Vehicle-mounted communication road traffic signal countdown display system and method

Abstract

The invention discloses a vehicle-mounted communication road traffic signal countdown display system and method. The system comprises a satellite positioning unit, a road traffic signal lamp timing acquisition unit, a vehicle-mounted navigation system rendering unit, a road traffic signal lamp operation cycle calculation unit, a road traffic signal lamp countdown unit and a road traffic signal lamp operation data storage unit. The effects of road traffic signal lamp operation cycle calculation and road traffic signal countdown display are achieved through the GPS positioning navigation system and the image recognition technology of the vehicle, and the requirement that a traffic signal countdown signal platform of a traffic police department needs to provide data is omitted. And the effect of replacing the road traffic signal lamp operation data in real time is achieved through the road traffic signal lamp operation cycle updating unit.

Description

Technical Field

[0001] The present invention belongs to the field of vehicle signal light control systems, and in particular, relates to a vehicle-mounted communication road traffic signal countdown display system and method. Background Art

[0002] The countdown of road traffic signals in vehicle communications is usually obtained by cooperating with traffic police departments or calculated through big data analysis.

[0003] In the Chinese public invention patent with application number CN202011560555.3, a method for controlling traffic lights in a V2X environment is disclosed, including the following operations: receiving status information of multiple vehicles at a cloud server; and filtering out one or more vehicles that will not encounter traffic lights on their routes within a predetermined distance ahead of them. The method also includes obtaining the on-time status of each remaining vehicle according to a schedule; and optimizing each traffic light in the V2X environment based on the on-time status of the vehicle to obtain a traffic light optimization result. The cloud server can send the traffic light optimization result to the vehicle closest to each traffic light. The vehicle that receives the traffic light optimization result can forward the result to the traffic light closest to the vehicle.

[0004] The defect of the prior art is that the implementation of the above technical solution requires the traffic police department's traffic signal countdown signal platform, cloud server and vehicle communication system to communicate with each other, and the communication protocol must be legal to implement. At the same time, the above patent cannot realize the countdown display of road traffic signals in vehicle communication when there is a lack of countdown signal data provided by the traffic police department. . Summary of the invention

[0005] Aiming at the problem that the existing vehicle-mounted communication road traffic signal countdown display system cannot realize the vehicle-mounted communication road traffic signal countdown display when there is a lack of countdown signal data provided by the traffic police department, the present invention provides a vehicle-mounted communication road traffic signal countdown display system and method.

[0006] In order to achieve the above technical objectives, the technical solution adopted by the present invention is as follows:

[0007] A vehicle-mounted communication road traffic signal countdown display system, comprising a satellite positioning unit, a road traffic signal light timing collection unit, a vehicle-mounted navigation system rendering unit, a road traffic signal light operation cycle calculation unit, a road traffic signal light countdown unit and a road traffic signal light operation data storage unit;

[0008] Satellite positioning unit, which locates the current vehicle position through GPS positioning and navigation system;

[0009] The traffic light timing collection unit collects the historical stay time of other vehicles at the road intersection and transmits it to the traffic light operation cycle calculation unit;

[0010] A traffic light operation cycle calculation unit is used to calculate the current traffic light passing time and traffic light operation cycle at the intersection, and upload the calculated current traffic light passing time and traffic light operation cycle at the intersection to the traffic light operation data storage unit;

[0011] The traffic light countdown unit is used to analyze the road section between the traffic lights and the next road intersection according to the current vehicle position, and then match and search the traffic light passage time and traffic light operation cycle corresponding to the next road intersection in the traffic light operation data storage unit according to the next road intersection information, divide the current clock time by the traffic light passage time and traffic light operation cycle corresponding to the next road intersection, obtain the next road intersection information when the traffic light is in operation or about to operate, and count down ten seconds before the light changes;

[0012] The vehicle navigation system rendering unit renders the traffic light countdown display screen into the vehicle navigation system, so that the driver can observe the countdown time display effect.

[0013] The road traffic signal light operation data storage unit is used to store the road traffic signal light operation data and provide an interface to add, delete and modify the road traffic signal light operation data.

[0014] Furthermore, the traffic light operation data includes the traffic light number at the intersection, the traffic light passing time at the intersection, and the traffic light operation cycle; the traffic light operation data is collected and updated in real time based on the historical stay time of other vehicles passing through the intersection. This prevents the traffic light passing time at the intersection from being updated and updated after a malfunction, maintenance, or other actions to relieve traffic congestion occur during the operation of the traffic light.

[0015] Furthermore, the GPS positioning and navigation system locates the current vehicle position at least accurately to the road section and the intersection signal light number before and after the road section, and the intersection signal light number corresponds to a unique intersection signal light and its position.

[0016] Furthermore, the current traffic light crossing time and traffic light operation cycle calculation process:

[0017] S101, using the external camera of the vehicle passing the current intersection traffic light to collect the time required for the current intersection and the road traffic light to change from red to green; the time required for the road traffic light to change from red to green is taken as the time required for the light to change by the vehicle's parking time at the intersection and the longest parking time for the change from red to green, and the traffic light change time collected by the vehicle's external camera is mutually verified. The traffic light change collected by the vehicle's external camera can be processed by an image recognition algorithm to obtain the traffic light change duration, that is, the road traffic light with different changes in the image is obtained by an image difference hash algorithm, and then the interval time of the two picture video streams with different changes in the image is obtained, which can be used as the road traffic light red-green change time.

[0018] S102, the time period when the traffic light at the current intersection changes from red to green is used as the red light stop period, and the time period when the green light changes from green to red is used as the green light passable period;

[0019] S103, the time period when the red light turns to green light in step S102 plus the time period when the green light turns to red light is the operation cycle of the road traffic signal light.

[0020] Furthermore, the traffic light countdown unit divides the current clock time by the corresponding next road intersection traffic light passage time and the traffic light operation cycle to calculate the following:

[0021] S201, converting the current clock time into a time unit of N seconds;

[0022] S202, dividing the converted N seconds by the traffic light operation cycle T to obtain a remainder value;

[0023] S203, compare the remainder value with the traffic light passing time at the road intersection. If the remainder value is smaller than the traffic light passing time, proceed to step S204; if the remainder value is larger than the traffic light passing time, proceed to step S205;

[0024] S204, judging that the remainder value is within the traffic light passing time of the road intersection (the remainder value is compared with the traffic light passing time of the road intersection, if it is less than the remainder value, it is within the traffic light passing time of the road intersection, and if it is greater than the remainder value, it is outside the traffic light passing time of the road intersection), then the road traffic light is in operation (the time period when the red light turns green), and proceeding to step S206;

[0025] S205, judging that the remainder value is outside the traffic light passing time at the road intersection, and the red light state is about to turn green, and proceeding to step S207;

[0026] S206, subtract the remainder value from the traffic light passing time at the road intersection (the time period when the green light turns red), to obtain the countdown passing time, and when the countdown passing time is equal to ten seconds, start the countdown and display it on the rendering unit of the vehicle navigation system;

[0027] S207, the remainder value is subtracted from the entire traffic light operation cycle T to obtain the countdown stop time. When the countdown stop time is equal to ten seconds, the countdown starts and is displayed on the rendering unit of the vehicle navigation system.

[0028] Furthermore, it also includes a traffic light operation cycle update unit, which is used to regularly calculate the current traffic light passage time and traffic light operation cycle at the intersection, and if so, to modify the stored traffic light operation data. The calculation is performed by collecting the historical stay time of other vehicles at the intersection passing in real time.

[0029] A vehicle-mounted communication road traffic signal countdown display method, comprising the steps of:

[0030] S1. Locate the current vehicle position through the GPS positioning navigation system;

[0031] S2, obtaining the traffic light numbers of the road section and the road intersections before and after the road section, and matching and storing the traffic light operation data of the road;

[0032] S3, according to the current position of the vehicle, analyzing the road section between the traffic lights and the next road intersection, and then matching and searching the traffic light operation data storage unit corresponding to the next road intersection according to the information of the next road intersection, dividing the current clock time by the traffic light operation time and the traffic light operation cycle corresponding to the next road intersection, obtaining the state of the next road intersection when the traffic light is in operation or about to operate, and counting down ten seconds before the light changes;

[0033] S4. Rendering a traffic light countdown display screen into the vehicle navigation system.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] The vehicle's built-in GPS positioning navigation system and image recognition technology are used to calculate the road traffic light operation cycle and display the road traffic signal countdown, eliminating the need for the traffic police department's traffic signal countdown signal platform to provide data.

[0036] The effect of real-time replacement of road traffic signal light operation data is achieved through the road traffic signal light operation cycle update unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is an overall structural block diagram of a vehicle-mounted communication road traffic signal countdown display system in an embodiment of the present invention;

[0038] Figure 2 The present invention is a flowchart of a method for calculating the integer division of the current clock time with the corresponding traffic light passage time and traffic light operation cycle at the next road intersection. DETAILED DESCRIPTION

[0039] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments and drawings. The contents mentioned in the implementation modes are not intended to limit the present invention.

[0040] like Figure 1 As shown, this embodiment provides a vehicle-mounted communication road traffic signal countdown display system, including a satellite positioning unit, a road traffic signal light timing collection unit, a vehicle-mounted navigation system rendering unit, a road traffic signal light operation cycle calculation unit, a road traffic signal light countdown unit and a road traffic signal light operation data storage unit;

[0041] Satellite positioning unit, which locates the current vehicle position through GPS positioning and navigation system;

[0042] The traffic light timing collection unit collects the historical stay time of other vehicles at the road intersection and transmits it to the traffic light operation cycle calculation unit;

[0043] A traffic light operation cycle calculation unit is used to calculate the current traffic light passing time and traffic light operation cycle at the intersection, and upload the calculated current traffic light passing time and traffic light operation cycle at the intersection to the traffic light operation data storage unit;

[0044] The traffic light countdown unit is used to analyze the road section between the traffic lights and the next road intersection according to the current vehicle position, and then match and search the traffic light passage time and traffic light operation cycle corresponding to the next road intersection in the traffic light operation data storage unit according to the next road intersection information, divide the current clock time by the traffic light passage time and traffic light operation cycle corresponding to the next road intersection, obtain the next road intersection information when the traffic light is in operation or about to operate, and count down ten seconds before the light changes;

[0045] The vehicle navigation system rendering unit renders the traffic light countdown display screen into the vehicle navigation system, so that the driver can observe the countdown time display effect.

[0046] The road traffic signal light operation data storage unit is used to store the road traffic signal light operation data and provide an interface to add, delete and modify the road traffic signal light operation data.

[0047] Furthermore, the traffic light operation data includes the traffic light number at the intersection, the traffic light passing time at the intersection, and the traffic light operation cycle; the traffic light operation data is collected and updated in real time based on the historical stay time of other vehicles passing through the intersection. This prevents the traffic light passing time at the intersection from being updated and updated after a malfunction, maintenance, or other actions to relieve traffic congestion occur during the operation of the traffic light.

[0048] Furthermore, the GPS positioning and navigation system locates the current vehicle position at least accurately to the road section and the intersection signal light number before and after the road section, and the intersection signal light number corresponds to a unique intersection signal light and its position.

[0049] Furthermore, the current traffic light crossing time and traffic light operation cycle calculation process:

[0050] S101, using the external camera of the vehicle passing the current intersection traffic light to collect the time required for the current intersection and the road traffic light to change from red to green; the time required for the road traffic light to change from red to green is taken as the time required for the light to change by the vehicle's parking time at the intersection and the longest parking time for the change from red to green, and the traffic light change time collected by the vehicle's external camera is mutually verified. The traffic light change collected by the vehicle's external camera can be processed by an image recognition algorithm to obtain the traffic light change duration, that is, the road traffic light with different changes in the image is obtained by an image difference hash algorithm, and then the interval time of the two picture video streams with different changes in the image is obtained, which can be used as the road traffic light red-green change time.

[0051] S102, the time period when the traffic light at the current intersection changes from red to green is used as the red light stop period, and the time period when the green light changes from green to red is used as the green light passable period;

[0052] S103, the time period when the red light turns to green light in step S102 plus the time period when the green light turns to red light is the operation cycle of the road traffic signal light.

[0053] like Figure 2 As shown, the traffic light countdown unit divides the current clock time by the corresponding next road intersection traffic light passage time and the traffic light operation cycle by an integer calculation method:

[0054] S201, converting the current clock time into a time unit of N seconds;

[0055] S202, dividing the converted N seconds by the traffic light operation cycle T to obtain a remainder value;

[0056] S203, compare the remainder value with the traffic light passing time at the road intersection. If the remainder value is smaller than the traffic light passing time, proceed to step S204; if the remainder value is larger than the traffic light passing time, proceed to step S205;

[0057] S204, judging that the remainder value is within the traffic light passing time of the road intersection (the remainder value is compared with the traffic light passing time of the road intersection, if it is less than the remainder value, it is within the traffic light passing time of the road intersection, and if it is greater than the remainder value, it is outside the traffic light passing time of the road intersection), then the road traffic light is in operation (the time period when the red light turns green), and proceeding to step S206;

[0058] S205, judging that the remainder value is outside the traffic light passing time at the road intersection, and the red light state is about to turn green, and proceeding to step S207;

[0059] S206, subtract the remainder value from the traffic light passing time at the road intersection (the time period when the green light turns red), to obtain the countdown passing time, and when the countdown passing time is equal to ten seconds, start the countdown and display it on the rendering unit of the vehicle navigation system;

[0060] S207, the remainder value is subtracted from the entire traffic light operation cycle T to obtain the countdown stop time. When the countdown stop time is equal to ten seconds, the countdown starts and is displayed on the rendering unit of the vehicle navigation system.

[0061] Furthermore, it also includes a traffic light operation cycle update unit, which is used to regularly calculate the current traffic light passage time and traffic light operation cycle at the intersection, and if so, to modify the stored traffic light operation data. The calculation is performed by collecting the historical stay time of other vehicles at the intersection passing in real time.

[0062] A vehicle-mounted communication road traffic signal countdown display method, comprising the steps of:

[0063] S1. Locate the current vehicle position through the GPS positioning navigation system;

[0064] S2, obtaining the traffic light numbers of the road section and the road intersections before and after the road section, and matching and storing the traffic light operation data of the road;

[0065] S3, according to the current position of the vehicle, analyzing the road section between the traffic lights and the next road intersection, and then matching and searching the traffic light operation data storage unit corresponding to the next road intersection according to the information of the next road intersection, dividing the current clock time by the traffic light operation time and the traffic light operation cycle corresponding to the next road intersection, obtaining the state of the next road intersection when the traffic light is in operation or about to operate, and counting down ten seconds before the light changes;

[0066] S4. Rendering a traffic light countdown display screen into the vehicle navigation system.

[0067] Compared with the prior art, the present invention has the following beneficial effects:

[0068] The vehicle's built-in GPS positioning navigation system and image recognition technology are used to calculate the road traffic light operation cycle and display the road traffic signal countdown, eliminating the need for the traffic police department's traffic signal countdown signal platform to provide data.

[0069] The effect of real-time replacement of road traffic signal light operation data is achieved through the road traffic signal light operation cycle update unit.

[0070] The above is a detailed introduction to a vehicle-mounted communication road traffic signal countdown display system and method provided by the present application. The description of the specific embodiment is only used to help understand the method and its core idea of ​​the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A vehicle-mounted communication road traffic signal countdown display system, characterized in that: It includes a satellite positioning unit, a road traffic signal light timing collection unit, a vehicle navigation system rendering unit, a road traffic signal light operation cycle calculation unit, a road traffic signal light countdown unit and a road traffic signal light operation data storage unit; Satellite positioning unit, which locates the current vehicle position through GPS positioning and navigation system; The traffic light timing collection unit collects the historical stay time of other vehicles at the road intersection and transmits it to the traffic light operation cycle calculation unit; A traffic light operation cycle calculation unit is used to calculate the current traffic light passing time and traffic light operation cycle at the intersection, and upload the calculated current traffic light passing time and traffic light operation cycle at the intersection to the traffic light operation data storage unit; The traffic light countdown unit is used to analyze the road section between the traffic lights and the next road intersection according to the current vehicle position, and then match and search the traffic light passage time and traffic light operation cycle corresponding to the next road intersection in the traffic light operation data storage unit according to the next road intersection information, divide the current clock time by the traffic light passage time and traffic light operation cycle corresponding to the next road intersection, obtain the next road intersection information when the traffic light is in operation or about to operate, and count down ten seconds before the light changes; A vehicle navigation system rendering unit renders a traffic light pass countdown display screen into the vehicle navigation system; The road traffic signal light operation data storage unit is used to store the road traffic signal light operation data and provide an interface to add, delete and modify the road traffic signal light operation data.

2. The vehicle-mounted communication road traffic signal countdown display system according to claim 1, characterized in that: The traffic light operation data includes the traffic light number at the intersection, the traffic light passage time at the intersection and the traffic light operation cycle; the traffic light operation data is collected and updated in real time based on the historical stay time of other vehicles passing through the intersection.

3. The vehicle-mounted communication road traffic signal countdown display system according to claim 2, characterized in that: The GPS positioning navigation system locates the current vehicle position at least accurately to the road section and the traffic light number at the intersections before and after the road section. The traffic light number at the intersection corresponds to a unique traffic light at the intersection and its position.

4. The vehicle-mounted communication road traffic signal countdown display system according to claim 3, characterized in that: The current traffic light crossing time and traffic light operation cycle calculation process: S101, collecting the time required for the current intersection and the traffic light to change from red to green through an external camera of a vehicle passing by the traffic light at the current intersection; S102, the time period when the traffic light at the current intersection changes from red to green is used as the red light stop period, and the time period when the green light changes from green to red is used as the green light passable period; S103, the time period when the red light turns to green light in step S102 plus the time period when the green light turns to red light is the operation cycle of the road traffic signal light.

5. The vehicle-mounted communication road traffic signal countdown display system according to claim 4, characterized in that: The traffic light countdown unit divides the current clock time by the corresponding next road intersection traffic light passage time and the traffic light operation cycle by an integer calculation method: S201, converting the current clock time into a time unit of N seconds; S202, dividing the converted N seconds by the traffic light operation cycle T to obtain a remainder value; S203, compare the remainder value with the traffic light passing time at the road intersection. If the remainder value is smaller than the traffic light passing time, proceed to step S204; if the remainder value is larger than the traffic light passing time, proceed to step S205; S204, if the remainder value is within the traffic light passing time at the road intersection, the road traffic light is in operation, and the process proceeds to step S206; S205, judging that the remainder value is outside the traffic light passing time at the road intersection, and the red light state is about to turn green, and proceeding to step S207; S206, subtracting the remainder value from the traffic light passing time at the road intersection to obtain the countdown passing time, and when the countdown passing time is equal to ten seconds, the countdown starts and is displayed on the rendering unit of the vehicle navigation system; S207, the remainder value is subtracted from the entire traffic light operation cycle T to obtain the countdown stop time. When the countdown stop time is equal to ten seconds, the countdown starts and is displayed on the rendering unit of the vehicle navigation system.

6. The vehicle-mounted communication road traffic signal countdown display system according to claim 5, characterized in that: It also includes a road traffic signal light operation cycle update unit, which is used to regularly calculate the current traffic signal light passage time at the intersection and whether the traffic signal light operation cycle has changed. If there is a change, the stored road traffic signal light operation data is modified.

7. A vehicle-mounted communication road traffic signal countdown display method, characterized in that: Includes steps: S1. Locate the current vehicle position through the GPS positioning navigation system; S2, obtaining the traffic light numbers of the road section and the road intersections before and after the road section, and matching and storing the traffic light operation data of the road; S3, according to the current position of the vehicle, analyzing the road section between the traffic lights and the next road intersection, and then matching and searching the traffic light operation data storage unit corresponding to the next road intersection according to the information of the next road intersection, dividing the current clock time by the traffic light operation time and the traffic light operation cycle corresponding to the next road intersection, obtaining the state of the next road intersection when the traffic light is in operation or about to operate, and counting down ten seconds before the light changes; S4. Rendering a traffic light countdown display screen into the vehicle navigation system.

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