Intelligent sound zoning alert system

Abstract

The utility model relates to an intelligent sound zoning warning system, including casing, strong sound loudspeaker, directional loudspeaker array and control circuit component, a plurality of strong sound loudspeaker linear arrangement is fixed in the casing and forms strong sound loudspeaker array, directional loudspeaker array sets up below strong sound loudspeaker array, directional loudspeaker array is fixed at the front of support plate, the back of support plate is equipped with the limit hollow post, fixed screw rod penetrates casing lower edge, limit hollow post rear and with casing upper edge fastening, control circuit component is fixed in the casing, control circuit component is connected with strong sound loudspeaker, directional loudspeaker array, and control circuit component is connected with hand held megaphone, and control circuit component will audio signal processing by strong sound loudspeaker and / or directional loudspeaker array sends out. The utility model integrates strong sound loudspeaker array and directional loudspeaker array in one, makes the system have the strong sound warning ability of wide range, long distance and the directional information broadcast ability of strong directivity, good privacy simultaneously.

Description

Technical Field

[0001] This utility model relates to an intelligent sound zone warning system, specifically applied to special maintenance vehicles such as highway patrol cars and sweepers, as well as in-vehicle scenarios that require accurate transmission of road abnormality information to vehicles approaching from behind. Background Technology

[0002] In fields such as public safety, traffic management, emergency evacuation, security for large-scale events, and supervision of specific industrial areas, sound warnings and information broadcasts are indispensable key technologies. Traditional warning systems mainly rely on high-powered loudspeakers (or "sirens"), which generate extremely high sound pressure levels to achieve long-distance, wide-area warnings and coverage. While these systems can effectively attract attention and penetrate noisy environments, they also have significant inherent drawbacks: First, their sound propagation is non-directional, causing serious noise pollution to non-target areas (such as surrounding residential areas, hospitals, schools, etc.) while broadcasting to the target area, leading to public complaints and "nuisance" problems; second, due to the dispersed sound energy, traditional loudspeaker systems are inadequate for precise information delivery to specific directions or groups of people (e.g., issuing instructions to vehicles in specific lanes or people in specific areas), failing to achieve "precise delivery" and resulting in low information transmission efficiency.

[0003] In addition, traditional equipment lacks environmentally adaptive high-intensity sound technology, resulting in weak warning clarity and far-field penetration in complex scenarios: traditional sound units lack background noise processing capabilities, and in complex scenarios such as high-speed driving (engine noise) and heavy rain / strong winds (environmental noise), voice warning signals are easily masked, causing drivers to not be able to hear them clearly; moreover, the far-field sound pressure level is insufficient (usually below 100dB), resulting in weak penetration and inability to achieve effective warnings at long distances (such as more than 200 meters).

[0004] Traditional vehicle-mounted warning devices are mostly single-sound units, providing only fixed-mode horn or voice signals. They cannot flexibly switch between "precise directional warning" (near-field noise reduction) and "long-distance loud sound warning" (far-field penetration protection) functions based on warning distance (near-field / far-field) and ambient noise intensity. Their functionality is limited and their adaptability to different scenarios is poor. With the development of acoustic technology, directional sound technologies (such as parametric array technology and speaker array beamforming technology) are gradually being applied in practice. This provides a possibility for solving the "noise pollution" problem and achieving precise information transmission. However, single directional sound systems also have their limitations: their effective range is relatively limited, especially in scenarios requiring coverage of a wide area or long-distance, global warnings, where their sound pressure level and coverage are often inferior to traditional loudspeakers.

[0005] Furthermore, high-powered loudspeakers typically require stable installations to withstand vibrations during high-power operation, while directional speaker arrays (usually composed of multiple small speaker units) require precise positioning and support to ensure effective beamforming. How to rationally arrange these two components within a compact housing, ensuring easy installation and maintenance of the control circuitry, while simultaneously guaranteeing the acoustic performance of the front enclosure (such as transmittance for different frequencies) and structural strength, remains a problem that has not yet been fully solved in existing product designs. Utility Model Content

[0006] In order to solve the above-mentioned technical problems, the purpose of this utility model is to provide an intelligent sound zone warning system, which integrates strong sound and directional sound technology and has a compact overall structure and reasonable installation structure.

[0007] To achieve the above-mentioned objectives, this utility model adopts the following technical solution: The intelligent sound zone warning system includes a housing, a high-powered speaker, a directional speaker array, and a control circuit assembly. Multiple high-powered speakers are arranged in a line and fixed inside the housing to form a high-powered speaker array. The directional speaker array is positioned below the high-powered speaker array and fixed to the front of a support plate. A limiting hollow column is provided on the back of the support plate. A fixing screw passes through the lower edge of the housing and the limiting hollow column, and is then fastened to the upper edge of the housing. The control circuit assembly is fixed inside the housing and located between the support plate and the housing. The control circuit assembly is connected to the high-powered speaker and the directional speaker array, and is also connected to a handheld megaphone. The control circuit assembly processes the audio signal from the handheld megaphone and then emits it through the high-powered speaker and / or the directional speaker array.

[0008] As a preferred embodiment: the housing includes a front cover and a rear cover, the upper part of the rear cover is provided with a row of mounting slots, the four corners of the mounting slots are provided with fixing plates, and multiple high-powered speakers are respectively embedded in the corresponding mounting slots, and the edges are fixed to the fixing plates by bolts.

[0009] As a preferred embodiment, the inner wall of the rear shell is further provided with a fixing post, and the control circuit assembly abuts against the fixing post and is fixed by bolts.

[0010] As a preferred embodiment: the front cover has honeycomb holes, the upper part of the front cover is a high-intensity sound area, the middle and lower part is a directional sound area, and the diameter of the honeycomb holes in the high-intensity sound area is smaller than the diameter of the honeycomb holes in the directional sound area.

[0011] As a preferred embodiment, the thickness of the high-intensity sound region on the front cover is greater than the thickness of the directional sound region, and the high-intensity sound region and the directional sound region are transitioned by a slope.

[0012] As a preferred embodiment: the control circuit assembly includes a central processing unit, a high-power amplifier module, a directional amplifier module, an automatic switching switch, a time controller, and a noise sensor. The central processing unit is connected to the high-power speaker and the directional speaker array through the high-power amplifier module and the directional amplifier module, respectively. The automatic switching switch, the time controller, and the noise sensor are all connected to the central processing unit, and the automatic switching switch is also connected to the high-power amplifier module and the directional amplifier module, respectively. The automatic switching switch enables the audio signal to be emitted from the high-power speaker and / or the directional speaker array.

[0013] As a preferred embodiment, the central processing unit uses the AIR724UG-NFM chip, and the noise sensor is connected to pins 35, 36, and 37 of the central processing unit via the SP3485EN chip.

[0014] As a preferred embodiment: the handheld megaphone is connected to pins 21 and 22 of the central processing unit, and the handheld megaphone is also connected to a step-down module, which uses an L4016 wide voltage power input chip.

[0015] As a preferred embodiment: the automatic switching switch uses an STM32F407 chip to control the audio signal emitted from the loudspeaker and / or directional speaker array, and the time controller provides a time control signal to the central processing unit through a crystal oscillator.

[0016] As a preferred embodiment, an audio processing module is also provided between the high-power amplifier module, the directional amplifier module and the central processing unit.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention integrates a high-powered loudspeaker array and a directional loudspeaker array into one system, enabling a single system to simultaneously provide wide-range, long-distance, omnidirectional high-powered sound warning capabilities and highly directional, private information broadcasting capabilities, overcoming the limitations of single technologies. Furthermore, by utilizing control circuit components to connect a handheld megaphone, operators can input audio in the most familiar and direct way, and the control system intelligently selects the output terminal (high-powered, directional, or both simultaneously), greatly improving the system's human-computer interaction and on-site response flexibility.

[0018] In addition, the directional speaker array is secured inside the housing using a support plate and fixing screws, ensuring a firm installation and convenient operation. Furthermore, the limiting hollow column on the back of the support plate, in conjunction with the fixing screw that penetrates the housing, not only reliably fixes the support plate and control circuit components, but also cleverly utilizes the hollow column to form a cable routing channel, resulting in a neat internal structure and improved assembly efficiency and structural stability. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute a limitation thereof.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 and Figure 3 These are two different exploded structural diagrams of this utility model; Figure 4 This is a schematic diagram of the connection structure of the control circuit assembly, the loudspeaker, and the directional speaker array of this utility model. Figure 5 and Figure 6 This is a schematic diagram of the chip structure of the central processing unit of this utility model; Figure 7 This is a schematic diagram of the structure of the conversion chip, which is connected to the noise sensor of this utility model and the central processing unit. Figure 8 This is a schematic diagram of the audio processing chip of this utility model.

[0021] The following are marked in the diagram: 1. Front cover; 11. High-intensity sound area; 12. Directional sound area; 2. Rear shell; 21. Mounting slot; 22. Fixing post; 3. High-intensity speaker; 4. Directional speaker array; 5. Support plate; 51. Limiting hollow post; 6. Control circuit assembly; 7. Fixing screw. Detailed Implementation

[0022] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0023] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0024] Furthermore, in the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments: like Figures 1 to 3As shown, the intelligent sound zone warning system includes a housing, a high-powered speaker 3, a directional speaker array 4, and a control circuit assembly 6. Multiple high-powered speakers 3 are arranged in a line and fixed inside the housing to form a high-powered speaker array. The directional speaker array 4 is located below the high-powered speaker array and is fixed to the front of a support plate 5. A limiting hollow column 51 is provided on the back of the support plate 5. A fixing screw 7 passes through the lower edge of the housing and the limiting hollow column 51 and is then fastened to the upper edge of the housing. The control circuit assembly 6 is fixed inside the housing and located between the support plate 5 and the housing. The control circuit assembly is connected to the high-powered speaker 3 and the directional speaker array 4, and is also connected to a handheld megaphone. The control circuit assembly processes the audio signal from the handheld megaphone and then emits it through the high-powered speaker 3 and / or the directional speaker array 4.

[0029] This utility model's system combines a high-powered loudspeaker and a directional loudspeaker array. Through the modular combination of the two sound-generating units and control circuit components, it achieves a second-level switching between "targeted warning" and "high-powered alarm," adapting to warning needs in different distances and noise environments. Furthermore, the directional loudspeaker array uses "targeted loudspeaker + acoustic parametric array technology" to achieve ultra-narrow angle (core sound constraint angle ±15°) directional sound wave projection, accurately locking onto vehicles approaching from behind while avoiding noise interference from non-target areas.

[0030] The housing includes a front cover 1 and a rear cover 2. The upper part of the rear cover 2 has a row of mounting slots 21. Fixing plates are located at the four corners of each mounting slot 21. Multiple high-powered speakers 3 are respectively embedded in their respective mounting slots 21, and their edges are fixed to the fixing plates with bolts. The dedicated mounting slots ensure precise positioning and a neat, linear arrangement of the multiple high-powered speakers, which is crucial for sound wave superposition and array effects. The four corner bolts provide extremely high mechanical strength, capable of withstanding the severe vibrations generated by the high-powered speakers during high-power operation, preventing damage or noise due to loosening.

[0031] The inner wall of the rear shell 2 is also provided with a fixing post 22, and the control circuit assembly 6 abuts against the fixing post and is fixed by bolts. Suspending and fixing the control circuit assembly with the fixing post avoids stress problems that might arise from direct contact with the shell, while also saving internal space and allowing for cable routing and air circulation. This installation method can isolate vibrations from the speaker to a certain extent, protecting delicate electronic components from long-term vibration and improving the long-term stability of the system.

[0032] The front cover 1 has honeycomb holes. The upper part of the front cover 1 is the high-power sound area 11, and the middle and lower part is the directional sound area 12. The honeycomb hole diameter of the high-power sound area 11 is smaller than that of the directional sound area. The smaller hole diameter in the high-power sound area can effectively prevent larger foreign objects (such as fingers, branches, etc.) from entering and impacting the powerful and more fragile diaphragm of the high-power sound speaker, providing better physical protection. On the other hand, the directional sound waves in the directional sound area (especially those generated using the parametric array principle) usually contain more high-frequency components. The larger hole diameter can reduce the obstruction and attenuation of high-frequency sound waves, which is beneficial to maintaining the clarity and fidelity of directional sound.

[0033] The thickness of the high-intensity acoustic region 11 on the front cover 1 is greater than the thickness of the directional acoustic region 12, and the high-intensity acoustic region 11 and the directional acoustic region 12 are transitioned by a slope. The greater thickness of the high-intensity acoustic region gives it higher structural strength, enabling it to better resist possible impacts and the strong sound pressure generated by the high-intensity horn, preventing resonance deformation. The thinner thickness of the directional acoustic region reduces the obstruction and reflection of sound waves, which is particularly beneficial to the transmission of sound waves from the directional horn array, ensuring its beamforming effect and sound quality. At the same time, the sloped transition between the two avoids abrupt changes in thickness, resulting in a more uniform stress distribution in the shell structure, and also making it more aesthetically pleasing.

[0034] like Figures 4 to 8 As shown, the control circuit assembly 6 includes a central processing unit, a high-power amplifier module, a directional amplifier module, an automatic switching switch, a time controller, and a noise sensor. The central processing unit is connected to the high-power speaker 3 and the directional speaker array 4 through the high-power amplifier module and the directional amplifier module, respectively. The automatic switching switch, the time controller, and the noise sensor are all connected to the central processing unit, and the automatic switching switch is also connected to the high-power amplifier module and the directional amplifier module, respectively. The automatic switching switch enables the audio signal to be emitted from the high-power speaker 3 and / or the directional speaker array 4.

[0035] This utility model features a modular overall system design. The clear module division facilitates circuit design, debugging, and maintenance, and also allows for future functional upgrades. An automatic switching switch enables automatic or manual switching of operating modes (omnidirectional loud sound, directional broadcast, and mixed mode), meeting the immediate needs of different scenarios. Simultaneously, a noise sensor gives the system environmental awareness. In noisy environments, it automatically increases the volume or switches to a more penetrating loud sound mode; in quiet environments, it automatically decreases the volume or uses directional mode, achieving adaptive output and optimizing the user experience.

[0036] This utility model's powerful loudspeaker, combined with corresponding control circuit components, enables the loudspeaker's sound pressure level to reach over 128dB, ensuring far-field coverage. Through algorithms, it separates and enhances the human voice frequency band in real time, ensuring the clarity and penetration of voice warnings in complex noise environments.

[0037] The central processing unit (CPU) uses an AIR724UG-NFM chip, and the noise sensor is connected to pins 35, 36, and 37 of the CPU via an SP3485EN chip. The handheld megaphone is connected to pins 21 and 22 of the CPU and also has a step-down module using an L4016 wide-voltage power input chip. The automatic switching switch uses an STM32F407 chip to control the audio signal emitted from the loudspeaker 3 and / or the directional speaker array 4. The time controller provides timing control signals to the CPU via a crystal oscillator. An audio processing module is also provided between the loudspeaker module, the directional amplifier module, and the CPU. This audio processing module preprocesses the audio signal to better match the electrical and acoustic characteristics of the subsequent amplifiers and speaker units, improving the overall sound quality stability and efficiency.

[0038] In summary, this utility model is a vehicle-mounted early warning device that integrates acoustic parametric array directional sound generation technology and high-intensity sound generation technology. By modularly integrating the "targeted directional sound generation unit" and the "high-intensity high-definition sound generation unit", it solves the dual acoustic requirements of "precise coverage" and "efficient penetration" in vehicle-mounted early warning scenarios. It belongs to the category of vehicle-mounted equipment in the field of traffic safety that focuses on the upgrading of acoustic early warning technology.

[0039] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. An intelligent sound-zoned alarm system, characterized in that: The device includes a housing, a loudspeaker (3), a directional speaker array (4), and a control circuit assembly (6). Multiple loudspeakers (3) are arranged in a line and fixed inside the housing to form a loudspeaker array. The directional speaker array (4) is located below the loudspeaker array and is fixed to the front of a support plate (5). The back of the support plate (5) is provided with a limiting hollow column (51). A fixing screw (7) passes through the lower edge of the housing and the limiting hollow column (51) and is then fastened to the upper edge of the housing. The control circuit assembly (6) is fixed inside the housing and located between the support plate (5) and the housing. The control circuit assembly is connected to the loudspeaker (3) and the directional speaker array (4), and is also connected to a handheld megaphone. The control circuit assembly processes the audio signal from the handheld megaphone and then emits it through the loudspeaker (3) and / or the directional speaker array (4).

2. The intelligent sound zone alarm system according to claim 1, characterized in that: The housing includes a front cover (1) and a rear cover (2). The upper part of the rear cover (2) is provided with a row of mounting slots (21). The four corners of the mounting slots (21) are provided with fixing plates. Multiple loudspeakers (3) are respectively embedded in the corresponding mounting slots (21), and the edges are fixed to the fixing plates by bolts.

3. The intelligent sound zone alarm system according to claim 2, characterized in that: The inner wall of the rear shell (2) is also provided with a fixing post (22), and the control circuit assembly (6) abuts against the fixing post and is fixed by bolts.

4. The intelligent sound zone alarm system according to claim 2, characterized in that: The front cover (1) has honeycomb holes. The upper part of the front cover (1) is a high-intensity sound area (11), and the middle and lower part is a directional sound area (12). The honeycomb hole diameter of the high-intensity sound area (11) is smaller than that of the honeycomb hole diameter of the directional sound area.

5. The intelligent sound zone warning system according to claim 2, characterized in that: The thickness of the high-intensity sound region (11) on the front cover (1) is greater than the thickness of the directional sound region (12), and the high-intensity sound region (11) and the directional sound region (12) are connected by a slope.

6. The intelligent sound zone alarm system according to claim 1, characterized in that: The control circuit assembly (6) includes a central processing unit, a high-power amplifier module, a directional amplifier module, an automatic switching switch, a time controller, and a noise sensor. The central processing unit is connected to the high-power speaker (3) and the directional speaker array (4) through the high-power amplifier module and the directional amplifier module, respectively. The automatic switching switch, the time controller, and the noise sensor are all connected to the central processing unit. The automatic switching switch is also connected to the high-power amplifier module and the directional amplifier module, respectively. The automatic switching switch enables the audio signal to be emitted from the high-power speaker (3) and / or the directional speaker array (4).

7. The intelligent sound zone alarm system according to claim 6, characterized in that: The central processing unit uses the AIR724UG-NFM chip, and the noise sensor is connected to pins 35, 36, and 37 of the central processing unit via the SP3485EN chip.

8. The intelligent sound zone alarm system according to claim 6, characterized in that: The handheld megaphone is connected to pins 21 and 22 of the central processing unit. The handheld megaphone is also connected to a step-down module, which uses an L4016 wide voltage power input chip.

9. The intelligent sound zone alarm system according to claim 6, characterized in that: The automatic switching switch uses an STM32F407 chip to control the audio signal emitted from the loudspeaker (3) and / or the directional speaker array (4). The time controller provides a time control signal to the central processing unit through a crystal oscillator.

10. The intelligent sound zone alarm system according to claim 6, characterized in that: An audio processing module is also provided between the high-power amplifier module, the directional amplifier module and the central processing unit.

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