A method and device for evaluating the performance index of a water acoustic transducer

Abstract

The present application relates to the technical field of computer, and especially relates to a kind of underwater acoustic transducer transmission performance index evaluation method and device.When receiving start evaluation instruction, controller controls signal generator to input first voltage to the transducer to be measured, and synchronously obtains the second voltage of the transducer to be measured on oscilloscope and the first sound pressure time history of standard hydrophone output end;Subsequently, the second voltage and the first sound pressure time history are synchronously processed using multi-signal decomposition technology to obtain the third voltage and the second sound pressure time history;Finally, the transmission voltage response level is determined based on the processed data, so as to accurately characterize the underwater acoustic transducer transmission performance index.The method optimizes signal acquisition and processing process, effectively balances detection efficiency and calculation accuracy, and provides a better solution for transducer performance evaluation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of computer, and in particular, to a method and device for evaluating the performance index of a water acoustic transducer. BACKGROUND

[0002] The water acoustic transducer can excite underwater acoustic waves in the form of electrical signals without distortion and perceive underwater acoustic waves, and is an important carrier for underwater information transmission. As a key component for sound-electricity conversion, the water acoustic transducer has been widely used in many fields such as ocean resource development, geological and topographic detection, and naval military weapons. There are many indexes for evaluating the performance of the water acoustic transducer, which are used to determine the best application occasion of the transducer. This application focuses on calculating the transmit voltage response index of the water acoustic transducer, which is used to evaluate the performance of the transducer.

[0003] In the related art, there are single frequency harmonic analysis method and Fourier transform-based analysis method. The single frequency harmonic analysis method obtains the steady-state response of the corresponding frequency by repeatedly applying the harmonic input signal, and this method is recognized as an accurate measurement method for obtaining the transmit voltage response, but the efficiency is low. The Fourier transform method calculates the transfer relationship between the input and output by performing fast Fourier transform on the input and output signals, and is a transmit voltage response estimation method with high calculation efficiency, but low accuracy.

[0004] Therefore, the present application provides a method and device for evaluating the performance index of a water acoustic transducer to solve the problem of how to accurately evaluate the performance index of the water acoustic transducer under the premise of improving the detection efficiency. SUMMARY

[0005] To solve the problem of how to accurately evaluate the performance index of the water acoustic transducer under the premise of improving the detection efficiency, the present application provides a method and device for evaluating the performance index of a water acoustic transducer.

[0006] In a first aspect, the present application provides a method for evaluating the performance index of a water acoustic transducer, which is applied to a water acoustic transducer performance index evaluation system. The system includes a signal generator, a to-be-tested transducer, a standard hydrophone, an oscilloscope and a controller connected in sequence. The to-be-tested transducer and the standard hydrophone are placed in a free radiation sound field, and the distance between the to-be-tested transducer and the standard hydrophone is a far-field distance.

[0007] The method comprises the following steps:

[0008] in response to receiving a start evaluation instruction, controlling the signal generator to input a first voltage to the to-be-tested transducer, and acquiring a second voltage on the oscilloscope and a first sound pressure time history; wherein the second voltage is a voltage on the to-be-tested transducer, and the first sound pressure time history is a sound pressure time history of an output end of the standard hydrophone;

[0009] synchronously performing a multi-signal decomposition technique on the second voltage and the first sound pressure time history to obtain a third voltage and a second sound pressure time history;

[0010] determining a transmitting voltage response level based on the third voltage and the second sound pressure time history; wherein the transmitting voltage response level is used to represent a water acoustic transducer transmitting performance index.

[0011] In a second aspect, an embodiment of the present application provides a water acoustic transducer transmitting performance index evaluation device, which is applied to a water acoustic transducer transmitting performance index evaluation system, the system comprises a signal generator, a to-be-tested transducer, a standard hydrophone, an oscilloscope and a controller which are connected in sequence; the to-be-tested transducer and the standard hydrophone are placed in a free radiation sound field, and the distance between the to-be-tested transducer and the standard hydrophone is a far field distance, and the device comprises:

[0012] an acquisition module, configured to, in response to receiving a start evaluation instruction, control the signal generator to input a first voltage to the to-be-tested transducer, and acquire a second voltage on the oscilloscope and a first sound pressure time history; wherein the second voltage is a voltage on the to-be-tested transducer, and the first sound pressure time history is a sound pressure time history of an output end of the standard hydrophone;

[0013] a first data processing module, configured to synchronously perform a multi-signal decomposition technique on the second voltage and the first sound pressure time history to obtain a third voltage and a second sound pressure time history;

[0014] a second data processing module, configured to determine a transmitting voltage response level based on the third voltage and the second sound pressure time history; wherein the transmitting voltage response level is used to represent a water acoustic transducer transmitting performance index.

[0015] In a third aspect, an embodiment of the present application further provides an electronic device, comprising a memory and a processor, the memory stores a computer program, and the processor executes the computer program to implement the method in any embodiment of the present application.

[0016] In a fourth aspect, an embodiment of the present application further provides a computer readable storage medium, which stores a computer program, and when the computer program is executed in a computer, the computer executes the method in any embodiment of the present application.

[0017] The embodiment of the present application provides a kind of underwater acoustic transducer launch performance index evaluation method and device, the present application is applied to underwater acoustic transducer launch performance index evaluation system, system includes the signal generator, measured transducer, standard hydrophone, oscilloscope and controller connected in turn;Measured transducer and standard hydrophone are placed in free radiation sound field, and the distance of measured transducer and standard hydrophone is far field distance, when receiving start evaluation instruction, controller controls signal generator to input first voltage to measured transducer, and synchronously obtains the second voltage of measured transducer on oscilloscope and the first sound pressure time course of standard hydrophone output end;Subsequently, the second voltage and first sound pressure time course are synchronously processed using multi-signal decomposition technology, to obtain third voltage and second sound pressure time course;Finally, launch voltage response level is determined based on the data processed, to accurately characterize underwater acoustic transducer launch performance index.This method optimizes signal acquisition and processing procedure, effectively considers detection efficiency and calculation accuracy, and provides a more optimal scheme for transducer performance evaluation. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0019] Figure 1 A flow chart of the underwater acoustic transducer launch performance index evaluation method according to one embodiment is shown;

[0020] Figure 2 It is a hardware architecture diagram of an electronic device provided by the embodiment of the present application;

[0021] Figure 3 A structure diagram of the underwater acoustic transducer launch performance index evaluation device according to one embodiment is shown;

[0022] Figure 4 The input voltage and output sound pressure signal time course curve according to one embodiment is shown;

[0023] Figure 5 The launch voltage response comparison curve of the method of the present application and the traditional single frequency method according to one embodiment is shown. DETAILED DESCRIPTION

[0024] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0025] Reference is made to Figure 1 The embodiments of the present application provide a method for evaluating a transmitting performance index of a hydroacoustic transducer, which is applied to a system for evaluating a transmitting performance index of a hydroacoustic transducer. The system comprises a signal generator, a to-be-tested transducer, a standard hydrophone, an oscilloscope and a controller connected in sequence. The to-be-tested transducer and the standard hydrophone are placed in a free radiation sound field, and the distance between the to-be-tested transducer and the standard hydrophone is a far-field distance.

[0026] The method comprises the following steps.

[0027] Step 100: In response to receiving a start evaluation instruction, the signal generator is controlled to input a first voltage to the to-be-tested transducer, and a second voltage on the to-be-tested transducer and a first sound pressure time history of an output end of the standard hydrophone are acquired.

[0028] Step 102: The second voltage and the first sound pressure time history are synchronously subjected to a multi-signal decomposition technology to obtain a third voltage and a second sound pressure time history.

[0029] Step 104: Based on the third voltage and the second sound pressure time history, a transmitting voltage response level is determined. The transmitting voltage response level is used to represent the transmitting performance index of the hydroacoustic transducer.

[0030] In the embodiments, the present application is applied to a system for evaluating a transmitting performance index of a hydroacoustic transducer. The system comprises a signal generator, a to-be-tested transducer (to-be-tested hydrophone), a standard hydrophone, an oscilloscope and a controller connected in sequence. The to-be-tested transducer and the standard hydrophone are placed in a free radiation sound field, and the distance between the to-be-tested transducer and the standard hydrophone is a far-field distance. When the system receives a start evaluation instruction, the controller controls the signal generator to input a first voltage to the to-be-tested transducer, and synchronously acquires a second voltage of the to-be-tested transducer on the oscilloscope and a first sound pressure time history of an output end of the standard hydrophone. Then, the second voltage and the first sound pressure time history are synchronously subjected to a multi-signal decomposition technology to obtain a third voltage and a second sound pressure time history. Finally, based on the processed data, a transmitting voltage response level is determined to accurately represent the transmitting performance index of the hydroacoustic transducer. The method optimizes the signal acquisition and processing process, effectively balances the detection efficiency and the calculation accuracy, and provides a more optimal scheme for transducer performance evaluation.

[0031] In one embodiment of the present application, the second voltage and the first sound pressure time history are synchronized to perform a multi-signal decomposition technique to obtain a third voltage and a second sound pressure time history, including:

[0032] Based on the second voltage and the first sound pressure time history, the to-be-measured parameters are determined; wherein the to-be-measured parameters include a first pole, a second pole, a first residue and a second residue;

[0033] Based on the to-be-measured parameters, the third voltage and the second sound pressure time history are determined.

[0034] In this embodiment, when the second voltage and the first sound pressure time history are processed by the multi-signal decomposition technique, first, the key to-be-measured parameters, i.e., the first pole, the second pole, the first residue and the second residue, are calculated according to the two sets of data; these parameters represent the frequency characteristics and the attenuation characteristics of the signal and are the core elements of signal decomposition. Subsequently, based on the above to-be-measured parameters, a mathematical model is constructed, and the original signal is reconstructed and analyzed through a specific algorithm, and finally more pure and accurate third voltage and second sound pressure time history data are obtained, providing high-quality input signals for the calculation of the subsequent emission voltage response stage.

[0035] In one embodiment of the present application, the to-be-measured parameters are determined by the following formula:

[0036]

[0037]

[0038]

[0039]

[0040]

[0041]

[0042]

[0043]

[0044]

[0045]

[0046]

[0047]

[0048]

[0049] In the formula, V2(t) is the vector form of the second voltage and the first sound pressure history, is the decomposition order, is the total number of decomposition terms, is the Laplace domain complex variable, is the first pole, is the time, is the first residue, is the second pole, is the second residue, is the second voltage, is the first sound pressure history, is the discrete representation in vector form, is the center matrix, is the left eigenvector matrix, is the right eigenvector matrix, is the third voltage, is the row number, is the column number, is the eigenvalue matrix, is the left eigenvector, is the right eigenvector, is the transpose operator.

[0050] In this embodiment, a time-domain voltage signal within a finite time can be decomposed into a series of linear combinations of exponential-based series,

[0051] (4)

[0052] where, is the decomposition order, is the total number of decomposition terms, is the complex exponential of the th order, is the coefficient of the th order. In equation (4), since is a real signal, mathematically must satisfy the real number or conjugate pair. Let be expressed as , then and represent the attenuation coefficient and the vibration frequency of the component signal, respectively. In addition, the coefficient corresponding to each complex exponential must also satisfy the real number or conjugate pair. Let , then and represent the amplitude and the initial phase of the component signal, respectively. Performing the Laplace transform on equation (4), we get

[0053] (5)

[0054] where, represents the Laplace-domain complex variable, is the pole of, is the residue of.

[0055] Similarly, the time-domain sound pressure signal can be decomposed into a series of linear combination as shown in equation (4),

[0056] (6)

[0057] where, is the complex exponential of the th order, is the coefficient of the th order. Taking Laplace transform of equation (6), we have

[0058] (7)

[0059] where, is the pole of, is the residue of.

[0060] It can be seen that the key to obtaining and lies in the signal decomposition of and to obtain the poles and the residues .

[0061] The steps of synchronously obtaining the poles and the residues by performing Prony-SS dual signal decomposition technique on and are as follows:

[0062] To synchronously process the voltage signal and the sound pressure signal , the two signals are integrated into a vector form:

[0063] (8)

[0064] where, In the analysis of actual engineering problems, the continuous function of is unmeasurable, and the discrete digital signal with equal time interval is easy to measure. Let the time sampling interval be , then the th discrete signal is The time point of the moment is The signal is expressed in discrete time domain as where Correspondingly, the discrete signal can be expressed in Prony series form as

[0065] (9)

[0066] where .

[0067] Next, the poles and residues of the signal can be obtained by constructing a Hankel matrix using the signal :

[0068] (10)

[0069] where are the number of rows and columns of the taken signal, respectively. The Hankel matrix can be decomposed into the form of multiplication of three sub-matrices:

[0070] (11)

[0071] where is the center matrix, which contains the system pole information; are the left and right eigenvectors, respectively. An implementation of can be obtained by and . Applying the singular value decomposition technique to , we can obtain

[0072] (12)

[0073] where is the eigenvalue matrix, are the left and right eigenvectors, respectively, represents the transpose operator. Therefore, and are balanced choices of and , which, after being substituted into , can be obtained as

[0074] (13)

[0075] Multiplying before and after equation (13) can calculate Implementation:

[0076] (14)

[0077] The characteristic analysis of the matrix yields the eigenvalue calculation result , and the pole information can be calculated through .

[0078] When is obtained, substitute into equations (7) and (8) to continue to solve the residue .

[0079] (15)

[0080] Since and are known quantities, the residue can be obtained by using the Gaussian elimination method.

[0081] After the above steps of synchronous decomposition of the input voltage signal and the output sound pressure signal, the poles and the residue information in the Laplace domain can be obtained. It is worth noting that since the frequency response characteristics of the system output signal contain the excitation components of the input signal, the poles in the output signal should contain all the poles of the input signal. In order to ensure the complete expression of the transducer system response, the present application uses the multi-signal Prony-SS method to jointly model and decouple the input and output signals, so as to ensure that the extracted system poles accurately reflect the real dynamic characteristics of the transducer. The key of this method is that the input and output signals share the same set of unified order difference equation models, and their poles constitute the global frequency characteristics. On this basis, the common poles already existing in the input signal can be further identified and removed, and only the poles specific to the transducer system itself are retained. Subsequently, combined with the known time signal samples and the extracted pole positions, the corresponding residue values can be accurately solved by the Gaussian elimination method, and the complete modeling of the system transmission voltage response function is completed.

[0082] It should also be noted that the transmission voltage response is defined as the ratio of the sound pressure in the free sound field radiated by the transducer to the input voltage of the transducer. Mathematically, it refers to the ratio of the free field sound pressure generated by the transmitting transducer at a specified distance (i.e., at ) from the effective sound center reference distance in the specified direction (sound axis direction) to the excitation voltage of the transducer input at a certain input frequency, which can be expressed as , where, Pascal is the unit of pressure, Volt is the unit of voltage. Decibel is the unit of sound pressure level The form is called the emitted voltage response level where represents the logarithm function with base 10, Usually takes So there is

[0083]

[0084] When the sound pressure measurement point is not selected at , but at a distance of from the effective sound center, the measured sound pressure is , the expression of the emitted voltage response level can be converted to

[0085] (2)

[0086] In an embodiment of the present application, the third voltage is determined by the following formula:

[0087]

[0088] In the formula, is the third voltage, is the first residue, is the first pole, is the Laplace domain complex variable, is the total number of decomposition terms.

[0089] In an embodiment of the present application, the second sound pressure time history is determined by the following formula:

[0090]

[0091] In the formula, is the second sound pressure time history, is the second residue, is the second pole, is the Laplace domain complex variable, is the total number of decomposition terms.

[0092] In an embodiment of the present application, the emitted voltage response level is determined by the following formula:

[0093]

[0094] In the formula, is the emitted voltage response level, is the third voltage, is the second sound pressure time history, and r is the far field distance.

[0095] In the present embodiment, the step of calculating the transmitting voltage response level of the transducer under test is:

[0096] Given the pole and residue have been calculated, substituting the expressions of input voltage and output sound pressure in equation (2) can get,

[0097] (16)

[0098] Since the distance between the sound pressure measuring point and the transducer under test has been measured, the values of pole , residue and the number of decomposition terms have been obtained, substituting these quantities into equation (16) can get the transmitting voltage response function of the transducer under test in Laplace domain. In particular, when taking the transmitting voltage response function of the transducer under test in frequency domain can be obtained, where represents the frequency domain variable.

[0099] In one embodiment of the present application, the first voltage is determined by the following formula:

[0100] (3)

[0101] In the formula, is the first voltage, is time, is the amplitude of the sine signal; is the frequency of the sine signal.

[0102] ​In summary, the present application utilizes Prony-SS (Prony Subspace) algorithm to synchronously decompose input voltage and output sound pressure signals, which is different from traditional single-channel processing method. The core of the technology lies in: two signals share a global pole set, so that the dynamic response characteristics of the system can be more accurately described, and the systematic error caused by single signal modeling is greatly reduced. Through Prony decomposition and Laplace transform, the present application directly extracts the corresponding poles and residues from the time domain signal, and constructs the continuous expression of input and output signals in the Laplace domain, avoiding the problems of spectrum leakage and limited resolution existing in traditional frequency domain estimation. This analytical expression provides a mathematical basis for accurately calculating the emission voltage response. The present application constructs a Hankel structure matrix from the sampled discrete signal, and extracts the main dynamic characteristics of the system by using singular value decomposition technology. This method can effectively filter out noise interference, improve the robustness of signal modeling, and ensure the accuracy and stability of pole extraction. On the basis of obtaining the system poles, the present application accurately obtains the residues of input and output signals in the Laplace domain by constructing a linear algebraic equation set and using Gaussian elimination method. These residue parameters directly affect the amplitude characteristics of the emission voltage response function, and are the key components of transducer performance evaluation. In order to avoid the redundancy of input signal poles in the system response, the present application introduces a pole elimination strategy to ensure that the output pole set reflects the emission characteristics of the transducer itself. This common pole processing mechanism significantly improves the physical accuracy of modeling and the reliability of the final result. The present application substitutes the obtained input and output function form into the modified emission voltage response calculation formula, and obtains the analytical expression of the emission voltage response function in the entire frequency band, which not only improves the frequency resolution, but also realizes faster and more accurate performance evaluation.

[0103] In the present embodiment, PZT-5A type piezoelectric circular tube type underwater acoustic transducer is selected as a numerical example, the circular tube size is 20mm long, 16mm inner diameter, 19mm outer diameter, and the material parameter value can be obtained by referring to the commonly used specification table of piezoelectric materials. In order to simulate the emission voltage response of the piezoelectric transducer in water, the transducer is surrounded by a spherical water area with a radius of 0.5m, and CAX4E and ACAX4 units in ABAQUS finite element simulation software are used to model the transducer and water area. In the finite element model, the piezoelectric circular tube is placed at the center position of the spherical water area. An sinusoidal excitation potential signal is applied by using electrical boundary conditions, as shown in equation (3), wherein , The pressure response of the system is calculated by implicit dynamic analysis method, and the sound pressure signal is collected along the horizontal direction at a distance of from the center of the transducer , Figure 4 The time history curves of input voltage and output sound pressure signal are shown. The total simulation time is , and the time step is .

[0104] The Prony-SS technique is applied to the measured signals and to obtain the poles and residues simultaneously and The transmission voltage response function of the transducer under test in the Laplace domain is obtained by substituting the poles and residues into equation (16) and plotted in Figure 5 The peaks in the plot correspond to the resonant frequencies of the whole system: the first peak is caused by the resonance of the water column in the tube and is called the Helmholtz mode; the rest of the peaks are due to the resonant characteristics of the transducer itself. Figure 5 The results of the proposed method are compared with those of the traditional single-frequency harmonic analysis method. In the measured frequency band, there is no significant difference between the results of the proposed method and the single-frequency method. In addition, the single-frequency method needs to be repeated and is very time-consuming, making it difficult to obtain enough dense transmission voltage response data points. In contrast, the proposed method only needs to measure the voltage input and sound pressure output signals once to obtain the complete transmission voltage response continuous function. This shows that the proposed method is significantly better than the traditional single-frequency method in terms of measurement efficiency, and the proposed method can obtain an analytical function.

[0105] The input and output signals are synchronized and decomposed, the consistency of the model is improved, and the traditional method independently processes the input and output signals, which is easy to cause estimation distortion due to phase error and model inconsistency. The input voltage and output sound pressure signals are modeled and processed synchronously by using the Prony-SS multi-signal decomposition technology, the consistency of the poles is ensured, the correlation of the response is strong, the stability and accuracy of the system model are improved, and the transmission characteristics of the transducer can be more truly reflected. The Laplace domain function expression is introduced to realize the analytical expression of the response function, improve the resolution and calculation accuracy, and the Fourier transform is limited to discrete frequency points, which is difficult to obtain an analytical form. The poles are extracted by the Prony series expansion and the Laplace transform to construct a continuous frequency domain expression, avoid the spectrum leakage and the window function effect, realize the continuous response estimation with high frequency resolution, and greatly improve the accuracy and flexibility of the performance evaluation. The poles are extracted by the Hankel matrix and the singular value decomposition method to effectively suppress noise and improve system robustness. In actual measurement, the signal is often accompanied by environmental noise or system disturbance. By constructing the Hankel matrix and introducing the singular value decomposition, the main components can be extracted, the secondary interference can be filtered out, the noise immunity can be enhanced, the stability and accuracy of the pole extraction can be improved, and the core characteristics can be reliably extracted. The parameters are calculated by the Gaussian elimination method to improve the parameter solution accuracy and ensure the function construction accuracy. Compared with the traditional approximate fitting method, the strict linear equation set is constructed, the Gaussian elimination method is used to solve the residual number parameters, the fitting error accumulation is avoided, the double accuracy of the response function in amplitude and phase is ensured, and the high-precision engineering evaluation demand is met. The input and output poles are coincident, the redundancy is removed, and the intrinsic characteristics of the system are highlighted. Since the input excitation itself contains frequency structure, if it is not distinguished, it is easy to be mistaken for the system dynamic characteristics. The pole selection and elimination strategy is adopted to effectively remove the influence of the excitation signal poles, retain the intrinsic response of the transducer system, and further improve the analysis physical meaning and result reliability. The continuous transmission voltage response function in the full frequency band is obtained, the efficiency is high, the measurement is once, and the full frequency is covered, which is suitable for rapid engineering evaluation. Compared with the traditional point-to-point frequency scanning measurement method (such as single-frequency harmonic analysis method), the continuous response function covering the entire frequency band can be constructed only by once excitation and response acquisition, the experimental time cost is greatly reduced, the data acquisition efficiency and repeatability are improved, and it is very suitable for engineering field rapid evaluation and system calibration scene.

[0106] As shown in Figure 2 、 Figure 3 , the embodiment of the present application provides a water acoustic transducer transmission performance index evaluation device. The device embodiment can be realized by software, or realized by hardware or a combination of software and hardware. From the hardware layer, as shown in Figure 2 , it is a hardware architecture diagram of an electronic device provided by the water acoustic transducer transmission performance index evaluation device of the embodiment of the present application. In addition to Figure 2In addition to the processor, memory, network interface, and non-volatile memory shown, an electronic device in which the apparatus of embodiments can also generally include other hardware, such as forwarding chips responsible for processing packets, and the like. For example, in software implementations, as shown, Figure 3 As shown, as a logical sense of the apparatus, it is formed by the CPU of the electronic device in which it is located to read the corresponding computer program in the non-volatile memory into the memory and run.

[0107] As shown, Figure 3 The water acoustic transducer transmission performance index evaluation apparatus provided by the embodiment is applied to a water acoustic transducer transmission performance index evaluation system, the system comprises a signal generator, a to-be-tested transducer, a standard hydrophone, an oscilloscope and a controller connected in sequence; the to-be-tested transducer and the standard hydrophone are placed in a free radiation sound field, and the distance between the to-be-tested transducer and the standard hydrophone is a far field distance, and the system comprises:

[0108] The acquisition module 300 is configured to, in response to receiving a start evaluation instruction, control the signal generator to input a first voltage to the to-be-tested transducer, and acquire a second voltage on the oscilloscope and a first sound pressure time history; wherein the second voltage is a voltage on the to-be-tested transducer, and the first sound pressure time history is a sound pressure time history of an output end of the standard hydrophone.

[0109] The first data processing module 302 is configured to perform a multi-signal decomposition technology on the second voltage and the first sound pressure time history synchronously to obtain a third voltage and a second sound pressure time history.

[0110] The second data processing module 304 is configured to determine a transmission voltage response level based on the third voltage and the second sound pressure time history; wherein the transmission voltage response level is used to represent a water acoustic transducer transmission performance index.

[0111] In an embodiment of the present application, the first data processing module 302 is configured to perform the following steps:

[0112] Determine a to-be-tested parameter based on the second voltage and the first sound pressure time history; wherein the to-be-tested parameter comprises a first pole, a second pole, a first residual and a second residual.

[0113] Determine the third voltage and the second sound pressure time history based on the to-be-tested parameter.

[0114] In an embodiment of the present application, the to-be-tested parameter is determined by the following formula:

[0115]

[0116]

[0117]

[0118]

[0119]

[0120]

[0121]

[0122]

[0123]

[0124]

[0125]

[0126]

[0127]

[0128] wherein, is a vector form of the second voltage and the first sound pressure history, is a decomposition term order, is a total number of decomposition terms, is a Laplace domain complex variable, is the first pole, is time, is the first residue, is the second pole, is the second residue, is the second voltage, is the first sound pressure history, is a discrete representation of the vector form, is a center matrix, is a left eigenvector matrix, is a right eigenvector matrix, is a third voltage, is a row number, is a column number, is an eigenvalue matrix, is a left eigenvector, is a right eigenvector, is a transpose operator.

[0129] In one embodiment of the present invention, the third voltage is determined by the following equation:

[0130]

[0131] wherein, is the third voltage, is the first residue, is the first pole, is a Laplace domain complex variable, is the total number of decomposition terms.

[0132] In one embodiment of the present application, the second sound pressure time history is determined by the following equation:

[0133]

[0134] wherein, is the second sound pressure time history, is the second residue, is the second pole, is a Laplace domain complex variable, is the total number of decomposition terms.

[0135] In one embodiment of the present application, the transmit voltage response stage is determined by the following equation:

[0136]

[0137] wherein, is the transmit voltage response stage, is the third voltage, is the second sound pressure time history, r is the far field distance.

[0138] In one embodiment of the present application, the first voltage is determined by the following equation:

[0139]

[0140] wherein, is the first voltage, is time, is the amplitude of the sinusoidal signal; is the frequency of the sinusoidal signal.

[0141] It can be understood that the structure of the embodiments of the present application does not constitute a specific limitation on the underwater acoustic transducer transmission performance index evaluation measuring device. In other embodiments of the present application, an underwater acoustic transducer transmission performance index evaluation device can include more or fewer components than the illustration, or combine certain components, or split certain components, or different component arrangements. The components illustrated can be implemented in hardware, software, or a combination of software and hardware.

[0142] The information interaction, execution process and the like between the modules in the device are based on the same concept as the method embodiments of the present application, and the specific content can be referred to the description in the method embodiments of the present application, which will not be repeated here.

[0143] The embodiment of the present application further provides an electronic device, including a memory and a processor, the memory has stored a computer program, when the processor executes the computer program, a water acoustic transducer transmission performance index evaluation method in any embodiment of the present application is realized.

[0144] The embodiment of the present application further provides a computer readable storage medium, the computer readable storage medium has stored a computer program, when the processor executes the computer program, the processor executes a water acoustic transducer transmission performance index evaluation method in any embodiment of the present application.

[0145] Specifically, a system or device equipped with a storage medium can be provided, the storage medium stores software program codes for realizing the functions of any embodiment in the above embodiments, and the computer (or CPU or MPU) of the system or device reads and executes the program codes stored in the storage medium.

[0146] In this case, the program codes read from the storage medium can realize the functions of any embodiment in the above embodiments, so the program codes and the storage medium storing the program codes constitute a part of the present application.

[0147] The storage medium embodiments for providing the program codes include floppy disks, hard disks, magneto-optical disks, optical disks (such as CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-RAM, DVD-RW, DVD+RW), magnetic tapes, nonvolatile memory cards and ROMs. Alternatively, the program codes can be downloaded from a server computer through a communication network.

[0148] In addition, it should be clear that not only the program codes read by the computer can be executed, but also the operating system and the like operating on the computer can be made to perform part or all of the actual operations based on the instructions of the program codes, so as to realize the functions of any embodiment in the above embodiments.

[0149] In addition, it can be understood that the program codes read from the storage medium are written into the memory provided in the expansion board inserted into the computer or the memory provided in the expansion module connected to the computer, and then the CPU and the like installed on the expansion board or the expansion module are made to perform part or all of the actual operations based on the instructions of the program codes, so as to realize the functions of any embodiment in the above embodiments.

[0150] It should be noted that the terms such as first and second are used herein merely to differentiate one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device.

[0151] Those skilled in the art can understand that all or part of the steps of the above-mentioned method embodiments can be completed by program instruction related hardware, and the aforementioned program can be stored in a computer readable storage medium, and the program executes the steps including the above-mentioned method embodiments when executed; and the aforementioned storage medium includes various storage medium capable of storing program codes such as ROM, RAM, magnetic disc or optical disc.

[0152] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for evaluating the performance index of a water acoustic transducer, characterized in that, The application is applied to a water acoustic transducer emission performance index evaluation system, the system comprises a signal generator, a to-be-tested transducer, a standard hydrophone, an oscilloscope and a controller connected in sequence; the to-be-tested transducer and the standard hydrophone are placed in a free radiation sound field, and the distance between the to-be-tested transducer and the standard hydrophone is a far field distance; The method comprises: In response to receiving a start evaluation instruction, the signal generator is controlled to input a first voltage to the to-be-tested transducer, and a second voltage on the oscilloscope and a first sound pressure time history are acquired; wherein the second voltage is the voltage on the to-be-tested transducer, and the first sound pressure time history is the sound pressure time history of the output end of the standard hydrophone; The second voltage and the first sound pressure time history are synchronously subjected to a multi-signal decomposition technique to obtain a third voltage and a second sound pressure time history; Based on the third voltage and the second sound pressure time history, a transmission voltage response level is determined; wherein the transmission voltage response level is used to represent the water acoustic transducer emission performance index; The second voltage and the first sound pressure time history are synchronously subjected to a multi-signal decomposition technique to obtain a third voltage and a second sound pressure time history, comprising: Based on the second voltage and the first sound pressure time history, a to-be-tested parameter is determined; wherein the to-be-tested parameter comprises a first pole, a second pole, a first residual and a second residual; Based on the to-be-tested parameter, the third voltage and the second sound pressure time history are determined; The to-be-tested parameter is determined by the following formula: wherein is a vector form of the second voltage and the first sound pressure history, is a decomposition term, is a total number of decomposition terms, is a Laplace domain complex variable, is the first pole, is time, is the first residue, is the second pole, is the second residue, is the second voltage, is the first sound pressure history, is a discrete representation of the vector form, is a center matrix, is a left eigenvector matrix, is a right eigenvector matrix, is a third voltage, is a number of rows, is a number of columns, is an eigenvalue matrix, is a left eigenvector, is a right eigenvector, is a transpose operator; The third voltage is determined by the following formula: wherein is the third voltage, is the first residue, is the first pole, is the Laplace domain complex variable, is the total number of decomposition terms; The second sound pressure time history is determined by the following formula: wherein is the second sound pressure time history, is the second residue, is the second pole, is the Laplace domain complex variable, is the total number of decomposition terms.

2. The method of claim 1, wherein, The transmission voltage response level is determined by the following formula: wherein is the transmit voltage response stage, is the third voltage, is the second sound pressure time history, r is the far field distance.

3. The method of claim 2, wherein, The first voltage is determined by the following formula: wherein is the first voltage, is time, is the amplitude of the sinusoidal signal; is the frequency of the sinusoidal signal.

4. An underwater acoustic transducer emission performance index evaluation device, characterized in that, The application is applied to a water acoustic transducer emission performance index evaluation system, the system comprises a signal generator, a to-be-tested transducer, a standard hydrophone, an oscilloscope and a controller connected in sequence; the to-be-tested transducer and the standard hydrophone are placed in a free radiation sound field, and the distance between the to-be-tested transducer and the standard hydrophone is a far field distance, for executing the method as claimed in any one of claims 1-3, comprising: An acquisition module is configured to, in response to receiving a start evaluation instruction, control the signal generator to input a first voltage to the to-be-tested transducer, and acquire a second voltage on the oscilloscope and a first sound pressure time history; wherein the second voltage is the voltage on the to-be-tested transducer, and the first sound pressure time history is the sound pressure time history of the output end of the standard hydrophone; A first data processing module is configured to synchronously subject the second voltage and the first sound pressure time history to a multi-signal decomposition technique to obtain a third voltage and a second sound pressure time history; A second data processing module is configured to determine a transmission voltage response level based on the third voltage and the second sound pressure time history; wherein the transmission voltage response level is used to represent the water acoustic transducer emission performance index.

5. An electronic device, comprising: A memory and a processor are included, the memory stores a computer program, and the processor executes the computer program to implement the method as claimed in any one of claims 1-3.

6. A computer readable storage medium characterized by, a computer program is stored thereon, which, when executed in a computer, causes the computer to perform the method of any one of claims 1-3.

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