Railway crossing early warning system and method

Abstract

The invention discloses a railway crossing early warning system, which comprises a video monitoring assembly and a railway crossing early warning device, and is characterized in that the video monitoring assembly comprises monitoring cameras which are 5-10Km away from a railway crossing and 200-300m away from the railway crossing; the railway crossing early warning device comprises a support assembly which comprises a base, a supporting stand column and a telescopic transverse frame arranged at the upper end of the supporting stand column. The thermal imaging monitoring assembly comprises a first thermal imaging monitoring part and a second thermal imaging monitoring part which are respectively used for acquiring the moving speed of the vehicle and the moving speed of the pedestrian; and the early warning assembly comprises a traffic light early warning part and a voice player, and the traffic light early warning part comprises a first traffic light and a second traffic light which respectively indicate vehicles and pedestrians to pass. The invention further claims to protect an early warning method based on the railway crossing early warning system. According to the invention, on the basis of ensuring safe passing of the railway crossing, the control time of train passing at the railway crossing can be effectively reduced.

Description

Technical Field

[0001] The present invention relates to a railway crossing early warning system, and more particularly to a railway crossing early warning system and method. Background Art

[0002] With the rapid development of railway rail transit and urban rail transit, railway tracks. Urban rails will inevitably intersect with highways, resulting in multiple railway crossings in cities. The railway crossing warning system is a safety protection facility installed at the intersection of railways and highways. It is an important facility to ensure the safe passage of trains on railways, vehicles on highways, and pedestrians on highways through railway crossings. Traditional railway crossing warning systems are generally controlled in advance, and a one-size-fits-all indiscriminate interception method is adopted for pedestrians and vehicles to ensure the safe operation of railway crossings. For example, in the utility model patent with announcement number CN208978872U, a comprehensive automatic warning device for railway crossings is disclosed, including a support rod, a display light is fixedly installed on the front side wall of the support rod, and connecting rods are symmetrically fixedly installed on the left and right side walls of the support rod, and flashing lights are fixedly installed on the outer walls of the two connecting rods. A controller is embedded in the wall of the support rod, and the outer walls of the display light and the flashing light are fixedly installed with protective shells. Flashing lights are used to warn vehicles and pedestrians, and the passage of vehicles and traffic is uniformly controlled. With the increase in the number of vehicles in cities, the urban traffic load is getting heavier. If control is carried out in advance, the load of road traffic will increase in a short period of time, causing road traffic congestion. In addition, the railway crossing warning device that intercepts both people and vehicles in a one-size-fits-all manner is still used at railway crossings. It cannot make full use of the differences between people and vehicles, such as the difference in stop feedback distance, the difference in moving speed, the difference in the probability of accident occurrence, the difference in the probability of people and vehicles passing, etc., so as to improve the traffic efficiency of road traffic. Summary of the invention

[0003] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described hereinafter.

[0004] Another object of the present invention is to provide a railway crossing early warning system, which can effectively reduce the control time of trains passing through the railway crossing on the basis of ensuring safe passage through the railway crossing.

[0005] In order to achieve these purposes and other advantages according to the present invention, a railway crossing warning system is provided, which is arranged on both sides of the railway at the railway crossing, comprising: A video surveillance component, comprising a pair of first surveillance cameras and a pair of second surveillance cameras, wherein the pair of first surveillance cameras are respectively arranged on the outer side of the railway at a distance of 5 to 10 km from the railway crossing in the extending direction of the railway, and the pair of second surveillance cameras are respectively arranged on the outer side of the railway at a distance of 200 to 300 m from the railway crossing in the extending direction of the railway; Railway crossing warning device, comprising: A bracket assembly, comprising a base provided with a power supply battery and a controller, a support column provided on a side of the base close to the railway, and a telescopic cross frame provided on the upper end of the support column, wherein the telescopic cross frame is provided along the extension direction of the highway, and the controller is connected to the power supply battery; The thermal imaging monitoring component includes a first thermal imaging monitoring unit and a second thermal imaging monitoring unit respectively arranged on the fixed portion of the telescopic cross frame and the movable portion of the telescopic cross frame, and used to obtain the starting appearance time, starting appearance coordinate position and moving speed of the vehicle and the pedestrian respectively; An early warning component, comprising a traffic light early warning unit and a voice player, wherein the traffic light early warning unit is arranged on the top of the support column, and the traffic light early warning unit comprises a first traffic light and a second traffic light for indicating the passage of vehicles and pedestrians respectively; Among them, the video monitoring component, the traffic light warning unit, the voice player, the first thermal imaging monitoring unit and the second thermal imaging monitoring unit are all electrically connected to the controller.

[0006] Preferably, the first thermal imaging monitoring unit and the second thermal imaging monitoring unit are respectively arranged near the fixed portion of the telescopic horizontal frame and the end of the movable portion of the telescopic horizontal frame, and both include: A mounting rod, which is arranged vertically; A plurality of thermal imagers are arrayed in the circumferential direction of the mounting pole, and the videos taken by the plurality of thermal imagers cover at least the entire width of the highway after being spliced.

[0007] Preferably, the telescopic cross frame is hinged to the upper end portion of the supporting column, the movable portion of the telescopic cross frame is inserted into the inner cavity of the fixed portion of the telescopic cross frame, and the bottom of the movable portion of the telescopic cross frame and the bottom of the fixed portion of the telescopic cross frame are respectively provided with matching sliders and slide rails, the bottom of the movable portion of the telescopic cross frame has a groove arranged along its length direction, and the groove is hinged with a pair of support rods arranged along the length direction of the telescopic cross frame near the free end of the telescopic cross frame, the length of the support rods is equal to the height of the telescopic cross frame from the ground, and the length of the support rods is not greater than the maximum distance that the movable portion of the telescopic cross frame extends out of the fixed portion of the telescopic cross frame.

[0008] Preferably, an elastic gasket is provided at the bottom of the support rod.

[0009] Preferably, an oblique rod is hingedly connected to the middle of the supporting column, a hook is provided at the free end of the oblique rod, and a hanging rod cooperating with the hook is provided on the base and the telescopic horizontal frame.

[0010] Preferably, the bottom of the base is provided with universal wheels for easy movement.

[0011] The present invention further requires an early warning method based on the railway crossing early warning system, comprising: Step 1: Obtain the timestamp of the train passing fed back by the video monitoring component, wherein the timestamp of the train passing at least marks the time t1 when the train enters the monitoring range of the first monitoring camera, the time t2 when the train is expected to start entering the railway crossing, and the time t3 when the train is expected to completely exit the railway crossing; activate the railway crossing early warning device at time t1; Step 2: Use the first thermal imaging monitoring unit and the second thermal imaging monitoring unit to respectively obtain the coordinate position of the vehicle and the pedestrian, the starting time point of entering the camera range, and the moving speed; Step 3: predict the end time of the vehicle and pedestrian passing through the railway crossing according to the start time, coordinate position, and moving speed of the vehicle and pedestrian entering the camera range of the thermal imaging monitoring unit; Step 4: Set the vehicle error time T i and pedestrian error time T l , respectively predict the vehicle safety time T p and pedestrian safety time T q , where T p =t2-T i , T q =t2-T l ; Step 5: If any vehicle appears in the thermal imaging video captured by the first thermal imaging monitoring unit, the terminal time of any vehicle passing through the railway crossing is later than the safety time T p When the first traffic light turns red until 5s after t3, the voice player repeatedly plays the voice message that vehicles are prohibited from passing; if no vehicle appears in the thermal imaging video shot by the first thermal imaging monitoring unit, or if all vehicles appearing in the thermal imaging video shot by the first thermal imaging monitoring unit have a terminal time of passing the railway crossing earlier than T p When the first traffic light turns green, if any pedestrian appears in the thermal imaging video taken by the second thermal imaging monitoring unit, and the end time of any pedestrian passing through the railway crossing is later than T q When t1 is reached, the second traffic light turns red until t3, and the voice player repeatedly plays the voice message for pedestrians to stop; if no pedestrians appear in the thermal imaging video shot by the second thermal imaging monitoring unit, or if all pedestrians appearing in the thermal imaging video shot by the first thermal imaging monitoring unit have a terminal time of passing the railway crossing earlier than T2. q When the first traffic light and the second traffic light are both on red, the voice player plays the voice information that vehicles are prohibited from passing and pedestrians are stopped in a loop.

[0012] Preferably, the method of using the first thermal imaging monitoring unit and the second thermal imaging monitoring unit to obtain the moving speeds of the vehicle and the pedestrian respectively in step 2 includes: P1, the thermal imaging video data is transmitted according to the preset frequency t x Intercepting to obtain two adjacent frames of video images, and determining whether there is a target A indicating the same person or vehicle in the two adjacent frames of images, if so, obtaining coordinate data B1 and B2 of the target A in the two adjacent frames of video images; P2, according to the coordinate data B1, coordinate data B2 and the preset frequency t x Calculate the moving speed of the vehicle or pedestrian.

[0013] Preferably, the error time T of the vehicle in step 4 is i = 4~6s, pedestrian error time T l =8~12s.

[0014] The present invention has at least the following beneficial effects: First, the railway crossing warning system provided by the present invention includes a video monitoring component and a railway crossing warning device, wherein the video monitoring component includes a first monitoring camera and a second monitoring camera arranged at 5-10 km and 200-300 m away from the railway crossing, the first monitoring camera is used to feedback the start time of the railway crossing warning device, and the second monitoring camera is used to feedback the time when the train starts to enter the railway crossing and the time when the train is expected to completely exit the railway crossing, so as to facilitate the execution of the warning component in the railway crossing warning device, and there is no need to start the railway crossing warning device for a long time in advance, thereby avoiding traffic congestion caused by long-term traffic control and reducing the energy consumption of the railway crossing warning device; Second, the railway crossing warning device in the railway crossing warning system provided by the present invention includes a bracket assembly, a thermal imaging monitoring assembly and a warning assembly, wherein the bracket assembly is used to install the thermal imaging monitoring assembly and the warning assembly, and the thermal imaging monitoring assembly includes a first thermal imaging monitoring unit that feeds back the vehicle moving speed, coordinate position and appearance time, and a second thermal imaging monitoring unit that feeds back the pedestrian moving speed, coordinate position and appearance time, so as to predict the terminal time of vehicles and pedestrians passing through the railway crossing, and is used to scientifically control the warning action of the warning assembly, which greatly reduces the control time of the railway crossing train passing, and significantly reduces the adverse effect of the railway crossing train passing on road traffic; Third, the support assembly in the railway crossing warning system provided by the present invention includes a base, a support column and a telescopic cross frame, a power supply battery and a controller are provided inside the base, the support column is used to set the telescopic cross frame at a high position, and the ends of the fixed part and the movable part of the telescopic cross frame are respectively provided with a first thermal imaging monitoring part and a second thermal imaging monitoring part, so as to facilitate the storage of the railway crossing warning device, the preferred distance between the first thermal imaging monitoring part and the railway crossing is 2~3m, and the preferred distance between the first thermal imaging monitoring part and the second thermal imaging monitoring part is 3~4m, which fully ensures the stopping distance of vehicles and pedestrians, thereby realizing the safety of railway crossing traffic; Fourthly, the first thermal imaging monitoring unit and the second thermal imaging monitoring unit in the railway crossing warning system provided by the present invention both include a plurality of thermal imagers distributed in an array, and the videos shot by the plurality of thermal imagers are spliced ​​to cover at least the entire width of the highway, thereby avoiding the adverse effects of inadequate monitoring; Fifth, the warning component in the railway crossing warning system provided by the present invention includes a first traffic light and a second traffic light for indicating the passage of vehicles and pedestrians respectively, realizing independent indication of vehicles and pedestrians, which not only makes full use of the differences between vehicles and pedestrians to achieve efficient indication, but also can cope with special functional roads that only allow vehicles or pedestrians to pass; Sixthly, the telescopic cross frame in the railway crossing warning system provided by the present invention is hinged to the supporting column, which is convenient for storing the railway crossing warning system; Seventh, the early warning method based on the railway crossing early warning system provided by the present invention makes full use of the time when the train starts to enter the railway crossing, the time when the train is expected to completely exit the railway crossing, and the predicted end time of the vehicle and traffic passing through the railway crossing, so as to scientifically control the safe passage of the railway crossing, reduce the railway crossing control time, and at the same time set the error time, thereby improving the accuracy of the early warning and ensuring the safety of the passage of the railway crossing.

[0015] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a railway crossing warning device in a technical solution of the present invention; Figure 2 A schematic diagram of the railway crossing warning device in another technical solution of the present invention when in use; Figure 3 A schematic diagram of the structure of the first thermal imaging monitoring unit or the second thermal imaging monitoring unit in another technical solution of the present invention; Figure 4It is a bottom schematic diagram of the telescopic horizontal frame described in another technical solution of the present invention; Figure 5 It is a structural schematic diagram of an inclined rod, a hanging rod seat, a hook, and a hanging rod in another technical solution of the present invention; Figure 6 It is a flow chart of the early warning method described in another technical solution of the present invention; 1. First traffic light; 2. Second traffic light; 3. Voice player; 4. Electric telescopic rod; 5. Diagonal rod; 6. Support column; 7. Base; 8. Thermal imager; 9. Mounting rod; 10. Moving part of telescopic cross frame; 11. Fixed part of telescopic cross frame; 12. Support rod; 13. Elastic gasket; 14. Connecting rod; 15. Hanging rod seat; 16. Hook; 17. Hanging rod. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0018] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0019] like Figures 1 to 5 As shown, the present invention provides a railway crossing warning system, which is arranged on both sides of the railway at the railway crossing, and includes: A video surveillance component, comprising a pair of first surveillance cameras and a pair of second surveillance cameras, wherein the pair of first surveillance cameras are respectively arranged on the outer side of the railway at a distance of 5 to 10 km from the railway crossing in the extending direction of the railway, and the pair of second surveillance cameras are respectively arranged on the outer side of the railway at a distance of 200 to 300 m from the railway crossing in the extending direction of the railway; Railway crossing warning device, comprising: A bracket assembly, comprising a base 7 provided with a power supply battery and a controller, a support column 6 provided on the side of the base 7 close to the railway, and a telescopic cross frame provided on the upper end of the support column 6, wherein the telescopic cross frame is provided along the extension direction of the highway, and the controller is connected to the power supply battery; The thermal imaging monitoring component includes a first thermal imaging monitoring unit and a second thermal imaging monitoring unit respectively arranged on the fixed portion 11 of the telescopic cross frame and the movable portion 10 of the telescopic cross frame, and is used to obtain the starting appearance time, starting appearance coordinate position and moving speed of the vehicle and the pedestrian respectively; An early warning component, comprising a traffic light early warning unit and a voice player 3, wherein the traffic light early warning unit is arranged on the top of the support column 6, and comprises a first traffic light 1 and a second traffic light 2 for indicating the passage of vehicles and pedestrians respectively; the traffic light early warning unit is arranged on the top of the support column 6 through an electric telescopic rod to facilitate the storage of the railway crossing early warning device, wherein the first traffic light 1 and the second traffic light 2 are both arranged on a traffic light mounting seat, and the traffic light mounting seat is arranged on the free end of the electric telescopic rod; Among them, the video monitoring component, the traffic light warning unit, the voice player 3, the first thermal imaging monitoring unit and the second thermal imaging monitoring unit are all electrically connected to the controller.

[0020] In the above technical scheme, the railway crossing is the intersection of a railway and a highway. The railway crossing warning system of the present invention includes video monitoring components arranged on both sides of the railway crossing along the extension direction of the railway and railway crossing warning devices arranged on both sides of the railway crossing along the extension direction of the highway. The video monitoring components are arranged on the outside of the railway line and on both sides of the railway crossing along the extension direction of the railway, and are used to monitor the traffic status of trains entering the railway crossing in both directions and control the opening and closing of the railway crossing warning device. The railway crossing warning device is arranged along the highway and on both sides of the railway crossing along the extension direction of the highway, and is used to monitor the traffic status of vehicles and pedestrians on the highway and issue warnings.

[0021] In the above technical solution, the video surveillance component includes two pairs of surveillance cameras, a pair of first surveillance cameras is set at 5~10km away from the railway crossing, and a pair of second surveillance cameras is set at 200~300m away from the railway crossing. A pair of first surveillance cameras are respectively set on both sides of the railway crossing along the extension direction of the railway to monitor the traffic status of vehicles on both sides of the railway crossing. After any first surveillance camera detects that a train enters its monitoring range, it activates the railway crossing early warning device, but does not restrict the traffic of vehicles and pedestrians. At the same time, the time when the train is expected to start entering the railway crossing is predicted through the monitoring video of the first surveillance camera; the second surveillance camera is set closer to the railway crossing, and the train running speed and the time when the train is expected to completely exit the railway crossing are more accurate, so that the action of controlling the early warning component to restrict the traffic of vehicles and pedestrians is more accurate, which greatly reduces the closure time of the railway crossing and reduces the probability of traffic congestion on the road.

[0022] In the above technical solution, the railway crossing warning device includes a pair, which is preferably arranged at the edge of the road on both sides of the railway crossing, and the preferred distance between any railway crossing warning device and the railway crossing is 2-3m, which does not hinder the passage of trains, but also reserves a safe distance for vehicles and pedestrians to prevent danger to vehicles and pedestrians when trains pass. Any railway crossing device is arranged along the extension direction of the railway crossing to the road, and any railway crossing device is arranged close to the edge of the road, so as not to hinder the normal passage of the road.

[0023] In the above technical solution, the railway crossing warning device includes a bracket assembly, a thermal imaging monitoring assembly and a warning assembly. The bracket assembly is used to install the thermal imaging monitoring assembly and the warning assembly. The thermal imaging monitoring assembly is used to monitor the passage status of vehicles and pedestrians and feed back to the controller, so that the controller can accurately control the warning action of the warning assembly; the warning assembly is used to execute the warning action to restrict the passage of vehicles and pedestrians within the safe time for train passage. The bracket assembly includes a base 7, a support column 6 and a telescopic cross frame. A power supply battery and a controller are provided in the base 7. The controller is electrically connected to the power supply battery. The support column 6 is arranged on a side of the base 7 close to the railway crossing. The support column 6 and the telescopic cross frame are arranged in an L shape, that is, the telescopic cross frame and the base 7 are respectively located at the upper end and the lower end of the support column 6. The telescopic cross frame is arranged along the extension direction of the highway. The telescopic cross frame includes a telescopic cross frame fixing portion 11 and a telescopic cross frame movable portion 10. The telescopic cross frame fixing portion 11 and the telescopic cross frame movable portion 10 are respectively provided with a second thermal imaging monitoring portion and a first thermal imaging monitoring portion for monitoring pedestrians and vehicles. As a preferred embodiment, when the telescopic cross frame movable portion 10 is in the longest extension state, the free end of the telescopic cross frame movable portion 10 is 3 to 4 meters away from the end of the telescopic cross frame fixing portion 11 close to the telescopic cross frame movable portion 10, which fully considers the buffer distance when the vehicle stops.

[0024] In the above technical scheme, the thermal imaging monitoring component includes a first thermal imaging monitoring unit and a second thermal imaging monitoring unit for monitoring vehicles and pedestrians respectively. The first thermal imaging monitoring unit and the second thermal imaging monitoring unit are respectively arranged on the telescopic cross frame movable part 10 and the telescopic cross frame fixed part 11. On the one hand, more stopping time is reserved for the vehicle to prevent safety accidents caused by vehicle inertia. The first thermal imaging monitoring unit is used to obtain the starting time, starting coordinate position and moving speed of the vehicle appearing in the first thermal imaging monitoring unit, and the second thermal imaging monitoring unit is used to obtain the starting time, starting coordinate position and moving speed of the pedestrian appearing in the second thermal imaging monitoring unit, so as to predict the safe time for vehicles and pedestrians to pass through the railway crossing.

[0025] In the above technical solution, the warning component includes a traffic light warning unit and a voice player 3, the traffic light warning unit is arranged at a high position on the top of the support column 6 through a telescopic rod, the traffic light warning unit includes a first traffic light 1 and a second traffic light 2 installed on a traffic light mounting seat, wherein the first traffic light 1 cooperates with the first thermal imaging monitoring unit to indicate the passage of vehicles, and the second traffic light 2 cooperates with the second thermal imaging monitoring unit to indicate the passage of pedestrians, and the language player is used to cooperate with the first traffic light 1 and the second traffic light 2 to play the voice. The device 3 stores multiple voice messages. When the first traffic light 1 is red, a voice message of "vehicles please stop" is played; when the first traffic light 1 is green, a voice message of "vehicles please pass" is played; when the second traffic light 2 is red, a voice message of "pedestrians please stop" is played; when the second traffic light 2 is green, a voice message of "pedestrians please pass" is played; when the first traffic light 1 and the second traffic light 2 are red at the same time, the voice messages of "vehicles please stop" and "pedestrians please stop" are played in a loop; when the first traffic light 1 and the second traffic light 2 are green at the same time, the voice messages of "vehicles please pass" and "pedestrians please pass" are played in a loop.

[0026] like Figure 3 As shown, in one of the technical solutions, the first thermal imaging monitoring unit and the second thermal imaging monitoring unit are respectively arranged near the ends of the telescopic horizontal frame fixed portion 11 and the telescopic horizontal frame movable portion 10, and both include: The mounting rod 9 is arranged vertically; A plurality of thermal imagers 8 are distributed in the circumferential direction of the mounting rod 9 through an array of connecting rods 14, and the videos taken by the plurality of thermal imagers 8 cover at least the entire width of the highway after being spliced.

[0027] In the above technical solution, the first thermal imaging monitoring unit and the second thermal imaging monitoring unit have the same structure, both including a mounting rod 9 and a plurality of thermal imagers 8. The mounting rod 9 is vertically arranged on the telescopic cross frame, and a plurality of thermal imagers 8 are arrayed and distributed in the circumference of the mounting rod 9 to facilitate comprehensive collection of information on all vehicles and pedestrians on the road. The plurality of thermal imagers 8 are arranged on one side of the mounting rod 9 close to the road. In order to more comprehensively collect information on vehicles and pedestrians on the road, the railway crossing warning device is arranged on the outside of the edge of the road. When it is difficult to arrange the railway crossing warning device on the outside of the edge of the road, the railway crossing warning device can be arranged on the edge of the road, and the plurality of thermal imagers 8 cannot all be arranged on one side of the mounting rod 9.

[0028] like Figure 1 , Figure 2 and Figure 4As shown, in one of the technical solutions, the telescopic cross frame is hinged to the upper end of the supporting column 6, the telescopic cross frame movable portion 10 is inserted into the inner cavity of the telescopic cross frame fixed portion 11, and the bottom of the telescopic cross frame movable portion 10 and the bottom of the telescopic cross frame fixed portion 11 are respectively provided with matching sliders and slide rails, Figure 4 It can be seen from the bottom schematic diagram that the bottom of the telescopic horizontal frame movable part 10 has a slot arranged along its length direction, and the slot is hinged with a pair of support rods 12 arranged along the length direction of the telescopic horizontal frame near the free end of the telescopic horizontal frame. The support rods 12 are a pair and are respectively arranged close to the slot wall. The slider is arranged between the pair of support rods 12, and the slider is arranged away from the hinge of the support rods 12. The length of the support rod 12 is equal to the height of the telescopic horizontal frame from the ground, and the length of the support rod 12 is not greater than the maximum distance that the telescopic horizontal frame movable part 10 extends out of the telescopic horizontal frame fixed part 11. The telescopic horizontal frame is hinged to the upper end of the support column 6, which is conducive to accommodating the railway crossing warning device. The telescopic horizontal frame movable part 10 and the telescopic horizontal frame fixed part 11 can be slidably arranged to facilitate the rapid extension of the telescopic horizontal frame movable part 10 from the horizontal frame fixed part. The bottom of the telescopic horizontal frame movable part 10 is embedded with a support rod 12 for supporting the telescopic horizontal frame movable part 10 and improving the stability of the railway crossing warning device.

[0029] like Figure 2 As shown, in one of the technical solutions, an elastic gasket 13 is provided at the bottom of the support rod 12 to play a role of wear-resistant buffer to prevent the support rod 12 from wearing.

[0030] like Figure 5 As shown, in one of the technical solutions, an inclined rod 5 is hinged in the middle of the supporting column 6, and a hook 16 is provided at the free end of the inclined rod 5. The base 7 and the telescopic cross frame are both provided with a hanging rod 17 that cooperates with the hook 16. The hanging rod 17 is arranged at the bottom of the base 7 and the telescopic cross frame through a hanging rod seat 15, so as to assist in supporting the telescopic cross frame and increase the stability of the telescopic cross frame.

[0031] In one of the technical solutions, universal wheels are provided at the bottom of the base 7 for easy movement, so as to facilitate the movement of the railway crossing warning device.

[0032] like Figure 5 As shown, the present invention further requires an early warning method based on the railway crossing early warning system, comprising: Step 1: Obtain the timestamp of the train passing fed back by the video monitoring component, wherein the timestamp of the train passing at least marks the time t1 when the train enters the monitoring range of the first monitoring camera, the time t2 when the train is expected to start entering the railway crossing, and the time t3 when the train is expected to completely exit the railway crossing; activate the railway crossing early warning device at time t1; The train heading for the railway crossing first enters the monitoring range of the first monitoring camera. The installation location of the first monitoring camera is 5-10 km away from the railway crossing. At the general train moving speed, the train is expected to enter the railway crossing in 3-5 minutes. When the train enters the monitoring range of the first camera, the time t1 when the train enters the monitoring range of the first monitoring camera (measured from the front of the train) and the time t when the train leaves the monitoring range of the first monitoring camera (measured from the front of the train) are marked first. 10 , according to the distance S of the monitoring range of the first monitoring camera along the extension direction of the railway 10 , calculate the average speed V of the train in the monitoring range of the first monitoring camera 10 , V 10 =S 10 / (t 10 -t1), and then according to the average speed V of the train within the monitoring range of the first monitoring camera 10 Calculate the time t2 when the train is expected to start entering the railway crossing. The distance between the first surveillance camera and the railway crossing is S 11 , t2=t1+S 11 / V 10 The second surveillance camera is installed 300-500m away from the railway crossing. When the train enters the monitoring range of the second camera, the time t when the train enters the monitoring range of the second surveillance camera (measured by the front of the train) is marked. 20 , the time t when the train leaves the monitoring range of the second monitoring camera (measured by the front of the train) 21 , according to the distance S of the second surveillance camera's monitoring range along the extension direction of the railway 20 , calculate the average speed V of the train in the monitoring range of the second monitoring camera 20 , V 20 =S 20 / (t 21 -t 20 ); then according to the length of the train L, the distance S of the second surveillance camera from the starting point of the railway crossing 21 , predict the time t3 when the train is expected to completely exit the railway crossing, t3=t2+(L+S 21 ) / V 20Inspired by this application, more surveillance cameras can be deployed at 300m~2km away from the railway crossing, and the time t3 when the train is expected to completely exit the railway crossing can be calculated more accurately, which is not listed in this application; Step 2: Use the first thermal imaging monitoring unit and the second thermal imaging monitoring unit to obtain the coordinate position of the vehicle and the pedestrian, the starting time point of entering the camera range, and the moving speed; In the video images monitored by the first thermal imaging monitoring unit, it is necessary to distinguish between vehicles and pedestrians. First, the video images obtained by the first thermal imaging monitoring unit are gray-scaled. The calculation method of the average moving speed of vehicles and pedestrians in the monitoring range of the first thermal imaging monitoring unit is the same as the calculation method of the average moving speed of trains in the monitoring range of the first monitoring camera. The thresholds of the moving speed and pixel points of the object are set. When the moving speed and pixel points of the object are both greater than the threshold, the object is a vehicle. This is because the video images obtained based on thermal imaging monitoring show the difference in pixel points due to the difference in the highest temperature of the human body and the vehicle; Step 3: predict the end time of the vehicle and pedestrian passing through the railway crossing according to the start time, coordinate position, and moving speed of the vehicle and pedestrian entering the camera range of the thermal imaging monitoring unit; The starting time of marking the vehicle entering the first thermal imaging monitoring unit is tc 10 , the coordinate position is Sc 10 (X 10 , Y 10 ), with the railway line as the X-axis, the direction perpendicular to the railway line as the Y-axis, and the time when the vehicle leaves the first thermal imaging monitoring unit as tc 20 , the coordinate position is Sc 20 (X 20 , Y 20 ), and then calculate the vehicle's moving distance S based on the two coordinate positions c , and then calculate the vehicle's moving speed V c =S c / (tc 20 -tc 10 ), and finally, according to the shortest distance L between the first thermal imaging monitoring unit and the other side of the railway crossing m Calculate the terminal time tc0=L when the vehicle passes through the railway crossing m / V c ; The starting time when the pedestrian enters the second thermal imaging monitoring unit is tr 10 , coordinate position is Sr 10 (x 10 ,y 10 ), the time when the vehicle leaves the second thermal imaging monitoring unit is tr 20 , coordinate position is Sr 20 (x 20 ,y 20), and then calculate the vehicle's moving distance Sr based on the two coordinate positions, and then calculate the vehicle's moving speed V r =S r / (tr 20 -tr 10 ); finally, according to the shortest distance L between the second thermal imaging monitoring unit and the other side of the railway crossing n Calculate the terminal time tr0=L when the vehicle passes through the railway crossing n / V r ; Step 4: Set the vehicle error time T i and pedestrian error time T l , respectively predict the vehicle safety time T p and pedestrian safety time T q , where T p =t2-T i , T q =t2-T l That is, the vehicle safety time is advanced by T when the train is expected to start entering the railway crossing at time t2. i The pedestrian safety time is advanced by T when the train is expected to start entering the railway crossing at time t2. l time; Step 5: If the vehicle appears in the thermal imaging video shot by the first thermal imaging monitoring unit, the terminal time tc0 of any vehicle passing through the railway crossing is later than the safety time T p When the first traffic light 1 turns red until 5s after t3, the voice player 3 repeatedly plays the voice message that vehicles are prohibited from passing; if no vehicle appears in the thermal imaging video shot by the first thermal imaging monitoring unit, or if all vehicles appearing in the thermal imaging video shot by the first thermal imaging monitoring unit have their end point time tc0 passing the railway crossing earlier than T p When the first traffic light 1 turns green, if the pedestrians appearing in the thermal imaging video taken by the second thermal imaging monitoring unit, the end time tr0 of any pedestrian passing through the railway crossing is later than T q When t1 is reached, the second traffic light 2 turns red until t3, and the voice player 3 repeatedly plays the voice message of pedestrians stopping; if no pedestrians appear in the thermal imaging video shot by the second thermal imaging monitoring unit, or if all pedestrians appearing in the thermal imaging video shot by the first thermal imaging monitoring unit have their end time tr0 of passing the railway crossing earlier than T2. q When the second traffic light 2 turns green, the voice player 3 plays the voice message of vehicles prohibited from passing and pedestrians stopping in a loop. When the estimated end time tc0 of any vehicle appearing in the first thermal imaging monitoring unit is later than the safety time Tp When all vehicles stop passing, if any pedestrian appears in the second thermal imaging monitoring unit, the estimated end time tr0 of the pedestrian passing through the railway crossing is later than the safety time T q When the red light comes on, all pedestrians stop and the red light for vehicles is delayed by 5 seconds to separate people and vehicles and improve the safety of traffic at the intersection. This is especially important on roads without sidewalks.

[0033] In one of the technical solutions, the method of using the first thermal imaging monitoring unit and the second thermal imaging monitoring unit to obtain the moving speed of the vehicle and the pedestrian respectively in step 2 includes: P1, the thermal imaging video data is transmitted according to the preset frequency t x Intercepting to obtain two adjacent frames of video images, and determining whether there is a target A indicating the same person or vehicle in the two adjacent frames of images, if so, obtaining coordinate data B1 and B2 of the target A in the two adjacent frames of video images; The specific method for determining whether there is a target A indicating the same person or vehicle in two adjacent frames of images is as follows: grayscale processing is performed on two adjacent frames of video images. First, the error of the total number of pixels of the two adjacent frames of video images is determined respectively. If the error of the total number of pixels does not exceed 3-5%, it is determined that there may be a target A indicating the same person or vehicle in the two adjacent frames of video images. Then, the proportion of the number of pixels with grayscale values ​​greater than a first threshold in the total number of all pixels in the entire image in the two adjacent frames of video images is determined. If the error of this proportion does not exceed 2-3%, it is determined that there is a target A indicating the same person or vehicle in the two adjacent frames of video images. P2, according to the coordinate data B1, coordinate data B2 and the preset frequency t x Calculate the moving speed of the vehicle or pedestrian.

[0034] In one of the technical solutions, the error time T of the vehicle in step 4 is i = 4~6s, pedestrian error time T l =8~12s, which is set according to the width of general railway crossings. It can be flexibly adjusted according to the changes in the width of railway crossings. Generally speaking, the wider the width of the railway crossing, the longer the error time between vehicles and pedestrians, and the narrower the width of the railway crossing, the shorter the error time between vehicles and pedestrians. This setting is because the vehicle moves faster, and the vehicle is released before the train arrives as much as possible.

[0035] The number of devices and processing scales described here are used to simplify the description of the present invention. Applications, modifications and variations of the railway crossing warning system and method of the present invention will be obvious to those skilled in the art.

[0036] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. Railway crossing warning system, which is installed on both sides of the railway at the railway crossing, characterized in that: include: A video surveillance component, comprising a pair of first surveillance cameras and a pair of second surveillance cameras, wherein the pair of first surveillance cameras are respectively arranged on the outer side of the railway at a distance of 5 to 10 km from the railway crossing in the extending direction of the railway, and the pair of second surveillance cameras are respectively arranged on the outer side of the railway at a distance of 200 to 300 m from the railway crossing in the extending direction of the railway; Railway crossing warning device, comprising: A bracket assembly, comprising a base provided with a power supply battery and a controller, a support column provided on a side of the base close to the railway, and a telescopic cross frame provided on the upper end of the support column, wherein the telescopic cross frame is provided along the extension direction of the highway, and the controller is connected to the power supply battery; The thermal imaging monitoring component includes a first thermal imaging monitoring unit and a second thermal imaging monitoring unit respectively arranged on the fixed portion of the telescopic cross frame and the movable portion of the telescopic cross frame, and used to obtain the starting appearance time, starting appearance coordinate position and moving speed of the vehicle and the pedestrian respectively; An early warning component, comprising a traffic light early warning unit and a voice player, wherein the traffic light early warning unit is arranged on the top of the support column, and the traffic light early warning unit comprises a first traffic light and a second traffic light for indicating the passage of vehicles and pedestrians respectively; Among them, the video monitoring component, the traffic light warning unit, the voice player, the first thermal imaging monitoring unit and the second thermal imaging monitoring unit are all electrically connected to the controller.

2. The railway crossing warning system according to claim 1, characterized in that: The first thermal imaging monitoring unit and the second thermal imaging monitoring unit are respectively arranged near the fixed portion of the telescopic horizontal frame and the end of the movable portion of the telescopic horizontal frame, and both include: A mounting rod, which is arranged vertically; A plurality of thermal imagers are arrayed in the circumferential direction of the mounting pole, and the videos taken by the plurality of thermal imagers cover at least the entire width of the highway after being spliced.

3. The railway crossing warning system according to claim 2, characterized in that: The telescopic cross frame is hinged to the upper end portion of the supporting column, the movable portion of the telescopic cross frame is inserted into the inner cavity of the fixed portion of the telescopic cross frame, and the bottom of the movable portion of the telescopic cross frame and the bottom of the fixed portion of the telescopic cross frame are respectively provided with matching sliders and slide rails, the bottom of the movable portion of the telescopic cross frame has a groove arranged along its length direction, and a pair of support rods arranged along the length direction of the telescopic cross frame are hinged to the groove near the free end of the telescopic cross frame, the length of the support rods is equal to the height of the telescopic cross frame from the ground, and the length of the support rods is not greater than the maximum distance that the movable portion of the telescopic cross frame extends out of the fixed portion of the telescopic cross frame.

4. The railway crossing warning system according to claim 3, characterized in that: An elastic gasket is arranged at the bottom of the support rod.

5. The railway crossing warning system according to claim 4, characterized in that: An oblique rod is hinged at the middle of the supporting column, a hook is arranged at the free end of the oblique rod, and a hanging rod cooperating with the hook is arranged on the base and the telescopic horizontal frame.

6. The railway crossing warning system according to claim 5, characterized in that: The bottom of the base is provided with universal wheels for easy movement.

7. The warning method of the railway crossing warning system according to any one of claims 1 to 6, characterized in that: include: Step 1: Obtain the timestamp of the train passing fed back by the video monitoring component, wherein the timestamp of the train passing at least marks the time t1 when the train enters the monitoring range of the first monitoring camera, the time t2 when the train is expected to start entering the railway crossing, and the time t3 when the train is expected to completely exit the railway crossing; activate the railway crossing early warning device at time t1; Step 2: Use the first thermal imaging monitoring unit and the second thermal imaging monitoring unit to respectively obtain the coordinate position of the vehicle and the pedestrian, the starting time point of entering the camera range, and the moving speed; Step 3: predict the end time of the vehicle and pedestrian passing through the railway crossing according to the start time, coordinate position, and moving speed of the vehicle and pedestrian entering the camera range of the thermal imaging monitoring unit; Step 4: Set the vehicle error time T i and pedestrian error time T l , respectively predict the vehicle safety time T p and pedestrian safety time T q , where T p =t2-T i , T q =t2-T l ; Step 5: If any vehicle appears in the thermal imaging video captured by the first thermal imaging monitoring unit, the terminal time of any vehicle passing through the railway crossing is later than the safety time T p When the first traffic light turns red until 5s after t3, the voice player repeatedly plays the voice message that vehicles are prohibited from passing; if no vehicle appears in the thermal imaging video shot by the first thermal imaging monitoring unit, or if all vehicles appearing in the thermal imaging video shot by the first thermal imaging monitoring unit have a terminal time of passing the railway crossing earlier than T p When the first traffic light turns green, if any pedestrian appears in the thermal imaging video taken by the second thermal imaging monitoring unit, and the end time of any pedestrian passing through the railway crossing is later than T q When t1 is reached, the second traffic light turns red until t3, and the voice player repeatedly plays the voice message for pedestrians to stop; if no pedestrians appear in the thermal imaging video shot by the second thermal imaging monitoring unit, or if all pedestrians appearing in the thermal imaging video shot by the first thermal imaging monitoring unit have a terminal time of passing the railway crossing earlier than T2. q When the first traffic light and the second traffic light are both on red, the voice player plays the voice information that vehicles are prohibited from passing and pedestrians are stopped in a loop.

8. The early warning method according to claim 7, characterized in that: The method of using the first thermal imaging monitoring unit and the second thermal imaging monitoring unit to obtain the moving speed of the vehicle and the pedestrian respectively in step 2 includes: P1, the thermal imaging video data is transmitted according to the preset frequency t x Intercepting to obtain two adjacent frames of video images, and determining whether there is a target A indicating the same person or vehicle in the two adjacent frames of images, if so, obtaining coordinate data B1 and B2 of the target A in the two adjacent frames of video images; P2, according to the coordinate data B1, coordinate data B2 and the preset frequency t x Calculate the moving speed of the vehicle or pedestrian.

9. The early warning method according to claim 8, characterized in that: The error time T of the vehicle in step 4 i = 4~6s, pedestrian error time T l =8~12s.

Images