A road profile warning induction lamp and system with breathing flashing mode

Abstract

This utility model relates to the field of road traffic safety technology, specifically to a road contour warning and guidance light and system with a breathing flashing mode. The system consists of multiple guidance devices installed at intervals, each device including a light-transmitting cover, a light-emitting diode (LED), a control component, a power supply module, and mounting components. Addressing the problems of driver distraction caused by the instantaneous flashing of a single light in existing technologies, and the high energy consumption and short equipment lifespan caused by square wave control signals, this system uses pulse width modulation (PWM) technology to control the brightness of the LED, simulating a breathing rhythm to achieve a gradual brightening and dimming effect. Specifically, a microcontroller generates a PWM signal and adjusts the duty cycle to slowly increase and decrease the brightness within the cycle, forming a soft, gradual sinusoidal PWM signal. This system can enhance the visibility of road contours at night and in inclement weather, reduce visual stimulation, improve driving comfort and safety, and simultaneously reduce energy consumption and extend the lifespan of the light source through dynamic brightness adjustment.

Description

Technical Field

[0001] This utility model relates to the field of road traffic safety technology, specifically to a road contour warning and guidance light and system with a breathing flashing mode. Background Technology

[0002] Currently, my country has installed contour warning lights on both sides of highways and some national and provincial roads where accidents or extreme weather are frequent. When vehicles are traveling at high speeds, drivers rely on the light from these warning lights to judge the road ahead and the boundaries on both sides, allowing them to take appropriate measures in advance based on sufficient safe visibility. In recent years, road contour warning and guidance products that actively emit light and are installed on road shoulders have emerged, with fog guidance devices or systems being representative examples.

[0003] Fog guidance equipment is a type of roadside active light-emitting guidance device that has become widely used in the road traffic industry in recent years. The equipment uses dozens of LED beads emitting light simultaneously. It has a large luminous area, strong light intensity, and good penetration. It is primarily used in foggy or rainy weather, where visibility is extremely limited and vehicle speeds are slow, utilizing the halo of light reflected from dense fog or exhaust particles to create a light band that drivers can see.

[0004] In the prior art, Chinese invention patent (CN205845337U) discloses a low visibility guidance system for highways. The system includes: a low visibility area warning section, comprising variable message signs, broadcasting equipment, variable speed limit signs, and yellow strobe lights; a low visibility area guidance section, comprising a visibility meter, a microwave vehicle detector, an area controller, a weather station, and intelligent contour indicators; and system software connected to and controlling the aforementioned components via a mobile network or optical communication. This invention enables the warning and guidance sections to be linked for control, providing early warnings and speed limits to vehicles entering low visibility areas, reminding drivers to drive cautiously; using low visibility, traffic flow, and weather information as trigger sources for system control strategies, allowing for more comprehensive guidance strategies; and an emergency linkage function, notifying emergency response units (such as road administration, fire departments, toll stations, hospitals, and traffic police) to coordinate and implement joint plans in the event of an emergency, ensuring timely rescue. Existing warning light flashing technology, based on the second-by-second global synchronization of GPS clock chips, has a 1:1 duty cycle for the light's on / off state within one second. In large-scale road deployment, firstly, the momentary flashing of a single light can be distracting to drivers, especially those who drive for extended periods, as continuous flashing can divert their attention. Secondly, high-frequency momentary flashing can easily convey incorrect information, creating a psychological suggestion of "emergency" for the driver, potentially leading to sudden braking or deceleration at high speeds, which can easily cause traffic accidents. Summary of the Invention

[0005] The purpose of this invention is to solve the problems of driver distraction caused by the instantaneous flashing of a single light in the prior art, as well as the high energy consumption and short equipment life caused by square wave control signals. It proposes a road contour warning and guidance light and system with a breathing flashing mode.

[0006] On the one hand, this utility model proposes a road contour warning and guidance light with a breathing flashing mode, including:

[0007] PWM waveform generator;

[0008] The driving circuit is used to receive a PWM signal from the PWM waveform generator and output current according to the PWM signal;

[0009] A light-emitting diode that receives the current output from the driving circuit;

[0010] The frequency range of the PWM signal is 100Hz to 1kHz, and the frequency of the PWM signal changes cyclically by gradually increasing to a peak value and then gradually decreasing to a trough value, with the cycle range of 10 seconds to 30 seconds.

[0011] The road contour warning and guidance light also includes a light-transmitting cover, a light-emitting diode, a control component, a power supply module, and a mounting component;

[0012] The control component includes a microcontroller and a drive circuit.

[0013] The microcontroller includes a PWM waveform generator;

[0014] The microcontroller is connected to the drive circuit and the power supply module, and the PWM waveform generator in the microcontroller is used to generate the PWM signal.

[0015] The driving circuit is connected to the light-emitting diode and the microcontroller, and the driving circuit converts the PWM signal into a current signal to drive the light-emitting diode;

[0016] The power supply module is connected to the control component and the light-emitting diode, and the power supply module supplies power to the control component and the light-emitting diode;

[0017] The mounting assembly is used to fix the road contour warning and guidance light to the road shoulder;

[0018] The PWM waveform generator controls the duty cycle of the PWM signal to vary between 0% and 100%, thereby controlling the brightness of the LED by varying the duty cycle of the PWM signal. Specifically, the preset breathing cycle of the PWM waveform generator controls the brightness of the LED to exhibit a sinusoidal change, including:

[0019] During the intake phase: the brightness of the light-emitting diode increases over time, from 0% to 100%;

[0020] During the exhalation phase: the brightness of the light-emitting diode decreases over time, from 100% to 0%.

[0021] The sinusoidal PWM signal is used to better attract the driver's attention at night or in adverse weather conditions, improving the visibility of road contours. Compared with square wave control signals, the sinusoidal PWM signal can better alleviate visual fatigue by providing gentle light changes through a frequency that simulates natural breathing, reducing visual stimulation to the driver and thus reducing visual fatigue. The PWM control method adjusts the duty cycle by periodically and rapidly switching the current, reducing the working cycle of the light-emitting diode. The non-continuous power supply mechanism can effectively reduce energy consumption and improve the service life of the road contour warning and guidance light.

[0022] Preferably, the driving circuit includes a MOSFET switching element and a current amplification circuit, wherein the gate of the MOSFET is connected to the PWM output terminal of the microcontroller, and the source is connected to the light-emitting diode.

[0023] Preferably, the ratio of the duration of the inhalation phase to the duration of the exhalation phase is 1:1 to 1:2, and the inhalation phase and the exhalation phase are executed sequentially in a cyclical manner.

[0024] More preferably, the frequency of the PWM signal is adjusted by the PWM waveform generator to control the length of the breathing cycle, so that the light-emitting diode can blink at different frequencies.

[0025] By flashing the LEDs at different frequencies, the system can better adapt to the needs of different scenarios. Different flashing frequencies can be used in different scenarios, such as urban and rural areas, and highways and low-speed roads, to ensure the best warning effect.

[0026] Preferably, the microcontroller dynamically adjusts the peak value of the PWM signal sine wave according to the ambient light intensity, so that the brightness of the road contour warning and guidance light forms a predetermined contrast with the ambient light. At the same time, the flashing pattern of the light-emitting diode can also be changed by adjusting the program.

[0027] The ambient light intensity can be obtained through an ambient light sensor, and the maximum value of the PWM signal duty cycle can be dynamically adjusted in combination with the light intensity to achieve the optimal brightness warning of the road contour warning and guidance light. In different weather conditions such as fog and rain, the brightness of the road contour warning and guidance light can be guaranteed to achieve a predetermined contrast with the ambient light. The flashing pattern of the light-emitting diode can be changed by editing the program to achieve a suitable warning pattern in different road surface scenarios.

[0028] On the other hand, this utility model proposes a road contour warning and guidance system with a breathing flashing mode, which includes a number of road contour warning and guidance lights installed longitudinally along the road. The distance between the road contour warning and guidance lights is 10 meters to 30 meters, and the breathing cycle of each road contour warning and guidance light is synchronously controlled by the microcontroller.

[0029] The use of a microcontroller to synchronously control the road contour warning lights ensures uniform flashing of the warning lights, resulting in better warning effects for long road sections.

[0030] Preferably, the road contour warning and guidance system controls each of the road contour warning and guidance lights via LoRa wireless broadcasting.

[0031] The specific process involves the host sending instructions that the entire system needs to execute, and each of the road contour warning lights receiving and executing the instructions via the LoRa wireless broadcast. The LoRa wireless broadcast uses independent control logic to maintain the breathing flashing function, which ensures that even if some road contour warning lights are damaged, the other road contour warning lights can still maintain normal operation, thus ensuring the stable operation of the entire system.

[0032] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0033] This invention provides a road contour warning and guidance system with a breathing flashing mode. The system consists of multiple guidance devices installed on the road shoulder at intervals of 10 to 30 meters. Each device includes a light-transmitting cover, a light-emitting diode, a control component, a power supply module, and mounting components. Addressing the problems of driver distraction caused by the instantaneous flashing of a single light in existing technologies, as well as high energy consumption and short equipment lifespan due to square wave control signals, this system generates a PWM signal through a microcontroller. Adjusting the duty cycle allows the brightness to rise and fall slowly within the cycle, forming a soft, gradual sinusoidal PWM signal. This effectively reduces the distraction and visual fatigue caused by the instantaneous flashing of a single light in traditional systems. Simultaneously, this invention uses the PWM signal to quickly cut off and connect the current, preventing the road contour warning and guidance lights from being in a continuous working state. Furthermore, adjusting the duty cycle allows for adjustment of the working cycle of the road contour warning and guidance lights, effectively reducing the energy consumption of the system and increasing the lifespan of the lights. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the road outline warning and guidance light in an embodiment of this utility model.

[0035] Figure 2 This is a timing diagram of the square wave control signal in an embodiment of this utility model.

[0036] Figure 3 This is a timing diagram of the sinusoidal PWM signal in an embodiment of this utility model.

[0037] Figure 4 This is a brightness-time curve of the square wave control signal in an embodiment of this utility model.

[0038] Figure 5 This is a brightness-time curve of the sinusoidal PWM signal in an embodiment of this utility model. Detailed Implementation

[0039] The present invention will be further described in detail below with reference to experimental examples and specific embodiments. However, this should not be construed as limiting the scope of the above-mentioned subject matter of the present invention to the following embodiments. All technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0040] Example 1

[0041] Most existing road contour warning lights use traditional flashing technology, which relies on the second-by-second global synchronization of GPS clock chips, resulting in a 1:1 duty cycle for the light's on / off state per second. In large-scale road deployments, firstly, the momentary flashing of a single light can be distracting to drivers, especially those who drive for extended periods; continuous flashing can divert their attention. Secondly, high-frequency, momentary flashing can easily cause visual fatigue, and prolonged visual fatigue can lead to traffic accidents. Furthermore, using traditional flashing methods keeps the road contour warning lights in a continuously powered state, leading to increased energy consumption and reduced equipment lifespan over extended periods.

[0042] Based on the problems of the prior art, this embodiment proposes a road contour warning and guidance light and system with a breathing flashing mode, wherein the road contour warning and guidance light includes:

[0043] PWM waveform generator;

[0044] The driving circuit is used to receive a PWM signal from the PWM waveform generator and output current according to the PWM signal;

[0045] LED 2 receives the current output from the driving circuit;

[0046] The frequency range of the PWM signal is 100Hz to 1kHz, and the frequency of the PWM signal changes cyclically by gradually increasing to a peak value and then gradually decreasing to a trough value, with the cycle range of 10 seconds to 30 seconds.

[0047] The road contour warning and guidance light also includes at least one light-transmitting cover 1, a light-emitting diode (2), a control component 3, a power supply module 4, and a mounting component 5;

[0048] The control component 3 includes a microcontroller and a drive circuit;

[0049] The microcontroller includes a PWM waveform generator;

[0050] The microcontroller is connected to the drive circuit and the power supply module 4, and the PWM waveform generator in the microcontroller is used to generate the PWM signal.

[0051] The driving circuit is connected to the light-emitting diode 2 and the microcontroller, and the driving circuit converts the PWM signal into a current signal to drive the light-emitting diode 2;

[0052] The power supply module 4 is connected to the control component 3 and the light-emitting diode 2, and the power supply module 4 supplies power to the control component 3 and the light-emitting diode 2;

[0053] The mounting component 5 is used to fix the road outline warning and guidance light to the road shoulder;

[0054] The PWM waveform generator controls the duty cycle of the PWM signal to vary between 0% and 100%, thereby controlling the brightness of the LED 2 by varying the duty cycle of the PWM signal. Specifically, the preset breathing cycle of the PWM waveform generator controls the brightness of the LED 2 to exhibit a sinusoidal change, including:

[0055] During the intake phase: the brightness of the light-emitting diode 2 increases over time, from 0% to 100%;

[0056] During the exhalation phase: the brightness of the light-emitting diode 2 decreases over time, from 100% to 0%.

[0057] The duration ratio of the inhalation phase to the exhalation phase is 1:1 to 1:2, and the inhalation phase and the exhalation phase are executed sequentially in a cycle to achieve the effect of continuous breathing flashing of the light-emitting diode 2.

[0058] The breathing cycle can be set according to different road conditions and environments. When applied to foggy highways, the breathing cycle can be set to 20 seconds, with 10 seconds for inhalation and 10 seconds for exhalation. Under this setting, the road contour warning system can effectively cope with the reduced visibility caused by foggy road sections, effectively transmit road contour information to the driver, and reduce the emergency braking rate. When applied to urban expressways, the breathing cycle can be set to 15 seconds, with 5 seconds for inhalation and 10 seconds for exhalation. In emergencies, the breathing cycle can be adjusted to 8 seconds by the microcontroller, with 3 seconds for inhalation and 5 seconds for exhalation. The microcontroller can adjust the cycle in real time according to different road conditions, which can significantly reduce the energy consumption of the road contour warning system compared to the continuous operation of square wave control signals.

[0059] Furthermore, the PWM signal used in this embodiment is specifically a sine wave. The brightness of the LED 2 is controlled by varying the duty cycle between 0% and 100%, which better attracts the driver's attention at night or in adverse weather conditions, improving the visibility of the road outline. Taking a flashing duty cycle of 1:1, a 1-second on / off cycle, and a maximum brightness of 100% as an example, the timing diagram of the square wave control signal is as follows: Figure 2 As shown, the timing diagram of the sinusoidal PWM signal is as follows: Figure 3As shown, comparing the timing diagrams of the two, it can be found that the sinusoidal PWM signal can better improve visual fatigue compared to the square wave control signal. By simulating the frequency of natural breathing, it provides gentle light changes, reducing visual stimulation to the driver and thus reducing visual fatigue. On the other hand, according to the brightness-time curve of the square wave control signal (as shown in the figure), Figure 4 (as shown) and the brightness-time curve of the sinusoidal PWM signal (as shown) Figure 5 As shown in the figure, the sinusoidal PWM signal used in this embodiment can effectively slow down the aging of the light-emitting diode 2 by operating at 100% brightness for a shorter time compared to the square wave control signal. At the same time, since the sinusoidal PWM signal is based on the PWM control in the microcontroller, it can quickly turn off the turn-on current. Compared with the continuous power supply of the square wave control signal, it can reduce energy consumption and improve the service life of the device.

[0060] The driving circuit includes a MOSFET switching element and a current amplification circuit. The gate of the MOSFET is connected to the PWM output terminal of the microcontroller, and the source is connected to the light-emitting diode 2. The PWM waveform generator generates a breathing flickering light-emitting pattern by controlling the change of the duty cycle. The brightness of the light-emitting diode 2 changes over time as shown in the curve... Figure 5 As shown, the curve is specifically a sine curve.

[0061] Furthermore, the frequency of the PWM signal is adjusted by the PWM waveform generator to control the length of the breathing cycle, enabling the LED 2 to flash at different frequencies. The different flashing frequencies of the LED 2 can better adapt to the needs of different scenarios. For example, in highway applications where the overall driving speed is high, the flashing frequency of the road contour warning light needs to be reduced accordingly to alleviate driver visual fatigue caused by flashing lights. In normal road applications where the overall driving speed is slow, the flashing frequency of the road contour warning light needs to be increased accordingly to avoid the road contour warning light flashing too slowly and failing to generate sufficient warning.

[0062] The microcontroller 3 dynamically adjusts the peak value of the PWM signal sine wave according to the ambient light intensity, so that the brightness of the road contour warning and guidance light forms a predetermined contrast with the ambient light. At the same time, the flashing pattern of the light-emitting diode 2 can be changed by adjusting the program.

[0063] The ambient light intensity can be obtained through an ambient light sensor, and the peak value of the PWM signal sine wave can be dynamically adjusted in combination with the light intensity to achieve the optimal brightness warning of the road contour warning light. In different weather conditions such as fog and rain, the brightness of the road contour warning light can be guaranteed to achieve a predetermined contrast with the ambient light to achieve a sufficient warning effect for drivers. On the other hand, the image editing capability of the light-emitting diode 2 enhances the applicability of the road contour warning light. The flashing pattern of the light-emitting diode 2 can be changed by editing the program to match the warning requirements of different roads.

[0064] The road contour warning and guidance lights are installed longitudinally along the road at intervals of 10 to 30 meters, and the breathing cycle of each road contour warning and guidance light is synchronously controlled by the microcontroller.

[0065] The spacing is adjusted according to different application scenarios. The higher the driving speed, the longer the spacing is required. At the same time, the microcontroller enables synchronous control of the road contour warning lights, which can ensure the uniformity of the flashing of the road contour warning lights and provide better warning effect for long road sections.

[0066] The road contour warning and guidance system uses LoRa wireless broadcasting to control each road contour warning and guidance light. Specifically, the host sends the instructions that the entire system needs to execute, and each road contour warning and guidance light receives and executes the instructions through LoRa wireless broadcasting.

[0067] The LoRa wireless broadcast uses independent control logic to maintain the breathing flashing function, which can ensure that even if some road contour warning lights are damaged, the other road contour warning lights can still maintain normal operation, thus ensuring the stable operation of the entire system.

Claims

1. A road profile warning induction lamp with a breathing flashing mode, characterized in that, include: PWM waveform generator; The driving circuit is used to receive a PWM signal from the PWM waveform generator and output current according to the PWM signal; A light-emitting diode (2) receives the current output from the driving circuit; The frequency range of the PWM signal is 100Hz to 1kHz, and the frequency of the PWM signal changes cyclically by gradually increasing to a peak value and then gradually decreasing to a trough value, with the cycle range of 10 seconds to 30 seconds.

2. A road contour warning and guidance light with a breathing flashing mode as described in claim 1, characterized in that, The PWM waveform generator controls the duty cycle of the PWM signal to vary between 0% and 100%, thereby controlling the brightness change of the light-emitting diode (2) by varying the duty cycle of the PWM signal.

3. A road contour warning and guidance light with a breathing flashing mode as described in claim 2, characterized in that, The brightness change curve of the light-emitting diode (2) is a sine curve.

4. A road contour warning and guidance light with a breathing flashing mode as described in claim 3, characterized in that, The preset breathing cycle of the PWM waveform generator controls the brightness of the light-emitting diode (2) to change sinusoidally, including: During the intake phase: the brightness of the light-emitting diode (2) increases over time, from 0% to 100%; During the exhalation phase: the brightness of the light-emitting diode (2) decreases over time, from 100% to 0%.

5. A road contour warning and guidance light with a breathing flashing mode as described in claim 4, characterized in that, The duration ratio of the inhalation phase to the exhalation phase is 1:1 to 1:2, and the inhalation phase and the exhalation phase are executed sequentially in a cyclical manner.

6. A road contour warning and guidance light with a breathing flashing mode as described in claim 1, characterized in that, The driving circuit includes a MOSFET switching element and a current amplification circuit. The gate of the MOSFET is connected to the PWM output terminal of the microcontroller, and the source is connected to the light-emitting diode (2).

7. A road contour warning and guidance light with a breathing flashing mode as described in claim 1, characterized in that, The frequency of the PWM signal is adjusted by the PWM waveform generator to control the length of the breathing cycle, so that the light-emitting diode (2) can flash at different frequencies.

8. A road contour warning and guidance light with a breathing flashing mode as described in claim 1, characterized in that, The PWM waveform generator dynamically adjusts the peak value of the PWM signal sine wave according to the ambient light intensity, so that the brightness of the road contour warning and guidance light forms a predetermined contrast with the ambient light.

9. A road contour warning and guidance system with a breathing flashing mode, characterized in that, The system includes several road contour warning and guidance lights installed longitudinally along the road. The spacing between the road contour warning and guidance lights is 10 to 30 meters, and the breathing cycle of each road contour warning and guidance light is synchronously controlled by a microcontroller.

10. A road contour warning and guidance system with a breathing flashing mode as described in claim 9, characterized in that, The road contour warning and guidance system controls each road contour warning and guidance light via LoRa wireless broadcasting.

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