CN113992299A - Ship noise frequency spectrum modulation method and device - Google Patents
Ship noise frequency spectrum modulation method and device Download PDFInfo
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Abstract
The invention provides a method and a device for modulating a ship noise frequency spectrum, wherein the method comprises the following steps: receiving a noise signal collected by a noise measuring instrument installed on the ship, wherein the noise signal comprises noise emitted by the ship sailing in a target sea area and noise emitted by a noise interference device installed on the ship in the target sea area; acquiring frequency spectrum data of the noise signal; and under the condition that the frequency spectrum data is not matched with the standard frequency spectrum of the target sea area environment noise, adjusting the emission parameters of the noise interference unit according to the standard frequency spectrum until the frequency spectrum data is matched with the standard frequency spectrum.
Description
Technical Field
The invention relates to the technical field of computers, in particular to a method and a device for modulating a ship noise frequency spectrum.
Background
The concealment of the ship is the key, so that the noise of the ship is controlled and is not found by detection equipment such as enemy sonar, and the ship is the core of the ship design. At present, ships and warships effectively reduce noise level through approaches such as buoyant raft installation, pump jet propulsion, hydrodynamic force appearance design.
However, the marine environment in which ships navigate is complex, and the requirements for the operating conditions of ships tend to be diversified. Therefore, how to continue to ensure the concealment of the ship to a certain extent under the requirements of diversified operation conditions in a complex marine environment, especially under the condition that the noise such as the starting and power conversion of the ship is difficult to reduce, is a difficult problem to be solved urgently at present.
Disclosure of Invention
The invention provides a method and a device for modulating a ship noise frequency spectrum, which are used for overcoming the defect of poor ship concealment in the prior art and achieving the purpose of enhancing the ship concealment.
The invention provides a ship noise frequency spectrum modulation method, which comprises the following steps:
receiving a noise signal collected by a noise measuring instrument installed on the ship, wherein the noise signal comprises noise emitted by the ship sailing in a target sea area and noise emitted by a noise interference device installed on the ship in the target sea area;
acquiring frequency spectrum data of the noise signal;
and under the condition that the frequency spectrum data is not matched with the standard frequency spectrum of the target sea area environment noise, adjusting the emission parameters of the noise interference unit according to the standard frequency spectrum until the frequency spectrum data is matched with the standard frequency spectrum.
According to the ship noise spectrum modulation method provided by the invention, the method further comprises the following steps:
acquiring the navigation time of the ship in the target sea area;
and acquiring a standard frequency spectrum of the environmental noise of the target sea area in the target time period of the navigation time.
According to the ship noise spectrum modulation method provided by the invention, the standard spectrum of the target sea area environmental noise in the target time period of the navigation time is acquired, and the method comprises the following steps:
inquiring the candidate frequency spectrum of the target sea area environmental noise in an environmental noise frequency spectrum library;
and selecting a standard frequency spectrum corresponding to the navigation time from the candidate frequency spectrums.
According to the ship noise spectrum modulation method provided by the invention, the method further comprises the following steps:
and controlling the noise interference device to transmit a noise signal based on the transmission parameter corresponding to the spectrum data under the condition that the spectrum data is matched with the standard spectrum.
According to the ship noise spectrum modulation method provided by the invention, the method further comprises the following steps:
and sending an alarm signal when the frequency spectrum data is not matched with the standard frequency spectrum.
The invention also provides a ship noise frequency spectrum modulation device, which comprises:
a receiving module, configured to receive a noise signal collected by a noise measurement instrument installed on the ship, where the noise signal includes noise emitted from the ship sailing in a target sea area and noise emitted from a noise interference unit installed on the ship in the target sea area;
the first acquisition module is used for acquiring the frequency spectrum data of the noise signal;
and the adjusting module is used for adjusting the emission parameters of the noise interference unit according to the standard frequency spectrum under the condition that the frequency spectrum data is not matched with the standard frequency spectrum of the target sea area environment noise until the frequency spectrum data is matched with the standard frequency spectrum.
According to the present invention, there is provided a ship noise spectrum modulation apparatus, the apparatus further comprising:
the acquisition module is used for acquiring the navigation time of the ship in the target sea area;
and the second acquisition module is used for acquiring the standard frequency spectrum of the target sea area environmental noise corresponding to the navigation time.
The invention also provides an electronic device, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the program to realize the steps of any one of the ship noise spectrum modulation methods.
The present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method of spectral modulation of ship noise as described in any one of the above.
The present invention also provides a computer program product comprising a computer program which, when executed by a processor, performs the steps of the method for spectral modulation of ship noise as described in any of the above.
The invention provides a method and a device for modulating a ship noise frequency spectrum, which receive a noise signal collected by a noise measuring instrument arranged on a ship, wherein the noise signal comprises noise emitted by the ship sailing in a target sea area and noise emitted by a noise interference device arranged on the ship in the target sea area; acquiring frequency spectrum data of the noise signal; and under the condition that the frequency spectrum data is not matched with the standard frequency spectrum of the target sea area environment noise, adjusting the emission parameters of the noise interference unit according to the standard frequency spectrum until the frequency spectrum data is matched with the standard frequency spectrum.
In the technical scheme of the invention, the frequency spectrum data of the noise transmitted by the noise interference device is matched with the standard frequency spectrum by adjusting the transmission parameters of the noise interference device, so that the characteristic frequency spectrum of the ship running is concealed to a certain extent, and the concealment of the ship can be effectively improved. In addition, the scheme can actively provide the concealment of the ship in each navigation environment.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is one of the flow diagrams of the ship noise spectrum modulation method provided by the present invention;
FIG. 2 is a second schematic flow chart of the method for modulating the frequency spectrum of the ship noise according to the present invention;
fig. 3 is a third schematic flow chart of the ship noise spectrum modulation method provided by the present invention;
FIG. 4 is a fourth flowchart of the ship noise spectrum modulation method provided by the present invention;
fig. 5 is one of the schematic structural diagrams of the ship noise spectrum modulation device provided by the present invention;
fig. 6 is a second schematic structural diagram of the ship noise spectrum modulation apparatus provided in the present invention;
fig. 7 is a third schematic structural diagram of a ship noise spectrum modulation apparatus provided by the present invention;
FIG. 8 is a fourth schematic structural diagram of the ship noise spectrum modulation apparatus provided in the present invention;
fig. 9 is a schematic structural diagram of an electronic device provided by the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The ship noise spectrum modulation method of the present invention is described below with reference to fig. 1 to fig. 4, where an execution main body of the method is a ship noise spectrum modulation system or a control module for operating the ship noise spectrum modulation system, and may also be a server for installing the control module, such as a data processing server disposed inside a ship body, which is not limited herein.
Referring to fig. 1, a noise spectrum modulation method provided in the embodiment of the present invention includes the following steps:
step 110: receiving a noise signal collected by a noise measuring instrument installed on the ship, wherein the noise signal comprises noise emitted by the ship sailing in a target sea area and noise emitted by a noise interference device installed on the ship in the target sea area;
step 120: acquiring frequency spectrum data of the noise signal;
step 130: and under the condition that the frequency spectrum data is not matched with the standard frequency spectrum of the target sea area environment noise, adjusting the emission parameters of the noise interference unit according to the standard frequency spectrum until the frequency spectrum data is matched with the standard frequency spectrum.
In practical application, the noise measuring instrument is dragged at the tail part of a ship, and a noise interference device is arranged near the ship body of the ship. The noise interference device is one of the commonly used underwater acoustic countermeasures, and has the functions of transmitting random noise in a certain frequency band when a ship is detected and tracked by sonar, improving the noise level of an input end of the sonar, interfering the normal work of the ship by reducing the signal to noise ratio of the sonar, and shielding the ship to avoid maneuvering.
The noise measuring instrument disclosed by the embodiment of the invention is used for collecting interference noise signals emitted by the noise interference device in real time.
In the technical scheme of the embodiment of the invention, the frequency spectrum data of the noise transmitted by the noise interference device is matched with the standard frequency spectrum by adjusting the transmission parameters of the noise interference device, so that the characteristic frequency spectrum of the running ship is concealed to a certain extent, and the concealment of the ship can be effectively improved. In addition, the scheme can actively provide the concealment of the ship in each navigation environment.
Referring to fig. 2, a method for modulating a ship noise spectrum according to an alternative embodiment of the present invention includes the following steps:
step 210: receiving a noise signal collected by a noise measuring instrument installed on the ship, wherein the noise signal comprises noise emitted by the ship sailing in a target sea area and noise emitted by a noise interference device installed on the ship in the target sea area;
step 220: acquiring frequency spectrum data of the noise signal;
step 230: acquiring the navigation time of the ship in the target sea area;
step 240: acquiring a standard frequency spectrum of the environmental noise of the target sea area in a target time period of the navigation time;
step 250: and under the condition that the frequency spectrum data is not matched with the standard frequency spectrum of the target sea area environment noise, adjusting the emission parameters of the noise interference unit according to the standard frequency spectrum until the frequency spectrum data is matched with the standard frequency spectrum.
The timing sequence between steps 230 and 240 and steps 210 and 220 is not limited by fig. 2.
Therefore, even for the same target sea area, the environmental noises in different time periods may have differences, and the launching parameters are adjusted more accurately by acquiring the navigation time in real time, so that the ship navigation concealment is enhanced.
In the embodiment of the present invention, referring to fig. 3, the following steps are adopted to obtain the standard frequency spectrum of the target sea area environmental noise in the target time period of the voyage time:
step 310: inquiring the candidate frequency spectrum of the target sea area environmental noise in an environmental noise frequency spectrum library;
step 320: and selecting a standard frequency spectrum corresponding to the navigation time from the candidate frequency spectrums.
In this embodiment, the environmental noise frequency spectrum library stores frequency spectrum data of environmental noise in different sea areas, and further stores frequency spectrum data of environmental noise in different time periods for the same sea area.
Wherein the ambient noise frequency spectrum library is constructed in advance.
In particular, in k sea areas where ships run, at a plurality of [ t [ t ] ]a,tb]Time period, using noise measuring instrument of experimental ship to continuously monitor time sequence signal V of environmental noise1(t)、V2(t)...Vk(t) of (d). Based on software such as MATLAB, LabVIEW or Origin, respectively carrying out spectrum analysis on the three time sequence signals, wherein the specific process is as follows:
first, for a certain period of time [ t ]a,tb]Time sequence signal V collected by noise measuring instrument1(t)、V2(t)...Vk(t) m data each, respectively:
V1(m)＝[V11(ta)、V12(ta)、…V1m(tb)]；
V2(m)＝[V21(ta)、V22(ta)、…V2m(tb)]；
…
Vk(m)＝[Vk1(ta)、Vk2(ta)、…Vkm(tb)]；
time sequence signal V collected by environment noise measuring instrument in each sea area1(t)、V2(t)...Vk(t), performing spectrum analysis based on software such as MATLAB, LabVIEW or Origin, equally dividing the frequency domain into (p-1) parts to form environmental noise in each sea area in a time period [ t ]a,tb]Power spectrum of (d):
X1(ta～tb)＝[X1(f1)、X1(f2)、…X1(fp)]；
X2(ta～tb)＝[X2(f1)、X2(f2)、…X2(fp)]；
…
Xk(ta～tb)＝[Xk(f1)、Xk(f2)、…Xk(fp)]。
wherein,
second, for each [ t ]a,tb]The analysis is carried out in time periods to obtain a series of environmental noises in each sea area [ t ]a,tb]Respectively carrying out averaging processing on the frequency spectrums in the time periods to obtain k standard frequency spectrums X 'of the sea area environmental noise'1(ta～tb)、X′2(ta～tb)…X′k(ta～tb). Wherein,
X′1(ta～tb)＝[X′1(f1)、X′1(f2)、…X′1(fp)]；
X′2(ta～tb)＝[X′2(f1)、X′2(f2)、…X′2(fp)]；
...
X′k(ta～tb)＝[X′k(f1)、X′k(f2)、…X′k(fp)]。
and finally, inputting the k sea area environmental noise standard frequency spectrums operated by the ship into a database to form an environmental noise standard frequency spectrum library of the ship.
In an embodiment of the present invention, the transmit parameters of the noise jammer are adjusted as follows.
When a ship sails in a certain sea area, the noise measuring instrument measures the received noise signal in real time, transmits the noise signal to the data processing server, performs noise spectrum analysis on the data processing server, and performs correlation comparison with the standard spectrum of the environmental noise of the operating sea area, namely, the matching corresponding to the above.
If the correlation degree does not reach a certain level, adjusting the emission parameters of the noise interference device, continuously detecting and analyzing the detection noise frequency spectrum of the noise measuring instrument, performing correlation comparison again on the detection noise frequency spectrum and the standard frequency spectrum of the operating sea area environmental noise, and circulating the steps until the correlation degrees of the detection noise frequency spectrum and the standard frequency spectrum of the operating sea area environmental noise reach a certain level and correspond to the matching. The specific process is as follows:
firstly, when a ship sails in a certain sea area, a noise measuring instrument measures a received noise time sequence signal S (t) in real time1) And continuously calculating [ t ] according to the above steps of constructing the ambient noise frequency spectrum librarya,tb]Frequency spectrum Y (t) of noise signal measured by noise measuring instrument in time perioda～tb) Wherein:
Y(ta～tb)＝[Y(f1)、Y(f2)、…Y(fp)]。
secondly, based on software such as MATLAB, LabVIEW or Origin, the noise measuring instrument measures t in real timea,tb]Noise signal spectrum Y (t) in time segmenta～tb) And the standard frequency spectrum X 'of the environmental noise of the navigation sea area where the ship is located'n(ta～tb) Performing correlation analysis, and calculating correlation coefficient eta (t)a～tb)：
Wherein,
is [ Y (f) ]1)、Y(f2)、…Y(fp)]Is determined by the average value of (a) of (b),
is [ X'n(f1)、X′n(f2)、…X′n(fp)]N is a positive integer, and n is greater than or equal to 1 and less than or equal to k.
Finally, if the correlation coefficient η (t)a～tb) When a certain level (more than or equal to 90 percent) is reached, the noise interference device does not need to be started or adjusted. If the correlation coefficient eta (t)a～tb) Cannot reach a certain level (<90%), the transmit parameters of the noise jammer are adjusted.
The noise interference unit generally transmits random noise within a certain frequency range, the frequency range and the noise intensity are used as adjustable transmission parameters, the random noise is divided into a plurality of stages in an adjustable range, and the stages are sequentially selected from small to large.
Meanwhile, the detection noise spectrum of the noise measuring instrument is continuously detected and analyzed according to the two links, and is subjected to secondary correlation comparison with the standard spectrum of the environmental noise of the marine area where the ship runs, so that the frequency range and the noise intensity of the noise interference device are adjusted until the correlation degree of the frequency range and the noise intensity reaches a certain level (more than or equal to 90%).
In the embodiment of the invention, the decision can be assisted and commanded according to the correlation between the adjusted frequency spectrum data and the standard frequency spectrum of the environmental noise of the navigation sea area where the ship is located.
If the noise signal frequency spectrum measured by the noise measuring instrument in real time and the environmental noise standard frequency spectrum of the navigation sea area where the ship is located can reach a certain level (more than or equal to 90%) by adjusting the noise interference device within a period of time, the fact that the noise frequency spectrum of the periphery of the ship under the navigation working condition is very similar to the environmental noise frequency spectrum of the sea area where the ship is located is indicated, and the concealment and environmental adaptability of the ship can be improved.
In this case, when the adjusted spectrum data matches the standard spectrum, the noise interference unit is controlled to transmit the noise signal based on the transmission parameter corresponding to the spectrum data.
Even in a period of time, the noise signal frequency spectrum measured by the noise measuring instrument in real time and the environmental noise standard frequency spectrum of the navigation sea area where the ship is located still cannot reach a certain level (< 90%) by adjusting the noise interference device, the concealment and the environmental adaptability of the ship can be improved to a certain extent, meanwhile, an alarm signal is sent to the coxswain, the coxswain is reminded to change the navigation mode or to exit the sea area as soon as possible, and the decision-making assisting effect is exerted.
In this case, referring to fig. 4, an alternative embodiment of the present invention provides a ship noise spectrum modulation method including the steps of:
step 410: receiving a noise signal collected by a noise measuring instrument installed on the ship, wherein the noise signal comprises noise emitted by the ship sailing in a target sea area and noise emitted by a noise interference device installed on the ship in the target sea area;
step 420: acquiring frequency spectrum data of the noise signal;
step 430: judging whether the frequency spectrum data is matched with a standard frequency spectrum of the target sea area environmental noise;
step 440: if so, namely under the condition that the frequency spectrum data is not matched with the standard frequency spectrum of the target sea area environmental noise, adjusting the emission parameters of the noise interference unit according to the standard frequency spectrum until the frequency spectrum data is matched with the standard frequency spectrum;
step 450: if not, namely under the condition that the frequency spectrum data is not matched with the standard frequency spectrum, sending an alarm signal.
The ship noise spectrum modulation device provided by the invention is described below, and the ship noise spectrum modulation device described below and the ship noise spectrum modulation method described above can be referred to correspondingly.
Referring to fig. 5, the ship noise spectrum modulation apparatus provided in the embodiment of the present invention includes:
a receiving module 510, configured to receive a noise signal collected by a noise measuring instrument installed on the ship, where the noise signal includes noise emitted by the ship sailing in a target sea area and noise emitted by a noise interference unit installed on the ship in the target sea area;
a first obtaining module 520, which obtains spectrum data of the noise signal;
and an adjusting module 530, configured to, when the spectrum data does not match the standard spectrum of the target sea area environmental noise, adjust the transmission parameter of the noise interferer according to the standard spectrum until the spectrum data matches the standard spectrum.
In the ship noise frequency spectrum modulation device provided by the embodiment of the invention, the frequency spectrum data of the noise transmitted by the noise interference device is matched with the standard frequency spectrum by adjusting the transmission parameters of the noise interference device, so that the characteristic frequency spectrum of the ship operation is concealed to a certain extent, and the concealment of the ship can be effectively improved. In addition, the scheme can actively provide the concealment of the ship in each navigation environment.
Optionally, referring to fig. 6, compared to fig. 5, the apparatus further includes:
an acquisition module 610 that acquires a voyage time of the ship in the target sea area;
the second obtaining module 620 obtains a standard frequency spectrum of the target sea area environmental noise corresponding to the voyage time.
Optionally, the second obtaining module 620 is specifically configured to:
inquiring the candidate frequency spectrum of the target sea area environmental noise in an environmental noise frequency spectrum library;
and selecting a standard frequency spectrum corresponding to the navigation time from the candidate frequency spectrums.
Optionally, referring to fig. 7, compared to fig. 5, the apparatus further includes:
and the control module 710 controls the noise interference unit to transmit the noise signal based on the transmission parameter corresponding to the spectrum data when the spectrum data is matched with the standard spectrum.
Optionally, referring to fig. 8, compared to fig. 5, the apparatus further includes:
and a sending module 810 for sending an alarm signal when the spectrum data is not matched with the standard spectrum.
Fig. 9 illustrates a physical structure diagram of an electronic device, and as shown in fig. 9, the electronic device may include: a processor (processor)910, a communication Interface (Communications Interface)920, a memory (memory)930, and a communication bus 940, wherein the processor 910, the communication Interface 920, and the memory 930 communicate with each other via the communication bus 940. The processor 910 may invoke logic instructions in the memory 930 to perform a method of ship noise spectrum modulation, the method comprising:
receiving a noise signal collected by a noise measuring instrument installed on the ship, wherein the noise signal comprises noise emitted by the ship sailing in a target sea area and noise emitted by a noise interference device installed on the ship in the target sea area;
acquiring frequency spectrum data of the noise signal;
and under the condition that the frequency spectrum data is not matched with the standard frequency spectrum of the target sea area environment noise, adjusting the emission parameters of the noise interference unit according to the standard frequency spectrum until the frequency spectrum data is matched with the standard frequency spectrum.
Furthermore, the logic instructions in the memory 930 may be implemented in software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In another aspect, the present invention also provides a computer program product, the computer program product comprising 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 ship noise spectrum modulation method provided by the above methods, the method comprising:
receiving a noise signal collected by a noise measuring instrument installed on the ship, wherein the noise signal comprises noise emitted by the ship sailing in a target sea area and noise emitted by a noise interference device installed on the ship in the target sea area;
acquiring frequency spectrum data of the noise signal;
and under the condition that the frequency spectrum data is not matched with the standard frequency spectrum of the target sea area environment noise, adjusting the emission parameters of the noise interference unit according to the standard frequency spectrum until the frequency spectrum data is matched with the standard frequency spectrum.
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, implements a method for modulating a ship noise spectrum provided by the above methods, the method comprising:
receiving a noise signal collected by a noise measuring instrument installed on the ship, wherein the noise signal comprises noise emitted by the ship sailing in a target sea area and noise emitted by a noise interference device installed on the ship in the target sea area;
acquiring frequency spectrum data of the noise signal;
and under the condition that the frequency spectrum data is not matched with the standard frequency spectrum of the target sea area environment noise, adjusting the emission parameters of the noise interference unit according to the standard frequency spectrum until the frequency spectrum data is matched with the standard frequency spectrum.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present 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 solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for modulating a ship noise frequency spectrum is characterized by comprising the following steps:
receiving a noise signal collected by a noise measuring instrument installed on the ship, wherein the noise signal comprises noise emitted by the ship sailing in a target sea area and noise emitted by a noise interference device installed on the ship in the target sea area;
acquiring frequency spectrum data of the noise signal;
and under the condition that the frequency spectrum data is not matched with the standard frequency spectrum of the target sea area environment noise, adjusting the emission parameters of the noise interference unit according to the standard frequency spectrum until the frequency spectrum data is matched with the standard frequency spectrum.
2. The method of ship noise spectral modulation of claim 1, further comprising:
acquiring the navigation time of the ship in the target sea area;
and acquiring a standard frequency spectrum of the environmental noise of the target sea area in the target time period of the navigation time.
3. The method according to claim 2, wherein the obtaining a standard spectrum of the target sea area environmental noise in a target time period within which the voyage time is located includes:
inquiring the candidate frequency spectrum of the target sea area environmental noise in an environmental noise frequency spectrum library;
and selecting a standard frequency spectrum corresponding to the navigation time from the candidate frequency spectrums.
4. The method of ship noise spectral modulation of claim 1, further comprising:
and controlling the noise interference device to transmit a noise signal based on the transmission parameter corresponding to the spectrum data under the condition that the spectrum data is matched with the standard spectrum.
5. The method of ship noise spectral modulation of claim 1, further comprising:
and sending an alarm signal when the frequency spectrum data is not matched with the standard frequency spectrum.
6. A ship noise spectrum modulation apparatus, comprising:
a receiving module, configured to receive a noise signal collected by a noise measurement instrument installed on the ship, where the noise signal includes noise emitted from the ship sailing in a target sea area and noise emitted from a noise interference unit installed on the ship in the target sea area;
the first acquisition module is used for acquiring the frequency spectrum data of the noise signal;
and the adjusting module is used for adjusting the emission parameters of the noise interference unit according to the standard frequency spectrum under the condition that the frequency spectrum data is not matched with the standard frequency spectrum of the target sea area environment noise until the frequency spectrum data is matched with the standard frequency spectrum.
7. The ship noise spectrum modulation device of claim 6, further comprising:
the acquisition module is used for acquiring the navigation time of the ship in the target sea area;
and the second acquisition module is used for acquiring the standard frequency spectrum of the target sea area environmental noise corresponding to the navigation time.
8. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the steps of the ship noise spectrum modulation method according to any one of claims 1 to 5 are implemented when the program is executed by the processor.
9. A non-transitory computer readable storage medium having stored thereon a computer program, which when executed by a processor implements the steps of the ship noise spectral modulation method according to any one of claims 1 to 5.
10. A computer program product comprising a computer program, characterized in that the computer program realizes the steps of the ship noise spectrum modulation method according to any one of claims 1 to 5 when being executed by a processor.
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