evaluating sound insulation performance of a finished vehicle on line according to the embodiment of the present invention;
fig. 4 is a schematic structural diagram of a system for online evaluation of sound insulation performance of a finished automobile according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, the method for online evaluation of sound insulation performance of a finished automobile provided in the embodiment of the present invention includes the following steps:
s1, determining the current evaluation working condition, and acquiring an in-vehicle noise signal obtained by a real sound source simulation test corresponding to the current evaluation working condition; the current evaluation working condition is one of a vehicle whistling working condition, a truck starting passing working condition, a vehicle tunnel entering working condition and an environmental noise working condition;
s2, obtaining the sound insulation performance score of the whole vehicle under the current evaluation working condition according to the obtained noise signal in the vehicle;
and S3, comparing the obtained sound insulation performance score of the whole vehicle with a preset threshold value, and judging the sound insulation performance qualification of the whole vehicle under the current evaluation working condition according to the comparison result.
The specific process is that before step S1, evaluation conditions are first set, specifically including a vehicle whistling condition, a truck starting passing condition, a vehicle tunnel entering condition, and an environmental noise condition. Then, sound source data of various evaluation working conditions commonly used for the sound insulation performance of the vehicle are collected and stored in a sound player, and the specifically collected data comprise collected vehicle exterior data of the vehicle whistling working conditions, collected vehicle exterior noise data when a large truck starts, tunnel exterior noise data (80km/h) and ambient noise data (such as white noise).
Secondly, the collected real sound source is subjected to simulation test in each evaluation working condition to obtain an in-vehicle noise signal, which specifically comprises the following steps:
(1) vehicle whistling operating mode: the noise signals in the vehicle are collected by microphones arranged on the left ear and the right ear of a driver in the vehicle and the left ear and the right ear of a back row passenger when the vehicle is parked in a silencing room and a real collected whistle sound source is played at a first preset position away from the vehicle.
In one embodiment, the vehicle is parked at a standstill in a sound-deadening room, a real collected whistle sound source (i.e., a simulated rear car whistle) is played at a first predetermined position (e.g., 3 meters from the center of the rear of the vehicle and 0.5 meter in height) from the vehicle, and the in-vehicle noise signals are collected by microphones disposed on the left and right ears of the driver and the left and right ears of the rear passenger in the vehicle.
(2) Starting of the large truck under the working condition: the noise signals in the vehicle are collected by microphones arranged on the left ear and the right ear of a driver in the vehicle and the left ear and the right ear of a back passenger when the vehicle is parked in a silencing room and a really collected starting sound source of a large truck is played at a second preset position away from the vehicle.
In one embodiment, the vehicle is parked at a standstill in a sound-deadening room, a real collected great truck starting sound source (i.e., simulating the passage of a great truck from the left and right lanes) is played at a second predetermined position (e.g., 1 meter in width and 1 meter in height) from the vehicle, and the in-vehicle noise signals are collected by microphones arranged on the left and right ears of the driver and the left and right ears of the rear passenger in the vehicle.
(3) The working condition that the vehicle enters the tunnel: the noise signal in the vehicle is collected by microphones arranged on the left ear and the right ear of a driver in the vehicle and the left ear and the right ear of a back passenger when the vehicle is parked in the reverberation chamber and the actually collected sound source outside the vehicle when the vehicle passes through the tunnel is played in the reverberation chamber.
In one embodiment, the vehicle is parked at rest in the reverberation chamber, and a truly collected vehicle-outside sound source through the tunnel is played in the reverberation chamber, and an in-vehicle noise signal is collected by in-vehicle driver left and right ear and rear passenger left and right ear arranged microphones.
(4) Environmental noise working condition: the noise signal in the vehicle is collected by microphones arranged on the left ear and the right ear of a driver in the vehicle and the left ear and the right ear of a rear passenger when the vehicle is parked in a reverberation room and white noise is played in the reverberation room.
In one embodiment, the vehicle is parked at rest in a reverberation room, white noise is played in the reverberation room, and the in-vehicle noise signal is collected by microphones arranged on the left and right ears of the driver and the left and right ears of the rear passenger in the vehicle.
Therefore, in step S1, after determining that the vehicle is in one of the whistling working condition, the starting and passing working condition of the truck, the working condition that the vehicle enters the tunnel, and the environmental noise working condition, the computer device imports the in-vehicle noise signal obtained by the real sound source simulation test corresponding to the current evaluation working condition.
In step S2, the in-vehicle noise signal obtained by the real sound source simulation test corresponding to the current evaluation condition is guided to a preset sound quality dedicated device for playback and scoring, so that the sound insulation performance score of the entire vehicle under the current evaluation condition can be obtained.
In one embodiment, the following ten examples in table 1 are used for playback scoring of noise signals in a vehicle under a vehicle whistling working condition to obtain a sound insulation performance score of the whole vehicle under the vehicle whistling working condition:
TABLE 1
In step S3, if the obtained sound insulation performance score of the entire vehicle is greater than or equal to a preset threshold (e.g., 6 scores), it is determined that the sound insulation performance of the entire vehicle under the current evaluation condition is qualified; otherwise, if the obtained finished automobile sound insulation performance score is smaller than a preset threshold (such as 6 points), judging that the finished automobile sound insulation performance of the current evaluation working condition is unqualified.
It can be understood that, referring to table 1 above, a plurality of different thresholds can be set for comparison, so as to further refine and analyze the sound insulation performance of the entire vehicle under each evaluation condition, and details are not repeated here.
In the embodiment of the invention, the sound insulation performance of different frequency bands can be evaluated through time domain filtering, the problem that the overall sound insulation of the vehicle is not subjective and objective is solved, and the specific frequency is conveniently focused to pertinently provide an optimization scheme. Accordingly, the method further comprises:
the method comprises the steps of obtaining in-vehicle noise signals of two vehicles under the same environmental noise working condition, obtaining whole vehicle sound insulation performance scores and whole vehicle sound insulation curves of the two vehicles under the same environmental noise working condition according to the obtained in-vehicle noise signals of the two vehicles under the same environmental noise working condition, filtering the obtained in-vehicle noise signals of the two vehicles under the same environmental noise working condition by adjusting the frequency range of a preset band-pass filter when the comparison result of the whole vehicle sound insulation performance scores of the two vehicles under the same environmental noise working condition is judged to be inconsistent with the comparison result of the whole vehicle sound insulation curves of the two vehicles under the same environmental noise working condition, obtaining the frequency range adopted by the band-pass filter when the comparison result of the whole vehicle sound insulation performance scores of the two vehicles is consistent with the comparison result of the whole vehicle sound insulation curves of the two vehicles, and further outputting the obtained frequency range as problem frequency.
In one embodiment, as shown in fig. 2 and 3, when the sample car 1 and the sample car 2 are subjected to the whole car sound insulation performance evaluation under the same environmental noise working condition in the reverberation room, the sample car 1 is evaluated as 6 points, the sample car 2 is evaluated as 6.5 points, and the whole car sound insulation of the sample car 2 is better than that of the sample car 1 in subjective perception; and secondly, when the sample car 1 and the sample car 2 are compared with the in-car noise signal obtained by the simulation test in the reverberation chamber, the sound insulation of the sample car 1 is inferior to that of the sample car 2 under 400Hz, but the sound insulation of the sample car 1 over 400Hz is obviously superior to that of the sample car 2, and the full-band average sound insulation is superior to that of the sample car 2.
Therefore, when the same environmental noise working condition exists, the grading comparison result of the sound insulation performance of the whole vehicle between the sample vehicle 1 and the sample vehicle 2 (if the sample vehicle 2 is superior to the sample vehicle 1) is inconsistent with the comparison result of the sound insulation curve of the whole vehicle between the sample vehicle 1 and the sample vehicle 2 (if the frequency of the noise signal in the vehicle is above 400Hz, the sample vehicle 1 is superior to the sample vehicle 2).
Therefore, the in-vehicle noise signals of the sample vehicle 1 and the sample vehicle 2 can be filtered by adjusting the frequency range of the preset band-pass filter to be 160-350Hz, and the whole vehicle sound insulation sample vehicle 1 in the frequency range is about 3dB different from the sample vehicle 2, so that the grading comparison result of the sound insulation performance of the whole vehicle between the two vehicles (if the sample vehicle 2 is better than the sample vehicle 1) is consistent with the comparison result of the sound insulation curve of the whole vehicle between the two vehicles (if the sample vehicle 2 is better than the sample vehicle 1), namely, the subjective and objective performances are consistent, at the moment, an engineer can quickly lock the problem frequency based on the method and pertinently provide an optimization scheme, thereby improving the project development efficiency.
In the embodiment of the invention, the sound insulation performance of different frequency bands is further evaluated through time domain filtering, so that the evaluation of vehicle frequency bands is realized, and the relation with objective data is tighter. Accordingly, the method further comprises:
and carrying out frequency segmentation on the noise signals in the two vehicles based on each obtained frequency range, obtaining the sound insulation performance scores of the whole vehicles in the corresponding segmentation of the two vehicles according to the noise signals in the two vehicles after frequency segmentation, further comparing the obtained sound insulation performance scores of the whole vehicles in the corresponding segmentation of the two vehicles with the preset threshold value, and judging the sound insulation performance qualification of the whole vehicles in the corresponding segmentation of the two vehicles under the same environmental noise working condition.
In an embodiment, in fig. 2 and fig. 3, the in-vehicle noise signals of the sample car 1 and the sample car 2 are respectively subjected to frequency segmentation based on the problem frequency, and then the in-vehicle noise signals after the frequency segmentation are analyzed to obtain the finished vehicle sound insulation performance qualification results of the corresponding segments of the two cars, so that the evaluation of the vehicle frequency division is realized.
As shown in fig. 4, in the embodiment of the present invention, the proposed system for on-line evaluating sound insulation performance of a finished automobile includes a unit 110 for obtaining a real simulated in-car noise signal, a unit 120 for scoring sound insulation performance of the finished automobile, and a unit 130 for evaluating sound insulation performance of the finished automobile; wherein,
the unit for obtaining a real simulated in-vehicle noise signal 110 is configured to determine a current evaluation condition and obtain an in-vehicle noise signal obtained through a real sound source simulation test corresponding to the current evaluation condition; the current evaluation working condition is one of a vehicle whistling working condition, a truck starting passing working condition, a vehicle tunnel entering working condition and an environmental noise working condition;
the finished automobile sound insulation performance grading unit 120 is used for obtaining a finished automobile sound insulation performance grade of the current evaluation working condition according to the obtained in-automobile noise signal;
and the finished automobile sound insulation performance evaluation unit 130 is used for comparing the obtained finished automobile sound insulation performance score with a preset threshold value and judging the finished automobile sound insulation performance qualification of the current evaluation working condition according to the comparison result.
When the current evaluation working condition is a vehicle whistling working condition, the acquired in-vehicle noise signals are acquired by microphones arranged on the left ear and the right ear of a driver and the left ear and the right ear of a rear passenger in the vehicle when the vehicle is still parked in a silencing room and a really acquired whistling sound source is played at a first preset position away from the vehicle; or
When the current evaluation working condition is a large truck starting passing working condition, the acquired in-vehicle noise signals are acquired by microphones arranged on the left ear and the right ear of a driver and the left ear and the right ear of a rear passenger in the vehicle when the vehicle is still parked in a silencing room and a really acquired large truck starting sound source is played at a second preset position away from the vehicle; or
When the current evaluation working condition is that the vehicle enters the tunnel, the acquired in-vehicle noise signals are acquired by microphones arranged on the left ear and the right ear of a driver in the vehicle and the left ear and the right ear of a rear passenger when the vehicle is still parked in the reverberation chamber and the actually acquired out-vehicle sound source of the vehicle passing through the tunnel is played in the reverberation chamber; or
When the current evaluation working condition is an environmental noise working condition, the acquired in-vehicle noise signals are acquired by microphones arranged on the left ear and the right ear of a driver and the left ear and the right ear of a rear passenger in the vehicle when the vehicle is still parked in the reverberation chamber and white noise is played in the reverberation chamber.
Wherein, still include: a time domain filtering analysis problem frequency unit; wherein,
the time domain filtering analysis problem frequency unit is used for acquiring the in-car noise signals of two cars under the same environmental noise working condition, and according to the obtained in-vehicle noise signals of the two vehicles under the same environmental noise working condition, the finished vehicle sound insulation performance score and the finished vehicle sound insulation curve of the two vehicles under the same environmental noise working condition are obtained, when the grading comparison result of the sound insulation performance of the whole vehicle between the two vehicles is inconsistent with the comparison result of the sound insulation curve of the whole vehicle between the two vehicles under the same environmental noise working condition, and filtering the obtained in-vehicle noise signals of the two vehicles under the same environmental noise working condition by adjusting the frequency range of the preset band-pass filter, and further outputting the obtained frequency range as problem frequency when the grading comparison result of the sound insulation performance of the whole vehicle between the two vehicles is consistent with the comparison result of the sound insulation curve of the whole vehicle between the two vehicles.
The embodiment of the invention has the following beneficial effects:
1. different from the problems that when the traditional evaluation method is applied to the environment noise working condition, the frequency spectrum characteristic of the noise in the vehicle is different from the actual condition, the difference between the frequency spectrum characteristic and the actual working condition is larger during playback, and the real feeling of a vehicle owner cannot be restored, the noise signals in the vehicle of each evaluation working condition (such as a vehicle whistling working condition, a truck starting passing working condition, a working condition that the vehicle enters a tunnel and an environment noise working condition) are obtained from a real sound source simulation test, so that the online evaluation method is closer to the real condition for online evaluation, and has the advantages of more people number for single evaluation, high efficiency, traceability, repeatability, no influence of the external environment and the like;
2. according to the invention, the in-vehicle noise signals of two vehicles under the same environmental noise working condition are subjected to frequency segmentation analysis through time domain filtering, so that the evaluation of vehicle frequency division bands is realized, the relation with objective data is tighter, the problem frequency can be locked rapidly, an optimization scheme is provided pertinently, and the project development efficiency is improved.
It should be noted that, in the foregoing system embodiment, each included system unit is only divided according to functional logic, but is not limited to the above division as long as the corresponding function can be implemented; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
It will be understood by those skilled in the art that all or part of the steps in the method for implementing the above embodiments may be implemented by relevant hardware instructed by a program, and the program may be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (10)
1. The method for evaluating the sound insulation performance of the whole vehicle on line is characterized by comprising the following steps:
determining a current evaluation working condition, and acquiring an in-vehicle noise signal obtained by a real sound source simulation test corresponding to the current evaluation working condition;
obtaining the sound insulation performance score of the whole vehicle under the current evaluation working condition according to the obtained noise signal in the vehicle;
and comparing the obtained finished automobile sound insulation performance score with a preset threshold value, and judging the finished automobile sound insulation performance qualification of the current evaluation working condition according to the comparison result.
2. The method for online evaluation of the sound insulation performance of the whole vehicle according to claim 1, wherein the current evaluation working condition is one of a vehicle whistling working condition, a large truck starting passing working condition, a vehicle tunnel entering working condition and an environmental noise working condition.
3. The on-line evaluation method for the sound insulation performance of the whole vehicle as claimed in claim 2, wherein when the current evaluation working condition is a vehicle whistling working condition, the acquired in-vehicle noise signals are acquired by microphones arranged on left and right ears of a driver and left and right ears of a rear passenger in the vehicle when the vehicle is parked in a sound-deadening room and a really acquired whistling sound source is played at a first preset position away from the vehicle.
4. The on-line evaluation method for the sound insulation performance of the whole vehicle as claimed in claim 2, wherein when the current evaluation working condition is a starting passing working condition of the large truck, the obtained in-vehicle noise signals are acquired by microphones arranged on left and right ears of a driver and left and right ears of a rear passenger in the vehicle when the vehicle is still parked in a sound-deadening chamber and a really acquired starting sound source of the large truck is played at a second preset position away from the vehicle.
5. The on-line evaluation method for the sound insulation performance of the whole vehicle as claimed in claim 2, wherein when the current evaluation working condition is a working condition that the vehicle enters a tunnel, the acquired noise signals in the vehicle are acquired by microphones arranged on the left ear and the right ear of a driver in the vehicle and the left ear and the right ear of a back-row passenger when the vehicle is still parked in the reverberation chamber and the actually acquired sound source outside the vehicle passing the tunnel is played in the reverberation chamber.
6. The on-line evaluation method for the sound insulation performance of the whole vehicle as claimed in claim 2, wherein when the current evaluation working condition is an ambient noise working condition, the obtained noise signal in the vehicle is collected by microphones arranged on the left ear and the right ear of a driver and the left ear and the right ear of a back passenger in the vehicle when the vehicle is still parked in the reverberation room and white noise is played in the reverberation room.
7. The method for evaluating the sound insulation performance of a whole vehicle according to claim 1, characterized by further comprising the following steps:
the method comprises the steps of obtaining in-vehicle noise signals of two vehicles under the same environmental noise working condition, obtaining whole vehicle sound insulation performance scores and whole vehicle sound insulation curves of the two vehicles under the same environmental noise working condition according to the obtained in-vehicle noise signals of the two vehicles under the same environmental noise working condition, filtering the obtained in-vehicle noise signals of the two vehicles under the same environmental noise working condition by adjusting the frequency range of a preset band-pass filter when the comparison result of the whole vehicle sound insulation performance scores of the two vehicles under the same environmental noise working condition is judged to be inconsistent with the comparison result of the whole vehicle sound insulation curves of the two vehicles under the same environmental noise working condition, obtaining the frequency range adopted by the band-pass filter when the comparison result of the whole vehicle sound insulation performance scores of the two vehicles is consistent with the comparison result of the whole vehicle sound insulation curves of the two vehicles, and further outputting the obtained frequency range as problem frequency.
8. The method for evaluating the sound insulation performance of a whole vehicle according to claim 7, further comprising the following steps:
and carrying out frequency segmentation on the noise signals in the two vehicles based on each obtained frequency range, obtaining the sound insulation performance scores of the whole vehicles in the corresponding segmentation of the two vehicles according to the noise signals in the two vehicles after frequency segmentation, further comparing the obtained sound insulation performance scores of the whole vehicles in the corresponding segmentation of the two vehicles with the preset threshold value, and judging the sound insulation performance qualification of the whole vehicles in the corresponding segmentation of the two vehicles under the same environmental noise working condition.
9. The finished automobile sound insulation performance online evaluation system is characterized by comprising a unit for acquiring a real simulated in-automobile noise signal, a finished automobile sound insulation performance grading unit and a finished automobile sound insulation performance evaluation unit; wherein,
the unit for acquiring the real simulated in-vehicle noise signal is used for determining the current evaluation working condition and acquiring the in-vehicle noise signal obtained by the real sound source simulation test corresponding to the current evaluation working condition; the current evaluation working condition is one of a vehicle whistling working condition, a truck starting passing working condition, a vehicle tunnel entering working condition and an environmental noise working condition;
the finished automobile sound insulation performance grading unit is used for obtaining a finished automobile sound insulation performance grade of the current evaluation working condition according to the obtained in-automobile noise signal;
and the finished automobile sound insulation performance evaluation unit is used for comparing the obtained finished automobile sound insulation performance score with a preset threshold value and judging the finished automobile sound insulation performance qualification of the current evaluation working condition according to the comparison result.
10. The finished automobile sound insulation performance online evaluation system of claim 9, further comprising: a time domain filtering analysis problem frequency unit; wherein,
the time domain filtering analysis problem frequency unit is used for acquiring the in-car noise signals of two cars under the same environmental noise working condition, and according to the obtained in-vehicle noise signals of the two vehicles under the same environmental noise working condition, the finished vehicle sound insulation performance score and the finished vehicle sound insulation curve of the two vehicles under the same environmental noise working condition are obtained, when the grading comparison result of the sound insulation performance of the whole vehicle between the two vehicles is inconsistent with the comparison result of the sound insulation curve of the whole vehicle between the two vehicles under the same environmental noise working condition, and filtering the obtained in-vehicle noise signals of the two vehicles under the same environmental noise working condition by adjusting the frequency range of the preset band-pass filter, and further outputting the obtained frequency range as problem frequency when the grading comparison result of the sound insulation performance of the whole vehicle between the two vehicles is consistent with the comparison result of the sound insulation curve of the whole vehicle between the two vehicles.
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