CN107274722A - A kind of traffic safety early warning system and method towards using mobile phone pedestrian - Google Patents

Abstract

The invention provides a traffic safety early warning system for pedestrians using mobile phones, which includes a mobile terminal installed in the pedestrian's mobile phone; The warning lights are issued when giving instructions; the roadside unit installed on the side of the pedestrian crossing at intersections and road sections analyzes whether there will be conflicts between vehicles and pedestrians based on the dynamic information of pedestrians and vehicles in the radiation area, and provides information to those who may have conflicts. The pedestrian's mobile terminal, the vehicle's on-board unit, and the pedestrian crosswalk warning light send an early warning command. Installing the system of the present invention at intersections without signal control and crosswalks in road sections can safely and efficiently realize information sharing between drivers and pedestrians crossing the street, establish a unified safety warning evaluation standard, and make up for possible dangers caused by sensory differences between drivers and pedestrians.

Description

A traffic safety early warning system and method for pedestrians using mobile phones

technical field

The invention relates to the fields of intelligent transportation, Internet of Vehicles and traffic safety, in particular to a traffic safety early warning system and method for pedestrians using mobile phones.

Background technique

In unsignal-controlled intersections or crosswalks, drivers and pedestrians often have traffic accidents due to misinterpretation of the intentions of both parties and miscalculation of the speed and distance of both parties. There are more and more pedestrians, and relevant studies have shown that pedestrians use mobile phones when crossing the road to distract pedestrians, ignore road and vehicle conditions, and often miss the best response time when there is an accident. The proportion of pedestrian traffic accidents to the total number of pedestrian accidents is increasing year by year. Relevant road traffic regulations strictly prohibit drivers from using mobile phones while driving, but there are no clear requirements for pedestrians to use mobile phones. The above situation has brought great challenges to the safety of pedestrians at intersections and crosswalks without signal control.

Contents of the invention

The technical problem to be solved by the present invention is to provide a traffic safety early warning system and method for pedestrians using mobile phones, so as to improve the safety of pedestrians using mobile phones when crossing the street.

The technical solution adopted by the present invention to solve the above technical problems is: a traffic safety early warning system for pedestrians using mobile phones, characterized in that it includes:

The mobile terminal installed in the mobile phone of the pedestrian is used to detect whether the mobile phone of the pedestrian is in use, and report the dynamic information of the pedestrian to the roadside unit in the radiation area, receive the early warning command sent by the roadside unit, and send out a prompt signal;

The on-board unit installed in the vehicle is used to record the dynamic information of the vehicle and transmit it to the roadside unit in the radiation area in real time, receive the early warning command sent by the roadside unit, and send out a reminder signal;

The pedestrian crosswalk warning lights installed on the pedestrian crosswalk are used to emit warning light when receiving the early warning instruction sent by the roadside unit;

The roadside unit installed on the side of the pedestrian crossing at intersections and road sections is used to analyze whether there will be conflicts between vehicles and pedestrians based on the dynamic information of pedestrians sent by all mobile terminals in the radiation area and the dynamic information of vehicles sent by all on-board units. And send early warning instructions to the mobile terminals of pedestrians who may have conflicts, the vehicle-mounted units of vehicles, and the warning lights of pedestrian crossings.

According to the above scheme, the roadside unit includes:

The sensor monitoring module is used to detect whether pedestrians and vehicles using mobile phones have entered the radiation area;

The information collection and processing module is used to analyze whether there will be conflicts between vehicles and pedestrians according to the dynamic information of all pedestrians and vehicles in the radiation area, and generate early warning instructions when conflicts occur;

The wireless transmission module is used for sending and receiving information with the mobile terminal, the vehicle unit and the pedestrian crosswalk warning lights in the radiation area.

According to the above scheme, the vehicle-mounted unit includes:

The information collection module is used to obtain real-time dynamic information of the vehicle, including the speed of the vehicle, the driving direction of the vehicle, the position of the lane where the vehicle is located, and the distance from the pedestrian crossing;

The information processing module is used to collect real-time vehicle dynamic information and issue, receive and execute early warning instructions;

The wireless transmission module is used for sending and receiving information with the roadside unit.

According to the above scheme, the mobile terminal includes:

The information acquisition module is used to establish contact with the positioning module of the mobile phone, determine whether pedestrians use mobile phones, and obtain real-time dynamic information of pedestrians using mobile phones, including walking speed, pedestrian movement direction and pedestrian lane position;

The information processing execution module is used to collect real-time dynamic information of pedestrians using mobile phones and issue, receive and execute early warning instructions;

The wireless transmission module is used for sending and receiving information with the roadside unit.

According to the above-mentioned scheme, described pedestrian crosswalk warning light comprises:

The energy storage type light emitting module is used to send out the warning light after receiving the warning instruction;

The wireless transmission module is used for sending and receiving information with the roadside unit.

According to the above scheme, the roadside unit specifically analyzes whether the vehicle and the pedestrian will conflict in the following manner:

With the pedestrian as the origin, the pedestrian's traveling direction is the X-axis, and the direction perpendicular to the X-axis is the Y-axis to establish a coordinate system. According to the dynamic information of pedestrians and vehicles, the estimated collision time between pedestrians and vehicles is calculated. L is the straight-line distance between the vehicle and the pedestrian, V _c is the moving speed of the vehicle, V _r is the moving speed of the pedestrian, α is the angle between the connecting line between the vehicle and the pedestrian and the X axis, and β is the angle between the traveling direction of the vehicle and the pedestrian;

According to the real-time dynamic information of the vehicle, calculate the reaction time required for the vehicle to avoid collision _t1 is the reaction time of the driver, _t2 is the time from when the driver steps on the brake to the start of the brake, _t3 is the time required for the brake force to increase to the maximum, _v0 is the initial velocity of the vehicle, and _amax is the maximum deceleration of the vehicle;

Assume the degree of safety SE=T _c /T _b , if SE>1.5, there is no collision between the pedestrian and the vehicle, and it is in a safe state; if 1<SE<1.5, there is conflict between the pedestrian and the vehicle.

According to the above scheme, the pedestrian crossing warning lights are installed at a distance of 0.5 meters from the edge line of the pedestrian crossing in the direction of the vehicle, and are arranged in sections, one section is arranged for each lane, and each section of the pedestrian crossing warning lights is separately controlled by the roadside unit.

The early warning method realized by the described traffic safety early warning system for pedestrians using mobile phones is characterized in that: it comprises the following steps:

S1. The mobile terminal installed in the mobile phone of the pedestrian detects whether the mobile phone of the pedestrian is in use, and reports the dynamic information of the pedestrian to the roadside unit in the radiation area;

The on-board unit installed in the vehicle records the dynamic information of the vehicle and transmits it to the roadside unit in the radiation area in real time;

S2. The roadside unit installed on the side of the pedestrian crossing at the intersection and road section analyzes whether there will be conflicts between vehicles and pedestrians according to the dynamic information of pedestrians sent by all mobile terminals in the radiation area and the dynamic information of vehicles sent by all vehicle-mounted units;

S3. When a conflict may occur, the roadside unit sends an early warning command to the mobile terminal of the pedestrian, the vehicle-mounted unit of the vehicle, and the warning light of the pedestrian crossing;

S4. The mobile terminal prompts pedestrians after receiving the early warning command; the vehicle-mounted unit prompts the driver after receiving the early warning command; the pedestrian crosswalk warning light installed on the crosswalk receives the early warning command and emits a warning light.

According to the above method, the S2 roadside unit specifically analyzes whether the vehicle and the pedestrian will conflict in the following manner:

With the pedestrian as the origin, the pedestrian's traveling direction is the X-axis, and the direction perpendicular to the X-axis is the Y-axis to establish a coordinate system. According to the dynamic information of pedestrians and vehicles, the estimated collision time between pedestrians and vehicles is calculated. L is the straight-line distance between the vehicle and the pedestrian, V _c is the moving speed of the vehicle, V _r is the moving speed of the pedestrian, α is the angle between the connecting line between the vehicle and the pedestrian and the X axis, and β is the angle between the traveling direction of the vehicle and the pedestrian;

According to the real-time dynamic information of the vehicle, calculate the reaction time required for the vehicle to avoid collision _t1 is the reaction time of the driver, _t2 is the time from when the driver steps on the brake to the start of the brake, _t3 is the time required for the brake force to increase to the maximum, _v0 is the initial velocity of the vehicle, and _amax is the maximum deceleration of the vehicle;

Assume the degree of safety SE=T _c /T _b , if SE>1.5, there is no collision between the pedestrian and the vehicle, and it is in a safe state; if 1<SE<1.5, there is conflict between the pedestrian and the vehicle.

The beneficial effects of the present invention are as follows: installing the system of the present invention at intersections without signal control and pedestrian crosswalks in road sections can safely and efficiently realize information sharing between drivers and pedestrians crossing the street, establish a unified safety early warning evaluation standard, and can compensate for the sensory perception of drivers and pedestrians. The difference may bring dangers, thereby improving the safety of pedestrians crossing the street with mobile phones; the information can be quickly sent to drivers and pedestrians after processing, so that they have more time to take corresponding safety measures after receiving the warning information.

Description of drawings

Fig. 1 is a structural block diagram of an embodiment of the present invention.

Fig. 2 is a schematic diagram of a real road scene applied by an embodiment of the present invention.

Fig. 3 is a flowchart of a method according to an embodiment of the present invention.

In the figure: 1-roadside unit, 2-vehicle unit, 3-mobile terminal, 4-pedestrian crosswalk warning light.

detailed description

The present invention will be further described below in conjunction with specific examples and accompanying drawings.

The rapid development of intelligent transportation provides technical means to solve traffic problems. Among them, vehicle-road coordination technology has become a popular technology and research focus in the field of international intelligent transportation, and European and American countries have also achieved phased research results. Vehicle-road coordination is the use of advanced wireless communication and new-generation Internet technologies to implement vehicle-vehicle and vehicle-road dynamic real-time information interaction in an all-round way, and to carry out vehicle active safety control and road coordination on the basis of full-time and spatial dynamic traffic information collection and fusion. Management, fully realize the effective coordination of people, vehicles and roads, so as to form a safe, efficient and environmentally friendly road traffic system. The characteristics of multi-party real-time dynamic information interaction of vehicle-road coordination have laid a foundation for solving the safety problem of mobile phone bow-headed people crossing the street.

The present invention provides a traffic safety early warning system for pedestrians using mobile phones, as shown in Figure 1 and Figure 2, it includes: a mobile terminal 3 installed in the pedestrian's mobile phone, used to detect whether the pedestrian's mobile phone is in use, and send The roadside unit 1 in the radiation area reports the dynamic information of pedestrians, receives the early warning command sent by the roadside unit 1, and sends out a prompt signal; the vehicle-mounted unit 2 installed in the vehicle is used to record the dynamic information of the vehicle and transmit it to the The roadside unit 1 in the radiation area receives the early warning instruction sent by the roadside unit 1 and sends a prompt signal; the pedestrian crosswalk warning light 4 arranged on the pedestrian crosswalk is used to receive the early warning instruction sent by the roadside unit 1. Send out warning lights; the roadside unit installed on the side of pedestrian crossings at intersections and road sections is used to analyze the dynamic information of vehicles and pedestrians based on the dynamic information of pedestrians sent by all mobile terminals in the radiation area and the dynamic information of vehicles sent by all on-board units 2 Whether there will be a conflict, and send an early warning instruction to the mobile terminal 3 of the pedestrian who may conflict, the vehicle-mounted unit 2 of the vehicle, and the warning light 4 of the pedestrian crossing.

The roadside unit includes: a sensor monitoring module, used to detect whether pedestrians and vehicles using mobile phones have entered the radiation area; Information, analyze whether vehicles and pedestrians will conflict, and generate early warning commands when conflicts occur; wireless transmission module, used to send and receive information with mobile terminals, vehicle-mounted units and pedestrian crossing warning lights in the radiation area.

The vehicle-mounted unit includes: an information collection module, used to obtain real-time dynamic information of the vehicle, including the speed of the vehicle, the direction of travel of the vehicle, the position of the lane where the vehicle is located, and the distance from the pedestrian crossing; an information processing module, used to collect the real-time dynamic information of the vehicle and Issue, receive and execute early warning instructions; the wireless transmission module is used to send and receive information with roadside units.

The mobile terminal includes: an information acquisition module, which is used to establish contact with the positioning module provided by the mobile phone, determine whether pedestrians use mobile phones, and obtain real-time dynamic information of pedestrians using mobile phones, including walking speed, pedestrian movement direction and pedestrian's lane Location; information processing execution module, used to collect real-time dynamic information of pedestrians using mobile phones and issue, receive and execute early warning instructions; wireless transmission module, used to send and receive information with roadside units.

The pedestrian crosswalk warning light includes: an energy storage light-emitting module for emitting warning light after receiving an early warning instruction; a wireless transmission module for sending and receiving information with the roadside unit. The pedestrian crossing warning lights are installed at a distance of 0.5 meters from the edge of the pedestrian crossing in the direction of the vehicle, and are arranged in sections. Each lane is arranged in one section, and each section of the pedestrian crossing warning lights is controlled separately by the roadside unit.

The roadside unit specifically analyzes whether the vehicle and the pedestrian will conflict in the following manner:

With the pedestrian as the origin, the pedestrian's traveling direction is the X-axis, and the direction perpendicular to the X-axis is the Y-axis to establish a coordinate system. According to the dynamic information of pedestrians and vehicles, the estimated collision time between pedestrians and vehicles is calculated. L is the straight-line distance between the vehicle and the pedestrian, V _c is the moving speed of the vehicle, V _r is the moving speed of the pedestrian, α is the angle between the connecting line between the vehicle and the pedestrian and the X axis, and β is the angle between the traveling direction of the vehicle and the pedestrian;

According to the real-time dynamic information of the vehicle, calculate the reaction time required for the vehicle to avoid collision _t1 is the reaction time of the driver, _t2 is the time from when the driver steps on the brake to the start of the brake, _t3 is the time required for the brake force to increase to the maximum, _v0 is the initial velocity of the vehicle, and _amax is the maximum deceleration of the vehicle;

Assume the degree of safety SE=T _c /T _b , if SE>1.5, there is no collision between the pedestrian and the vehicle, and it is in a safe state; if 1<SE<1.5, there is conflict between the pedestrian and the vehicle.

Utilize the early warning method that the described traffic safety early warning system for using mobile phone pedestrians realizes, as shown in Figure 3, it comprises the following steps:

S1. The mobile terminal set in the mobile phone of the pedestrian detects whether the mobile phone of the pedestrian is in use, and reports the dynamic information of the pedestrian to the roadside unit in the radiation area; the vehicle-mounted unit set in the vehicle records the dynamic information of the vehicle and transmits it to the mobile phone in real time. Roadside units within the radiation area.

S2. The roadside unit installed on the side of the pedestrian crossing at the intersection and road section analyzes whether there will be conflicts between vehicles and pedestrians according to the dynamic information of pedestrians sent by all mobile terminals in the radiation area and the dynamic information of vehicles sent by all vehicle units. Specifically, analyze whether there will be conflicts between vehicles and pedestrians in the following ways:

With the pedestrian as the origin, the pedestrian's traveling direction is the X-axis, and the direction perpendicular to the X-axis is the Y-axis to establish a coordinate system. According to the dynamic information of pedestrians and vehicles, the estimated collision time between pedestrians and vehicles is calculated. L is the straight-line distance between the vehicle and the pedestrian, V _c is the moving speed of the vehicle, V _r is the moving speed of the pedestrian, α is the angle between the connecting line between the vehicle and the pedestrian and the X axis, and β is the angle between the traveling direction of the vehicle and the pedestrian;

According to the real-time dynamic information of the vehicle, calculate the reaction time required for the vehicle to avoid collision _t1 is the reaction time of the driver, _t2 is the time from when the driver steps on the brake to the start of the brake, _t3 is the time required for the brake force to increase to the maximum, _v0 is the initial velocity of the vehicle, and _amax is the maximum deceleration of the vehicle;

Assume the degree of safety SE=T _c /T _b , if SE>1.5, there is no collision between the pedestrian and the vehicle, and it is in a safe state; if 1<SE<1.5, there is conflict between the pedestrian and the vehicle.

S3. When a conflict may occur, the roadside unit sends an early warning command to the pedestrian's mobile terminal, the vehicle's on-board unit, and the crosswalk warning light.

S4. After the mobile terminal receives the warning instruction, it prompts the pedestrian. It can remind the pedestrian to take safety measures and avoid conflicts through voice and vibration; after the vehicle-mounted unit receives the warning instruction, it reminds the driver, and it can remind the driver to take safety measures through voice and screen information. Avoid conflicts, such as prompting "pedestrians crossing the street ahead, slow down"; the pedestrian crosswalk warning lights installed on the pedestrian crosswalk receive warning instructions and emit warning lights to remind the driver that there are pedestrians crossing the street in this lane by emitting light.

Further, the communication between the roadside unit, the vehicle unit, the mobile terminal and the pedestrian crosswalk warning light adopts 4G, 5G mobile communication or DSRC dedicated short-range communication.

The above embodiments are only used to illustrate the design concept and characteristics of the present invention, and its purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. The protection scope of the present invention is not limited to the above embodiments. Therefore, all equivalent changes or modifications based on the principles and design ideas disclosed in the present invention are within the protection scope of the present invention.

Claims (9)

1. A traffic safety warning system for pedestrians using mobile phones, characterized in that: it includes: The mobile terminal installed in the mobile phone of the pedestrian is used to detect whether the mobile phone of the pedestrian is in use, and report the dynamic information of the pedestrian to the roadside unit in the radiation area, receive the early warning command sent by the roadside unit, and send out a prompt signal; The on-board unit installed in the vehicle is used to record the dynamic information of the vehicle and transmit it to the roadside unit in the radiation area in real time, receive the early warning command sent by the roadside unit, and send out a reminder signal; The pedestrian crosswalk warning lights installed on the pedestrian crosswalk are used to emit warning light when receiving the early warning instruction sent by the roadside unit; The roadside unit installed on the side of the pedestrian crossing at intersections and road sections is used to analyze whether there will be conflicts between vehicles and pedestrians based on the dynamic information of pedestrians sent by all mobile terminals in the radiation area and the dynamic information of vehicles sent by all on-board units. And send early warning instructions to the mobile terminals of pedestrians who may have conflicts, the vehicle-mounted units of vehicles, and the warning lights of pedestrian crossings. 2. The traffic safety warning system for pedestrians using mobile phones according to claim 1, wherein said roadside unit comprises: The sensor monitoring module is used to detect whether pedestrians and vehicles using mobile phones have entered the radiation area; The information collection and processing module is used to analyze whether there will be conflicts between vehicles and pedestrians according to the dynamic information of all pedestrians and vehicles in the radiation area, and generate early warning instructions when conflicts occur; The wireless transmission module is used for sending and receiving information with the mobile terminal, the vehicle unit and the pedestrian crosswalk warning lights in the radiation area. 3. The traffic safety warning system for pedestrians using mobile phones according to claim 1, wherein the vehicle-mounted unit includes: The information collection module is used to obtain real-time dynamic information of the vehicle, including the speed of the vehicle, the driving direction of the vehicle, the position of the lane where the vehicle is located, and the distance from the pedestrian crossing; The information processing module is used to collect real-time vehicle dynamic information and issue, receive and execute early warning instructions; The wireless transmission module is used for sending and receiving information with the roadside unit. 4. The traffic safety warning system for pedestrians using mobile phones according to claim 1, wherein said mobile terminal comprises: The information acquisition module is used to establish contact with the positioning module of the mobile phone, determine whether pedestrians use mobile phones, and obtain real-time dynamic information of pedestrians using mobile phones, including walking speed, pedestrian movement direction and pedestrian lane position; The information processing execution module is used to collect real-time dynamic information of pedestrians using mobile phones and issue, receive and execute early warning instructions; The wireless transmission module is used for sending and receiving information with the roadside unit. 5. The traffic safety early warning system for pedestrians using mobile phones according to claim 1, characterized in that: the pedestrian crossing warning lights include: The energy storage type light emitting module is used to send out the warning light after receiving the warning instruction; The wireless transmission module is used for sending and receiving information with the roadside unit. 6. The traffic safety early warning system for pedestrians using mobile phones according to claim 1, characterized in that: the roadside unit specifically analyzes whether vehicles and pedestrians will conflict in the following manner: With the pedestrian as the origin, the pedestrian's traveling direction is the X-axis, and the direction perpendicular to the X-axis is the Y-axis to establish a coordinate system. According to the dynamic information of pedestrians and vehicles, the estimated collision time between pedestrians and vehicles is calculated. L is the straight-line distance between the vehicle and the pedestrian, V _c is the moving speed of the vehicle, V _r is the moving speed of the pedestrian, α is the angle between the connecting line between the vehicle and the pedestrian and the X axis, and β is the angle between the traveling direction of the vehicle and the pedestrian; According to the real-time dynamic information of the vehicle, calculate the reaction time required for the vehicle to avoid collision _t1 is the reaction time of the driver, _t2 is the time from when the driver steps on the brake to the start of the brake, _t3 is the time required for the brake force to increase to the maximum, _v0 is the initial velocity of the vehicle, and _amax is the maximum deceleration of the vehicle; Assume the degree of safety SE=T _c /T _b , if SE>1.5, there is no collision between the pedestrian and the vehicle, and it is in a safe state; if 1<SE<1.5, there is conflict between the pedestrian and the vehicle. 7. The traffic safety early warning system for pedestrians using mobile phones according to claim 1, characterized in that: the pedestrian crosswalk warning light is installed at a distance of 0.5 meters from the edge line of the pedestrian crosswalk in the direction of the vehicle, and is arranged in sections, One section is arranged for each lane, and the warning lights of each section of pedestrian crossing are separately controlled by the roadside unit. 8. Utilize the early warning method that the traffic safety early warning system of using mobile phone pedestrians as claimed in claim 1 realizes, it is characterized in that: it comprises the following steps: S1. The mobile terminal installed in the mobile phone of the pedestrian detects whether the mobile phone of the pedestrian is in use, and reports the dynamic information of the pedestrian to the roadside unit in the radiation area; The on-board unit installed in the vehicle records the dynamic information of the vehicle and transmits it to the roadside unit in the radiation area in real time; S2. The roadside unit installed on the side of the pedestrian crossing at the intersection and road section analyzes whether there will be conflicts between vehicles and pedestrians according to the dynamic information of pedestrians sent by all mobile terminals in the radiation area and the dynamic information of vehicles sent by all vehicle-mounted units; S3. When a conflict may occur, the roadside unit sends an early warning command to the mobile terminal of the pedestrian, the vehicle-mounted unit of the vehicle, and the warning light of the pedestrian crossing; S4. The mobile terminal prompts pedestrians after receiving the early warning command; the vehicle-mounted unit prompts the driver after receiving the early warning command; the pedestrian crosswalk warning light installed on the crosswalk receives the early warning command and emits a warning light. 9. The early warning method according to claim 8, characterized in that: said S2 roadside unit specifically analyzes whether vehicles and pedestrians will conflict in the following manner: With the pedestrian as the origin, the pedestrian's traveling direction is the X-axis, and the direction perpendicular to the X-axis is the Y-axis to establish a coordinate system. According to the dynamic information of pedestrians and vehicles, the estimated collision time between pedestrians and vehicles is calculated. L is the straight-line distance between the vehicle and the pedestrian, V _c is the moving speed of the vehicle, V _r is the moving speed of the pedestrian, α is the angle between the connecting line between the vehicle and the pedestrian and the X axis, and β is the angle between the traveling direction of the vehicle and the pedestrian; According to the real-time dynamic information of the vehicle, calculate the reaction time required for the vehicle to avoid collision _t1 is the reaction time of the driver, _t2 is the time from when the driver steps on the brake to the start of the brake, _t3 is the time required for the brake force to increase to the maximum, _v0 is the initial velocity of the vehicle, and _amax is the maximum deceleration of the vehicle; Assume the degree of safety SE=T _c /T _b , if SE>1.5, there is no collision between the pedestrian and the vehicle, and it is in a safe state; if 1<SE<1.5, there is conflict between the pedestrian and the vehicle.