Linear array type ultrasonic directional sound equipment

Abstract

The utility model relates to linear array type ultrasonic directional sound equipment, which comprises a box body, a support frame, a linear array sound production module, an ultrasonic sound production module, a digital signal processor (DSP) digital audio processing module and a power supply module, and the ultrasonic sound production module comprises an ultrasonic power amplifier unit, a plurality of printed circuit boards (PCBs), a first mounting bracket and a plurality of ultrasonic directional sound production units. The plurality of ultrasonic directional sound production units are respectively mounted on the plurality of PCBs in an array manner, the plurality of PCBs are mounted on the first mounting bracket in an array manner, the first mounting bracket is mounted on the support frame, the ultrasonic power amplifier unit is mounted on the inner side of the rear shell, and the ultrasonic power amplifier unit is mounted on the outer side of the rear shell. The linear array sound production module comprises a linear array power amplifier unit, a second mounting bracket and a plurality of linear array directional sound production units, the linear array power amplifier unit and the plurality of linear array directional sound production units are mounted on the second mounting bracket, and the second mounting bracket is mounted on the support frame; on the basis of ultrasonic directional acoustics, the ultrasonic module is improved in a linear array mode, and the performance of the ultrasonic directional sound box is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of directional sound transmission, and particularly relates to a linear array ultrasonic directional sound box. Background Art

[0002] At present, most public and civil places (such as schools, hospitals, squares, etc.) mostly use ordinary high - pitched speakers for broadcasting. In most cases, there is a serious problem of disturbing residents. The community has received countless relevant responses, which seriously interfere with the quality of life of the residents around the relevant places and bring trouble to many people. With the continuous development of technology, the audio system technology is also constantly progressing.

[0003] The current directional sound boxes mainly include array - type sound boxes and ultrasonic sound boxes. The ultrasonic sound boxes adopt ultrasonic directional sound - generating technology. In this process, the audio signal is modulated to the ultrasonic frequency and then demodulated by air to restore into audible sound. Since the ultrasonic frequency is relatively high, the audio signal often only retains the high - frequency part, resulting in the sound being likely to be sharp, distorted, and easy to be distorted, especially more obvious at high power; while the array - type sound boxes are composed of multiple speakers in an array. Although the linear array speaker has good directivity, there may be insufficient sound field coverage at some angles, and the diffusion is relatively wide, which easily leads to problems such as a decline in sound quality, such as distortion and increased noise.

[0004] Therefore, there is an urgent need in the market for an audio system that can simultaneously possess the characteristics of the directional propagation technology of array - type sound boxes and ultrasonic sound boxes, and can avoid the defects of both. Summary of the Utility Model

[0005] In view of this, in view of the deficiencies of the existing technology, the main purpose of the utility model is to provide a linear array ultrasonic directional sound box, which improves the ultrasonic module with a linear array on the basis of ultrasonic directional acoustics, greatly improves the performance of the ultrasonic directional sound box, has high directivity for the sound propagation range, solves the problem of disturbing residents of high - pitched speakers in public places on the one hand, and does not reduce the sound intensity within the required range on the other hand.

[0006] To achieve the above - mentioned purpose, the utility model adopts the following technical solutions:

[0007] A linear array ultrasonic directional sound device, comprising: a box body, and a support frame, a linear array sound generating module, an ultrasonic sound generating module, a DSP digital audio processing module and a power module arranged inside the box body. The box body includes a front cover plate and a rear housing. The support frame is fixed to the inner side of the rear housing. The ultrasonic sound generating module includes an ultrasonic power amplifier unit, multiple PCB boards, a first mounting bracket and multiple ultrasonic directional sound generating units. The multiple ultrasonic directional sound generating units are respectively mounted on the multiple PCB boards in an array manner. The multiple PCB boards are mounted on the first mounting bracket in an array manner. The first mounting bracket is mounted on the support frame. The ultrasonic power amplifier unit is mounted on the inner side of the rear housing. The linear array sound generating module includes a linear array power amplifier unit, a second mounting bracket and multiple linear array directional sound generating units. The linear array power amplifier unit and the multiple linear array directional sound generating units are mounted on the second mounting bracket. The second mounting bracket is mounted on the support frame. The first mounting bracket is arranged above or below the second mounting bracket.

[0008] As a preferred solution, the PCB boards arranged on the left and right sides are inclined forward on the side away from the center of the PCB board array. Each PCB board is provided with a group of ultrasonic directional sound generating units. Each group of ultrasonic directional sound generating units is arranged on the PCB board in an equidistant spaced array manner.

[0009] As a preferred solution, the first mounting bracket includes a middle bracket and two side brackets respectively arranged on both sides of the middle bracket. The side brackets extend obliquely towards the direction of the front cover plate along the sides of the middle bracket. The middle bracket is fixedly connected to the support frame. The multiple PCB boards are arranged on the side of the middle bracket and the side brackets close to the front cover plate. It also includes a resistance element. The resistance element is arranged on the side of the first mounting bracket away from the PCB board.

[0010] As a preferred solution, reinforcing ribs are provided between the middle bracket and the side brackets.

[0011] As a preferred solution, the second mounting bracket includes a connecting plate and a mounting bracket. The connecting plate is fixedly connected to the support frame. The mounting bracket is fixedly connected to the connecting plate. The linear array power amplifier unit is arranged on the connecting plate. The multiple linear array directional sound generating units are arranged in a parallel array manner on the mounting bracket.

[0012] As a preferred solution, the mounting bracket includes a bottom plate and side plates vertically arranged on the bottom plate. The opening formed by enclosing the side plates faces away from the direction of the front cover plate. The bottom plate is provided with mounting holes for mounting the linear array directional sound generating units.

[0013] As a preferred solution, sound-absorbing cotton is provided on the inner side of the bottom plate, the inner side of the side plate, and the side of the connecting plate close to the mounting bracket.

[0014] As a preferred solution, a first mounting groove is recessed at the lower end of the rear housing, and a second mounting groove is recessed at the lower rear side of the rear housing. The first mounting groove communicates with the second mounting groove.

[0015] As a preferred solution, honeycomb-shaped through holes corresponding to the ultrasonic directional sound generation unit and the linear array power amplifier unit are provided on the front cover plate, and a dust-proof net is provided on the honeycomb-shaped through holes.

[0016] As a preferred solution, a handle is provided at the upper end of the lower end of the rear housing, and a baffle is provided at the upper end of the front cover plate

[0017] Compared with the prior art, the above linear array ultrasonic directional sound has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solutions, it mainly has a linear array sound generation module, an ultrasonic sound generation module, a DSP digital audio processing module, and a power module in the box. On the basis of ultrasonic directional acoustics, the ultrasonic module is supplemented with a linear array improvement, which greatly improves the performance of the ultrasonic directional sound, has high directivity for the sound propagation range, solves the problem of disturbing residents by high-pitched speakers in public places on the one hand, and does not reduce the sound intensity within the required range on the other hand. The sound uses the characteristics of ultrasonic waves and linear array speakers, and through precise phase control and signal processing technology, realizes the directional propagation of sound and the coverage of specific areas, has the advantages of good directivity, uniform sound field, strong anti-interference ability, etc., has the characteristics of the directional propagation technology of array speakers and the directional propagation technology of ultrasonic speakers, and is suitable for various occasions that require precise control of the sound propagation direction. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0019] Figure 2 is a schematic structural diagram of another perspective of an embodiment of the present invention;

[0020] Figure 3 is an exploded structural diagram of an embodiment of the present invention;

[0021] Figure 4 is an exploded structural diagram of the ultrasonic sound generation module of an embodiment of the present invention;

[0022] Figure 5 is an exploded structural diagram of the linear array sound generation module of an embodiment of the present invention;

[0023] Figure 6 is a schematic flow diagram of an embodiment of the present invention.

[0024] Description of the reference numerals:

[0025] 100, box body; 110, support frame; 120, front cover plate; 121, honeycomb through hole; 130, rear housing; 131, first mounting groove; 132, second mounting groove; 133, handle; 140, baffle;

[0026] 200, linear array sound module; 210, linear array power amplifier unit; 220, second mounting bracket; 221, connecting plate; 222, mounting bracket; 223, bottom plate; 224, side plate; 225, mounting hole;

[0027] 300, ultrasonic sound module; 310, ultrasonic power amplifier unit; 320, PCB board; 330, first mounting bracket; 331, intermediate bracket; 332, side bracket; 333, reinforcing rib; 335, resistance element; 340, ultrasonic directional sound unit;

[0028] 400, power supply module;

[0029] 500, DSP digital audio processing module. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0032] Please refer to Figures 1 to 6, showing a linear ultrasonic directional sound system provided by an embodiment of the present invention, comprising: a box body 100, and a support frame 110, a linear array sound generation module 200, an ultrasonic sound generation module 300, a DSP digital audio processing module 500 and a power supply module 400 disposed within the box body 100. The box body 100 includes a front cover plate 120 and a rear housing 130. The support frame 110 is fixed to the inner side of the rear housing 130 and is in a "well" shape. The ultrasonic sound generation module 300 includes an ultrasonic power amplifier unit 310, multiple PCB boards 320, a first mounting bracket 330 and multiple ultrasonic directional sound generation units 340. The multiple ultrasonic directional sound generation units 340 are respectively mounted on the multiple PCB boards 320 in an array manner, the multiple PCB boards 320 are mounted on the first mounting bracket 330 in an array manner, the first mounting bracket 330 is mounted on the support frame 110, and the ultrasonic power amplifier unit 310 is mounted on the inner side of the rear housing 130. The linear array sound generation module 200 includes a linear array power amplifier unit 210, a second mounting bracket 220 and multiple linear array directional sound generation units (not shown in the figure). The linear array power amplifier unit 210 and the multiple linear array directional sound generation units are mounted on the second mounting bracket 220, and the second mounting bracket 220 is mounted on the support frame 110. The first mounting bracket 330 is disposed above or below the second mounting bracket 220.

[0033] Further, the PCB boards 320 disposed on the left and right sides are inclined forward on the side away from the center of the PCB board array. Each PCB board 320 is provided with a group of ultrasonic directional sound generation units 340, and each group of ultrasonic directional sound generation units 340 is arranged on the PCB board 320 in an equidistant interval array manner.

[0034] Furthermore, the first mounting bracket 330 includes an intermediate bracket 331 and two side brackets 332 respectively disposed on both sides of the intermediate bracket 331. The side brackets 332 extend obliquely along the sides of the intermediate bracket 331 towards the front cover 120. The intermediate bracket 331 is fixedly connected to the support frame 110. Multiple PCB boards 320 are disposed on the side of the intermediate bracket 331 and the side brackets 332 close to the front cover 120. It also includes a resistance element 335, such as a gold resistor, which functions to reduce noise and filter. The resistance element 335 is disposed on the side of the first mounting bracket 330 away from the PCB board 320. It is composed of a plurality of ultrasonic directional sound units 340 arranged according to a certain rule. By controlling the phase and amplitude of each transducer, the directional propagation of ultrasonic waves is achieved. This ultrasonic directional sound system uses a number of low-power ultrasonic directional sound units 340 arranged in an array on the PCB board to form a linear array system. The shape and number of the ultrasonic directional sound unit 340 array are not limited. To achieve the maximum power per unit area, the spacing between the ultrasonic directional sound units 340 is preferably minimized. The staggered arrangement between adjacent rows of ultrasonic directional sound units 340 can maximize the area covered by the ultrasonic directional sound units 340, improving the overall transmission power and increasing the volume of the ultrasonic sound without changing the sound quality. The ultrasonic directional sound unit 340 is a group of radiation units arranged in a straight line with a close interval and having the same amplitude and phase. Through linear transmission, the transmission distance is increased and the attenuation degree during sound transmission is reduced. It has many advantages such as accurate directional sound propagation, avoiding sound interference, saving energy, clear voice, etc. In many public places, the directional sound can achieve accurate directional sound, and the sound can accurately point to a specific area. This accurate direction not only ensures the coverage range of the sound but also effectively reduces the sound impact on... It also has the advantage of saving energy. Since it can accurately project the sound to the required area, unnecessary energy waste can be avoided. Through precise sound control, energy expenditure can be effectively reduced and energy utilization efficiency can be improved.

[0035] Furthermore, a reinforcing rib 333 is provided between the intermediate bracket 331 and the side brackets 332.

[0036] Furthermore, the second mounting bracket 220 includes a connecting plate 221 and a mounting bracket 222, the connecting plate 221 is fixedly connected to the support frame 110, the mounting bracket 222 is fixedly connected to the connecting plate 221, the linear array power amplifier unit 210 is arranged on the connecting plate 221, and a plurality of linear array directional sound units are arranged in a parallel array on the mounting bracket 222. The linear array power amplifier unit 210 is responsible for receiving audio signals, modulating the signals through digital signal processing technology, and modulating the frequencies of 125hz, 250hz, 500hz, 1khz, and 2khz, performing high-frequency filtering through the adjusted frequencies, removing high frequencies above 2khz, and facilitating the compensation of audio signals through multi-band superposition phase adjustment, achieving better sound quality, and generating driving signals that meet the requirements of the linear array.

[0037] Furthermore, the mounting bracket 222 is groove-shaped, and includes a bottom plate 223 and a side plate 224 vertically arranged on the bottom plate 223. The opening formed by the side plate 224 faces the side away from the front cover plate 120. The bottom plate 223 is provided with a mounting hole 225 for mounting the linear array directional sound unit.

[0038] Furthermore, sound-absorbing cotton is provided on the inner side of the bottom plate 223, the inner side of the side plate 224 and the side of the connecting plate 221 close to the mounting bracket 222. The sound-absorbing cotton can reduce internal reflection and resonance, improve the acoustic performance of the speaker, absorb excess sound wave energy, and make the sound emitted by the speaker purer and clearer.

[0039] Furthermore, a first mounting groove 131 is recessed at the lower end of the rear shell 130, and a second mounting groove 132 is recessed at the lower end of the rear side of the rear shell 130, and the first mounting groove 131 is connected to the second mounting groove 132; by providing the first mounting groove 131 and the second mounting groove 132, the box body 100 can be firmly fixed on a mounting rod with a corresponding structure to prevent the box body 100 from shaking left and right.

[0040] Furthermore, the front cover plate 120 is provided with honeycomb-shaped through holes 121 corresponding to the ultrasonic directional sound emitting unit 340 and the linear array power amplifier unit 210 respectively, and a dustproof net (not shown in the figure) is provided on the honeycomb-shaped through holes 121 .

[0041] Furthermore, a handle 133 is provided at the upper end of the lower end of the rear shell 130 , and a baffle 140 is provided at the upper end of the front cover 120 .

[0042] The above linear ultrasonic directional sound has obvious advantages and beneficial effects compared with the prior art. Specifically, as can be seen from the above technical solution, it mainly has a linear array sound module, an ultrasonic sound module, a DSP digital audio processing module and a power module in the box. On the basis of ultrasonic directionality, the ultrasonic module is supplemented with a linear array improvement, which greatly improves the performance of the ultrasonic directional sound, has high directivity for the sound propagation range, solves the problem of disturbing residents by high - pitched speakers in public places on the one hand, and does not reduce the sound intensity within the required range on the other hand. This sound uses the characteristics of ultrasonic waves and linear array speakers, and through precise phase control and signal processing technology, realizes the directional propagation of sound and the coverage of specific areas. It has the advantages of good directivity, uniform sound field, strong anti - interference ability, etc., and has the characteristics of the directional propagation technology of array - type speakers and the directional propagation technology of ultrasonic speakers, and is suitable for various occasions that require precise control of the sound propagation direction.

[0043] It should be noted that the present utility model is not limited to the above - mentioned embodiments. According to the creative spirit of the present utility model, those skilled in the art can also make other changes, and these changes made according to the creative spirit of the present utility model should all be included in the scope protected by the present utility model.

Claims

1. A linear ultrasonic directional sound device, characterized in that Including: A cabinet (100), and a support frame (110), a linear array sound generating module (200), an ultrasonic sound generating module (300), a DSP digital audio processing module, and a power supply module (400) disposed inside the cabinet (100). The cabinet (100) includes a front cover plate (120) and a rear housing (130). The support frame (110) is fixed to the inner side of the rear housing (130). The ultrasonic sound generating module (300) includes an ultrasonic power amplifier unit (310), multiple PCB boards (320), a first mounting bracket (330), and multiple ultrasonic directional sound generating units (340). The multiple ultrasonic directional sound generating units (340) are respectively mounted on the multiple PCB boards (320) in an array manner. The multiple PCB boards (320) are mounted on the first mounting bracket (330) in an array manner. The first mounting bracket (330) is mounted on the support frame (110). The ultrasonic power amplifier unit (310) is mounted on the inner side of the rear housing (130). The linear array sound generating module (200) includes a linear array power amplifier unit (210), a second mounting bracket (220), and multiple linear array directional sound generating units. The linear array power amplifier unit (210) and the multiple linear array directional sound generating units are mounted on the second mounting bracket (220). The second mounting bracket (220) is mounted on the support frame (110). The first mounting bracket (330) is disposed above or below the second mounting bracket (220).

2. The linear ultrasonic directional sound device according to claim 1, wherein, The PCB boards (320) disposed on both sides are inclined forward on the side away from the center of the PCB board (320) array. Each PCB board (320) is provided with a group of ultrasonic directional sound generating units (340). Each group of ultrasonic directional sound generating units (340) is arranged on the PCB board (320) in an equidistant spaced array manner.

3. The linear ultrasonic directional sound device according to claim 1, wherein The first mounting bracket (330) includes a middle bracket (331) and two side brackets (332) respectively disposed on both sides of the middle bracket (331). The side brackets (332) extend obliquely in the direction of the front cover plate (120) along the sides of the middle bracket (331). The middle bracket (331) is fixedly connected to the support frame (110). The multiple PCB boards (320) are disposed on the side of the middle bracket (331) and the side brackets (332) close to the front cover plate (120). It further includes a resistance element (335). The resistance element (335) is disposed on the side of the first mounting bracket (330) away from the PCB board (320).

4. The linear ultrasonic directional sound device according to claim 3, wherein Reinforcing ribs (333) are provided between the middle bracket (331) and the side brackets (332).

5. The linear ultrasonic directional sound device according to claim 1, wherein The second mounting bracket (220) includes a connecting plate (221) and a mounting bracket (222). The connecting plate (221) is fixedly connected to the support frame (110), the mounting bracket (222) is fixedly connected to the connecting plate (221), the linear array power amplifier unit (210) is disposed on the connecting plate (221), and a plurality of the linear array directional sound emitting units are arranged in a parallel array on the mounting bracket (222).

6. The linear ultrasonic directional sound device according to claim 5, characterized in that, The mounting bracket (222) includes a bottom plate (223) and a side plate (224) vertically disposed on the bottom plate (223). An opening formed by surrounding of the side plate (224) faces away from the front cover plate (120), and mounting holes (225) for mounting the linear array directional sound emitting units are provided on the bottom plate (223).

7. The linear ultrasonic directional sound device according to claim 6, wherein, Sound-absorbing cotton is provided on the inner side of the bottom plate (223), the inner side of the side plate (224), and the side of the connecting plate (221) close to the mounting bracket (222).

8. The linear ultrasonic directional sound device according to claim 1, wherein A first mounting groove (131) is recessed at the lower end of the rear housing (130), and a second mounting groove (132) is recessed at the lower rear side of the rear housing (130). The first mounting groove (131) communicates with the second mounting groove (132).

9. The linear ultrasonic directional sound device according to claim 8, wherein Honeycomb through holes (121) corresponding to the ultrasonic directional sound emitting unit (340) and the linear array power amplifier unit (210) are provided on the front cover plate (120), and a dust-proof net is provided on the honeycomb through holes (121).

10. The linear ultrasonic directional sound device according to claim 1, wherein A handle (133) is provided at the upper end of the lower end of the rear housing (130), and a baffle (140) is provided at the upper end of the front cover plate (120).

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