Rhombic interchange ramp exit early warning system

Abstract

The utility model relates to a rhombic interchange ramp exit early warning system, which comprises a ground marking induction group arranged in front of an exit ramp shunting point, a vehicle speed warning system arranged at an exit shunting nose point, and an intersection information warning confirmation system arranged at a ramp landing section, the vehicle speed warning system comprises a first power supply, and a radar velocimeter, a single chip microcomputer and a variable information sign which are sequentially arranged along the traffic flow direction; and the intersection information warning confirmation system comprises a second power supply, and an intersection stop line lane information signboard, an infrared laser detection device and a warning marking line at the joint of the elevated section and the ground road landing section which are sequentially arranged along the traffic flow direction. Through a three-level sign system of'guiding, warning and confirming 'arranged at a front exit, more accurate and safer driving guidance is realized, so that the driving requirements of a driver on safe passing and smooth driving-out are met, and the traffic safety of a rhombic interchange exit road section is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of highway traffic safety facilities, in particular to a warning system for the exit of a diamond interchange ramp. Background Art

[0002] Due to its special geometric structure and traffic flow direction, drivers often face problems such as misjudgment and improper vehicle distance control when approaching the exit of a diamond interchange, which increases the risk of traffic accidents. Although the existing road sign system can provide drivers with certain direction guidance, it still has deficiencies in vehicle distance control and real-time traffic information feedback. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a warning system for the exit of a diamond interchange ramp to solve the problems raised in the above background art.

[0004] To solve the above technical problems, the utility model is realized by the following technical measures: A warning system for the exit of a diamond interchange ramp, which includes a ground marking induction group arranged in front of the diversion point of the exit ramp, a vehicle speed warning system arranged at the exit diversion nose point, and an intersection information warning and confirmation system arranged in the landing section of the ramp.

[0005] The vehicle speed warning system includes a first power supply, a radar speed detector, a single-chip microcomputer, and a variable message sign arranged in sequence along the traffic flow direction; both the radar speed detector and the variable message sign adopt a single-column support structure; the radar speed detector is connected to the single-chip microcomputer through a first wireless communication module, and the output signal end of the single-chip microcomputer is connected to the variable message sign through a second wireless communication module. The single-chip microcomputer includes a signal collection module, a signal processing module, and a signal sending module.

[0006] The intersection information warning and confirmation system includes a second power supply, and an intersection stop line lane information sign, an infrared laser detection device, and a warning marking at the connection between the elevated section and the ground road landing section arranged in sequence along the traffic flow direction. The intersection stop line lane information sign adopts a double-cantilever support structure, and an engineering-grade reflective film strip is provided on the outer surface. The content of the information sign is the lane information of the intersection ahead; the infrared laser detection device identifies whether the vehicle queue exceeds the warning marking, and the output signal end is connected to the single-chip microcomputer through a third wireless communication module, and the output signal end of the single-chip microcomputer is connected to the variable message sign through a second wireless communication module. Among them, the variable message sign adopts an LED board, includes an intersection vehicle speed detection module and a warning speed limit module, and the warning marking adopts a yellow reflective hot-melt adhesive coating.

[0007] As an improvement of the present utility model, the ground marking induction group includes a plurality of intersection guiding arrows and corresponding ground text markings, which are respectively arranged at 270 m away from the diversion point, 180 m away from the diversion point, and 90 m away from the diversion point. That is, the ground marking induction group composed of the guiding arrows on the front exit road 270 m in front of the diversion point of the exit ramp, the guiding arrows on the front exit road 180 m in front, the guiding arrows on the front exit road 90 m in front, and the ground text markings corresponding to the guiding arrows. The length of the guiding arrow on the front exit road of the ramp is 6 m, and a reflective hot-melt adhesive coating is used. Diamond-grade reflective film is applied on the multi-layer line-type guiding signs. The height of the ground text marking is 6 m, the width is 2 m, and the longitudinal spacing is 4 m.

[0008] As an improvement of the present utility model, the radar speed detector adopts a TBR-100 mobile high-definition speed detector.

[0009] In the present invention, after comparing the driver's vehicle speed Vi with the theoretical safe speed V0 through a single-chip microcomputer, a control signal is output to give a warning to the driver driving over speed, so that the driver decelerates. As the front eyes of the driver entering the ramp, the present invention can predict in advance whether the queuing vehicles spread to the ramp and affect the driving safety of the ramp vehicles, and improves the traffic efficiency of the exit ramp and the adjacent plane intersection.

[0010] Furthermore, aiming at the fact that drivers often cause dangerous driving behaviors due to untimely and inaccurate information acquisition in the exit section of the diamond interchange highway, the present invention forms a continuous and efficient road guiding sign system by setting up a ground marking induction group, effectively assisting the driver to complete the driving task.

[0011] Furthermore, the present invention adopts a wireless transmission technology, which is convenient to install, has a simple structural design, and a high degree of automation.

[0012] Compared with the prior art, the advantages of the present utility model are as follows:

[0013] By setting up a three-level sign system of "guiding, warning, and confirmation" at the front exit, namely, the "ground marking induction group, vehicle speed warning system, and intersection information warning and confirmation system", more accurate and safe driving guidance is realized, so as to meet the driving needs of the driver to pass safely and drive out smoothly, and ensure the traffic safety of the exit section of the diamond interchange. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model.

[0015] In the drawings:

[0016] Figure 1 This is the structural framework diagram of the detection and warning system described in the present utility model.

[0017] Figure 2 This is the design diagram of the three - level system of the exit warning system described in the present utility model.

[0018] Figure 3 This is the schematic diagram of a single warning board described in the present utility model.

[0019] Explanation of reference numerals in the drawings: 1. Radar speed detector; 2. First wireless communication module; 3. Single - chip microcomputer; 4. Second wireless communication module; 5. Variable message sign; 6. First power supply; 7. Third wireless communication module; 8. Infrared laser detection device; 9. Second power supply; 10. 270m ramp exit guiding marking; 11. 180m ramp exit guiding marking; 12. 90m ramp exit guiding marking; 13. Lane information sign at the intersection stop line; 14. Warning line. Specific implementation mode

[0020] The following is an illustration of the preferred embodiments of the present utility model with reference to the attached drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present utility model and are not intended to limit the present utility model.

[0021] Embodiment 1

[0022] In the embodiment of the present application of the present utility model, please refer to Figure 2 , a diamond interchange exit warning system described in the present utility model includes 3 groups of guiding markings for continuously guiding drivers to the outermost lane, a warning system for prompting drivers of road information ahead and warning drivers to pay attention to vehicle speed, and a road intersection information warning and confirmation system, thus forming a three - level sign system of "guidance, warning, and confirmation".

[0023] In the embodiment of the present application of the present utility model, please refer to Figure 3 , the guiding markings described in the present utility model include 270m ramp exit guiding marking 10, 180m ramp exit guiding marking 11, and 90m ramp exit guiding marking 12. That is, a ground marking induction group composed of the guiding arrows of the exit road ahead 270m before the ramp exit diversion point, the guiding arrows of the exit road ahead 180m, the guiding arrows of the exit road ahead 90m, and the ground text markings corresponding to the guiding arrows. The ground marking induction group can extremely prominently remind drivers of road diversion information and timely and effectively guide drivers to perform lane - changing actions in sequence, effectively avoiding the occurrence of dangerous driving behaviors.

[0024] In the embodiment of the present application of the present utility model, please refer to Figure 1, the vehicle speed warning and intersection warning system of the present utility model includes a radar speed detector 1, a first wireless communication module 2, a single-chip microcomputer 3, a second wireless communication module 4, a variable message sign 5, a first power supply 6, a third wireless communication module 7, an infrared laser detection device 8, a second power supply 9, and a warning line 14. Among them, the infrared laser detection device 8 obtains whether the vehicle crosses the warning line 14, and uses the third wireless communication module 7 to transmit the vehicle queuing data on the ramp to the single-chip microcomputer 3. After processing the information, the single-chip microcomputer 3 stores it as V0. The radar speed detector 1 obtains the driving speed V1 of the vehicle entering the ramp and connects to the single-chip microcomputer 3 using the first wireless communication module 2. The single-chip microcomputer 3 compares the theoretical safe speed V0 with the vehicle speed V1. If V0 > V1, it outputs the current vehicle speed and the section speed limit; if V0 < V1, it outputs the safe vehicle speed, the current vehicle speed, and the words "overspeed and rear-end collision, pay attention to vehicle speed". The single-chip microcomputer 3 connects to the variable message sign 5 using the third wireless communication module. In the present utility model, the first power supply provides energy for the radar speed detector, the first wireless communication module, the single-chip microcomputer, the second wireless communication module 4, and the variable message sign 5, and the second power supply 9 provides energy for the third wireless communication module 7 and the infrared laser detection device 8.

[0025] More specifically, the technical solutions adopted for the technical problems of the present utility model include the following steps:

[0026] Step 1: Obtain the queuing situation of ramp vehicles in real time through the infrared laser detection device 8;

[0027] Step 2: Calculate the theoretical safe speed according to parameters such as the ramp stopping distance margin, ramp slope, and longitudinal friction coefficient;

[0028] Step 3: Obtain the driving speed of the vehicle entering the ramp through the radar speed detector;

[0029] Step 4: Determine whether the vehicle driving speed is greater than the theoretical safe passing speed. If so, the variable message sign 5 displays the safe vehicle speed, the current vehicle speed, and the red words "overspeed and rear-end collision, pay attention to vehicle speed"; otherwise, it only displays the current vehicle speed and the section speed limit.

[0030] Further, the present utility model assumes that the asphalt concrete pavement is in a dry state daily, and the longitudinal friction coefficient is 0.6. If it is detected that the road surface friction coefficient changes due to weather reasons, the corresponding road surface states of wet, rain, snow, and ice slip are multiplied by reduction coefficients of 0.7, 0.45, and 0.3 respectively.

[0031] Further, the information stored in the signal processing module of the present utility model includes the ramp slope and the length from the ramp top to the ramp bottom.

[0032] Further, the formula for the signal processing module of the present utility model to calculate the theoretical safe speed by synthesizing each stored data is as follows:

[0033]

[0034]

[0035] Among them, V0 is the theoretical safe speed of the vehicle when entering the ramp; S is the length from the top to the bottom of the ramp; n is the number of vehicles crossing the warning line; is the length occupied by the waiting vehicles on the ramp. Generally, it is taken as 6 - 12 m. When the vehicle type is not clear, it is generally taken as 9 m; t0 is the reaction time of the driver, generally 0.4 - 1 s; is the longitudinal friction coefficient between the vehicle tire and the road surface, i is the longitudinal slope of the ramp, and g is taken as 9.8 m / s².

[0036] Furthermore, the present utility model obtains the vehicle speed V1 of the exiting vehicle through a radar speed measurement device.

[0037] Furthermore, the signal processing module of the present utility model compares the theoretical safe speed V0 with the vehicle speed V1. If V0 > V1, it outputs the current vehicle speed and the speed limit of the section; if V0 < V1, it outputs the safe vehicle speed, the current vehicle speed, and the words "overspeed and rear-end collision, pay attention to vehicle speed".

[0038] Furthermore, the signal sending module is used to feedback the processing result of the signal processing module to the variable message sign 5 to prompt the driver whether they can pass safely.

[0039] More specifically, the intersection information confirmation sign of the present utility model is the lane information signboard 13 of the intersection stop line. It adopts a double cantilever support structure and is provided with an engineering grade reflective film strip on the outer surface. The content of the information board is the lane information of the intersection ahead. By setting the intersection information confirmation sign before the ramp landing section, it guides the driver to complete lane change before reaching the intersection ahead, reduces the influence degree when merging into the ground main line, and effectively ensures the stability of the traffic flow in this area.

[0040] The beneficial effects of the present utility model are as follows: By setting up a three - level sign system of "guidance, warning, and confirmation" at the front exit, namely "ground marking induction group, vehicle speed warning system, intersection information warning and confirmation system", it realizes more accurate and safe driving guidance, thus meeting the driving needs of drivers to pass safely and drive out smoothly, and ensuring the traffic safety of the exit section of the diamond interchange.

[0041] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "vertical", "upper", "lower", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0042] In the description of the present utility model, it should also be noted that, unless otherwise clearly specified and defined, the terms "arranged", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0043] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A warning system for the ramp exit of a diamond interchange, characterized in that: It includes a ground marking induction group set before the diversion point of the exit ramp, a vehicle speed warning system set at the exit diversion nose point, and an intersection information warning and confirmation system set in the landing section of the ramp. The vehicle speed warning system includes a first power supply (6), a radar speed detector (1), a single-chip microcomputer (3), and a variable message sign (5) arranged in sequence along the traffic flow direction; the intersection information warning and confirmation system includes a second power supply (9), and an intersection stop line lane information sign (13), an infrared laser detection device (8), and a warning marking (14) at the connection between the elevated section and the ground road landing section arranged in sequence along the traffic flow direction.

2. The diamond interchange ramp exit warning system according to claim 1, characterized in that: The ground marking induction group includes multiple intersection guiding arrows and corresponding ground text markings, which are respectively set at 270 m away from the diversion point, 180 m away from the diversion point, and 90 m away from the diversion point.

3. The diamond interchange ramp exit warning system according to claim 1, characterized in that: The radar speed detector (1) adopts a TBR-100 mobile high-definition speed detector.

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