CN114811251B - Muffler control method and device, electronic equipment and muffler - Google Patents
Muffler control method and device, electronic equipment and muffler Download PDFInfo
- Publication number
- CN114811251B CN114811251B CN202210180155.2A CN202210180155A CN114811251B CN 114811251 B CN114811251 B CN 114811251B CN 202210180155 A CN202210180155 A CN 202210180155A CN 114811251 B CN114811251 B CN 114811251B
- Authority
- CN
- China
- Prior art keywords
- power spectrum
- muffler
- inner cannula
- length adjustment
- insertion pipe
- 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.)
- Active
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/02—Energy absorbers; Noise absorbers
- F16L55/027—Throttle passages
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/161—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general in systems with fluid flow
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Aviation & Aerospace Engineering (AREA)
- Combustion & Propulsion (AREA)
- Fluid Mechanics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Mechanical Engineering (AREA)
- Exhaust Silencers (AREA)
Abstract
The invention provides a muffler control method and device, electronic equipment and a muffler, and relates to the technical field of pipeline noise elimination. The method comprises the following steps: acquiring an actual power spectrum of the muffler under the current pipeline system working condition; and according to the actual power spectrum, determining an optimal length adjustment combination of the parts of the first inner cannula and the second inner cannula positioned in the expansion cavity, and controlling the length adjustment of the parts of the first inner cannula and the second inner cannula positioned in the expansion cavity to the optimal length adjustment combination. The silencer control method, the silencer control device, the electronic equipment and the silencer provided by the invention enable the silencer to adapt to different pipeline working conditions and meet the multi-working-condition requirements of a pipeline system.
Description
Technical Field
The invention relates to the technical field of pipeline noise elimination, in particular to a muffler control method and device, electronic equipment and a muffler.
Background
In the sea-going cooling system pipeline of the ship, the pipeline silencing can be realized to a certain extent by additionally arranging an expansion cavity silencer for silencing treatment.
However, the sound field, the flow field, the temperature field and the coupling influence of the sound field and the temperature field in the silencer have great influence on the performance, besides, the internal structure of the silencer has obvious influence on the performance, and meanwhile, the influence mechanisms are not quite clear, so that the silencing performance of the traditional expansion cavity silencer under the actual working condition is limited, and the multi-working condition requirement of the marine pipeline system of the ship is difficult to meet.
Disclosure of Invention
The invention provides a muffler control method, a muffler control device, electronic equipment and a muffler, which are used for solving the technical problem that the expansion cavity muffler in the prior art is difficult to meet the multiple-working-condition requirements of a pipeline system.
In a first aspect, the present invention provides a muffler control method, where the muffler includes a barrel, a first inner cannula and a second inner cannula, an expansion cavity is provided in the barrel, the first inner cannula and the second inner cannula are respectively inserted at opposite ends of the barrel and are communicated with the expansion cavity, the first inner cannula and the second inner cannula are both partially located in the expansion cavity, and the lengths of the portions of the first inner cannula and the second inner cannula located in the expansion cavity can be adjusted;
the muffler control method includes: acquiring an actual power spectrum of the muffler under the current pipeline system working condition;
and according to the actual power spectrum, determining an optimal length adjustment combination of the parts of the first inner cannula and the second inner cannula positioned in the expansion cavity, and controlling the length adjustment of the parts of the first inner cannula and the second inner cannula positioned in the expansion cavity to the optimal length adjustment combination.
According to the muffler control method provided by the invention, the obtaining of the actual power spectrum of the muffler under the current pipeline system working condition comprises the following steps:
acquiring an actual water flow noise time sequence signal of the first inner cannula in a preset time period under the current pipeline system working condition;
and obtaining the actual power spectrum based on the actual water flow noise time sequence signal.
According to the muffler control method provided by the invention, the determining, according to the actual power spectrum, an optimal length adjustment combination of the portions of the first inner cannula and the second inner cannula located in the expansion cavity comprises:
and determining a transmission loss power spectrum with the maximum correlation with the actual power spectrum based on a transmission loss power spectrum library of the muffler, and taking the length adjustment combination corresponding to the transmission loss power spectrum with the maximum correlation with the actual power spectrum as the optimal length adjustment combination.
According to the muffler control method provided by the invention, before the actual power spectrum of the muffler under the current pipeline system working condition is obtained, the muffler control method further comprises the following steps:
acquiring a plurality of said length adjustment combinations regarding the length of the portions of said first inner cannula and said second inner cannula located within said inflation lumen;
and acquiring a transmission loss power spectrum corresponding to each length adjustment combination to form the transmission loss power spectrum library.
According to the muffler control method provided by the present invention, the obtaining a plurality of the length adjustment combinations regarding the lengths of the portions of the first inner cannula and the second inner cannula located in the expansion chamber specifically includes:
the length of the part of the first inner insertion tube positioned in the expansion cavity is provided with m adjusting gears, the length of the part of the second inner insertion tube positioned in the expansion cavity is provided with n adjusting gears, and the adjusting gears of the first inner insertion tube and the second inner insertion tube are sequentially combined to obtain at most m multiplied by n length adjusting combinations.
According to the muffler control method provided by the invention, the obtaining of the transmission loss power spectrum corresponding to each length adjustment combination specifically comprises the following steps:
in each length adjustment combination, a first water flow noise time sequence signal of the first inner cannula and a second water flow noise time sequence signal of the second inner cannula in preset time periods are obtained;
acquiring a first power spectrum of the first water flow noise time sequence signal and a second power spectrum of the second water flow noise time sequence signal within the preset duration;
and performing difference processing on the first power spectrum and the second power spectrum to obtain the transmission loss power spectrum under each length adjustment combination.
According to the muffler control method provided by the invention, the determining the transmission loss power spectrum with the largest correlation with the actual power spectrum based on the transmission loss power spectrum library of the muffler comprises the following steps:
acquiring a correlation coefficient of the actual power spectrum and the transmission loss power spectrum under each length adjustment combination;
and using the transmission loss power spectrum with the maximum correlation coefficient as the transmission loss power spectrum with the maximum correlation with the actual power spectrum.
In a second aspect, the present invention further provides a muffler control device, where the muffler includes a barrel, a first inner cannula and a second inner cannula, an expansion cavity is provided in the barrel, the first inner cannula and the second inner cannula are respectively inserted at opposite ends of the barrel and are communicated with the expansion cavity, the first inner cannula and the second inner cannula are both partially located in the expansion cavity, and the lengths of the portions of the first inner cannula and the second inner cannula located in the expansion cavity can be adjusted;
the muffler control device includes:
the acquisition unit is used for acquiring an actual power spectrum of the silencer under the current pipeline system working condition;
and the control unit is used for determining an optimal length adjustment combination of the parts of the first inner cannula and the second inner cannula positioned in the expansion cavity according to the actual power spectrum, and controlling the length adjustment of the parts of the first inner cannula and the second inner cannula positioned in the expansion cavity to the optimal length adjustment combination.
In a third aspect, the present invention also provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the muffler control method according to the first aspect when executing the program.
In a fourth aspect, the present invention provides a muffler including a barrel, a first inner cannula, a second inner cannula, a first drive device, and a second drive device;
the cylinder body is internally provided with an expansion cavity, the first inner insertion pipe and the second inner insertion pipe are respectively inserted into the two opposite ends of the cylinder body and are communicated with the expansion cavity, the first inner insertion pipe and the second inner insertion pipe are both partially positioned in the expansion cavity, the first driving device is in transmission connection with the first inner insertion pipe, the second driving device is in transmission connection with the second inner insertion pipe, and the first driving device and the second driving device are respectively used for driving the first inner insertion pipe and the second inner insertion pipe to move so as to adjust the lengths of the parts of the first inner insertion pipe and the second inner insertion pipe positioned in the expansion cavity;
the muffler further comprises an electronic device according to the third aspect, which is communicatively connected to the first driving means and the second driving means.
According to the silencer control method, the silencer control device, the electronic equipment and the silencer, the optimal length adjustment combination of the parts of the first inner insertion pipe and the second inner insertion pipe, which are positioned in the expansion cavity, is determined according to the actual power spectrum, and the lengths of the parts of the first inner insertion pipe and the second inner insertion pipe, which are positioned in the expansion cavity, are controlled to be adjusted to the optimal length adjustment combination, so that the silencing performance of the silencer under the current pipeline system working condition is effectively improved, the silencer can adapt to different pipeline working conditions, and the multi-working condition requirements of the pipeline system are met.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a muffler provided by the present invention;
FIG. 2 is a flow chart of a muffler control method provided by the present invention;
fig. 3 is a schematic structural diagram of an electronic device provided by the present invention.
Reference numerals:
10: a cylinder; 11: an expansion chamber; 20: a first inner cannula; 30: a second inner cannula; 40: a sound pressure sensor; 51: a first driving device; 52: and a second driving device.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
According to the muffler control method provided by the embodiment of the invention, as shown in fig. 1, the muffler comprises a cylinder 10, a first inner cannula 20 and a second inner cannula 30, an expansion cavity 11 is arranged in the cylinder 10, the first inner cannula 20 and the second inner cannula 30 are respectively inserted at two opposite ends of the cylinder 10 and are communicated with the expansion cavity 11, the first inner cannula 20 and the second inner cannula 30 are both partially positioned in the expansion cavity 11, and the lengths of the portions of the first inner cannula 20 and the second inner cannula 30 positioned in the expansion cavity 11 can be adjusted. According to the embodiment shown in fig. 2, the muffler control method includes:
s100: acquiring an actual power spectrum of the muffler under the current pipeline system working condition;
s200: based on the actual power spectrum, an optimal length adjustment combination of the portions of the first inner cannula 20 and the second inner cannula 30 located within the expansion chamber 11 is determined, and the length adjustment of the portions of the first inner cannula 20 and the second inner cannula 30 located within the expansion chamber 11 is controlled to the optimal length adjustment combination.
The first inner cannula 20 is positioned at the inlet end of the expansion chamber 11 and the second inner cannula 30 is positioned at the outlet end of the expansion chamber 11, with water flowing through the first inner cannula 20, the expansion chamber 11 and the second inner cannula 30 in sequence.
Length L of the portion of the first inner cannula 20 located within the expansion chamber 11 1 And the length L of the portion of the second inner tube 30 located within the expansion chamber 11 2 Has an effect on the acoustic properties of the sound abatement system. Generally, L 1 And L is equal to 2 The larger the peak frequency in the sound pressure transmission loss curve is, the lower the peak frequency is, but the sound damping performance of the entire muffler cannot be accurately determined. Thus, by providing the length of the portions of the first and second inner cannulas 20, 30 within the expansion chamber 11 can be adjusted, helping to reduce the water flow noise intensity under different pipe conditions.
In one embodiment, the muffler stores a database containing power spectrum and length adjustment combinations, and based on the database, the optimal length adjustment combination matched with the actual power spectrum can be determined, so that the optimal noise elimination effect under the current working condition is ensured.
According to the silencer control method provided by the invention, the optimal length adjustment combination of the parts of the first inner cannula 20 and the second inner cannula 30 positioned in the expansion cavity 11 is determined according to the actual power spectrum, and the lengths of the parts of the first inner cannula 20 and the second inner cannula 30 positioned in the expansion cavity 11 are controlled to be adjusted to the optimal length adjustment combination, so that the silencing performance of the silencer under the current pipeline system working condition is effectively improved, the silencer can adapt to different pipeline working conditions, and the multi-working condition requirements of the pipeline system are met.
Further, the step S100 of obtaining the actual power spectrum of the muffler under the current working condition of the pipe system includes:
s101: under the current pipeline system working condition, acquiring an actual water flow noise time sequence signal of the first inner cannula 20 within a preset time length;
s102: based on the actual water flow noise time sequence signal, an actual power spectrum is obtained.
Specifically, the first inner cannula 20 is provided with a sound pressure sensor 40, an actual water flow noise time sequence signal is obtained through the sound pressure sensor 40, then a power spectrum analysis is performed on the actual water flow noise time sequence signal before the water flow flows through the expansion cavity 11, and the frequency domain average (p-1) is divided into parts (wherein p is a positive integer and p is more than or equal to 3), so as to obtain a time [ t ] a ，t b ]Actual power spectrum X of internal actual water flow noise time sequence signal 1 ′f：
X 1 ′f＝{X 1 ′(f 1 )、X 1 ′(f 2 )、X 1 ′(f 3 )……X 1 ′(f p )}。
Further, in step S200, an optimal length adjustment combination of the portions of the first inner cannula 20 and the second inner cannula 30 located in the expansion chamber 11 is determined according to the actual power spectrum, including:
s201: and determining a transmission loss power spectrum with the maximum correlation with the actual power spectrum based on the transmission loss power spectrum library of the muffler, and taking a length adjustment combination corresponding to the transmission loss power spectrum with the maximum correlation with the actual power spectrum as an optimal length adjustment combination.
In one embodiment, the muffler is provided with a control module, the control module stores a preset transmission loss power spectrum library, the transmission loss power spectrum library comprises a plurality of length adjustment combinations and transmission loss power spectrums corresponding to the length adjustment combinations one by one, correlation analysis is carried out on the transmission loss power spectrums corresponding to the actual power spectrums and the length adjustment combinations corresponding to the transmission loss power spectrums with the maximum correlation of the actual power spectrums one by one, and the length adjustment combination corresponding to the transmission loss power spectrum with the maximum correlation of the actual power spectrums is the optimal length adjustment combination of the current working condition.
In another embodiment, before the step S100 of obtaining the actual power spectrum of the muffler under the current pipe system working condition, the muffler control method further includes:
s10: acquiring a plurality of length adjustment combinations regarding the length of the portions of the first inner cannula 20 and the second inner cannula 30 located within the expansion chamber 11;
s11: and acquiring a transmission loss power spectrum corresponding to each length adjustment combination to form a transmission loss power spectrum library.
By taking the length L of the portion of the first inner cannula 20 located within the expansion chamber 11 when the muffler is first put into use 1 And the length L of the portion of the second inner cannula 30 located within the expansion chamber 11 2 And combining to obtain various length adjustment combinations, and obtaining and storing a transmission loss power spectrum corresponding to each length adjustment combination to serve as a data basis for determining the optimal length adjustment combination subsequently. The optimal length adjustment combination has the best silencing effect, and under different working conditions of the pipeline system, the optimal silencing effect under the current working condition can be ensured by controlling the length adjustment of the parts of the first inner cannula 20 and the second inner cannula 30 positioned in the expansion cavity 11 to the optimal length adjustment combination.
Prior to step S10, the muffler control method may further include:
s1: and receiving an instruction for establishing a transmission loss power spectrum library.
In this embodiment, the operator may issue an instruction to the muffler to create a transmission loss power spectrum library, and step S10 and step S11 are repeated to create a new transmission loss power spectrum library.
Further, a plurality of length adjustment combinations regarding the lengths of the portions of the first inner cannula 20 and the second inner cannula 30 located within the expansion chamber 11 are acquired in step S10, specifically including:
length L of the portion of the first inner cannula 20 located within the expansion chamber 11 1 With m adjustment steps, the length L of the portion of the second inner tube 30 located in the expansion chamber 11 2 With n adjustment gears, the adjustment gears of the first inner cannula 20 and the second inner cannula 30 are combined in sequence, obtaining at most m x n length adjustment combinations.
Wherein, in m adjustment gears, the length of the part of the first inner cannula 20 positioned in the expansion cavity 11 is longer along with the sequential increase of the gearsDegree L 1 Then linearly grows, and L corresponding to any two adjacent adjusting gears 1 The values of (2) are the same. Similarly, in the n adjustment gears, as the gears sequentially increase, the length L of the portion of the second inner tube 30 located in the expansion chamber 11 2 Then linearly grows, and L corresponding to any two adjacent adjusting gears 2 The values of (2) are the same. The m adjustment ranges of the first inner tube 20 and the n adjustment ranges of the second inner tube 30 are sequentially arranged and combined, and at most m×n mutually different length adjustment combinations can be obtained.
Further, in step S11, a transmission loss power spectrum corresponding to each length adjustment combination is obtained, which specifically includes:
s111: in each length adjustment combination, a first water flow noise timing signal of the first inner cannula 20 and a second water flow noise timing signal of the second inner cannula 30 within a preset time period are obtained;
s112: acquiring a first power spectrum of a first water flow noise time sequence signal and a second power spectrum of a second water flow noise time sequence signal within a preset duration;
s113: and performing difference processing on the first power spectrum and the second power spectrum to obtain a transmission loss power spectrum under each length adjustment combination.
Wherein, the first inner cannula 20 and the second inner cannula 30 are respectively provided with a sound pressure sensor 40, the sound pressure sensor 40 in the first inner cannula 20 is used for acquiring a first water flow noise time sequence signal V before the water flow flows through the expansion cavity 11 1 (t) the acoustic pressure sensor 40 in the second inner tube 30 is used for acquiring a second water flow noise timing signal V after the water flow passes through the expansion chamber 11 2 (t). By noise timing signal V for first water flow 1 (t) and a second Water flow noise timing Signal V 2 And (t) performing spectrum analysis, and further calculating to obtain a transmission loss power spectrum under each length adjustment combination.
Specifically, in step S111, under the kth length adjustment combination (k=1, 2, 3 … …, m×n), at a period of time [ t ] a ，t b ]Inner first water flow noise timing signal V 1 (t) and a second Water flow noise timing Signal V 2 (t) has d pieces of data,the method comprises the following steps of:
V 1 (t)＝{V 11 ，V 12 ，V 13 ……V 1d }；
V 2 (t)＝{V 21 ，V 22 ，V 23 ……V 2d }。
in step S112, the first water flow noise timing signal V 1 (t) and a second Water flow noise timing Signal V 2 (t) performing power spectrum analysis, and taking the frequency domain average (p-1) as a part (wherein p is a positive integer and p is more than or equal to 3) to obtain a time [ t ] a ，t b ]Inner first water flow noise timing signal V 1 First power spectrum X of (t) 1 (f) And a second water flow noise timing signal V 2 Second power spectrum X of (t) 2 (f) The method comprises the following steps of:
X 1 (f)＝{X 1 (f 1 )，X 1 (f 2 )，X 1 (f 3 )……X 1 (f p )}；
X 2 (f)＝{X 2 (f 1 )，X 2 (f 2 )，X 2 (f 3 )……X 2 (f p )}。
wherein, the liquid crystal display device comprises a liquid crystal display device, f c is the acquisition frequency of the acoustic pressure sensor 40.
In step S113, for the first power spectrum X 1 (f) And a second power spectrum X 2 (f) Performing difference processing to obtain a transmission loss power spectrum Y under the kth length adjustment combination k (f) The method comprises the following steps:
Y k (f)＝{Y k (f 1 )，Y k (f 2 )，Y k (f 3 )......Y k (f p )}；
wherein Y is k (f 1 )＝X 1 (f 1 )-X 2 (f 1 )，Y k (f 2 )＝X 1 (f 2 )-X 2 (f 2 )，Y k (f 3 )＝X 1 (f 3 )-X 2 (f 3 )......Y k (f p )＝X 1 (f p )-X 2 (f p )。
Obtaining the transmission loss power spectrum Y under each length adjustment combination k (f) After that, the length adjustment combination and the corresponding transmission loss power spectrum Y are saved k (f) As a basis for the subsequent determination of the data for the optimal length adjustment combination.
Further, in step S201, the determination of the transmission loss power spectrum having the greatest correlation with the actual power spectrum based on the transmission loss power spectrum library of the muffler includes:
s2011: acquiring a correlation coefficient of an actual power spectrum and a transmission loss power spectrum under each length adjustment combination;
s2012: and taking the transmission loss power spectrum with the largest correlation coefficient as the transmission loss power spectrum with the largest correlation with the actual power spectrum.
Specifically, in step S2011, the actual power spectrum X is calculated 1 'f' transmission loss power spectrum Y under respective combination with m×n length adjustments in transmission loss power spectrum library k (f) Correlation analysis is carried out, and m multiplied by n correlation coefficients eta are obtained through calculation:
……
wherein, the liquid crystal display device comprises a liquid crystal display device,is { Y ] 1 (f 1 )，Y 1 (f 2 )，Y 1 (f 3 )......Y 1 (f p ) Mean value }, ∈>Is { Y ] 2 (f 1 )，Y 2 (f 2 )，Y 2 (f 3 )......Y 2 (f p ) Mean value }, ∈>Is { Y ] 3 (f 1 )，Y 3 (f 2 )，Y 3 (f 3 )......Y 3 (f p ) Mean value of }. The term "is used for the first time>Is { Y ] m×n (f 1 )，Y m×n (f 2 )，Y m×n (f 3 )......Y m×n (f p ) Average value of }. />Is { X ] 1 ′(f 1 )，X 1 ′(f 2 )，X 1 ′(f 3 )......X 1 ′(f p ) Average value of }.
After m×n correlation coefficients eta are obtained, eta is obtained by comparison 1 、η 2 、η 3 ......η m×n The correlation between the transmission loss power spectrum corresponding to the maximum value and the actual power spectrum is the maximum, and the length adjustment combination corresponding to the maximum value is the length adjustment combination with the optimal silencing performance of the pipeline system under the current working condition, so that the optimal length adjustment combination corresponding to the correlation coefficient eta for controlling the lengths of the parts of the first inner cannula 20 and the second inner cannula 30 positioned in the expansion cavity 11 to be the maximum can be controlled, and the optimal silencing effect of the silencer can be achieved under the current working condition.
Based on the above-mentioned muffler control method, the present invention further provides a muffler control device, where the muffler includes a barrel 10, a first inner cannula 20 and a second inner cannula 30, an expansion chamber 11 is provided in the barrel 10, the first inner cannula 20 and the second inner cannula 30 are respectively inserted at opposite ends of the barrel 10 and are communicated with the expansion chamber 11, the first inner cannula 20 and the second inner cannula 30 are both partially located in the expansion chamber 11, and the lengths of the portions of the first inner cannula 20 and the second inner cannula 30 located in the expansion chamber 11 can be adjusted.
The muffler control device includes an acquisition unit and a control unit.
The acquisition unit is used for acquiring the actual power spectrum of the muffler under the current pipeline system working condition.
The control unit is used for determining the optimal length adjustment combination of the parts of the first inner cannula 20 and the second inner cannula 30 positioned in the expansion cavity 11 according to the actual power spectrum, and controlling the length adjustment of the parts of the first inner cannula 20 and the second inner cannula 30 positioned in the expansion cavity 11 to the optimal length adjustment combination.
The present invention also provides an electronic device, fig. 3 illustrates a schematic physical structure of the electronic device, and as shown in fig. 3, the electronic device may include: processor 310, communication interface 320, memory 330 and communication bus 340, wherein processor 310, communication interface 320 and memory 330 communicate with each other via communication bus 340. The processor 310 may invoke logic instructions in the memory 330 to perform a muffler control method comprising: acquiring an actual power spectrum of the muffler under the current pipeline system working condition; based on the actual power spectrum, an optimal length adjustment combination of the portions of the first and second inner cannulas 20, 30 located within the expansion chamber 11 is determined, and the length adjustment of the portions of the first and second inner cannulas 20, 30 located within the expansion chamber 11 is controlled to the optimal length adjustment combination.
Further, the logic instructions in the memory 330 described above may be implemented in the form of software functional units and may be stored in a computer-readable storage medium when sold or used as a stand-alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a Read-only memory (ROM), a random access memory (RAM, randomAccessMemory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In another aspect, the present invention also provides a computer program product, the computer program product including a computer program, the computer program being storable on a non-transitory computer readable storage medium, the computer program, when executed by a processor, being capable of executing the muffler control method provided by the above methods, the method comprising: acquiring an actual power spectrum of the muffler under the current pipeline system working condition; based on the actual power spectrum, an optimal length adjustment combination of the portions of the first and second inner cannulas 20, 30 located within the expansion chamber 11 is determined, and the length adjustment of the portions of the first and second inner cannulas 20, 30 located within the expansion chamber 11 is controlled to the optimal length adjustment combination.
In yet another aspect, the present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, is implemented to perform the muffler control method provided by the above methods, the method comprising: acquiring an actual power spectrum of the muffler under the current pipeline system working condition; based on the actual power spectrum, an optimal length adjustment combination of the portions of the first and second inner cannulas 20, 30 located within the expansion chamber 11 is determined, and the length adjustment of the portions of the first and second inner cannulas 20, 30 located within the expansion chamber 11 is controlled to the optimal length adjustment combination.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
The present invention also provides a muffler including a cylinder 10, a first inner cannula 20, a second inner cannula 30, a first driving device 51 and a second driving device 52.
The cylinder 10 is internally provided with an expansion cavity 11, the first inner cannula 20 and the second inner cannula 30 are respectively inserted at two opposite ends of the cylinder 10 and are communicated with the expansion cavity 11, the first inner cannula 20 and the second inner cannula 30 are respectively positioned in the expansion cavity 11, a first driving device 51 is in transmission connection with the first inner cannula 20, a second driving device 52 is in transmission connection with the second inner cannula 30, and the first driving device 51 and the second driving device 52 are respectively used for driving the first inner cannula 20 and the second inner cannula 30 to move so as to adjust the lengths of the parts of the first inner cannula 20 and the second inner cannula 30 positioned in the expansion cavity 11.
The muffler further comprises the electronic device provided by the above embodiment, the electronic device is in communication connection with the first driving device 51 and the second driving device 52, and the electronic device is capable of controlling the first driving device 51 and the second driving device 52 to drive the first inner cannula 20 and the second inner cannula 30 to move.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. The muffler control method is characterized in that the muffler comprises a barrel, a first inner insertion pipe and a second inner insertion pipe, an expansion cavity is arranged in the barrel, the first inner insertion pipe and the second inner insertion pipe are respectively inserted into the two opposite ends of the barrel and are communicated with the expansion cavity, the first inner insertion pipe and the second inner insertion pipe are both partially positioned in the expansion cavity, and the lengths of the parts of the first inner insertion pipe and the second inner insertion pipe positioned in the expansion cavity can be adjusted;
the muffler control method includes:
acquiring an actual power spectrum of the muffler under the current pipeline system working condition;
according to the actual power spectrum, determining an optimal length adjustment combination of the parts of the first inner cannula and the second inner cannula positioned in the expansion cavity, and controlling the length adjustment of the parts of the first inner cannula and the second inner cannula positioned in the expansion cavity to the optimal length adjustment combination;
the obtaining the actual power spectrum of the muffler under the current pipeline system working condition comprises the following steps:
acquiring an actual water flow noise time sequence signal of the first inner cannula in a preset time period under the current pipeline system working condition;
and obtaining the actual power spectrum based on the actual water flow noise time sequence signal.
2. The muffler control method as defined in claim 1, wherein the determining an optimal length adjustment combination of portions of the first inner cannula and the second inner cannula located within the expansion chamber based on the actual power spectrum includes:
and determining a transmission loss power spectrum with the maximum correlation with the actual power spectrum based on a transmission loss power spectrum library of the muffler, and taking the length adjustment combination corresponding to the transmission loss power spectrum with the maximum correlation with the actual power spectrum as the optimal length adjustment combination.
3. The muffler control method as defined in claim 2, wherein the obtaining the actual power spectrum of the muffler at the current pipe system operating condition is preceded by:
acquiring a plurality of said length adjustment combinations regarding the length of the portions of said first inner cannula and said second inner cannula located within said inflation lumen;
and acquiring a transmission loss power spectrum corresponding to each length adjustment combination to form the transmission loss power spectrum library.
4. The muffler control method as defined in claim 3, wherein the acquiring a plurality of the length adjustment combinations regarding the lengths of the portions of the first inner cannula and the second inner cannula located within the expansion chamber, specifically includes:
the length of the part of the first inner insertion tube positioned in the expansion cavity is provided with m adjusting gears, the length of the part of the second inner insertion tube positioned in the expansion cavity is provided with n adjusting gears, and the adjusting gears of the first inner insertion tube and the second inner insertion tube are sequentially combined to obtain at most m multiplied by n length adjusting combinations.
5. The muffler control method as claimed in claim 3, wherein the acquiring the transmission loss power spectrum corresponding to each of the length adjustment combinations specifically includes:
in each length adjustment combination, a first water flow noise time sequence signal of the first inner cannula and a second water flow noise time sequence signal of the second inner cannula in preset time periods are obtained;
acquiring a first power spectrum of the first water flow noise time sequence signal and a second power spectrum of the second water flow noise time sequence signal within the preset duration;
and performing difference processing on the first power spectrum and the second power spectrum to obtain the transmission loss power spectrum under each length adjustment combination.
6. The muffler control method according to claim 5, wherein the determining a transmission loss power spectrum having the greatest correlation with the actual power spectrum based on a transmission loss power spectrum library of the muffler includes:
acquiring a correlation coefficient of the actual power spectrum and the transmission loss power spectrum under each length adjustment combination;
and using the transmission loss power spectrum with the maximum correlation coefficient as the transmission loss power spectrum with the maximum correlation with the actual power spectrum.
7. The silencer control device is characterized by comprising a barrel, a first inner insertion pipe and a second inner insertion pipe, wherein an expansion cavity is arranged in the barrel, the first inner insertion pipe and the second inner insertion pipe are respectively inserted into the two opposite ends of the barrel and are communicated with the expansion cavity, the first inner insertion pipe and the second inner insertion pipe are both partially positioned in the expansion cavity, and the lengths of the parts of the first inner insertion pipe and the second inner insertion pipe positioned in the expansion cavity can be adjusted;
the muffler control device includes:
the acquisition unit is used for acquiring an actual power spectrum of the silencer under the current pipeline system working condition;
and the control unit is used for determining an optimal length adjustment combination of the parts of the first inner cannula and the second inner cannula positioned in the expansion cavity according to the actual power spectrum, and controlling the length adjustment of the parts of the first inner cannula and the second inner cannula positioned in the expansion cavity to the optimal length adjustment combination.
8. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the muffler control method of any one of claims 1 to 6 when the program is executed by the processor.
9. A muffler, characterized in that the muffler comprises a cylinder, a first inner cannula, a second inner cannula, a first driving device and a second driving device;
the cylinder body is internally provided with an expansion cavity, the first inner insertion pipe and the second inner insertion pipe are respectively inserted into the two opposite ends of the cylinder body and are communicated with the expansion cavity, the first inner insertion pipe and the second inner insertion pipe are both partially positioned in the expansion cavity, the first driving device is in transmission connection with the first inner insertion pipe, the second driving device is in transmission connection with the second inner insertion pipe, and the first driving device and the second driving device are respectively used for driving the first inner insertion pipe and the second inner insertion pipe to move so as to adjust the lengths of the parts of the first inner insertion pipe and the second inner insertion pipe positioned in the expansion cavity;
the muffler further comprising the electronic device of claim 8 communicatively coupled to the first drive means and the second drive means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210180155.2A CN114811251B (en) | 2022-02-25 | 2022-02-25 | Muffler control method and device, electronic equipment and muffler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210180155.2A CN114811251B (en) | 2022-02-25 | 2022-02-25 | Muffler control method and device, electronic equipment and muffler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114811251A CN114811251A (en) | 2022-07-29 |
| CN114811251B true CN114811251B (en) | 2023-08-25 |
Family
ID=82529712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210180155.2A Active CN114811251B (en) | 2022-02-25 | 2022-02-25 | Muffler control method and device, electronic equipment and muffler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114811251B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010010289A (en) * | 1999-07-19 | 2001-02-05 | 이종훈 | Expention Chamber Silencer with extended inlet and outlet for Deasel generator |
| JP2012128230A (en) * | 2010-12-16 | 2012-07-05 | Yamaha Corp | Noise suppressor for air introduction pipe |
| CN202370617U (en) * | 2011-12-09 | 2012-08-08 | 厦门理工学院 | Self-regulation double-mode exhaust silencer |
| CN202902574U (en) * | 2012-11-08 | 2013-04-24 | 青岛海信日立空调系统有限公司 | Air conditioner exhaust silencing device |
| CN103382874A (en) * | 2013-07-11 | 2013-11-06 | 哈尔滨工程大学 | Dual-resonance self-frequency-modulation silencer |
| CN204553014U (en) * | 2015-03-11 | 2015-08-12 | 奇瑞汽车股份有限公司 | A kind of intake silencer |
| WO2015171681A1 (en) * | 2014-05-08 | 2015-11-12 | The Coca-Cola Company | Systems and methods for a dual-tuned expansion chamber muffler in a refrigeration cycle of a food or beverage device |
| KR20180012888A (en) * | 2016-07-27 | 2018-02-07 | 한국가스공사 | Third-party damage monitoring system and method using analysis of sound |
| CN107945782A (en) * | 2017-11-16 | 2018-04-20 | 海信（广东）空调有限公司 | Simple high-frequency silencer |
| CN111189928A (en) * | 2020-01-09 | 2020-05-22 | 哈尔滨工程大学 | Sound insulation measuring device and method for measuring plate-shaped component in reverberation sound insulation pool |
| CN112879142A (en) * | 2021-03-16 | 2021-06-01 | 桂林电子科技大学 | Intelligent noise reduction control system for automobile |
| CN113847119A (en) * | 2021-10-14 | 2021-12-28 | 安徽江淮汽车集团股份有限公司 | Frequency-adjustable silencer |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4392592B2 (en) * | 2003-12-12 | 2010-01-06 | トヨタ自動車株式会社 | Exhaust silencer |
| KR102610320B1 (en) * | 2018-03-30 | 2023-12-06 | 현대자동차주식회사 | Muffler having movable baffle and control method of the same |
-
2022
- 2022-02-25 CN CN202210180155.2A patent/CN114811251B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010010289A (en) * | 1999-07-19 | 2001-02-05 | 이종훈 | Expention Chamber Silencer with extended inlet and outlet for Deasel generator |
| JP2012128230A (en) * | 2010-12-16 | 2012-07-05 | Yamaha Corp | Noise suppressor for air introduction pipe |
| CN202370617U (en) * | 2011-12-09 | 2012-08-08 | 厦门理工学院 | Self-regulation double-mode exhaust silencer |
| CN202902574U (en) * | 2012-11-08 | 2013-04-24 | 青岛海信日立空调系统有限公司 | Air conditioner exhaust silencing device |
| CN103382874A (en) * | 2013-07-11 | 2013-11-06 | 哈尔滨工程大学 | Dual-resonance self-frequency-modulation silencer |
| WO2015171681A1 (en) * | 2014-05-08 | 2015-11-12 | The Coca-Cola Company | Systems and methods for a dual-tuned expansion chamber muffler in a refrigeration cycle of a food or beverage device |
| CN204553014U (en) * | 2015-03-11 | 2015-08-12 | 奇瑞汽车股份有限公司 | A kind of intake silencer |
| KR20180012888A (en) * | 2016-07-27 | 2018-02-07 | 한국가스공사 | Third-party damage monitoring system and method using analysis of sound |
| CN107945782A (en) * | 2017-11-16 | 2018-04-20 | 海信（广东）空调有限公司 | Simple high-frequency silencer |
| CN111189928A (en) * | 2020-01-09 | 2020-05-22 | 哈尔滨工程大学 | Sound insulation measuring device and method for measuring plate-shaped component in reverberation sound insulation pool |
| CN112879142A (en) * | 2021-03-16 | 2021-06-01 | 桂林电子科技大学 | Intelligent noise reduction control system for automobile |
| CN113847119A (en) * | 2021-10-14 | 2021-12-28 | 安徽江淮汽车集团股份有限公司 | Frequency-adjustable silencer |
Non-Patent Citations (1)
| Title |
|---|
| 拖拉机抗性消声器不同结构单元声学性能研究;梅盼;袁雪松;聂更倪;于海业;张强;;农机化研究(第04期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114811251A (en) | 2022-07-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Ouyang et al. | A fully convolutional neural network for complex spectrogram processing in speech enhancement | |
| CN114811251B (en) | Muffler control method and device, electronic equipment and muffler | |
| EP2285054A1 (en) | Filter for impulse response shortening, with additional spectral constraints, for multicarrier transmission | |
| CN108506742B (en) | Positioning method for self-adaptive effective signal determination of fluid pipeline leakage | |
| DE60112513D1 (en) | METHOD FOR EMPTYING A BLOOD CIRCULATION IN A DEVICE FOR EXTRACORPORAL BLOOD TREATMENT | |
| US6996597B2 (en) | Increasing precision in multi-stage processing of digital signals | |
| US8332222B2 (en) | Viterbi decoder and speech recognition method using same using non-linear filter for observation probabilities | |
| CN107463956B (en) | Cardiopulmonary sound separation method and device based on non-negative matrix decomposition | |
| CN109817239A (en) | The noise-reduction method and device of voice | |
| CN102996302B (en) | A kind of silencing apparatus simultaneously can eliminating wide band and narrow frequency band noise | |
| EP1096475A2 (en) | Frequency warping for speaker recognition | |
| CN108903914A (en) | A kind of heart sound kind identification method of the MFCC decomposed based on EMD | |
| CN114201929A (en) | Design method, device and equipment for conical inner rib heat exchange tube and storage medium | |
| CN109781245A (en) | A kind of method for objectively evaluating of diesel engine impulsive noise | |
| CN201934169U (en) | Exhaust silencer of diesel engine | |
| CN106255523B (en) | Method and device for controlling in vivo pressure using medical technology pump | |
| JP5385763B2 (en) | Hemodialysis machine | |
| Unnikrishnan et al. | Effect of finite word-length on SQNR, area and power for real-valued serial FFT | |
| CN115980521A (en) | Time difference estimation method for multi-source partial discharge ultrasonic signals | |
| Slock et al. | The fast subsampled-updating recursive least-squares (FSU RLS) algorithm for adaptive filtering based on displacement structure and the FFT | |
| CN109815546B (en) | Implementation method of high-speed parallel digital matched filter | |
| Wu et al. | Efficient matrix multiplication methods to implement a near-optimum channel shortening method for discrete multitone transceivers | |
| CN209855880U (en) | Exhaust silencer for racing car | |
| CN113626931B (en) | Modeling method and device for muffler, storage medium and computer equipment | |
| CN116504235B (en) | Audio recognition model training method and device based on time sequence |
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 |