Traffic signal lamp control system

Abstract

The invention discloses a traffic signal lamp control system, and relates to the technical field of traffic management. Comprising a data acquisition module, a communication module, a data processing module and a signal lamp module, the data acquisition module is used for acquiring traffic flow and pedestrian flow conditions at a signal lamp road section, an input end of the communication module is connected with the data acquisition module and is used for realizing a data communication function among the modules, and the data processing module is in communication connection with the communication module and is used for processing data. The communication module is used for analyzing traffic flow and pedestrian flow conditions, judging road section conditions and outputting signal lamp duration time signals, and the signal lamp module is connected with the output end of the communication module and used for executing the signal lamp duration time signals. The traffic signal lamp duration can be dynamically adjusted, and the vehicle congestion condition on the road is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of traffic management, and in particular to a traffic signal light control system. Background Art

[0002] In urban traffic management, traffic lights play a vital role in guiding vehicles and pedestrians to abide by traffic rules, avoiding traffic accidents, and ensuring the safety of drivers and pedestrians. At the same time, traffic lights can also dispatch and control traffic flow, optimize traffic flow, and improve traffic efficiency. With the rapid growth of car ownership, the test for urban traffic has become more severe, especially during peak travel time periods. The traffic efficiency of existing roads is fixed. If vehicles with different flows at the intersection cannot be reasonably cleared, it will easily lead to the rapid accumulation of vehicles in some directions, causing congestion.

[0003] Therefore, how to provide a traffic light control system to solve the difficulties existing in the prior art is a problem that those skilled in the art need to solve urgently. Summary of the invention

[0004] In view of this, the present invention provides a traffic light control system, which can dynamically adjust the duration of traffic lights and improve vehicle congestion on the road.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] A traffic signal light control system includes a data acquisition module, a communication module, a data processing module and a signal light module;

[0007] Data collection module, used to collect the traffic and pedestrian flow at the traffic light section;

[0008] The communication module, whose input end is connected with the data acquisition module, is used to realize the data communication function between modules;

[0009] The data processing module is connected to the communication module for analyzing the traffic flow and pedestrian flow, judging the road section conditions, and outputting the signal of the duration of the traffic light;

[0010] The signal light module is connected to the output end of the communication module and is used to execute the signal light duration signal.

[0011] Optionally, the data collection module includes a pedestrian flow collection unit, a vehicle flow collection unit and a speed measurement unit;

[0012] The pedestrian flow collection unit is used to collect the number of pedestrians passing through and waiting at traffic intersections;

[0013] Traffic flow collection unit, used to collect the number of vehicles passing through the traffic intersection and the number of vehicles waiting;

[0014] The speed measuring unit is used to detect the vehicle's speed.

[0015] Optionally, the data processing module includes a priority unit, a speed estimation unit, a time estimation unit and a congestion estimation unit;

[0016] Priority unit, used to set the priority of vehicles and pedestrians;

[0017] A speed estimation unit, used to estimate the speed of vehicles passing through traffic intersections;

[0018] A time estimation unit, used to estimate the time it takes for a vehicle to pass through a traffic intersection;

[0019] The congestion estimation unit is used to determine the congestion situation of the road section waiting for passage.

[0020] Optionally, the priority unit includes setting special vehicles as the highest priority, and the second priority is set based on the traffic intersection environment.

[0021] Optionally, the time estimation unit includes: after detecting the vehicle speed at the starting end of the traffic intersection, predicting the vehicle passing time based on the distance of the traffic intersection, thereby generating the yellow traffic light waiting time.

[0022] Optionally, the congestion estimation unit includes a first evaluation module and a second evaluation module;

[0023] The first evaluation module is used to determine whether the traffic period is during the weekday traffic peak, the weekday traffic non-peak or the holiday traffic peak, and preliminarily determine the traffic flow data based on the current period;

[0024] The second evaluation module is used to detect the number of vehicles waiting to pass and the number of vehicles passing, and to turn the light green on the road section with more vehicles. When the difference in the number of vehicles exceeds a threshold, the color of the traffic light is changed or the duration of the traffic light is extended.

[0025] Optionally, the signal light module includes a general processing unit, a sub-processing unit and an instruction recognition unit.

[0026] The main processing unit is used to receive the communication module data and transmit the instruction data in the communication module data to the corresponding sub-processing unit;

[0027] A sub-processing unit, for controlling the color duration of the traffic light according to the instruction data;

[0028] The command recognition unit is used to recognize the traffic police's command gestures and determine the color of the traffic light according to the command gestures.

[0029] It can be seen from the above technical solutions that, compared with the prior art, the present invention provides a traffic light control system, which has the following beneficial effects: 1) The present invention can quickly identify special vehicles and automatically control the operating status of traffic lights to maximize the traffic efficiency of special vehicles, avoid delays of special vehicles due to intersection congestion, and thus reduce the probability of traffic accidents; 2) The present invention dynamically adjusts the duration of the traffic lights at the intersection on the road according to the comparison results, so that the duration of the traffic lights changes with the change of traffic flow data, avoiding the situation where there are vehicles waiting in one direction at the intersection while no vehicles pass in the other direction, thereby improving the vehicle congestion on the road. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0031] Figure 1 The present invention discloses a block diagram of a traffic signal light control system. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Reference Figure 1 As shown, the present invention discloses a traffic signal light control system, including a data acquisition module, a communication module, a data processing module and a signal light module;

[0034] Data collection module, used to collect the traffic and pedestrian flow at the traffic light section;

[0035] The communication module, whose input end is connected with the data acquisition module, is used to realize the data communication function between modules;

[0036] The data processing module is connected to the communication module for analyzing the traffic flow and pedestrian flow, judging the road section conditions, and outputting the signal of the duration of the traffic light;

[0037] The signal light module is connected to the output end of the communication module and is used to execute the signal light duration signal.

[0038] Furthermore, the data collection module includes a pedestrian flow collection unit, a vehicle flow collection unit and a speed measurement unit;

[0039] The pedestrian flow collection unit is used to collect the number of pedestrians passing through and waiting at traffic intersections;

[0040] Traffic flow collection unit, used to collect the number of vehicles passing through the traffic intersection and the number of vehicles waiting;

[0041] The speed measuring unit is used to detect the vehicle's speed.

[0042] Furthermore, the communication module includes a long-range wireless communication unit and a short-range wireless communication unit or a short-range wired communication unit.

[0043] The remote wireless communication unit is used to communicate with the data acquisition module and the data processing module;

[0044] The short-range wireless communication unit or the short-range wired communication unit is used to communicate with the signal light module.

[0045] Specifically, the remote wireless communication unit uses the NB-IOT protocol to communicate with the data acquisition module and the data processing module.

[0046] Further, the data processing module includes a priority unit, a speed estimation unit, a time estimation unit and a congestion estimation unit;

[0047] Priority unit, used to set the priority of vehicles and pedestrians;

[0048] A speed estimation unit, used to estimate the speed of vehicles passing through traffic intersections;

[0049] A time estimation unit, used to estimate the time it takes for a vehicle to pass through a traffic intersection;

[0050] The congestion estimation unit is used to determine the congestion situation of the road section waiting for passage.

[0051] Furthermore, the congestion situation prediction unit specifically includes an image receiving module and an image processing module, and the image processing module includes:

[0052] A storage device, used to pre-store an upper grayscale threshold and a lower grayscale threshold, the upper grayscale threshold and the lower grayscale threshold are used to separate the sky area in the image, and is also used to pre-store a preset pixel value threshold, the preset pixel value threshold is between 0 and 255;

[0053] The haze concentration detection device is used to detect the haze concentration at the location of the signal light in real time and determine the haze removal intensity according to the haze concentration. The haze removal intensity value is between 0 and 1.

[0054] A region division device receives a traffic intersection image based on an image receiving module, performs grayscale processing on the traffic intersection image to obtain a grayscale region image, is also connected to a storage device, identifies pixels in the grayscale region image whose grayscale values ​​are between an upper grayscale threshold and a lower grayscale threshold and form a grayscale sky sub-pattern, segments the grayscale sky sub-pattern from the grayscale region image to obtain a grayscale non-sky sub-image, and obtains a color non-sky sub-image corresponding to the grayscale non-sky sub-image based on a corresponding position of the grayscale non-sky sub-image in the patrol region image;

[0055] A black channel acquisition device is connected to the region division device to obtain a color non-sky sub-image, and for each pixel in the color non-sky sub-image, its RGB three-color channel pixel value is calculated, and a color channel with a minimum color channel pixel value is extracted from the RGB three-color channel pixel values ​​of all pixels in the color non-sky sub-image as a black channel;

[0056] The overall atmospheric light value acquisition device is connected to the storage device to obtain a preset pixel value threshold, and is connected to the area division device and the black channel acquisition device to obtain the traffic intersection image and the black channel respectively, and is used to form a pixel set to be tested with a plurality of pixels whose black channel pixel values ​​in the traffic intersection image are greater than or equal to the preset pixel value threshold, and to use the gray value of the pixel with the maximum gray value in the pixel set to be tested as the overall atmospheric light value;

[0057] The atmospheric scattered light value acquisition device is connected to the area division device and the haze concentration detection device respectively, for each pixel of the traffic intersection image, the minimum value of the RGB three color channel pixel values ​​is extracted as the target pixel value, the target pixel value is filtered using the edge-preserving Gaussian smoothing filter EPGF to obtain the filtered target pixel value, the target pixel value is subtracted from the filtered target pixel value to obtain the target pixel difference, the target pixel difference is filtered using EPGF to obtain the filtered target pixel difference, the filtered target pixel value is subtracted from the filtered target pixel difference to obtain the haze removal reference value, the haze removal intensity is multiplied by the haze removal reference value to obtain the haze removal threshold, the minimum value between the haze removal threshold and the target pixel value is taken as the comparison reference value, and the maximum value between the comparison reference value and 0 is taken as the atmospheric scattered light value of each pixel;

[0058] A medium transmission rate acquisition device is connected to the overall atmospheric light value acquisition device and the atmospheric scattered light value acquisition device respectively, divides the atmospheric scattered light value of each pixel by the overall atmospheric light value to obtain a division value, and subtracts the division value from 1 to obtain the medium transmission rate of each pixel;

[0059] The clear image acquisition device is connected to the area division device, the overall atmospheric light value acquisition device and the medium transmission rate acquisition device respectively, and subtracts the medium transmission rate of each pixel from 1 to obtain a first difference value, multiplies the first difference value by the overall atmospheric light value to obtain a product value, subtracts the product value from the pixel value of each pixel in the traffic intersection image to obtain a second difference value, and divides the second difference value by the medium transmission rate of each pixel to obtain a clear pixel value of each pixel. The pixel value of each pixel in the intersection image includes the RGB three-color channel pixel value of each pixel in the intersection image. Accordingly, the obtained clear pixel value of each pixel includes the RGB three-color channel clear pixel value of each pixel, and the clear pixel values ​​of all pixels constitute a clear traffic intersection image.

[0060] Furthermore, the priority unit includes setting special vehicles as the highest priority, and the second priority is set based on the traffic intersection environment.

[0061] Specifically, when there are densely populated areas such as scenic spots or schools nearby, pedestrians are given priority, otherwise vehicles are given priority.

[0062] Furthermore, the time estimation unit includes: after detecting the vehicle speed at the starting end of the traffic intersection, predicting the vehicle passing time based on the distance of the traffic intersection, thereby generating the yellow traffic light waiting time.

[0063] Further, the congestion estimation unit includes a first evaluation module and a second evaluation module;

[0064] The first evaluation module is used to determine whether the traffic period is during the weekday traffic peak, the weekday traffic non-peak or the holiday traffic peak, and preliminarily determine the traffic flow data based on the current period;

[0065] The second evaluation module is used to detect the number of vehicles waiting to pass and the number of vehicles passing, and to turn the light green on the road section with more vehicles. When the difference in the number of vehicles exceeds a threshold, the color of the traffic light is changed or the duration of the traffic light is extended.

[0066] Specifically, if the traffic period is peak, the frequency of traffic light changes will be appropriately increased. When the difference between the north-south traffic volume and the east-west traffic volume exceeds the threshold, it can be concluded that the north-south traffic volume is large and the east-west traffic volume is small, and the north-south green light time is controlled to be extended.

[0067] Furthermore, the signal light module includes a general processing unit, a sub-processing unit and an instruction recognition unit.

[0068] The main processing unit is used to receive the communication module data and transmit the instruction data in the communication module data to the corresponding sub-processing unit;

[0069] A sub-processing unit, for controlling the color duration of the traffic light according to the instruction data;

[0070] The command recognition unit is used to recognize the traffic police's command gestures and determine the color of the traffic light according to the command gestures.

[0071] Specifically, a plurality of sub-processing units are connected in parallel to the main processing unit, and each sub-processing unit has a corresponding instruction recognition unit.

[0072] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A traffic light control system, characterized in that: It includes data acquisition module, communication module, data processing module and signal light module; Data collection module, used to collect the traffic and pedestrian flow at the traffic light section; The communication module, whose input end is connected with the data acquisition module, is used to realize the data communication function between modules; The data processing module is connected to the communication module for analyzing the traffic flow and pedestrian flow, judging the road section conditions, and outputting the signal of the duration of the traffic light; The signal light module is connected to the output end of the communication module and is used to execute the signal light duration signal.

2. A traffic light control system according to claim 1, characterized in that: The data collection module includes a pedestrian flow collection unit, a vehicle flow collection unit and a speed measurement unit; The pedestrian flow collection unit is used to collect the number of pedestrians passing through and waiting at traffic intersections; Traffic flow collection unit, used to collect the number of vehicles passing through the traffic intersection and the number of vehicles waiting; The speed measuring unit is used to detect the vehicle's speed.

3. A traffic light control system according to claim 1, characterized in that: The data processing module includes a priority unit, a speed estimation unit, a time estimation unit, and a congestion estimation unit; Priority unit, used to set the priority of vehicles and pedestrians; A speed estimation unit, used to estimate the speed of vehicles passing through traffic intersections; A time estimation unit, used to estimate the time it takes for a vehicle to pass through a traffic intersection; The congestion estimation unit is used to determine the congestion situation of the road section waiting for passage.

4. A traffic light control system according to claim 3, characterized in that: The priority unit includes setting special vehicles as the highest priority, and the second priority is set based on the traffic intersection environment.

5. A traffic light control system according to claim 3, characterized in that: The time estimation unit includes: after detecting the vehicle speed at the starting end of the traffic intersection, predicting the vehicle passing time based on the distance of the traffic intersection, thereby generating the yellow traffic light waiting time.

6. A traffic light control system according to claim 3, characterized in that: The congestion situation estimation unit includes a first evaluation module and a second evaluation module; The first evaluation module is used to determine whether the traffic period is during the weekday traffic peak, the weekday traffic non-peak or the holiday traffic peak, and preliminarily determine the traffic flow data based on the current period; The second evaluation module is used to detect the number of vehicles waiting to pass and the number of vehicles passing, and to turn the light green on the road section with more vehicles. When the difference in the number of vehicles exceeds a threshold, the color of the traffic light is changed or the duration of the traffic light is extended.

7. A traffic light control system according to claim 1, characterized in that: The signal light module includes a general processing unit, a sub-processing unit and an instruction recognition unit. The main processing unit is used to receive the communication module data and transmit the instruction data in the communication module data to the corresponding sub-processing unit; A sub-processing unit, for controlling the color duration of the traffic light according to the instruction data; The command recognition unit is used to recognize the traffic police's command gestures and determine the color of the traffic light according to the command gestures.

Images