Sound wave detection device

Abstract

The invention is suitable for the technical field of sound signal detection, and provides a sound wave detection device. The sound wave detection device comprises a mounting reference frame, and a sound inlet channel is arranged in the middle of the mounting reference frame in a penetrating manner; the multiple detection assemblies are arranged on the installation reference frame and distributed in the circumferential direction of the sound inlet channel, and each detection assembly comprises a laser emitting unit and a laser receiving unit; the laser emitting unit and the laser receiving unit are arranged on the two opposite side faces of the sound inlet channel respectively and arranged in a staggered mode in the sound inlet direction of the sound inlet channel. According to the device, laser emitted by the multiple groups of detection assemblies is emitted and sensed in the sound inlet channel at multiple angles, sensing of sound wave signals in multi-angle directions is achieved, angle measurement of sound wave detection is enriched, the direction of sound waves is fully detected, and the sensitivity and the resolution capability of sound wave detection are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of acoustic signal detection, and in particular relates to an acoustic wave detection device. Background Art

[0002] The sound wave arrival direction detection device is a device used to determine the direction of the sound source. It has important value in many fields. Based on the difference in the propagation medium of the sound wave, it can be divided into air arrival direction detection, underwater arrival direction detection, etc. Different propagation media correspond to different detection methods.

[0003] There are many types of hydrophones for underwater acoustic signal measurement, 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 in the sound field (such as the velocity of water medium particles, vibration acceleration or sound pressure gradient, etc.). Its working principle is based on the fact that when sound waves propagate in the water medium, the medium particles will vibrate, and this vibration is converted into an electrical signal through the sensitive element in the vector hydrophone. The scalar hydrophone uses sensitive elements to detect the pressure changes generated when sound waves propagate through the medium. It can convert the pressure changes of underwater sound waves into electrical signals, but it cannot determine the vector direction.

[0004] However, current hydrophone measurements have poor directivity and low resolution of sound field angles. Summary of the invention

[0005] The purpose of the embodiments of the present application is to provide an acoustic wave detection device, aiming to solve the problems of poor directivity and low resolution of sound field angles in current hydrophone measurements.

[0006] The above technical objectives of this application are achieved through the following technical solutions:

[0007] An acoustic wave detection device, comprising:

[0008] An installation reference frame, wherein a sound inlet channel is provided through the middle of the installation reference frame;

[0009] A plurality of groups of detection components are arranged on the mounting reference frame and distributed along the circumference of the sound inlet channel, each group of the detection components comprises a laser emitting unit and a laser receiving unit, the laser emitting unit and the laser receiving unit are respectively arranged on two 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 to 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.

[0010] In an achievable embodiment, the direction of the laser emitted by the laser emitting unit to the corresponding laser receiving unit includes the same direction as the sound input direction of the sound input channel and the opposite direction to the sound input direction of the sound input channel.

[0011] In a feasible embodiment, several groups of the detection components are divided into several groups of first detection components and several groups of second detection components, and several groups of the first detection components and several groups of the second detection components are respectively 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 arranged at the upper part of the mounting reference frame, and the first laser receiving unit is arranged at 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 arranged at the lower part of the mounting reference frame, and the second laser receiving unit is arranged at the upper part of the mounting reference frame.

[0012] In a feasible embodiment, the lasers emitted by the first laser emitting units of at least two groups among several groups of the first detection components to the first laser receiving unit are parallel to each other; and the lasers emitted by the second laser emitting units of at least two groups among several groups of the second detection components to the second laser receiving unit are parallel to each other.

[0013] In a feasible embodiment, at least one group of the first detection components and at least one group of the second detection components are arranged on both sides of the sound inlet channel relative to each other, so that lasers of the first detection components and the second detection components arranged relatively to each other intersect.

[0014] In a feasible embodiment, a plurality of groups of the first detection components and a plurality of groups of the second detection components are evenly spaced and distributed in a circumferential direction of the sound inlet channel.

[0015] In a feasible embodiment, it also includes an optical path range extension module, one end of which is used to receive the laser emitted by the laser emitting unit, and the other end is connected to the laser receiving unit to extend the range of the laser and enter the laser receiving unit.

[0016] In a feasible embodiment, it also includes a laser generating component, which is arranged on the mounting reference frame and is simultaneously connected to the laser emitting units of multiple groups of the detection components.

[0017] In a feasible embodiment, it further includes a cable and an electronic warehouse, one end of the cable is connected to the detection component, and the other end is connected to the electronic warehouse.

[0018] In a feasible embodiment, it further includes a shell, wherein the shell cover is arranged on the outside of the mounting reference frame, and a sound-permeable panel is arranged on the shell corresponding to the position of the sound inlet channel.

[0019] An acoustic wave detection device provided in an embodiment of the present application has the outstanding advantage that: by arranging multiple groups of detection components in the circumferential direction of the sound inlet channel, and the laser emitting unit and the laser receiving unit of each group of detection components are respectively arranged on two 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 to the corresponding laser receiving unit forms an angle with the sound inlet direction of the sound inlet channel, and the lasers emitted by the multiple groups of detection components are emitted and sensed at various angles in the sound inlet channel, thereby realizing the sensing of acoustic wave signals in multiple angles and directions, enriching the angle measurement of acoustic wave detection, fully detecting the direction of the acoustic wave, and improving the sensitivity and resolution of acoustic wave detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A three-dimensional structural diagram of an acoustic wave detection device provided in an embodiment of the present application;

[0021] Figure 2 A schematic diagram of the structure of a mounting reference frame provided in an embodiment of the present application;

[0022] Figure 3 A cross-sectional view of an acoustic wave detection device provided in an embodiment of the present application;

[0023] Figure 4 A schematic diagram of a top view of an acoustic wave detection device provided in an embodiment of the present application;

[0024] Figure 5 A schematic diagram of the structure of an optical path range extender module provided in an embodiment of the present application;

[0025] Figure 6 A schematic diagram of the overall structure of another acoustic wave detection device provided in an embodiment of the present application.

[0026] In the figure: 1. Installation reference frame; 2. Sound inlet channel; 3. Detection component; 31. Laser emitting unit; 310. First detection component; 311. First laser emitting unit; 312. First laser receiving unit; 32. Laser receiving unit; 320. Second detection component; 321. Second laser emitting unit; 322. Second laser receiving unit; 4. Optical path range extension module; 41. Module body; 42. Reflector; 5. Laser generating component; 6. Cable; 7. Electronic compartment; 8. Shell; 9. Sound-transparent board; 100. Laser. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" refers to two or more, unless otherwise clearly and specifically defined.

[0029] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" or "above" a second feature includes that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

[0031] The specific implementation of the present application is described in detail below in conjunction with specific embodiments.

[0032] like Figure 1 , which is a schematic diagram of a three-dimensional structure of an acoustic wave detection device provided in an embodiment of the present application, and the acoustic wave detection device provided in an embodiment of the present application includes:

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

[0034] A plurality of groups of detection components 3 are arranged on the mounting reference frame 1 and distributed along the circumference of the sound inlet channel 2, each group of the 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 two 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 can be understood that the main principle of the acoustic wave detection device in this embodiment is that when the acoustic wave propagates in the medium, the density of the medium will change, and then the refractive index of the medium will change. When the frequency of the acoustic wave is low and the beam width is smaller than the wavelength of the acoustic wave, the spatial change of the refractive index of the medium causes the light to deflect or focus; when the light passes through a space where a sound field exists, the change in the refractive index of the medium will cause the propagation path of the light to change. Therefore, by obtaining the spatial position of the optical signal, the corresponding acoustic wave signal information can be obtained through inversion. In general, the acoustic wave detection device provided in this embodiment is that the laser emitted by the laser emitting unit 31 passes through the sound inlet channel 2, and the sound inlet channel 2 serves as the acoustic and optical action area where the sound wave and the laser act, so that the propagation path of the measuring laser is offset and changed in the sound inlet channel 2, and the laser receiving unit 32 can measure the change of the laser offset over time, and the wave arrival direction angle of the sound wave is obtained by analyzing the change.

[0036] It is understandable that if Figure 2 As shown, Figure 2 This is a schematic diagram of the structure of a mounting reference frame provided in this embodiment. In addition, in other embodiments, the mounting reference frame 1 is as follows Figure 2 As shown in Figure 1 The bottom plate portion shown in the figure is used as the installation reference frame 1 as a whole. In this embodiment, the main body of the installation reference frame 1 is designed in an octagonal shape, and a through cavity is set in the middle part as the sound inlet channel 2. The sound inlet channel 2 is mainly used to sense sound waves and serve as the sound and light action area for sound waves and lasers to act. The channel shape is not strictly required, and it can be a cavity with an inlet and outlet, or as in this embodiment Figure 1The structure shown in the figure combined with the shell 8 forms a channel in the middle. If there are sound waves in the detected environment, the sound waves can enter the sound inlet channel 2 from the openings at both ends of the sound inlet channel 2. The laser 100 emitted and received between the laser emitting unit 31 and the laser receiving unit 32 included in the detection component 3 can pass through the sound inlet channel 2 for sound wave sensing detection. In this embodiment, by providing an independent mounting reference frame 1 and arranging the detection components 3 on the mounting reference frame 1, the laser emitting unit 31 and the laser receiving unit 32 of the detection component 3 can be separated from the shell 8 and other parts of the sound wave detection device, so as to avoid the resonance of components such as the laser emitting unit 31 and the laser receiving unit 32 of the detection component 3 when the shell 8 is affected by the environment and vibrates, thereby suppressing the influence of environmental noise on the signal and improving the signal-to-noise ratio of the acousto-optic sensing signal.

[0037] It can be understood that the arrangement of several groups of detection components 3 on the mounting reference frame 1 and distributed circumferentially along the sound inlet channel 2 mainly refers to that several groups of detection components 3 are respectively arranged on the mounting reference frame 1, thereby forming multiple lasers 100 in different directions in the space of the sound inlet channel 2, so as to form multi-angle sensing lasers in the area of ​​the sound inlet channel 2, 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 can be understood that the laser emitting unit 31 mainly refers to a laser emitting device, which can be a device that can generate and emit laser, such as a laser, or it can be a device that is only used to transfer, emit, and adjust laser. For example, the laser emitting unit 31 in the present embodiment refers to a laser adjustment and emitting device such as a collimator, which mainly adjusts the laser generated by a laser generating device such as the separate laser generating component 5 included in the present embodiment and then emits it. As for whether the laser emitting unit 31 has the function of laser generation, technical personnel in this field can choose to set it according to actual needs. For example, in the present embodiment, the laser emitting unit 31 is taken as a collimator and does not have the laser generation function. For example, in combination with the setting of the laser generating component 5 to centrally and uniformly provide laser, in other embodiments, the laser emitting unit 31 may have the functions of generating and emitting lasers at the same time, so there is no need to set up a laser generating component 5 separately. The specific selection can be based on actual needs and will not be further described here. Similarly, for the laser receiving unit 32, it can be a receiver that only includes the sensing and receiving function, or it can be an electronic device that includes signal processing capabilities. For example, in this embodiment, taking the four-quadrant position detector as an example, it can convert the position information of the laser into an electrical signal output, realize laser sensing of the sound wave signal, and convert the sound wave signal into an electrical signal output. The laser receiving unit 32 can also be a simple receiving device. For example, the laser receiving unit 32 can also be a collimator, and it can be combined with a laser detection device with signal processing capabilities such as a four-quadrant position detector to achieve this. In this embodiment, the laser emitting unit 31 is a collimator, and the laser receiving unit 32 is a four-quadrant position detector. For example, the laser emitting unit 31 and the laser receiving unit 32 can be selected from electronic devices used in the prior art for emitting lasers and sensing laser position change information, and no further description or examples are given 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, which 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 route formed between the two is as follows: Figure 1-2 As shown in the figure, it can be through the center position of the sound inlet channel 2 or through the non-center position. The specific setting can be simply adjusted according to actual needs. In addition, the laser emitting unit 31 and the laser receiving unit 32 can be set on the inner wall of the sound inlet channel 2 or through the inner wall, or the necessary supporting and fixing structure can be set on the installation reference frame 1, which will not be further described here. In addition, a glass window can be set on the inner wall of the sound inlet channel 2 to facilitate the entry and exit of the laser, and the specific structure will not be further described here.

[0040] In this embodiment, the direction of the laser emitted by the laser emitting unit 31 to the corresponding laser receiving unit 32 includes the same direction as the sound input direction of the sound input channel 2 and the opposite direction to the sound input direction of the sound input channel 2 .

[0041] It is understandable that the sound input direction of the sound input channel 2 can be a specified direction, such as Figure 1 As shown in , the upper opening is the sound inlet and the lower opening is the sound outlet, then the laser emitted by the laser receiving unit 32 corresponding to the laser emitting unit 31 can be emitted along the upper opening of the sound inlet channel 2 to the lower opening, or along the rear opening of the sound inlet channel 2 to the front opening, mainly to form multi-directional and multi-angle laser routes, wherein along a certain direction refers to the presence of a component of the vector direction in this direction, in this embodiment it is mainly an inclined direction, and when necessary it can also include horizontal and vertical lateral directions relative to the sound inlet direction along the sound inlet channel 2, so as to sense sound wave signals from different directions and improve detection sensitivity and accuracy, the above examples of sound inlet and sound outlet are only used for brief explanation, not strict limitation, in fact, through the setting of the detection component 3 of this embodiment, the openings at both ends of the sound inlet channel 2 can be sound inlets, and sound waves in different directions can be detected in all directions.

[0042] In this embodiment, if Figure 3 As shown, Figure 3 is a cross-sectional view of an acoustic wave detection device provided in this embodiment, combined with Figure 1-2 As shown in, several groups of the detection components 3 are divided into several groups of first detection components 310 and several groups of second detection components 320, and several groups of the first detection components 310 and several groups of the second detection components 320 are respectively distributed along the circumference of the sound inlet channel 2; the first detection component 310 includes a first laser emitting unit 311 and a first laser receiving unit 312, the first laser emitting unit 311 is arranged at the upper part of the mounting reference frame 1, and the first laser receiving unit 312 is arranged at the lower part of the mounting reference frame 1; the second detection component 320 includes a second laser emitting unit 321 and a second laser receiving unit 322, the second laser emitting unit 321 is arranged at the lower part of the mounting reference frame 1, and the second laser receiving unit 322 is arranged at the upper part of the mounting reference frame 1.

[0043] Specifically, Figure 3For example, the first laser emitting unit 311 of the first detection component 310 is arranged on the upper right side of the mounting reference frame 1, and the first laser receiving unit 312 is arranged on the lower left side of the mounting reference frame 1 (because the optical path extension module 4 is also used in this embodiment to first receive and process the laser, the setting position of the first laser receiving unit 312 is not obvious, but the technical personnel in this field can realize the feasible method of the present application according to the above description, mainly to realize the inclined direction setting of the laser), so that the laser route of the first detection component 310 forms an angle with respect to the sound input direction of the sound input channel 2; the second laser emitting unit 321 of the second detection component 320 is arranged on the lower left side of the mounting reference frame 1, and the second laser receiving unit 322 of the second detection component 320 is arranged on the upper right side of the mounting reference frame 1.

[0044] In addition, in addition to the first laser emitting unit 311 being arranged at the upper part of the mounting reference frame 1 and the second laser emitting unit 321 being arranged at the lower part of the mounting reference frame 1, in other embodiments, the first laser emitting unit 311 can also be arranged at the lower part of the mounting reference frame 1 and the second laser emitting unit 321 can be arranged at the upper part of the mounting reference frame 1, mainly to form laser rays that are simultaneously the same as the sound input direction of the sound input channel 2 and opposite to the sound input direction of the sound input channel 2. For example, the first laser emitting unit 311 of the first detection component 310 is arranged at the lower right part of the mounting reference frame 1, the first laser receiving unit 312 is arranged at the upper left part of the mounting reference frame 1, and the second laser emitting unit 321 of the second detection component 320 is arranged at the upper right part of the mounting reference frame 1, and the second laser receiving unit 322 is arranged at the lower left part of the mounting reference frame 1. Furthermore, in more other embodiments, the first laser emitting unit 311 of the first detection component 310 can be set at the lower left part of the mounting reference frame 1, the first laser receiving unit 312 can be set at the upper right part of the mounting reference frame 1, and the second laser emitting unit 321 of the second detection component 320 can be set at the lower right part of the mounting reference frame 1, and the second laser receiving unit 322 can be set at the upper left part of the mounting reference frame 1.

[0045] In addition, the first laser emitting unit 311 can be arranged at the lower part of the mounting base frame 1, the second laser emitting unit 321 can be arranged at the upper part of the mounting base frame 1, and the laser receiving unit can be arranged correspondingly, and the direction of the laser beam can be unified. In general, laser beams inclined relative to the sound inlet direction of the sound inlet channel 2 in multiple directions are mainly formed, and more are not further listed here, and those skilled in the art can understand and implement them according to the above description.

[0046] In this embodiment, if Figure 4 As shown in Figure 4This is a schematic diagram of the top structure of an acoustic wave detection device provided in this embodiment, in which at least two of the first laser emitting units 311 in several groups of the first detection components 310 emit lasers to the first laser receiving unit 312 in parallel with each other; in at least two of the second laser emitting units 321 in several groups of the second detection components 320 emit lasers to the second laser receiving unit 322 in parallel with each other.

[0047] Specifically, in this embodiment, Figure 4 As shown in the figure, the lasers emitted by the first laser emitting units 311 of three groups of first detection components 310 are parallel to each other (horizontally). Similarly, the lasers emitted by the second laser emitting units 321 of three groups of second detection components 320 are parallel to each other (longitudinal). At least two groups of first detection components 310 or second detection components 320 that are parallel to each other can further simplify the measurement structure of the device, reasonably reduce the complexity and diversity of detection data, reduce the requirements for the calculation of the wave direction, and mutually verify and improve the calculation speed of the device for the measurement results, which is conducive to improving the measurement accuracy of the device. More specifically, in this embodiment, Figure 4 As shown in the figure, by designing three sets of mutually parallel first detection components 310 and three sets of mutually parallel second detection components 320, a 3-horizontal and 3-vertical inclined laser layout pattern is formed to achieve high-sensitivity sensing of full-size acoustic signals within the measurement angle range. When used, combined with Figure 3 As shown, the left side tilted wave signal mainly acts on the right side laser beam, and the right side tilted wave signal mainly acts on the left side laser beam, realizing high sensitivity sensing of the left and right wave signals. In addition, when necessary, the number of layers of 3 horizontal and 3 vertical crossed tilted lasers can be increased, such as 3 horizontal and 3 vertical 2-layer crossed tilted lasers. More other forms are not further listed and described here.

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

[0049] It is understandable that, in the foregoing, the first detection assembly 3 and the second detection assembly 320 are arranged relative to each other or at least two groups of the first detection assembly 310 or at least two groups of the second detection assembly 320 are arranged in parallel with each other, etc., all have their own advantages, but do not exclude other possible arrangements of the detection assembly 3. For example, in other embodiments, several groups of the first detection assembly 310 and several groups of the second detection assembly 320 are evenly spaced and distributed in the circumference of the sound inlet channel 2. Specifically, several groups of the first detection assembly 310 and several groups of the second detection assembly 320 can be evenly spaced and distributed in the circumference of the sound inlet channel 2, or several groups of the first detection assembly 310 and several groups of the second detection assembly 320 can be evenly spaced and distributed in sequence or not. It should be noted that the difference between the evenly spaced distribution and the parallelism described and illustrated above is that laser routes of different angles can be formed in sequence and evenly spaced in the circumference of the sound inlet channel 2, so that the detection effect can be guaranteed in all directions and more angles.

[0050] In this embodiment, an optical path range extension module 4 is also included. One end of the optical path range extension module 4 is used to receive the laser emitted by the laser emitting unit 31, and the other end is connected to the laser receiving unit 32 to extend the laser range and enter the laser receiving unit 32.

[0051] It is understood that optical path extension refers to increasing the length of the optical path in an optical system to improve optical performance or meet specific application requirements. This can be achieved in many ways, such as using reflectors, lenses or other optical elements to extend the optical path. Figure 5 As shown, it is a structural schematic diagram of the optical path range extension module provided in this embodiment. In this embodiment, the optical path range extension module 4 is arranged on the mounting reference frame 1. The optical path range extension module 4 is mainly composed of two reflectors 42 arranged relatively on the module body 41. The design interval between the incident light and the outgoing light is 60mm, the interval between the two reflectors 42 is 50mm, and there are 30 reflections in total. The total optical path is 1550mm, the spacing between the single-sided reflection spots is 4mm, the spot size is 1mm, and there is a 3mm empty area between the two adjacent spots. Considering the uneven coating within 0.5mm of the edge of the reflector, that is, the final outgoing light offset does not exceed 1.25mm, it can be ensured that the outgoing light is not blocked. By designing the optical path range extension module 4, the sensitivity of the acoustic and optical sensor detection can be improved. For example, in this embodiment, a 1550mm optical path range extension is achieved in a 60mm×50mm×12mm space, and the sensitivity of the acoustic and optical sensor detection is improved by about 18dB. It is understandable that the incident light end of the optical path range extending module 4 in this embodiment can be directly aligned with the laser emitting unit 31 so as to receive the laser for range extension and then emit it to the laser receiving unit 32 for processing.

[0052] In this embodiment, if Figure 1 As shown in , it also includes a laser generating component 5, which is arranged on the mounting reference frame 1 and is simultaneously connected to the laser emitting units 31 of multiple groups of the detection components 3.

[0053] It is understandable that the laser generating component 5 can be a conventional laser or a laser generator, and can be specifically selected from the prior art according to actual needs. It is not strictly limited here. The main point is that in this embodiment, after the laser generating component 5 generates a laser, it is synchronously emitted to multiple first laser emitting units 311 for emission, which can ensure the uniformity of the laser beam and save space and equipment costs. It is understandable that the number of laser generating components 5 can be set according to actual needs. For example, the corresponding laser generating components 5 can be allocated according to the number of different detection components 3. In this embodiment, Figure 1 As shown, two laser generating components 5 are provided, 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 uniformly generated by one laser generating component 5, and the laser of the second detection component 320 is uniformly generated by another laser generating component 5. More specific situations can be simply adjusted according to actual needs and will not be further described here.

[0054] In one possible embodiment, Figure 6 As shown, it is a schematic diagram of the overall structure of another acoustic wave detection device provided in an embodiment of the present application. The acoustic wave detection device also includes a cable 6 and an electronic warehouse 7. One end of the cable 6 is connected to the detection component 3, and the other end is connected to the electronic warehouse 7.

[0055] It can be understood that in this embodiment, through the setting of the cable 6 and the electronic warehouse 7, other electronic equipment, such as a control unit, a power supply, etc., can be set in the electronic warehouse 7, so as to avoid the electronic equipment in the electronic warehouse 7 from affecting the detection effect of the detection component 3. At the same time, it can also make rational use of the space and avoid space congestion in the detection sensing area. In addition, a wireless transmission function can be set in the electronic warehouse 7 according to actual needs, so as to realize the wireless detection and real-time feedback of the sound wave detection device in this embodiment. More specific settings will not be further described here.

[0056] In this embodiment, if Figure 6 As shown, it also includes a shell 8, which is covered on the outside of the mounting base frame 1, and a sound-transmitting plate 9 is arranged on the shell 8 corresponding to the position of the sound inlet channel 2.

[0057] It is understandable that the housing 8 in this embodiment can be integrally sealed and arranged outside the mounting base frame 1, so as to seal and protect the mounting base frame 1 and the detection assembly 3 on the mounting base frame 1, and isolate the acoustic and optical sensing area from the external environment. In addition, by arranging the sound-permeable plate 9, the sound waves can enter from the sound-permeable plate 9, so that the sound signal enters the acoustic and optical sensing area while the water flow, silt impurities, etc. are isolated outside, thereby avoiding the influence on the laser and improving the beam sensitivity of the overall acoustic wave detection device and the stability of the system. At the same time, combined with Figure 1 As shown in the figure, the shell 8 can also include a bottom plate portion of the mounting reference frame 1 and a portion arranged on the inner wall of the sound inlet channel 2. The shell 8 as a whole is equivalent to including the mounting reference frame 1 and the detection component 3, and separating the sound inlet channel 2 area. The sound inlet channel 2 is formed by the combination of the middle portion of the shell 8 and the sound-transparent plate 9. For the middle portion of the shell 8, a glass window can be selected to be set to enable the laser rays of the laser emitting unit and the laser receiving unit to be injected and emitted. The specific understanding and implementation can be combined with the above description.

[0058] When the acoustic wave detection device provided in this embodiment is used, the underwater environment is used as an example. The underwater environment is complex, especially in the marine environment, and the acoustic signal is chaotic and unknown. If it is a laser that is parallel to the sound inlet channel 2 or perpendicular to the sound inlet channel 2, it cannot accurately align with the incoming wave direction, and the laser of the parallel or vertical beam has low acoustic and optical sensing sensitivity when the wave is coming from the side. The acoustic wave detection device of this embodiment realizes the sensing of the acoustic signal in multiple angles by deploying multiple groups of detection components 3 that form an angle (equivalent to tilt) relative to the sound inlet direction. When used specifically, taking one of the detection components 3 as an example, the laser generating component 5 emits a laser beam through the laser emitting unit 31 and then emits it to the sound inlet channel 2. In the sound inlet channel 2, the laser interacts with the acoustic signal and deflects. The laser carries the acoustic signal information at this time. The laser carrying the acoustic signal information propagates to the optical path range extension 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, so that the laser sensing acoustic signal is realized, and the acoustic signal is converted into an electrical signal output to realize acoustic wave detection.

[0059] An acoustic wave detection device provided in an embodiment of the present application has the outstanding advantage that: by arranging multiple groups of detection components 3 in the circumferential direction of the sound inlet channel 2, and the laser emitting unit 31 and the laser receiving unit 32 of each group of detection components 3 are respectively arranged on the opposite sides of the sound inlet channel 2 and staggered along the sound input 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 angle with the sound input direction of the sound inlet channel 2, and the lasers emitted by the multiple groups of detection components 3 are emitted and sensed at various angles in the sound inlet channel 2, thereby realizing the sensing of acoustic wave signals in multiple angles and directions, enriching the angle measurement of acoustic wave detection, fully detecting the direction of the acoustic wave, and improving the sensitivity and resolution of acoustic wave detection.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An acoustic wave detection device, characterized in that: include: An installation reference frame, wherein a sound inlet channel is provided through the middle of the installation reference frame; A plurality of groups of detection components are arranged on the mounting reference frame and distributed along the circumference of the sound inlet channel, each group of the detection components comprises a laser emitting unit and a laser receiving unit, the laser emitting unit and the laser receiving unit are respectively arranged on two 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 to 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.

2. The acoustic wave detection device according to claim 1, characterized in that: The direction of the laser emitted by the laser emitting unit to the corresponding laser receiving unit includes the same direction as the sound input direction of the sound input channel and the opposite direction to the sound input direction of the sound input channel.

3. The acoustic wave detection device according to claim 2, characterized in that: The plurality of groups of detection components are divided into a plurality of first detection components and a plurality of second detection components, and the plurality of first detection components and the plurality of second detection components are respectively distributed along the circumference of the sound inlet channel; the first detection component comprises a first laser emitting unit and a first laser receiving unit, and the first laser emitting unit is arranged at the upper part of the mounting reference frame, and the first laser receiving unit is arranged at the lower part of the mounting reference frame; the second detection component comprises a second laser emitting unit and a second laser receiving unit, and the second laser emitting unit is arranged at the lower part of the mounting reference frame, and the second laser receiving unit is arranged at the upper part of the mounting reference frame.

4. The acoustic wave detection device according to claim 3, characterized in that: The lasers emitted by the first laser emitting units of at least two groups among the several groups of the first detection components to the first laser receiving unit are parallel to each other; the lasers emitted by the second laser emitting units of at least two groups among the several groups of the second detection components to the second laser receiving unit are parallel to each other.

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

6. The acoustic wave detection device according to claim 3, characterized in that: A plurality of groups of the first detection components and a plurality of groups of the second detection components are evenly spaced and distributed in a circumferential direction of the sound inlet channel.

7. The acoustic wave detection device according to claim 1, characterized in that: It also includes an optical path range extension module, one end of which is used to receive the laser emitted by the laser emitting unit, and the other end is connected to the laser receiving unit to extend the range of the laser and allow the laser to enter the laser receiving unit.

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

9. The acoustic wave detection device according to claim 1, characterized in that: It also includes a cable and an electronic warehouse, one end of the cable is connected to the detection component, and the other end is connected to the electronic warehouse.

10. The acoustic wave detection device according to claim 1, characterized in that: It also includes a shell, the shell cover is arranged on the outside of the mounting reference frame, and a sound-permeable plate is arranged on the shell corresponding to the position of the sound inlet channel.

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