Highway ramp guide light strip with collision warning function

Abstract

This utility model discloses a highway ramp guide light strip with collision warning function, including a light strip body and a light controller. The light controller includes a light control MCU module, a vibration detection module, a relay, and a power supply module. One signal output terminal of the light control MCU module is connected to the control terminal of the relay, the output terminal of the power supply module is connected to the upper contact of the relay, and the lower contact of the relay is connected to the power supply terminal of the light strip body. The vibration detection module includes several vibration detection units installed at intervals on the light strip body. The connection point between the vibration switch and the lower resistor of each vibration detection unit is connected in series and then connected to the AD acquisition terminal of the light control MCU module. This vibration detection module can be wired along the light strip body and powered and signal detected by the power supply of the light strip and the microcontroller. It has the characteristics of simple and reliable vibration detection principle, convenient wiring and power supply, etc., ensuring the normal operation of traffic facilities and driving safety.

Description

Technical Field

[0001] This utility model belongs to the field of highway traffic management technology and relates to a highway ramp guide light strip with collision warning function. Background Technology

[0002] Currently, incidents of vehicles crashing into guardrails while driving on highway ramps are frequent, especially for inexperienced novice drivers driving at night. Due to poor visibility at night and slow reaction time to changes in the route, traffic accidents often occur. Therefore, it is necessary to install lighting strips on ramps as a safety guidance and warning system, which is essential to improve safe driving on ramps.

[0003] Chinese patent application number 202420134898.0, entitled "A Highway Ramp Lane Change Warning Device," discloses a highway ramp lane change warning device consisting of a ramp warning light strip on the inner wall of the outer guardrail of the ramp. However, these guardrails or light strips lack collision warning devices, meaning that even if a vehicle collides with the guardrail on the ramp, it cannot be detected in time. This results in two problems: firstly, it is difficult to locate the vehicle involved in the accident after damage to traffic facilities; secondly, it hinders timely rescue efforts in the event of a major traffic accident. Utility Model Content

[0004] To address the aforementioned issues, this invention proposes a highway ramp guide light strip with a collision warning function. By periodically installing vibration sensors on the guide light strip, an alarm can be promptly triggered and fed back to the command center when a vehicle collides with the guardrail on the ramp. The condition of the accident vehicle can also be observed through a video PTZ camera.

[0005] The technical solution of this utility model is as follows:

[0006] A highway ramp guide light strip with collision warning function includes a light strip body and a light controller. The light controller includes a light control MCU module, a vibration detection module, a relay, and a power supply module. The power supply module is electrically connected to the light control MCU module, the vibration detection module, and the relay.

[0007] One signal output terminal of the lighting control MCU module is connected to the control terminal of the relay, the output terminal of the power module is connected to the upper contact of the relay, and the lower contact of the relay is connected to the power supply terminal of the light strip body.

[0008] The vibration detection module includes several vibration detection units installed at intervals on the light strip body. Each vibration detection unit consists of an upper resistor, a vibration switch, and a lower resistor connected in series between the power output terminal and the ground terminal. The connection point between the vibration switch and the lower resistor of each vibration detection unit is connected in series to the AD acquisition terminal of the lighting control MCU module. The vibration switch is a normally open ball switch.

[0009] In the aforementioned highway ramp guide light strip with collision warning function, the light strip body is an LED light strip installed on the ramp guardrail along the ramp direction; the light controller is installed on the guardrail at the middle position of the light strip body.

[0010] In the aforementioned highway ramp guide light strips with collision warning function, a vibration detection unit is installed every 5-10 meters along the light strip body.

[0011] In the aforementioned highway ramp guide light strips with collision warning function, the lighting control MCU module is an STM32F0 / F microcontroller.

[0012] The aforementioned highway ramp guide light strip with collision warning function also includes a wireless module that is electrically connected to the lighting control MCU module via an RS485 interface. The lighting control MCU module interacts with the remote main control unit via the wireless module.

[0013] In the aforementioned highway ramp guide light strips with collision warning function, both the upper and lower resistors are 100kΩ resistors.

[0014] In the aforementioned highway ramp guide light strip with collision warning function, the main control unit is electromechanically connected to the vehicle identification sensor, the illuminance sensor, and the video sphere.

[0015] In the aforementioned highway ramp guide light strip with collision warning function, the vehicle identification sensor is a camera or radar tester, installed facing the ramp entrance.

[0016] The main control unit of the highway ramp guide light strip with collision warning function consists of an STM32F407VET6 microcontroller and peripheral devices. The main control unit interacts with the command and control center wirelessly.

[0017] The technical effects of this utility model are as follows:

[0018] I. This utility model installs LED light strips on both sides of the ramp, and installs a vibration sensing unit on the light strip every 5-10m. The light controller obtains the signal from the vibration sensor to determine whether there is a vehicle collision with the guardrail. Once an abnormal sensor output is detected, the information is sent to the command and control center through the remote main control unit, and the video dome camera is rotated to obtain the video of the accident scene, so as to record and rescue the accident vehicle in a timely manner and ensure the traffic safety of the ramp.

[0019] II. The vibration detection module of this utility model uses several vibration sensors installed on the light strip. The trigger switch is a normally open ball switch. Only when subjected to strong vibration does the ball intermittently contact the switch electrode, causing the switch to conduct intermittently. The signal is collected by the AD acquisition terminal of the lighting control MCU module to determine whether vibration has occurred. This vibration detection module can be wired along the light strip body and powered and signal detected by the power supply of the light strip and the microcontroller. It has the characteristics of simple and reliable vibration detection principle and convenient wiring and power supply, and can effectively realize the impact warning of ramp guardrails and light strips. Attached Figure Description

[0020] Figure 1 This invention relates to the composition principle of the intelligent lighting safety guidance system for highway ramps.

[0021] Figure 2 This is a schematic diagram of the LED strip with vibration sensor of this utility model.

[0022] Figure 3 This is a circuit diagram of the vibration detection module of this utility model;

[0023] In the diagram: 1-Main road; 2-Ramp; 3-Ramp entrance; 4-Vehicle; 5-Vehicle identification sensor; 6-Illumination sensor; 7-Main control unit; 8-Light strip; 9-Lighting controller; 10-Command and control center; 12-Vibration detection unit; 13-Video PTZ camera; 14-Vibration switch; R1-Upper resistor; R2-Lower resistor; GND-Ground terminal. Detailed Implementation

[0024] like Figure 1 As shown, the intelligent lighting safety guidance and warning system for highway ramps includes a vehicle identification sensor 5, a lighting controller 9, a main control unit 7, an illuminance sensor 6, and a video PTZ camera 12. The vehicle identification sensor 5, main control unit 7, and illuminance sensor 6 are mounted on poles along the roadside of the main road 1. The vehicle identification sensor 5 is a camera or radar tester, installed facing the ramp entrance 3. The video PTZ camera 12 is mounted on a high pole, and its pan-tilt unit can rotate to image the entire ramp section. The vehicle identification sensor 5 collects the travel information of vehicles 4 about to enter ramp 2 and sends the signal to the main control unit 7. The light strip is an LED light strip, and the light strip itself is installed on the guardrails on both sides of ramp 2.

[0025] The main control unit 7 consists of an STM32F407VET6 microcontroller and peripheral devices. The main control unit 7 acquires signals from the illuminance sensor 6 to determine whether the light strip needs to be turned on. Once the lighting conditions are met at night, it sends a command to the lighting controller 9 to illuminate the light strip, ensuring that the vehicle 4's lights are on before entering ramp 2, providing a safety reminder. The lights automatically turn off after the vehicle 4 leaves ramp 2, achieving a synchronized intelligent safety warning control effect of "lights on when a vehicle approaches, lights off when a vehicle leaves." The duration of the light strip illumination is estimated based on the minimum driving speed and distance of the ramp, with a time allowance to ensure that most vehicles can exit the ramp. For example, at a certain interchange on the Baomao Expressway, the minimum driving speed is set to 10 km / h. This test section includes a transition section and a deceleration section, with a total ramp length of 404.01 m. The initial design duration of the light strip illumination is 145 seconds.

[0026] like Figure 2 and Figure 3 As shown, the light strip with impact warning function of this utility model includes a light strip body 8 and a light controller 9. The light controller 9 includes a light control MCU module, a vibration detection module, a relay, and a power supply module. The power supply module is electrically connected to the light control MCU module, the relay, and the vibration detection module. The AC power of AV220V is converted to DC220V DC power by a SITOPPSU100B voltage regulator and rectifier. One output terminal is connected to the relay contacts, and the other output terminal is converted to DC12V through a DC-DC module to power the light strip. In addition, the DC-DC module also outputs DC5V to power the vibration detection module.

[0027] The lighting control MCU module uses an STM32F0 / F chip. One of its signal output terminals is connected to the control terminal of the relay, and the power supply output terminal is connected to the upper contact of the relay. The lower contact of the relay is connected to the power supply terminal of the LED strip. The upper and lower contacts are normally open contacts. Only when the lighting control MCU module outputs a high level and applies it to the relay control terminal will the lower and upper contacts of the relay close, supplying power to the LED strip.

[0028] The vibration detection module includes several vibration detection units 12 installed at intervals on the body of the light strip 8, typically one vibration detection unit 12 every 5-10 meters along the body of the light strip 8. Each vibration detection unit 12 consists of an upper resistor R1, a vibration switch 14, and a lower resistor R2 connected in series between the DC power output terminal and the ground terminal GND; the connection point between the vibration switch and the lower resistor R2 of each vibration detection unit is connected in series to the AD acquisition terminal of the lighting control MCU module.

[0029] Vibration switch 14 is a commercially available normally open ball switch. When subjected to vibration, the ball intermittently contacts the switch electrodes, causing the switch to conduct intermittently. A ball switch, also known as a vibration switch or ball tilt switch, is a mechanically triggered vibration sensor. Its working principle is simple and inexpensive, and it is commonly used to detect vibration, tilt, or displacement. The core structure includes a conductive metal ball and a housing. Conductive metal electrodes are fixed to both ends or side walls of the housing, and the spacing is designed so that the ball is not in contact with the electrodes when stationary. In the stationary state, the ball remains at the bottom of the housing due to gravity, not in contact with the electrodes, and the circuit is open (open circuit state). When subjected to vibration or tilt, the ball rolls due to inertia or gravity. The ball contacts one or more electrodes, forming a conductive path, and the circuit is closed (conducting state). After the vibration stops, the ball returns to the bottom, and the circuit is open again. Its sensitivity mainly depends on the ball mass, housing shape, and electrode spacing. In this project, to prevent signal interference caused by small amplitude disturbances, the SW200NO type ball switch was selected, and its sensitivity was optimized and improved.

[0030] Figure 3 In the circuit, both the upper resistor R1 and the lower resistor R2 are 100kΩ. The upper resistor is connected to a 5V DC power supply. The connection point between the vibration switch and the lower resistor R2 is connected to the AD acquisition terminal of the lighting control MCU module. When the vibration switch is in a non-interference state, all channels are open, and the AD signal is 0. When the ball switch is subjected to significant vibration, the ball contacts the electrode, forming a conductive path. At this time, the AD signal is 2.5V, but this signal exhibits intermittent pulse signals depending on the characteristics of the vibration. Under normal circumstances, all vibration detection unit channels (1# to n#) are in an open-circuit state, and the AD signal is 0. When a vehicle scrapes or hits the guardrail, one or more vibration detection units at the impact point oscillate at high frequency and output a pulse square wave signal, which can then be obtained from the AD acquisition terminal. After acquiring the signal, the lighting control MCU module wirelessly interacts with the remote main control unit via an RS485-loRa converter. The loRa wireless module enables wireless data transmission over 2km and sends the vibration switch signal, i.e., the output level value of the vibration detection module, to the main control unit 7.

[0031] Once a vibration signal is detected, the main control unit 7 sends a command to the video PTZ camera 13. The PTZ camera 13 then activates its pan-tilt mechanism to scan the entire ramp area, searching for any vehicles passing through and recording their video feeds. Simultaneously, the main control unit 7 transmits the information to the command and control center 10 via an RS485-4G module, enabling early warning reporting. Manual assessment is then conducted to determine if the vehicle has sustained serious damage and to determine the appropriate course of action for handling the traffic accident.

[0032] This invention utilizes LED light strips installed on both sides of a ramp as a base, with vibration sensors spaced along the light strips to detect vehicle collisions with guardrails. Information is transmitted from a remote main control unit to the command and control center, where a rotating video PTZ camera captures video of the accident scene, enabling timely recording and assistance of the affected vehicles, thus ensuring ramp traffic safety. This vibration detection module can be wired along the light strip itself and powered and signal-detected via the light strip's power supply and a microcontroller. It features a simple and reliable vibration detection principle, convenient wiring and power supply, ensuring the normal operation of traffic facilities and driving safety.

Claims

1. A highway ramp guide light strip with impact warning function, comprising a light strip (8) body and a light controller (9), characterized in that: The lighting controller (9) includes a lighting control MCU module, a vibration detection module, a relay, and a power supply module; the power supply module is electrically connected to the lighting control MCU module, the vibration detection module, and the relay. One signal output terminal of the lamp control MCU module is connected to the control terminal of the relay, the output terminal of the power module is connected to the upper contact of the relay, and the lower contact of the relay is connected to the power supply terminal of the lamp strip (8) body. The vibration detection module includes several vibration detection units installed at intervals on the body of the light strip (8). Each vibration detection unit consists of an upper resistor (R1), a vibration switch (14), and a lower resistor (R2) connected in series between the power output terminal and the ground terminal (GND). The connection point between the vibration switch (14) and the lower resistor (R2) of each vibration detection unit is connected in series to the AD acquisition terminal of the lighting control MCU module. The vibration switch (14) is a normally open ball switch.

2. The highway ramp guide light strip with impact warning function according to claim 1, characterized in that: The main body of the light strip (8) is an LED light strip installed on the ramp guardrail along the ramp direction; the light controller (9) is installed on the guardrail at the middle position of the main body of the light strip (8).

3. The highway ramp guide light strip with impact warning function according to claim 1, characterized in that: A vibration detection unit (12) is installed every 5-10 meters along the main body of the light strip (8).

4. The highway ramp guide light strip with collision warning function according to claim 1, characterized in that: The lighting control MCU module is an STM32F0 / F microcontroller.

5. The highway ramp guide light strip with collision warning function according to claim 1, characterized in that: The lighting controller (9) also includes a wireless module that is electrically connected to the lighting control MCU module via an RS485 interface. The lighting control MCU module interacts with the remote master control unit (7) via the wireless module.

6. The highway ramp guide light strip with collision warning function according to claim 1, characterized in that: Both the upper resistor (R1) and the lower resistor (R2) should initially be 100kΩ resistors.

7. The highway ramp guide light strip with collision warning function according to claim 5, characterized in that: The main control unit (7) is electrically connected to the vehicle identification sensor (5), the illuminance sensor (6), and the video PTZ camera (13).

8. The highway ramp guide light strip with collision warning function according to claim 7, characterized in that: The vehicle identification sensor (5) is a camera or radar tester, installed facing the ramp entrance (3).

9. The highway ramp guide light strip with collision warning function according to claim 5, characterized in that: The main control unit (7) consists of an STM32F407VET6 microcontroller and peripheral devices. The main control unit (7) interacts with the command and control center (10) wirelessly.

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