Sound field detection system, method, electronic device, and medium based on dual-detector phase imaging

Abstract

The present invention provides an acoustic field detection system, method, electronic device, and medium based on dual-detector phase imaging, comprising: a parallel light field emission module, which is used to generate a pulse parallel light field to illuminate an acoustic field medium, the pulse parallel light field is subjected to wavefront modulation by the acoustic field medium, amplified and imaged by an imaging module, and the pulse parallel light field is beam-splittered into a transmitted wavefront and a reflected wavefront, and a first light field intensity distribution corresponding to the transmitted wavefront is recorded by a first light field detector, and a second light field intensity distribution corresponding to the reflected wavefront is recorded by a second light field detector; an ultrasonic transducer module, which is used to generate a high-frequency acoustic field to be measured; and a control and calculation module, which is used to control the synchronization of the parallel light field emission module and the first light field detector and the second light field detector, and store the first light field intensity distribution and the second light field intensity distribution to calculate the complex amplitude distribution of the high-frequency acoustic field to be measured.

Description

Technical Field

[0001] The present invention belongs to the field of light field phase imaging and sound field detection, and in particular relates to a sound field detection system, method, electronic equipment and medium based on dual-detector phase imaging. Background Art

[0002] Traditional sound field detection methods generally use an ultrasonic probe to scan point by point. This method is based on the propagation characteristics of ultrasonic waves in the material being detected. It uses an ultrasonic probe to scan point by point on the surface or inside of the material. By analyzing the reflection, transmission or scattering information of the ultrasonic wave, the internal structure and defects of the material are detected. However, this method requires a long scanning time and interferes with the distribution of the sound field to be measured.

[0003] At present, the distribution parameters of the sound field can also be determined by recording the intensity distribution of the transmitted light field fringes. This method is a technology that combines optics and acoustics. Specifically, when the sound wave propagates through the medium, it will cause the density of the medium to change, and this change will in turn change the refractive index of the medium. When the light field passes through this medium modulated by the sound wave, the propagation path and phase of the light will be affected, resulting in changes in the intensity distribution of the transmitted light field. However, this method detects the intensity distribution of the light field diffracted after passing through the sound field medium, and cannot obtain the density distribution of the sound field medium. In addition, it is affected by the intensity of the light source and the diffraction of the medium, and the error is large.

[0004] At present, the sound field detection can also be carried out based on coded phase imaging. This method obtains the initial light field complex amplitude distribution at the front surface of the coding plate, and propagates it iteratively between the plane where the light field detector is located, the plane where the coding plate is located, and the constraint surface, and finally obtains the wavefront distribution at the front surface of the coding plate; the wavefront distribution at the front surface of the coding plate is transmitted back to the plane where the ultrasonic transducer module is located, so as to calculate the wavefront amplitude and phase distribution of the wavefront distribution at the front surface of the coding plate at the ultrasonic transducer module, and obtain the complex amplitude distribution of the sound field. This method requires the modulation wavefront distribution of the coding plate to be calibrated in advance, resulting in large errors, and the calibration of the coding plate makes the stability of the measurement system poor, so the error is large when it is used. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a sound field detection method, electronic equipment and medium based on dual-detector phase imaging.

[0006] In a first aspect, an embodiment of the present invention provides an acoustic field detection system based on dual-detector phase imaging, the system comprising:

[0007] A parallel light field emission module is used to generate a pulse parallel light field to illuminate the acoustic field medium. The pulse parallel light field is subjected to wavefront modulation by the acoustic field medium, amplified and imaged by the imaging module, and the pulse parallel light field is split into a transmitted wavefront and a reflected wavefront by a beam splitter. The first light field intensity distribution corresponding to the transmitted wavefront is recorded by a first light field detector, and the second light field intensity distribution corresponding to the reflected wavefront is recorded by a second light field detector.

[0008] Ultrasonic transducer module, used to generate high-frequency sound field to be measured;

[0009] The control and calculation module is used to control the synchronization of the parallel light field emission module and the first light field detector and the second light field detector, and store the first light field intensity distribution corresponding to the transmitted wavefront recorded by the first light field detector and the second light field intensity distribution corresponding to the reflected wavefront recorded by the second light field detector to calculate the complex amplitude distribution of the high-frequency sound field to be measured.

[0010] In a second aspect, an embodiment of the present invention provides a sound field detection method based on dual-detector phase imaging, the method comprising:

[0011] The ultrasonic transducer module generates a high-frequency sound field to be measured;

[0012] The position coordinates of the first light field detector and the second light field detector are measured and calibrated, and the first light field intensity distribution corresponding to the transmitted wavefront is recorded by the first light field detector, and the second light field intensity distribution corresponding to the reflected wavefront is recorded by the second light field detector;

[0013] The plane where the first light field detector is located is set as the first plane, the plane where the second light field detector is located is set as the second plane, and the imaging plane of the ultrasonic transducer module is set as the third plane; the light field complex amplitude distribution at the imaging plane of the ultrasonic transducer module is used as the initial light field complex amplitude distribution; the initial light field complex amplitude distribution is iteratively propagated between the first plane, the second plane, and the third plane, and the light field distribution is updated according to the calibrated position coordinates of the first light field detector and the second light field detector; the error is calculated based on the light field intensity distribution, and the iteration is completed when the error is less than a threshold value to obtain the light field distribution at the imaging plane of the ultrasonic transducer module.

[0014] The wavefront amplitude and phase distribution at the ultrasonic transducer module are calculated based on the final light field wavefront distribution at the imaging plane of the ultrasonic transducer module; wherein the phase distribution corresponds to the density change of the sound field medium, thereby obtaining the intensity and sound pressure parameter distribution of the sound field.

[0015] In a third aspect, an embodiment of the present invention provides an electronic device, comprising a memory and a processor, wherein the memory is coupled to the processor; wherein the memory is used to store program data, and the processor is used to execute the program data to implement the above-mentioned sound field detection method based on dual-detector phase imaging.

[0016] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-mentioned sound field detection method based on dual-detector phase imaging.

[0017] In a fifth aspect, an embodiment of the present invention provides a computer program product, including a computer program / instruction, which, when executed by a processor, implements the above-mentioned sound field detection method based on dual-detector phase imaging.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention provides a sound field detection system and method based on dual-detector phase imaging. The present invention splits a pulse parallel light field into a transmission wavefront and a reflection wavefront through a beam splitter, records a first light field intensity distribution corresponding to the transmission wavefront through a first light field detector, and records a second light field intensity distribution corresponding to the reflection wavefront through a second light field detector. The present invention provides dual detectors, thereby eliminating the need to calibrate the modulation wavefront distribution of a coding plate in advance, thereby improving the accuracy and stability of sound field detection. The present invention can simultaneously measure the light field intensity and phase, thereby indirectly reflecting the density change of the sound field medium. Furthermore, the method of the present invention belongs to non-destructive testing, and can reconstruct sound field distribution parameters without destroying the sound field to be measured, which is of great significance for high-precision detection of sound field equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0021] Figure 1 A schematic diagram of an acoustic field detection system based on dual-detector phase imaging provided by an embodiment of the present invention;

[0022] Figure 2 A schematic diagram of an acoustic field detection system based on dual-detector phase imaging under a spatial pulse laser provided by an embodiment of the present invention;

[0023] Figure 3A schematic diagram of an acoustic field detection system based on dual-detector phase imaging under a fiber pulse laser provided by an embodiment of the present invention;

[0024] Figure 4 A schematic diagram of a flow chart of a sound field detection method based on dual-detector phase imaging provided by an embodiment of the present invention;

[0025] Figure 5 A schematic diagram of the appearance of a test platform for installing a sound field detection system provided by an embodiment of the present invention;

[0026] Figure 6 An internal structural diagram of a test platform for installing an acoustic field detection system provided by an embodiment of the present invention;

[0027] Figure 7 A schematic diagram of an electronic device provided by an embodiment of the present invention.

[0028] In the figure, 1-parallel light field emission module, 2-acoustic field medium, 3-ultrasonic transducer module, 4-mechanical translation module, 5-imaging module, 6-beam splitter, 7-first light field detector, 8-second light field detector, 9-control and calculation module, 10-spatial pulse laser, 11-spatial light filter, 12-collimating lens, 13-achromatic imaging lens, 14-fiber pulse laser, 15-optical fiber jumper, 16-first beam reduction imaging lens, 17-second beam reduction imaging lens, 101-outer frame, 102-horizontal installation plane, 103-vertical installation plane, 104-parallel light field emission module packaging structure, 105-imaging and detection module packaging structure, 106-acoustic field medium module structure, 107-water purification circulation system, 108-control and computer module. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that, in the absence of conflict, the features in the following embodiments and implementations may be combined with each other.

[0031] like Figure 1 As shown, an embodiment of the present invention provides an acoustic field detection system based on dual-detector phase imaging, the system comprising:

[0032] A parallel light field emission module 1, wherein the parallel light field emission module 1 is used to generate a pulse parallel light field to illuminate an acoustic field medium, the pulse parallel light field is subjected to wavefront modulation by an acoustic field medium 2, amplified and imaged by an imaging module 4, and the pulse parallel light field is split into a transmitted wavefront and a reflected wavefront by a beam splitter 6, a first light field intensity distribution corresponding to the transmitted wavefront is recorded by a first light field detector 7, and a second light field intensity distribution corresponding to the reflected wavefront is recorded by a second light field detector 8;

[0033] Ultrasonic transducer module 3, used to generate a high-frequency sound field to be measured;

[0034] The control and calculation module 7 is used to control the synchronization of the parallel light field emission module 1 and the first light field detector 7 and the second light field detector 8, and store the first light field intensity distribution corresponding to the transmitted wavefront recorded by the first light field detector 7 and the second light field intensity distribution corresponding to the reflected wavefront recorded by the second light field detector 8 to calculate the complex amplitude distribution of the high-frequency sound field to be measured.

[0035] Furthermore, if Figure 1 As shown, the system further includes: a mechanical translation module 4 for three-dimensionally moving the ultrasonic transducer module 3 in the x direction, the y direction and the z direction.

[0036] Furthermore, the parallel light field emission module 1 uses a space laser to generate a parallel light field system or a fiber laser to generate a parallel light field system; the pulse width of the pulse parallel light field generated by the parallel light field emission module 1 is less than 10ns, and the repetition frequency is less than 1kHz.

[0037] Furthermore, the imaging module 4 adopts a reduced beam imaging system for low-frequency and large-caliber sound field detection; or, the imaging module 4 adopts an imaging amplification system for high-frequency and small-caliber sound field detection.

[0038] Example 1

[0039] like Figure 2 As shown, this example provides an acoustic field detection system based on coded phase imaging, wherein the parallel light field emission module 1 selects a spatial laser 10; specifically, the system includes: a spatial pulse laser 10, a spatial light filter 11, a collimating lens 12, an acoustic field medium 2, an achromatic imaging lens 13, a beam splitter 6, a first light field detector 7, and a second light field detector 8 arranged in sequence.

[0040] Wherein, the spatial pulse laser 10 is used to generate a spatial pulse light field for illuminating a transient sound field medium; in this example, the light source wavelength of the spatial pulse laser 10 is 660nm, the pulse width is 2.5ns, and the repetition frequency is 2KHz. The spatial light filter 10 is used to filter out stray light and generate a spherical pulse light field; the collimating lens 11 is used to collimate the spherical pulse light field into a parallel light field for illuminating the sound field medium. The sound field medium module 2 is used to propagate the sound field and generate amplitude and phase modulation of the parallel light field; the ultrasonic transducer module 3 is used to generate a high-frequency sound field to be measured.

[0041] Furthermore, in this example, the unit pixel size of the first light field detector 7 and the second light field detector 8 is 9 μm×9 μm, the target surface size is 4096×4096, and the dynamic range is 16 bits.

[0042] Example 2

[0043] like Figure 3 As shown, this example provides an acoustic field detection system based on coded phase imaging, wherein the parallel light field emission module 1 uses a fiber pulse laser 14; specifically, the system includes: a fiber pulse laser 14, a collimating lens 12, an acoustic field medium 2, a first beam reduction imaging lens 16, a second beam reduction imaging lens 17, a beam splitter 6, a first light field detector 7, and a second light field detector 8 arranged in sequence. The fiber pulse laser 14 and the collimating lens 12 are connected by an optical fiber jumper 15.

[0044] The fiber pulse laser 14 is used to generate a fiber pulse light field for illuminating a transiently changing sound field medium; in this example, the light source wavelength of the fiber pulse laser 14 is 1030nm, the bandwidth is 10nm, the repetition frequency is 2KHz, and the pulse width is 100ps. The fiber jumper 15 is used to generate a transmission light field and ultimately generate a spherical light field; the collimating lens 12 is used to collimate the spherical pulse light field into a parallel light field for illuminating the sound field medium; the sound field medium module 2 is used to propagate the sound field and generate wavefront modulation for the parallel light field; the ultrasonic transducer module 3 is used to generate a high-frequency sound field to be measured; the first beam shrinking imaging lens 16 is used to shrink the light field; the second beam shrinking imaging lens 17 is used to image the square after the beam shrinking.

[0045] Furthermore, in this example, the unit pixel size of the first light field detector 7 and the second light field detector 8 is 9 μm×9 μm, the target surface size is 4096×4096, and the dynamic range is 16 bits.

[0046] like Figure 4As shown, an embodiment of the present invention further provides a sound field detection method based on dual-detector phase imaging, which is implemented based on the above-mentioned sound field detection system based on dual-detector phase imaging. The method includes the following steps:

[0047] Step S1 : The ultrasonic transducer module 3 generates a high-frequency sound field to be measured.

[0048] Specifically, the mechanical translation module 4 is used to translate the ultrasonic transducer module 3 into the visible range of the light field, and the ultrasonic transducer module 3 is started to emit a high-frequency sound field to be measured.

[0049] Step S2, measuring and calibrating the xyz three-dimensional position coordinates of the first light field detector 7 and the second light field detector 8, and recording the first light field intensity distribution corresponding to the transmitted wavefront through the first light field detector 7 , the second light field intensity distribution corresponding to the reflected wavefront is recorded by the second light field detector 8 ; Wherein, x represents the abscissa, y represents the ordinate, x1 represents the lateral offset position of the first light field detector 7, y1 represents the longitudinal offset position of the first light field detector 7, x2 represents the lateral offset position of the second light field detector 8, y2 represents the longitudinal offset position of the second light field detector 8, is the time, and n is the corresponding time serial number.

[0050] Step S3, setting the plane where the first light field detector 7 is located as the first plane, setting the plane where the second light field detector 8 is located as the second plane, and setting the imaging plane of the ultrasonic transducer module 3 as the third plane; taking the light field complex amplitude distribution at the imaging plane of the ultrasonic transducer module 3 as the initial light field complex amplitude distribution; iteratively propagating the initial light field complex amplitude distribution between the first plane, the second plane, and the third plane, and updating the light field distribution according to the calibrated position coordinates of the first light field detector and the second light field detector; calculating the error based on the light field intensity distribution, completing the iteration when the error is less than the threshold, and obtaining the light field distribution at the imaging plane of the ultrasonic transducer module 3.

[0051] Specifically, Figure 4 As shown, step S3 includes the following sub-steps:

[0052] Step S301, setting the initial light field complex amplitude distribution at the imaging plane of the ultrasonic transducer module 3, the expression is as follows:

[0053]

[0054] In the formula, A and are the amplitude and phase distributions of random guesses, i represents an imaginary number, n represents the corresponding time sequence number, is the recording time of the corresponding light field detector.

[0055] Step S302: Taking the initial light field complex amplitude distribution at the imaging plane of the ultrasonic transducer module 3 as the first iteration value, the expression is as follows:

[0056]

[0057] Step S303, in the kth iteration process, adding an aperture function constraint to the complex amplitude distribution of the light field, and after propagating to the first plane, obtaining a first light field wavefront distribution.

[0058] Specifically, in the kth iteration process, the light field Applying aperture function constraints becomes ; Where k represents the number of iterations, k=1,2,3,…,K, and K is the total number of iterations.

[0059] After propagating to the first plane, the first light field wavefront distribution is obtained, and the expression is as follows:

[0060]

[0061] In the formula, represents the free space propagation distance of the light field, L AD Indicates that the forward propagation distance between the third plane and the first plane is L AD .

[0062] Step S304: the first light field wavefront distribution is updated on the first plane based on the first light field intensity distribution to obtain a second light field wavefront distribution, which is expressed as follows:

[0063]

[0064] In the formula, i represents an imaginary number, Indicates the phase angle of the light field. x1 indicates the offset position of the diffraction spot recorded by the first light field detector in the transverse x direction, and y1 indicates the offset position of the diffraction spot recorded by the first light field detector in the longitudinal y direction.

[0065] Step S305: After the second light field wavefront distribution is propagated to the second plane, a third light field wavefront distribution is obtained, which is expressed as follows:

[0066]

[0067] Where, L DF is the forward propagation distance between the first plane and the second plane.

[0068] The third light field wavefront distribution is updated based on the second light field intensity distribution to obtain a fourth light field wavefront distribution, which is expressed as follows:

[0069]

[0070] Wherein, x2 represents the offset position of the diffraction spot recorded by the second light field detector in the transverse x direction, and y2 represents the offset position of the diffraction spot recorded by the second light field detector in the longitudinal y direction.

[0071] Step S306, transmitting the fourth light field wavefront distribution back to the third plane to obtain the fifth light field wavefront distribution, which is expressed as follows:

[0072]

[0073] In the formula, Represents the distance L of the light field's reverse propagation in free space.

[0074] Step S307 , iterate according to the above process, and calculate the error based on the third light field wavefront distribution and the second light field intensity distribution. When the error is less than a threshold, the iteration is completed to obtain the final light field wavefront distribution at the imaging plane of the ultrasonic transducer module 3 .

[0075] Specifically, the error expression is as follows:

[0076]

[0077] Step S4, calculating the wavefront amplitude at the ultrasonic transducer module 3 based on the final light field wavefront distribution at the imaging plane of the ultrasonic transducer module 3 and phase distribution ; Among them, the phase distribution corresponds to the density change of the sound field medium 2, thereby obtaining the intensity and sound pressure parameter distribution of the sound field.

[0078] In summary, the method of the present invention can have more measurement functions, including light field amplitude and phase measurement, sound field medium density measurement, sound field intensity and sound pressure measurement, etc. The present invention splits the pulse parallel light field into a transmitted wavefront and a reflected wavefront through a beam splitter, records the first light field intensity distribution corresponding to the transmitted wavefront through a first light field detector, and records the second light field intensity distribution corresponding to the reflected wavefront through a second light field detector; the present invention sets up a dual detector, thereby eliminating the need for light field modulation of the encoding plate, reducing the error of precise calibration of the encoding plate, and having the advantages of high spatial resolution and high phase measurement accuracy.

[0079] Furthermore, in order to realize the industrialization of dual-detector phase imaging, this example designs a compact, low-cost, and highly reliable packaging structure to form a test platform. Figure 5 As shown, the appearance adopts a movable rectangular structure, which occupies a small area. At the same time, in order to facilitate the test operation, the computer monitor and keyboard are installed in an external wall-mounted structure.

[0080] See attached for the interior of the test platform Figure 6 , adopts an integrated outer frame structure 101, which has the characteristics of stable structure and high reliability. Among them, a horizontal mounting plane 102 and a vertical mounting plane 103 are provided on the outer frame. In order to reduce the outer size and achieve a compact structure, the components in the parallel light field emission module are installed on the vertical mounting plane 101, and the emission light path is rotated 90 degrees through the light path folding design and then directed to the collimating lens. The imaging module, beam splitting device, light field detector, etc. are arranged on the horizontal mounting plane 102. The components installed on the horizontal mounting plane 102 are packaged by the parallel light field emission module packaging structure 104, and the components arranged on the horizontal mounting plane 102 are packaged by the imaging and detection module packaging structure 105, so as to realize the separation of internal and external light and prevent the external environment from affecting the internal test light path.

[0081] A threaded mounting hole structure is also provided at the upper end of the parallel light field emission module packaging structure 104 and the imaging and detection module packaging structure 105 for the installation and fixation of the mechanical translation system. The sound field medium module structure 106 adopts a visual structural material, such as a transparent acrylic material or a glass material, to facilitate observation of its interior during the test. At the same time, in order to achieve the effect of simulating water flow in the sound field medium module and keep the test water clean, a set of clean water circulation system 107 is also designed, including a water pump, a filter, a hydraulic joint, a flow valve, a connecting pipe, etc. The water inlet and outlet hydraulic joints are respectively arranged on the back of the sound field medium module structure 106. In order to make full use of the test platform space, the clean water circulation system 107, the control and computer module 108 and other equipment with low user usage during the test are arranged at the lower part of the test platform.

[0082] Accordingly, the present application also provides an electronic device, comprising: one or more processors; a memory for storing one or more programs; when the one or more programs are executed by the one or more processors, the one or more processors implement the above-mentioned sound field detection based on dual-detector phase imaging. Figure 7 As shown, it is a hardware structure diagram of the acoustic field detection based on dual-detector phase imaging provided by the embodiment of the present invention in any device with data processing capability, except Figure 7 In addition to the processor, memory and network interface shown, any device with data processing capability in which the apparatus in the embodiment is located may also include other hardware, generally based on the actual functions of the device with data processing capability, which will not be described in detail.

[0083] Accordingly, the present application also provides a computer-readable storage medium on which computer instructions are stored, and when the instructions are executed by the processor, the acoustic field detection based on dual-detector phase imaging as described above is realized. The computer-readable storage medium can be an internal storage unit of any device with data processing capabilities described in any of the aforementioned embodiments, such as a hard disk or a memory. The computer-readable storage medium can also be an external storage device, such as a plug-in hard disk, a smart memory card (Smart Media Card, SMC), an SD card, a flash card (Flash Card), etc. equipped on the device. Furthermore, the computer-readable storage medium can also include both an internal storage unit and an external storage device of any device with data processing capabilities. The computer-readable storage medium is used to store the computer program and other programs and data required by any device with data processing capabilities, and can also be used to temporarily store data that has been output or is to be output.

[0084] The above embodiments are only used to illustrate the design ideas and features of the present invention, and their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. The protection scope of the present invention is not limited to the above embodiments. Therefore, any equivalent changes or modifications made based on the principles and design ideas disclosed by the present invention are within the protection scope of the present invention.

Claims

1. A sound field detection method based on dual-detector phase imaging, characterized in that: The method is implemented by an acoustic field detection system based on dual-detector phase imaging, the system comprising: A parallel light field emission module (1) is used to generate a pulse parallel light field to illuminate an acoustic field medium, the pulse parallel light field is subjected to wavefront modulation by the acoustic field medium (2), amplified and imaged by an imaging module (4), the pulse parallel light field is beam-splittered into a transmission wavefront and a reflection wavefront by a beam splitter (6), a first light field intensity distribution corresponding to the transmission wavefront is recorded by a first light field detector (7), and a second light field intensity distribution corresponding to the reflection wavefront is recorded by a second light field detector (8); An ultrasonic transducer module (3), used to generate a high-frequency sound field to be measured; A control and calculation module (9) is used to control the synchronization of the parallel light field emission module (1) and the first light field detector (7) and the second light field detector (8), and to store a first light field intensity distribution corresponding to the transmitted wavefront recorded by the first light field detector (7) and a second light field intensity distribution corresponding to the reflected wavefront recorded by the second light field detector (8) to calculate the complex amplitude distribution of the high-frequency sound field to be measured; The method comprises: The ultrasonic transducer module generates a high-frequency sound field to be measured; The position coordinates of the first light field detector and the second light field detector are measured and calibrated, and the first light field intensity distribution corresponding to the transmitted wavefront is recorded by the first light field detector, and the second light field intensity distribution corresponding to the reflected wavefront is recorded by the second light field detector; The plane where the first light field detector is located is set as the first plane, the plane where the second light field detector is located is set as the second plane, and the imaging plane of the ultrasonic transducer module is set as the third plane; the light field complex amplitude distribution at the imaging plane of the ultrasonic transducer module is used as the initial light field complex amplitude distribution; the initial light field complex amplitude distribution is iteratively propagated between the first plane, the second plane, and the third plane, and the light field distribution is updated according to the calibrated position coordinates of the first light field detector and the second light field detector; the error is calculated based on the light field intensity distribution, and the iteration is completed when the error is less than a threshold value to obtain the light field distribution at the imaging plane of the ultrasonic transducer module; The wavefront amplitude and phase distribution at the ultrasonic transducer module are calculated based on the final light field wavefront distribution at the imaging plane of the ultrasonic transducer module; wherein the phase distribution corresponds to the density change of the sound field medium, thereby obtaining the intensity and sound pressure parameter distribution of the sound field.

2. The sound field detection method based on dual-detector phase imaging according to claim 1, characterized in that: The imaging module (4) adopts a reduced beam imaging system for low-frequency and large-caliber sound field detection; or, the imaging module (4) adopts an imaging amplification system for high-frequency and small-caliber sound field detection.

3. The sound field detection method based on dual-detector phase imaging according to claim 1, characterized in that: The parallel light field emission module (1) adopts a space laser or a fiber pulse laser.

4. The sound field detection method based on dual-detector phase imaging according to claim 1, characterized in that: The process of measuring and calibrating the position coordinates of the first light field detector and the second light field detector, recording the first light field intensity distribution corresponding to the transmitted wavefront by the first light field detector, and recording the second light field intensity distribution corresponding to the reflected wavefront by the second light field detector includes: Measuring and calibrating the position coordinates of the first light field detector and the second light field detector; The first light field intensity distribution corresponding to the transmitted wavefront is recorded by the first light field detector and recorded as ; Wherein, x represents the abscissa, y represents the ordinate, x1 represents the lateral offset position of the first light field detector, y1 represents the longitudinal offset position of the first light field detector, is the time, n is the corresponding time serial number; The second light field intensity distribution corresponding to the reflected wavefront is recorded by the second light field detector and recorded as ; Wherein, x2 represents the lateral offset position of the second light field detector, and y2 represents the longitudinal offset position of the second light field detector.

5. The sound field detection method based on dual-detector phase imaging according to claim 1, characterized in that: The process of using the light field complex amplitude distribution at the imaging plane of the ultrasonic transducer module as the initial light field complex amplitude distribution; iteratively propagating the initial light field complex amplitude distribution between the first plane, the second plane, and the third plane, and updating the light field distribution according to the calibrated position coordinates of the first light field detector and the second light field detector includes: The initial light field complex amplitude distribution at the imaging plane of the ultrasonic transducer module is set as follows: ； In the formula, A and are the amplitude and phase distributions of random guesses, n is the corresponding time sequence number, is the recording time of the corresponding light field detector, i represents an imaginary number; The initial light field complex amplitude distribution at the imaging plane of the ultrasonic transducer module is taken as the first iteration value, and the expression is as follows: ； In the kth iteration process, an aperture function constraint is added to the complex amplitude distribution of the light field, and after propagating to the first plane, the first light field wavefront distribution is obtained; Specifically, in the kth iteration process, the light field Applying aperture function constraints becomes ; Where k represents the number of iterations, k=1,2,3,…,K, K is the total number of iterations; After propagating to the first plane, the first light field wavefront distribution is obtained, and the expression is as follows: ； In the formula, represents the free space propagation distance of the light field, L AD Indicates that the forward propagation distance between the third plane and the first plane is L AD ; The first light field wavefront distribution is updated in the first plane based on the first light field intensity distribution to obtain the second light field wavefront distribution, which is expressed as follows: ； In the formula, represents the phase angle of the light field; x1 represents the offset position of the diffraction spot recorded by the first light field detector in the transverse x direction, and y1 represents the offset position of the diffraction spot recorded by the first light field detector in the longitudinal y direction; After the second light field wavefront distribution propagates to the second plane, the third light field wavefront distribution is obtained, and the expression is as follows: ； Where, L DF is the forward propagation distance between the first plane and the second plane; The third light field wavefront distribution is updated based on the second light field intensity distribution to obtain a fourth light field wavefront distribution, which is expressed as follows: ； Wherein, x2 represents the offset position of the diffraction spot recorded by the second light field detector in the transverse x direction, and y2 represents the offset position of the diffraction spot recorded by the second light field detector in the longitudinal y direction; The wavefront distribution of the fourth light field is transmitted back to the third plane to obtain the wavefront distribution of the fifth light field, which is expressed as follows: ； In the formula, Represents the distance L of the light field's reverse propagation in free space.

6. The sound field detection method based on dual-detector phase imaging according to claim 1, characterized in that: The process of calculating the error based on the light field intensity distribution includes: ； In the formula, represents the second light field intensity distribution, represents the wavefront distribution of the third light field obtained in the kth iteration.

7. An electronic device comprising a memory and a processor, characterized in that: The memory is coupled to the processor; wherein the memory is used to store program data, and the processor is used to execute the program data to implement the sound field detection method based on dual-detector phase imaging as described in any one of claims 1-6.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the sound field detection method based on dual-detector phase imaging as described in any one of claims 1 to 6 is implemented.

9. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instruction is executed by a processor, the sound field detection method based on dual-detector phase imaging described in any one of claims 1-6 is implemented.

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