Intelligent zebra crossing passing synchronization warning system

Abstract

This utility model discloses a smart zebra crossing synchronized warning system, including traffic lights, curb stones, a signal synchronization controller, and a power supply module. The traffic lights output red, yellow, and green status signals and are used to control pedestrians crossing the zebra crossing. The curb stones have built-in LED light strips that output red, yellow, and green status signals and are installed near the zebra crossing. The signal synchronization controller includes a signal decoding circuit and a driving circuit. The signal decoding circuit reads and decodes the traffic light status via the I2C protocol, and the driving circuit outputs a PWM signal of the corresponding color to the LED light strip based on the decoding result. This utility model has the following advantages and effects: the synchronized control of the traffic lights and the built-in LED light strips on the curb stones can construct an aerial + ground-based three-dimensional warning network, significantly improving pedestrian recognition efficiency of traffic lights and reducing the accident rate.

Description

Technical Field

[0001] This utility model relates to the field of smart city technology, and in particular to a smart zebra crossing synchronous warning system. Background Technology

[0002] Traffic lights at both ends of zebra crossings are primarily used to control pedestrians crossing the road, ensuring orderly passage for both pedestrians and vehicles, and improving road safety and traffic efficiency. Traditional traffic light systems rely solely on vertically mounted signal lights for one-way visual warnings, resulting in significant blind spots. When pedestrians are looking down at their phones or are distracted, especially in crowded areas or when large vehicles are passing by, the signal lights are easily overlooked or obstructed, and pedestrian accidents are directly related to pedestrians not paying attention to the traffic light signals. Furthermore, at night when visibility is low, the recognition efficiency of fixed-location traffic lights decreases significantly, and traditional systems lack auxiliary warning methods such as ground lighting. Utility Model Content

[0003] The purpose of this invention is to provide a smart zebra crossing synchronized warning system.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a smart zebra crossing synchronized warning system, including traffic lights, curb stones, a signal synchronization controller, and a power supply module; the traffic lights output red, yellow, and green status signals, and are used to control pedestrians crossing the zebra crossing; the curb stones have built-in LED light strips, which output red, yellow, and green status signals, and are installed near the zebra crossing; the signal synchronization controller includes a signal decoding circuit and a driving circuit, the signal decoding circuit reads and decodes the traffic light status via the I2C protocol, and the driving circuit outputs a PWM signal of the corresponding color to the LED light strip according to the decoding result; the power supply module supplies power to the traffic lights and the light strip modules of the curb stones.

[0005] By adopting the above technical solution, the zebra crossing synchronous warning system is used near zebra crossings to control pedestrians crossing the zebra crossing. The synchronous control of traffic lights and curb stones with built-in LED light strips can build an air + ground three-dimensional warning network, which significantly improves the pedestrians' recognition efficiency of traffic lights and reduces the accident rate. At the same time, the signal decoding circuit reads and decodes the traffic light status through the I2C protocol, ensuring that the traffic signal and curb stone status are synchronized at the millisecond level, avoiding the delay problem of traditional wireless transmission.

[0006] A further feature of this invention is that a light-transmitting groove is provided on the front side of the curbstone, a transparent lamp tube communicating with the light-transmitting groove is provided inside the curbstone, and the LED light strip is located inside the transparent lamp tube.

[0007] By adopting the above technical solution, the transparent light tube can protect the LED light strip, achieving the function of rain and sun protection. At the same time, the setting of the light-transmitting groove on the front side of the curb creates a darker area where the light cannot fully reach, which can improve the visibility of the LED light strip when it is emitting light.

[0008] A further feature of this invention is that the driving circuit outputs a 12VDC, 20mA PWM signal with a duty cycle adjustment range of 10%-90%.

[0009] By adopting the above technical solution, the PWM signal duty cycle can be adjusted from 10% to 90%, which allows the LED strip to maintain high color rendering (Ra>90) while reducing power consumption compared to constant current drive; the 12VDC low-voltage drive avoids overvoltage damage to the LED chip, and the duty cycle adjustment can extend the life of the strip.

[0010] A further feature of this invention is that it includes an ambient light sensing unit that automatically adjusts the brightness of the LED light strip according to the ambient light intensity. The ambient light sensing unit uses a BH1750 light intensity sensor.

[0011] By adopting the above technical solutions, the BH1750 sensor achieves light intensity detection at the 0.01 lux level, and with the adaptive algorithm, the system maintains optimal visibility under both strong midday light and weak midnight light conditions; at the same time, automatic brightness adjustment reduces daily energy consumption.

[0012] A further feature of this invention is that the power supply module includes a city power grid and a UPS backup power supply. The UPS backup power supply uses a lithium battery pack with a capacity of ≥2000mAh and a long working time, and a switching response time of ≤10ms. When the voltage of the city power grid is lower than 180V, the UPS backup power supply is automatically switched.

[0013] By adopting the above technical solutions, the switching response time is ≤10ms, ensuring that the LED light strip is flicker-free. The dual power supply design can continue to work when the urban power grid voltage drops to 180V, meeting the needs of emergency lighting. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Attached reference numerals: 1. Traffic signal light; 2. Curbstone; 21. Light-transmitting groove; 22. Transparent light tube; 23. LED light strip. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings.

[0017] Example: A smart zebra crossing synchronized warning system, such as Figure 1As shown, it includes traffic lights 1, curb stones 2, signal synchronization controllers, and power supply modules.

[0018] like Figure 1 As shown, traffic light 1 outputs red, yellow, and green status signals. Traffic light 1 is used to control pedestrians crossing the zebra crossing. Traffic light 1 has its own control motherboard.

[0019] like Figure 1 As shown, the curbstone 2 has a built-in LED light strip 23, which outputs red, yellow, and green status signals. The curbstone 2 is used for installation near zebra crossings. A light-transmitting groove 21 is provided on the front side of the curbstone 2, and a transparent light tube 22 communicating with the light-transmitting groove 21 is installed inside the curbstone 2. The LED light strip 23 is located inside the transparent light tube 22. The LED light strip 23 is automatically controlled by the main board.

[0020] like Figure 1 As shown, the signal synchronization controller includes a signal decoding circuit and a drive circuit. The signal decoding circuit reads and decodes the traffic light status 1 via the I2C protocol. The drive circuit outputs a PWM signal of the corresponding color to the LED light strip 23 based on the decoding result. The drive circuit outputs a 12VDC, 20mA PWM signal with a duty cycle adjustment range of 10%-90%. The signal synchronization controller uses an STM32F103 microcontroller as the main control chip.

[0021] like Figure 1 As shown, it also includes an ambient light sensing unit, which automatically adjusts the brightness of the LED light strip 23 according to the ambient light intensity. The ambient light sensing unit uses a BH1750 light intensity sensor.

[0022] like Figure 1 As shown, the power supply module includes the city power grid and a UPS backup power supply. The UPS backup power supply uses a lithium battery pack with a capacity of ≥2000mAh and a long working time. The switching response time is ≤10ms. When the voltage of the city power grid is lower than 180V, the UPS backup power supply is automatically switched.

[0023] Implementation Results: This zebra crossing synchronized warning system is used near zebra crossings to control pedestrian crossings. The synchronized control of the traffic light 1 and the curb 2 with the built-in LED light strip 23 can construct an air + ground three-dimensional warning network, significantly improving the pedestrian recognition efficiency of the traffic light 1 and reducing the accident rate. At the same time, the signal decoding circuit reads and decodes the status of the traffic light 1 through the I2C protocol, ensuring that the traffic signal and the curb 2 status are synchronized at the millisecond level, avoiding the delay problem of traditional wireless transmission.

[0024] The transparent tube 22 protects the LED strip 23 from rain and sun. The light-transmitting groove 21, located in front of the curbstone 2, creates a darker area where light cannot reach all areas, improving the visibility of the LED strip 23 when illuminated. The PWM signal duty cycle, adjustable from 10% to 90%, allows the LED strip 23 to maintain high color rendering (Ra>90) while reducing power consumption compared to constant current drives. The 12VDC low-voltage drive prevents overvoltage damage to the LED chips, and the duty cycle adjustment extends the lifespan of the strip 23. The BH1750 sensor achieves 0.01 lux level light intensity detection, and the adaptive algorithm ensures optimal visibility under both strong midday light and weak midnight light conditions. Automatic brightness adjustment also reduces daily energy consumption. A switching response time of ≤10ms ensures flicker-free LED strip 23. The dual-power supply design allows for continuous operation even when the city power grid voltage drops to 180V, meeting emergency lighting needs.

[0025] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A smart zebra crossing passing synchronization warning system, characterized in that: Includes traffic lights (1), curb stones (2), signal synchronization controllers, and power supply modules; The traffic light (1) outputs red, yellow and green status signals, and the traffic light (1) is used to control pedestrians crossing the zebra crossing; The curbstone (2) has a built-in LED light strip (23), which outputs red, yellow and green status signals. The curbstone (2) is used to be installed near the zebra crossing. The signal synchronization controller includes a signal decoding circuit and a driving circuit. The signal decoding circuit reads the traffic light (1) status through the I2C protocol and performs decoding. The driving circuit outputs a PWM signal of the corresponding color to the LED light strip (23) according to the decoding result. The power supply module provides power to the light strip (23) modules of the traffic signal light (1) and the curbstone (2). 2.The intelligent zebra crossing passing synchronization warning system according to claim 1, characterized in that: A light-transmitting groove (21) is provided on the front side of the curbstone (2), and a transparent lamp tube (22) communicating with the light-transmitting groove (21) is provided inside the curbstone (2), and the LED light strip (23) is located inside the transparent lamp tube (22). 3.The intelligent zebra crossing passing synchronization warning system according to claim 1, characterized in that: The drive circuit outputs a 12VDC, 20mA PWM signal with a duty cycle adjustment range of 10%-90%.

4. The intelligent zebra crossing passing synchronization warning system according to claim 1, characterized in that: It also includes an ambient light sensing unit that automatically adjusts the brightness of the LED light strip (23) according to the ambient light intensity. The ambient light sensing unit uses a BH1750 light intensity sensor.

5. The intelligent zebra crossing passing synchronization warning system according to claim 1, characterized in that: The power supply module includes the urban power grid and a UPS backup power supply. The UPS backup power supply uses a lithium battery pack with a capacity of ≥2000mAh and a long working time. The switching response time is ≤10ms. When the voltage of the urban power grid is lower than 180V, the UPS backup power supply is automatically switched.

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