A mine filling slurry concentration detection method, device and system

Abstract

The present application relates to the technical field of slurry concentration detection, and particularly relates to a mine filling slurry concentration detection method, device and system. According to the time domain distribution of the frequency domain amplitude of each frequency in the spectrum diagram in the ultrasonic echo signal, the particle size of each frequency domain amplitude and whether the dominant frequency needs to be adjusted are obtained. If it is judged that the dominant frequency needs to be adjusted, the new dominant frequency of each frequency domain amplitude is obtained according to the dominant frequency and the particle size mismatch of the sound wave. According to the particle and the sound wave mismatch of each frequency domain amplitude, and the ultrasonic wave transmission distance, the new ultrasonic wave transmission distance of each frequency domain amplitude is obtained. The new ultrasonic echo signal is obtained. Until it is judged that the dominant frequency of each frequency domain amplitude does not need to be adjusted, the optimal dominant frequency of each frequency domain amplitude is obtained. The concentration of the filling slurry is detected. The present application improves the accuracy of the filling slurry concentration detection by analyzing the effective dominant frequency corresponding to the particle size corresponding to each frequency amplitude.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of slurry concentration detection, and particularly relates to a mine filling slurry concentration detection method, device and system. BACKGROUND

[0002] The rheological properties of the filling slurry can reflect its fluidity and homogenization degree; in the stirring and shearing process, the rheological properties of the filling slurry are affected by multiple factors, including the size of the particles, the concentration of the slurry and the intensity of the shearing action; the characteristics and application scenarios of the slurry of different concentrations are different, and when the concentration deviates slightly, the rheological properties will change greatly, therefore, the concentration of the slurry needs to be detected.

[0003] The prior art, the concentration detection method based on ultrasonic technology, obtains the sand content by analyzing the ultrasonic signal of the filling material particles and the scattering intensity of the received ultrasonic scattering signal; but for the mine filling raw material mining tailings, the particle sizes of the tailings produced by mining are quite different, and the large particle tailings will block the ultrasonic scattering wave of the small particle tailings, resulting in that the echo signal intensity of the small particles in the ultrasonic wave of a single dominant frequency is too weak, and the accuracy of the concentration detection is poor. SUMMARY

[0004] In order to solve the technical problem that the particle sizes of the tailings produced by mining are quite different, and the large particle tailings will block the ultrasonic scattering wave of the small particle tailings, and the accuracy of the ultrasonic concentration detection is poor, the purpose of the present application is to provide a mine filling slurry concentration detection method, device and system, and the technical solution adopted is as follows:

[0005] The present application provides a mine filling slurry concentration detection method, which comprises:

[0006] Based on the mine filling slurry concentration detection device, the ultrasonic echo signal of the particles of different particle sizes in the filling slurry at the center dominant frequency of the preset ultrasonic wave emission distance is obtained, and the frequency spectrum diagram of the ultrasonic echo signal is obtained; the frequency spectrum diagram includes the frequency domain amplitude at different frequencies;

[0007] According to the time domain distribution of the frequency domain amplitude at each frequency in the frequency spectrum diagram in the ultrasonic echo signal, the particle size and the acoustic mismatch of each frequency domain amplitude are obtained.

[0008] According to the particle size and the acoustic mismatch of each frequency domain amplitude, it is judged whether the dominant frequency needs to be adjusted, if it is judged that the dominant frequency needs to be adjusted, according to the dominant frequency and the particle size and the acoustic mismatch of each frequency domain amplitude, a new dominant frequency of each frequency domain amplitude is obtained; according to the particle size and the acoustic mismatch of each frequency domain amplitude and the ultrasonic wave emission distance, a new ultrasonic wave emission distance of each frequency domain amplitude is obtained; according to the new dominant frequency and the ultrasonic wave emission distance, a new ultrasonic echo signal is obtained; until it is judged that the dominant frequency does not need to be adjusted under each frequency domain amplitude, the dominant optimal frequency of each frequency domain amplitude is obtained.

[0009] According to the dominant optimal frequency of different frequency domain amplitudes and the characteristics of the corresponding ultrasonic echo signal, the concentration of the filling slurry is detected.

[0010] Further, the method for obtaining the particle size and the acoustic mismatch includes:

[0011] According to the time domain distribution of the frequency domain amplitude of each frequency in the frequency spectrum in the ultrasonic echo signal, the low dominant frequency mismatch and the high dominant frequency mismatch of each frequency domain amplitude are obtained;

[0012] If the low dominant frequency mismatch of each frequency domain amplitude is greater than the corresponding high dominant frequency mismatch, the low dominant frequency mismatch corresponding to each frequency domain amplitude is taken as the particle size and the acoustic mismatch of each frequency domain amplitude;

[0013] If the low dominant frequency mismatch of each frequency domain amplitude is equal to the corresponding high dominant frequency mismatch, the particle size and the acoustic mismatch of each frequency domain amplitude is set to 0;

[0014] If the low dominant frequency mismatch of each frequency domain amplitude is less than the corresponding high dominant frequency mismatch, the opposite number of the high dominant frequency mismatch corresponding to each frequency domain amplitude is taken as the particle size and the acoustic mismatch of each frequency domain amplitude.

[0015] Further, the method for obtaining the low dominant frequency mismatch includes:

[0016] The ultrasonic echo signal includes time domain amplitudes at different time points; the reconstructed signal of the frequency domain amplitude of each frequency in the frequency spectrum in the time domain of the ultrasonic echo signal is obtained, if the reconstructed signal and the time domain amplitude at any time point in the ultrasonic echo signal are both peak points or both valley points, the corresponding time point is taken as the dominant time point;

[0017] The mean value of the absolute values of the time domain amplitudes of all dominant time points in the ultrasonic echo signal is taken as the dominant amplitude; the mean value of the absolute values of the amplitudes of other time points except all dominant time points is taken as the contrast amplitude;

[0018] The difference between the dominant amplitude and the contrast amplitude is obtained, and negative correlation normalization mapping is performed as the low dominant frequency mismatch degree of each frequency domain amplitude.

[0019] Further, the method for obtaining the high dominant frequency mismatch degree comprises:

[0020] For any peak-valley point in the reconstructed signal, if the peak-valley point and the previous peak-valley point in the ultrasonic echo signal before the corresponding time are of the same type, the time corresponding to the previous peak-valley point is taken as the overshoot judgment time of each frequency domain amplitude.

[0021] The difference between the time domain amplitude of each overshoot judgment time inscribed in the ultrasonic echo signal and the mean value of all peak values is obtained, if the difference is greater than or equal to 0, the overshoot performance degree corresponding to the overshoot judgment time is the difference, if the difference is less than 0, the corresponding overshoot performance degree is set to 0.

[0022] The difference between the time domain amplitude of each overshoot judgment time inscribed in the ultrasonic echo signal and the mean value of all valley values is obtained, if the difference is less than or equal to 0, the undershoot performance degree corresponding to the overshoot judgment time is the difference, if the difference is greater than 0, the corresponding undershoot performance degree is set to 0.

[0023] The cumulative sum of all overshoot performance degrees and undershoot performance degrees of each frequency domain amplitude is obtained, and normalized as the high dominant frequency mismatch degree of each frequency domain amplitude.

[0024] Further, the method for judging whether the dominant frequency needs to be adjusted according to the particle diameter and the sound wave mismatch of each frequency domain amplitude comprises:

[0025] If the particle diameter and the sound wave mismatch of each frequency domain amplitude are less than or equal to a preset effective threshold, the dominant frequency does not need to be adjusted at the corresponding frequency domain amplitude.

[0026] Further, the dominant frequency and the particle diameter and the sound wave mismatch of each frequency domain amplitude are positively correlated with the new dominant frequency.

[0027] Further, the particle diameter and the sound wave mismatch are positively correlated with the new ultrasonic wave transmission distance, and the ultrasonic wave transmission distance is negatively correlated with the new ultrasonic wave transmission distance.

[0028] Further, the function is used for normalization.

[0029] The application further provides a mine filling slurry concentration detection device, which comprises a controller, an ultrasonic transmitting transducer and an ultrasonic receiving transducer which are signal-connected with the controller, the ultrasonic transmitting transducer is used for transmitting ultrasonic signals of a preset dominant frequency, and the ultrasonic receiving transducer is used for receiving ultrasonic echo signals, and the control method of the controller comprises: ​

[0030] Obtaining the ultrasonic echo signals of particles with different diameters in the filling slurry at the center dominant frequency of a preset ultrasonic emission distance, and obtaining a spectrum diagram of the ultrasonic echo signals; the spectrum diagram includes frequency domain amplitudes at different frequencies;

[0031] According to the time domain distribution of the frequency domain amplitude at each frequency in the spectrum diagram in the ultrasonic echo signal, the particle diameter and the acoustic wave mismatch of each frequency domain amplitude are obtained.

[0032] According to the particle diameter and the acoustic wave mismatch of each frequency domain amplitude, it is judged whether the dominant frequency needs to be adjusted, if it is judged that the dominant frequency needs to be adjusted, the new dominant frequency of each frequency domain amplitude is obtained according to the dominant frequency and the particle diameter and the acoustic wave mismatch of each frequency domain amplitude; the new ultrasonic emission distance of each frequency domain amplitude is obtained according to the particle diameter and the acoustic wave mismatch of each frequency domain amplitude and the ultrasonic emission distance; the new ultrasonic echo signal is obtained according to the new dominant frequency and the ultrasonic emission distance; until it is judged that the dominant frequency does not need to be adjusted at each frequency domain amplitude, the dominant optimal frequency of each frequency domain amplitude is obtained.

[0033] According to the dominant optimal frequency of different frequency domain amplitudes and the characteristics of the corresponding ultrasonic echo signals, the concentration of the filling slurry is detected.

[0034] The application further provides a mine filling slurry concentration detection system, which stores programs or instructions, and the programs or instructions are executed by a processor to realize the steps of any one of the mine filling slurry concentration detection methods.

[0035] The application has the following beneficial effects:

[0036] The present application obtains the particle size and the acoustic mismatch of each frequency domain amplitude according to the time domain distribution of the frequency domain amplitude of each frequency in the spectrum in the ultrasonic echo signal, and deeply understands the interaction between the ultrasonic wave and the particle size in the filling slurry; determines whether the dominant frequency needs to be adjusted according to the particle size and the acoustic mismatch of each frequency domain amplitude, and determines whether the dominant frequency needs to be adjusted by judging the particle size and the acoustic mismatch, so as to ensure that the dominant frequency matches the particle size characteristics of the particles in the filling slurry. If it is determined that the dominant frequency needs to be adjusted, a new dominant frequency of each frequency domain amplitude is obtained according to the dominant frequency and the particle size acoustic mismatch of each frequency domain amplitude. The appropriate dominant frequency can more accurately capture the related information of the particles in the filling slurry and more specifically interact with particles of different particle sizes. According to the particle and acoustic mismatch of each frequency domain amplitude and the ultrasonic wave transmission distance, a new ultrasonic wave transmission distance of each frequency domain amplitude is obtained to ensure that the ultrasonic echo signal has appropriate strength and quality in the filling slurry with different particle size distributions. The new ultrasonic echo signal obtained after optimization and adjustment contains more accurate and rich information of the filling slurry characteristics. Until it is determined that the dominant frequency of each frequency domain amplitude does not need to be adjusted, the dominant optimal frequency of each frequency domain amplitude is obtained, which is helpful to make the frequency parameter of the ultrasonic detection system reach the best performance for the current filling slurry characteristics. The concentration of the filling slurry is detected. The present application improves the accuracy of the concentration detection of the filling slurry by analyzing the effective dominant frequency corresponding to the particle size corresponding to each frequency amplitude. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, and the advantages thereof, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0038] Figure 1 A flowchart of a mine filling slurry concentration detection method provided by an embodiment of the present application;

[0039] Figure 2 A flowchart of a low dominant frequency mismatch degree acquisition method provided by an embodiment of the present application. DETAILED DESCRIPTION

[0040] In order to further illustrate the technical means and effects taken by the present application to achieve the predetermined inventive purpose, the specific implementation, structure, features and effects of the mine filling slurry concentration detection method, device and system according to the present application are described in detail as follows in combination with the drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. In addition, the specific features, structures or characteristics in one or more embodiments can be combined in any suitable form.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0042] The specific scheme of the mine filling slurry concentration detection method, device and system provided by the present application is specifically described below in combination with the drawings.

[0043] Please refer to Figure 1 which shows the flowchart of the mine filling slurry concentration detection method provided by one embodiment of the present application, and the specific method includes:

[0044] Step S1: Based on the mine filling slurry concentration detection device, the ultrasonic echo signal of different particle sizes in the filling slurry at the center dominant frequency of the preset ultrasonic emission distance is obtained, and the frequency spectrum of the ultrasonic echo signal is obtained; the frequency spectrum includes the frequency domain amplitude at different frequencies.

[0045] In the embodiments of the present application, in order to accurately detect the concentration of the filling slurry, the change of the filling material particles at the dominant frequency of the ultrasonic echo signal needs to be analyzed; first, the core component of the mine filling slurry concentration detection device is a sample pool, which is composed of three sample pool side plates, a sample pool bottom plate and a movable plate. The movable plate is vertically installed in the middle of the two side plates placed horizontally, the ultrasonic emission transducer is installed in the direction towards the sample pool, the ultrasonic receiving transducer is installed on the opposite sample pool side plate of the movable side plate, the ultrasonic emission distance between the ultrasonic emission transducer and the ultrasonic receiving transducer can be adjusted by moving the movable side plate, the sample of the filling slurry is injected into the sample pool, the ultrasonic wave of the preset center dominant frequency is emitted by the ultrasonic emission transducer at the preset ultrasonic emission distance for measurement, the ultrasonic receiving transducer receives, the ultrasonic echo signal is obtained, including the time domain amplitude at different time, the frequency spectrum of the ultrasonic echo signal is obtained, including the frequency domain amplitude at different frequencies;

[0046] It should be noted that in one embodiment of the present application, the preset dominant frequency is set to 5mhz, the ultrasonic transmission distance is 1m, that is, the distance between the ultrasonic transmitting transducer and the ultrasonic receiving transducer is 1m, and the slurry injection ratio is 80% for analysis; the ultrasonic echo signal is converted into a frequency spectrum by Fourier transform; the specific Fourier transform is a technical means familiar to those skilled in the art, which will not be repeated here.

[0047] Step S2: According to the time domain distribution of the frequency domain amplitude of each frequency in the frequency spectrum in the ultrasonic echo signal, the particle size and the acoustic mismatch of each frequency domain amplitude are obtained.

[0048] In the slurry, the same particle size encounters the echo signal frequency generated by the ultrasonic pulse, which is consistent. For each peak value in the ultrasonic echo signal, the corresponding frequency is the superposition of the echo signals of all particles of a certain particle size in the medium; according to the time domain distribution of the frequency domain amplitude of each frequency in the frequency spectrum in the ultrasonic echo signal, the particle size and the acoustic mismatch of each frequency domain amplitude are obtained.

[0049] Preferably, in one embodiment of the present application, the particle size and the acoustic mismatch obtaining method comprises:

[0050] According to the time domain distribution of the frequency domain amplitude of each frequency in the frequency spectrum in the ultrasonic echo signal, the low dominant frequency mismatch degree and the high dominant frequency mismatch degree of each frequency domain amplitude are obtained.

[0051] The signal intensity corresponding to the peak value is a comprehensive reflection of the echo intensity of multiple particle sizes. By analyzing the time domain distribution of the frequency domain amplitude of each frequency in the frequency spectrum in the ultrasonic echo signal, the matching of the dominant frequency of the ultrasonic wave can be analyzed.

[0052] Preferably, considering that the active frequency is too small, the echo signal intensity is weaker, it is easier to produce signal loss, and the amplitude of the corresponding moment is lower than that of other moments. In one embodiment of the present application, the low dominant frequency mismatch degree obtaining method is described in Figure 2 , which shows a low dominant frequency mismatch degree obtaining method flowchart, comprising:

[0053] Step S201: The ultrasonic echo signal includes time domain amplitudes at different moments; the reconstructed signal of the frequency domain amplitude of each frequency in the frequency spectrum in the time domain of the ultrasonic echo signal is obtained, if the reconstructed signal and the time domain amplitude in the ultrasonic echo signal at any moment are peak points or valley points, the corresponding moment is taken as the dominant moment.

[0054] To more intuitively understand the performance of frequency domain amplitude in the time domain and its correlation with ultrasonic echo signals, the reconstructed signal of frequency domain amplitude in the time domain is obtained. Among them, peak points and valley points represent important characteristics of the signal. By comparing the time domain amplitude of the reconstructed signal and the original ultrasonic echo signal at each moment, the moments that are both peak points or both valley points may be closely related to the important characteristics of the signal at a specific frequency, which can help to better understand the signal characteristics.

[0055] Step S202: Obtain the mean of the absolute values ​​of the time-domain amplitudes at all dominant moments in the ultrasonic echo signal, as the dominant amplitude; obtain the mean of the absolute values ​​of the amplitudes at other moments besides the dominant moments, as the comparison amplitudes.

[0056] The dominant moment is considered to be a moment with important characteristics in a signal, and its time-domain amplitude may reflect key information of the signal at a specific frequency. In addition to the dominant moment, the amplitudes of other moments also contain some information of the signal. By calculating the dominant amplitude and comparing the amplitudes, the difference in amplitude characteristics between the dominant moment and other moments can be seen intuitively, thus highlighting the importance of the dominant moment in the signal.

[0057] Step S203: Obtain the difference between the dominant amplitude and the contrast amplitude, and perform negative correlation normalization mapping as the low dominant frequency mismatch degree of each frequency domain amplitude.

[0058] A larger dominant amplitude may mean that the frequency has a more obvious performance at the dominant moment, while the larger the amplitude at other times relative to the overall signal, the more well the signal characteristics of each frequency domain amplitude are matched at the dominant frequency, and the smaller the mismatch at lower dominant frequencies.

[0059] In one embodiment of the present invention, the formula for low dominant frequency mismatch is expressed as:

[0060] ;

[0061] in, Indicates the first The low dominant frequency of the individual frequency domain amplitude is mismatched; Indicates the first The dominant amplitude is the mean of the absolute values ​​of the time-domain amplitudes of all dominant moments of a frequency domain amplitude in the ultrasonic echo signal. Indicates except the first The mean of the absolute values ​​of the time-domain amplitude in the ultrasonic echo signal at all times other than all dominant moments of the frequency domain amplitude, i.e., the contrast amplitude; This represents the logical stith function.

[0062] In the formula for low dominant frequency mismatch, through Will Perform negative correlation normalization mapping. represents the difference between the dominant amplitude and the contrast amplitude, the greater the difference, the greater the time-domain amplitude corresponding to the dominant moment, the more reliable the generated ultrasonic echo signal, and the smaller the low dominant frequency mismatch; the smaller the difference, the more negative, the smaller the time-domain amplitude corresponding to the dominant moment, the less reliable the generated ultrasonic echo signal, and the more mismatched the corresponding dominant frequency.

[0063] Preferably, considering that when the dominant frequency is too large, the echo signal strength oscillates, the signal peak value is more obvious than or lower than the expected steady value, and the reverse peak deviation occurs after passing the steady value, in an embodiment of the present application, the method for obtaining the high dominant frequency mismatch degree comprises:

[0064] For any peak-valley point in the reconstructed signal, if the peak-valley point and the previous peak-valley point in the ultrasonic echo signal before the corresponding moment are of the same type, the previous peak-valley point corresponding moment is taken as the overshoot judgment moment of each frequency domain amplitude;

[0065] The difference between the time-domain amplitude of each overshoot judgment moment inscribed in the ultrasonic echo signal and the mean of all peak values is obtained, if the difference is greater than or equal to 0, the overshoot performance degree of the corresponding overshoot judgment moment is the difference, if the difference is less than 0, the corresponding overshoot performance degree is set to 0;

[0066] The difference between the time-domain amplitude of each overshoot judgment moment inscribed in the ultrasonic echo signal and the mean of all valley values is obtained, if the difference is less than or equal to 0, the undershoot performance degree of the corresponding overshoot judgment moment is the difference, if the difference is greater than 0, the corresponding undershoot performance degree is set to 0;

[0067] The cumulative sum of all overshoot performance degrees and undershoot performance degrees of each frequency domain amplitude is obtained and normalized as the high dominant frequency mismatch degree of each frequency domain amplitude.

[0068] For particles of the same particle size, the dominant frequency is low or high only at the same time, so compare the low dominant frequency mismatch degree and the high dominant frequency mismatch degree, the greater the corresponding value, the more the particle size and the acoustic wave mismatch performance related characteristics; the greater the low dominant frequency mismatch degree, the more the frequency needs to be increased, the greater the positive deviation of the particle size and the acoustic wave mismatch; the greater the high dominant frequency mismatch degree, the more the frequency needs to be reduced, the greater the negative deviation of the particle size and the acoustic wave mismatch.

[0069] If the low dominant frequency mismatch degree under each frequency domain amplitude is greater than the corresponding high dominant frequency mismatch degree, the low dominant frequency mismatch degree under each frequency domain amplitude is taken as the particle size and acoustic wave mismatch of each frequency domain amplitude;

[0070] If the low dominant frequency mismatch degree under each frequency domain amplitude is equal to the corresponding high dominant frequency mismatch degree, the particle size and acoustic wave mismatch of each frequency domain amplitude is set to 0.

[0071] If the low dominant frequency mismatch degree under each frequency domain amplitude is less than the corresponding high dominant frequency mismatch degree, the inverse of the high dominant frequency mismatch degree corresponding to each frequency domain amplitude is taken as the particle diameter and sound wave mismatch degree of each frequency domain amplitude.

[0072] Step S3: judging whether the dominant frequency needs to be adjusted according to the particle diameter and sound wave mismatch degree of each frequency domain amplitude, if it is judged that the dominant frequency needs to be adjusted, obtaining a new dominant frequency of each frequency domain amplitude according to the dominant frequency and the particle diameter and sound wave mismatch degree of each frequency domain amplitude; obtaining a new ultrasonic wave transmission distance of each frequency domain amplitude according to the particle diameter and sound wave mismatch degree of each frequency domain amplitude and the ultrasonic wave transmission distance; obtaining a new ultrasonic echo signal according to the new dominant frequency and the ultrasonic wave transmission distance; until it is judged that the dominant frequency does not need to be adjusted under each frequency domain amplitude, the optimal dominant frequency is obtained.

[0073] The particle diameter and sound wave mismatch degree reflects the mismatch relationship between the particle diameter on the particle and the sound wave, and the dominant frequency is adjusted appropriately through the analysis of the mismatch degree.

[0074] Preferably, in an embodiment of the present application, the method for judging whether the dominant frequency needs to be adjusted according to the particle diameter and sound wave mismatch degree of each frequency domain amplitude comprises:

[0075] If the particle diameter and sound wave mismatch degree of each frequency domain amplitude is less than or equal to a preset effective threshold value, the dominant frequency under the corresponding frequency domain amplitude does not need to be adjusted, otherwise, the corresponding dominant frequency needs to be adjusted.

[0076] It should be noted that, in an embodiment of the present application, the size of the preset effective threshold value is 0.3; in other embodiments of the present application, the size of the preset effective threshold value is a technical means familiar to those skilled in the art, which is not limited and described here.

[0077] The interaction efficiency of the particle and the dominant frequency is affected by the particle diameter and sound wave mismatch degree, the dominant frequency is adaptively optimized by analyzing the dominant frequency-particle diameter mismatch degree and dynamically adjusting the frequency domain amplitude weight, and the limitation of the experience preset frequency is avoided. If it is judged that the dominant frequency needs to be adjusted, a new dominant frequency of each frequency domain amplitude is obtained according to the dominant frequency and the particle diameter and sound wave mismatch degree of each frequency domain amplitude.

[0078] Preferably, in an embodiment of the present application, the dominant frequency and the particle size-acoustic wave mismatch of each frequency domain amplitude are positively correlated with the new dominant frequency. In an embodiment of the present application, for each frequency domain amplitude, the sum of the corresponding particle size-acoustic wave mismatch and the positive integer 1 is calculated as the adjustment weight; the product of the adjustment weight and the dominant frequency of each frequency domain amplitude is obtained as the new dominant frequency of each frequency domain amplitude; thus, the positive correlation between the dominant frequency and the particle size-acoustic wave mismatch of each frequency domain amplitude and the new dominant frequency is reflected, that is, the greater the dominant frequency, the greater the particle-acoustic wave mismatch, and the greater the dominant frequency needs to be adjusted; the smaller the particle-acoustic wave mismatch, the smaller the dominant frequency needs to be adjusted.

[0079] Preferably, considering that in an embodiment of the present application, the particle-acoustic wave mismatch is negatively correlated with the new ultrasonic wave transmission distance, the ultrasonic wave transmission distance is positively correlated with the new ultrasonic wave transmission distance.

[0080] In an embodiment of the present application, if the particle size-acoustic wave mismatch of each frequency domain amplitude is less than or equal to zero, the ultrasonic wave transmission distance is not adjusted; if the particle size-acoustic wave mismatch of each frequency domain amplitude is greater than zero, the difference between the positive integer 1 and the corresponding particle size-acoustic wave mismatch is obtained as the adjustment weight; the product of the adjustment weight and the ultrasonic wave transmission distance is obtained as the new ultrasonic wave transmission distance of each frequency domain amplitude; that is, by the above basic mathematical operation, the correlation between the particle size-acoustic wave mismatch, the ultrasonic wave transmission distance and the new ultrasonic wave transmission distance is constructed, that is, the greater the particle size-acoustic wave mismatch, the higher the frequency needs to be improved, the worse the penetration of high frequency, the new ultrasonic wave transmission distance needs to be adjusted, the greater the ultrasonic wave transmission distance, the greater the new ultrasonic wave transmission distance.

[0081] According to the new dominant frequency and the ultrasonic wave transmission distance, a new ultrasonic echo signal is obtained.

[0082] Based on this, the new ultrasonic echo signal is obtained, the time domain distribution of each frequency domain amplitude in the ultrasonic echo signal is analyzed, the new particle size-acoustic wave mismatch is obtained, and it is judged whether adjustment needs to be continued.

[0083] Until it is judged that the dominant frequency of each frequency domain amplitude does not need to be adjusted, the dominant optimal frequency is obtained.

[0084] It should be noted that the method for obtaining the dominant optimal frequency is as follows: if the particle size-acoustic wave mismatch of each frequency domain amplitude is less than or equal to a preset effective threshold, it is judged that the dominant frequency does not need to be adjusted, and the dominant frequency is taken as the dominant optimal frequency of each frequency domain amplitude.

[0085] Step S4: According to the dominant optimal frequency of different frequency domain amplitudes and the characteristics of the corresponding ultrasonic echo signal, the concentration of the filling slurry is detected.

[0086] It should be noted that in another embodiment of the present application, the concentration of the filling slurry is detected according to the dominant optimal frequency and the characteristics of the corresponding ultrasonic echo signal, including: obtaining the wavelength of the ultrasonic echo signal by calculating the ratio of the pre-acquired wave velocity and the dominant optimal frequency of each frequency domain amplitude; determining the particle diameter corresponding to each frequency domain amplitude according to the ultrasonic principle, that is, the ratio of the particle diameter and the wavelength is 0.1; calculating the ratio of the particle diameter and the wavelength according to the Rayleigh scattering principle of the signal to obtain the wave number of the ultrasonic wave; obtaining the sediment concentration under the particle diameter corresponding to each frequency domain amplitude according to the corresponding particle diameter obtained by the ultrasonic wave characteristics, the wave number and the wavelength parameters, and the related parameters set by the implementer during the concentration detection, obtaining the sediment concentration under the particle diameter corresponding to each frequency domain amplitude according to the existing relationship between the scattering intensity coefficient, the ultrasonic scattering intensity and the sediment concentration, and adding up the sediment concentrations of all particles to obtain the concentration of the filling slurry. And the wavelength, obtain the wave number of the ultrasonic wave; according to the corresponding particle diameter obtained by the ultrasonic wave characteristics, the wave number and the wavelength parameters, and the related parameters set by the implementer during the concentration detection, obtaining the sediment concentration under the particle diameter corresponding to each frequency domain amplitude according to the existing relationship between the scattering intensity coefficient, the ultrasonic scattering intensity and the sediment concentration, obtaining the concentration of the filling slurry by adding up the sediment concentrations of all particles.

[0087] In summary, the present application obtains the particle diameter and the sound wave mismatch of each frequency domain amplitude according to the time domain distribution of the frequency domain amplitude under each frequency in the frequency spectrum in the ultrasonic echo signal, judges whether the dominant frequency needs to be adjusted, if the dominant frequency needs to be adjusted, obtains the new dominant frequency of each frequency domain amplitude according to the dominant frequency and the particle diameter and the sound wave mismatch of each frequency domain amplitude, obtains the new ultrasonic wave transmission distance of each frequency domain amplitude according to the particle and the sound wave mismatch of each frequency domain amplitude and the ultrasonic wave transmission distance, obtains the new ultrasonic echo signal, until the dominant frequency under each frequency domain amplitude is judged to be not needed to be adjusted, the dominant optimal frequency of each frequency domain amplitude is obtained, and the concentration of the filling slurry is detected. The present application improves the accuracy of the concentration detection of the filling slurry by analyzing the effective dominant frequency corresponding to the particle diameter corresponding to each frequency amplitude.

[0088] The present application also provides a mine filling slurry concentration detection device, which comprises a controller, an ultrasonic transmitting transducer and an ultrasonic receiving transducer connected with the controller, the ultrasonic transmitting transducer is used for transmitting ultrasonic signals of a preset dominant frequency, and the ultrasonic receiving transducer is used for receiving ultrasonic echo signals, and the control method of the controller comprises:

[0089] obtaining the ultrasonic echo signals of different particle diameters in the filling slurry under the central dominant frequency of the preset ultrasonic wave transmission distance to obtain the frequency spectrum of the ultrasonic echo signals; the frequency spectrum comprises frequency domain amplitudes under different frequencies;

[0090] obtaining the particle diameter and the sound wave mismatch of each frequency domain amplitude according to the time domain distribution of the frequency domain amplitude under each frequency in the frequency spectrum in the ultrasonic echo signal;

[0091] According to the particle diameter and the acoustic wave mismatch of each frequency domain amplitude, it is judged whether the dominant frequency needs to be adjusted, if it is judged that the dominant frequency needs to be adjusted, according to the dominant frequency and the particle diameter and the acoustic wave mismatch of each frequency domain amplitude, a new dominant frequency of each frequency domain amplitude is obtained; according to the particle diameter and the acoustic wave mismatch of each frequency domain amplitude and the ultrasonic wave emission distance, a new ultrasonic wave emission distance of each frequency domain amplitude is obtained; according to the new dominant frequency and the ultrasonic wave emission distance, a new ultrasonic echo signal is obtained; until it is judged that the dominant frequency does not need to be adjusted under each frequency domain amplitude, the dominant optimal frequency of each frequency domain amplitude is obtained.

[0092] According to the dominant optimal frequency of different frequency domain amplitudes and the characteristics of the corresponding ultrasonic echo signals, the concentration of the filling slurry is detected.

[0093] It should be understood that the mine filling slurry concentration detection device provided by the embodiment is used to execute the above-mentioned mine filling slurry concentration detection method, and therefore has the same beneficial effects as the method adopted, run or realized by the application program stored therein.

[0094] The application further provides a mine filling slurry concentration detection system, which stores programs or instructions on the system, and the programs or instructions are executed by a processor to realize the steps of the above-mentioned mine filling slurry concentration detection method.

[0095] It should be noted that the above-mentioned embodiment sequence is only for description, and does not represent the advantages and disadvantages of the embodiments. The processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multi-task processing and parallel processing are also possible or may be advantageous.

[0096] Each embodiment in the specification is described in a progressive manner, and the same or similar parts between each embodiment can be referred to each other, and each embodiment mainly describes the difference from other embodiments.

Claims

1. A method of detecting the concentration of a mine fill slurry, characterised by, The method comprises: Based on the mine filling slurry concentration detection device, the ultrasonic echo signals of different particle sizes in the filling slurry at the center dominant frequency of the preset ultrasonic emission distance are obtained, and a frequency spectrum of the ultrasonic echo signals is obtained; the frequency spectrum comprises frequency domain amplitudes at different frequencies; According to the time domain distribution of the frequency domain amplitude at each frequency in the frequency spectrum in the ultrasonic echo signal, the particle size and the acoustic wave mismatch of each frequency domain amplitude are obtained; According to the particle size and the acoustic wave mismatch of each frequency domain amplitude, it is judged whether the dominant frequency needs to be adjusted, if it is judged that the dominant frequency needs to be adjusted, the new dominant frequency of each frequency domain amplitude is obtained according to the dominant frequency and the particle size acoustic wave mismatch of each frequency domain amplitude; the new ultrasonic emission distance of each frequency domain amplitude is obtained according to the particle size and the acoustic wave mismatch degree of each frequency domain amplitude and the ultrasonic emission distance; the new ultrasonic echo signal is obtained according to the new dominant frequency and the ultrasonic emission distance; until it is judged that the dominant frequency does not need to be adjusted at each frequency domain amplitude, the dominant optimal frequency of each frequency domain amplitude is obtained; According to the dominant optimal frequency of different frequency domain amplitudes and the characteristics of the corresponding ultrasonic echo signal, the concentration of the filling slurry is detected; The method for obtaining the particle size and the acoustic wave mismatch comprises: According to the time domain distribution of the frequency domain amplitude at each frequency in the frequency spectrum in the ultrasonic echo signal, the low dominant frequency mismatch and the high dominant frequency mismatch of each frequency domain amplitude are obtained; If the low dominant frequency mismatch at each frequency domain amplitude is greater than the corresponding high dominant frequency mismatch, the low dominant frequency mismatch corresponding to each frequency domain amplitude is taken as the particle size and the acoustic wave mismatch of each frequency domain amplitude; If the low dominant frequency mismatch at each frequency domain amplitude is equal to the corresponding high dominant frequency mismatch, the particle size and the acoustic wave mismatch of each frequency domain amplitude are set to 0; If the low dominant frequency mismatch at each frequency domain amplitude is less than the corresponding high dominant frequency mismatch, the negative of the high dominant frequency mismatch corresponding to each frequency domain amplitude is taken as the particle size and the acoustic wave mismatch of each frequency domain amplitude; The method for obtaining the low dominant frequency mismatch comprises: The ultrasonic echo signal comprises time domain amplitudes at different time points; the reconstructed signal of the frequency domain amplitude at each frequency in the frequency spectrum in the time domain of the ultrasonic echo signal is obtained, if the reconstructed signal and the time domain amplitude at any time point in the ultrasonic echo signal are peak points or valley points, the corresponding time point is taken as the dominant time point; The mean value of the absolute values of the time domain amplitudes of all dominant time points in the ultrasonic echo signal is taken as the dominant amplitude; the mean value of the absolute values of the amplitudes of other time points except the dominant time points is taken as the comparison amplitude; The difference between the dominant amplitude and the comparison amplitude is obtained, and negative correlation normalization mapping is performed, which is taken as the low dominant frequency mismatch of each frequency domain amplitude; The method for obtaining the high dominant frequency mismatch comprises: For any peak-valley point in the reconstructed signal, if the previous peak-valley point in the ultrasonic echo signal before the peak-valley point and the corresponding time point are of the same type, the previous peak-valley point is taken as the overshoot judgment time point of each frequency domain amplitude. obtaining the difference between the time-domain amplitude of each over-shoot judgment moment and the average of all peak values, if the difference is greater than or equal to 0, the over-shoot performance degree of the corresponding over-shoot judgment moment is the difference, if the difference is less than 0, the corresponding over-shoot performance degree is set to 0; obtaining the difference between the time-domain amplitude of each over-shoot judgment moment and the average of all valley values, if the difference is less than or equal to 0, the under-shoot performance degree of the corresponding over-shoot judgment moment is the difference, if the difference is greater than 0, the corresponding under-shoot performance degree is set to 0; obtaining the cumulative sum of all over-shoot performance degrees and under-shoot performance degrees of each frequency-domain amplitude, and normalizing it as the high dominant frequency mismatch degree of each frequency-domain amplitude.

2. A method of detecting the concentration of a mine fill slurry according to claim 1, characterised in that, the method for judging whether the dominant frequency needs to be adjusted according to the particle size and the acoustic wave mismatch of each frequency-domain amplitude, comprising: if the particle size and the acoustic wave mismatch of each frequency-domain amplitude is less than or equal to a preset effective threshold, the dominant frequency at the corresponding frequency-domain amplitude does not need to be adjusted.

3. The method for detecting the concentration of mine filling slurry according to claim 1, characterized in that, the dominant frequency and the particle size and acoustic wave mismatch of each frequency-domain amplitude are positively correlated with the new dominant frequency.

4. The method of claim 1, wherein the method comprises: the particle size and acoustic wave mismatch is positively correlated with the new ultrasonic wave emission distance, and the ultrasonic wave emission distance is negatively correlated with the new ultrasonic wave emission distance.

5. The method of claim 1, wherein, Normalization is performed using the function Normalization is performed using the function 6. A mine fill slurry concentration detection device, characterised in that, The device comprises a controller, an ultrasonic emission transducer and an ultrasonic receiving transducer connected to the controller, the ultrasonic emission transducer is used to emit ultrasonic signals of a preset dominant frequency, the ultrasonic receiving transducer is used to receive ultrasonic echo signals, and the control method of the controller comprises: obtaining the ultrasonic echo signals of different particle sizes of the filling slurry at the center dominant frequency of the preset ultrasonic wave emission distance, and obtaining the frequency spectrum of the ultrasonic echo signals; the frequency spectrum comprises frequency-domain amplitudes at different frequencies; obtaining the particle size and the acoustic wave mismatch of each frequency-domain amplitude according to the time-domain distribution of the frequency-domain amplitude at each frequency in the frequency spectrum; judging whether the dominant frequency needs to be adjusted according to the particle size and the acoustic wave mismatch of each frequency-domain amplitude, if it is judged that the dominant frequency needs to be adjusted, obtaining the new dominant frequency of each frequency-domain amplitude according to the dominant frequency and the particle size and acoustic wave mismatch of each frequency-domain amplitude, obtaining the new ultrasonic wave emission distance of each frequency-domain amplitude according to the particle size and acoustic wave mismatch of each frequency-domain amplitude and the ultrasonic wave emission distance, obtaining the new ultrasonic echo signal according to the new dominant frequency and the ultrasonic wave emission distance, until it is judged that the dominant frequency at each frequency-domain amplitude does not need to be adjusted, and obtaining the dominant optimal frequency of each frequency-domain amplitude; detecting the concentration of the filling slurry according to the dominant optimal frequency of different frequency-domain amplitudes and the characteristics of the corresponding ultrasonic echo signals; the method for obtaining the particle size and the acoustic wave mismatch comprises: obtaining the low dominant frequency mismatch degree and the high dominant frequency mismatch degree of each frequency-domain amplitude according to the time-domain distribution of the frequency-domain amplitude at each frequency in the frequency spectrum; if the low dominant frequency mismatch degree at each frequency-domain amplitude is greater than the corresponding high dominant frequency mismatch degree, the low dominant frequency mismatch degree at each frequency-domain amplitude is taken as the particle size and the acoustic wave mismatch of each frequency-domain amplitude. If the low dominant frequency mismatch degree of each frequency domain amplitude is equal to the corresponding high dominant frequency mismatch degree, the particle size and acoustic mismatch of each frequency domain amplitude are set to 0; If the low dominant frequency mismatch degree of each frequency domain amplitude is less than the corresponding high dominant frequency mismatch degree, the negative of the high dominant frequency mismatch degree corresponding to each frequency domain amplitude is taken as the particle size and acoustic mismatch of each frequency domain amplitude; The method for obtaining the low dominant frequency mismatch degree comprises: The ultrasonic echo signal comprises time domain amplitudes at different time points; the reconstructed signal of the frequency domain amplitude of each frequency in the frequency spectrum in the time domain of the ultrasonic echo signal is obtained, and if the reconstructed signal and the time domain amplitude at any time point in the ultrasonic echo signal are both peak points or both valley points, the corresponding time point is taken as a dominant time point; The mean value of the absolute values of the time domain amplitudes of all dominant time points in the ultrasonic echo signal is taken as a dominant amplitude, and the mean value of the absolute values of the amplitudes of all time points other than the dominant time points is taken as a comparison amplitude; The difference between the dominant amplitude and the comparison amplitude is obtained, and negative correlation normalization mapping is performed to obtain the low dominant frequency mismatch degree of each frequency domain amplitude; The method for obtaining the high dominant frequency mismatch degree comprises: For any peak-valley point in the reconstructed signal, if the peak-valley point and the previous peak-valley point in the ultrasonic echo signal before the corresponding time point are of the same type, the time point of the previous peak-valley point is taken as an overshoot judgment time point of each frequency domain amplitude; The difference between the time domain amplitude of each overshoot judgment time point inscribed in the ultrasonic echo signal and the mean value of all peak values is obtained, and if the difference is greater than or equal to 0, the overshoot performance degree of the corresponding overshoot judgment time point is the difference, and if the difference is less than 0, the corresponding overshoot performance degree is set to 0; The difference between the time domain amplitude of each overshoot judgment time point inscribed in the ultrasonic echo signal and the mean value of all valley values is obtained, and if the difference is less than or equal to 0, the undershoot performance degree of the corresponding overshoot judgment time point is the difference, and if the difference is greater than 0, the corresponding undershoot performance degree is set to 0; The cumulative sum of all overshoot performance degrees and undershoot performance degrees of each frequency domain amplitude is obtained, and normalization is performed to obtain the high dominant frequency mismatch degree of each frequency domain amplitude.

7. A mine fill slurry concentration detection system characterized by, The system stores programs or instructions, and the programs or instructions are executed by the processor to realize the steps of the mine filling slurry concentration detection method according to any one of claims 1-5.

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