CN116025544A - Method, system and equipment for reducing working noise of in-vehicle compressor - Google Patents
Method, system and equipment for reducing working noise of in-vehicle compressor Download PDFInfo
- Publication number
- CN116025544A CN116025544A CN202310302034.5A CN202310302034A CN116025544A CN 116025544 A CN116025544 A CN 116025544A CN 202310302034 A CN202310302034 A CN 202310302034A CN 116025544 A CN116025544 A CN 116025544A
- Authority
- CN
- China
- Prior art keywords
- compressor
- vehicle
- sound pressure
- under
- preset
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention provides a method, a system and equipment for reducing working noise of an in-vehicle compressor, wherein the method comprises the following steps: under a preset condition, acquiring vehicle information, and obtaining theoretical working frequency of a compressor under corresponding working conditions according to the vehicle information through a preset formula; controlling a sensor arranged on the vehicle to collect sound information under the corresponding working condition of the compressor, and performing spectrum analysis on the sound information; obtaining a first sound pressure contribution quantity in a vehicle under the corresponding working condition of the compressor according to the theoretical working frequency and the spectrum analysis result; comparing the first sound pressure contribution amount with a preset sound pressure contribution amount; and if the first sound pressure contribution is larger than the preset sound pressure contribution, determining design parameters of the Helmholtz silencer according to the theoretical working frequency and the vehicle information through preset rules. The invention solves the problem that a method for reducing noise of the compressor is lacked in the prior art.
Description
Technical Field
The invention relates to the technical field of automobile noise reduction, in particular to a method, a system and equipment for reducing working noise of an in-car compressor.
Background
With the development of economy and science, people have higher requirements on the riding comfort of automobiles. Particularly in hot summer, the air conditioning and refrigerating operation is a function which can be selected by all vehicle owners. However, compared with the normal driving working condition, after the air conditioner is started under the idle working condition, the working noise of the compressor is particularly prominent, and the comfort experience of passengers in the vehicle is greatly influenced. Noise is also an important factor affecting passenger riding comfort.
The existing automobile noise detection method and noise reduction method generally detect the whole automobile, so as to analyze and reduce the noise generated by the whole automobile. However, the method lacks pertinence, cannot detect and improve pertinence to noise generated by a compressor during air conditioner refrigeration under idle working conditions, and only can improve the whole of the automobile for reducing the whole noise of the automobile, so that the method has high cost.
Disclosure of Invention
Based on the above, the invention aims to provide a method, a system and equipment for reducing the working noise of an in-car compressor, which aims to solve the problem that a method for reducing the noise of the compressor is lacked in the prior art.
According to the embodiment of the invention, the method for reducing the working noise of the in-vehicle compressor comprises the following steps:
under a preset condition, acquiring vehicle information, and obtaining theoretical working frequency of a compressor under corresponding working conditions according to the vehicle information through a preset formula;
controlling a sensor arranged on the vehicle to collect sound information under the corresponding working condition of the compressor, and performing spectrum analysis on the sound information;
obtaining a first sound pressure contribution quantity in a vehicle under the corresponding working condition of the compressor according to the theoretical working frequency and the spectrum analysis result;
comparing the first sound pressure contribution amount with a preset sound pressure contribution amount;
and if the first sound pressure contribution amount is larger than the preset sound pressure contribution amount, determining design parameters of the Helmholtz silencer according to the theoretical working frequency and the vehicle information through preset rules so as to reduce noise of the in-vehicle compressor through the Helmholtz silencer.
In addition, the method for reducing the working noise of the in-vehicle compressor according to the embodiment of the invention may further have the following additional technical features:
further, the preset conditions and the vehicle information include:
the vehicle information comprises the rotation speed ratio of the compressor to the engine, the rotation speed of the engine under the corresponding working condition, the number of the compressors and the pipe diameters of a high-pressure pipe and a low-pressure pipe of the compressor;
the preset conditions comprise that the communication system, the navigation system, the wiper and the heating system in the vehicle are in a closed state, the vehicle door window, the skylight and the skylight cover plate are in a closed state, the seat is positioned at a horizontal and vertical middle position, and the middle position is 45 degrees clockwise.
Further, the preset formula is:
f is the theoretical working frequency, X is the rotation speed ratio of the compressor to the engine, N is the rotation speed of the engine under the corresponding working condition, and Y is the number of the compressors.
Further, the preset rule includes:
where f is the frequency of desired muffling, V is muffler volume,
the length of the connecting pipeline is Sc, the sectional area of the connecting pipeline, D, the sectional diameter of the connecting pipeline and c, the sound velocity.
Further, the sound pressure sensor is disposed at the upper left side of the compressor and at the left ear of the main frame in the vehicle, and the step of obtaining the first sound pressure contribution of the compressor in the vehicle under the corresponding working condition according to the theoretical working frequency and the result of the spectrum analysis includes:
according to the spectrum analysis result, obtaining theoretical sound pressure contribution values measured by the two sound pressure sensors under the theoretical working frequency and corresponding sound pressure contribution values measured by the two sound pressure sensors under all frequencies within the positive and negative 50HZ range of the theoretical working frequency;
judging whether the two theoretical sound pressure contribution values are respectively larger than all corresponding sound pressure contribution values of the corresponding sensor;
if so, the theoretical sound pressure contribution value measured by the compressor sensor is the first sound pressure contribution value;
and if not, returning to the step of executing the theoretical working frequency under the corresponding working condition of the compressor by the preset formula according to the vehicle information obtained under the preset condition.
Further, the compressor body is further provided with a vibration sensor, and the step of collecting the sound information of the sensor position point under the corresponding working condition of the compressor and performing spectrum analysis on the sound information is preceded by the steps of;
obtaining the vibration sensor data to obtain the actual working frequency of the compressor,
judging whether the absolute value of the difference between the actual working frequency and the theoretical working frequency is larger than 5HZ;
if not, executing the step of collecting the sound information of the sensor position points under the corresponding working condition of the compressor and carrying out spectrum analysis on the sound information;
if yes, replacing the value of the theoretical working frequency with the value of the actual working frequency, executing the steps of collecting the sound information of the sensor position point under the corresponding working condition of the compressor, and carrying out spectrum analysis on the sound information.
Further, the method further comprises:
and after the Helmholtz silencer is installed, the second sound pressure contribution of the compressor in the vehicle under the corresponding working condition is obtained, and the second sound pressure contribution is compared with a preset sound pressure contribution.
Another object of the present invention is to provide a system for reducing the operating noise of an in-vehicle compressor, the system comprising:
the theoretical working frequency calculation module is used for acquiring vehicle information under a preset condition and obtaining theoretical working frequency of the compressor under corresponding working conditions through a preset formula according to the vehicle information;
the frequency spectrum analysis module is used for controlling a sensor arranged on the vehicle to acquire sound information under the corresponding working condition of the compressor and carrying out frequency spectrum analysis on the sound information;
the analysis module is used for obtaining a first sound pressure contribution quantity in the vehicle under the corresponding working condition of the compressor according to the theoretical working frequency and the frequency spectrum analysis result;
the judging module is used for comparing the first sound pressure contribution quantity with a preset sound pressure contribution quantity;
and the design parameter acquisition module is used for determining design parameters of the Helmholtz silencer according to the theoretical working frequency and the vehicle information through a preset rule if the first sound pressure contribution is larger than the preset sound pressure contribution so as to reduce noise of the in-vehicle compressor through the Helmholtz silencer.
It is another object of an embodiment of the present invention to provide a storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method of reducing operating noise of an in-vehicle compressor described above.
It is another object of an embodiment of the present invention to provide an apparatus comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method for reducing the operating noise of a compressor in a vehicle described above when the program is executed.
According to the invention, the sensors are arranged at the compressor and the cab in the vehicle, noise data generated by the compressor during air conditioning refrigeration under an idle working condition are detected, the data are converted into chart information through frequency spectrum analysis, the theoretical working frequency of the compressor is obtained according to the vehicle information and a preset formula, the theoretical working frequency is brought into the chart information, the sound pressure contribution quantity detected by the sensors under the frequency can be obtained, namely the sound pressure contribution quantity generated by the compressor, wherein the sound pressure contribution quantity detected by the sensors in the cab is the first sound pressure contribution quantity, if the first sound pressure contribution quantity exceeds the preset sound pressure contribution quantity, the noise generated by the compressor is overlarge, the helmz muffler is designed according to the vehicle information and the theoretical working frequency of the compressor through a preset rule, the noise of the compressor to the cab is further reduced, after the helmz muffler is installed, the sound pressure contribution quantity of the compressor is detected and analyzed through the sensors again, the preset contribution quantity of the compressor in the cab can be obviously reduced, and the noise reduction requirement is obviously met. The noise of the compressor is detected and improved according to specific working conditions, compared with the noise detection method of the whole automobile, the noise reduction method is simpler, noise reduction measures are simpler and more convenient, and only the corresponding Helmholtz silencer is required to be arranged at a preset position without changing the structure of the automobile, so that the cost is greatly reduced.
Drawings
FIG. 1 is a flow chart of a method of reducing the operating noise of an in-vehicle compressor in a first embodiment of the invention;
FIG. 2 is a schematic diagram showing the results of a system for reducing the noise of operation of an in-vehicle compressor in accordance with a second embodiment of the present invention;
FIG. 3 is a schematic view of the apparatus in a third embodiment of the present invention;
the invention will be further described in the following detailed description in conjunction with the above-described figures.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Several embodiments of the invention are presented in the figures. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "mounted" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Example 1
Referring to fig. 1, a method for reducing noise in an in-vehicle compressor according to a first embodiment of the present invention is shown, and the method specifically includes steps S01-S05.
Step S01, acquiring vehicle information under a preset condition, and obtaining theoretical working frequency of a compressor under a corresponding working condition through a preset formula according to the vehicle information;
the preset conditions and the vehicle information include: acquiring vehicle equipment information, wherein the rotation speed ratio of the compressor to the engine, the rotation speed of the engine under corresponding working conditions, the number of the compressors and the pipe diameters of a high-pressure pipe and a low-pressure pipe of the compressor; the preset conditions comprise that the communication, navigation system, wiper and heating system in the vehicle are in a closed state, and the vehicle door, the vehicle door and window, the skylight and the skylight cover plate are in a closed state; acquiring seat position information, wherein the seat is positioned at a horizontal middle position and a vertical middle position, and the middle position is 45 degrees clockwise; and acquiring position point information of a sensor in the vehicle, wherein a sound pressure sensor and a vibration sensor are arranged at the left upper part of the compressor and the left ear of the main driver in the vehicle, and the compressor body.
In specific implementation, the vehicle information is obtained for the purpose of calculating the theoretical working frequency of the compressor, and the sound pressure contribution quantity of the corresponding frequency after the spectrum analysis is checked according to the theoretical working frequency of the compressor; the preset conditions are set to exclude other variables, so that detection is more accurate; the seat position information is acquired in order to detect the sound pressure contribution amount of the compressor in the cabin in the normal driving state of the driver.
Further, the in-vehicle sensor position point information is acquired in order to determine that the sensor position is set correctly, and to collect detection data of the sensor. The sound pressure sensor is arranged at the left ear of the main driver in the automobile because the compressor is close to the left ear of the driver, and the noise is larger; the vibration sensor is arranged on the compressor body to detect the working frequency of the compressor in actual working.
Further, in the implementation, the preset formula is:
f is the theoretical working frequency, X is the rotation speed ratio of the compressor to the engine, N is the rotation speed of the engine under the corresponding working condition, and Y is the number of the compressors. Specifically, when the idle engine speed of the test vehicle is 800rpm, the compressor speed ratio is 1.46, and the number of the cylinders of the vehicle type compressor is 10 cylinders, so that the theoretical working frequency of the compressor can be 194Hz. When the theoretical working frequency of the compressor is 194Hz, the front and back of the Helmholtz silencer are setAfter the Helmholtz muffler is arranged, the data detected by each sensor under the corresponding working condition are subjected to spectrum analysis to obtain chart data, wherein the sound pressure contribution of the compressor in the vehicle before the muffler is arranged is 45.12dB (A), is larger than the preset sound pressure contribution of 35dB (A), and the sound pressure contribution of the compressor in the vehicle after the muffler is arranged is 34.82dB (A), so that the requirements are met.
Step S02, controlling a sensor arranged on the vehicle to collect sound information under the corresponding working condition of the compressor, and carrying out spectrum analysis on the sound information;
specifically, the spectrum analysis is a method of converting a time domain signal into a frequency domain signal through fourier transformation, by the method, the amplitude and the phase generated by different frequencies can be obtained, and the frequency of sound generated by different devices is specific, so that the theoretical working frequency of the compressor is obtained, and then the sound pressure contribution value generated by the compressor can be directly found by comparing the graphs of the spectrum analysis.
In addition, before this step, the vibration sensor data is acquired to obtain the actual working frequency of the compressor, and it is determined whether the absolute value of the difference between the actual working frequency and the theoretical working frequency is greater than 5HZ; if not, executing the step of collecting the sound information of the sensor position points under the corresponding working condition of the compressor and carrying out spectrum analysis on the sound information; if yes, replacing the value of the theoretical working frequency with the value of the actual working frequency, executing the steps of collecting the sound information of the sensor position point under the corresponding working condition of the compressor, and carrying out spectrum analysis on the sound information. When the theoretical working frequency and the actual working frequency are too far different, the value of the actual working frequency should be replaced with the value of the theoretical working frequency in the subsequent step to ensure that the detection and analysis data are correct. This occurs because the compressors are produced in the same process lot, but sometimes there is an excessive noise variance that does not affect other operating efficiencies of the compressors and is not detected during the compressor production, thus requiring attention in reducing the compressor process at this time. If the theoretical operating frequency and the actual operating frequency differ little, the theoretical operating frequency is used for carrying out subsequent step operation, and the difference between the theoretical operating frequency and the actual operating frequency is the detected measurement error.
Step S03, obtaining a first sound pressure contribution quantity in the vehicle under the corresponding working condition of the compressor according to the theoretical working frequency and the spectrum analysis result;
specifically, the step of obtaining the first sound pressure contribution amount in the vehicle under the corresponding working condition of the compressor according to the theoretical working frequency and the result of the spectrum analysis includes: according to the spectrum analysis result, obtaining theoretical sound pressure contribution values measured by the compressor and the main left ear sensor at the theoretical working frequency and corresponding sound pressure contribution values measured by the compressor and the main left ear sensor at all frequencies within a range of plus or minus 50HZ of the theoretical working frequency, wherein in addition, when the theoretical working frequency is less than 50HZ, the spectrum analysis selects corresponding sound pressure contribution values measured by the compressor and the main left ear sensor at all frequencies within a range of 0HZ to 100 HZ; judging whether the theoretical sound pressure contribution value is larger than all the corresponding sound pressure contribution values; if so, the theoretical sound pressure contribution value measured by the compressor sensor is the first sound pressure contribution value; and if not, returning to the step of executing the theoretical working frequency under the corresponding working condition of the compressor by the preset formula according to the vehicle information obtained under the preset condition. After the spectrum analysis data are obtained, the spectrum analysis data are needed to be screened through the theoretical working frequency, the spectrum analysis data in a certain range near the theoretical working frequency are selected, and the data in a positive and negative 200Hz range near the theoretical working frequency are generally selected; the sound pressure contribution quantity under the theoretical working frequency is obtained according to the theoretical working frequency, and the vehicle equipment information and the equipment working condition are limited, so that the main sound pressure contribution quantity in the cab is required to come from a compressor, namely, the sound pressure contribution quantity corresponding to the theoretical working frequency is required to be larger than the corresponding sound pressure contribution value measured by the compressor and the sensor at the left ear of the main driver under all frequencies within the positive and negative 50HZ range of the theoretical working frequency; if the sound pressure contribution corresponding to the theoretical work evaluation rate is not the regional peak value, the problem occurs in the previous step, the parameter is required to be reset to zero, and the calculation is carried out again according to the step.
Step S04, comparing the first sound pressure contribution amount with a preset sound pressure contribution amount;
in the specific implementation, before the noise reduction design is carried out on the compressors of all vehicles, the noise generated by compression and addition is required to be compared with the preset noise, and if the noise is smaller than the preset noise, the noise reduction is not required, because the noise amount at the moment cannot influence a driver to generate discomfort.
Step S05, if the first sound pressure contribution is larger than the preset sound pressure contribution, determining design parameters of a Helmholtz silencer according to the theoretical working frequency and the vehicle information through preset rules so as to reduce noise of an in-vehicle compressor through the Helmholtz silencer;
in specific implementation, the preset rule is as follows:
where f is the frequency of desired muffling, i.e., the theoretical operating frequency of the compressor, and V is the muffler volume (m 3 ），
The length of the connecting pipeline is Sc, the sectional area of the connecting pipeline, D, the sectional diameter of the connecting pipeline and c, the sound velocity is 346m/s. In the case of a specific implementation of the present invention, f, sc, D, c are obtained by vehicle information and calculation, so V, < >>
Corresponding parameter adjustment is carried out according to the arrangement position and the installation condition of the muffler, so that the two parameters meet the formula and the actual installation condition on site.
After the above steps, the method further comprises: and after the Helmholtz muffler is installed, the second sound pressure contribution of the compressor in the vehicle under the corresponding working condition is obtained, and the second sound pressure contribution is compared with the preset sound pressure contribution.
Specifically, detection comparison is needed again after the muffler is installed, so that the noise contribution of the compressor is reduced to a required target, and the accuracy of the noise reduction method is further ensured.
In summary, in the method for reducing the working noise of the in-vehicle compressor according to the embodiment of the invention, by arranging the sensors at the compressor and the cab in the vehicle, detecting noise data generated by the compressor when air conditioning is performed under idle working conditions, converting the noise data into chart information through frequency spectrum analysis, obtaining theoretical working frequency of the compressor according to the vehicle information and a preset formula, bringing the theoretical working frequency into the chart information, obtaining the sound pressure contribution amount detected by the sensor under the frequency, namely the sound pressure contribution amount generated by the compressor, wherein the sound pressure contribution amount detected by the sensor in the cab is the first sound pressure contribution amount, if the first sound pressure contribution amount exceeds the preset sound pressure contribution amount, designing the Helmholtz silencer according to the vehicle information and the theoretical working frequency of the compressor, mounting the Helmholtz silencer on a transmission path between the compressor and the cab, further reducing the noise of the compressor to the cab, detecting and analyzing the sound pressure contribution amount detected by the sensor again after the Helmholtz silencer is mounted, and the sound pressure contribution amount is obviously reduced after the Helmholtz silencer is mounted in the cab, if the first sound pressure contribution amount exceeds the preset sound pressure contribution amount, and the noise reduction requirement is obviously reduced. The noise of the compressor is detected and improved according to specific working conditions, compared with the noise detection method of the whole automobile, the noise reduction method is simpler, noise reduction measures are simpler and more convenient, and only the corresponding Helmholtz silencer is required to be arranged at a preset position without changing the structure of the automobile, so that the cost is greatly reduced.
Example two
Referring to fig. 2, a block diagram of a system for reducing noise in an in-vehicle compressor according to a second embodiment of the present invention is shown, where the system 200 for reducing noise in an in-vehicle compressor includes: a theoretical operating frequency calculation module 21, a spectrum analysis module 22, an analysis module 23, a judgment module 24, and a design parameter acquisition module 25, wherein:
the theoretical working frequency calculation module 21 is configured to obtain vehicle information under a preset condition, and obtain a theoretical working frequency of the compressor under a corresponding working condition according to a preset formula according to the vehicle information;
the spectrum analysis module 22 is used for controlling a sensor arranged on the vehicle to collect sound information under the corresponding working condition of the compressor and performing spectrum analysis on the sound information;
the analysis module 23 is configured to obtain a first sound pressure contribution amount in the vehicle under the corresponding working condition of the compressor according to the theoretical working frequency and the result of the spectrum analysis;
a judging module 24, configured to compare the first sound pressure contribution to a preset sound pressure contribution;
and the design parameter obtaining module 25 is configured to design a corresponding helmholtz silencer according to the theoretical operating frequency and the vehicle information through a preset rule if the first sound pressure contribution is greater than the preset sound pressure contribution.
Further, the analysis module 23 includes:
the collection unit is used for acquiring theoretical sound pressure contribution values measured by the two sound pressure sensors under the theoretical working frequency and corresponding sound pressure contribution values measured by the two sound pressure sensors under all frequencies within the positive and negative 50HZ range of the theoretical working frequency according to the frequency spectrum analysis result;
the judging unit is used for judging whether the two theoretical sound pressure contribution values are respectively larger than all the corresponding sound pressure contribution values corresponding to the sensor; if so, the theoretical sound pressure contribution value measured by the compressor sensor is the first sound pressure contribution value; and if not, executing the steps of acquiring the vehicle information and the sensor position point in the vehicle.
Further, the system 200 for reducing the working noise of the in-vehicle compressor further includes:
and the verification module is used for acquiring a second sound pressure contribution of the compressor in the vehicle under the corresponding working condition after the Helmholtz silencer is installed, and comparing the second sound pressure contribution with a preset sound pressure contribution.
Further, the system 200 for reducing the working noise of the in-vehicle compressor further includes:
the acquisition unit is used for acquiring the vibration sensor data to obtain the actual working frequency of the compressor;
the comparison unit is used for judging whether the absolute value of the difference between the actual working frequency and the theoretical working frequency is larger than 5HZ; if not, executing the step of collecting the sound information of the sensor position points under the corresponding working condition of the compressor and carrying out spectrum analysis on the sound information; if yes, replacing the value of the theoretical working frequency with the value of the actual working frequency, executing the steps of collecting the sound information of the sensor position point under the corresponding working condition of the compressor, and carrying out spectrum analysis on the sound information.
The functions or operation steps implemented when the above modules are executed are substantially the same as those in the above method embodiments, and are not described herein again.
Example III
In another aspect, referring to fig. 3, a schematic diagram of an electronic device according to a third embodiment of the present invention is provided, including a memory 20, a processor 10, and a computer program 30 stored in the memory and capable of running on the processor, where the processor 10 implements the method for reducing the noise of the in-vehicle compressor according to the above method when executing the computer program 30.
The processor 10 may be, among other things, a central processing unit (Central Processing Unit, CPU), a controller, a microcontroller, a microprocessor or other data processing chip for running program code or processing data stored in the memory 20, e.g. executing an access restriction program or the like, in some embodiments.
The memory 20 includes at least one type of readable storage medium including flash memory, a hard disk, a multimedia card, a card memory (e.g., SD or DX memory, etc.), a magnetic memory, a magnetic disk, an optical disk, etc. The memory 20 may in some embodiments be an internal storage unit of the electronic device, such as a hard disk of the electronic device. The memory 20 may also be an external storage device of the electronic device in other embodiments, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash Card (Flash Card) or the like. Further, the memory 20 may also include both internal storage units and external storage devices of the electronic device. The memory 20 may be used not only for storing application software of an electronic device and various types of data, but also for temporarily storing data that has been output or is to be output.
It should be noted that the structure shown in fig. 3 does not constitute a limitation of the electronic device, and in other embodiments the electronic device may comprise fewer or more components than shown, or may combine certain components, or may have a different arrangement of components.
The embodiment of the invention also provides a computer readable storage medium, on which a computer program is stored, which when being executed by a processor, implements the method for reducing the working noise of an in-vehicle compressor as described above.
Those of skill in the art will appreciate that the logic and/or steps represented in the flow diagrams or otherwise described herein, e.g., a ordered listing of executable instructions for implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.
More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). In addition, the computer readable medium may even be paper or other suitable medium on which the program is printed, as the program may be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.
It is to be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. A method of reducing operating noise of an in-vehicle compressor, the method comprising:
under a preset condition, acquiring vehicle information, and obtaining theoretical working frequency of a compressor under corresponding working conditions according to the vehicle information through a preset formula;
controlling a sensor arranged on the vehicle to collect sound information under the corresponding working condition of the compressor, and performing spectrum analysis on the sound information;
obtaining a first sound pressure contribution quantity in a vehicle under the corresponding working condition of the compressor according to the theoretical working frequency and the spectrum analysis result;
comparing the first sound pressure contribution amount with a preset sound pressure contribution amount;
and if the first sound pressure contribution amount is larger than the preset sound pressure contribution amount, determining design parameters of the Helmholtz silencer according to the theoretical working frequency and the vehicle information through preset rules so as to reduce noise of the in-vehicle compressor through the Helmholtz silencer.
2. The method of reducing operating noise of an in-vehicle compressor of claim 1, wherein the preset conditions and the vehicle information include:
the vehicle information comprises the rotation speed ratio of the compressor to the engine, the rotation speed of the engine under the corresponding working condition, the number of the compressors and the pipe diameters of a high-pressure pipe and a low-pressure pipe of the compressor;
the preset conditions comprise that the communication system, the navigation system, the wiper and the heating system in the vehicle are in a closed state, the vehicle door window, the skylight and the skylight cover plate are in a closed state, the seat is positioned at a horizontal and vertical middle position, and the middle position is 45 degrees clockwise.
3. According to claim 2The method for reducing the working noise of the in-vehicle compressor is characterized in that the preset formula is as follows:
f is the theoretical working frequency, X is the rotation speed ratio of the compressor to the engine, N is the rotation speed of the engine under the corresponding working condition, and Y is the number of the compressors.
4. The method of reducing operating noise of an in-vehicle compressor of claim 1, wherein the preset rules include:
where f is the frequency of desired muffling, V is muffler volume,
the length of the connecting pipeline is Sc, the sectional area of the connecting pipeline, D, the sectional diameter of the connecting pipeline and c, the sound velocity.
5. The method for reducing noise in operation of an in-vehicle compressor according to claim 2, wherein a sound pressure sensor is provided at an upper left side of the compressor and at a left ear of a main frame in the vehicle, and the step of obtaining a first sound pressure contribution amount of the compressor in the vehicle under the corresponding working condition according to the theoretical working frequency and the result of the spectral analysis includes:
according to the spectrum analysis result, obtaining theoretical sound pressure contribution values measured by the two sound pressure sensors under the theoretical working frequency and corresponding sound pressure contribution values measured by the two sound pressure sensors under all frequencies within the positive and negative 50HZ range of the theoretical working frequency;
judging whether the two theoretical sound pressure contribution values are respectively larger than all corresponding sound pressure contribution values of the corresponding sensor;
if so, the theoretical sound pressure contribution value measured by the compressor sensor is the first sound pressure contribution value;
and if not, returning to the step of executing the theoretical working frequency under the corresponding working condition of the compressor by the preset formula according to the vehicle information obtained under the preset condition.
6. The method for reducing noise in a vehicle interior compressor according to claim 2, wherein the compressor body is further provided with a vibration sensor, and the step of collecting the sound information of the sensor position point under the corresponding working condition of the compressor and performing spectrum analysis on the sound information comprises the steps of;
obtaining the vibration sensor data to obtain the actual working frequency of the compressor,
judging whether the absolute value of the difference between the actual working frequency and the theoretical working frequency is larger than 5HZ;
if not, executing the step of collecting the sound information of the sensor position points under the corresponding working condition of the compressor and carrying out spectrum analysis on the sound information;
if yes, replacing the value of the theoretical working frequency with the value of the actual working frequency, executing the steps of collecting the sound information of the sensor position point under the corresponding working condition of the compressor, and carrying out spectrum analysis on the sound information.
7. The method of reducing in-vehicle compressor operation noise according to any one of claims 1 to 6, further comprising:
and after the Helmholtz silencer is installed, the second sound pressure contribution of the compressor in the vehicle under the corresponding working condition is obtained, and the second sound pressure contribution is compared with a preset sound pressure contribution.
8. A system for reducing compressor operation noise in a vehicle, the system comprising:
the theoretical working frequency calculation module is used for acquiring vehicle information under a preset condition and obtaining theoretical working frequency of the compressor under corresponding working conditions through a preset formula according to the vehicle information;
the frequency spectrum analysis module is used for controlling a sensor arranged on the vehicle to acquire sound information under the corresponding working condition of the compressor and carrying out frequency spectrum analysis on the sound information;
the analysis module is used for obtaining a first sound pressure contribution quantity in the vehicle under the corresponding working condition of the compressor according to the theoretical working frequency and the frequency spectrum analysis result;
the judging module is used for comparing the first sound pressure contribution quantity with a preset sound pressure contribution quantity;
and the design parameter acquisition module is used for determining design parameters of the Helmholtz silencer according to the theoretical working frequency and the vehicle information through a preset rule if the first sound pressure contribution is larger than the preset sound pressure contribution so as to reduce noise of the in-vehicle compressor through the Helmholtz silencer.
9. A computer-readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the steps of the method of reducing the operating noise of an in-vehicle compressor as claimed in any one of claims 1 to 7.
10. An apparatus comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing a method of reducing operating noise of an in-vehicle compressor as claimed in any one of claims 1 to 7 when the program is executed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310302034.5A CN116025544B (en) | 2023-03-27 | 2023-03-27 | Method, system and equipment for reducing working noise of in-vehicle compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310302034.5A CN116025544B (en) | 2023-03-27 | 2023-03-27 | Method, system and equipment for reducing working noise of in-vehicle compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116025544A true CN116025544A (en) | 2023-04-28 |
| CN116025544B CN116025544B (en) | 2023-06-30 |
Family
ID=86089501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310302034.5A Active CN116025544B (en) | 2023-03-27 | 2023-03-27 | Method, system and equipment for reducing working noise of in-vehicle compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116025544B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102393246A (en) * | 2011-10-22 | 2012-03-28 | 重庆长安汽车股份有限公司 | Noise evaluation method for automobile generator under finished automobile state |
| US20170285626A1 (en) * | 2016-03-30 | 2017-10-05 | 3D Signals Ltd. | Acoustic monitoring of machinery |
| EP3379529A1 (en) * | 2017-03-21 | 2018-09-26 | RUAG Schweiz AG | Active noise control system in an aircraft and method to reduce the noise in the aircraft |
| CN111595590A (en) * | 2020-05-12 | 2020-08-28 | 安徽江淮汽车集团股份有限公司 | Idle noise optimization method, device, equipment and storage medium |
| CN112240278A (en) * | 2019-07-17 | 2021-01-19 | 郑州宇通客车股份有限公司 | Silencing method and silencing device for passenger car |
| JP2023024023A (en) * | 2021-08-06 | 2023-02-16 | トヨタテクニカルディベロップメント株式会社 | Noise source contribution analysis device, noise source contribution analysis method and noise source contribution analysis program |
-
2023
- 2023-03-27 CN CN202310302034.5A patent/CN116025544B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102393246A (en) * | 2011-10-22 | 2012-03-28 | 重庆长安汽车股份有限公司 | Noise evaluation method for automobile generator under finished automobile state |
| US20170285626A1 (en) * | 2016-03-30 | 2017-10-05 | 3D Signals Ltd. | Acoustic monitoring of machinery |
| EP3379529A1 (en) * | 2017-03-21 | 2018-09-26 | RUAG Schweiz AG | Active noise control system in an aircraft and method to reduce the noise in the aircraft |
| CN112240278A (en) * | 2019-07-17 | 2021-01-19 | 郑州宇通客车股份有限公司 | Silencing method and silencing device for passenger car |
| CN111595590A (en) * | 2020-05-12 | 2020-08-28 | 安徽江淮汽车集团股份有限公司 | Idle noise optimization method, device, equipment and storage medium |
| JP2023024023A (en) * | 2021-08-06 | 2023-02-16 | トヨタテクニカルディベロップメント株式会社 | Noise source contribution analysis device, noise source contribution analysis method and noise source contribution analysis program |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116025544B (en) | 2023-06-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109357822B (en) | Bridge rapid testing and evaluating method based on time-varying power characteristic change of axle coupling system | |
| US20160343180A1 (en) | Automobiles, diagnostic systems, and methods for generating diagnostic data for automobiles | |
| CN101696901A (en) | System and method for testing and analyzing automobile vibration | |
| US7522988B2 (en) | Method for monitoring functional components of a motor vehicle | |
| CN107664579A (en) | Transmission gear, which is uttered long and high-pitched sounds, engages order extraction and decision method | |
| CN109632086A (en) | Interior noise measuring method, apparatus, readable storage medium storing program for executing and computer equipment | |
| CN108362508A (en) | Auto NVH detection device, method and automobile remaining life appraisal procedure | |
| US20140107905A1 (en) | Method for diagnosing a supercharging system of internal combustion engines | |
| CN112611569B (en) | Intelligent diagnosis method and system for in-vehicle shaking problem of automobile start-stop working condition | |
| CN116025544B (en) | Method, system and equipment for reducing working noise of in-vehicle compressor | |
| CN111717143A (en) | Noise reduction control method and system for side window and vehicle | |
| CN113147636B (en) | Engine noise reduction method, automobile and computer readable storage medium | |
| CN109946091A (en) | A method of evading vehicle body low-frequency noise problem | |
| CN113295267B (en) | Method and system for evaluating sound of intake air flow based on sound scene and readable storage medium | |
| CN113806977B (en) | Noise vibration analysis method and system for automobile cooling fan | |
| CN111693138B (en) | Method, device, storage medium and apparatus for detecting opening noise of electric tail gate | |
| CN114483559A (en) | Electric air conditioner compressor noise risk assessment method | |
| CN109318862A (en) | Applied mental-acoustics index vehicle rain detector | |
| CN113959733A (en) | Method for evaluating auricle pressing sound caused by beat vibration | |
| CN114383848B (en) | Method, device, storage medium and equipment for predicting near-field airflow noise target value of supercharger | |
| CN114179737A (en) | Throttle signal checking method and system, readable storage medium and vehicle | |
| CN116793479A (en) | Tail pipe noise testing method, system, computer and readable storage medium | |
| CN110579274A (en) | Vehicle chassis fault sound diagnosis method and system | |
| CN113022235A (en) | Tire positioning method, device, equipment, storage medium and tire pressure monitoring method | |
| CN114323258A (en) | Method and device for testing noise contribution amount of vehicle interior power assembly |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |