Three power supply sound and light selection control circuit of construction warning board and construction warning board

Abstract

The utility model provides a kind of three power supply sound-light selection control circuit of construction warning board, comprising: controller, according to external environmental information, sends selection instruction to sound-light control circuit;External power module is used to provide power supply for battery and controller under unstable condition of solar power supply;Solar power supply module is used to preferentially power supply for controller;Battery module is used to power supply for controller under the condition of unable to realize external power or / and no solar power supply;Photosensitive module is used to detect ambient light intensity;Switch selection module is used to adjust the operating state of sound amplification output module and lamp group module;Sound amplification output module is used to provide warning voice;Lamp group module is used to provide warning light;The utility model constructs the power supply system of external power supply, solar cell and battery trinity, breaks through the limitation of single power supply mode, completely solves the power supply stability problem of traditional product, ensures that it can maintain stable work under any condition.

Description

Technical Field

[0001] This utility model relates to the fields of outdoor road and building construction warning signs and warning light wires, and in particular to a three-power supply sound and light selection control circuit for construction warning signs and a construction warning sign. Background Technology

[0002] Safety warning signs are crucial for ensuring on-site safety, especially in hazardous areas and at main entrances, where prominent warning devices must be installed. Currently, most construction warning signs on the market are powered by solar energy. While this offers energy-saving advantages, it has revealed numerous problems in practical applications, severely impacting the effectiveness of construction safety warnings.

[0003] First, power supply stability is a significant issue. During prolonged periods of cloudy or rainy weather, or in situations with insufficient sunlight, the solar panels cannot charge effectively, causing the warning lights to malfunction at night and creating a safety hazard. Second, the functional design lacks a day / night differentiation mechanism. Most products either only have a single audible warning function or lack both audible and visual alarms, resulting in the contradictory situation of audible warnings disturbing residents during the day, while failing to function at night when strong light warnings are needed due to insufficient power. While existing foldable emergency warning lights on the market are equipped with batteries and USB charging capabilities, they lack a coordinated working mechanism between solar charging and external power sources, preventing truly uninterrupted 24 / 7 operation. From a technical perspective, the core problem with existing products lies in their simplistic power supply system design and basic control logic. While portable, rechargeable audible and visual alarms exist on the market, supporting both light and sound / light control, their power supply remains limited to battery charging, lacking options for external power sources and effective integration with solar charging. Furthermore, while patented energy-saving construction warning signs utilize photovoltaic power generation and battery storage, they explicitly exclude external power interfaces, making continuous operation unreliable in prolonged periods without sunlight. In terms of control logic, although traditional sound and light controlled automatic switches can achieve the basic function of turning off the lights during the day and turning on the lights at night, this design is mainly aimed at indoor lighting scenarios and cannot meet the all-weather warning needs of complex construction site environments. Furthermore, it lacks a professional sound and light switching strategy for construction scenarios. Utility Model Content

[0004] To address the aforementioned issues, this utility model provides a three-power supply sound and light selection control circuit for construction warning signs and a construction warning sign itself. This device effectively solves the technical defects of existing products through innovative power supply modes and intelligent control methods. A three-power supply sound and light selection control circuit for a construction warning sign includes: The controller sends selection commands to the sound and light control circuit based on external environmental information; An external power module is used to provide power to the battery and controller when solar power supply is unstable; A solar power module is used to prioritize powering the controller; Battery module for powering the controller in situations where an external power source is unavailable or / and solar power is unavailable; The photosensitive module is used to detect the intensity of ambient light. The switch selection module is used to adjust the operating status of the sound amplification output module and the lamp module; A sound amplification output module is used to provide warning voice messages; The light module is used to provide warning lights; Preferably, the control circuit further includes: Diode No. 1 is placed between the external power supply module and the solar power supply module, and its conduction characteristics are used to control whether the external power supply module is connected to the controller. Diode number two is placed between the battery module and the controller, and its conduction characteristics are used to control whether the battery module is connected to the controller. Diode No. 3; placed between the external power supply module, the solar power supply module and the controller, and connected in parallel with the battery module.

[0005] Preferably, the control circuit further includes a power supply switch, which is located between the external power supply module, the solar power supply module, the battery module and the controller.

[0006] Preferably, both the power supply switch and the switch selection module are self-resetting tactile switches.

[0007] Preferably, the switch selection module includes a brightness and flashing frequency control switch for the lamp module, a volume and interval control switch for the sound amplification output module, and a combination control switch for the lamp module and the sound amplification output module.

[0008] Preferably, the sound amplification output module receives a PWM wave sent by the controller, which is filtered by a low-pass filter to generate different analog voltage values ​​based on the different pulse widths of the PWM wave. After passing through an amplifier, the analog voltage values ​​are output to the passive speaker.

[0009] Preferably, the photosensitive module is a photoresistor.

[0010] This utility model also discloses a construction warning sign, which includes the circuit described above.

[0011] The beneficial effects of this utility model are as follows: 1. This utility model constructs a three-in-one power supply system consisting of an external power source, a solar cell, and a storage battery, breaking through the limitations of a single power supply mode and completely solving the power supply stability problem of traditional products, ensuring stable operation under any circumstances.

[0012] 2. The system has a day / night differentiation function and is designed with an intelligent switching control circuit. This control circuit uses a light sensor as its core to automatically determine the day / night status by detecting the ambient light intensity and switch the corresponding warning mode accordingly. It also automatically selects the optimal power supply method based on the external environmental conditions, which not only ensures the warning effect but also effectively solves the problem of noise disturbance during the day. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 Block diagram of the three-power supply sound and light selection control circuit module; Figure 2 Schematic diagram of a three-power supply acoustic-optical selection control circuit; Figure 3 Schematic diagram of the construction warning sign Figure 1 ; Figure 4 Schematic diagram of the construction warning sign Figure 2 ; Figure 5 Schematic diagram of the construction warning sign Figure 3 . Detailed Implementation

[0014] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0015] Unless otherwise defined, 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 invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0016] To address the specific needs of construction scenarios, this invention designs a sound and light selection control circuit with day and night differentiation capabilities, ensuring both effective warning and solving the problem of noise disturbance during the day. This control circuit uses a light sensor as its core, automatically determining the day / night state by detecting ambient light intensity and switching the corresponding warning mode accordingly. Under sufficient daylight, the system automatically activates the audible warning mode. Based on modern management principles, the audible alarm emits a continuous warning sound to alert pedestrians and vehicles to the construction area. This design complies with the safety regulations for construction sites, which require the installation of safety warning signs at key construction sites, hazardous areas, and main access points. When the light sensor detects that the ambient light intensity has decreased to a set threshold (such as at dusk or night), the system automatically shuts off the audible alert and switches to a light alert mode. The light alert uses a high-brightness LED light source, and a special optical focusing structure makes the light emission more uniform and efficient. The light mode can be selected as either constant or flashing, providing a clear and conspicuous visual warning in nighttime environments. This intelligent switching mechanism perfectly meets the different needs of construction sites during the day and night: during the day, when the environment is noisy, the sound warning has strong penetration and significant effect; at night, when the environment is quiet, the sound is turned off to avoid disturbing residents, and a more visually appealing light warning is used instead. At the same time, the system also features a manual switching button, allowing on-site staff to manually select the warning mode according to the actual situation, improving the flexibility and applicability of the equipment. This utility model's construction warning three-power supply sound and light selection control circuit device demonstrates multiple advantages in practical applications, possessing significant practical value and market prospects. From a safety perspective, the device meets the requirements of the "General Standard for Safety, Hygiene and Occupational Health at Construction Sites in Buildings and Municipal Engineering" regarding sufficient lighting for nighttime construction. Through a stable and reliable power supply system and intelligent warning modes, it ensures all-weather safety warning effects in the construction area. In terms of economics, the three-power supply system design achieves optimized energy allocation. An external power source ensures basic power supply, solar charging provides energy-saving supplements, and a storage battery serves as an emergency backup. The coordinated operation of these three systems reduces energy consumption and dependence on the power grid. Compared to traditional single-solar-power products, although the initial cost is slightly higher, long-term use significantly reduces maintenance costs and replacement frequency, resulting in better overall life-cycle economics. like Figure 1-2 As shown, this utility model discloses a three-power supply sound and light selection control circuit for construction warning signs. The three power supplies are external power supply VIN, solar panel, and battery VBAT.

[0017] The first scenario: When there is sufficient solar energy, prioritize power supply from solar panels.

[0018] The second scenario: If solar energy is insufficient in the dark or in the absence of solar energy, then an external power source (VIN) should be selected for power supply.

[0019] The third scenario: If there is a power outage and no external power source (VIN) or solar energy is available, the external power source (VIN) and solar panels will not be able to supply power. In this case, the battery (VBAT) will be automatically selected for power supply.

[0020] External power supply VIN, solar panel, and battery VBAT supply power to controller U3 via power switch SW3. Power switch SW3 can be turned on or off to power controller U3. If power switch SW3 is turned on, controller U3 enters operating mode. If the photosensitive resistor detects a nighttime reading, the sound amplification output module is turned off, and the LED light module is turned on. If sufficient light is detected, controller U3 turns off the LED light module and turns on the sound amplification output module. The switch selection module allows selection of not only the brightness or flashing mode of the LED light module, but also the volume of the sound amplification output module, the voice warning interval, and the built-in voice warning content.

[0021] like Figure 2 The schematic diagram of a construction warning three-power supply sound and light selection control circuit device is shown below: VIN represents Figure 1 The external power supply input is as follows: The solar panel's power supply is VCC. Due to the diode's conduction characteristic, if the solar panel is supplying power, VCC will have a low level, and diode D3 will not conduct. If the solar panel cannot supply power, the voltage difference across diode D3 will be reached, and the external power supply VIN will enter, selecting the external power source. Due to the voltage difference conduction characteristic of diode D2, if VOUT is detected as having power, diode D2 will not conduct. Furthermore, the unidirectional conduction characteristic of diode D2 prevents interference and overcharging of the battery VBAT by the external power supply or solar panel. If there is no external power supply VIN and no solar panel power, VCC will be 0, and the P_MOS transistor will conduct at a low level, causing the battery VBAT to output VOUT to power the external module. The power switch SW3 is a tactile push-button switch. The controller U3 is a low-power STM8L051F3P6TR microcontroller. Figure 1 The switch selection module includes Figure 2SW1, SW2, and SW4 are all self-resetting tactile switches. A long press on SW1 allows for real-time adjustment of the LED light module's brightness, while a single click selects the flashing mode, including no flashing, slow flashing, and fast flashing. SW2 allows for adjusting the volume of the sound amplification output module; a long press adjusts the volume in real-time, and a single click adjusts the duration of the voice alarm, with an interval of 0-300 seconds, adjusting the frequency of the warning messages to pedestrians based on different situations and environments. SW4 allows for selecting the combination of the LED light module and the sound amplification output module. A single click selects different modes, such as continuous voice and light output, normal voice and light operation, or turning off the voice or light, allowing for different combinations to be selected based on the environment. A long press changes the voice prompt content. The sound amplification output module I receives a PWM wave from controller U3, which passes through a low-pass filter composed of resistors and capacitors R9, R10, C4, and C5. Different analog voltage values ​​are generated based on the PWM pulse width, and then the signal is amplified by amplifier U4.1LM358 and output to the passive speaker.

[0022] This power supply system uses a 30W battery as the core energy storage unit, paired with low-power peripherals. Specific equipment parameters and independent power supply duration are as follows: LED Lighting Assembly: It adopts a low-power LED diode with a power consumption of only 0.06W per LED. If the lighting assembly is powered independently, it can provide a long-term power supply of about 450 hours based on the total power of the battery and the power consumption of the equipment, which can meet the basic lighting needs at night for a long time. Moreover, the power consumption is extremely low, which can save battery power consumption to the greatest extent.

[0023] Voice speaker: A 1W low-power large voice speaker is used, which can support approximately 24 hours of continuous power supply in scenarios where only voice output is required. This speaker effectively controls power consumption while ensuring voice clarity and range, thus balancing functional requirements and battery life. Figure 3-5 The overall form of the construction warning sign is presented from three different perspectives. Figure 3 The side of the warning sign allows for a direct observation of the device's side layout and the installation position of each module in the side direction; Figure 4 The front of the warning sign is the main display surface for the main functional components, such as display and operation-related modules, which are mostly located here. Figure 5 The overall 3D model of the warning sign clearly shows the three-dimensional structure of the device, the spatial arrangement of each component, and the overall shape. The switch selection module is fixedly installed on the lower front of the warning sign. Users can operate the switch on this module to switch and select the device's sound volume and audio-visual warning mode, making it a key component for controlling the device's functions. A through-hole is also located on the lower front of the warning sign for the sound amplification output module. The warning sound generated by the sound amplification output module is propagated outwards through this through-hole. The through-hole design must balance sound propagation efficiency and device protection performance, ensuring that the warning sound is clear and loud, covering the required area for construction warnings, while preventing dust, rainwater, and other impurities from entering the module and affecting its normal operation. A light source receiving area for a photosensitive resistor is also located on the lower front of the warning sign. This area is crucial for the photosensitive resistor to sense changes in external light. It can detect the ambient light intensity in real time and convert the light signal into an electrical signal, transmitting it to the device's control system. This provides the basis for the device to automatically adjust the brightness of the LED lights, ensuring optimal warning effects under different lighting conditions (such as daytime, nighttime, and cloudy days).

[0024] The large screen in front of the warning sign is an LED light display module (display panel, with the lights inside the panel). The display panel serves as the external carrier for the LED lights, protecting them and displaying warning signals. The internal LED lights can emit different colors (such as red and yellow) and different modes (such as constant light and flashing light) according to control commands, conveying clear construction warning information through the display panel to remind pedestrians and vehicles to pay attention to safety. An external power supply module is also installed below the front of the warning sign. When solar power is insufficient or a continuous and stable power supply is required in special circumstances, an external power source can be connected through this interface to provide reliable power support for the device, ensuring its normal operation under various working conditions. The solar panel is installed directly above the warning sign. Its main function is to convert solar energy into electricity and store it in the device's energy storage components, providing clean and sustainable power. The installation location of this module must fully consider the lighting conditions to maximize solar energy utilization and meet the green energy needs of outdoor construction environments. The stabilizing bracket is the supporting foundation of the device, used to fix the entire device in a suitable location on the construction site. Its design must have sufficient strength and stability to withstand the effects of outdoor wind, vibration, and other factors, ensuring that the device maintains a stable installation state during construction, without tilting or falling over, thus effectively fulfilling its warning function.

[0025] (a) Daytime solar power supply scenario During the day, under sunlight conditions, the system prioritizes solar power, at which point the battery is essentially ineffective, and all equipment power consumption is directly borne by the solar system. The speaker can work normally as needed without relying on battery power, thus avoiding power consumption caused by using the battery during the day. LED lights are usually off during the day due to ample natural light, further reducing total daytime power consumption and ensuring that the solar system can efficiently store energy for nighttime power supply. If auxiliary lighting is needed during the day, it can also be powered directly by solar energy without affecting battery life. (ii) Nighttime power supply scenario When there is no solar power input at night, the system switches to battery power mode and adopts an optimized strategy of "disabling voice and powering only the lights": it only powers the LED light group. Combined with the 450 hours of independent power supply time mentioned earlier, the battery can maintain a sufficient charge even if used for several consecutive nights without frequent charging. Disabling the voice function at night not only meets the need for voice reminders in most scenarios at night, but also maximizes the overall battery life. (III) Emergency scenarios without solar power or external power supply Even in extreme situations where there is no solar power or external power supply, the system still has reliable emergency power supply capabilities: if the voice output function needs to be enabled, the battery can support two days of continuous voice reminders to meet the information transmission needs in emergency scenarios; if the voice output strategy is further optimized, by "increasing the frequency of voice playback intervals", such as adjusting the reminder from once every 1 second to once every 5 minutes, the power consumption per unit time can be significantly reduced, and the voice prompt time can be further extended. The specific extension time can be flexibly calculated according to the adjustment range of the interval frequency to best adapt to the needs of different emergency scenarios. Summary of the core advantages of the solution: Low power consumption adaptability: Both the LED light assembly (0.06W) and the speaker (1W) are low power consumption devices, reducing the total power consumption from the source, and achieving long-lasting battery life in conjunction with the 30W battery; Scenario-based power supply optimization: Differentiate between daytime (solar power supply), nighttime (lighting power supply only), and emergency (adjusting voice frequency) scenarios, and formulate targeted power supply strategies to improve power utilization efficiency; High emergency reliability: Basic functions are guaranteed even without external power, and the battery life of critical functions (voice alerts) can be further extended through parameter adjustments to meet emergency needs. This circuit uses fewer chips, resulting in lower cost. It can achieve various audio-visual combinations in different scenarios. The three-power supply audio-visual selection control circuit effectively solves the shortcomings of existing products in terms of power supply stability and warning applicability through innovative technical solutions, providing more reliable and intelligent technical support for construction safety management, and has broad application value.

[0026] Compared with existing technologies, the innovations of this utility model are reflected in three aspects: First, the collaborative working mechanism of the three power supply systems breaks through the limitations of the traditional single power supply mode; second, the intelligent sound and light switching strategy based on light sensing achieves accurate matching of different warning needs during the day and night; and third, the professional construction scenario adaptation design has been comprehensively optimized in terms of power supply reliability, warning effectiveness and environmental adaptability. In summary, the construction warning three-power supply sound and light selection control circuit device, through innovative technical solutions, effectively solves the shortcomings of existing products in terms of power supply stability and warning applicability, providing a more reliable and intelligent technical guarantee for construction safety management, and has broad application value. Although the present invention has been described in detail with reference to the accompanying drawings and preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made to the embodiments of the present invention by those skilled in the art without departing from the spirit and essence of the present invention, and such modifications or substitutions should all be within the scope of the present invention. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should also be included within the protection scope of the present invention.

Claims

1. A three power supply sound and light selection control circuit for construction warning board, characterized in that, include: The controller sends selection commands to the sound and light control circuit based on external environmental information; An external power module is used to provide power to the battery and controller when solar power supply is unstable; A solar power module is used to prioritize powering the controller; Battery module for powering the controller in situations where an external power source is unavailable or / and solar power is unavailable; The photosensitive module is used to detect the intensity of ambient light. The switch selection module is used to adjust the operating status of the sound amplification output module and the lamp module; A sound amplification output module is used to provide warning voice messages; The light module is used to provide warning lights.

2. The three power supply sound and light selection control circuit of a construction warning board according to claim 1, characterized in that, The control circuit also includes: Diode No. 1 is placed between the external power supply module and the solar power supply module, and its conduction characteristics are used to control whether the external power supply module is connected to the controller. Diode number two is placed between the battery module and the controller, and its conduction characteristics are used to control whether the battery module is connected to the controller. Diode No. 3; placed between the external power supply module, the solar power supply module and the controller, and connected in parallel with the battery module.

3. The three power supply sound and light selection control circuit of a construction warning board according to claim 1, characterized in that, The control circuit also includes a power supply switch, which is located between the external power supply module, the solar power supply module, the battery module and the controller.

4. The three power supply sound and light selection control circuit of a construction warning board according to claim 3, characterized in that, Both the power supply switch and the switch selection module are self-resetting tactile switches.

5. The three-power supply sound and light selection control circuit for a construction warning sign according to claim 1, characterized in that, The switch selection module includes a brightness and flashing frequency control switch for the lamp module, a volume and interval control switch for the sound amplification output module, and a combination control switch for the lamp module and the sound amplification output module.

6. The three power supply sound and light selection control circuit of a construction warning board according to claim 1, characterized in that, The sound amplification output module receives a PWM wave sent by the controller, which is filtered by a low-pass filter to generate different analog voltage values ​​based on the different pulse widths of the PWM wave. After passing through the amplifier, the analog voltage values ​​are output to the passive speaker.

7. The three power supply sound and light selection control circuit of a construction warning board according to claim 1, characterized in that, The photosensitive module is a photoresistor.

8. A construction warning sign, characterized in that The construction warning sign includes the three-power supply sound and light selection control circuit as described in any one of claims 1 to 7.

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