CN114973713A - An intelligent early warning system and method for preventing accidental entry for highway reconstruction and expansion projects - Google Patents

Abstract

The invention provides an intelligent early warning system for preventing inadvertent intrusion of highway reconstruction and expansion projects. The sensor is installed on the reconstruction and expansion highway, and the built-in laser radar and multi-target millimeter-wave radar are used to detect vehicles that may intrude into the construction operation control area. Speed, vehicle type, traffic flow on the road, lane occupancy rate are monitored and identified; three levels of warning thresholds are set in the sensor, and the sound and light alarm for early warning, warning shoulder light, early warning drive away are set in the sensor through wireless transmission. The stroboscopic sign is linked and controlled and a graded alarm signal is issued; the background of the system is connected with the sensor to record the detection-related data. The invention also provides an intelligent early warning method for preventing inadvertent entry for highway reconstruction and expansion projects. Compared with other protection facilities, the invention reduces the accident rate of vehicles entering the construction operation control area by an average of 60%, and the accuracy rate of alarming the construction personnel after the vehicle enters the construction operation control area is 98%, which significantly reduces the traffic of reconstruction and expansion projects. Safety risks and accident losses.

Description

An intelligent early warning system and method for preventing accidental entry for highway reconstruction and expansion projects

technical field

The invention relates to the technical field of traffic facilities, in particular to an intelligent early warning system and method for preventing inadvertent entry for highway reconstruction and expansion projects.

Background technique

By the end of 2020, the total mileage of expressways in my country exceeded 160,000 kilometers, ranking first in the world. However, with the increase of traffic flow year by year, the existing expressway network can no longer meet the increasing traffic demand, and more and more reconstruction and expansion projects have appeared. Compared with new construction projects, highway reconstruction and expansion projects usually adopt the method of "construction while opening to traffic". The traffic organization is complex and changeable, and the mutual interference between construction and operation is serious. During the construction of a highway reconstruction and expansion project in a province, there were 1,057 accidents involving collisions with fixed objects and breaking into the construction operation control area, causing serious casualties and property losses, and the safety situation was extremely severe. However, the current accident prevention technology for passing vehicles entering the work area by mistake is still not perfect, the lack of effective early warning devices, and the lack of multi-scenario applicability of the active early warning system. Specifically:

Problem 1: The accident prevention technology is not yet perfect. The existing early warning equipment and the technology used do not have the ability to accurately, long-distance, and sub-regional identification of dangerous vehicles, and perform remote classification warning and drive away functions. It often happens that the vehicle enters the construction operation control area, or the vehicle passes normally in the adjacent area but sends out an alarm signal, and the effect of active early warning is poor; the existing alarm equipment does not have the function of grading alarm, and cannot be used for different alarm scenarios. The vehicle or person issues an alarm signal.

Problem 2: There is a lack of effective early warning devices. Conventional warnings, warning signs, signs and other temporary traffic safety facilities only display fixed content. Drivers of passing vehicles usually cannot observe them in a timely and effective manner. When entering the construction operation control area, it is not possible to issue a warning signal to the driver in time; when an accident occurs when a vehicle breaks into the construction operation control area, there is a lack of facilities to accurately identify the accident vehicle and issue an effective escape warning signal to nearby construction workers.

Problem 3: The multi-scenario applicability of the active early warning system is insufficient, which is manifested in the fact that the existing equipment has a single use scene. The existing equipment only sends an alarm to the vehicle and personnel at a fixed point through its own tweeter, and the alarm coverage is small. The equipment is single, and for complex scenarios such as the transition of the central separation belt and the upstream transition area of highway reconstruction and expansion, it cannot meet the needs of long-distance and multi-point alarm information to vehicles and construction workers respectively; the existing equipment does not have the function of collaborative linkage , it is not possible to use the combined networking of a large number of alarm devices according to the alarm needs of a specific scene.

SUMMARY OF THE INVENTION

In order to solve the above problems, the present invention aims to propose an intelligent early warning system and method for preventing inadvertent intrusion for highway reconstruction and expansion projects. , lane occupancy rate, etc. are monitored and identified. According to the set three-level warning thresholds, through wireless transmission, the linkage control of sound and light alarms, alarm shoulder lights and early warning drive stroboscopic signs is realized, and graded alarm signals are issued. The system records the detection data of the sensor in the background.

In order to achieve the above object, the technical scheme of the present invention is achieved in this way:

An intelligent early warning system for preventing inadvertent entry for highway reconstruction and expansion projects, comprising a sensor, an audible and visual alarm, an alarm shoulder light, an early warning drive away stroboscopic sign and a system background, the sensor is installed on the reconstruction and expansion highway, The built-in lidar and multi-target millimeter-wave radar monitor and identify the speed, vehicle type, traffic flow and lane occupancy rate of vehicles that may intrude into the construction work control area; three levels of early warning are set in the sensor. The threshold value is linked with the sound and light alarms, alarm shoulder lights, and early warning drive stroboscopic signs for early warning through wireless transmission, and sends out graded alarm signals; the system background is connected to the sensor for communication to record detection-related data.

Further, the multi-target millimeter-wave radar obtains a three-level early warning standard based on time and space characteristics by using the early warning distance and speed and the lidar monitoring threshold, and using the mapping relationship between the speed, distance and monitoring width index parameters and the alarm time.

Further, the early warning drive away stroboscopic sign includes a first-level early warning drive away stroboscopic sign and a second-level early warning drive away stroboscopic sign, and the millimeter-wave radar is set with a first-level early warning distance and speed. When the vehicle meets the first-level early warning distance and speed at the same time, it will be sent to the first-level early warning to drive away the stroboscopic sign; the millimeter-wave radar is set with a second-level early warning distance and speed. When the millimeter-wave radar recognizes the vehicle and meets the second-level early warning Distance and speed will be sent to secondary warning to drive away the strobe sign.

Further, the laser radar scanning monitoring length, by setting the set scanning monitoring length, when the accidental vehicle appears in the laser radar scanning area, the third-level alarm information is sent to the sound and light alarm and the alarm shoulder lamp to inform the construction. The workers immediately evacuated the scene.

Further, the audible and visual alarms are arranged near the construction workers, the alarm shoulder lights are arranged on the shoulders of the construction workers, and the warning and drive away stroboscopic signs are arranged on the roadside and inside the closed lane cone.

Further, the sensor is equipped with a control panel, and the control panel is provided with the detection width of the millimeter-wave radar, the first-level early warning distance and speed of the millimeter-wave radar, the second-level early warning distance and speed of the millimeter-wave radar, and the scanning and monitoring length of the laser radar, And set up with millimeter wave radar, alarm shoulder lights and sound and light alarm switch button.

In order to achieve the above purpose, the present invention also provides an intelligent early warning method for preventing inadvertent intrusion for highway reconstruction and expansion projects, using the above-mentioned intelligent early warning system for inadvertent intrusion prevention for highway reconstruction and expansion projects, specifically comprising the following steps:

S1. Determine the location of the sensor layout according to the layout form of the on-site construction operation control area;

S2. Set the monitoring direction of the multi-target millimeter-wave radar of the sensor to the reverse traffic flow to continuously scan and monitor the traffic conditions in the warning area;

S3. Set the lidar monitoring direction of the sensor to continuous monitoring along the direction of the cone barrel of the upstream transition zone;

S4. According to the needs of on-site monitoring, set the monitoring width of the perceptron multi-target millimeter-wave radar, the first-level early warning drive-away threshold, the second-level early-warning drive-away threshold, and the lidar monitoring length threshold;

S5. According to the needs of on-site eviction warning, erect a first-level warning stroboscopic sign A;

S6. Lay out the second-level warning and drive away the stroboscopic sign B;

S7. Arrange the sound and light alarms near the construction workers, and hang the alarm shoulder lights on the shoulders of the construction workers;

S8. When the sensor recognizes that the vehicle continues to approach the upstream transition area without changing lanes, and reaches the first-level early warning drive away standard, it first sends a drive away warning signal to sign A, and the evergreen arrow mode changes to a red cross strobe mode, prompting The vehicle changes lanes; when the vehicle does not change lanes and is close to the upstream transition area and reaches the second-level early warning drive away standard, the sensor sends a warning signal to sign B, and the evergreen arrow mode changes to a red cross strobe mode to prompt the vehicle to change lanes in time ; When the vehicle breaks into the construction operation control area without changing lanes for some reason, the sensor lidar immediately recognizes it, triggers the three-level early warning standard, and the sensor sends a signal to the sound and light alarm and the alarm shoulder lamp, and then prompts the operation. The personnel are evacuated in time; the system background collects statistics on the vehicle intrusion time, location, speed and equipment operation status, analyzes the characteristics of road intrusion traffic accidents, provides the basis for on-site protection and traffic control, and monitors the equipment operation status .

Further, the lidar monitoring length threshold in the step S4 is determined according to the actual situation on site, and the length threshold is the distance between the position of the sensor and the end point of the transition zone; the monitoring width of the multi-target millimeter wave radar can be used to distinguish the target. The monitored target lane; the first and second warning drive-away thresholds are achieved by setting the distance and speed of the vehicle distance sensor. When the passing vehicle enters the set monitoring and warning range threshold and its speed exceeds the set speed threshold, that is, It can trigger the sensor to drive away the strobe sign alarm function to the early warning.

Further, the minimum set value of the second-level early warning drive-away threshold should be set according to the most unfavorable situation, that is, the driver fails to change lanes after receiving the second-level drive-away signal, but takes deceleration measures and stops driving in the transition. For the situation before the cone barrel, the calculation method is as follows:

S ₂ is the minimum recommended value of the "distance" set value in the sensor's secondary early warning threshold, V ₂ is the "speed" set value in the sensor's secondary early warning threshold, and t ₂ is the passing vehicle triggering the sensor's secondary alarm After the time required for the driver to take braking measures, a vehicle decelerates on average.

Further, the first-level warning in the step S5 drives away the stroboscopic sign A through the form of a bracket and is arranged on the right side of the road in the direction of the reverse traffic flow of the sensor, so that the stroboscopic sign of the sign is facing the direction of the vehicle, and the warning is provided. The farthest position away from the strobe sign distance sensor can be determined according to the following formula:

L ₁ =S ₁ -V ₁ ·t ₁

In the formula, L ₁ is the farthest distance between the first-level warning and the stroboscopic sign and the sensor, S ₁ is the set value of "distance" in the first-level warning threshold of the sensor, and V ₁ is the first-level warning threshold of the sensor. The set value of "speed", t ₁ is the time required for the driver to observe the change of the sign mode after the passing vehicle triggers the first-level alarm of the sensor.

Beneficial effects: Compared with other protection facilities, the accident rate of vehicles entering the construction work control area is reduced by an average of 60%, and the accuracy rate of alarming the construction personnel after the vehicle enters the construction work control area is 98%, which significantly reduces the accident rate. The traffic safety risks and accident losses of the expansion project have effectively improved the level of traffic safety risk pre-control in the reconstruction and expansion project, which is of great significance to ensuring the safety of people's lives and properties.

Description of drawings

The accompanying drawings constituting a part of the present invention are used to provide further understanding of the present invention, and the exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

Fig. 1 is the functional principle diagram of the intelligent early warning system for preventing inadvertent break-in for highway reconstruction and expansion projects according to the embodiment of the present invention;

Fig. 2 is the sensor function module diagram of the intelligent early warning system for preventing inadvertent entry for highway reconstruction and expansion projects according to the embodiment of the present invention;

Fig. 3 is the application schematic diagram (normal state and accident state) of the intelligent early warning system for preventing accidental entry for highway reconstruction and expansion project according to the embodiment of the present invention;

FIG. 4 is a main flow chart of an intelligent early warning method for preventing inadvertent break-in for highway reconstruction and expansion projects according to an embodiment of the present invention.

Detailed ways

It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict.

The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

Example 1

See Figure 1-3: An intelligent early warning system for preventing inadvertent entry into highway reconstruction and expansion projects, including sensors, sound and light alarms, alarm shoulder lights, early warning drive away stroboscopic signs, and the background of the system. The sensors are installed On the reconstructed and expanded highway, the built-in lidar and multi-target millimeter-wave radar are used to monitor and identify the speed and type of vehicles that may intrude into the construction work control area, as well as the traffic flow and lane occupancy on the road; There are three levels of early warning thresholds, which are linked with the sound and light alarms, alarm shoulder lights, and early warning drive stroboscopic signs for early warning through wireless transmission, and send out graded alarm signals; the system background is connected to the sensor for communication. For recording inspection-related data.

The sensor of this embodiment is equipped with a laser radar and a multi-target millimeter-wave radar, which can effectively monitor and identify the speed and type of vehicles that may enter the construction work control area, as well as the traffic flow and lane occupancy on the road. The three-level early warning thresholds are determined, and through wireless transmission, the linkage control of sound and light alarms, alarm shoulder lights and early warning drive stroboscopic signs is realized, and graded alarm signals are issued, and the detection data of the sensor is recorded through the system background. Multi-level intelligent early warning for road reconstruction and expansion projects.

It should be noted that the sensor in this embodiment includes a central processing unit, a switch module, a communication module, a multi-target millimeter-wave radar, a laser radar, a data storage module, an early warning threshold parameter setting module, and a power supply module. The laser radar equipped with the sensor can effectively detect the distance of 150m, and can realize 360° angle adjustment. The laser radar rays are launched along the boundary of the transition section of the construction operation control area, and the information of vehicles entering the control area can be obtained; the effective detection distance of the millimeter wave radar can be Up to 280m, the millimeter-wave radar is aimed at the lane, and information such as the speed and position of the vehicles passing in the lane can be obtained.

It should be noted that the system background of this embodiment receives traffic and accident data and equipment operation data detected by the sensor through the 4G/5G network, and realizes automatic analysis of accident characteristics and road traffic flow in a certain time period and road section. Features to provide decision-making basis for later on-site protection and control.

In a specific example, the multi-target millimeter-wave radar uses the early warning distance and speed and the lidar monitoring threshold, and uses the mapping relationship between the speed, distance and monitoring width index parameters and the alarm time, and obtains three based on time and space characteristics. level warning standards.

In a specific example, the early warning stroboscopic signs include a first-level early-warning stroboscopic sign and a second-level early-warning stroboscopic sign, and the millimeter-wave radar is set with a first-level early warning distance and speed. When the wave radar recognizes that the vehicle meets the first-level warning distance and speed at the same time, it will send it to the first-level warning to drive away the stroboscopic sign; the millimeter-wave radar is set with a second-level early warning distance and speed. When the millimeter-wave radar recognizes the vehicle at the same time When the second-level warning distance and speed are met, it will be sent to the second-level warning to drive away the stroboscopic sign.

In a specific example, the laser radar scanning monitoring length, by setting the set scanning monitoring length, when the vehicle intrudes into the laser radar scanning area by mistake, the three-level alarm information is sent to the sound and light alarm, the alarm shoulder. lights, and inform construction workers to evacuate the site immediately.

In a specific example, the audible and visual alarms are set near the construction workers, the alarm shoulder lights are set on the shoulders of the construction workers, and the warning drive stroboscopic signs are set on the roadside and inside the closed lane cone.

The sound and light alarm device and the alarm shoulder lamp of this embodiment receive the three-level alarm evacuation signal from the sensor;

The sound and light alarm emits red and blue flashing lights and high-pitched alarm sounds, prompting the operators to evacuate in time. The sound and light alarm will continue to send out an alarm message for 1 minute, and the construction workers can manually terminate the alarm at any time;

The alarm shoulder light uses vibration, alarm sound and red and blue flashes to remind operators to evacuate in time. The alarm shoulder light will continue to send out an alarm message for 1 minute, and construction workers can manually terminate the alarm at any time.

By receiving the first-level and second-level early-warning and driving-away signals from the sensor, the sign changes from the evergreen arrow mode to the red cross strobe mode to remind the vehicle to change lanes in time. When the vehicle leaves, the sign changes from a red cross stroboscopic pattern to an evergreen arrow pattern. Both modes have strong visibility at night and during the day.

In a specific example, the sensor is equipped with a control panel, and the control panel is provided with the detection width of millimeter-wave radar, the first-level early warning distance and speed of millimeter-wave radar, the second early-warning distance and speed of millimeter-wave radar, and the laser radar. Scanning and monitoring length, and equipped with millimeter wave radar, alarm shoulder light and sound and light alarm switch button.

To sum up, the intelligent early warning system for preventing inadvertent entry in this embodiment has three early warning levels, which are the first-level and second-level vehicle evacuation early warning, and the third-level construction worker evacuation early warning. The hierarchical early warning function is mainly realized by the designed and developed perceptron. The effective detection distance of the multi-target millimeter-wave radar integrated by the perceptron can reach 280m, and the effective detection distance of the lidar can reach 150m. By setting the multi-target millimeter-wave radar monitoring width, distance, The laser radar monitoring distance and other data parameters can realize the accurate identification of long-distance vehicles and the identification of vehicles entering the operation control area, which can be used as the basis for the calculation of the early warning classification standard for the perceptron classification early warning model. Through the development of early warning and stroboscopic signs arranged in advance, and receiving the alarm signal from the sensor, by changing the stroboscopic mode, the vehicle can be prompted to take timely lane change measures from a long distance.

The early warning drive away stroboscopic signs developed in this embodiment can be placed on the roadside and the inside of the closed lane cone. By receiving the first-level and second-level drive-away alarm signals from the sensor, the signs change from evergreen arrow mode to The red cross strobe mode can attract the driver's attention in time to prompt the vehicle to change lanes in time. When a vehicle breaks into the construction work control area, the sensor lidar can accurately identify and trigger a three-level warning, and send a three-level alarm signal to the construction alarm shoulder lamp and sound and light alarm through wireless communication, prompting the operator in time. get away.

The sensor of this embodiment is provided with a control panel, which can realize the closing and opening of multi-target millimeter-wave radar, laser radar, early warning drive away stroboscopic signage alarm function, alarm shoulder light alarm function, and sound and light alarm alarm function. LoRa The communication protocol performs collaborative linkage and free networking for the networked alarm equipment, covering a maximum distance of 10km. According to the needs of multi-scenario alarms, the alarm function of early warning drive away stroboscopic signage, the alarm function of alarm shoulder light, and the alarm function of sound and light alarm can be turned off and on. Long-distance, multi-level alarm function.

Example 2

In order to achieve the above-mentioned purpose, referring to Fig. 4: the present embodiment also provides a kind of anti-inadvertent intelligent early warning method for highway reconstruction and expansion projects, using the above-mentioned anti-inadvertent intelligent early warning system for highway reconstruction and expansion projects, specifically Include the following steps:

S1. Determine the location of the sensor layout according to the layout form of the on-site construction operation control area;

In this embodiment, the sensor is arranged at the intersection of the cone barrel and the wave beam guardrail in the upstream transition zone.

S2. Set the monitoring direction of the multi-target millimeter-wave radar of the sensor to the reverse traffic flow to continuously scan and monitor the traffic conditions in the warning area;

S3. Set the lidar monitoring direction of the sensor to continuous monitoring along the direction of the cone barrel of the upstream transition zone;

S4. According to the needs of on-site monitoring, set key parameters such as the monitoring width of the perceptron multi-target millimeter-wave radar, the first-level early warning drive-away threshold, the second-level early-warning drive-away threshold, and the lidar monitoring length threshold; the lidar in the step S4 The monitoring length threshold is determined according to the actual situation of the site, and its length threshold is the distance between the position of the sensor and the end point of the transition zone; the monitoring width of multi-target millimeter wave radar can be used to distinguish the target lane monitored by the target; the first and second warning The drive away threshold is achieved by setting the distance and speed of the vehicle distance sensor. When the passing vehicle enters the set monitoring and warning range threshold and its speed exceeds the set speed threshold, the sensor can be triggered to drive away the stroboscopic sign. Alarm function, the minimum setting value of the second-level early warning drive-away threshold should be set according to the most unfavorable situation, that is, the driver fails to change lanes after receiving the second-level drive-away signal, but takes deceleration measures and stops driving in the transition For the situation before the cone barrel, the calculation method is as follows:

S ₂ is the minimum recommended value of the "distance" set value in the sensor's secondary early warning threshold, V ₂ is the "speed" set value in the sensor's secondary early warning threshold, and t ₂ is the passing vehicle triggering the sensor's secondary alarm After the time required for the driver to take braking measures, a vehicle decelerates on average.

It should be noted that, in the actual application on site, the first-level early warning eviction threshold and the second-level early warning eviction threshold can be comprehensively determined according to the road speed limit, traffic composition, etc. At the same time, in order to make the vehicle have enough time to take measures such as deceleration and lane change after receiving the second-level warning signal to prevent rushing into the construction work control area, this embodiment provides the minimum value of the second-level warning "distance" threshold Therefore, under the premise of ensuring the safety of road construction personnel, the excessive occupation of the road will not affect the normal use of the road to the maximum extent.

S5. According to the needs of the on-site driving away warning, erect the first-level warning and driving away stroboscopic sign A; the first-level warning and driving away stroboscopic sign A in the step S5 is arranged on the right side of the road in the direction of the reverse traffic flow of the sensor in the form of a bracket, Make the stroboscopic sign of the sign plate facing the direction of the vehicle, and the farthest position of the early warning drive away from the stroboscopic signage distance sensor can be determined according to the following formula:

L ₁ =S ₁ -V ₁ ·t ₁

In the formula, L ₁ is the farthest distance between the first-level warning and the stroboscopic sign and the sensor, S ₁ is the set value of "distance" in the first-level warning threshold of the sensor, and V ₁ is the first-level warning threshold of the sensor. The set value of "speed", t ₁ is the time required for the driver to observe the change of the sign mode after the passing vehicle triggers the first-level alarm of the sensor.

In practical applications, in order to enhance the effect of warning and driving away the passing vehicles, the first-level warning and driving away stroboscopic signs can be arranged in sequence along the direction of the traffic flow as needed. The multiple first-level warning drive away stroboscopic signs laid out can receive the warning drive away signal from the sensor at the same time, and have a synchronous stroboscopic frequency.

S6. Lay out the second-level warning and drive away the stroboscopic sign B;

It should be noted that the second-level warning drive away stroboscopic sign B is set in the middle of the closed lane inside the upstream transition area, so that the stroboscopic sign of the sign is facing the passing vehicles. The second-level warning drive away stroboscopic signs can also be arranged in multiple blocks in the direction of the transition area as needed, and at the same time receive the warning drive away signal from the sensor, and have a synchronous stroboscopic frequency.

S7. Arrange the sound and light alarms near the construction workers, and hang the alarm shoulder lights on the shoulders of the construction workers;

S8. When the sensor recognizes that the vehicle continues to approach the upstream transition area without changing lanes, and reaches the first-level early warning drive away standard, it first sends a drive away warning signal to sign A, and the evergreen arrow mode changes to a red cross strobe mode, prompting The vehicle changes lanes; when the vehicle does not change lanes and is close to the upstream transition area and reaches the second-level early warning drive away standard, the sensor sends a warning signal to sign B, and the evergreen arrow mode changes to a red cross strobe mode to prompt the vehicle to change lanes in time ; When the vehicle breaks into the construction operation control area without changing lanes for some reason, the sensor lidar immediately recognizes it, triggers the three-level early warning standard, and the sensor sends a signal to the sound and light alarm and the alarm shoulder lamp, and then prompts the operation. The personnel are evacuated in time; the system background collects statistics on the vehicle intrusion time, location, speed and equipment operation status, analyzes the characteristics of road intrusion traffic accidents, provides the basis for on-site protection and traffic control, and monitors the equipment operation status .

Through the application of the above early warning method in this embodiment, compared with other protective facilities, the accident rate of vehicles entering the construction work control area is reduced by an average of 60%, and the accuracy rate of alarming the construction personnel after the vehicle enters the construction work control area is 98%. , significantly reducing the traffic safety risks and accident losses of the reconstruction and expansion projects, effectively improving the traffic safety risk pre-control level of the reconstruction and expansion projects, which is of great significance to ensuring the safety of people's lives and property.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (10)

1. a kind of anti-mistake intelligent early warning system for highway reconstruction and expansion project, it is characterized in that, comprise sensor, sound and light alarm, alarm shoulder lamp, early warning drive away strobe sign and system backstage, described sensor is installed On the reconstructed and expanded highway, the built-in lidar and multi-target millimeter-wave radar are used to monitor and identify the speed and type of vehicles that may intrude into the construction work control area, as well as the traffic flow and lane occupancy on the road; There are three levels of early warning thresholds, which are linked with the sound and light alarms, alarm shoulder lights, and early warning drive stroboscopic signs for early warning through wireless transmission, and send out graded alarm signals; the system background is connected to the sensor for communication. For recording inspection-related data. 2. the anti-inadvertent intelligent early warning system for highway reconstruction and expansion project according to claim 1, is characterized in that, described multi-target millimeter wave radar monitors threshold value by early warning distance and speed and laser radar, utilizes speed, distance and By monitoring the mapping relationship between the width index parameter and the alarm time, a three-level early warning standard based on time and space characteristics is obtained. 3. The intelligent early warning system for preventing inadvertent break-in for highway reconstruction and expansion project according to claim 1, is characterized in that, described early warning driving away stroboscopic sign comprises first-level early warning driving off stroboscopic sign and second-level early warning driving away Strobe sign, the millimeter-wave radar is set with a first-level early warning distance and speed, when the millimeter-wave radar recognizes that the vehicle meets the first-level early warning distance and speed at the same time, it will be sent to the first-level early warning to drive away the stroboscopic sign; the millimeter-wave radar The wave radar is set with a second-level warning distance and speed. When the millimeter-wave radar recognizes that the vehicle meets the second-level warning distance and speed at the same time, it will send it to the second-level warning to drive away the stroboscopic sign. 4. the anti-inadvertent intelligent early warning system for highway reconstruction and expansion project according to claim 1, is characterized in that, described laser radar scanning monitoring length, by setting the scanning monitoring length of setting, when the inadvertent vehicle appears in the In the laser radar scanning area, the three-level alarm information is sent to the sound and light alarm and the alarm shoulder light, and the construction workers are informed to immediately evacuate the site. 5. The intelligent early warning system for road reconstruction and expansion project according to claim 1, wherein the sound and light alarm is arranged near the construction worker, and the alarm shoulder lamp is arranged on the shoulder of the construction worker , the warning drive away strobe signs are set on the roadside and the inside of the closed lane cone. 6. The intelligent early warning system for road reconstruction and expansion project according to claim 1, wherein the sensor is equipped with a control panel, and the control panel is provided with a millimeter-wave radar detection width, a millimeter The first-level early warning distance and speed of the wave radar, the second-level early warning distance and speed of the millimeter-wave radar, and the scanning and monitoring length of the lidar are provided with the millimeter-wave radar, the alarm shoulder light and the sound and light alarm switch button. 7. A kind of intelligent early warning method for preventing inadvertent break-in for highway reconstruction and expansion project, it is characterized in that, using the intelligent early-warning system for preventing inadvertent break-in for highway reconstruction and expansion project as described in any one of claims 1-6, specifically comprising The following steps: S1. Determine the location of the sensor layout according to the layout form of the on-site construction operation control area; S2. Set the monitoring direction of the multi-target millimeter-wave radar of the sensor to the reverse traffic flow to continuously scan and monitor the traffic conditions in the warning area; S3. Set the lidar monitoring direction of the sensor to continuous monitoring along the direction of the cone barrel of the upstream transition zone; S4. According to the needs of on-site monitoring, set the monitoring width of the perceptron multi-target millimeter-wave radar, the first-level early warning drive-away threshold, the second-level early-warning drive-away threshold, and the lidar monitoring length threshold; S5. According to the needs of on-site eviction warning, erect a first-level warning stroboscopic sign A; S6. Lay out the second-level warning and drive away the stroboscopic sign B; S7. Arrange the sound and light alarms near the construction workers, and hang the alarm shoulder lights on the shoulders of the construction workers; S8. When the sensor recognizes that the vehicle continues to approach the upstream transition area without changing lanes, and reaches the first-level early warning drive away standard, it first sends a drive away warning signal to sign A, and the evergreen arrow mode changes to a red cross strobe mode, prompting The vehicle changes lanes; when the vehicle does not change lanes and is close to the upstream transition area and reaches the second-level early warning drive away standard, the sensor sends a warning signal to sign B, and the evergreen arrow mode changes to a red cross strobe mode to prompt the vehicle to change lanes in time ; When the vehicle breaks into the construction operation control area without changing lanes for some reason, the sensor lidar immediately recognizes it, triggers the three-level early warning standard, and the sensor sends a signal to the sound and light alarm and the alarm shoulder lamp, and then prompts the operation. The personnel are evacuated in time; the system background collects statistics on the vehicle intrusion time, location, speed and equipment operation status, analyzes the characteristics of road intrusion traffic accidents, provides the basis for on-site protection and traffic control, and monitors the equipment operation status . 8. The intelligent early warning method for road reconstruction and expansion project according to claim 7, characterized in that, the laser radar monitoring length threshold in the step S4 is determined according to the actual situation on site, and its length threshold is a sensor The distance between the location of the transition zone and the end point of the transition zone; the monitoring width of the multi-target millimeter wave radar can be used to distinguish the target lanes monitored by the target; the first and second-level warning drive away thresholds are realized by setting the distance and speed of the vehicle distance sensor , when the passing vehicle enters the set monitoring and warning range threshold and its speed exceeds the set speed threshold, the sensor can be triggered to drive away the stroboscopic sign warning function. 9. The intelligent early warning method for road reconstruction and expansion project according to claim 8, characterized in that, the minimum setting value of the second-level early warning and driving away threshold value should be set according to the most unfavorable situation, that is, the driver In the scenario where the driver fails to change lanes after receiving the second-level drive-away signal, but takes deceleration measures and stops driving in front of the cone barrel in the transition zone, the calculation method is shown in the following formula:

S ₂ is the minimum recommended value of the "distance" set value in the sensor's secondary early warning threshold, V ₂ is the "speed" set value in the sensor's secondary early warning threshold, and t ₂ is the passing vehicle triggering the sensor's secondary alarm After the time required for the driver to take braking measures, a vehicle decelerates on average. 10. The intelligent early warning method for road reconstruction and expansion project according to claim 7, characterized in that, the first-level early warning in the step S5 drives off the stroboscopic sign A by means of a bracket and is arranged on the sensor inverse. On the right side of the road in the direction of traffic flow, make the stroboscopic sign of the sign facing the direction of the vehicle, and the farthest position of the distance sensor from the stroboscopic sign for warning can be determined according to the following formula: L ₁ =S ₁ -V ₁ ·t ₁ In the formula, L ₁ is the farthest distance between the first-level warning and the stroboscopic sign and the sensor, S ₁ is the set value of "distance" in the first-level warning threshold of the sensor, and V ₁ is the first-level warning threshold of the sensor. The set value of "speed", t ₁ is the time required for the driver to observe the change of the sign mode after the passing vehicle triggers the first-level alarm of the sensor.

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