CN111640328B - Zebra crossing safety warning system suitable for vehicle-road collaborative environment - Google Patents
Zebra crossing safety warning system suitable for vehicle-road collaborative environment Download PDFInfo
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Abstract
The invention discloses a zebra crossing safety warning system suitable for a vehicle-road cooperative environment, and aims to solve the problem of insufficient traffic safety early warning capability of a street crossing zebra crossing. The device comprises a monitoring system, a signal control system and a zebra crossing warning lamp group. The monitoring system utilizes a multi-target radar detector to realize real-time synchronous transmission of data through an NTCIP communication protocol, so as to realize real-time identification of traffic events; the signal control system comprises 2 groups of signal control units which respectively control the phase and signal transmission of the LED lamp groups of the street zebra crossing; the zebra crossing warning lamp bank comprises a zebra crossing LED lamp bank and a trample power generation device positioned under the lamp bank, and mechanical energy generated by pedestrians and vehicles on the zebra crossing can be converted into electric energy to independently supply power to the zebra crossing LED lamp bank. The invention can finally solve the problem of insufficient traffic safety early warning capability of the street crossing zebra crossing, and has important practical significance and practical value for guiding the zebra crossing safety warning system taking the establishment of a vehicle speed control and pedestrian warning system as a core.
Description
Technical Field
The invention belongs to the field of traffic management and design engineering, and relates to a zebra crossing safety warning system suitable for a vehicle-road cooperative environment.
Background
The urban road crossing zebra crossing is used as a node for intersection of various traffic flows, and the conflict between vehicles and pedestrians, between vehicles and non-motor vehicles is very serious, so that the traffic safety problem is particularly prominent. According to the investigation and display of traffic safety accidents on urban roads, the traffic flow node accidents frequently occur, the early warning capability of a traffic accident early warning and safety warning system is insufficient, the smooth and safe operation of an intersection traffic system cannot be well met, the development of green traffic of the whole city is limited to a certain extent, and in order to better cope with the frequent traffic accidents of street crossing zebra crossings, a plurality of research results of experts and scholars in the field are successfully landed, so that the technology is converted and applied to the traffic management and control of the street crossing zebra crossings, although the early warning success rate is improved, the great margin is still improved, and the space is perfected.
The intelligent zebra crossing that Russian designer chu gulnikov designed can change its colour under the not good condition of weather, sight, make better the zebra crossing of seeing clearly of pedestrian and passing vehicle. In 2016, the intelligent zebra crossing put into use in Changsha city in China can control the spike flicker of the zebra crossing through the intelligent detection of pedestrians in the intersection area, and prompt a driver to slow down. Other researches on intelligent zebra crossings at home and abroad are similar to the two examples, and the zebra crossing warning system has a single function on the whole, or only carries out safety warning from the perspective of a driver, so that the safety warning effect has a further improved space, the functions are not complete, and a complete system is not formed.
And under the complex condition of road conditions at the intersection, the traffic consciousness of pedestrians and drivers is insufficient, or the reaction is not timely: for example, when a pedestrian crosses a road, the pedestrian lowers his head to play a mobile phone or cannot observe the situation in the lane due to the obstructed view, so that accidents are easy to occur; factors such as fatigue driving of a driver, giving away of pedestrians in a manner not in accordance with regulations, call receiving and making and the like easily cause the phenomena of crossing a stop line to stop, even running a red light and the like. Considering that the time interval from the stimulus response of a driver to the vehicle braking is far longer than the pedestrian response time, and pedestrians cannot acquire dynamic traffic information in a lane in time, the invention designs a zebra crossing safety warning system under the cooperative environment of a vehicle and a road from the perspective of pedestrian safety warning.
Disclosure of Invention
The invention aims to develop and develop a zebra crossing safety warning system suitable for a vehicle-road cooperative environment by utilizing the prior art so as to solve the problem of insufficient safety early warning capability of a zebra crossing.
In order to achieve the purpose, the technical scheme of the invention is as follows: a zebra crossing safety warning system suitable for a vehicle-road cooperative environment is characterized by comprising a monitoring system, a signal control system and a zebra crossing warning lamp set. The monitoring system utilizes the multi-target radar detector to monitor the running conditions of vehicles and pedestrians in real time, and realizes real-time synchronous transmission of data through the NTCIP communication protocol. The signal control system comprises 2 groups of signal control units, wherein the signal control units are used for respectively controlling the phases and signal transmission of zebra crossing LED lamp groups in two directions on a pedestrian crossing; the zebra crossing warning lamp set comprises a zebra crossing LED lamp set and a trample power generation device positioned under the lamp set.
The monitoring system is arranged at a position 15m away from a vehicle stop line of an intersection at the downstream of a traffic flow by using a multi-target radar detector, can simultaneously detect the pedestrian condition of a zebra crossing and the vehicle running condition of each lane at the upstream of the traffic flow, each lane is provided with a detection point, the detection points are connected into a vehicle detection line, and the vehicle detection line is 30m away from the vehicle stop line of the intersection and forms a 90-degree included angle with the road, namely the direction perpendicular to the road. The safety vehicle speed preset value is 50km/h, and when the driving speed of the automobile exceeds the safety vehicle speed preset value, the control unit controls the zebra crossing LED lamp groups corresponding to the lane to be in a red stroboscopic state to warn pedestrians.
The signal control system comprises 2 groups of signal control units, wherein the signal control units are used for respectively controlling the phases and signal transmission of zebra crossing LED lamp groups in two directions on a pedestrian crossing, the signal control units adopt a single-point induction control mode, and when the safe parking sight distance is calculated, except for considering the factors of vehicle brake clearance elimination time, driver reaction time and vehicle full-braking distance, the lamp grabbing time of a non-motor vehicle is counted into the basic reaction time in an intelligent phase program, namely a safe parking sight distance calculation formula:
zebra crossing warning light group total 2 group, lay respectively on the pedestrian crossing, trample power generation facility and lay in zebra crossing LED banks below, every group zebra crossing LED banks includes three rows of LED pilot lamps, every LED pilot lamp diameter 2.7cm, interval 3cm is installed in the middle of every zebra crossing, install toughened glass protective sheath additional on zebra crossing LED banks surface in the installation to access signal lamp phase place, adopt the mode that zebra crossing LED banks and pedestrian signal lamp combine to guide the pedestrian current simultaneously. The treading power generation device cloth comprises a pedal, a powerful magnet, a plurality of groups of conductive coils, an energy storage device, a power transformation device and the like, and independent power supply is carried out on the zebra crossing LED lamp bank by utilizing the treading and vehicle load effects of pedestrians.
As a general inventive concept, in addition to the above, the present invention provides a detailed operation principle thereof, which comprises the steps of:
1. under the condition that the pedestrian passes through the zebra crossing and plays a mobile phone because of lowering the head or the sight is obstructed and runs the red light, the system comprises the following working steps: the multi-target radar detector is arranged at a position 15m away from a vehicle stop line at an intersection at the downstream of a traffic stream, when a traffic light is switched and a pedestrian traffic signal light is red, and when a pedestrian violates a traffic signal indication and passes through a zebra crossing, the monitoring system monitors the traffic condition in the road intersection in real time, judges that the traffic behavior of the pedestrian is an abnormal state, and synchronously transmits the abnormal state to the control system; the control system analyzes and processes the received pedestrian traffic information, dynamically controls the display of the zebra crossing LED lamp sets of the pedestrian crossing where the pedestrian is located, and when the traffic behavior of the pedestrian is determined to be in an abnormal state, the danger possibility that the pedestrian runs the red light to pass through the pedestrian crossing exists, the control unit controls the zebra crossing LED lamp sets of the pedestrian crossing where the pedestrian is located to be in a red stroboscopic state, and the pedestrian is warned to avoid vehicles.
2. The driver causes the condition that the vehicle can not park or even run the red light before the intersection stop line because of factors such as fatigue driving, insufficient conciseness of zebra crossing, and the system working steps include: the multi-target radar detector is arranged at a position 15m away from a vehicle stop line of an intersection at the downstream of a traffic flow, can simultaneously detect the pedestrian condition of a zebra crossing and the vehicle running condition of each lane at the upstream of the traffic flow, each lane is provided with a detection point, the detection points are connected into a vehicle detection line, and the vehicle detection line forms an included angle of 90 degrees with the intersection of 30m away from the vehicle stop line of the intersection and the road, namely the direction perpendicular to the road. The safety vehicle speed preset value is 50km/h, when the traffic lights are switched and pedestrian signal lights are green, when the vehicle running speed exceeds the safety vehicle speed preset value, namely the vehicle speed exceeds 50km/h, the monitoring system carries out real-time monitoring on the vehicle speed of the vehicle detection line, judges that the traffic behavior of the vehicle is in an abnormal state and synchronously transmits the abnormal state to the control system; the control system analyzes and processes the received vehicle information, dynamically controls the display of the road lamp group corresponding to the lane, and controls the zebra crossing LED lamp group corresponding to the lane where the overspeed vehicle is located to be in a red stroboscopic state when the traffic behavior of the vehicle is determined to be in an abnormal state and the dangerous possibility that the vehicle cannot stop at the front of a stop line of an intersection or even run a red light exists, so that the control unit controls the zebra crossing LED lamp group corresponding to the lane where the overspeed vehicle is located to be in the red stroboscopic state, warns pedestrians and avoids the collision between the pedestrians and the vehicle.
3. Under the condition that traffic lights are switched and traffic weak groups (women, children and old people) are still remained on the zebra crossing, the system comprises the following working steps: the multi-target radar detector is arranged at a position 15m away from a vehicle stop line of the intersection at the downstream of the traffic flow, when traffic lights are switched, when a pedestrian stays at the zebra crossing and continues to pass through the intersection, the monitoring system monitors the traffic condition in the road intersection in real time, judges the traffic behavior of the pedestrian to be in an abnormal state and synchronously transmits the abnormal state to the control system; the control system analyzes and processes the received pedestrian traffic information, dynamically controls the display of the zebra crossing LED lamp group of the pedestrian crossing where the pedestrian is located, when the traffic behavior of the pedestrian is determined to be in an abnormal state, the danger possibility that the pedestrian continues to pass through the pedestrian crossing with the unchanged traffic state exists, and the control unit controls the zebra crossing LED lamp group of the pedestrian crossing where the pedestrian is located to be in a red stroboscopic state to remind the pedestrian of waiting for the vehicle to pass.
Compared with the prior art, the invention has the following beneficial effects:
the zebra crossing safety warning system under the cooperative vehicle and road environment provided by the invention is based on the establishment of a vehicle speed detection and pedestrian warning system from the perspective of pedestrians, so that potential safety hazards caused by conflicts between motor vehicles and pedestrians are reduced.
The monitoring system provided by the invention considers three adverse conditions taking warning pedestrians as a core, namely the condition that the pedestrians pass through the zebra crossing and play mobile phones due to head lowering or run red lights due to obstructed sight; the situation that the vehicle cannot stop at the front of a stop line at an intersection or even run a red light is caused by factors such as fatigue driving, insufficient consciousness of a courtesy zebra crossing and the like of a driver; when the traffic lights are switched, traffic weak groups (women, children and old people) still stay on the zebra crossing. Because the time interval from the stimulus response of a driver to the vehicle braking is far longer than the pedestrian response time, the traffic data of the vehicles in the lane are monitored in real time by adopting the multi-target detection radar, so that the detection of macroscopic traffic parameters in a normal state, such as traffic flow, occupancy, traffic density and the like, can be realized, and meanwhile, static entities can be detected, so that traffic conflicts can be better identified, and traffic accidents can be better prevented. Compared with a detection device in a traditional traffic control system, the feedback traffic control information is more accurate, the traffic parameter algorithm is more accurate, and the traffic data collection is more comprehensive.
The signal control system and the monitoring system provided by the invention are constrained by the NTCIP communication protocol together, so that the butt joint between the equipment is realized, and the system realization of the traffic control is realized. When the control unit calculates the safe parking sight distance, the factors of the vehicle brake clearance elimination time, the driver reaction time and the vehicle full-braking distance are considered, and the lamp grabbing time of the non-motor vehicle is counted into the basic reaction time, namely a safe parking sight distance calculation formula:
according to the basic data transmitted in real time, the signal control system automatically analyzes the traffic state in the target area and the traffic individuals with abnormal intersections, carries out final judgment on the abnormal states and real-time continuous traffic prediction according to the real-time motion characteristics of the traffic individuals, and timely controls the phase of the zebra crossing LED lamp groups on the pedestrian crossings and signal transmission. Therefore, the invention considers the pedestrian and non-motor vehicle passing state at the road intersection under the most adverse condition, and the control is more scientific.
According to the zebra crossing warning lamp set provided by the invention, the treading power generation device is arranged below the zebra crossing LED lamp set, and the power supply principle is that an underground strong magnet is pushed by a pedal to enable the magnet to move back and forth in a coil, and the coil generates power by cutting a magnetic line of force. Under pedestrian trampled and the vehicle rolls the effect, ground produced small deformation, trampled the device and collected the accumulation with small deformation, can turn into the electric energy with pedestrian on the zebra crossing and the mechanical energy that the vehicle produced, and the comprehensive benefit is higher. Compared with the traditional mode of singly utilizing the power grid along the road to supply power to the traffic control equipment, the energy system provided by the invention aims at reducing the energy consumption and has ideal popularization prospect.
The zebra crossing safety warning system under the vehicle-road cooperative environment is scientific in method, stable in result and good in application prospect in scientific research and practical engineering application.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic diagram of the system operation of the present invention;
FIG. 3 is a schematic view of a zebra crossing warning light set;
description of reference numerals: 1. a multi-target radar detector 1; 2. a zebra crossing LED lamp group 1; 3. a vehicle detection line 1; 4. a multi-target radar detector 2; 5. a zebra crossing LED lamp group 2; 6. the vehicle detection line 2.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
The embodiment exemplifies the situation that the pedestrian passes through the zebra crossing and plays a mobile phone because of head lowering or the sight line is blocked to run the red light, explains the working flow of the system, and analogizes the other situations. The method comprises the following specific steps:
(1) the zebra crossing warning light group is arranged: the arrangement of the zebra crossing warning lamp group comprises a zebra crossing LED lamp group 1(2) and a zebra crossing LED lamp group 2(5), and the total width of the road is as follows according to the regulations of road traffic sign and marking setting specification GB51038-2015 implemented since 2015, as shown in FIG. 1, taking a bidirectional four-lane with a motor lane width of 14.0m and a non-motor lane width of 7.0m as examples: 14.0m +7.0m ═ 21.0m, number of zebra stripes arranged: 21.0/(0.45+0.6) ═ 20 stripes, (where zebra stripes are 0.45m wide and 0.6m apart). All the LED lamps arranged on each traffic direction lane of the road form a zebra crossing LED lamp group, and the arrangement of the LED lamp groups 1 and 2 and the arrangement of the zebra crossing LED lamp groups 2 and 5 are respectively controlled by 2 groups of control units.
(2) Installing a zebra crossing warning lamp group: the trample power generation device is arranged below the LED lamp group 1(2) and the zebra crossing LED lamp group 2(5), the LED lamp group 1(2) and the zebra crossing LED lamp group 2(5) both comprise three rows of LED indicating lamps, as shown in fig. 3, the diameter of each LED indicating lamp is 2.7cm, the distance of 3cm is arranged in the middle of each zebra crossing, the length of each zebra crossing is 3m, and the number of the indicating lamps which can be arranged in each row is as follows: (300-6)/5.7-51, so each zebra crossing has about 3 x 51-154 LED indicator lights arranged. In the installation process, toughened glass protective sleeves are additionally arranged on the surfaces of the LED lamp groups 1 and 2 and the surfaces of the zebra crossing LED lamp groups 2 and 5, the signal lamp phase is accessed, and pedestrians are guided to pass through by adopting a mode of combining the zebra crossing LED lamp groups and the pedestrian signal lamps. (3) The method comprises the following working steps under the condition that a pedestrian passes through a zebra crossing and plays a mobile phone due to head lowering or the sight is blocked to run a red light: as shown in fig. 1 and 2, the multi-target radar detector 1(1) and the multi-target radar detector 2(4) are arranged at a position 15m downstream of the traffic flow from the intersection vehicle stop line, and can simultaneously detect the pedestrian condition of the zebra crossing and the vehicle running condition of each lane upstream of the traffic flow, each lane is respectively provided with a detection point, the detection points are connected into a vehicle detection line 1(3) and a vehicle detection line 2(6), and the vehicle detection line 30m from the intersection vehicle stop line forms a 90-degree included angle with the road, namely the direction perpendicular to the road. The preset value of the safe vehicle speed is 50 km/h. When the traffic lights are switched and the pedestrian signal lights are red, and when the pedestrian violates the traffic signal indication and passes through the zebra crossing, the monitoring system monitors the traffic condition in the road intersection in real time, judges that the traffic behavior of the pedestrian is in an abnormal state and synchronously transmits the abnormal state to the control system; the control system analyzes and processes the received pedestrian traffic information, dynamically controls the display of the LED lamp sets 1 and 2 and the display of the zebra crossing LED lamp sets 2 and 5 of the pedestrian crosswalk, and controls the zebra crossing LED lamp sets of the pedestrian crosswalk by the control unit when the traffic behavior of the pedestrian is determined to be in an abnormal state and the danger possibility that the pedestrian runs red light to pass the crosswalk is existed. The LED lamp groups 1 and 2 of the pedestrian crosswalk and the Zebra stripe LED lamp groups 2 and 5 become red stroboscopic states to warn pedestrians to avoid vehicles.
Claims (1)
1. A zebra crossing safety warning system suitable for a vehicle-road cooperative environment is characterized by comprising a monitoring system, a signal control system and a zebra crossing warning lamp set; the monitoring system is a multi-target radar detector; the signal control system comprises 2 groups of signal control units; the zebra crossing warning lamp group comprises a zebra crossing LED lamp group and a treading power generation device;
the monitoring system is arranged at a position 15m away from a vehicle stop line of an intersection downstream of a traffic stream by using a multi-target radar detector, can simultaneously detect the pedestrian condition of a zebra crossing and the vehicle running condition of each lane upstream of the traffic stream, each lane is provided with a detection point, the detection points are connected into a vehicle detection line, the vehicle detection line is 30m away from the vehicle stop line of the intersection, and the intersection of the vehicle detection line and the road forms a 90-degree included angle, namely the direction perpendicular to the road, and the preset value of the safe vehicle speed is 50 km/h;
the signal control system comprises 2 groups of signal control units, the signal control units are used for respectively controlling the phases and signal transmission of zebra crossing LED lamp groups in two directions on a pedestrian crossing, the signal control units adopt a single-point induction control mode, and the lamp grabbing time of a non-motor vehicle is counted into basic reaction time in an intelligent phase program, namely a safe parking sight distance calculation formula:
in the formula: s is a parking sight distance (m); t is the basic reaction time, and 2.5s is taken; t is t3Taking 0.6s as the rising time of the braking force; a ismaxFor maximum braking deceleration (m/s)2),amaxGf (data indicating a maximum vehicle braking deceleration of 8m/s2The running speed of the urban road vehicle is 40km/h, and the friction coefficient f value of the road is 0.3); v is a safety vehicle speed preset value, and 50km/h is taken;
the zebra crossing warning lamp group comprises 2 groups of zebra crossing warning lamp groups, the zebra crossing warning lamp groups are respectively arranged on pedestrian crossings, the trample power generation device is arranged below the zebra crossing LED lamp groups, each zebra crossing LED lamp group comprises three rows of LED indicating lamps, the diameter of each LED indicating lamp is 2.7cm, the interval between every two zebra crossings is 3cm, and in the installation process, toughened glass protective sleeves are additionally arranged on the surfaces of the zebra crossing LED lamp groups and are connected with the phase of a signal lamp;
under the condition that the pedestrian passes through the zebra crossing and plays a mobile phone because of lowering the head or the sight is obstructed and runs the red light, the system comprises the following working steps: the multi-target radar detector is arranged at a position 15m away from a vehicle stop line at an intersection at the downstream of a traffic stream, when a traffic light is switched and a pedestrian traffic signal light is red, and when a pedestrian violates a traffic signal indication and passes through a zebra crossing, the monitoring system monitors the traffic condition in the road intersection in real time, judges that the traffic behavior of the pedestrian is an abnormal state, and synchronously transmits the abnormal state to the control system; the control system analyzes and processes the received pedestrian traffic information, dynamically controls the display of the zebra crossing LED lamp sets of the pedestrian crossing where the pedestrian is located, and controls the zebra crossing LED lamp sets of the pedestrian crossing where the pedestrian is located to be in a red stroboscopic state to warn the pedestrian to avoid vehicles when the traffic behavior of the pedestrian is determined to be in an abnormal state and the danger possibility that the pedestrian runs a red light to pass through the pedestrian crossing exists;
the driver causes the condition that the vehicle can not park or even run the red light before the intersection stop line because of factors such as fatigue driving, insufficient conciseness of zebra crossing, and the system working steps include: the multi-target radar detector is arranged at a position 15m away from a vehicle stop line of the intersection at the downstream of a traffic flow, can simultaneously detect the pedestrian condition of a zebra crossing and the vehicle running condition of each lane at the upstream of the traffic flow, each lane is provided with a detection point, the detection points are connected into a vehicle detection line, and the vehicle detection line forms an included angle of 90 degrees with the intersection of 30m away from the vehicle stop line of the intersection and the road, namely the direction perpendicular to the road; the safety vehicle speed preset value is 50km/h, when the traffic lights are switched and pedestrian signal lights are green, when the vehicle running speed exceeds the safety vehicle speed preset value, namely the vehicle speed exceeds 50km/h, the monitoring system carries out real-time monitoring on the vehicle speed of the vehicle detection line, judges that the traffic behavior of the vehicle is in an abnormal state and synchronously transmits the abnormal state to the control system; the control system analyzes and processes the received vehicle information, dynamically controls the display of the road lamp group corresponding to the lane, and controls the zebra crossing LED lamp group corresponding to the lane where the overspeed vehicle is located to be in a red stroboscopic state when the traffic behavior of the vehicle is determined to be in an abnormal state and the dangerous possibility that the vehicle cannot stop at the front of a stop line at an intersection or even run a red light exists;
under the condition that traffic lights are switched and traffic weak groups are still remained on the zebra crossing, the working steps of the system comprise: the multi-target radar detector is arranged at a position 15m away from a vehicle stop line of the intersection at the downstream of the traffic flow, when traffic lights are switched, when a pedestrian stays at the zebra crossing and continues to pass through the intersection, the monitoring system monitors the traffic condition in the road intersection in real time, judges the traffic behavior of the pedestrian to be in an abnormal state and synchronously transmits the abnormal state to the control system; the control system analyzes and processes the received pedestrian traffic information, dynamically controls the display of the zebra crossing LED lamp group of the pedestrian crossing where the pedestrian is located, when the traffic behavior of the pedestrian is determined to be in an abnormal state, the danger possibility that the pedestrian continues to pass through the pedestrian crossing with the unchanged traffic state exists, and the control unit controls the zebra crossing LED lamp group of the pedestrian crossing where the pedestrian is located to be in a red stroboscopic state to remind the pedestrian of waiting for the vehicle to pass.
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