Sideslip risk warning device at interchange exit ramp

Abstract

The utility model discloses a sideslip risk warning device at an interchange exit ramp, and the device comprises a speed measurement assembly which is disposed at the starting point of a deceleration lane of the interchange exit ramp and is fixed on a roadside handrail; the speed measuring assembly comprises an infrared speed detector, and the infrared speed detector is used for detecting the running speed of a passing vehicle; the warning assembly is arranged at the middle section of a deceleration lane of the interchange exit ramp, and the warning assembly comprises a warning unit capable of sending out a warning signal; and the data processing module is used for receiving and processing a signal of the infrared speed detector and can control the warning unit to send out a warning signal. By the adoption of the scheme, the vehicle which is about to be driven into the ramp at the interchange exit in a split mode and is about to be driven into the ramp at the interchange exit in a split mode can receive the speed early warning in advance and has sufficient time to decelerate, it is guaranteed that the vehicle does not sideslip after being driven into the ramp, and the driving safety of the vehicle at the interchange exit is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of traffic safety facilities technology, specifically to a skid risk warning device at the exit ramp of an interchange. Background Technology

[0002] Grade-separated interchanges are crucial nodes in road traffic networks, and ramps are an essential component of these interchanges. Because ramps often have lower alignment standards and design speeds significantly lower than those of the main road, vehicles must control their speed as they diverge from the main road onto the ramp to adapt to its alignment. If drivers neglect speed control during this process, vehicles may skid during the divergence, potentially leading to severe damage to vehicles and road infrastructure, and even injuries or fatalities.

[0003] Therefore, developing a device that can effectively warn drivers based on the specific speed of a vehicle has become a problem that needs to be solved to ensure traffic safety at interchanges. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention aims to provide a skid risk warning device for interchange exit ramps. By adopting this solution, vehicles that are about to enter the ramp at an excessive speed at the interchange exit can receive a speed warning in advance and have sufficient time to decelerate, ensuring that the vehicles do not skid after entering the ramp and guaranteeing the safety of vehicle traffic at the interchange exit.

[0005] This utility model is achieved through the following technical solution:

[0006] A skid risk warning device at an interchange exit ramp includes:

[0007] A speed measuring component is installed at the starting point of the deceleration lane of the interchange exit ramp and fixed to the roadside guardrail; the speed measuring component includes an infrared speed detector, which is used to detect the speed of passing vehicles.

[0008] A warning component is installed in the middle section of the deceleration lane of the interchange exit ramp, and the warning component includes a warning unit capable of emitting a warning signal;

[0009] The data processing module is used to receive and process the signals from the infrared speed detector and to control the warning unit to issue warning signals.

[0010] Compared to existing technologies where vehicles need to control their speed to adapt to the ramp's alignment during the merging process from the main road, this invention provides a lateral skidding risk warning device for interchange exit ramps. This device allows vehicles approaching the ramp at excessive speed to receive an early warning and have sufficient time to decelerate, preventing skidding accidents and ensuring vehicle safety at interchange exits. Specifically, the device includes a speed measuring component at the start of the deceleration lane on the interchange exit ramp and a warning component in the middle of the deceleration lane. The speed measuring component includes an infrared speed detector, which consists of two parts: a transmitter and a receiver. The transmitter is an infrared emitter, and the receiver is an infrared receiver. When a vehicle approaches the transmitting device, the receiving device receives higher-frequency infrared radiation; when the vehicle moves away, the receiving device receives lower-frequency infrared radiation. The receiving device calculates the object's speed by measuring the changes in the frequency of the received infrared radiation. Typically, the receiving device converts the received infrared signal into an electrical signal, which is then processed to obtain the vehicle's speed value. In this way, the infrared speed detector can measure the vehicle's speed in advance at the start of the deceleration lane at the interchange exit ramp. If the vehicle speed is too high, a warning signal can be issued through a warning unit in the middle of the deceleration lane at the interchange exit ramp, giving the vehicle sufficient time to decelerate and ensuring that the vehicle does not skid after entering the ramp, thus guaranteeing the safety of vehicles traveling at the interchange exit.

[0011] As a redundancy solution, the speed measuring component is installed at a distance of 95-225m from the exit spur of the interchange. Its location depends on the specific design speeds of the interchange's main line and ramps.

[0012] The system also includes a support rod for installing the warning components and the data processing module. The bottom of the support rod is connected to the bottom surface via a second fixed base, and both the warning components and the data processing module are mounted on the support rod.

[0013] Because the alignment of ramps at different interchanges and with different functions varies, the safe driving speed limits also differ. Current speed warning devices are rather general and lack specificity in their warning ranges. Therefore, to calculate the critical speed for vehicle sideslip based on the actual alignment parameters of the ramps, the data processing module includes a housing with an embedded microcontroller. A data receiver is fixed to the top of the housing, and the receiver is connected to both the infrared speed detector and the microcontroller. The microcontroller processes the received signals and outputs warning signals to the warning unit. In this solution, to calculate the critical speed for vehicle sideslip based on the actual longitudinal slope, superelevation, and road surface adhesion coefficient of the designated ramp, the data processing module also includes a microcontroller. The microcontroller is the core component, installed internally, with an external antenna for receiving and transmitting signals. The microcontroller consists of a central processing unit, memory, input / output interfaces, and a clock circuit. The central processing unit executes instructions and processes vehicle speed data. The memory stores the sideslip risk calculation program and processed data. The input / output interface receives speed signals detected by the infrared speedometer and outputs warning signals to the LED warning screen. The microcontroller processes the speed signals emitted by the roadside infrared speedometer; the program set by the microcontroller's central processing unit calculates the risk of vehicle skidding based on the speed value.

[0014] After measuring the vehicle speed, the roadside infrared speedometer transmits the speed signal to the data receiving device. The signal is then transmitted to the central processing unit of the microcontroller. The central processing unit compares the measured vehicle speed with the critical speed for sideslip. If the measured speed is less than the critical speed, the microcontroller's output interface sends a signal indicating safe vehicle speed to the LED warning screen's control system. The LED display will then show the message "Speed ​​is safe, please maintain this speed." If the measured speed is greater than or equal to the critical speed, the microcontroller's output interface sends a signal indicating dangerous vehicle speed to the LED warning screen's control system. The LED display will then show the message "Speed ​​too high, please slow down."

[0015] To protect the microcontroller, the data processing module also includes a chassis that is detachably connected to the support rod, and the device housing is installed inside the chassis.

[0016] To enable the detachable connection of the warning unit, at least two crossbeams are provided at the top of the support rod along its length, and the crossbeams are inserted into the support rod; the back of the warning unit is connected to the crossbeams via a clamp.

[0017] To display text messages such as "Safe speed, please maintain this speed" and "Excessive speed, please slow down," the warning unit uses an LED display screen. The LED display screen needs to be installed at a distance of 45-110m from the exit merging nose of the interchange, depending on the specific design speed of the main road and ramps. It consists of a control system and light-emitting diodes (LEDs). The control system receives warning signals output from the data processing device and controls the semiconductor LEDs to display the warning text.

[0018] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0019] 1. This utility model provides a skid risk warning device at the exit ramp of an interchange. It receives vehicle speed signals from an infrared speedometer through a data processing device, calculates the skid risk through a single-chip microcomputer central processor, and sends a warning signal to an LED warning screen. The corresponding warning text is displayed on the LED screen, so that vehicles that are about to enter the ramp at the interchange exit at excessive speed can receive a speed warning in advance and have sufficient time to decelerate, ensuring that the vehicle does not skid after entering the ramp and ensuring the safety of vehicle driving at the interchange exit.

[0020] 2. This utility model provides a skid risk warning device at the exit ramp of an interchange, which calculates the critical speed value of vehicle skid based on the actual longitudinal slope, superelevation and road surface adhesion coefficient of the ramp at the divergence point.

[0021] 3. The side slip risk warning device at the exit ramp of the interchange provided by this utility model adopts a microcontroller as a data processing device, which further enhances the economy and convenience of the product while ensuring the reliability and integrity of the function. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0023] Figure 1 An installation elevation view of the ramp side slip risk warning device provided by this utility model;

[0024] Figure 2 Top view of the installation of the ramp skid risk warning device provided by this utility model;

[0025] Figure 3 A schematic diagram of the structure of the speed measuring component provided by this utility model;

[0026] Figure 4 A schematic diagram of the structure of the data processing module provided by this utility model;

[0027] Figure 5 This is a schematic diagram of the microcontroller provided by this utility model;

[0028] Figure 6 A schematic diagram showing the installation positions of the warning component and data processing module provided by this utility model.

[0029] The attached diagram shows the markings and corresponding component names:

[0030] 1-Speed ​​measuring component, 101-Infrared speed detector, 102-Connecting rod, 103-First fixed base, 104-Metal plate, 2-Warning component, 201-Warning unit, 202-Crossbeam, 3-Data processing module, 301-Microcontroller, 302-Device housing, 303-Data receiver, 304-Chassis, 4-Support rod, 5-Second fixed base. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0032] Example 1: This Example 1 provides a skid risk warning device at the exit ramp of an interchange, such as... Figures 1-3 As shown, it includes:

[0033] Speed ​​measuring component 1 is installed at the starting point of the deceleration lane of the interchange exit ramp and fixed to the roadside guardrail; the speed measuring component 1 includes an infrared speed detector 101, which is used to detect the speed of passing vehicles.

[0034] Warning component 2, which is installed in the middle section of the deceleration lane of the interchange exit ramp, includes a warning unit 201 that can emit a warning signal;

[0035] The data processing module 3 is used to receive and process the signals from the infrared speed detector 101, and can control the warning unit 201 to issue a warning signal.

[0036] Compared to existing technologies, where vehicles need to control their speed to adapt to the ramp's alignment during the merging process from the main road, this invention provides a lateral skidding risk warning device for interchange exit ramps. This device allows vehicles approaching the ramp at excessive speed to receive an early warning and have sufficient time to decelerate, preventing lateral skidding accidents and ensuring vehicle safety at interchange exits. Specifically, the device includes a speed measuring component 1 located at the start of the deceleration lane on the interchange exit ramp, and a warning component 2 located in the middle of the deceleration lane. The speed measuring component 1 includes an infrared speed detector 101, which consists of two parts: a transmitting device and a receiving device. The transmitting device is an infrared transmitter, and the receiving device is an infrared receiver. When a vehicle approaches the transmitting device, the receiving device receives higher-frequency infrared radiation; when the vehicle moves away from the transmitting device, the receiving device receives lower-frequency infrared radiation. The receiving device calculates the speed of the object by measuring the changes in the frequency of the received infrared radiation. Typically, the receiving device converts the received infrared signal into an electrical signal, which is then processed to obtain the vehicle's speed value. In this way, the infrared speed detector 101 can detect the vehicle speed in advance at the start of the deceleration lane of the interchange exit ramp. If the vehicle speed is too high, a warning signal can be issued through the warning unit 201 in the middle of the deceleration lane of the interchange exit ramp, giving the vehicle sufficient time to decelerate and ensuring that the vehicle does not skid after entering the ramp, thus ensuring the safety of vehicle traffic at the interchange exit.

[0037] As a redundancy solution, the speed measuring component 1 is installed at a distance of 95-225m from the exit divergence nose of the interchange. Its location needs to be determined based on the specific design speeds of the interchange's main line and ramps.

[0038] Example 2: This Example 2 further defines the structure of the warning component 2 and the data processing module 3 based on Example 1. For example... Figures 4-6 As shown.

[0039] For the installation of the warning component 2 and the data processing module 3, a support rod 4 is also included. The bottom of the support rod 4 is connected to the bottom surface through a second fixed base 5. Both the warning component 2 and the data processing module 3 are mounted on the support rod 4.

[0040] Because the alignment of ramps at different interchanges and with different functions varies, the safe driving speed limits also differ. Current speed warning devices are rather general and lack specificity in their warning ranges. Therefore, to calculate the critical speed for vehicle sideslip based on the actual alignment parameters of the ramps, the data processing module 3 includes a housing 302 with a microcontroller 301 embedded inside. A data receiver 303 is fixed to the top of the housing 302, and the data receiver 303 is connected to both the infrared speed detector 101 and the microcontroller 301. The microcontroller 301 processes the received signals and outputs warning signals to the warning unit 201. In this solution, to calculate the critical speed for vehicle sideslip based on the actual longitudinal slope, superelevation, and road surface adhesion coefficient of the designated ramp, the data processing module 3 also includes a microcontroller 301. The microcontroller 301 is the core component, installed internally, with an external antenna for receiving and transmitting signals. The microcontroller 301 is used to process the speed signals emitted by the roadside infrared speedometer; the program set in the central processing unit of the microcontroller 301 calculates the risk of vehicle skidding based on the speed value. The specific program settings are as follows:

[0041] After entering the ramp section, the vehicle will be subject to centrifugal force while driving, and this force will increase with the vehicle speed. When the vehicle speed increases to a critical value, the adhesion force on the vehicle is insufficient to keep the vehicle in a stable state. At this point, the centrifugal force on the vehicle will cause it to sideslip. The equilibrium force analysis of the vehicle in the critical state is shown in the following formula.

[0042] ;

[0043] In the formula The adhesion force (N) experienced by the vehicle. The longitudinal slope angle of the ramp is (°). The lateral superelevation angle of the ramp is (°). The centrifugal force (N) acting on the vehicle. The size calculation is shown in the following formula.

[0044]

[0045]

[0046]

[0047]

[0048] The adhesion force experienced by the vehicle can be obtained from the above formula. The calculation formula.

[0049]

[0050] In the formula Let be the road surface adhesion coefficient. Solving the above equations simultaneously, we obtain the critical speed for vehicle sideslip. The calculation formula.

[0051]

[0052] Therefore, when vehicles diverge at the exit of an interchange and enter the ramp, they should ensure that their speed is less than the critical speed. This is to ensure the safe passage of vehicles.

[0053] In the above calculation process, the longitudinal slope angle of the ramp lateral superelevation angle of ramp and road surface adhesion coefficient This needs to be done based on the actual setup. When programming the microcontroller 301, this patent will pre-input parameters related to the ramp alignment and calculate a critical vehicle sideslip speed. .

[0054] After the roadside infrared speedometer measures the vehicle speed, it transmits the speed signal to the data receiving device. The signal is then transmitted to the central processing unit of the 301 microcontroller. The central processing unit compares the measured vehicle speed with the critical speed for sideslip. If the measured speed is less than the critical speed, the 301 microcontroller outputs a signal indicating safe vehicle speed to the LED warning screen control system, and the LED display shows the message "Speed ​​is safe, please maintain this speed." If the measured speed is greater than or equal to the critical speed, the 301 microcontroller outputs a signal indicating dangerous vehicle speed to the LED warning screen control system, and the LED display shows the message "Speed ​​too high, please slow down."

[0055] To protect the microcontroller 301, the data processing module 3 also includes a chassis 304 that is detachably connected to the support rod 4, and the device housing 302 is installed inside the chassis 304.

[0056] To enable the detachable connection of the warning unit 201, at least two crossbeams 202 are provided at the top of the support rod 4 along its length, and the crossbeams 202 are inserted into the support rod 4; the back of the warning unit 201 is connected to the crossbeams 202 via a clamp.

[0057] To display text messages such as "Safe speed, please maintain this speed" and "Excessive speed, please slow down," the warning unit 201 uses an LED display screen. The LED display screen needs to be installed at a distance of 45-110m from the exit merging nose of the interchange, depending on the specific design speed of the main line and ramps. It consists of a control system and light-emitting diodes (LEDs). The control system receives warning signals output from the data processing device and controls the semiconductor LEDs to display the warning text.

[0058] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A skid risk warning device at the exit ramp of an interchange, characterized in that, include: Speed ​​measuring component (1), the speed measuring component (1) is set at the starting point of the deceleration lane of the interchange exit ramp and fixed to the roadside railing; The speed measuring component (1) includes an infrared speed detector (101), which is used to detect the speed of passing vehicles; Warning component (2), the warning component (2) is located in the middle section of the deceleration lane of the interchange exit ramp, the warning component (2) includes a warning unit (201) that can emit a warning signal. The data processing module (3) is used to receive and process the signal of the infrared speed detector (101) and can control the warning unit (201) to issue a warning signal. It also includes a support rod (4), the bottom of which is connected to the bottom surface via a second fixed base (5), and the warning component (2) and the data processing module (3) are both mounted on the support rod (4); The data processing module (3) includes a device housing (302) with a microcontroller (301) embedded inside. A data receiver (303) is fixed on the top of the device housing (302). The data receiver (303) is connected to the infrared speed detector (101) and the microcontroller (301) respectively. The microcontroller (301) is used to process the received signals and can output the warning signal to the warning unit (201). Along the length of the support rod (4), the top of the support rod (4) has at least two crossbeams (202), the crossbeams (202) and the support rod (4) are inserted together; the back of the warning unit (201) is connected to the crossbeams (202) by a clamp; The warning unit (201) uses an LED display screen.

2. The side slip risk warning device at the exit ramp of an interchange according to claim 1, characterized in that, The speed measuring component (1) is located at a distance of 95-225m from the exit of the interchange.

3. A sideslip risk warning device at an interchange exit ramp according to claim 1, characterized in that, The data processing module (3) also includes a chassis (304) that is detachably connected to the support rod (4), and the device housing (302) is installed inside the chassis (304).

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