CN107202385B - Sound wave mosquito repelling method and device and air conditioner - Google Patents
Sound wave mosquito repelling method and device and air conditioner Download PDFInfo
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- CN107202385B CN107202385B CN201710482779.9A CN201710482779A CN107202385B CN 107202385 B CN107202385 B CN 107202385B CN 201710482779 A CN201710482779 A CN 201710482779A CN 107202385 B CN107202385 B CN 107202385B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0096—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater combined with domestic apparatus
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- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M29/00—Scaring or repelling devices, e.g. bird-scaring apparatus
- A01M29/16—Scaring or repelling devices, e.g. bird-scaring apparatus using sound waves
- A01M29/18—Scaring or repelling devices, e.g. bird-scaring apparatus using sound waves using ultrasonic signals
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Abstract
The application provides a sound wave mosquito repelling method, a sound wave mosquito repelling device and an air conditioner, wherein the sound wave mosquito repelling method comprises the following steps: determining the position of a user; and transmitting mosquito repelling sound waves to the position where the user is located. The sound wave mosquito repelling method and device and the air conditioner have the advantages that the sound wave mosquito repelling is achieved according to the position of the user, the operation process is simple, manual operation of the user is not needed, time and energy of the user are saved, and user experience is improved.
Description
Technical Field
The application relates to the technical field of electronics, in particular to a sound wave mosquito repelling method and device and an air conditioner.
Background
At present, people generally adopt common mosquito-repellent incense, liquid mosquito-repellent incense and electric mosquito-repellent incense sheets to repel mosquitoes or pests. When a fan or an air conditioner is started, smoke can be blown away to reduce the mosquito repelling effect, and trace smoke generated by the common mosquito incense, the liquid mosquito incense and the electric mosquito incense sheet can harm a human body to a certain extent and can reduce the air quality. Therefore, the common mosquito incense, the liquid mosquito incense and the electric mosquito incense sheet are adopted to repel mosquitoes or pests, the mosquito repelling effect is poor, and the user experience is poor.
As a novel mosquito repelling means, the electronic mosquito dispeller has the advantages of no smoke or odor, cyclic use and the like, and is widely concerned by people. However, the existing electronic mosquito dispeller needs a user to manually open, close or arrange the mosquito dispelling direction, the operation process is complicated, the time and the energy of the user are consumed, and the user experience is poor.
Disclosure of Invention
The present application is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the first purpose of the application is to provide a sound wave mosquito repelling method, which is simple in operation process, free of manual operation of a user, time and energy of the user are saved, and user experience is improved.
A second object of the present application is to provide a sound wave mosquito repellent device.
A third object of the present application is to provide an air conditioner.
A fourth object of the present application is to propose a computer readable storage medium.
In order to achieve the above object, an embodiment of the first aspect of the present application provides a sound wave mosquito repelling method, including:
determining the position of a user;
and transmitting mosquito repelling sound waves to the position where the user is located.
According to the sound wave mosquito repelling method, the position of the user is determined at first, and then mosquito repelling sound waves are emitted to the position of the user. From this, realized carrying out the sound wave mosquito repellent according to user's position, operation process is simple, and need not user manual operation, has saved user's time and energy, has improved user experience.
In an embodiment of the present application, the determining the location of the user includes:
receiving an audio signal with a microphone array, the microphone array comprising n microphones, n being an integer greater than 1;
acquiring relative time difference of an audio signal reaching any two microphones in the n microphones according to the audio signal and a preset parameter, wherein the preset parameter is set according to the signal-to-noise ratio of the audio signal;
and positioning the audio signal according to the relative time difference of the audio signal reaching the two microphones and the positions of the two microphones so as to determine the position of the user.
In an embodiment of the application, before determining the location of the user, the method further includes:
and identifying the audio signal, and determining that the instruction corresponding to the audio signal is a mosquito repelling instruction.
After determining that the instruction corresponding to the audio signal is a mosquito repelling instruction, the method further comprises the following steps:
and returning a response message to the user.
In an embodiment of the application, the emitting mosquito repellent sound wave to the position where the user is located includes:
and adjusting the frequency of the mosquito repellent sound waves emitted to the position where the user is located according to the preset adjusting frequency.
In order to achieve the above object, a second embodiment of the present application provides a sound wave mosquito repelling device, including:
the first determining module is used for determining the position of the user;
and the control module is used for transmitting mosquito repelling sound waves to the position where the user is located.
The sound wave mosquito repellent device of the embodiment of the application firstly determines the position of a user, and then emits mosquito repellent sound waves to the position of the user. From this, realized carrying out the sound wave mosquito repellent according to user's position, operation process is simple, and need not user manual operation, has saved user's time and energy, has improved user experience.
In an embodiment of the application, the first determining module is specifically configured to:
receiving an audio signal with a microphone array, the microphone array comprising n microphones, n being an integer greater than 1;
acquiring relative time difference of an audio signal reaching any two microphones in the n microphones according to the audio signal and a preset parameter, wherein the preset parameter is set according to the signal-to-noise ratio of the audio signal;
and positioning the audio signal according to the relative time difference of the audio signal reaching the two microphones and the positions of the two microphones so as to determine the position of the user.
In an embodiment of the present application, the sound wave mosquito repellent device further includes:
and the second determining module is used for identifying the audio signal and determining that the instruction corresponding to the audio signal is a mosquito repelling instruction.
And the sending module is used for returning a response message to the user.
In an embodiment of the present application, the control module is specifically configured to:
and adjusting the frequency of the mosquito repellent sound waves emitted to the position where the user is located according to the preset adjusting frequency.
In order to achieve the above object, a third embodiment of the present invention provides an air conditioner, including the acoustic mosquito repelling device according to the second aspect.
The air conditioner provided by the embodiment of the application firstly determines the position of a user, and then emits mosquito repelling sound waves to the position of the user. From this, realized carrying out the sound wave mosquito repellent according to user's position, operation process is simple, and need not user manual operation, has saved user's time and energy, has improved user experience.
To achieve the above object, a fourth aspect of the present invention provides a computer-readable storage medium, on which a computer program is stored, which when executed by a processor implements the acoustic mosquito repelling method according to the first aspect.
The computer-readable storage medium provided by the embodiment of the application can be arranged in equipment which needs to repel mosquitoes through sound waves, when the equipment conducts sound wave mosquito repelling, the sound wave mosquito repelling can be conducted on the position where a user is located through executing the sound wave mosquito repelling method stored in the equipment, the operation process is simple, manual operation of the user is not needed, the time and the energy of the user are saved, and the user experience is improved.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic flow chart of a sound wave mosquito repelling method according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a sound source localization scenario according to one example of the present invention;
FIG. 3 is a schematic diagram of coordinates of sound source localization according to one example of the present invention;
FIG. 4 is a flow chart of a sound source localization method according to one embodiment of the present invention;
fig. 5 is a schematic flow chart of a sound wave mosquito repelling method according to another embodiment of the present application;
FIG. 6 is a schematic structural view of a sound wave mosquito repelling device according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of a sound wave mosquito repelling device according to another embodiment of the present application;
fig. 8 is a schematic structural view of an air conditioner according to an embodiment of the present application;
fig. 9 is a system architecture diagram of an air conditioner according to an embodiment of the present application.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.
The following describes the sound wave mosquito repelling method, device and air conditioner according to the embodiments of the present application with reference to the accompanying drawings.
The embodiment of the application aims at the problems that an existing electronic mosquito dispeller needs a user to manually arrange the direction of mosquito dispelling, the operation process is complex, the time and the energy of the user are consumed, and the user experience is poor, and the sound wave mosquito dispelling method is provided.
The sound wave mosquito repelling method provided by the embodiment of the invention can determine the position of the user, so that the mosquito repelling sound wave is emitted to the position of the user, the sound wave mosquito repelling is realized according to the position of the user, the operation process is simple, the manual operation of the user is not needed, the time and the energy of the user are saved, and the user experience is improved.
Fig. 1 is a schematic flow chart of a sound wave mosquito repelling method according to an embodiment of the present application.
As shown in fig. 1, the sound wave mosquito repelling method comprises the following steps:
The sound wave mosquito repelling method can be executed by the sound wave mosquito repelling device provided by the embodiment of the application. The sound wave mosquito repelling device can be arranged in any equipment such as an air conditioner, a fan and the like, so that the mosquito is repelled for users.
Specifically, the position of the user can be determined by various methods such as sound source positioning and GPS positioning. The following describes in detail a method for determining a location of a user through sound source localization according to an embodiment of the present invention with reference to fig. 2 to 4.
Accordingly, step 101 may include:
receiving an audio signal with a microphone array, the microphone array comprising n microphones, n being an integer greater than 1;
acquiring relative time difference of an audio signal reaching any two microphones in the n microphones according to the audio signal and a preset parameter, wherein the preset parameter is set according to the signal-to-noise ratio of the audio signal;
and positioning the audio signal according to the relative time difference of the audio signal reaching the two microphones and the positions of the two microphones so as to determine the position of the user.
The microphone array may be any topology such as a linear array, a circular array, a spherical array, and the like.
During specific implementation, a linear microphone array can be arranged in the sound wave mosquito repelling device, the microphones in the microphone array are all located on the same straight line, the distance between the adjacent microphones is a preset distance, and the orientation directions of the microphones are the same. The number of microphones in the microphone array may take on an integer greater than 1. For example, referring to fig. 2, a microphone array includes 4 microphones, each of which can receive a corresponding audio signal, and the relative positions of the microphones are predetermined and are not related to each other.
It will be appreciated that the audio signals received by the microphone array include speech signals and noise signals.
When the microphone array is installed on a household appliance, such as an air conditioner, a fan, etc., if a user needs to perform voice control on the household appliance, the audio signal received by the microphone array includes a voice signal input by the user, an ambient noise signal, a reverberation noise signal, etc. It can be understood that when the user performs voice control on the air conditioner in the indoor environment, the user may generate reflection noise by reflecting the sound emitted by the air conditioner or the fan, and the operation of the air conditioner, the fan, and other devices (such as a sound box, etc.) may also generate sound, which may form reverberation noise with the reflection noise.
In specific implementation, in the embodiment of the present application, a high-precision analog-to-digital conversion processing chip and a digital audio processing chip may also be included. After the n microphones in the microphone array respectively collect audio signals, the n microphones can respectively send analog audio signals to the high-precision analog-to-digital conversion processing chip, so that the high-precision analog-to-digital conversion processing chip can perform high-speed analog-to-digital conversion on multiple paths of analog audio signals and output multiple paths of digital audio signals. The digital audio processing chip can receive the digital audio signals and carry out noise elimination and echo elimination on the received multi-channel digital audio signals so as to improve the quality of audio data and more accurately determine the position of a user.
Specifically, the position of the user may be determined according to the audio signal received by the microphone array by any method, such as a beam forming method, a subspace-based method, or a delay estimation-based method.
In the following, a method based on time delay estimation is taken as an example, and a specific description is given to an implementation method for determining a location of a user according to an audio signal in the embodiment of the present application.
Specifically, after receiving the audio signal by using the microphone array, the relative time difference of the audio signal reaching any two microphones of the n microphones can be obtained according to the audio signal and the preset parameter, and then the audio signal is located according to the relative time difference of the audio signal reaching the two microphones and the positions of the two microphones, so as to determine the position of the user.
In the embodiment of the invention, the audio signal is considered to contain the ambient noise and the reverberation noise, so that the preset parameters are introduced when the relative time difference of the audio signal reaching any two microphones is calculated.
Optionally, the preset parameter may be set according to a signal-to-noise ratio of the audio signal, and when the signal-to-noise ratio is within a certain range, the preset parameter may be positively correlated with the signal-to-noise ratio, that is, the larger the signal-to-noise ratio is, the larger the value of the preset parameter is.
Specifically, a first audio signal and a second audio signal of a first microphone and a second microphone among n microphones are acquired, fourier transform is performed on the first audio signal and the second audio signal to generate a first fourier transform value and a second fourier transform value, and a relative time difference is generated according to the first fourier transform value, the second fourier transform value and a preset parameter.
Wherein the first microphone and the second microphone are any two microphones out of n microphones, for example, referring to fig. 2, the first microphone is microphone 1, and the second microphone is microphone 2.
In one example of the invention, a first audio signal x received by a microphone 1 is acquired1(t) and a second audio signal x received by the microphone 22(t) for the first audio signal x1(t) and a second audio signal x2(t) performing a Fourier transform to generate a first Fourier transform value X1(ω) and a second Fourier transform value X2(ω), and further the relative time difference can be generated by the following equation (1):
wherein R is12(τ) peak position is relative time difference, #12(ω) is a generalized cross-correlation weighting function, G12(ω) is a cross-power spectrum between the first Fourier transform value and the second Fourier transform value, φ12(ω) is the generalized cross-correlation spectrum, where G12(ω)＝X1(ω)X2(ω)。
It should be noted that different weighting functions ψ may be selected when acquiring the relative time difference12(ω), e.g. basic cross-correlation function, ψ12(ω) 1; SCOT (Smooth Co-here Transform) weighting function,
CSP (Cross Power Spectrum Phase) weighting function,
and the like. It will be appreciated that different weighting functions may result in different relative time difference estimation algorithms, and that in conventional CSP algorithms, the CSP weighting function is selected, i.e. the CSP weighting function is selected
Further, the two microphones 1 and 2 with the distance d receive the audio signal x1(t)、x2(t) (without considering reverberation noise), as shown in equation (2):
xi(t)＝aiS(t-τi)+nie(t) (2)
the actual model (taking reverberation noise into account) is shown as equation (3):
xi(t)＝aiS(t-τi)+nie(t)+nir(t) (3)
wherein i is 1,2, s (t) is a sound source signal, aiIs an attenuation factor in the sound propagation process, tauiIs the time required for the sound source to reach microphone i, nie(t) is the ambient noise signal received by microphone i, nir(t) is the reverberant noise signal received by microphone i.
In an indoor environment, when a user performs voice control on a home appliance such as an air conditioner or a fan, multipath sound reflection is inevitably generated, and an audio signal synchronously reaching a microphone includes noise signals generated by operations of the home appliance itself and other devices.
From the ideal model of equation (2), the audio signals x received by the two microphones1(t)、x2(t) cross-power spectral function G12(ω) can be calculated by the following formula (4):
wherein N isie(omega) is an ambient noise signal nie(t) windowed Fourier transform, SiAnd (ω) is a fourier transform value of the sound source signal received by the microphone i.
Due to S (t), n1e(t)、n2e(t) Are uncorrelated with each other, and therefore, in the case of high signal-to-noise ratio, the above equation (4) can be simplified to equation (5):
cross power spectrum function G of audio signals received by two microphones when considering multi-path reflected noise of room12(ω) can be calculated by the following formula (6):
due to S (t), n1e(t)、n2e(t) are not related to each other, and therefore, the above formula (6) can be simplified to formula (7):
further, in case of high signal-to-noise ratio, due to Nir(ω) is small relative to S (ω), and the correlation between the two is also small, so equation (7) above can be approximated by equation (8) below:
however, in an actual home environment, when household appliances such as an air conditioner and an electric fan are operated, on one hand, due to changes of self states, various noises can be generated, such as changes of air volume and wind direction; on the other hand, when a user performs voice control on home appliances such as air conditioners and fans, multipath reflected sound, television sound, other human voice, rice cooking sound, and the like of voice often occur, that is, the last three items in equation (7) become relatively large and non-negligible because of the presence of large ambient noise and strong reverberation during the operation of the home appliances such as air conditioners and fans, and therefore, | G is used12(ω) | to approximate | S (ω) | non-calculation2Large errors can also occur so that the peak of the formula weighting function is no longer apparent, R in formula (1)12(τ)The peak value of (c) is no longer significant and thus greatly affects the performance of the conventional CSP algorithm without considering reverberation noise.
That is, in the conventional CSP algorithm, | G at high signal-to-noise ratio12(omega) | and | S (omega) | ventilation2The difference between the two is small, so that approximate replacement can be equivalently carried out, and the estimated time delay precision is high; under the condition of low signal-to-noise ratio, a larger difference value exists between the two components, the two components cannot be approximately replaced, and the | S (ω) | Y is not easy to replace along with the reduction of the signal-to-noise ratio2At | G12The proportion of (ω) | decreases.
In the embodiment of the invention, based on the traditional CSP algorithm, to ensure | S (omega) & gt ventilation2At | G12The proportion of (omega) I has certain stability, a preset parameter which changes along with the signal-to-noise ratio is introduced and is recorded as lambda2The size of the generalized cross-correlation weighting function is adjusted through the preset parameter, so that the influence of noise is reduced, and the anti-noise performance of the algorithm is improved.
Specifically, a preset parameter lambda is introduced into a generalized cross-correlation weighting function used by the traditional CSP algorithm2In the embodiment of the present invention, the generalized cross-correlation weighting function is represented by equation (9):
in one embodiment of the invention, 0.707 ≦ λ ≦ 1, λ2Amount that varies with the shift in signal-to-noise ratio, and2satisfies the following formula (10):
where σ denotes the signal-to-noise ratio, σ0、σ1、λ0、λ1Is a constant determined according to the actual situation, and1>λ0。
it will be appreciated that if λ is taken21, it is a traditional CSP algorithm.
Thus, based on the traditional CSP algorithm, the accompanying information is introducedPreset parameter lambda of noise ratio variation2And then, the method has stronger resistance to reverberation sound consisting of multi-path reflection noise of human voice, sound generated by the operation of equipment, noise generated by other equipment and the like in an indoor environment, realizes better capability of coping with the noise, and improves the calculation precision of the relative time difference (sound path difference) of an audio signal reaching two microphones, thereby being beneficial to improving the precision of sound source positioning and being beneficial to the voice recognition control of air-conditioning and fan household appliances.
Specifically, the audio signal can be located by the following equation (11):
||mi1-s||-||mi2-s||＝Δτic (11)
wherein, Δ τiIs the relative time difference of the audio signal arriving at any two microphones, namely R in formula (1)12Peak value of (τ), mi1、mi2Respectively, a position vector between any two microphones, s represents a sound source position vector, and c is the sound velocity under the current medium, for example, the propagation velocity of sound in the air is 340m/s under 1 standard atmospheric pressure and 15 ℃.
In one example of the present invention, the three-dimensional geometry of the positions of any two microphones and the sound source in the microphone array is shown in fig. 3, the microphone 1 and the microphone 2 are on the x-axis, the midpoint of the connecting line is the origin, and the time difference (i.e. the sound path difference) from the sound source to the two microphones is Δ τi。
As can be seen from equation (11), the position of the sound source is on a hyperboloid.
Referring to fig. 3, the spherical coordinates of the sound source S are (r, θ, Φ), and the transformation of the sound source, the microphone 1, and the microphone 2 into the rectangular coordinate system is:
s, mi1、mi2Substituting formula (11), and squaring both sides, can obtain:
when the sound field is far field, i.e. relatively far away from r,
approaching zero, then equation (12) can be approximated as:
it follows that the angle theta can be approximately found when the relative time difference of the arrival of the audio signal at any two microphones and the distance between the two microphones are known. When the sound source is a far-field sound source, the possible position of the sound source can be represented by a cone of an angle θ. Therefore, it is only necessary to obtain the acoustic path difference Δ τiThe direction angle of the sound source to the midpoint of the line connecting the arbitrary two microphones can be approximately found. That is, possible location planes of one sound source can be obtained by two microphones. Furthermore, by means of an array comprising n microphones, it is possible to obtain a plurality of planes of possible positions of the sound source, the focal points of these planes being the positions of the sound source.
In practice, the obtained sound source positions may not all intersect at a single point due to errors, and therefore, the estimated sound source position is obtained as long as the position closest to several planes is found.
In an embodiment of the present invention, after the audio signal received by the microphone array is acquired, a short-time fourier transform may be performed on the audio signal to generate a plurality of audio frequency domain values, and then a maximum value and/or a minimum value of the plurality of audio frequency domain values is compared with a threshold value to determine whether the audio signal is a speech signal, and if the audio signal is a speech signal, a noise magnitude spectrum is subtracted from a magnitude spectrum of the audio signal, where the threshold value may include a first threshold value and/or a second threshold value, and the first threshold value is smaller than the second threshold value.
Specifically, as shown in fig. 4, after each microphone in the microphone array receives one frame of audio signal X [ n ], a short-time fourier transform is performed on each frame of audio signal to obtain a plurality of audio frequency domain values X [ k, τ ], where n is 1,2,3, …, fLen, k is 1,2,3, …, fLen is a frame length of the audio signal, and τ is a time parameter of the short-time fourier transform.
Further, the judgment is made based on X [ k, τ ].
In one example of the invention, see FIG. 4, if the maximum value max among the plurality of audio frequency domain values1≤k≤fLen{X[k,τ]Is less than or equal to a first threshold value threshold1, max1≤k≤fLen{|X[k,τ]If | } is less than or equal to threshold1, the received audio signal is judged to be a noise signal, otherwise, the received audio signal is judged to be a voice signal.
In another example of the present invention, if the minimum value min of the plurality of audio frequency domain values is1≤k≤fLen{|X[k,τ]| is greater than or equal to a second threshold value threshold2, i.e. min1≤k≤fLen{|X[k,τ]If | } is larger than or equal to threshold2, the received audio signal is judged to be a noise signal, otherwise, the received audio signal is judged to be a voice signal.
In yet another example of the present invention, if the maximum value max among the plurality of audio frequency domain values1≤k≤fLen{|X[k,τ]| is greater than a first threshold value threshold1, i.e. max1≤k≤fLen{|X[k,τ]| } > threshold1, and the minimum value min of the plurality of audio frequency-domain values1≤k≤fLen{|X[k,τ]| is less than a second threshold value threshold2, i.e. min1≤k≤fLen{|X[k,τ]If | } < threshold2, the received audio signal is judged to be a voice signal, otherwise, the received audio signal is judged to be a noise signal.
That is, the audio signal corresponding to the audio frequency domain value exceeding the threshold value is not a speech signal. The threshold value may be set in advance empirically or may be determined by a specific environment. For example, when a user performs voice control on home appliances such as an air conditioner and a fan, the voice frequency is generally 200 to 1000Hz, and at this time, the first threshold value may be set to 200Hz, and the second threshold value may be set to 1000 Hz.
Further, referring to fig. 4, if it is determined that the audio signal is a noise signal, the value of the amplitude spectrum of the noise signal is updated so that the noise amplitude spectrum is always maintained as the nearest noise bias; if the audio signal is judged to be a voice signal, the amplitude spectrum of the received audio signal is subtracted by the noise amplitude spectrum in the frequency domain, namely, the current noise is simulated by the recent noise. Therefore, self-adaption environment is realized, background noise can be removed well under different noise environments, and the amplitude spectrum of the audio signal subjected to noise reduction is obtained.
In summary, according to the sound source localization method, when the relative time difference of the audio signal reaching any two microphones is obtained, a preset parameter is introduced, that is, the relative time difference of the audio signal reaching any two microphones in the plurality of microphones is obtained through the audio signal received by the microphone array and the preset parameter, and then the audio signal is localized according to the relative time difference of any two microphones and the positions of the two microphones. From this, can effectual self-adaptation reduce the ambient noise, have stronger adaptation resistance to reverberation and sound diffraction noise under the far field environment moreover, realize dual noise reduction effect, promoted the far field sound source identification precision based on array microphone by a wide margin, make the practicality of far field sound source identification strengthen greatly.
And 102, transmitting mosquito repelling sound waves to the position where the user is located.
It can be understood that the oscillation generated in the air by the ultrasonic wave can make the auditory nerve of the mosquito feel uncomfortable through the tentacle of the head of the mosquito, so that the mosquito tries to avoid the sound wave area. In addition, mosquitoes fly by means of wing vibration, the wing vibration causes air vibration, and ultrasonic oscillation caused by ultrasonic waves in the air can aggravate the air vibration, so that air resistance is increased, muscle burden is increased, the mosquitoes are difficult to tolerate and only escape.
Therefore, in the embodiment of the invention, after the position of the user is determined, the mosquito repelling sound wave can be emitted to the position of the user by utilizing the principle of ultrasonic mosquito repelling so as to repel the mosquitoes in the position of the user.
The mosquito repelling sound wave refers to a sound wave having one or more specific frequencies, and can repel mosquitoes out of a sound wave area by stimulating the nervous system, the muscular system and the like of the mosquitoes.
Specifically, since the auditory frequency range of human ears is 20HZ to 2 KHZ (20HZ-20KHZ), in the embodiment of the present invention, in order to avoid the mosquito repelling sound wave interfering with the normal rest of the user, the frequency of the mosquito repelling sound wave may be set in a frequency range outside the auditory range of human ears. For example, the frequency range of the mosquito repellent sound wave can be set to be greater than the range of more than 24KHz to avoid the influence of the mosquito repellent sound wave on a user.
In addition, in order to avoid the adaptability and immunity of mosquitoes to mosquito-repellent sound waves, in the embodiment of the invention, the frequency of the mosquito-repellent sound waves can be set to be constantly changed within a preset range. That is, step 102 may specifically include:
and adjusting the frequency of the mosquito repellent sound waves emitted to the position where the user is located according to the preset adjusting frequency. Thereby the frequency of the mosquito repelling sound wave is changed continuously.
Specifically, in the embodiment of the present invention, a control steering module and an ultrasonic wave emitting module including a clock pulse generator, a charge adjusting circuit, a multivibrator, a speaker or a buzzer may be provided. After the position of the user is determined, the control steering module can drive the motor or the motor to rotate to steer the ultrasonic wave sending module, so that the emission direction of the sound waves faces to the approximate direction of the user, and the ultrasonic wave emitting module can emit mosquito repellent sound waves to the position of the user. And by adjusting the frequency of the clock pulse and other methods, the frequency of the mosquito repelling sound wave can be adjusted, so that the mosquito is prevented from generating adaptability and immunity to the mosquito repelling sound wave with fixed frequency.
According to the sound wave mosquito repelling method provided by the embodiment of the invention, the position of the user is determined, and then mosquito repelling sound waves are emitted to the position of the user. From this, realized carrying out the sound wave mosquito repellent according to user's position, operation process is simple, and need not user manual operation, has saved user's time and energy, has improved user experience.
Through the analysis, the sound wave mosquito repelling can be carried out according to the position of the user, in practical application, the mosquito repelling sound wave can be emitted to the position of the user when the user sends a mosquito repelling instruction through voice, and the situation is specifically explained below by combining with the figure 5.
Fig. 5 is a schematic flow chart of a sound wave mosquito repelling method according to another embodiment of the present application.
As shown in fig. 5, the sound wave mosquito repelling method comprises the following steps:
Wherein the microphone array comprises n microphones, wherein n is a positive integer greater than 1.
And 505, transmitting mosquito repelling sound waves to the position where the user is located.
The specific implementation processes and principles of step 501, step 504, and step 505 may refer to the detailed descriptions of step 101 to step 102 in the foregoing embodiments, and are not described here again.
Specifically, after the audio signal received by the microphone array is acquired, the voice data corresponding to the audio signal may be input into the neural network model to determine the control instruction corresponding to the acquired audio signal.
Correspondingly, in the embodiment of the present invention, a training generation process of the neural network model may be further included. Specifically, a large amount of training speech data and corresponding control instructions may be utilized to train the neural network model. Therefore, after the voice data corresponding to the audio signal is input into the trained neural network model, whether the instruction corresponding to the audio signal is a mosquito repelling instruction or not can be determined by using the neural network model, and when the instruction is the mosquito repelling instruction, the position of the user is determined according to the voice instruction of the user, so that mosquito repelling sound waves are emitted to the position of the user.
Furthermore, keywords corresponding to the mosquito repellent instruction can be preset, so that after the audio signals collected by the microphone array are identified by using the neural network model, the identified text data can be matched with the preset keywords. And if the text data comprises preset keywords, determining that the audio signal is a mosquito repelling instruction, and determining the position of the user according to the voice instruction of the user so as to emit mosquito repelling sound waves to the position of the user.
It should be noted that, in this embodiment of the application, step 502 and step 504 may also be performed simultaneously, that is, after the audio signal received by the microphone array is acquired, on one hand, whether the corresponding instruction is a mosquito repellent instruction is determined according to the audio signal, and on the other hand, the position where the user is located is determined according to the voice instruction. And then, only when the instruction corresponding to the audio signal is a mosquito repelling instruction, sending the determined position of the user to a control steering module in the sound wave mosquito repelling device, so that the ultrasonic wave transmitting module transmits mosquito repelling sound waves to the position of the user. The instruction corresponding to the audio signal and the position of the user are determined according to the audio signal of the user, so that the efficiency of repelling mosquitoes by sound waves is improved.
In addition, after the user sends the audio signal to the sound wave mosquito repelling device, the user usually wants to know whether the operation is successful, and in the embodiment of the application, after the instruction corresponding to the audio signal is determined to be the mosquito repelling instruction, a response message can be returned to the user to prompt the user that the mosquito repelling operation is successful.
In addition, when the user does not need to use the equipment to repel mosquitoes, the sound wave mosquito repelling function of the equipment can be controlled to be turned off through voice, so that the energy consumption is reduced.
The sound wave mosquito repelling method comprises the steps of firstly obtaining audio signals received by a microphone array, then identifying the audio signals, determining that an instruction corresponding to the audio signals is a mosquito repelling instruction, returning a response message to a user, determining the position of the user according to the audio signals, and finally transmitting mosquito repelling sound waves to the position of the user. Therefore, the instruction of the user and the position of the user are determined according to the voice of the user, when the instruction is a mosquito repelling instruction, the sound wave mosquito repelling is carried out on the position of the user, the operation process is simple, manual operation of the user is not needed, the time and energy of the user are saved, and the user experience is improved.
In order to realize the embodiment, the application further provides a sound wave mosquito repelling device.
Fig. 6 is a schematic structural diagram of a sound wave mosquito repelling device according to an embodiment of the present application.
As shown in fig. 6, the sound wave mosquito repellent device comprises:
a first determining module 61, configured to determine a location where a user is located;
and the control module 62 is used for transmitting mosquito repellent sound waves to the position where the user is located.
Specifically, the sound wave mosquito repelling device provided by the embodiment of the invention can execute the sound wave mosquito repelling method provided by the embodiment of the invention. The sound wave mosquito repelling device can be arranged in any equipment such as an air conditioner, a fan and the like, so that the mosquito is repelled for users.
In a possible implementation form, the first determining module 61 is specifically configured to:
receiving an audio signal with a microphone array, the microphone array comprising n microphones, n being an integer greater than 1;
acquiring relative time difference of an audio signal reaching any two microphones in the n microphones according to the audio signal and a preset parameter, wherein the preset parameter is set according to the signal-to-noise ratio of the audio signal;
and positioning the audio signal according to the relative time difference of the audio signal reaching the two microphones and the positions of the two microphones so as to determine the position of the user.
In another possible implementation form, the control module 62 is specifically configured to:
and adjusting the frequency of the mosquito repellent sound waves emitted to the position where the user is located according to the preset adjusting frequency.
It should be noted that the explanation of the embodiment of the sound wave mosquito repelling method is also applicable to the sound wave mosquito repelling device of the embodiment, and details are not repeated here.
The sound wave mosquito repellent device of the embodiment of the application firstly determines the position of a user, and then emits mosquito repellent sound waves to the position of the user. From this, realized carrying out the sound wave mosquito repellent according to user's position, operation process is simple, and need not user manual operation, has saved user's time and energy, has improved user experience.
Fig. 7 is a schematic structural view of a sound wave mosquito repelling device according to another embodiment of the present application.
As shown in fig. 7, the sound wave mosquito repelling device may further include:
and the second determining module 71 is configured to identify the audio signal, and determine that the instruction corresponding to the audio signal is a mosquito repelling instruction.
A sending module 72, configured to return a response message to the user.
It should be noted that the explanation of the embodiment of the sound wave mosquito repelling method is also applicable to the sound wave mosquito repelling device of the embodiment, and details are not repeated here.
The sound wave mosquito repellent device provided by the embodiment of the application realizes that the instruction of the user and the position where the user is located are determined according to the voice of the user, so that when the instruction is a mosquito repellent instruction, sound wave mosquito repellent is carried out on the position where the user is located, the operation process is simple, manual operation of the user is not needed, the time and energy of the user are saved, and the user experience is improved.
In order to realize the above embodiments, the present application further provides an air conditioner.
Fig. 8 is a schematic structural diagram of an air conditioner according to an embodiment of the present application.
As shown in fig. 8, the air conditioner 80 includes the sound wave mosquito repelling device 81 as shown in fig. 6 or fig. 7.
It can be understood that, since the air conditioner or the fan-like device is generally used in a bedroom and the room space is small, the sound wave mosquito repellent device 81 has a better mosquito repellent effect than in a field environment by being arranged in the air conditioner 80 or the fan-like device to repel mosquitoes. In addition, the air conditioner 80 is a device needing air outlet, air flow is blown out by the air conditioner in the using process, the indoor air oscillates along with the change of wind power and wind direction, and meanwhile, the sound wave mosquito repelling device 81 is matched to emit mosquito repelling sound waves, so that the stimulation to mosquito muscle systems is increased, and the mosquito repelling effect is improved.
It should be noted that the foregoing explanation on the embodiment of the acoustic wave mosquito repelling method is also applicable to the air conditioner of this embodiment, and is not repeated here.
Specifically, the air conditioner 80 may employ the system architecture diagram shown in fig. 9.
As shown in fig. 9, the air conditioner 80 may include a voice broadcasting subsystem 91, a voice recognition subsystem 92, a microphone array subsystem 93, a sound source positioning subsystem 94, and a mosquito repelling control subsystem 95.
In a specific implementation, the microphone array subsystem 93 may collect an audio signal, and on one hand, send the audio signal to the speech recognition subsystem 92 for speech recognition, and on the other hand, send the audio signal to the sound source localization subsystem 94 for sound source localization.
After the voice recognition subsystem 92 performs voice recognition on the audio signal, if it is determined that the instruction corresponding to the audio signal is a mosquito repelling instruction, on one hand, a control signal can be sent to the voiceprint positioning subsystem 94, so that the sound source positioning subsystem 94 sends the positioning result to the mosquito repelling control subsystem 95; on one hand, the identified mosquito repelling instruction can be sent to the mosquito repelling control subsystem 95; on the other hand, a prompt instruction may be output to the voice playing subsystem 91, so that the voice broadcasting subsystem 91 prompts the user that the operation is successful.
The sound source positioning subsystem 94 determines the position of the user by signal processing according to the audio signal collected by the microphone array subsystem 93, and can send the positioning result to the mosquito repellent control subsystem 95 if receiving the control signal output by the voice recognition subsystem 92.
The mosquito repellent control subsystem 95 may include an ultrasonic emission module and a steering control module, and the steering control module may control the ultrasonic emission module to start emission or stop emission of mosquito repellent sound waves after receiving the positioning result sent by the sound source positioning subsystem 94, and drive the motor or the motor to rotate according to the positioning result sent by the sound source positioning subsystem 94, so as to steer the ultrasonic emission module and realize emission of mosquito repellent sound waves to the position where the user is located.
The air conditioner provided by the embodiment of the application firstly determines the position of a user, and then emits mosquito repelling sound waves to the position of the user. Therefore, the sound wave mosquito repelling is carried out for the position where the user is located, the operation process is simple, manual operation of the user is not needed, the time and the energy of the user are saved, and the user experience is improved.
To achieve the above object, a fourth aspect of the present invention provides a computer-readable storage medium, on which a computer program is stored, which when executed by a processor implements the acoustic mosquito repelling method as in the previous embodiments.
The computer-readable storage medium provided by the embodiment of the application can be arranged in equipment which needs to repel mosquitoes through sound waves, when the equipment conducts sound wave mosquito repelling, the sound wave mosquito repelling can be conducted on the position where a user is located through executing the sound wave mosquito repelling method stored in the equipment, the operation process is simple, manual operation of the user is not needed, the time and the energy of the user are saved, and the user experience is improved.
To achieve the above object, a fifth embodiment of the present invention provides a computer program product, which when executed by an instruction processor in the computer program product, performs the sound wave mosquito repelling method as in the foregoing embodiments.
The computer program product provided by the embodiment of the application can be written into equipment which needs to be subjected to mosquito repelling through sound waves, when the equipment is subjected to sound wave mosquito repelling, the sound wave mosquito repelling can be carried out for the position where a user is located through executing a program corresponding to the sound wave mosquito repelling method, the operation process is simple, manual operation of the user is not needed, the time and the energy of the user are saved, and the user experience is improved.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (6)
1. A sound wave mosquito repelling method is characterized by comprising the following steps:
receiving an audio signal with a microphone array, the microphone array comprising n microphones, n being an integer greater than 1;
acquiring relative time difference of an audio signal reaching any two microphones in the n microphones according to the audio signal and preset parameters, wherein the audio signal comprises a voice signal and a noise signal, and the preset parameters are set according to the signal-to-noise ratio of the audio signal;
positioning the audio signal according to the relative time difference of the audio signal reaching the two microphones and the positions of the two microphones so as to determine the position of the user;
with preset adjusting frequency, the adjustment to the mosquito repellent sound wave frequency of the position transmission of user place, mosquito repellent sound wave frequency is in presetting the within range change, through the frequency of adjustment clock pulse, the adjustment mosquito repellent sound wave frequency, wherein, acquireing the microphone array is received after the audio signal, still include:
performing a short-time Fourier transform on the audio signal to generate a plurality of audio frequency-domain values; comparing the maximum value and the minimum value of the plurality of audio frequency domain values with a threshold value to judge whether the audio signal is a voice signal, wherein the threshold value comprises a first threshold value and a second threshold value, and the first threshold value is smaller than the second threshold value;
if the maximum value in the plurality of audio frequency domain values is larger than the first threshold value and the minimum value is smaller than the second threshold value, judging that the audio signal is a voice signal, and subtracting a noise amplitude spectrum from the amplitude spectrum of the audio signal;
and if the maximum value of the plurality of audio frequency domain values is less than or equal to the first threshold value or the minimum value of the plurality of audio frequency domain values is greater than or equal to the second threshold value, judging the audio signal to be a noise signal, and updating the noise amplitude spectrum to enable the noise amplitude spectrum to be the nearest noise offset.
2. The method of claim 1, wherein prior to determining the location of the user, further comprising:
identifying the audio signal, determining that the instruction corresponding to the audio signal is a mosquito repelling instruction,
after determining that the instruction corresponding to the audio signal is a mosquito repelling instruction, the method further comprises the following steps:
and returning a response message to the user.
3. An acoustic mosquito repellent device, wherein the acoustic mosquito repellent device is adapted to perform the acoustic mosquito repellent method of claim 1 or 2, and the acoustic mosquito repellent device comprises:
a first determining module for receiving an audio signal with a microphone array, the microphone array comprising n microphones, n being an integer greater than 1; acquiring relative time difference of an audio signal reaching any two microphones in the n microphones according to the audio signal and a preset parameter, wherein the preset parameter is set according to the signal-to-noise ratio of the audio signal; positioning the audio signal according to the relative time difference of the audio signal reaching the two microphones and the positions of the two microphones so as to determine the position of the user;
and the control module is used for adjusting the frequency of the mosquito repellent sound waves emitted to the position where the user is located according to the preset adjusting frequency, wherein the frequency of the mosquito repellent sound waves changes within the preset range, and the frequency of the mosquito repellent sound waves is adjusted by adjusting the frequency of the clock pulses.
4. The apparatus of claim 3, further comprising:
the second determining module is used for identifying the audio signal and determining that the instruction corresponding to the audio signal is a mosquito repelling instruction;
and the sending module is used for returning a response message to the user.
5. An air conditioner characterized by comprising the acoustic mosquito repellent device of claim 3 or 4.
6. A computer-readable storage medium on which a computer program is stored, the program, when executed by a processor, implementing the acoustic mosquito repellent method of claim 1 or 2.
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| CN201710482779.9A CN107202385B (en) | 2017-06-22 | 2017-06-22 | Sound wave mosquito repelling method and device and air conditioner |
| PCT/CN2017/104905 WO2018188287A1 (en) | 2017-04-11 | 2017-09-30 | A voice control method and apparatus, and household appliance device |
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| CN201710482779.9A CN107202385B (en) | 2017-06-22 | 2017-06-22 | Sound wave mosquito repelling method and device and air conditioner |
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| WO2018188287A1 (en) * | 2017-04-11 | 2018-10-18 | 广东美的制冷设备有限公司 | A voice control method and apparatus, and household appliance device |
| CN107845388B (en) * | 2017-12-25 | 2021-06-01 | 青岛海信移动通信技术股份有限公司 | Voice recognition method and device |
| CN108592166B (en) * | 2018-03-20 | 2020-07-28 | 浙江万物工场智能科技有限公司 | Intelligent heating method and intelligent equipment |
| CN108703432A (en) * | 2018-06-20 | 2018-10-26 | 中国地质大学（武汉） | A kind of ultrasonic mosquito dispelling safety cap based on NB-IoT networks |
| CN109006797B (en) * | 2018-07-25 | 2021-02-26 | 厦门大学 | Intelligent sound wave directional mosquito dispeller |
| CN109631264A (en) * | 2018-12-10 | 2019-04-16 | 珠海格力电器股份有限公司 | Air conditioner control method and device, storage medium and terminal |
| CN111972394B (en) * | 2020-06-11 | 2022-01-21 | 广东电网有限责任公司 | DQN-based selection method for optimal frequency of ultrasonic bird repelling |
| CN115076857A (en) * | 2022-05-11 | 2022-09-20 | 青岛海尔空调器有限总公司 | Air conditioner control method and device |
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