Intelligent lamp pole with voice broadcasting device

Abstract

The application discloses a smart lamp pole provided with a voice broadcasting device, which comprises a damping connection layer, a platform interface layer, an execution layer and an environment adaptation layer; the damping connection layer is used for dissipating and isolating the vibration of the lamp pole body, and comprises a central connecting disc and a plurality of composite damping connecting rods; the platform interface layer comprises a platform base shell and a platform plate, and the platform base shell is internally provided with an active stabilizing mechanism capable of switching the platform plate between a suspended state and a rigid locking state; the execution layer is installed for realizing the directional projection and adjustment of a sound beam. The composite damping connecting rods of the damping connection layer can efficiently dissipate the large-amplitude low-frequency vibration energy of the lamp pole body, and the active high-frequency vibration isolation provided by the suspended state of the platform interface layer can construct an extremely stable working platform for the execution layer at the top, and the design of the structure can make the directivity of the broadcast sound beam extremely stable, effectively prepare an effective coverage area, and greatly improve the voice intelligibility index of a remote receiving point.

Description

Technical Field

[0001] This invention relates to the field of smart light poles, and more particularly to a smart light pole equipped with a voice broadcasting device. Background Technology

[0002] With the advancement of smart city construction, multifunctional smart light poles, as core carriers of urban public infrastructure, are gradually replacing traditional single-function lighting poles. Modern smart light poles integrate multiple functions such as lighting, environmental monitoring, information dissemination, security monitoring, and public address systems. Among these, voice broadcasting plays an irreplaceable role in disseminating urban public information, emergency command, background music playback, and community services. However, existing smart light poles with integrated voice broadcasting functions face systemic technical bottlenecks in terms of long-term acoustic directional stability and equipment reliability in complex urban wind conditions, severely restricting the full realization of their functions.

[0003] Firstly, the broadcasting equipment on traditional smart light poles is typically fixed directly to the pole body via rigid brackets or simple universal joints. As a tall, slender structure, the light pole inevitably experiences low-frequency swaying and vortex-induced vibrations under natural winds (especially urban canyon winds). This vibration is directly transmitted to the broadcasting equipment, causing continuous jitter and shift in its acoustic pointing axis. For example, at a wind speed of 8 m / s, the swaying angular displacement at the top of the light pole can reach ±0.5° to ±2°, directly causing a significant drift in the sound beam coverage area, a sharp decrease in the clarity of distant sounds, and in severe cases, even acoustic feedback howling. Existing solutions mostly involve adding structural damping or mass blocks, which can slightly reduce the amplitude but cannot fundamentally isolate the vibration from interfering with the precision pointing mechanism.

[0004] Secondly, to ensure acoustic performance, the sound outlets of broadcast equipment are often exposed to the external environment. This makes the speaker units and sound outlet channels highly susceptible to rain, snow, and dust intrusion, leading to component corrosion and sound quality degradation. More importantly, the environmental noise generated by wind and rain (the sound of raindrops hitting the ground, the turbulence noise of wind blowing over poles) can severely mask the broadcast content. Existing designs often use simple rain covers or grilles, which cannot solve the noise interference problem and may even generate additional wind noise due to improper structure.

[0005] Furthermore, to maintain the stable operation of the broadcasting system, some solutions employ continuously operating active control or cooling systems, resulting in significant energy consumption. This contradicts the green and low-carbon principles that smart light poles, as carriers of energy-saving lighting equipment, should adhere to. Current technologies lack a mechanism for intelligently coordinating the operating modes of the acoustic system (such as directional adjustment and power output) with the dimming strategies of the light pole's own energy-saving lighting equipment, as well as environmental energy harvesting (such as utilizing wind vibration energy), thus overall energy efficiency needs optimization.

[0006] In summary, existing smart light poles with integrated broadcasting functions have largely focused on simple functional additions or localized sound quality optimizations, failing to address the typical and persistent disturbance source of urban wind-induced vibration from a systems engineering perspective. This has resulted in a comprehensive solution encompassing mechanical vibration isolation, acoustic interference suppression, environmental protection, and intelligent energy efficiency management. Furthermore, the various subsystems (such as stabilizing structures, acoustic arrays, and protective enclosures) are often designed in isolation, lacking inherent coupling and synergy around a unified physical problem (wind-induced vibration). Summary of the Invention

[0007] The technical problem solved by this invention is to provide a smart light pole equipped with a voice broadcasting device.

[0008] This application provides a smart light pole equipped with a voice broadcasting device, including a light pole body and an energy-saving lighting device and a voice broadcasting component mounted thereon. The light pole body has a vertically layered stable structure inside, including: A damping connection layer, fixed inside the lamp post body, is used to dissipate and isolate the vibration of the lamp post body. It includes a central connecting plate and multiple composite damping connecting rods connected between the central connecting plate and the inner wall of the lamp post body. The platform interface layer, connected above the damping connection layer, includes a platform base housing and a platform plate. The platform base housing is connected to the central connecting disk via a ball joint, and has an active stabilizing mechanism inside that enables the platform plate to switch between a suspended state and a rigidly locked state. The execution layer, mounted on the platform plate, includes a linear drive mechanism and a composite acoustic array. The driving direction of the linear drive mechanism is consistent with the radial direction of the lamp post body. The composite acoustic array is fixed vertically to the output end of the linear drive mechanism, and its sound emission direction is perpendicular to the axis of the lamp post body. An environmental adaptation layer includes a protective cabin that can be raised and lowered and fitted onto the outside of the light pole body; The lamp post body has a first opening on its side wall and the protective cabin has a second opening on its side wall. The protective cabin moves up and down to align or offset the second opening with the first opening in the vertical direction, thereby opening or closing the access channel of the composite acoustic array.

[0009] Furthermore, the composite damping linkage includes an outer cylinder, an inner rod, a hydraulic damping unit, and a butterfly spring assembly; one end of the inner rod is hinged to the central connecting plate, and the other end extends into the outer cylinder and slides therewith; the hydraulic damping unit is fixed to the end of the inner wall of the outer cylinder, and its piston rod is connected to the end of the inner rod; the butterfly spring assembly is installed in the annular groove of the inner wall of the outer cylinder and contacts the shoulder of the inner rod through a pressure transmission plate.

[0010] Furthermore, the composite damping linkage also includes a limiting rubber block, which is disposed on the inner end face of the outer cylinder and is used to provide buffering and hard limiting when the inner rod retracts.

[0011] Furthermore, the active stabilization mechanism includes an electromagnetic levitation module and a hydraulic locking mechanism disposed within the platform base housing; the electromagnetic levitation module includes four sets of electromagnets disposed at the bottom of the platform base housing and arranged in a square, displacement sensors disposed corresponding to the electromagnets, and auxiliary springs arranged around the electromagnets; the hydraulic locking mechanism includes two sets of locking cylinders symmetrically disposed on the upper part of the side wall of the platform base housing and a wedge block driven by the locking cylinders and capable of horizontal movement; the edge of the platform plate is provided with a wedge groove that cooperates with the wedge block.

[0012] Furthermore, the linear drive mechanism is a linear module or a multi-stage telescopic arm, with its fixed end mounted on the upper surface of the platform plate via a bracket, and its moving end extending radially outward along the lamp post body; the composite acoustic array is fixed to the end of the moving end.

[0013] Furthermore, the composite acoustic array includes a main loudspeaker array and an auxiliary vortex ring generator array; the loudspeaker units of the main loudspeaker array are arranged vertically, and the sound emission direction of all loudspeaker units and the sound emission direction of the vortex ring generator array are horizontally pointing towards the direction of the first opening; the composite acoustic array has phased array beamforming capability, and can adjust the beam direction in the horizontal plane through electronic scanning.

[0014] Furthermore, the inner sides of the upper and lower edges of the second opening of the protective cabin are provided with annular sealing strips; when the protective cabin rises to the protective position, the second opening is perpendicularly offset from the first opening, and the annular sealing strip is pressed against the complete outer wall surface of the lamp post body, sealing the first opening inside the protective cabin; when the protective cabin descends to the working position, the second opening is perpendicularly aligned with the first opening, forming a through passage.

[0015] Furthermore, the protective chamber is equipped with a temperature control system, which includes a semiconductor cooling chip attached to the inner wall of the protective chamber, an aluminum finned heat sink thermally connected to the semiconductor cooling chip, and a DC fan mounted on the heat sink.

[0016] Furthermore, the lamp post body is also equipped with an environmental sensor group, which includes a wind speed sensor for monitoring wind speed, a rain sensor for monitoring rainfall, and a microphone array for monitoring environmental noise.

[0017] Furthermore, the smart light pole also includes an intelligent control unit, which automatically controls the system to switch between normal floating broadcast mode, strong wind locking anti-interference mode, and severe weather storage and protection mode based on data from the environmental sensor group. Preferably, the intelligent control unit is electrically connected to the energy-saving lighting equipment and is configured to coordinate the lighting brightness with the power status of the voice broadcasting component based on time period or pedestrian density information.

[0018] Compared with existing technologies, this invention efficiently dissipates the large low-frequency vibration energy of the lamp post body through the composite damping linkage of the damping connection layer, and combines the active high-frequency vibration isolation provided by the suspension state of the platform interface layer to build an extremely stable working platform for the top execution layer. The design of this structure makes the directivity of the broadcast sound beam exceptionally stable, effectively covering the area, and greatly improving the voice clarity index of distant receiving points, thus greatly improving the auditory effect of public broadcasting. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention.

[0020] Figure 1 This is a schematic diagram of the structure of the smart light pole equipped with a voice broadcasting device when it is stored and sealed according to the present invention; Figure 2 This is a cross-sectional view of the smart light pole equipped with a voice broadcasting device of the present invention when it broadcasts outside the cabin; Figure 3 This is a top view of the central connecting disk of the present invention; Figure 4 This is a cross-sectional view of the composite damping link of the present invention; Figure 5 This is a cross-sectional view of the platform interface layer of the present invention in a floating state; Figure 6 This is a cross-sectional view of the platform interface layer of the present invention in a locked state; Figure 7 This is a top view of the platform base shell of the present invention; Figure 8 This is a side view of the composite acoustic array of the present invention; Figure 9 This is a schematic diagram of the phased array beamforming principle of the present invention; Figure 10 This is a schematic diagram of the protective cabin and temperature control system of the present invention; Figure 11 This is a logic block diagram of the intelligent control and mode switching of the present invention.

[0021] The reference numerals in the attached figures include: 1. Lamp post body; 2. Damping connection layer; 21. Central connecting plate; 22. Composite damping connecting rod; 221. Outer cylinder; 222. Inner rod; 223. Hydraulic damping unit; 224. Butterfly spring assembly; 225. Limiting rubber block; 226. Pressure transmission plate; 3. Platform interface layer; 31. Platform base shell; 32. Active stabilization mechanism; 321. Electromagnet; 322. Displacement sensor; 323. Auxiliary spring; 324. Locking cylinder; 325. Wedge block; 33. Platform plate; 34. Wedge groove; 4. Handle 41. Linear drive mechanism; 42. Composite acoustic array; 421. Main loudspeaker array; 422. Vortex ring generator array; 5. Environmental adaptation layer; 51. Protective cabin; 52. Second opening; 53. Annular sealing strip; 6. Microphone array; 7. Intelligent control unit; 8. First opening; 9. Rain sensor; 10. Energy-saving lighting equipment; 11. Temperature control system; 111. Semiconductor cooling chip; 112. Heat sink; 113. DC fan; 114. Temperature and humidity sensor; 12. Wind speed sensor. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0023] like Figures 1 to 3 As shown, the smart light pole of the present invention, equipped with a voice broadcasting device, includes a light pole body 1 and an energy-saving lighting device 10 and a voice broadcasting component mounted thereon. The light pole body 1 has a vertically layered stable structure inside, including a damping connection layer 2, a platform interface layer 3, an execution layer 4, and an environmental adaptation layer 5. The damping connection layer 2 is fixed inside the light pole body 1 to dissipate and isolate vibrations of the light pole body 1. It includes a central connecting plate 21 and multiple composite damping connecting rods 22 connecting the central connecting plate 21 to the inner wall of the light pole body 1. The platform interface layer 3 is connected above the damping connection layer 2 and includes a platform base housing 31 and a platform plate 33. The platform base housing 31 is connected to the central connecting plate 21 via a ball joint (i.e., the bottom of the platform base housing 31 is machined with a ball joint, such as...). Figure 5As shown, a ball joint is formed with the ball head of the ball head connecting rod to allow ±5° swing (the ball head connecting rod is located on the top of the central connecting plate 21), and an active stabilizing mechanism 32 is provided inside to allow the platform plate 33 to switch between a suspended state and a rigid locking state; the execution layer 4 is installed on the platform plate 33 and includes a linear drive mechanism 41 and a composite acoustic array 42. The driving direction of the linear drive mechanism 41 is consistent with the radial direction of the lamp post body 1. The composite acoustic array 42 is fixed in a vertical posture at the output end of the linear drive mechanism 41, and its sound emission direction is perpendicular to the axis of the lamp post body 1; the environmental adaptation layer 5 includes a protective cabin 51 that can be lifted and fitted outside the lamp post body 1; wherein, the side wall of the lamp post body 1 has a first opening 8, and the side wall of the protective cabin 51 has a second opening 52; the protective cabin 51 moves up and down to make the second opening 52 aligned or offset from the first opening 8 in the vertical direction, thereby opening or closing the passage for the composite acoustic array 42.

[0024] This invention utilizes the composite damping link 22 of the damping connection layer 2 to efficiently dissipate the large low-frequency vibration energy of the lamp post body 1, combined with the active high-frequency vibration isolation provided by the suspension state of the platform interface layer 3, to construct an extremely stable working platform for the top execution layer 4. Experiments show that under wind speeds of 2 m / s (approximately level 6 wind), the angular displacement fluctuation of the acoustic array mounting platform of this invention can be controlled within ±0.1°, while the fluctuation of traditional rigid mounting methods exceeds ±1.5°. This makes the directivity of the broadcast sound beam exceptionally stable, effectively covering the area, and greatly improving the voice clarity index at distant receiving points, significantly enhancing the auditory effect of public broadcasting. In addition, through the design of the composite acoustic array 42 in the execution layer 4, it can actively adapt to the sound propagation conditions of windy and rainy weather, optimize the sound beam shape to resist wind deflection, and utilize diaphragmless generation technology to avoid the impact of rainwater intrusion. The environmentally adaptable liftable protective cabin 51 provides physical-level rapid protection, and in extreme weather conditions such as heavy rain, hail, and sandstorms, it can complete the storage and sealing of the acoustic system within tens of seconds, preventing equipment damage.

[0025] Specifically, to achieve the layered stable structure integration of the present invention, the lamp post body 1 has undergone special structural design in key areas: 1. Installation groove structure: At the preset installation height in the middle of the lamp post body 1, a cylindrical groove with three-level annular positioning steps is formed by rolling and welding the plate.

[0026] The first step: located on the outermost side, with the largest diameter (e.g., Φ398mm) and the shallowest depth (e.g., 10mm). The upper surface of this step serves as the mounting reference plane and is machined with an annular sealing groove for installing a rubber sealing ring to ensure a tight seal with subsequent installed components.

[0027] The second step: Located inside the first step, with a slightly smaller diameter (e.g., Φ390mm) and moderate depth (e.g., 15mm). An annular limiting groove is machined on the vertical sidewall of this step. This groove is used to engage with the flange or a special retaining ring of the central connecting disc 21 of the damping connection layer 2, achieving precise radial positioning and anti-rotation limiting of the central connecting disc 21.

[0028] The third step: located at the innermost edge, with the smallest diameter (e.g., Φ380mm) and the largest depth (e.g., 125mm). This step forms the main load-bearing cavity of the groove, and its bottom surface serves as the mounting surface for the main components of the damping connection layer 2. A reinforced mounting base with internal threads is typically pre-welded to the center of this bottom surface for any necessary auxiliary connections later.

[0029] This three-tiered design enables precise and secure installation of the central connecting plate 21 through "planar support, radial limiting, and axial accommodation".

[0030] 2. Internal reinforcement structure: Annular stiffening ribs: Annular stiffening ribs are welded at equal intervals (e.g., 800 mm) on the inner wall of the pole body 1, particularly in the area approximately 500 mm above and below the mounting groove. The ribs are 6-8 mm thick and 30-50 mm high, used to enhance the local stiffness of the pole and suppress local buckling.

[0031] Cross-shaped support frame: Approximately 200mm directly below the mounting groove, a cross-shaped or star-shaped support frame is welded into the inner cavity of the lamp post. This support frame is welded from angle steel or steel plate, and its main functions are: first, to serve as the main connection and force transmission base for the end flange of the outer cylinder 221 of the aforementioned composite damping connecting rod 22, effectively distributing and transferring the load borne by the connecting rod to the lamp post wall; second, to enhance the overall bending and torsional stiffness of this area.

[0032] Longitudinal guide grooves: At least two (usually four, distributed at 90°) longitudinal guide grooves are arranged along the axial direction on the inner wall of the light pole to guide and fix internal cables and hydraulic pipelines, and to provide a guiding reference for the lifting mechanism.

[0033] In some embodiments, such as Figure 4As shown, the composite damping link 22 includes an outer cylinder 221, an inner rod 222, a hydraulic damping unit 223, and a butterfly spring assembly 224. One end of the inner rod 222 is hinged to the central connecting plate 21, and the other end extends into the outer cylinder 221 and slides therewith. The hydraulic damping unit 223 is fixed to the end of the inner wall of the outer cylinder 221, and its piston rod is connected to the end of the inner rod 222. The butterfly spring assembly 224 is installed in the annular groove of the inner wall of the outer cylinder 221 and contacts the shoulder of the inner rod 222 through the pressure transmission plate 226 to provide nonlinear restoring force and dissipate the vibration energy transmitted by the lamp post. The composite damping link 22 also includes a limiting rubber block 225, which is disposed on the inner end face of the outer cylinder 221 to provide buffering and hard limiting when the inner rod 222 retracts.

[0034] This embodiment achieves composite damping characteristics through the parallel combination of hydraulic damping unit 223 and disc spring assembly 224. Hydraulic damping unit 223 provides velocity-dependent viscous damping, which is particularly effective in suppressing velocity peaks of low-frequency oscillations; disc spring assembly provides displacement-dependent nonlinear stiffness and hysteresis damping, particularly adept at absorbing and dissipating mid-to-high frequency vibration energy, and generating gradually increasing restoring force for large displacements. This design enables the linkage to efficiently and directionally dissipate vibration energy across a wide frequency range (e.g., 0.1Hz to 10Hz), reducing the vibration energy transmitted to the central connecting plate 21 by more than 60%. Furthermore, under strong winds or rare gusts, the lamp post deformation may exceed the normal range. Therefore, this embodiment provides progressive hard-limit protection through the combined action of limiting rubber block 225 and disc spring assembly. When the inner rod 222 retracts to near its limit position, it is first buffered by a rapidly increasing nonlinear restoring force provided by the disc spring assembly; if the displacement continues to increase, the end of the inner rod 222 eventually contacts the limiting rubber block 225.

[0035] Specifically, the inner wall of the lamp post body 1 is provided with a mounting groove, and the central connecting plate 21 sits on the first step of the mounting groove through its outer edge protrusion ring and is fixed by a pressure ring. The composite damping connecting rods 22 are connected radially at an angle of approximately 60°. The inner rod 222 of each connecting rod is connected to the lug of the central connecting plate 21 through a spherical bearing (e.g., Figure 3 As shown), the end of the outer cylinder 221 is fixed to the reinforcing rib on the inner wall of the lamp post via a flange.

[0036] In some embodiments, such as Figures 5 to 7As shown, the active stabilization mechanism 32 includes an electromagnetic levitation module and a hydraulic locking mechanism disposed within the platform base housing 31; the electromagnetic levitation module includes four sets of electromagnets 321 disposed at the bottom of the platform base housing 31 and arranged in a square, displacement sensors 322 disposed corresponding to the electromagnets 321, and auxiliary springs 323 arranged around the electromagnets 321; the hydraulic locking mechanism includes two sets of locking cylinders 324 symmetrically disposed on the upper side wall of the platform base housing 31 and a wedge block 325 driven by the locking cylinders 324 and capable of horizontal movement; the edge of the platform plate 33 is provided with a wedge groove 34 that cooperates with the wedge block 325.

[0037] This embodiment creatively distinguishes between two typical operating conditions and provides the optimal solution. Under normal or light wind (wind speed <8m / s) conditions, the electromagnetic levitation module operates (e.g. Figure 5 As shown), a closed-loop active control system consisting of four sets of electromagnets 321 and a high-resolution displacement sensor 322 maintains a constant (e.g., 10mm) precision air gap between the platform plate 33 and the base housing. This effectively isolates all mid-to-high frequency vibrations from the light pole (such as vortex-induced vibration and equipment self-vibration), providing a sub-millimeter-level stable "aerial platform" for the acoustic array, which is the physical basis for achieving highly directional broadcasting. When facing strong winds (wind speed ≥8m / s) (e.g.) Figure 6 As shown, the system seamlessly switches to the hydraulic locking mechanism's dominant state: the locking cylinder 324 quickly drives the wedge block 325 to horizontally wedge into the wedge groove 34 on the edge of the platform plate 33, rigidly connecting the platform plate 33, the electromagnet 321 core, and the base housing into a single unit. This state provides extremely high anti-overturning moment and lateral stiffness, capable of withstanding the enormous quasi-static load generated by strong winds and protecting the levitation mechanism itself. Furthermore, the auxiliary spring 323 surrounding the electromagnet 321 plays multiple safety roles: providing basic mechanical support before the electromagnetic levitation system is energized or in the event of a sudden power outage, preventing the platform plate 33 from falling and impacting; providing additional passive damping during levitation operation, enhancing system stability; and sharing the load with the wedge block 325 in the locked state. The wedge block 325 design of the hydraulic locking mechanism utilizes the inclined plane self-locking principle. After the cylinder provides initial thrust, even if the hydraulic system loses pressure, the mechanical structure can still maintain the locked state, providing high safety redundancy. When locked, the electromagnetic levitation module does not bear any working load, which avoids long-term operation under high current, reduces heat generation and aging, and extends the life of electromagnetic components.

[0038] Specifically, a pneumatic vibration isolator and height adjustment bolts are installed between the platform plate 33 and the top flange of the housing. During normal operation (i.e., in suspended broadcast mode, such as...) Figure 5As shown), when electromagnet 321 is energized, under the closed-loop control of displacement sensor 322, the platform plate 33 is stably suspended, maintaining a gap of approximately 10mm ± 0.05mm with the housing. Auxiliary spring 323 provides slight preload and damping. When wind speed sensor 12 detects that the wind speed exceeds a set threshold (e.g., 8m / s), the system switches to a strong wind lockout anti-interference mode (e.g., ...). Figure 6 As shown): the electromagnetic force weakens, the platform plate 33 falls and contacts the flange, and then the two sets of locking cylinders 324 on the upper part of the housing side wall are activated, driving the wedge block 325 to wedge horizontally into the wedge groove 34 on the edge of the platform plate 33 to achieve rigid mechanical locking. At this time, the auxiliary spring 323 is compressed, and the electromagnet 321 can be completely de-energized.

[0039] In some embodiments, the linear drive mechanism 41 is a linear module or a multi-stage telescopic arm, with its fixed end mounted on the upper surface of the platform plate 33 via a bracket, and its moving end extending outward along the radial direction of the lamp post body 1; the composite acoustic array 42 is fixed to the end of the moving end.

[0040] Specifically, the linear drive mechanism 41 adopts a high-precision ball screw linear module. Its fixed end is installed on the center area of ​​the upper surface of the platform plate 33 through an 80mm thick aluminum alloy bracket. The drive direction is precisely aligned with the first opening 8 on the side wall of the lamp post. The moving end of the module is designed with a special mounting flange for fixing the composite acoustic array 42.

[0041] In some embodiments, such as Figure 8 , Figure 9 As shown, the composite acoustic array 42 includes a main loudspeaker array 421 and an auxiliary vortex generator array 422; the loudspeaker units of the main loudspeaker array 421 are arranged vertically, and the sound emission direction of all loudspeaker units and the sound emission direction of the vortex generator array 422 are horizontally pointing towards the direction of the first opening 8; the composite acoustic array 42 has phased array beamforming capability and can adjust the beam direction in the horizontal plane through electronic scanning.

[0042] Specifically, the composite acoustic array 42 has a rectangular cabinet structure. The main speaker array 421 consists of eight 3-inch full-range neodymium magnet speaker units, arranged vertically in a straight line with equal spacing. The sound-emitting axes of all speaker units point horizontally, consistent with the radial direction of the lamp post. Four vortex ring generator units are arranged on each side of the main speaker array 421. Each unit consists of a Φ30mm diameter PZT-5H piezoelectric diaphragm, a resonant cavity, and a sharp-edge nozzle. The phased array processing module is integrated at the back of the array and uses an ADAU1467 DSP chip. By independently controlling the delay and gain of each speaker unit, it can achieve electronic beam scanning within a ±30° range in the horizontal plane, adjusting the sound beam coverage direction without mechanical rotation.

[0043] In this embodiment, the composite acoustic array 42 is mounted in a fixed vertical position at the end of the linear drive mechanism 41, and its sound emission direction is fixed to a horizontal direction (i.e., perpendicular to the lamp post axis). The array maintains the same posture in both the stowed and working states, requiring no flipping or rotating motion. During operation, the linear drive mechanism 41 pushes it radially out of the cabin; during stowage, the linear drive mechanism 41 pulls it radially back into the cabin.

[0044] In some embodiments, annular sealing strips 53 are provided on the inner sides of the upper and lower edges of the second opening 52 of the protective chamber 51; such as Figure 1 As shown, when the protective chamber 51 rises to the protective position, the second opening 52 is perpendicularly offset from the first opening 8, and the annular sealing strip 53 presses against the complete outer wall surface of the lamp post body 1, sealing the first opening 8 inside the protective chamber 51; Figure 2 As shown, when the protective cabin 51 descends to the working position, the second opening 52 is vertically aligned with the first opening 8, forming a through passageway.

[0045] Specifically, the upper and lower inner edges of the second opening 52 are fitted with specially designed annular sealing strips 53, made of hollow EPDM rubber tubing, which are ozone and UV resistant, and can achieve IP66 dust and water resistance under compressed conditions. The protective chamber 51 is slidably connected to the lamp post body 1 via a linear guide rail structure. In operation, the protective chamber 51 descends to its lowest position (descending stroke 500mm). At this time, the second opening 52 is precisely aligned with the first opening 8 in the vertical direction, forming a through passage. The linear drive mechanism 41 extends, pushing the composite acoustic array 42 radially and horizontally out of the passage, fully exposing it to the external environment. The array begins broadcasting. When returning to the protective state after operation, the protective chamber 51 rises to its highest position. At this time, the second opening 52 is completely offset from the first opening 8 (1a) in the vertical direction (offset 500mm). The annular sealing strips 53 on the upper and lower edges of the second opening 52 are tightly pressed against the complete outer wall surface of the lamp post body 1, sealing the first opening 8 inside the protective chamber 51. The linear drive mechanism 41 is in its retracted limit position, and the composite acoustic array 42 is completely retracted into the cabin. In this state, the protective cabin 51 and the lamp post body 1 form a continuous and smooth cylindrical surface, with a sealed cavity inside, providing IP65 protection.

[0046] In some embodiments, such as Figure 10 As shown, the protective chamber 51 is equipped with a temperature control system 11. The temperature control system 11 includes a semiconductor cooling chip 111 (preferably 4 TEC1-12706 chips) attached to the inner wall of the protective chamber 51, an aluminum finned heat sink 112 thermally connected to the semiconductor cooling chip 111, and a DC fan 113 (preferably 2 8025 type axial flow fans) disposed on the heat sink 112.

[0047] Specifically, when the temperature and humidity sensor 114 detects that the cabin environment exceeds the set range, the temperature control system 11 is activated to heat or cool. At least two temperature and humidity sensors 114 are provided, one PT100 platinum resistance thermometer installed at a high position and the other at a low position within the cabin. The sensors are connected to the intelligent control unit 7 via cables, and their data is used to determine whether to activate the thermoelectric cooler 11163 for heating or cooling, and to control the fan speed.

[0048] In this embodiment, the temperature control system 11 operates in a protective state: when the cabin temperature is >40℃, cooling is activated, and when it is <5℃, heating is activated (by switching the direction of the cooling chip current) to maintain the cabin temperature in a comfortable range of 15℃-35℃.

[0049] The temperature control system 11 in this embodiment uses a semiconductor cooling chip 111 attached to the inner wall of the protective cabin 51 as its core actuator. Its advantages are: First, rapid switching between cooling and heating modes (achieved by changing the direction of the current), enabling it to quickly switch from cooling to heating mode based on the real-time temperature monitored by sensors, actively handling a wide temperature range from -30℃ to 55℃. Second, the cooling chip is directly attached to the inner wall, acting directly on the air inside the cabin and nearby equipment through heat conduction, resulting in a short and efficient heat exchange path. Combined with the forced convection cooling module consisting of the aluminum finned heat sink 112 and the DC fan 113, it efficiently dissipates heat from the hot end (during cooling) or cold end (during heating) of the cooling chip to the external environment or introduces it into the cabin, ensuring stable and continuous temperature control performance. This system can stably maintain the operating temperature inside the protective cabin within the optimal operating range of the electronic equipment (e.g., 0℃ to 40℃). Furthermore, the protective cabin 51, combined with this active temperature control system 11, constitutes an intelligent "climate protection fortress." Under scorching sun, it actively draws heat away from the interior, preventing an "oven" effect and protecting speaker diaphragms and electronic components (such as amplifiers and control boards) from high-temperature aging. In frigid, snowy weather, it actively heats itself to prevent condensation from freezing and damaging the equipment, and ensures that components such as batteries maintain their capacity at suitable temperatures. This proactive intervention capability allows the smart light pole of this invention to be deployed in a wider range of geographical and climatic regions, greatly expanding its application scope. At the same time, the stable temperature environment also reduces mechanical stress and connector loosening caused by thermal expansion and contraction inside the equipment, improving overall reliability.

[0050] In some embodiments, such as Figure 11 As shown, the lamp post body 1 is also equipped with an environmental sensor group, which includes a wind speed sensor 12 for monitoring wind speed, a rain sensor 9 for monitoring rainfall, and a microphone array 6 for monitoring environmental noise.

[0051] Specifically, the wind speed sensor 12 is an ultrasonic sensor and is installed on the top of the light pole body 1; the rain sensor 9 is a piezoelectric sensor and is installed on an open bracket on the upper side of the light pole body 1, with the sensor sensing surface facing upwards to ensure accurate collection of precipitation; the microphone array 6 consists of multiple waterproof microphones, which are embedded in the edge of the opening of the protective cabin 51 to collect environmental noise and feed it back to the phased array beamforming algorithm.

[0052] In this embodiment, the switching of the working modes of all core functional modules (active stabilization mechanism 32, composite acoustic array 42, robotic arm, and protective cabin) highly depends on the real-time data of the environmental sensor group. The wind speed sensor 12 provides a quantitative input of wind load that directly affects the stability of the platform and is the only authoritative criterion for switching between electromagnetic levitation mode and hydraulic rigid locking mode, avoiding blind switching based on timing or fixed thresholds. The rain sensor 9 accurately distinguishes between light rain, moderate rain, and heavy rain levels, directly triggering the switching of the acoustic array between traditional speaker mode and vortex ring generator mode, as well as the lifting and lowering decisions of the protective cabin 51, ensuring that the equipment can maintain optimal broadcast performance even under optimal protection. The introduction of the microphone array 6 is a key innovation. It is not only an "ear" for picking up environmental noise, but also a "sensor" for the system to perform real-time feedback optimization of acoustic performance. By analyzing the noise spectrum (especially wind and rain noise characteristics) collected by the microphone array 6, the system can: First, dynamically adjust the beamforming algorithm of the composite acoustic array 42 and the angle of the guide vanes of the adjustable shroud to counteract the sound attenuation and deflection caused by the current wind direction and speed with the optimal sound beam shape. Second, activate and optimize the parameters of the active noise reduction algorithm to specifically suppress strong wind noise or rain noise in specific frequency bands, thereby improving the signal-to-noise ratio of the broadcast signal. Third, when noise cannot be completely suppressed, an intelligent voice enhancement algorithm can be activated to perform real-time compensation processing on the broadcast voice signal, ensuring the clarity of key information frequency bands (such as 1kHz-4kHz).

[0053] In some embodiments, such as Figure 11 As shown, the smart light pole also includes an intelligent control unit 7, which is used to automatically control the system to switch between normal floating broadcast mode, strong wind locking anti-interference mode and severe weather storage protection mode based on the data of the environmental sensor group. Preferably, the intelligent control unit 7 is electrically connected to the energy-saving lighting device 10 and is configured to coordinate the lighting brightness and the power status of the voice broadcasting component based on time period or pedestrian density information.

[0054] In this embodiment, the intelligent control unit 7 serves as the "decision-making hub" between the environmental sensor group and various actuators (stabilization platform, acoustic array, robotic arm, and protective cabin). It processes multi-source sensor data such as wind speed, rainfall, and noise in real time, and automatically and accurately switches between normal suspended broadcasting mode, strong wind-locked anti-interference mode, and severe weather containment protection mode based on preset precise thresholds and algorithm models (rather than simple thresholds). Furthermore, the intelligent control unit 7 achieves deep collaboration between the voice broadcasting system and the pole-side energy-saving lighting equipment 10. The control unit not only controls the broadcasting system according to the environment but also receives information such as time of day and pedestrian density (e.g., through video analysis), and uses this information to perform integrated intelligent scheduling of lighting and broadcasting. For example, during low-traffic periods at night, the control unit can simultaneously instruct the lighting system to enter "moonlight mode" (extremely low brightness) and switch the broadcasting system to "low-power watchdog mode" (microphone array 6 only monitors the environment, amplifier is in standby mode), achieving coordinated minimization of regional energy consumption. When a sudden event is detected or public services need to be enhanced during a specific time period, the control unit can also collaboratively increase lighting brightness, broadcast power, and coverage.

[0055] Specifically, the intelligent control unit 7 is based on the NVIDIA Jetson Xavier NX, runs the Ubuntu Linux system, and has the following core algorithm modules built in: Data fusion and state estimation: Integrate multi-source sensor data such as wind speed, rainfall, temperature, and vibration to comprehensively assess the current environmental risk level; Mode decision and switching control: Automatically switch modes based on preset thresholds; Phased array beamforming: Based on the noise spectrum and crowd density information fed back by microphone array 6, the beam direction and gain are dynamically optimized; Lighting coordination management: Communicates with the controller of energy-saving lighting equipment 10 to achieve coordinated dimming and power adjustment; Fault self-diagnosis and safety protection: Real-time monitoring of the status of each actuator, and automatic switching to safety mode when abnormality occurs.

[0056] The workflow is as follows: Step S1: System power-on and initialization.

[0057] The intelligent control unit 7 starts, each sensor performs a self-test, and each actuator (electromagnet 321, locking cylinder 324, robotic arm, lifting mechanism, temperature control system 11) is reset to the safe default state (such as platform locking, robotic arm retraction, and protective cabin opening).

[0058] Step S2: Real-time acquisition and fusion of environmental data.

[0059] The system continuously collects data such as wind speed, wind direction, rainfall, ambient noise spectrum, and temperature and humidity inside and outside the cabin. The intelligent control unit 7 integrates and analyzes this data, and combines it with time and preset working strategies to form a comprehensive judgment on the current environmental status.

[0060] Step S3: Intelligent decision-making and switching of working modes.

[0061] Based on the environmental condition assessment, the control system automatically switches between three core operating modes: S3.1 Normal Suspended Broadcast Mode (Light Breeze / No Rain / Suitable Temperature): Triggering conditions: wind speed < first threshold (e.g., 8m / s), no rainfall or only drizzle, and cabin temperature within a comfortable range.

[0062] Perform the following actions: 1. The hydraulic locking mechanism is released (wedge block 325 retracts).

[0063] 2. When the electromagnetic levitation module is powered on, the platform plate 33 is stably levitated at a set gap (e.g., 10mm) under the feedback of the displacement sensor 322.

[0064] 3. The protective cabin 51 descends to the fully open position. At this time, the opening on the side of the protective cabin moves down to the area opposite to the opening of the lamp post body 1. Then the linear drive mechanism 41 pushes the composite acoustic array 42 to the preset position, and the phased array performs ±30° electronic scanning broadcast according to the distribution of people.

[0065] 4. Collaborative energy saving: The intelligent control unit 7 adjusts the brightness of the energy-saving lighting equipment 10 to a suitable level according to the time period and the density of people.

[0066] S3.2 Strong Wind Lock-in Anti-interference Mode (Moderate Stroke / Possible Rain): Triggering conditions: First threshold ≤ wind speed < second threshold (e.g., 20m / s), or accompanied by moderate rain.

[0067] Perform the following actions: 1. The power of the electromagnetic levitation module is reduced, and the platform plate 33 falls smoothly to contact the flange of the base shell.

[0068] 2. The locking cylinder 324 is activated, driving the wedge block 325 to wedge into the wedge groove 34 of the platform plate 33, thereby achieving rigid locking.

[0069] 3. The array remains operational, and the phased array algorithm enhances directivity to counteract wind deflection.

[0070] 4. Acoustic system switching algorithm: Enhance beamforming directivity to counteract wind deflection; activate active noise reduction or voice enhancement algorithms based on the wind noise spectrum collected by microphone array 6; increase the output weight of vortex ring generator array 422 when rainfall is heavy.

[0071] 5. The temperature control system 11 determines whether to start based on the cabin temperature.

[0072] S3.3 Severe Weather Storage Protection Mode (Strong Wind / Heavy Rain / Extreme Temperature): Triggering conditions: wind speed ≥ second threshold, or heavy rain / hail, or cabin temperature exceeds safety limit.

[0073] Perform the following actions: 1. The acoustic broadcast content was immediately switched to a concise warning message.

[0074] 2. The linear drive mechanism 41 quickly retracts the array.

[0075] 3. The lifting mechanism of the protective cabin 51 is activated, which quickly raises the cabin and moves the opening to a position above the lamp post body 1. Due to the design of the sealing strip, it is completely closed and forms a seal with the lamp post body 1.

[0076] 4. Platform interface layer 3 remains locked.

[0077] 5. The temperature control system 11 is activated to quickly adjust and maintain the cabin temperature within a safe range (e.g., 10℃-35℃).

[0078] At this time, the voice broadcast function can be switched to the built-in emergency speaker (IP68 rating) at the bottom of the light pole for minimum broadcasting, and the lighting equipment can be kept on to provide emergency lighting, with the power appropriately increased.

[0079] Step S4: Continuous monitoring and adaptive fine-tuning.

[0080] In any mode, the system continuously monitors environmental parameters and equipment status (such as platform vibration and cabin temperature). In normal and strong wind modes, it dynamically adjusts the robotic arm's direction and the angle of the guide vanes based on subtle changes in wind direction and the movement of people, achieving "dynamic tracking" of the sound beam. At the same time, it optimizes broadcast signal processing parameters in real time based on noise changes.

[0081] Step S5: Exception handling and fault safety.

[0082] When a sensor malfunction, actuator abnormality, or communication interruption is detected, the system will immediately enter a predefined fault-safe mode (usually "shelter protection mode" or "locked standby mode") to ensure equipment safety and report the fault information through the communication module.

[0083] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0084] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0085] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0086] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A smart light pole equipped with a voice broadcasting device, characterized in that, The light pole includes a light pole body (1) and an energy-saving lighting device (10) and a voice broadcasting component mounted thereon. The light pole body (1) has a vertically layered stable structure inside, including: The damping connection layer (2) is fixed inside the lamp post body (1) and is used to dissipate and isolate the vibration of the lamp post body (1). It includes a central connecting plate (21) and a plurality of composite damping connecting rods (22) connected between the central connecting plate (21) and the inner wall of the lamp post body (1). The platform interface layer (3) is connected above the damping connection layer (2) and includes a platform base housing (31) and a platform plate (33). The platform base housing (31) is connected to the central connecting disk (21) by a ball joint, and has an active stabilizing mechanism (32) inside that enables the platform plate (33) to switch between a suspended state and a rigid locking state. The execution layer (4) is installed on the platform plate (33) and includes a linear drive mechanism (41) and a composite acoustic array (42). The driving direction of the linear drive mechanism (41) is consistent with the radial direction of the lamp post body (1). The composite acoustic array (42) is fixed in a vertical position at the output end of the linear drive mechanism (41) and its sound emission direction is perpendicular to the axis of the lamp post body (1). The environmental adaptation layer (5) includes a protective cabin (51) that can be raised and lowered and fitted onto the outside of the lamp post body (1). The lamp post body (1) has a first opening (8) on its side wall and the protective cabin (51) has a second opening (52) on its side wall. The protective cabin (51) moves up and down to make the second opening (52) aligned or offset from the first opening (8) in the vertical direction, thereby opening or closing the access channel of the composite acoustic array (42).

2. The smart light pole equipped with a voice broadcasting device as described in claim 1, characterized in that, The composite damping link (22) includes an outer cylinder (221), an inner rod (222), a hydraulic damping unit (223), and a butterfly spring assembly (224). One end of the inner rod (222) is hinged to the central connecting plate (21), and the other end extends into the outer cylinder (221) and slides therewith. The hydraulic damping unit (223) is fixed to the end of the inner wall of the outer cylinder (221), and its piston rod is connected to the end of the inner rod (222). The butterfly spring assembly (224) is installed in the annular groove of the inner wall of the outer cylinder (221) and contacts the shoulder of the inner rod (222) through the pressure transmission plate (226).

3. The smart light pole equipped with a voice broadcasting device as described in claim 2, characterized in that, The composite damping link (22) also includes a limiting rubber block (225), which is disposed on the inner end face of the outer cylinder (221) and is used to provide buffering and hard limiting when the inner rod (222) retracts.

4. The smart light pole equipped with a voice broadcasting device as described in claim 3, characterized in that, The active stabilization mechanism (32) includes an electromagnetic levitation module and a hydraulic locking mechanism disposed within the platform base housing (31); the electromagnetic levitation module includes four sets of electromagnets (321) disposed at the bottom of the platform base housing (31) and arranged in a square, displacement sensors (322) disposed corresponding to the electromagnets (321), and auxiliary springs (323) arranged around the electromagnets (321); the hydraulic locking mechanism includes two sets of locking cylinders (324) symmetrically disposed on the upper side wall of the platform base housing (31) and a wedge block (325) driven by the locking cylinders (324) and capable of horizontal movement; the edge of the platform plate (33) is provided with a wedge groove (34) that cooperates with the wedge block (325).

5. The smart light pole equipped with a voice broadcasting device as described in claim 4, characterized in that, The linear drive mechanism (41) is a linear module or a multi-stage telescopic arm. Its fixed end is mounted on the upper surface of the platform plate (33) by a bracket, and its moving end extends outward along the radial direction of the lamp post body (1). The composite acoustic array (42) is fixed to the end of the moving end.

6. The smart light pole equipped with a voice broadcasting device as described in claim 5, characterized in that, The composite acoustic array (42) includes a main loudspeaker array (421) and an auxiliary vortex generator array (422); the loudspeaker units of the main loudspeaker array (421) are arranged vertically, and the sound emission direction of all loudspeaker units and the sound emission direction of the vortex generator array (422) are all horizontally pointing towards the direction of the first opening (8); the composite acoustic array (42) has phased array beamforming capability and can adjust the beam direction in the horizontal plane by electronic scanning.

7. The smart light pole equipped with a voice broadcasting device as described in claim 6, characterized in that, The upper and lower edges of the second opening (52) of the protective cabin (51) are provided with annular sealing strips (53); when the protective cabin (51) rises to the protective position, the second opening (52) is vertically offset from the first opening (8), and the annular sealing strip (53) is pressed against the complete outer wall surface of the lamp post body (1), sealing the first opening (8) inside the protective cabin (51); when the protective cabin (51) descends to the working position, the second opening (52) is vertically aligned with the first opening (8), forming a through passage.

8. The smart light pole equipped with a voice broadcasting device as described in claim 7, characterized in that, The protective cabin (51) is equipped with a temperature control system (11), which includes a semiconductor cooling chip (111) attached to the inner wall of the protective cabin (51), an aluminum fin heat sink (112) thermally connected to the semiconductor cooling chip (111), and a DC fan (113) disposed on the heat sink (112).

9. The smart light pole equipped with a voice broadcasting device as described in claim 8, characterized in that, The lamp post body (1) is also equipped with an environmental sensor group, which includes a wind speed sensor (12) for monitoring wind speed, a rain sensor (9) for monitoring rainfall, and a microphone array (6) for monitoring environmental noise.

10. The smart light pole equipped with a voice broadcasting device as described in claim 9, characterized in that, The smart light pole also includes an intelligent control unit (7) for automatically controlling the system to switch between normal floating broadcast mode, strong wind locking anti-interference mode and severe weather storage protection mode based on data from the environmental sensor group; Preferably, the intelligent control unit (7) is electrically connected to the energy-saving lighting device (10) and is configured to coordinate the lighting brightness with the power status of the voice broadcasting component based on time period or crowd density information.

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