A road maintenance operation sound and light warning system and method

Abstract

The present invention discloses a sound and light warning system and method for road maintenance operations, and belongs to the technical field of sound and light warning systems for road maintenance operations. It includes an operation enclosure, an electric trolley, a sound and light warning component, a position interaction unit, an on-site sound and light alarm unit, and a remote control device. The control end of the electric trolley is connected to the automatic driving unit, and a warning frame is fixed on the top of the electric trolley; the sound and light warning component includes a support fixed to the inner side of the warning frame; a distance measuring unit, a lane change dot matrix indicator screen, a text dot matrix indicator screen, and a sound and light alarm are fixed on the support from bottom to top in sequence; the distance measuring unit, the lane change dot matrix indicator screen, the text dot matrix indicator screen, and the sound and light alarm are connected to a warning controller; the warning controller is connected to a control panel and a storage unit; the sound and light warning system and method for road maintenance operations of the present invention adopts a dynamic follow-up sound and light warning, which can improve traffic smoothness and the operation safety of road maintenance personnel.

Description

Technical Field

[0001] The present invention specifically relates to a sound and light warning system and method for road maintenance operations, and belongs to the technical field of sound and light warning systems for road maintenance operations. Background Art

[0002] After long-term use, roads need to be maintained. When highway tunnels are maintained, the working environment of maintenance personnel is dangerous due to factors such as dim lighting and geographical environment. The traditional way is to place anti-collision piles with reflective markers in front and behind the maintenance work. The reflective markers can remind drivers to drive carefully ahead. However, placing anti-collision piles with reflective markers cannot serve as a reminder for operators. For this reason, China Patent Publication No.: CN115369788A discloses a road maintenance operation sound and light warning system and method. Through this system, vehicles can be reminded not to enter, and when vehicles approach or enter the maintenance area, an alarm can be issued in time, so that the staff can avoid in time and reduce the occurrence of dangerous situations. Another example is China Patent Authorization Announcement No.: CN112942169B discloses an intelligent sound and light warning system and method for road maintenance operations, the system comprising sound and light alarm anti-collision piles and vehicle detectors; when a vehicle is closer to a construction area, the sound and light alarm piles will use high-frequency sound and light alarms to remind personnel in the construction area "be careful when a vehicle is passing by", and when the vehicle gradually moves away, the sound and light alarms will gradually decrease; this can effectively remind maintenance personnel to pay attention to safety and drivers to slow down, but the above-mentioned sound and light warning systems are static and fixed in position. When the driver finds that he is approaching the operation area, the length left for the driver to change lanes is insufficient, and the driver needs to slow down to wait for the right time to change lanes, which is likely to cause traffic congestion, and when the distance is insufficient, it is easy to cause the vehicle to emergency brake or collide with traffic cones. Summary of the invention

[0003] In order to solve the above problems, the present invention proposes a road maintenance operation sound and light warning system and method, which adopts dynamic follow-up sound and light warning to improve traffic smoothness and the operation safety of road maintenance personnel.

[0004] The road maintenance operation sound and light warning system of the present invention comprises:

[0005] An operation fence, which is composed of a plurality of traffic cones and is arranged outside the road maintenance area. The operation fence forms an operation circle outside the road maintenance area to remind oncoming vehicles to avoid the road maintenance area;

[0006] An electric car, wherein the control end of the electric car is connected to an automatic driving unit, and a warning frame is fixed on the top of the electric car; emergency obstacle avoidance probes connected to the automatic driving unit are fixed at both ends of the electric car, and the automatic driving unit can control the electric car to automatically drive forward or backward in a certain lane; when the electric car encounters an obstacle, the emergency obstacle avoidance probe can capture the obstacle to prevent the electric car from colliding with the obstacle;

[0007] The sound and light warning component includes a support fixed to the inner side of the warning frame; a distance measuring unit, a lane change dot matrix indicator screen, a text dot matrix indicator screen and a sound and light alarm are fixed on the support in order from bottom to top; the distance measuring unit, the lane change dot matrix indicator screen, the text dot matrix indicator screen and the sound and light alarm are connected to a warning controller; the warning controller is connected to a control panel and a storage unit;

[0008] A position interaction unit, the position interaction unit includes a first sensing array and a first wireless transmitting unit fixed to the side of the electric trolley and connected to the warning controller; also includes an emergency control unit and a second wireless transmitting unit arranged in the same lane of the work enclosure; the emergency control unit includes an emergency control controller, the emergency control controller is connected to a second sensing array and a low-position transmitting unit; the emergency control unit is installed at a safety monitoring position close to a road maintenance area, and the second wireless transmitting unit is installed at a guide stop position; the first sensing array and the second wireless transmitting unit are inductively interacted; the first sensing array also interacts inductively with the low-position transmitting unit; the The first wireless transmitting unit and the second sensing array sense and interact with each other; after receiving the signal, the second sensing array determines whether it is the signal sent by the second wireless transmitting unit or the signal sent by the low-position transmitting unit in combination with the tracking value of the electric vehicle; the first wireless transmitting unit, the second wireless transmitting unit and the low-position transmitting unit are infrared or laser transmitting units, and the first sensing array and the second sensing array are infrared or laser receiving arrays that receive the signals sent by the infrared or laser transmitting units; the safety monitoring position is set at a distance of 20 to 50 meters from the road maintenance area; the guide stop position is set at a distance of 1000 to 2000 meters from the road maintenance area;

[0009] An on-site sound and light alarm unit is arranged at the road maintenance area; the on-site sound and light alarm unit is wirelessly connected with the temporary control controller; after the second sensing array receives the signal, the temporary control controller sends an alarm message to the on-site sound and light alarm unit, and the on-site sound and light alarm unit is a device for warning maintenance workers in advance, reminding maintenance workers to avoid danger in time, and giving maintenance workers sufficient time to avoid danger;

[0010] A remote control device, wherein the remote control device is connected to the automatic driving unit, the warning controller and the temporary control controller respectively. The remote control device can control the automatic driving unit to move forward, backward, change lanes and brake, and the instructions of the remote control device are the highest limited level instructions; the remote control device can also send direct alarm instructions or cancel alarm instructions to the warning controller and the temporary control controller; thereby controlling the text dot matrix indicator screen to temporarily control / cancel control, and the on-site sound and light alarm unit to alarm / cancel alarm;

[0011] Furthermore, the control panel is provided with a lane change button and a distance rise and fall adjustment button; the lane change button includes a left lane change button, a right lane change button and two side lane change buttons.

[0012] Furthermore, the text dot matrix indicator screen adopts two lines of display, the upper line displays: road construction ahead XXm; the lower line displays: changing lanes to YY lane; XX is an adjustable tracking value; YY is one of left side, right side and both sides.

[0013] Furthermore, the sizes of the lane change dot matrix indicator screen and the text dot matrix indicator screen are set so that when a safe distance is maintained between the vehicle and the electric vehicle, the direction of the arrow on the lane change dot matrix indicator screen and the text on the text dot matrix indicator screen can be observed.

[0014] Furthermore, the automatic driving unit includes a driving controller, the driving controller is connected to a navigation tracking unit, the navigation tracking unit is a laser radar sensing unit or a tracking unit, the laser radar sensing unit can realize forward driving or backward driving in the corresponding lane; when the tracking unit is working, the electric car is controlled to drive in advance through a remote control device, and the driving trajectory is pre-recorded, and the driving trajectory can be tracked when used later;

[0015] A road maintenance operation sound and light warning method, using a road maintenance operation sound and light warning system, the method is specifically as follows:

[0016] S1. Installation of system components: First, set up the operation fence outside the road maintenance area, then sequentially set up the emergency control unit, the second wireless transmission unit and the on-site sound and light alarm unit;

[0017] S2, sound and light warning component setting, initial setting of the sound and light warning component through the control panel;

[0018] S3, the electric trolley is aligned by transporting the electric trolley to the second wireless transmitting unit, or controlling the electric trolley to travel to the second wireless transmitting unit through a remote control device, so that the first sensing array is aligned with the second wireless transmitting unit. When the first sensing array detects the signal transmitted by the second wireless transmitting unit, the electric trolley is initially aligned, and the sound and light warning preparation is completed;

[0019] S4, sound and light warning and vehicle following. When a vehicle approaches the electric car and is detected by the distance measuring unit, the warning controller sends a signal to the automatic driving unit, and the automatic driving unit starts. When the distance measuring unit detects that the vehicle has entered a safe distance, the automatic driving unit controls the electric car to drive synchronously. The distance measuring unit obtains the distance measurement data in real time, calculates the tracking value in real time, and refreshes the tracking value to the text dot matrix indicator screen in real time.

[0020] S5, tracking reset and alarm. When the ranging unit signal is lost during the movement of the electric car, it means that the vehicle in front has merged into other lanes. At this time, the warning controller sends a signal to the automatic driving unit. The automatic driving unit drives the electric car to brake and stop first, and then drives in the opposite direction. The electric car moves at a uniform speed toward the second wireless transmitting unit. When the ranging unit detects the signal again, the step S4 process is executed. When the electric car is moving, the ranging unit does not detect the signal until the first sensing array receives the signal sent by the second wireless transmitting unit. The electric car stops moving and continues to monitor whether there is an oncoming vehicle.

[0021] When the electric car is moving, the ranging unit signal is not lost, and it travels to the second sensing array. The second sensing array receives the signal sent by the first wireless transmitting unit, and the temporary control controller sends an alarm signal to the on-site sound and light alarm unit, which issues an on-site alarm, informing the road maintenance personnel to avoid danger in time. At the same time, the first sensing array receives the signal sent by the low-level transmitting unit, and the first sensing array sends a signal to the corresponding IO port of the warning controller. At this time, the warning controller temporarily controls the text dot matrix indicator screen, and the text dot matrix indicator screen continues to display: Please brake; and controls the electric car to continue to slow down until it brakes and stops within the set time. When the reset button is pressed on the remote control device, the on-site sound and light alarm unit alarm and the text dot matrix indicator screen control are cancelled.

[0022] Furthermore, the sound and light warning component is specifically set up as follows: when setting up, first determine the lane where the road maintenance area is located, then select a lane change button through the control panel, and after the warning controller obtains the lane change instruction, it uses the lane change instruction as an index to retrieve the voice segment, text data segment and arrow indication data segment that match it from the storage unit; then the voice segment is sent to the sound and light alarm for voice playback, the text data segment is sent to the text dot matrix indicator screen for display, and the arrow indication data segment is sent to the lane change dot matrix indicator screen; thereby, the arrow is dynamically displayed; then, the actual distance between the road maintenance area and the guide stop position is calculated, and by triggering the distance lifting and lowering adjustment button, the initial distance of the tracking value is set to the actual distance, and displayed through the text dot matrix indicator screen.

[0023] Furthermore, the automatic driving unit controls the synchronous driving process of the electric car as follows: a distance and speed association table is built into the warning controller, and the distance measuring unit obtains the distance between the vehicle and the electric car in real time. After the warning controller obtains the distance, it uses the distance as an index to retrieve the speed association table to obtain the speed of the electric car, and sends the speed to the automatic driving unit, and the automatic driving unit controls the electric car to respond; the real-time calculation and tracking value process is as follows: first determine the direction of vehicle movement, when the electric car moves to the side of the road maintenance area, obtain the driving speed and driving time of the electric car, and subtract the product of the driving speed and driving time from the tracking value of the initial distance to obtain the real-time tracking value; when the electric car stops, record the tracking value of the current stop point; when the electric car moves to the side away from the road maintenance area, obtain the driving speed and driving time of the electric car, and add the product of the driving speed and driving time to the tracking value of the current stop point to obtain the real-time tracking value; when the electric car drives to the first sensing array and the second wireless transmitting unit are aligned, the tracking value is reset to the initial distance to complete the distance correction.

[0024] Compared with the prior art, the road maintenance operation sound and light warning system and method of the present invention adopts dynamic following sound and light warning for vehicles coming from the lane corresponding to the road maintenance operation area to prompt lane change, thereby providing drivers with sufficient lane change time and avoiding problems such as slowing down to wait for lane change, emergency braking and collision with traffic cones, thereby improving traffic smoothness and the operating safety of road maintenance personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the connection structure of each module of the road maintenance operation sound and light warning system of the present invention.

[0026] Figure 2 This is a structural schematic diagram of the electric vehicle of the present invention located at the second wireless transmitting unit.

[0027] Figure 3 It is a structural schematic diagram of the electric vehicle of the present invention located at the remote control unit.

[0028] Figure 4 It is a structural schematic diagram of the sound and light warning component of the present invention.

[0029] Figure 5 It is a schematic diagram of the installation structure of the electric vehicle and the sound and light warning assembly of the present invention.

[0030] Figure 6 The present invention is a schematic diagram of the process flow of the sound and light warning method for road maintenance operations.

[0031] Figure 7 The figure is a schematic diagram of the process of setting the sound and light warning assembly of the present invention.

[0032] Figure 8 The figure is a schematic diagram of the process flow of the automatic driving unit of the present invention controlling the synchronous driving of the electric vehicle.

[0033] Fig. 9 It is a schematic diagram of the real-time calculation and tracking numerical flow of the present invention.

[0034] Figure numerals: 1. work enclosure, 2. electric trolley, 3. warning frame, 4. emergency obstacle avoidance probe, 5. support, 6. distance measuring unit, 7. lane change dot matrix indicator screen, 8. text dot matrix indicator screen, 9. sound and light alarm, 10. first sensing array, 11. first wireless transmitting unit, 12. emergency control unit, 13. second wireless transmitting unit, 14. on-site sound and light alarm unit. DETAILED DESCRIPTION

[0035] Example:

[0036] like Figures 1 to 9 The road maintenance operation sound and light warning system shown includes:

[0037] An operation enclosure 1, the operation enclosure 1 is composed of a plurality of traffic cones, the operation enclosure 1 is arranged outside the road maintenance area, and the operation enclosure 1 forms an operation circle outside the road maintenance area to remind oncoming vehicles to avoid the road maintenance area;

[0038] An electric car 2, wherein the control end of the electric car 2 is connected to the automatic driving unit, and a warning frame 3 is fixed on the top of the electric car 2; emergency obstacle avoidance probes 4 connected to the automatic driving unit are fixed at both ends of the electric car 2, and the automatic driving unit can control the electric car 2 to automatically drive forward or backward in a certain lane; when the electric car 2 encounters an obstacle, the emergency obstacle avoidance probe 4 can capture the obstacle to prevent the electric car 2 from colliding with the obstacle;

[0039] The sound and light warning component includes a support 5 fixed to the inner side of the warning frame 3; a distance measuring unit 6, a lane change dot matrix indicator screen 7, a text dot matrix indicator screen 8 and a sound and light alarm 9 are fixed on the support 5 in order from bottom to top; the distance measuring unit 6, the lane change dot matrix indicator screen 7, the text dot matrix indicator screen 8 and the sound and light alarm 9 are connected to a warning controller; the warning controller is connected to a control panel and a storage unit;

[0040] A position interaction unit, the position interaction unit includes a first sensing array 10 and a first wireless transmitting unit 11 fixed to the side of the electric trolley 2 and connected to the warning controller; it also includes an emergency control unit 12 and a second wireless transmitting unit 13 arranged in the same lane of the operation enclosure 1; the emergency control unit 12 includes an emergency control controller, the emergency control controller is connected to a second sensing array and a low-position transmitting unit; the emergency control unit 12 is installed at a safety monitoring position close to the road maintenance area, and the second wireless transmitting unit 13 is installed at a guide stop position; the first sensing array 10 and the second wireless transmitting unit 13 are inductively interacted; the first sensing array 10 also interacts with the low-position transmitting unit inductively The first wireless transmitting unit 11 and the second sensing array sense and interact with each other; after receiving the signal, the second sensing array determines whether it is a signal sent by the second wireless transmitting unit 13 or a signal sent by the low-position transmitting unit in combination with the tracking value of the electric car 2; the first wireless transmitting unit 11, the second wireless transmitting unit 13 and the low-position transmitting unit are infrared or laser transmitting units, and the first sensing array 10 and the second sensing array are infrared or laser receiving arrays for receiving signals sent by the infrared or laser transmitting units; the safety monitoring position is set at a distance of 20 to 50 meters from the road maintenance area; the guide stop position is set at a distance of 1000 to 2000 meters from the road maintenance area;

[0041] An on-site sound and light alarm unit 14 is provided at the road maintenance area; the on-site sound and light alarm unit 14 is wirelessly connected to the temporary control controller; after the second sensing array receives the signal, the temporary control controller sends an alarm message to the on-site sound and light alarm unit 14, and the on-site sound and light alarm unit 14 is a device for warning maintenance workers in advance, reminding maintenance workers to avoid danger in time, and giving maintenance workers sufficient time to avoid danger;

[0042] A remote control device, wherein the remote control device is connected to the automatic driving unit, the warning controller and the temporary control controller respectively. The remote control device can control the automatic driving unit to move forward, backward, change lanes and brake, and the instructions of the remote control device are the highest limited level instructions; the remote control device can also send direct alarm instructions or cancel alarm instructions to the warning controller and the temporary control controller; thereby controlling the text dot matrix indicator screen 8 to temporarily control / cancel control, and the on-site sound and light alarm unit 14 to alarm / cancel alarm;

[0043] The control panel is provided with a lane change button and a distance rise and fall adjustment button; the lane change button includes a left lane change button, a right lane change button and lane change buttons on both sides.

[0044] The text dot matrix indicator screen 8 uses two lines of display, the upper line displays: road construction ahead XXm; the lower line displays: changing lanes to lane YY; XX is an adjustable tracking value; YY is one of left, right and both sides.

[0045] The sizes of the lane-changing dot matrix indicator screen 7 and the text dot matrix indicator screen 8 are set such that when a safe distance is maintained between the vehicle and the electric vehicle 2, the arrow direction on the lane-changing dot matrix indicator screen 7 and the text on the text dot matrix indicator screen 8 can be observed.

[0046] The automatic driving unit includes a driving controller, which is connected to a navigation tracking unit, which is a laser radar sensing unit or a tracking unit; the laser radar sensing unit can realize forward or backward driving in the corresponding lane; when the tracking unit is working, the electric car is controlled to drive in advance through a remote control device, and the driving trajectory is pre-recorded, and the driving trajectory can be tracked during later use.

[0047] A road maintenance operation sound and light warning method, using a road maintenance operation sound and light warning system, the method is specifically as follows:

[0048] S1, installation of system components, first, laying out the operation enclosure 1 outside the road maintenance area, then laying out the emergency control unit 12, the second wireless transmission unit 13 and the on-site sound and light alarm unit 14 in sequence;

[0049] S2, sound and light warning component setting, initial setting of the sound and light warning component through the control panel;

[0050] S3, the electric car 2 is aligned by carrying the electric car 2 to the second wireless transmitting unit 13, or controlling the electric car 2 to travel to the second wireless transmitting unit 13 through a remote control device, so that the first sensing array 10 is aligned with the second wireless transmitting unit 13. When the first sensing array 10 detects the signal transmitted by the second wireless transmitting unit 13, the electric car 2 is initially aligned, and the sound and light warning preparation is completed;

[0051] S4, sound and light warning and vehicle following. When a vehicle approaches the electric car 2 and is detected by the distance measuring unit 6, the warning controller sends a signal to the automatic driving unit, and the automatic driving unit starts. When the distance measuring unit 6 detects that the vehicle enters a safe distance, the automatic driving unit controls the electric car 2 to travel synchronously. The distance measuring unit 6 obtains the distance measurement data in real time, calculates the tracking value in real time, and refreshes the tracking value to the text dot matrix indicator screen 8 in real time.

[0052] S5, tracking reset and alarm. When the distance measuring unit 6 loses the signal during the movement of the electric car 2, it means that the vehicle in front has merged into other lanes. At this time, the warning controller sends a signal to the automatic driving unit. The automatic driving unit drives the electric car 2 to brake and stop first, and then drives in the opposite direction. The electric car 2 moves at a uniform speed toward the second wireless transmitting unit 13. When the distance measuring unit 6 detects the signal again, the step S4 process is executed. When the electric car 2 is moving, the distance measuring unit 6 does not detect the signal until the first sensing array 10 receives the signal sent by the second wireless transmitting unit 13. Then the electric car 2 stops moving and continues to monitor whether there is an oncoming vehicle.

[0053] When the electric car 2 is moving, the signal of the distance measuring unit 6 is not lost, and it travels to the second sensing array. The second sensing array receives the signal sent by the first wireless transmitting unit 11, and the temporary control controller sends an alarm signal to the on-site sound and light alarm unit 14, and the on-site sound and light alarm unit 14 issues an on-site alarm; informs the road maintenance personnel to avoid danger in time; at the same time, the first sensing array 10 receives the signal sent by the low-level transmitting unit, and the first sensing array 10 gives the corresponding IO port signal to the warning controller. At this time, the warning controller temporarily controls the text dot matrix indicator screen 8, and the text dot matrix indicator screen 8 continues to display: Please brake; and controls the electric car 2 to continue to slow down until it brakes and stops within the set time; when the remote control device presses the reset button, the on-site sound and light alarm unit 14 alarm and the text dot matrix indicator screen 8 control are canceled.

[0054] The sound and light warning component is specifically set up as follows: when setting up, first determine the lane where the road maintenance area is located, then select a lane change button through the control panel, and after the warning controller obtains the lane change instruction, it uses the lane change instruction as an index to retrieve the voice segment, text data segment and arrow indication data segment that match it from the storage unit; then send the voice segment to the sound and light alarm 9 for voice playback, send the text data segment to the text dot matrix indication screen 8 for display, and send the arrow indication data segment to the lane change dot matrix indication screen 7; thereby dynamically displaying the arrow; then, calculate the actual distance between the road maintenance area and the guide stop position, and by triggering the distance lifting and lowering adjustment button, set the initial distance of the tracking value to the actual distance, and display it through the text dot matrix indication screen 8.

[0055] The process of the automatic driving unit controlling the synchronous driving of the electric car 2 is as follows: a distance and speed association table is built into the warning controller, and the distance measuring unit 6 obtains the distance between the vehicle and the electric car 2 in real time. After the warning controller obtains the distance, it uses the distance as an index to retrieve the speed association table, obtains the speed of the electric car 2, and sends the speed to the automatic driving unit, and the automatic driving unit controls the electric car 2 to respond; the real-time calculation and tracking value process is as follows: first determine the direction of vehicle movement, and when the electric car 2 moves to the side of the road maintenance area, obtain the driving speed and Driving time, and subtract the product of the driving speed and the driving time from the tracking value of the initial distance to obtain a real-time tracking value; when the electric trolley 2 stops, the tracking value of the current stopping point is recorded; when the electric trolley 2 moves to the side away from the road maintenance area, the driving speed and driving time of the electric trolley 2 are obtained, and the tracking value of the current stopping point is added to the product of the driving speed and the driving time to obtain a real-time tracking value; when the electric trolley 2 drives to the position where the first sensing array 10 and the second wireless transmitting unit 13 are aligned, the tracking value is reset to the initial distance to complete the distance correction.

[0056] The above embodiments are only preferred implementations of the present invention, so any equivalent changes or modifications made according to the structures, features and principles described in the scope of application of the present invention are included in the scope of application of the present invention.

Claims

1. A road maintenance operation sound and light warning system, characterized in that: include An operation enclosure, the operation enclosure is composed of a plurality of traffic cones and is arranged outside the road maintenance area; An electric trolley, wherein the control end of the electric trolley is connected to the automatic driving unit, a warning frame is fixed on the top of the electric trolley; emergency obstacle avoidance probes connected to the automatic driving unit are fixed at both ends of the electric trolley; The sound and light warning component includes a support fixed to the inner side of the warning frame; a distance measuring unit, a lane change dot matrix indicator screen, a text dot matrix indicator screen and a sound and light alarm are fixed on the support in order from bottom to top; the distance measuring unit, the lane change dot matrix indicator screen, the text dot matrix indicator screen and the sound and light alarm are connected to the warning controller; The warning controller is connected to a control panel and a storage unit; A position interaction unit, the position interaction unit includes a first sensing array and a first wireless transmitting unit fixed to the side of the electric trolley and connected to the warning controller; also includes an emergency control unit and a second wireless transmitting unit arranged in the same lane of the working enclosure; the emergency control unit includes an emergency control controller, the emergency control controller is connected to a second sensing array and a low-position transmitting unit; the emergency control unit is installed at a safety monitoring position close to a road maintenance area, and the second wireless transmitting unit is installed at a guide stop position; the first sensing array and the second wireless transmitting unit are inductively interacted; the first sensing array also inductively interacts with the low-position transmitting unit; the first wireless transmitting unit and the second sensing array are inductively interacted; An on-site sound and light alarm unit, which is arranged at the road maintenance area; the on-site sound and light alarm unit is wirelessly connected to the emergency control controller; A remote control device, wherein the remote control device is respectively connected to the automatic driving unit, the warning controller and the emergency control controller; When a vehicle approaches the electric car and is detected by the ranging unit, the warning controller sends a signal to the automatic driving unit, and the automatic driving unit starts. When the ranging unit detects that the vehicle has entered a safe distance, the automatic driving unit controls the electric car to drive synchronously. The ranging unit obtains the ranging data in real time, calculates the tracking value in real time, and refreshes the tracking value to the text dot matrix indicator screen in real time. When the electric car is moving, if the ranging unit signal is lost, it means that the vehicle in front has merged into other lanes. At this time, the warning controller sends a signal to the automatic driving unit, and the automatic driving unit drives the electric car to brake and stop first, and then drives in the opposite direction. The electric car moves at a uniform speed toward the side of the second wireless transmitting unit. When the electric car is moving, the ranging unit does not detect the signal until the first sensing array receives the signal sent by the second wireless transmitting unit. The electric car stops moving and continues to monitor whether there is an oncoming vehicle. When the electric car is moving, the ranging unit signal is not lost, and it travels to the second sensing array. The second sensing array receives the signal sent by the first wireless transmitting unit, and the temporary control controller sends an alarm signal to the on-site sound and light alarm unit, which issues an on-site alarm, informing the road maintenance personnel to avoid danger in time. At the same time, the first sensing array receives the signal sent by the low-level transmitting unit, and the first sensing array sends a signal to the corresponding IO port of the warning controller. At this time, the warning controller temporarily controls the text dot matrix indicator screen, and the text dot matrix indicator screen continues to display: Please brake; And control the electric car to continue to slow down until it brakes to a stop within the set time; when the reset button is pressed on the remote control device, the on-site sound and light alarm unit alarm and the text dot matrix indicator screen control are cancelled.

2. The road maintenance operation sound and light warning system according to claim 1, characterized in that: The control panel is provided with a lane change button and a distance rise and fall adjustment button; the lane change button includes a left lane change button, a right lane change button and lane change buttons on both sides.

3. The road maintenance operation sound and light warning system according to claim 1, characterized in that: The text dot matrix indicator screen adopts upper and lower lines for display, the upper line displays: road construction ahead XXm; the lower line displays: lane change to YY lane; XX is an adjustable tracking value; YY is one of left side, right side and both sides.

4. The road maintenance operation sound and light warning system according to claim 1, characterized in that: The sizes of the lane-changing dot matrix indicator screen and the text dot matrix indicator screen are set so that when a safe distance is maintained between the vehicle and the electric vehicle, the direction of the arrow on the lane-changing dot matrix indicator screen and the text on the text dot matrix indicator screen can be observed.

5. The road maintenance operation sound and light warning system according to claim 1, characterized in that: The automatic driving unit includes a driving controller, the driving controller is connected to a navigation tracking unit, and the navigation tracking unit is a lidar perception unit or a tracking unit.

6. A road maintenance operation sound and light warning method, using the road maintenance operation sound and light warning system as claimed in any one of claims 1 to 5, characterized in that: The method is specifically as follows: S1. Installation of system components: First, set up the operation fence outside the road maintenance area, then sequentially set up the emergency control unit, the second wireless transmission unit and the on-site sound and light alarm unit; S2, sound and light warning component setting, initial setting of the sound and light warning component through the control panel; S3, the electric trolley is aligned by transporting the electric trolley to the second wireless transmitting unit, or controlling the electric trolley to travel to the second wireless transmitting unit through a remote control device, so that the first sensing array is aligned with the second wireless transmitting unit. When the first sensing array detects the signal transmitted by the second wireless transmitting unit, the electric trolley is initially aligned, and the sound and light warning preparation is completed; S4, sound and light warning and vehicle following. When a vehicle approaches the electric car and is detected by the distance measuring unit, the warning controller sends a signal to the automatic driving unit, and the automatic driving unit starts. When the distance measuring unit detects that the vehicle has entered a safe distance, the automatic driving unit controls the electric car to drive synchronously. The distance measuring unit obtains the distance measuring data in real time, calculates the tracking value in real time, and refreshes the tracking value to the text dot matrix indicator screen in real time; S5, tracking reset and alarm. When the ranging unit signal is lost during the movement of the electric car, it means that the vehicle in front has merged into other lanes. At this time, the warning controller sends a signal to the automatic driving unit. The automatic driving unit drives the electric car to brake and stop first, and then drives in the opposite direction. The electric car moves at a uniform speed toward the second wireless transmitting unit. When the ranging unit detects the signal again, the step S4 process is executed. When the electric car is moving, the ranging unit does not detect the signal until the first sensing array receives the signal sent by the second wireless transmitting unit. The electric car stops moving and continues to monitor whether there is an oncoming vehicle. When the electric car is moving, the ranging unit signal is not lost, and it travels to the second sensing array. The second sensing array receives the signal sent by the first wireless transmitting unit, and the temporary control controller sends an alarm signal to the on-site sound and light alarm unit, which issues an on-site alarm, informing the road maintenance personnel to avoid danger in time. At the same time, the first sensing array receives the signal sent by the low-level transmitting unit, and the first sensing array sends a signal to the corresponding IO port of the warning controller. At this time, the warning controller temporarily controls the text dot matrix indicator screen, and the text dot matrix indicator screen continues to display: Please brake; And control the electric car to continue to slow down until it brakes to a stop within the set time; when the reset button is pressed on the remote control device, the on-site sound and light alarm unit alarm and the text dot matrix indicator screen control are cancelled.

7. The road maintenance operation sound and light warning method according to claim 6, characterized in that: The sound and light warning component is specifically set up as follows: when setting up, first determine the lane where the road maintenance area is located, then select a lane change button through the control panel, and after the warning controller obtains the lane change instruction, it uses the lane change instruction as an index to retrieve the voice segment, text data segment and arrow indication data segment that match it from the storage unit; then send the voice segment to the sound and light alarm for voice playback, send the text data segment to the text dot matrix indicator screen for display, and send the arrow indication data segment to the lane change dot matrix indicator screen; thereby dynamically displaying the arrow; then, calculate the actual distance between the road maintenance area and the guide stop position, and by triggering the distance lifting and lowering adjustment button, set the initial distance of the tracking value to the actual distance, and display it through the text dot matrix indicator screen.

8. The road maintenance operation sound and light warning method according to claim 6, characterized in that: The process of the automatic driving unit controlling the synchronous driving of the electric car is as follows: a distance and speed association table is built into the warning controller, and the distance measuring unit obtains the distance between the vehicle and the electric car in real time. After the warning controller obtains the distance, it uses the distance as an index to retrieve the speed association table to obtain the speed of the electric car, and sends the speed to the automatic driving unit, and the automatic driving unit controls the electric car to respond; the process of real-time calculation of the tracking value is as follows: first determine the direction of vehicle movement, when the electric car moves to the side of the road maintenance area, obtain the driving speed and driving time of the electric car, and subtract the product of the driving speed and driving time from the tracking value of the initial distance to obtain the real-time tracking value; when the electric car stops, record the tracking value of the current stop point; when the electric car moves to the side away from the road maintenance area, obtain the driving speed and driving time of the electric car, and add the product of the driving speed and driving time to the tracking value of the current stop point to obtain the real-time tracking value; when the electric car drives to the first sensing array and the second wireless transmitting unit are aligned, the tracking value is reset to the initial distance to complete the distance correction.

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