A mountable microphone array device

Abstract

The application discloses a kind of hanging microphone array device, it is related to acoustic device technical field, including by upper shell, lower shell and extension arm mounting base sequentially connected from top to bottom, battery, attitude sensor and multichannel signal acquisition board are equipped in upper shell, a plurality of extension arms are connected with the circumference of upper shell in circumferential direction, the upper end of each extension arm is connected with upper shell by angle adjusting device, the angle of extension arm opening outward can be adjusted and locked by angle adjusting device, a plurality of acoustic sensors are separately arranged in each extension arm along its length direction, radio communication module is equipped in lower shell, radio communication module antenna is arranged in the bottom of lower shell, battery is used to power supply entire device, multichannel signal acquisition board is electrically connected with acoustic sensor, multichannel signal acquisition board and attitude sensor are electrically connected with radio communication module respectively.The application has good signal acquisition, and the position and intensity information of sound source under different frequencies can be accurately positioned.

Description

Technical Field

[0001] This invention relates to the field of acoustic device technology, and in particular to a device for mounting a microphone array. Background Technology

[0002] Existing acoustic acquisition devices have fixed acquisition components, which cannot be adapted to different application scenarios, resulting in poor signal acquisition. Furthermore, most existing acoustic acquisition devices are attached to drones, and the detected signals contain a large amount of drone noise, making it impossible to accurately locate the sound source position and intensity information at different frequencies. Summary of the Invention

[0003] The purpose of this invention is to provide a microphone array mounting device to solve the problems existing in the prior art, which has good signal acquisition performance and can accurately locate the sound source position and intensity information at different frequencies.

[0004] To achieve the above objectives, the present invention provides the following solution:

[0005] This invention provides a microphone array mounting device, comprising an upper shell, a lower shell, and an extension arm mounting base connected sequentially from top to bottom. The upper shell houses a battery, an attitude sensor, and a multi-channel signal acquisition board. Multiple extension arms are circumferentially connected to the outer periphery of the upper shell. The upper end of each extension arm is connected to the upper shell via an angle adjustment device, which can adjust and lock the outward opening angle of the extension arm. Multiple acoustic sensors are spaced apart along the length of each extension arm. A radio communication module is housed within the lower shell, and an antenna for the radio communication module is located at the bottom of the lower shell. The battery powers the entire device. The multi-channel signal acquisition board is electrically connected to the acoustic sensors. The multi-channel signal acquisition board and the attitude sensor are electrically connected to the radio communication module, respectively.

[0006] Preferably, the extension arm mounting base includes a base support tube and a base support frame. The upper end of the base support tube is fixed to the lower end of the lower housing. The lower end of the base support tube is provided with a plurality of base support frames corresponding to each of the extension arms. Each base support frame is provided with an arc-shaped groove on its outer side for accommodating the extension arm. The bottom of each arc-shaped groove is provided with a magnet for magnetically attracting the extension arm.

[0007] Preferably, the radio communication module antenna is fixed to the base support tube by an antenna clamp.

[0008] Preferably, the angle adjustment device includes a locking base, a locking lever, and a torsion spring. One end of the locking base has a plurality of continuously distributed slots. The end of the locking base with the slots is rotatably connected to the extension arm, and the other end is fixed to the upper housing. One end of the locking lever has a latching protrusion, and the other end is a toggle end. The locking lever is rotatably connected to the extension arm via a pin. The pin is positioned between the latching protrusion and the toggle end. The torsion spring is sleeved on the pin and provides elastic force to engage the latching protrusion with the slot. When the toggle end is moved to disengage the latching protrusion from the slot, the extension arm can rotate freely to adjust its opening angle. When the latching protrusion engages in different slots, the extension arm with different opening angles can be locked to the upper housing.

[0009] Preferably, the extension arm includes an extension arm base, an extension arm tube, and an extension arm end cap. The extension arm base is connected to the upper end of the extension arm tube, and the extension arm end cap is connected to the lower end of the extension arm tube. Each acoustic sensor is fixedly connected inside the extension arm tube through an acoustic sensor mounting base. The locking base has one end with the slot rotatably connected to the extension arm base, and the locking lever is rotatably connected to the extension arm base through the pin.

[0010] Preferably, the extension arm tube is covered with a sound-absorbing sponge layer, and the lower end of the extension arm end cap is provided with a rubber foot pad.

[0011] Preferably, the bottom of the lower housing is provided with a power charging interface and a power switch. The power charging interface is used to charge the battery. The upper housing is also provided with a power management board, which is used to manage the charging and discharging process of the battery to ensure reliable operation of the charging and discharging process.

[0012] Preferably, the upper housing is provided with a power indicator light to indicate the battery power.

[0013] Preferably, a lifting ring is fixedly provided at the upper end of the upper outer shell.

[0014] The present invention achieves the following technical effects compared to the prior art:

[0015] This invention provides a microphone array mounting device that can be attached to a drone using ropes and suspended in the air. Utilizing the inverse square law of sound propagation, the longer the rope, the weaker the influence of drone noise on the acquired signal, thus greatly reducing the impact of drone noise and improving detection accuracy. By setting up multiple extension arms and placing multiple acoustic sensors in each extension arm, the deployment angle of the extension arms can be flexibly adjusted in different application scenarios, and the positions of the acoustic sensors within the extension arms can be flexibly arranged. With the help of multiple acoustic sensors forming an acoustic array, and in conjunction with an attitude sensor, this device has excellent signal acquisition capabilities and can accurately locate the position and intensity information of sound sources at different frequencies. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention in its folded state;

[0018] Figure 2 This is a front view of the overall structure of the present invention in its folded state;

[0019] Figure 3 This is a top view of the overall structure of the present invention in its folded state;

[0020] Figure 4 This is a schematic diagram of the overall structure of the present invention in an extended state;

[0021] Figure 5 This is a front view of the overall structure of the present invention in its extended state;

[0022] Figure 6 This is a top view of the overall structure of the present invention in an extended state;

[0023] Figure 7 This is a cross-sectional view of the connection structure between the extension arm and the angle adjustment device of the present invention;

[0024] Figure 8 for Figure 7 A magnified structural diagram of part A in the middle.

[0025] In the diagram: 1-Upper shell, 2-Lower shell, 3-Extension arm mounting base, 4-Extension arm, 5-Acoustic sensor, 6-Radio communication module antenna, 7-Base support tube, 8-Base support frame, 9-Arc groove, 10-Magnet, 11-Antenna clamp, 12-Locking base, 13-Locking lever, 14-Torsion spring, 15-Slot, 16-Protrusion, 17-Actuating end, 18-Pin, 19-Extension arm base, 20-Extension arm tube, 21-Extension arm end cap, 22-Acoustic sensor mounting base, 23-Sound-absorbing sponge layer, 24-Rubber foot pad, 25-Power charging interface, 26-Power switch, 27-Power indicator light, 28-Lifting ring, 29-Extension arm mounting base. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] The purpose of this invention is to provide a microphone array mounting device to solve the problems existing in the prior art. It has good signal acquisition capabilities and can accurately locate the position and intensity information of the sound source at different frequencies.

[0028] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] like Figures 1-8 As shown, this embodiment provides a microphone array mounting device, including an upper shell 1, a lower shell 2, and an extension arm mounting base 3 connected sequentially from top to bottom. The upper shell 1 houses a battery, an attitude sensor, and a multi-channel signal acquisition board. Multiple extension arms 4 are circumferentially connected to the outer periphery of the upper shell 1. The upper end of each extension arm 4 is connected to the upper shell 1 through an angle adjustment device. The angle adjustment device can adjust and lock the outward opening angle of the extension arm 4. Multiple acoustic sensors 5 are spaced apart along the length of each extension arm 4. The lower shell 2 houses a radio communication module, and the bottom of the lower shell 2 has a radio communication module antenna 6. The battery powers the entire device. The multi-channel signal acquisition board is electrically connected to the acoustic sensors 5. The multi-channel signal acquisition board and the attitude sensor are electrically connected to the radio communication module.

[0030] In use, this device can be attached to a drone using ropes and suspended in the air. Utilizing the inverse square law of sound propagation, the longer the rope, the weaker the influence of drone noise on the acquired signal, significantly reducing the impact of drone noise and improving detection accuracy. The device can be manually extended or folded using its extension arms 4. By setting multiple extension arms 4 and housing multiple acoustic sensors 5 within each arm 4, the device allows for flexible adjustment of the extension arm 4's deployment angle and arrangement of the acoustic sensors 5 within each arm 4 in different application scenarios. Multiple acoustic sensors 5 form an acoustic array to achieve optimal signal acquisition. The foldable structure of the extension arms 4 allows for storage when not in use, reducing its footprint. When the device switch is pressed, the acoustic sensors 5, signal acquisition board, radio communication module, and other components power on. The acoustic sensors 5 convert acoustic signals into analog signals and transmit them via coaxial cable to the multi-channel signal acquisition board for multi-channel signal acquisition. The board communicates with the computer via a radio communication module. The radio communication module and its antenna work together to transmit the collected data to a ground-based radio receiver, which then transmits it to the ground computer. The computer program and algorithms analyze and calculate the data to determine the location and intensity of the target sound source. The attitude sensor detects the device's pitch, roll, and yaw rates in real time, as well as the XYZ three-axis accelerations (excluding gravitational acceleration), and calculates the pitch, roll, yaw, and quaternions in real time. This is used to compensate for the impact of changes in the device's orientation on positioning and identification when the device is suspended in the air, thereby accurately locating the sound source's position and intensity at different frequencies.

[0031] The upper outer casing 1 serves to prevent dust and water damage, protecting the internal electronic components. The lower outer casing 2 has perforated structures around its perimeter to facilitate ventilation and heat dissipation for the radio communication module.

[0032] In this embodiment, the extension arm mounting base 3 includes a base support tube 7 and a base support frame 8. The upper end of the base support tube 7 is fixed to the lower end of the lower outer shell 2. Multiple base support frames 8, each corresponding to one of the extension arms 4, are provided on the outer periphery of the lower end of the base support tube 7. Each base support frame 8 has an arc-shaped groove 9 on its outer side for accommodating the extension arm 4, and a magnet 10 for magnetically attracting the extension arm 4 is provided at the bottom of each arc-shaped groove 9. Each base support frame 8 has a G1 / 4 threaded hole at its bottom, which can be connected to a camera tripod for easy indoor acoustic algorithm debugging.

[0033] In this embodiment, the radio communication module antenna 6 is fixed to the base support tube 7 by the antenna clamp 11.

[0034] In this embodiment, the angle adjustment device includes a locking base 12, a locking lever 13, and a torsion spring 14. One end of the locking base 12 is provided with a plurality of continuously distributed slots 15. The end of the locking base 12 with slots 15 is rotatably connected to the extension arm 4, and the other end is fixed to the upper outer shell 1. One end of the locking lever 13 is provided with a locking protrusion 16, and the other end is a toggle end 17. The locking lever 13 is rotatably connected to the extension arm 4 through a pin 18. The pin 18 is disposed between the locking protrusion 16 and the toggle end 17. The torsion spring 14 is sleeved on the pin 18. The torsion spring 14 can provide elastic force to make the locking protrusion 16 engage with the slot 15. When the toggle end 17 is toggled to make the locking protrusion 16 disengage from the slot 15, the extension arm 4 can rotate freely to adjust its opening angle. When the locking protrusion 16 engages with different slots 15, the extension arm 4 with different opening angles can be locked on the upper outer shell 1. In this embodiment, the extension arm 4 can be extended to angles of 0°, 30°, and 60° with the vertical central axis. When the locking lever 13 is pressed, the latch 16 in the locking lever 13 will pop out of the slot 15 on the locking base 12, at which point the extension arm 4 can be rotated. After rotating to the extended angle, the thumb releases the locking lever 13, and the locking lever 13 will be engaged in the slot 15 on the locking base 12 by the elastic force of the torsion spring 14, thereby fixing the locking angle. An extension arm mounting base 29 is provided between the upper outer shell 1 and the lower outer shell 2. The extension arm mounting base 29 is designed with multiple extension arm mounting slots for connecting to the locking base 12. A suitable number of extension arms 4 can be installed according to the algorithm requirements, and the extension arms 4 are evenly distributed circumferentially. In this embodiment, four extension arms 4 are installed.

[0035] In this embodiment, the extension arm 4 includes an extension arm base 19, an extension arm tube 20, and an extension arm end cap 21. The extension arm base 19 is connected to the upper end of the extension arm tube 20, and the extension arm end cap 21 is connected to the lower end of the extension arm tube 20. Each acoustic sensor 5 is fixedly connected to the extension arm tube 20 through an acoustic sensor mounting base 22. The acoustic sensor 5 is fixedly mounted through the acoustic sensor mounting base 22, which ensures the consistency of the acoustic sensor 5 layout in each extension arm 4. The locking base 12 has a slot 15 at one end that is rotatably connected to the extension arm base 19, and the locking lever 13 is rotatably connected to the extension arm base 19 through a pin 18. The entire extension arm 4 is supported by the extension arm tube 20, which improves the rigidity of the entire extension arm 4, thereby ensuring that the extension arm 4 will not bend due to insufficient rigidity when the entire device is in the extended state and placed on the ground. The extension arm end cap 21 is made of ferromagnetic material, and when the extension arm 4 is in the folded state, it will be attracted to the magnet 10 in the arc-shaped groove 9.

[0036] In this embodiment, the extension arm tube 20 is covered with a sound-absorbing sponge layer 23 to reduce the impact of wind noise and thus improve the recognition accuracy; the lower end of the extension arm end cap 21 is provided with a rubber foot pad 24 to provide support when the entire device is placed on the ground.

[0037] In this embodiment, the bottom of the lower outer casing 2 is provided with a power charging interface 25 and a power switch 26. The power charging interface 25 is used to charge the battery. The upper outer casing 1 is also provided with a power management board, which is used to manage the charging and discharging process of the battery to ensure the reliable operation of the charging and discharging process and to prevent the battery from being overcharged or over-discharged.

[0038] In this embodiment, the upper outer casing 1 is provided with a power indicator light 27 to indicate the battery power. It includes four green lights and one red light. When all four green lights and one red light are lit, it indicates that the battery power is 80%-100%. When three green lights and one red light are lit, it indicates that the battery power is 60%-80%, and so on. When only one red light is lit, it indicates that the battery power is low, less than or equal to 20%, and the device needs to be charged.

[0039] In this embodiment, a lifting ring 28 is fixedly provided at the upper end of the upper outer shell 1. This device can be suspended from a drone or other flying vehicle via a traction cable through the lifting ring 28, and then lifted into the air by the flying vehicle. Combined with attitude data collected by attitude sensors, it can locate the sound source of a ground target. This device can be widely used in post-disaster ground search and rescue operations to capture and locate ground distress signals.

[0040] The operating procedure for this device is as follows:

[0041] Press the power switch 26. The power indicator 27 illuminates, displaying the remaining battery power. At this point, all electronic components in the device, including the attitude sensor, multi-channel signal acquisition board, power management board, radio communication module, and acoustic sensor 5, begin to power on and operate. Press the locking lever 13 and move the extension arm 4 to the desired angle, then release the locking lever 13. The extension arm 4 will then extend and lock at a fixed angle. Attach one end of the traction cable to the device's hanging ring 28 and the other end to a drone or other flying vehicle. Control the flying vehicle and pull the device into the air. Once the device reaches the desired altitude for detection, start the computer's positioning calculation program. After completing the detection, remotely control the flying vehicle to return to the stopping point and remove the device. Press the locking lever 13 and move the extension arm 4 to fold it. The magnet 10 on the base support frame 8 will attract the extension arm end cap 21, completing the folding process. Pressing the power switch 26 will stop the power supply and turn off the power indicator light 27. You can decide whether to charge the device based on the remaining power. When charging is needed, insert the charger plug into the power charging port 25. After the charger indicates that the power is fully charged, unplug the charger plug to complete the charging process.

[0042] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A microphone array mounting device, characterized in that: The device comprises an upper shell, a lower shell, and an extension arm mounting base connected sequentially from top to bottom. The upper shell houses a battery, an attitude sensor, and a multi-channel signal acquisition board. Multiple extension arms are circumferentially connected to the outer periphery of the upper shell. The upper end of each extension arm is connected to the upper shell via an angle adjustment device, which can adjust and lock the outward opening angle of the extension arm. Multiple acoustic sensors are spaced apart along the length of each extension arm. The lower shell houses a radio communication module, and its bottom has an antenna. The battery powers the entire device. The multi-channel signal acquisition board is electrically connected to the acoustic sensors. The multi-channel signal acquisition board and the attitude sensor are both electrically connected to the radio communication module. The extension arm mounting base includes a base support tube and a base support frame. The upper end of the base support tube is fixed to the lower end of the lower outer shell. The lower end of the base support tube is provided with a plurality of base support frames corresponding to each of the extension arms. Each base support frame is provided with an arc-shaped groove on its outer side for accommodating the extension arm. The bottom of each arc-shaped groove is provided with a magnet for magnetically attracting the extension arm.

2. The microphone array mounting device according to claim 1, characterized in that: The radio communication module antenna is fixed to the base support tube by an antenna clamp.

3. The microphone array mounting device according to claim 1, characterized in that: The angle adjustment device includes a locking base, a locking lever, and a torsion spring. One end of the locking base has multiple continuously distributed slots. The end of the locking base with the slots is rotatably connected to the extension arm, and the other end is fixed to the upper housing. One end of the locking lever has a locking protrusion, and the other end is a toggle end. The locking lever is rotatably connected to the extension arm via a pin, which is positioned between the locking protrusion and the toggle end. The torsion spring is sleeved on the pin and provides elastic force to engage the locking protrusion with the slot. When the toggle end is moved to disengage the locking protrusion from the slot, the extension arm can rotate freely to adjust its opening angle. When the locking protrusion engages with different slots, the extension arm with different opening angles can be locked to the upper housing.

4. The microphone array mounting device according to claim 3, characterized in that: The extension arm includes an extension arm base, an extension arm tube, and an extension arm end cap. The extension arm base is connected to the upper end of the extension arm tube, and the extension arm end cap is connected to the lower end of the extension arm tube. Each acoustic sensor is fixedly connected inside the extension arm tube through an acoustic sensor mounting base. The locking base has a slot at one end that is rotatably connected to the extension arm base, and the locking lever is rotatably connected to the extension arm base through a pin.

5. The microphone array mounting device according to claim 4, characterized in that: The extension arm tube is covered with a sound-absorbing sponge layer, and the lower end of the extension arm end cap is provided with a rubber foot pad.

6. The microphone array mounting device according to claim 1, characterized in that: The bottom of the lower housing is provided with a power charging interface and a power switch. The power charging interface is used to charge the battery. The upper housing is also provided with a power management board, which is used to manage the charging and discharging process of the battery to ensure reliable operation of the charging and discharging process.

7. The microphone array mounting device according to claim 1, characterized in that: The upper casing is equipped with a power indicator light to indicate the battery's power level.

8. The microphone array mounting device according to claim 1, characterized in that: A lifting ring is fixedly provided at the upper end of the upper outer shell.

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