Rotatable parabolic reflection microphone

Abstract

The utility model discloses a rotatable paraboloid reflection type microphone, which comprises a guide rail plate, a motor cover, a reflecting surface, a support rod and a microphone, one side of the guide rail plate is provided with an ear frame through a guide clamping plate, the ear frame is hinged with a hinge ear at the back side of the support rod, the top of the support rod is provided with a rotating arm controlled by a first motor, and the rotating arm is connected with the motor cover. A microphone is arranged at the end of the rotating arm, a reflecting face is arranged on the outer side of the microphone, and the bottom end of the guide rail plate is connected with a mounting sleeve at the top of the supporting base. According to the utility model, the rotating arm controlled by the first motor is arranged, the end part of the rotating arm is connected with the microphone, and the reflecting surface is arranged on the outer side of the microphone, so that the microphone and the reflecting surface can be controlled to rotate through the design, and the microphone can be accurately placed in a plurality of different target spatial orientations and can be measured in sequence; therefore, the method is equivalent to simultaneous measurement by using a large number of array elements in the microphone array.

Description

TECHNICAL FIELD

[0001] The utility model relates to a microphone related field, concretely is a rotatable parabolic reflector microphone. BACKGROUND

[0002] In the measurement of spatial acoustic characteristics, the spatial sound signals recorded by the spherical microphone array are often used. The existing device combines several microphones into an array according to a specific geometric configuration and places them on the same spatial structure. The most common structure is to uniformly arrange dozens of omnidirectional microphones on the surface of a hard spherical barrier.

[0003] The number of microphones in the array at the current stage is often dozens, which is relatively large. This results in a very high cost of the existing device, and the difficulty of manufacturing, assembly and fault repair is also relatively large. High-order coding and decoding technology is required to record the spatial sound field. This technology has high requirements for the number and distribution pattern of spatial sampling points. Otherwise, it will not be able to accurately record sound signals with high spatial resolution. It is not flexible enough to use, cannot be adjusted in height, and has a small receiving range. SUMMARY

[0004] The utility model aims at providing a rotatable parabolic reflector microphone to solve the problem that the number of microphones in the array is often dozens, which is relatively large, resulting in a very high cost of the existing device, and the difficulty of manufacturing, assembly and fault repair is also relatively large. High-order coding and decoding technology is required to record the spatial sound field. This technology has high requirements for the number and distribution pattern of spatial sampling points. Otherwise, it will not be able to accurately record sound signals with high spatial resolution. It is not flexible enough to use, cannot be adjusted in height, and has a small receiving range.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a rotatable parabolic reflector microphone, comprising a guide rail plate, a motor cover, a reflecting surface, a support rod and a microphone, one side of the guide rail plate is provided with an ear hook through a guide clamping plate, and the ear hook is hinged to the hinge ear on the back side of the support rod, the top of the support rod is provided with a rotating arm controlled by a first motor, the end of the rotating arm is provided with a microphone, the outside of the microphone is provided with a reflecting surface, and the bottom end of the guide rail plate is connected with the mounting sleeve on the top of the support base.

[0006] In further embodiments, the guide rail plate comprises a guide groove, a screw rod, a gear box and a second motor;

[0007] The guide groove is arranged in the middle of the front surface of the guide rail plate, the screw rod is arranged in the middle of the guide groove, and the screw rod is in transmission connection with the guide ear wire rod on the inside of the guide clamping plate, the gear box is arranged at the lower position on the back surface of the guide rail plate, and the second motor is arranged on the top of the gear box.

[0008] In a further embodiment, a driving gear is provided inside the gear box, and the driving gear is provided on the output shaft of the second motor, and a driven gear is provided at the end of the screw, and the driving gear is gear-connected to the driven gear.

[0009] In a further embodiment, a control panel is further included, wherein a connecting rod is provided on one side of the control panel, and the connecting rod is inserted and fixed to the upper position of the back side of the guide rail plate.

[0010] In a further embodiment, an electric push rod is further included, which is arranged at the hinge between the ear frame and the hinged ear, the cylinder end of the electric push rod is hinged to the top of the ear frame, and the telescopic end of the electric push rod is hinged to the connecting ear on one side of the support rod.

[0011] In a further embodiment, the first motor is arranged inside the motor cover, the end of the rotating arm is rotatably connected to the bearing on the top of the motor cover, and the output shaft of the first motor is connected to the end of the rotating arm.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. This utility model is provided with a rotating arm controlled by a first motor, and the end of the rotating arm is connected to the microphone. A reflective surface is provided on the outside of the microphone. This design can control the rotation of the microphone and the reflective surface, accurately placing the microphone at multiple different target spatial orientations and completing measurements sequentially, which is equivalent to using a large number of array elements in a microphone array to perform measurements simultaneously.

[0014] 2. When performing acoustic measurements at specific angles, the system structure shown in this solution can utilize mechanical rotation to replace microphone array beamforming, accurately capturing sounds from a specific direction while isolating sounds from other directions, thereby reducing the complexity of subsequent signal processing.

[0015] 3. The utility model is provided with a guide plate, and the guide plate is connected to the ear frame through a guide card plate, and the ear frame is connected to the support rod by a hinge. By raising and lowering the guide card plate on the guide plate, the support rod can be adjusted in height, thereby adjusting the height of the microphone. In addition, an electric push rod is provided at the hinge to adjust the angle of the support rod, and the spatial orientation of the microphone can be freely controlled. It has strong adjustability and can specifically improve the sampling density of the target spatial area during measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a rotatable parabolic reflection microphone of the present utility model;

[0017] Figure 2 This is a schematic structural diagram of the support rod of the utility model;

[0018] Figure 3 This is the front view of the guide rail plate of the utility model;

[0019] Figure 4 This is a schematic structural diagram of the rotating arm of the utility model;

[0020] Figure 5 This is the front view of the reflective surface of the utility model;

[0021] Figure 6 This is a structural diagram of part A of the utility model.

[0022] In the figure: 1. control panel; 2. connecting rod; 3. guide plate; 4. support base; 5. mounting sleeve; 6. motor cover; 7. reflecting surface; 8. support rod; 9. microphone; 10. rotating arm; 11. electric push rod; 12. guide plate; 13. ear bracket; 14. hinge ear; 15. first motor; 16. screw; 17. guide groove; 18. second motor; 19. driving gear; 20. gear box; 21. driven gear. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] See also Figures 1-6 The utility model provides an embodiment: a rotatable parabolic reflection microphone, including a guide plate 3, a motor cover 6, a reflecting surface 7, a support rod 8 and a microphone 9, one side of the guide plate 3 is provided with an ear frame 13 through a guide card 12, and the ear frame 13 is hinged to the hinge ear 14 on the back side of the support rod 8, the top of the support rod 8 is provided with a rotating arm 10 controlled by a first motor 15, the end of the rotating arm 10 is provided with a microphone 9, the outer side of the microphone 9 is provided with a reflecting surface 7, and the bottom end of the guide plate 3 is connected to the mounting sleeve 5 on the top of the support base 4.

[0025] By raising and lowering the guide card 12 on the guide rail plate 3, the support rod 8 can be driven to be adjusted in height. By hinged connection between the ear frame 13 and the hinged ear 14, the angle of the support rod 8 can be adjusted. The first motor 15 can drive the rotating arm 10 to rotate, so that the rotating arm 10 drives the microphone 9 and the reflecting surface 7 to turn. The support base 4 is used to stably support and place the guide rail plate 3.

[0026] Furthermore, the guide rail plate 3 includes a guide groove 17, a screw 16, a gear box 20 and a second motor 18;

[0027] The guide groove 17 is provided in the middle of the front side of the guide rail plate 3, the screw 16 is provided in the middle of the guide groove 17, and the screw 16 is connected to the guide ear screw on the inner side of the guide card 12, the gear box 20 is provided at the lower position of the back side of the guide rail plate 3, and the second motor 18 is provided at the top of the gear box 20. Through the guide ear on the inner side of the guide card 12 and the screw 16, it can automatically control the lifting and lowering of the guide card 12, and the screw 16 can be driven to rotate by the gear box 20 through the second motor 18.

[0028] Furthermore, a driving gear 19 is provided inside the gear box 20 , and the driving gear 19 is provided on the output shaft of the second motor 18 . A driven gear 21 is provided at the end of the screw 16 , and the driving gear 19 and the driven gear 21 are connected by gear transmission.

[0029] Furthermore, it also includes a control panel 1, a connecting rod 2 is provided on one side of the control panel 1, and the connecting rod 2 is inserted into the upper position of the back side of the guide plate 3, and the control panel 1 is used to control the electric push rod 11, the first motor 15 and the second motor 18.

[0030] Furthermore, it also includes an electric push rod 11, which is arranged at the hinge between the ear frame 13 and the hinged ear 14. The cylinder end of the electric push rod 11 is hinged to the top of the ear frame 13, and the telescopic end of the electric push rod 11 is hinged to the connecting ear on one side of the support rod 8. The angle of the support rod 8 can be adjusted through the electric push rod 11.

[0031] Furthermore, the first motor 15 is arranged inside the motor cover 6, the end of the rotating arm 10 is rotatably connected to the bearing at the top of the motor cover 6, and the output shaft of the first motor 15 is connected to the end of the rotating arm 10, and the motor cover 6 is used to provide safety protection for the first motor 15.

[0032] Working principle: When in use, the second motor 18 and the first motor 15 are intelligently controlled through the control panel 1, and the first motor 15 drives the rotating arm 10 to rotate, and the rotating arm 10 drives the reflecting surface 7 and the microphone 9 to rotate, so that the microphone 9 is placed in multiple different target space orientations and the measurement is completed successively, which is equivalent to using a large number of array elements in the microphone 9 array to measure simultaneously, and the measurement data is displayed on the control panel 1 in a timely manner. The angle of the support rod 8 can be adjusted by the electric push rod 11, and the angle of the microphone 9 and the reflecting surface 7 is adjusted by the support rod 8. The second motor 18 drives the driving gear 19 to rotate, so that the driving gear 19 and the driven gear 21 are gear-driven and controlled, so that it drives the screw 16 to rotate, so that the screw 16 and the inner guide ear screw of the guide card 12 are transmitted, so that the guide card 12 drives the support rod 8 to be adjusted in height, and the support rod 8 carries the microphone 9 and the reflecting surface 7 for lifting and lowering control.

[0033] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A rotatable parabolic reflection microphone, comprising a guide plate (3), a motor cover (6), a reflecting surface (7), a support rod (8) and a microphone (9), characterized in that: One side of the guide rail plate (3) is provided with an ear frame (13) through a guide card plate (12), and the ear frame (13) is hinged to a hinge ear (14) on the back side of the support rod (8). The top of the support rod (8) is provided with a rotating arm (10) controlled by a first motor (15), and the end of the rotating arm (10) is provided with a microphone (9). The outer side of the microphone (9) is provided with a reflecting surface (7). The bottom end of the guide rail plate (3) is connected to the mounting sleeve (5) on the top of the support base (4).

2. The rotatable parabolic reflection microphone according to claim 1, characterized in that: The guide rail plate (3) comprises a guide groove (17), a screw (16), a gear box (20) and a second motor (18); The guide groove (17) is arranged in the middle of the front side of the guide rail plate (3), the screw rod (16) is arranged in the middle of the guide groove (17), and the screw rod (16) is transmission-connected to the guide ear screw rod on the inner side of the guide card plate (12), the gear box (20) is arranged at a lower position on the back side of the guide rail plate (3), and the second motor (18) is arranged on the top of the gear box (20).

3. The rotatable parabolic reflection microphone according to claim 2, characterized in that: A driving gear (19) is provided inside the gear box (20), and the driving gear (19) is provided on the output shaft of the second motor (18). A driven gear (21) is provided at the end of the screw rod (16), and the driving gear (19) and the driven gear (21) are connected by gear transmission.

4. The rotatable parabolic reflection microphone according to claim 1, characterized in that: It also includes a control panel (1), wherein a connecting rod (2) is provided on one side of the control panel (1), and the connecting rod (2) is inserted and fixed to the upper position of the back side of the guide rail plate (3).

5. The rotatable parabolic reflection microphone according to claim 1, characterized in that: It also includes an electric push rod (11), which is arranged at the hinge between the ear frame (13) and the hinge ear (14), the cylinder end of the electric push rod (11) is hinged to the top of the ear frame (13), and the telescopic end of the electric push rod (11) is hinged to the connecting ear on one side of the support rod (8).

6. The rotatable parabolic reflection microphone according to claim 1, characterized in that: The first motor (15) is arranged inside the motor cover (6), the end of the rotating arm (10) is rotatably connected to the bearing at the top of the motor cover (6), and the output shaft of the first motor (15) is connected to the end of the rotating arm (10).

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