An acoustic wave detection device

Abstract

The application is suitable for the field of sound signal detection technology, and provides a sound wave detection device. The sound wave detection device comprises: a mounting reference frame, a sound inlet channel is arranged through the middle of the mounting reference frame; a plurality of groups of detection assemblies, the plurality of groups of detection assemblies are arranged on the mounting reference frame and are arranged in a circumferential distribution along the sound inlet channel, each group of detection assemblies comprises a laser emission unit and a laser receiving unit, the laser emission unit and the laser receiving unit are arranged on opposite sides of the sound inlet channel and are arranged staggeredly along the sound inlet direction of the sound inlet channel. The laser emitted by the multiple groups of detection assemblies of the device is emitted and sensed at multiple angles in the sound inlet channel, the sensing of the sound wave signal is realized in multiple angular directions, the angle measurement of the sound wave detection is enriched, the direction of the sound wave is fully detected, and the sensitivity and resolution of the sound wave detection are improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of acoustic signal detection, and particularly relates to an acoustic wave detection device. BACKGROUND

[0002] The acoustic wave direction-of-arrival detection device is a device for determining the direction of a sound source. It has important value in many fields. Based on the difference of the propagation medium of acoustic waves, it can be divided into air direction-of-arrival detection, underwater direction-of-arrival detection and the like. Different propagation media correspond to different detection means.

[0003] There are various underwater acoustic signal measuring hydrophones, which can be summarized into two categories: scalar hydrophones and vector hydrophones. Among them, the vector hydrophone is a sensor that can simultaneously measure the sound pressure and vector information (such as water medium particle velocity, vibration acceleration or sound pressure gradient, etc.) in the sound field. Its working principle is based on the vibration of medium particles when the sound wave propagates in the water medium. This vibration is converted into an electrical signal by the sensitive element in the vector hydrophone. The scalar hydrophone is realized by using a sensitive element to detect the pressure change generated when the sound wave propagates through the medium. It can convert the pressure change of the underwater sound wave into an electrical signal, but it cannot determine the vector direction.

[0004] However, the current hydrophone measurement has poor directivity, and the resolution capability of the sound field angle is low. SUMMARY

[0005] The purpose of the embodiments of the present application is to provide an acoustic wave detection device, which aims to solve the problem of poor directivity of the current hydrophone measurement and low resolution capability of the sound field angle.

[0006] The above technical purpose of the present application is achieved by the following technical scheme:

[0007] An acoustic wave detection device comprises:

[0008] A mounting reference frame, a sound inlet channel is provided in the middle of the mounting reference frame;

[0009] A plurality of groups of detection components, a plurality of groups of the detection components are arranged on the mounting reference frame and distributed along the circumferential direction of the sound inlet channel, each group of the detection components comprises a laser emission unit and a laser receiving unit, the laser emission unit and the laser receiving unit are arranged on opposite sides of the sound inlet channel and are staggered along the sound inlet direction of the sound inlet channel, so that the laser emitted by the laser emission unit corresponding to the laser receiving unit passes through the sound inlet channel and forms an included angle with the sound inlet direction of the sound inlet channel.

[0010] In an implementable embodiment, the laser emission unit emits laser light in a direction corresponding to the sound inlet direction of the sound inlet channel.

[0011] In an implementable embodiment, the plurality of groups of the detection assembly are divided into a plurality of groups of first detection assembly and a plurality of groups of second detection assembly, and the plurality of groups of the first detection assembly and the plurality of groups of the second detection assembly are respectively arranged along the circumferential direction of the sound inlet channel; the first detection assembly comprises a first laser emission unit and a first laser receiving unit, the first laser emission unit is arranged on the upper part of the mounting reference frame, and the first laser receiving unit is arranged on the lower part of the mounting reference frame; the second detection assembly comprises a second laser emission unit and a second laser receiving unit, the second laser emission unit is arranged on the lower part of the mounting reference frame, and the second laser receiving unit is arranged on the upper part of the mounting reference frame.

[0012] In an implementable embodiment, the laser light emitted by the first laser emission unit of at least two groups of the plurality of groups of the first detection assembly is parallel to each other; and the laser light emitted by the second laser emission unit of at least two groups of the plurality of groups of the second detection assembly is parallel to each other.

[0013] In an implementable embodiment, at least one group of the first detection assembly and at least one group of the second detection assembly are arranged on opposite sides of the sound inlet channel, so that the laser light of the first detection assembly and the second detection assembly arranged oppositely intersects.

[0014] In an implementable embodiment, the plurality of groups of the first detection assembly and the plurality of groups of the second detection assembly are uniformly and spacedly arranged along the circumferential direction of the sound inlet channel.

[0015] In an implementable embodiment, it further comprises an optical path range increasing module, one end of the optical path range increasing module is connected with the laser emission unit for receiving the laser light emitted by the laser emission unit, and the other end of the optical path range increasing module is connected with the laser receiving unit, so as to increase the range of the laser light and then enter the laser receiving unit.

[0016] In an implementable embodiment, it further comprises a laser generation assembly, the laser generation assembly is arranged on the mounting reference frame and is connected with the laser emission unit of a plurality of groups of the detection assembly at the same time.

[0017] In an implementable embodiment, it further comprises a cable and an electronic warehouse, one end of the cable is connected with the detection assembly, and the other end of the cable is connected with the electronic warehouse.

[0018] In an implementable embodiment, a shell is further included, which is arranged outside the mounting reference frame, and a sound-transmitting plate is arranged on the shell and corresponds to the position of the sound inlet channel.

[0019] The sound wave detection device provided by the embodiment of the application has the advantages that: a plurality of detection assemblies are arranged in the circumferential direction of the sound inlet channel, and the laser emitting unit and the laser receiving unit of each detection assembly are arranged on the opposite sides of the sound inlet channel and are staggered along the sound inlet direction of the sound inlet channel, so that the laser emitted by the laser emitting unit to the corresponding laser receiving unit forms an included angle with the sound inlet direction of the sound inlet channel, the laser emitted by the plurality of detection assemblies is emitted and sensed at a plurality of angles in the sound inlet channel, the sensing of the sound wave signal is realized in a plurality of angular directions, the angle measurement of the sound wave detection is enriched, the direction of the sound wave is fully detected, and the sensitivity and resolution of the sound wave detection are improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 FIG. 1 is a perspective view of a sound wave detection device provided by an embodiment of the application;

[0021] Figure 2 FIG. 2 is a structural schematic view of a mounting reference frame provided by an embodiment of the application;

[0022] Figure 3 FIG. 3 is a sectional view of a sound wave detection device provided by an embodiment of the application;

[0023] Figure 4 FIG. 4 is a top view of a sound wave detection device provided by an embodiment of the application;

[0024] Figure 5 FIG. 5 is a structural schematic view of an optical path range increasing module provided by an embodiment of the application;

[0025] Figure 6 FIG. 6 is a structural schematic view of another sound wave detection device provided by an embodiment of the application.

[0026] In the drawings: 1, mounting reference frame; 2, sound inlet channel; 3, detection assembly; 31, laser emitting unit; 310, first detection assembly; 311, first laser emitting unit; 312, first laser receiving unit; 32, laser receiving unit; 320, second detection assembly; 321, second laser emitting unit; 322, second laser receiving unit; 4, optical path range increasing module; 41, module main body; 42, reflector; 5, laser generating assembly; 6, cable; 7, electronic bin; 8, shell; 9, sound-transmitting plate; 100, laser. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0028] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0030] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature.

[0031] The specific implementation of this application will be described in detail below with reference to specific embodiments.

[0032] like Figure 1 The image shown is a three-dimensional structural schematic diagram of a sound wave detection device provided in an embodiment of this application. The sound wave detection device provided in this embodiment includes:

[0033] Mounting reference frame 1, wherein a sound inlet channel 2 is provided through the middle of the mounting reference frame 1;

[0034] Several sets of detection components 3 are arranged on the mounting reference frame 1 and distributed circumferentially along the sound inlet channel 2. Each set of detection components 3 includes a laser emitting unit 31 and a laser receiving unit 32. The laser emitting unit 31 and the laser receiving unit 32 are respectively arranged on opposite sides of the sound inlet channel 2 and staggered along the sound inlet direction of the sound inlet channel 2, so that the laser 100 emitted by the laser emitting unit 31 to the corresponding laser receiving unit 32 passes through the sound inlet channel 2 and forms an angle with the sound inlet direction of the sound inlet channel 2.

[0035] It is understandable that the main principle of the acoustic wave detection device in this embodiment is that when sound waves propagate in a medium, the density of the medium changes, which in turn causes a change in the refractive index of the medium. When the frequency of the sound wave is low and the beam width is smaller than the wavelength of the sound wave, the spatial change in the refractive index of the medium causes the light to deflect or focus. When light passes through a space where a sound field exists, the change in the refractive index of the medium causes a change in the propagation path of the light. Therefore, by acquiring the spatial position of the optical signal and then performing inversion, the corresponding acoustic wave signal information can be obtained. In general, the acoustic wave detection device provided in this embodiment uses a laser emitted by the laser emitting unit 31 to pass through the acoustic channel 2. The acoustic channel 2 serves as the acousto-optic interaction zone where the sound wave and the laser interact, causing the propagation path of the measured laser to shift in the acoustic channel 2. The laser receiving unit 32 can measure the change in the laser shift over time, and by analyzing the change, the direction of arrival angle of the sound wave can be obtained.

[0036] It is understandable that, such as Figure 2 As shown, Figure 2 This is a schematic diagram of a mounting reference frame provided in this embodiment. Furthermore, in other embodiments, the mounting reference frame 1, in addition to the above, Figure 2 As shown, it may also include, for example Figure 1 The base plate shown serves as the mounting reference frame 1. In this embodiment, the main body of the mounting reference frame 1 is octagonal, with a through cavity in the middle serving as a sound inlet channel 2. The sound inlet channel 2 is mainly used to sense sound waves and act as the acousto-optic interaction zone where sound waves and lasers interact. Its shape is not strictly required; it can be a cavity with inlets and outlets, or as in this embodiment. Figure 1The structure of the coupling shell 8 forms a passage in the middle part. If there is a sound wave in the environment to be detected, the sound wave can enter the sound wave passage 2 from the two end openings of the sound wave passage 2. The emitted and received laser 100 between the laser emitting unit 31 and the laser receiving unit 32 of the detection assembly 3 can pass through the sound wave passage 2 for sound wave sensing detection. In the embodiment, the independent mounting reference frame 1 is provided, and the detection assembly 3 is arranged on the mounting reference frame 1. The laser emitting unit 31 and the laser receiving unit 32 of the detection assembly 3 are separated from the shell 8 and other parts of the sound wave detection device. When the shell 8 is affected by the environment and vibrates, the resonance of the laser emitting unit 31 and the laser receiving unit 32 of the detection assembly 3 and other components is avoided. The influence of environmental noise on the signal is inhibited, and the signal-to-noise ratio of the acousto-optic sensing signal is improved.

[0037] It can be understood that the arrangement of several groups of detection assemblies 3 on the mounting reference frame 1 and along the circumferential direction of the sound wave passage 2 is mainly to arrange several groups of detection assemblies 3 on the mounting reference frame 1, so as to form a plurality of laser beams 100 in different directions in the space of the sound wave passage 2, so as to form a plurality of sensing lasers in different angles in the sound wave passage 2 region, and to detect sound waves in different directions, improve the sensitivity and range of sound wave detection, and facilitate the detection and confirmation of sound waves.

[0038] It is understood that the laser emitting unit 31 mainly refers to a laser emitting device, which can be a device that generates and emits laser light, such as a laser generator, or it can be a device used only for relaying, emitting, and adjusting laser light. For example, in this embodiment, the laser emitting unit 31 refers to a collimator-type laser adjustment and emitting device, which mainly adjusts and emits the laser light generated by the laser generating device, such as the separate laser generating component 5 included in this embodiment. Whether the laser emitting unit 31 has the function of generating laser light can be selected and set according to actual needs by those skilled in the art. For example, in this embodiment, the laser emitting unit 31 is a collimator that does not have the function of generating laser light. The laser generating component 5 is set to provide laser light in a centralized and unified manner. In other embodiments, the laser emitting unit 31 can have the functions of generating and emitting laser light at the same time, so there is no need to set up a separate laser generating component 5. The specific selection can be made according to actual needs, which will not be further described here. Similarly, the laser receiving unit 32 can be a receiver that only includes sensing and receiving functions, or it can be an electronic device that includes signal processing capabilities. For example, in this embodiment, a four-quadrant position detector is used as an example. It can convert the laser position information into an electrical signal output, realize laser sensing of acoustic wave signals, and convert the acoustic wave signals into electrical signal outputs. The laser receiving unit 32 can also be a simple receiving device, such as a collimator. In addition, it can be combined with a laser detection device with signal processing capabilities, such as a four-quadrant position detector. In this embodiment, the laser emitting unit 31 is used as a collimator and the laser receiving unit 32 is used as a four-quadrant position detector for explanation. In general, the laser emitting unit 31 and the laser receiving unit 32 can be any electronic devices used in the prior art for emitting lasers and sensing laser position change information, and will not be further described or illustrated here.

[0039] Furthermore, the laser emitting unit 31 and the laser receiving unit 32 are respectively arranged on opposite sides of the sound inlet channel 2. This mainly means that the laser emitted by the laser emitting unit 31 to the laser receiving unit 32 can pass through the sound inlet channel 2, and the laser path formed between them is as follows: Figures 1-2 The laser beam can pass through either the center or a non-center position of the sound inlet channel 2. The specific configuration can be easily adjusted according to actual needs. Furthermore, the laser emitting unit 31 and the laser receiving unit 32 can be installed on or through the inner wall of the sound inlet channel 2, or they can be mounted on the mounting reference frame 1 with necessary supporting and fixing structures. These details will not be elaborated further here. Additionally, a glass window can be provided on the inner wall of the sound inlet channel 2 to facilitate laser entry and exit; the specific structure will not be described further here.

[0040] In the embodiment, the laser emission unit 31 emits laser light in a direction corresponding to the direction in which the laser receiving unit 32 receives the laser light, which is the same as or opposite to the sound inlet direction of the sound inlet channel 2.

[0041] It can be understood that the sound inlet direction of the sound inlet channel 2 can be a specified direction, such as a direction along the sound inlet channel 2. Figure 1 As shown in FIG. 1, the upper opening is the sound inlet port, and the lower opening is the sound outlet port. The laser light emitted by the laser emission unit 31 corresponding to the laser receiving unit 32 can be emitted along the upper opening of the sound inlet channel 2 to the lower opening, or can be emitted along the rear opening of the sound inlet channel 2 to the front opening. The main point is to form a multi-directional and multi-angle laser route. In the embodiment, the direction is mainly the inclined direction, and if necessary, the horizontal and vertical transverse directions opposite to the sound inlet direction of the sound inlet channel 2 can also be included. The sound wave signals transmitted in different directions can be sensed to improve the detection sensitivity and accuracy. The above examples of the sound inlet port and the sound outlet port are only used for brief description and are not strictly limited. In fact, through the arrangement of the detection assembly 3 in the embodiment, both ends of the sound inlet channel 2 can be sound inlet ports, and different directions of sound waves can be detected in all directions.

[0042] In the embodiment, as shown in FIG. 1, Figure 3 Figure 3 is a cross-sectional view of a sound wave detection device provided in the embodiment, and in combination with Figures 1-2 In the embodiment, a plurality of groups of the detection assembly 3 are divided into a plurality of groups of first detection assemblies 310 and a plurality of groups of second detection assemblies 320. The plurality of groups of the first detection assemblies 310 and the plurality of groups of the second detection assemblies 320 are respectively arranged along the circumferential direction of the sound inlet channel 2. The first detection assembly 310 includes a first laser emission unit 311 and a first laser receiving unit 312. The first laser emission unit 311 is arranged at the upper portion of the mounting reference frame 1, and the first laser receiving unit 312 is arranged at the lower portion of the mounting reference frame 1. The second detection assembly 320 includes a second laser emission unit 321 and a second laser receiving unit 322. The second laser emission unit 321 is arranged at the lower portion of the mounting reference frame 1, and the second laser receiving unit 322 is arranged at the upper portion of the mounting reference frame 1.

[0043] Specifically, as shown in FIG. 1, Figure 3 ​For example, the first laser emitting unit 311 of the first detection assembly 310 is arranged on the right upper part of the mounting reference frame 1, and the first laser receiving unit 312 is arranged on the left lower part of the mounting reference frame 1 (as the light path range increasing module 4 is also used in the embodiment to first receive and process the laser, the arrangement position of the first laser receiving unit 312 is not obvious, but those skilled in the art can understand and implement the existing implementation mode of the application according to the above description, and mainly the laser inclination direction is arranged); the second laser emitting unit 321 of the second detection assembly 320 is arranged on the left lower part of the mounting reference frame 1, and the second laser receiving unit 322 of the second detection assembly 320 is arranged on the right upper part of the mounting reference frame 1.

[0044] In addition, in addition to the first laser emitting unit 311 arranged on the upper part of the mounting reference frame 1 and the second laser emitting unit 321 arranged on the lower part of the mounting reference frame 1, in other embodiments, the first laser emitting unit 311 can also be arranged on the lower part of the mounting reference frame 1, and the second laser emitting unit 321 can be arranged on the upper part of the mounting reference frame 1, mainly to form laser rays that exist at the same time as the sound inlet direction of the sound inlet channel 2 and opposite to the sound inlet direction of the sound inlet channel 2, for example, the first laser emitting unit 311 of the first detection assembly 310 is arranged on the right lower part of the mounting reference frame 1, and the first laser receiving unit 312 is arranged on the left upper part of the mounting reference frame 1, and the second laser emitting unit 321 of the second detection assembly 320 is arranged on the right upper part of the mounting reference frame 1, and the second laser receiving unit 322 is arranged on the left lower part of the mounting reference frame 1. Further, in more other embodiments, the first laser emitting unit 311 of the first detection assembly 310 can be arranged on the left lower part of the mounting reference frame 1, and the first laser receiving unit 312 can be arranged on the right upper part of the mounting reference frame 1, and the second laser emitting unit 321 of the second detection assembly 320 can be arranged on the right lower part of the mounting reference frame 1, and the second laser receiving unit 322 can be arranged on the left upper part of the mounting reference frame 1.

[0045] In addition, the first laser emitting unit 311 can be arranged on the lower part of the mounting reference frame 1, and the second laser emitting unit 321 can be arranged on the upper part of the mounting reference frame 1, and the laser receiving unit is arranged correspondingly, and the direction of the laser ray is unified. In general, mainly a plurality of directions of laser rays inclined to the sound inlet direction of the sound inlet channel 2 are formed, and more are not further listed here, and those skilled in the art can understand and implement according to the above description.

[0046] In the embodiment, as shown in Figure 4 , the first detection assembly 310 and the second detection assembly 320 are arranged on the mounting reference frame 1. Figure 4is a top view structural schematic diagram of a sound wave detection device provided in the embodiment. The laser emitted by the first laser emitting unit 311 of at least two groups of the first detection assembly 310 is parallel to each other. The laser emitted by the second laser emitting unit 321 of at least two groups of the second detection assembly 320 is parallel to each other.

[0047] Specifically, as shown in Figure 4 In the embodiment, the laser emitted by the first laser emitting unit 311 of the three groups of first detection assemblies 310 is parallel (lateral) to each other. Similarly, the laser emitted by the second laser emitting unit 321 of the three groups of second detection assemblies 320 is parallel (longitudinal) to each other. At least two groups of first detection assemblies 310 or second detection assemblies 320 that are parallel to each other can further simplify the measurement structure of the device, reasonably reduce the complexity of the detection data, reduce the requirement for the calculation amount of the direction of arrival, and improve the calculation speed of the device for the measurement result. It is beneficial to improve the measurement accuracy of the device. More specifically, as shown in Figure 4 In the embodiment, by designing three groups of first detection assemblies 310 that are parallel to each other and three groups of second detection assemblies 320 that are parallel to each other, a 3x3 cross inclined laser layout mode is formed, high-sensitivity sensing of full-size sound signals in the measurement angle range is achieved, and in use, in combination with Figure 3 As shown in the left side, the left side inclined incoming wave signal mainly acts on the right side laser beam, and the right side inclined incoming wave signal mainly acts on the left side laser beam, thereby achieving high-sensitivity sensing of left and right incoming wave signals. In addition, if necessary, the number of layers of 3x3 cross inclined lasers can be increased, such as being arranged as 3x3 cross 2-layer inclined lasers, and more other forms are not further listed and described here.

[0048] In the embodiment, at least one group of the first detection assembly 310 and at least one group of the second detection assembly 320 are arranged on both sides of the sound inlet channel 2, so that the lasers of the first detection assembly 310 and the second detection assembly 320 arranged oppositely intersect each other, the overall structure is reasonable and regular, which is convenient for design and use, and improves the accuracy of detection.

[0049] It can be understood that in the foregoing, the first and second detection assemblies 320 are arranged opposite to each other or the first detection assemblies 310 or the second detection assemblies 320 are arranged parallel to each other, and each has its own advantages, but other possible arrangements of the detection assemblies 3 are not excluded. For example, in other embodiments, a plurality of groups of the first detection assemblies 310 and a plurality of groups of the second detection assemblies 320 are uniformly spaced on the circumference of the sound inlet channel 2. Specifically, the first detection assemblies 310 and the second detection assemblies 320 can be uniformly spaced on the circumference of the sound inlet channel 2 in sequence or out of sequence. It should be noted that the uniform spacing is different from the parallel arrangement described above, and the laser path can be formed at different angles on the circumference of the sound inlet channel 2, thereby ensuring the detection effect in all directions.

[0050] In the present embodiment, the optical path range increasing module 4 is also included, one end of the optical path range increasing module 4 is connected with the laser emitting unit 31 for receiving the laser emitted by the laser emitting unit 31, and the other end is connected with the laser receiving unit 32, so that the laser is increased in range and enters the laser receiving unit 32.

[0051] It can be understood that the optical path range increasing refers to increasing the length of the optical path in the optical system to improve the optical performance or meet the specific application requirements, which can be achieved in various ways, such as using mirrors, lenses or other optical elements to lengthen the optical path. For example, as shown in Figure 5 The optical path range increasing module 4 is arranged on the mounting reference frame 1 in the present embodiment, and the optical path range increasing module 4 mainly comprises two mirrors 42 arranged opposite to each other in a module body 41, the distance between the incident light and the outgoing light is 60 mm, the distance between the two mirrors 42 is 50 mm, the light is reflected 30 times in total, the total optical path is 1550 mm, the single-side reflected light spot distance is 4 mm, the light spot size is 1 mm, and there is a 3 mm empty area between the two adjacent light spots. Considering the uneven coating within 0.5 mm of the edge of the mirror, the outgoing light is not more than 1.25 mm, which can ensure that the outgoing light is not blocked. By designing the optical path range increasing module 4, the sensitivity of the acousto-optic sensing detection can be improved. For example, in the present embodiment, the optical path range increasing module 4 can be arranged in a space of 60 mm x 50 mm x 12 mm to achieve an optical path range increasing of 1550 mm, thereby improving the sensitivity of the acousto-optic sensing detection by about 18 dB. It can be understood that the incident light end of the optical path range increasing module 4 in the present embodiment can be directly aligned with the laser emitting unit 31 for receiving the laser and increasing the range to be emitted to the laser receiving unit 32 for processing.

[0052] In the present embodiment, as shown inFigure 1 As shown, it also includes a laser generating component 5, which is mounted on the mounting reference frame 1 and is simultaneously connected to the laser emitting units 31 of multiple sets of the detection components 3.

[0053] It is understood that the laser generating component 5 can be a conventional laser or a laser generator, and the specific type can be selected from existing technologies according to actual needs. No strict limitations are imposed here. The main point is that in this embodiment, after the laser generating component 5 generates laser light, it is simultaneously emitted to multiple first laser emitting units 311, which ensures the uniformity of the laser beam and saves space and equipment costs. It is understood that the number of laser generating components 5 can be set according to actual needs, such as allocating corresponding laser generating components 5 according to the number of different detection components 3. In this embodiment, for example... Figure 1 As shown, two laser generating components 5 are set up, corresponding to the first detection component 310 and the second detection component 320 respectively. That is, the laser of the first detection component 310 is generated by one laser generating component 5, and the laser of the second detection component 320 is generated by another laser generating component 5. More specific situations can be simply adjusted according to actual needs, and will not be described further here.

[0054] In one feasible embodiment, such as Figure 6 The diagram shown is an overall structural schematic of another acoustic wave detection device provided in this application embodiment. The acoustic wave detection device also includes a cable 6 and an electronic compartment 7. One end of the cable 6 is connected to the detection component 3, and the other end is connected to the electronic compartment 7.

[0055] It is understood that, through the arrangement of cable 6 and electronic compartment 7 in this embodiment, other electronic devices, such as control units and power supplies, can be placed inside electronic compartment 7, thereby avoiding the impact of electronic devices inside electronic compartment 7 on the detection effect of detection component 3. At the same time, it can also make reasonable use of space and avoid space congestion in the detection sensing area. In addition, wireless transmission function can be set in electronic compartment 7 according to actual needs, so as to realize the real-time wireless detection feedback of the acoustic wave detection device in this embodiment. More specific settings will not be further described here.

[0056] In this embodiment, as Figure 6 As shown, it also includes a housing 8, which covers the outside of the mounting reference frame 1, and a sound-permeable plate 9 is provided on the housing 8 corresponding to the position of the sound inlet channel 2.

[0057] It can be understood that the shell 8 in the embodiment can be integrally sealed outside the installation reference frame 1, so as to achieve the sealing protection of the installation reference frame 1 and the detection assembly 3 on the installation reference frame 1, isolate the sound and light sensing area from the external environment, and by arranging the sound transmission plate 9, the sound wave can enter from the sound transmission plate 9, the sound signal enters the sound and light sensing area, and the water flow, silt and impurities are isolated outside, so as to avoid affecting the laser, and improve the beam sensitivity of the whole sound wave detection device and the stability of the system. At the same time, as shown in Figure 1 The shell 8 can also include the bottom plate part of the installation reference frame 1 and the part arranged on the inner wall of the sound inlet channel 2. The shell 8 as a whole can include the installation reference frame 1 and the detection assembly 3, and isolate the sound inlet channel 2 area. The sound inlet channel 2 is isolated by the combination of the middle part of the shell 8 and the sound transmission plate 9. The middle part of the shell 8 can be arranged in the form of a glass window to enable the laser rays of the laser emitting unit and the laser receiving unit to enter and exit. The specific implementation can be understood and realized according to the above description.

[0058] The sound wave detection device provided in the embodiment is used in the underwater environment. The underwater environment is complex, especially in the marine environment. The sound signal is chaotic and unknown. The laser in the parallel sound inlet channel 2 or the vertical sound inlet channel 2 cannot accurately aim at the incoming wave direction. The sensitivity of the sound and light sensing of the parallel or vertical beam laser is low when the lateral wave comes. The sound wave detection device of the embodiment realizes the sensing of the sound signal in multiple angle directions by arranging multiple detection assemblies 3 with an included angle (equivalent to an inclination) relative to the sound inlet direction. In specific use, one of the detection assemblies 3 is taken as an example. The laser beam emitted by the laser generating assembly 5 is emitted to the sound inlet channel 2 through the laser emitting unit 31. The laser and the sound signal interact in the sound inlet channel 2 to deflect. The laser carries the sound signal information at this time. The laser carrying the sound signal information propagates to the optical path range increasing module 4, and then acts on the laser receiving unit 32. The laser receiving unit 32 converts the position information of the laser beam into an electrical signal output. Thus, the laser sensing sound signal is realized, and the sound wave detection is realized by converting the sound signal into an electrical signal output.

[0059] The sound wave detection device provided by the embodiment of the present application has the following advantages: a plurality of detection assemblies 3 are arranged on the circumference of the sound inlet channel 2, and the laser emitting unit 31 and the laser receiving unit 32 of each detection assembly 3 are respectively arranged on the opposite sides of the sound inlet channel 2 and are staggered along the sound inlet direction of the sound inlet channel 2, so that the laser emitted by the laser emitting unit 31 to the corresponding laser receiving unit 32 forms an included angle with the sound inlet direction of the sound inlet channel 2, the laser emitted by the plurality of detection assemblies 3 is emitted and sensed at multiple angles in the sound inlet channel 2, the sensing of the sound wave signal in multiple angle directions is realized, the angle measurement of the sound wave detection is enriched, the direction of the sound wave is fully detected, and the sensitivity and resolution of the sound wave detection are improved.

[0060] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A sound wave detection device, characterized in that, include: The mounting reference frame has a sound inlet channel running through its middle section. Several sets of detection components are arranged on the mounting reference frame and distributed circumferentially along the sound inlet channel. Each set of detection components includes a laser emitting unit and a laser receiving unit. The laser emitting unit and the laser receiving unit are respectively arranged on opposite sides of the sound inlet channel and staggered along the sound inlet direction of the sound inlet channel, so that the laser emitted by the laser emitting unit towards the corresponding laser receiving unit passes through the sound inlet channel and forms an angle with the sound inlet direction of the sound inlet channel. The laser direction emitted by the laser emitting unit towards the corresponding laser receiving unit includes both the same as the sound inlet direction of the sound inlet channel and the opposite to the sound inlet direction of the sound inlet channel. The several sets of detection components are divided into several groups. A first detection component and several groups of second detection components are evenly spaced and distributed along the circumference of the sound inlet channel. The first detection component includes a first laser emitting unit and a first laser receiving unit. The first laser emitting unit is disposed on the upper part of the mounting reference frame, and the first laser receiving unit is disposed on the lower part of the mounting reference frame. The second detection component includes a second laser emitting unit and a second laser receiving unit. The second laser emitting unit is disposed on the lower part of the mounting reference frame, and the second laser receiving unit is disposed on the upper part of the mounting reference frame, so as to form a laser beam inclined to the sound inlet direction for sensing inclined incoming wave signals perpendicular to the laser direction.

2. The acoustic wave detection device according to claim 1, characterized in that, In a plurality of groups of first detection components, at least two groups of first laser emitting units emit lasers that are parallel to each other toward the first laser receiving unit; in a plurality of groups of second detection components, at least two groups of second laser emitting units emit lasers that are parallel to each other toward the second laser receiving unit.

3. The acoustic wave detection device according to claim 1, characterized in that, At least one set of the first detection components and at least one set of the second detection components are disposed opposite each other on both sides of the sound inlet channel, so that the lasers of the oppositely disposed first detection components and second detection components intersect.

4. The acoustic wave detection device according to claim 1, characterized in that, It also includes an optical path extension module, one end of which is connected to receive the laser emitted by the laser emitting unit, and the other end is connected to the laser receiving unit to extend the laser path before it enters the laser receiving unit.

5. The acoustic wave detection device according to claim 1, characterized in that, It also includes a laser generating component, which is mounted on the mounting reference frame and is simultaneously connected to the laser emitting units of multiple sets of the detection components.

6. The acoustic wave detection device according to claim 1, characterized in that, It also includes cables and an electronic compartment, with one end of the cables connected to the detection component and the other end connected to the electronic compartment.

7. The acoustic wave detection device according to claim 1, characterized in that, It also includes a housing, which covers the outside of the mounting reference frame, and a sound-permeable plate is provided on the housing corresponding to the position of the sound inlet channel.

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