CN115394098A - Distributed dynamic monitoring traffic guidance screen control system - Google Patents

Abstract

The invention relates to the technical field of road indication facilities, in particular to a distributed dynamic monitoring traffic guidance screen control system. The invention establishes a distributed traffic guidance screen control module to control a plurality of LED display screens to display signals and perform combined release of dynamic information and static information. The present invention uses a separate control board to control the display of the LED display, increases the display and monitoring functions of the LED display, and at the same time only intercepts the information used to display images in the signal in each display module, improving the refresh rate and information update of the LED display frequency, and a dynamic road condition monitoring method based on multi-sensor fusion is established, and the corresponding moving vehicle target image is obtained through differential calculation, which improves the accuracy and real-time performance of the traffic guidance screen processing system for road monitoring. The strong self-adaptive adjustment algorithm can systematically perceive different lighting conditions in a day, so as to avoid affecting the driver's visual effect due to the brightness factor of the LED display.

Description

A distributed dynamic monitoring traffic guidance screen control system

technical field

The invention relates to the technical field of road indication facilities, and the IPC classification number is G08G1/09, in particular to a distributed dynamic monitoring traffic guidance screen control system.

Background technique

At this stage, with the development of urbanization, urbanized traffic is gradually becoming more complex. At the same time, compared with expressways and main roads, the road network in cities is denser, driving is more difficult, and safety needs more attention. The traffic guidance screen mainly releases road condition information through the LED display, which usually includes static text information, static road network information and dynamic text information and dynamic road network information, etc., so as to remind the driver of the real-time road conditions of the road section. However, the traditional LED display is usually a single control mode, which can only display one kind of road condition information, which is poor in practicability. At the same time, the refresh rate of the screen is low. If the screen part is damaged, the entire LED display needs to be replaced, which is not necessary. Convenience, but the information recognition of dynamic vehicles in some traffic guidance screens usually has poor real-time recognition, low sensitivity, and the influence of noise, which makes it impossible to accurately identify dynamic vehicle information, thus bringing real-time road condition monitoring. Big question.

Patent CN200810112682 provides a real-time road traffic indication system, and establishes a display screen that can be used for traffic light display, and can edit warm reminders by itself and update road condition information in real time. However, the function of the LED display screen described in this patent can be realized by conventional technical means, because one of the basic functions of the LED when editing the text on the LED display screen, and integrating the text display and traffic light display functions at the same time will easily cause the driver to be in the wrong place. Confusion in visual distinction has certain potential safety hazards.

Patent CN201910719192 provides an LED display screen capable of displaying static graphic information and a display method thereof. By adding a mask on the LED display, the mask is coated with a coating, so that the LED display can display the indication content on the mask coating without power on, and display the indication on the LED display when power is on content. However, the method described in this patent increases the structural complexity of the LED display screen, and the main purpose of adding the structure is still to increase the indication information. Although the road information can be displayed when the electricity is different, and the electric energy can be saved at the same time, the displayed road condition information is also It is relatively simple. If the road conditions change, it cannot be replaced quickly and in real time. Generally speaking, the manual maintenance cost of the signs will eventually increase.

Therefore, in view of the problems existing in road traffic indicating screens and guiding screens at this stage, it is urgent to introduce a distributed dynamic monitoring traffic guiding screen control system. By establishing a dynamic target monitoring method based on distributed traffic guidance screen control and real-time update of road conditions, the road condition information monitoring function of the LED display is increased, and the overall refresh rate of the LED display and the recognition accuracy of dynamic target vehicles are increased, thereby better Improve the practicability of the traffic guidance screen and the effect of road condition monitoring.

Contents of the invention

A distributed dynamic monitoring traffic guidance screen control system establishes a distributed traffic guidance screen control module, wherein the distributed traffic guidance screen control module performs dynamic information and Combined control of static information.

Preferably, the distributed traffic guidance screen control module divides the LED display screen into different display modules with multiple resolutions; wherein each module controls the display through a separate control board, and is matched with an independent RFID communication device; At the same time, the modules are uniformly dispatched by the main control module as a remote control center.

Preferably, in the described distributed traffic guidance screen control module, each display module only intercepts the information used to display the image in the signal, and after buffering the information used to display the image through the double-rate synchronous dynamic random access memory, through The FPGA driver generates high refresh rate display signals.

Preferably, the distributed traffic guidance screen control module includes a traffic buckle monitoring module, a real-time road condition update module, a guidance information reminder module and a real-time command and dispatch module.

Preferably, the distributed traffic guidance screen control module collects road traffic information by establishing an intelligent control method based on multi-sensor fusion; the multi-sensor fusion includes the fusion of camera sensors, voice-activated sensors, photoelectric sensors, and speed radars .

Preferably, the photoelectric sensor establishes a light intensity adaptive adjustment algorithm; the light intensity adaptive adjustment algorithm converts the intensity of ambient light into a voltage through a photoresistor by sensing changes in ambient light; when When the intensity of ambient light is strong, the control system outputs high voltage, and the brightness of the LED display is enhanced; when the intensity of ambient light is strong in rainy and foggy days, the control system outputs low voltage, and the brightness of the LED display decreases.

Preferably, the real-time road condition update module monitors the information of moving vehicles in the road section in real time by establishing a dynamic target monitoring method.

Preferably, in the dynamic target monitoring method, the camera monitors two consecutive frames of dynamic vehicle image information, and obtains the corresponding moving vehicle target image through differential calculation.

Preferably, the control system further includes a background manual monitoring module; the background manual monitoring module updates and corrects the text displayed on the traffic guidance screen in real time by acquiring multi-sensor fusion data.

Preferably, the traffic guidance screen control system realizes real-time communication and update of remote information through GPRS/5G signals.

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

(1) The present invention has established a distributed-based traffic guidance screen processing system, by dividing the LED display screen into multi-resolution display modules, and using a separate control board to control the display, increasing the display and monitoring functions of the LED display screen, Improve the use stability and interchangeability of the traffic guidance screen, facilitate the disassembly and maintenance of the display screen, and at the same time, in each display module, only the information used to display the image in the signal is intercepted, and the information used to display the image is doubled After the speed synchronization DRAM is cached, the refresh rate and information update frequency of the LED display are improved through the FPGA driver, and the real-time performance of the LED display for road condition monitoring is improved.

(2) The present invention establishes a dynamic road condition monitoring method based on multi-sensor fusion, monitors the moving vehicle information in the road section in real time, monitors the image information of two consecutive frames of dynamic vehicles by using the camera sensor, and uses differential calculation to obtain the corresponding moving vehicle target The image improves the accuracy and real-time performance of the traffic guidance screen processing system for road monitoring.

(3) The present invention systematically perceives different illuminations within a day by establishing an adaptive light intensity adjustment algorithm, reasonably adjusts the brightness of the LED display, and avoids affecting the driver's visual effect due to the brightness factor of the LED display.

Description of drawings

Figure 1 is a block diagram of a distributed dynamic monitoring traffic guidance screen control system.

Detailed ways

A distributed dynamic monitoring traffic guidance screen control system establishes a distributed traffic guidance screen control module, wherein the distributed traffic guidance screen control module performs dynamic information and Combined control of static information.

In a preferred embodiment, the dynamic information is a scrolling display of a slogan, and the static information is a fixed display of a designated slogan.

In one embodiment, the distributed traffic guidance screen control module divides the LED display screen into different display modules with multiple resolutions; wherein each module controls the display through a separate control board, and is matched with an independent RFID communication device; at the same time, the modules are uniformly dispatched by the main control module as a remote control center.

In one embodiment, in the described distributed traffic guidance screen control module, each display module only intercepts the information used to display the image in the signal, and processes the information used to display the image through a double-rate synchronous dynamic random access memory. After caching, a high refresh rate display signal is generated through the FPGA driver.

In one embodiment, the distributed traffic guidance screen control module includes a traffic buckle monitoring module, a real-time road condition update module, a guidance information reminder module and a real-time command and dispatch module.

In a preferred embodiment, the traffic buckle monitoring module is used to monitor the driving conditions of passing vehicles and drivers in real time by setting camera sensors and speed measuring radars. Send to background artificial monitoring module, update illegal information on LED display screen simultaneously; Described road condition real-time update module is by establishing section dynamic road network map, road situation is dynamically updated, and described dynamic update is road congestion and road construction Real-time reminder function; the described guidance information reminding module is the display of driving safety warnings and road condition reminding slogans; the described real-time command and dispatch module, for the occurrence of traffic accidents in the road, or the traffic congestion caused by environmental factors, can play command Dispatching information temporarily adjusts and guides road vehicles for emergency treatment.

In one embodiment, the distributed traffic guidance screen control module collects road traffic information by establishing an intelligent control method based on multi-sensor fusion; the multi-sensor fusion includes a camera sensor, a voice control sensor, a photoelectric sensor, Fusion of speed radar.

In a preferred embodiment, the camera sensor is used to record the driving information of passing vehicles, thereby judging road condition information and recording violations; the voice-activated sensor is used to record the noise value of passing vehicles. Prohibit the whistle area and time, avoid passing vehicles whistle; the photoelectric sensor is used to obtain the ambient light changes within a day, and increase the brightness of the LED display in real time according to the intensity of the ambient light; the speed radar is used to Measure the speed of passing vehicles and avoid speeding.

In one embodiment, the photoelectric sensor establishes a light intensity adaptive adjustment algorithm; the light intensity adaptive adjustment algorithm converts the intensity of ambient light into a voltage through a photoresistor by sensing changes in ambient light When the intensity of ambient light is strong, the control system outputs high voltage, and the brightness of the LED display is enhanced; when the intensity of ambient light is low in rainy and foggy days, the control system outputs low voltage, and the brightness of the LED display decreases.

In one embodiment, the real-time road condition update module monitors the information of moving vehicles in the road section in real time by establishing a dynamic target monitoring method.

In one embodiment, the dynamic target monitoring method,

Specifically, the main steps are:

S1. Collect two consecutive frames of images of the moving vehicle through the camera sensor;

S2. Perform adjustments based on image size, exposure, graphic distortion, and noise filtering on the images of two consecutive frames of moving vehicles collected;

S3. Convert the adjusted two consecutive frames of images of the moving vehicle into a pixel matrix mode, and perform difference calculation on the converted two consecutive frames of images of the moving vehicle;

S4. Using the feature points of the overlapped part in the images of the two consecutive frames of the moving vehicle after the difference calculation as the overlap feature, extract the overlap feature and establish a feature matching factor;

S5. Continuously capture images of moving vehicles in the road section through the camera sensor, and repeat the above steps to calculate the maximum feature matching factor of the moving vehicle in the road section, and extract two consecutive frames of images of the moving vehicle corresponding to the maximum feature matching factor as the identified moving vehicle target image.

In one embodiment, the control system further includes a background manual monitoring module; the background manual monitoring module updates and corrects the text displayed on the traffic guidance screen in real time by acquiring multi-sensor fusion data.

In one embodiment, the traffic guidance screen control system realizes real-time communication and update of remote information through GPRS/5G signals.

In a preferred embodiment, the outer ring of the traffic guidance screen is equipped with a reflective strip structure, and a double-layer fully waterproof box is used to avoid corrosion of the traffic guidance screen shell caused by rain and fog. At the same time, the traffic guidance screen is installed inside There are power supply lightning protection and signal lightning protection devices to better protect the real-time transmission of the signal of the traffic guidance screen; at the same time, the traffic guidance screen can be driven by solar power generation and alternating current power generation. When using electric energy, AC power is used to drive and assist, saving the overall energy consumption of the traffic guidance screen.

Claims (10)

1. A distributed dynamic monitoring traffic guidance screen control system is characterized in that a distributed traffic guidance screen control module is established; the distributed traffic guidance screen control module controls the display signals of the plurality of LED display screens in a distributed mode to carry out combined release of dynamic information and static information.

2. The distributed dynamic monitoring traffic guidance screen control system according to claim 1, wherein the distributed traffic guidance screen control module divides the LED display screen into different display modules with various resolutions; wherein, each module controls display through an independent control panel and is matched with an independent RFID communication device; meanwhile, the modules are uniformly scheduled by taking the main control module as a remote control center.

3. The distributed dynamic monitoring traffic guidance screen control system according to claim 2, wherein in the distributed traffic guidance screen control module, each display module only intercepts information for displaying images in the signals, and generates high-refresh-rate display signals through FPGA driving after the information for displaying the images is cached by a double-rate synchronous dynamic random access memory.

4. The distributed dynamic monitoring traffic guidance screen control system according to claim 2 or 3, wherein the distributed traffic guidance screen control module comprises a traffic buckle monitoring module, a road condition real-time updating module, a guidance information reminding module and a real-time commanding and scheduling module.

5. The distributed dynamic monitoring traffic guidance screen control system according to claim 4, wherein the distributed traffic guidance screen control module collects road traffic information by establishing an intelligent control method based on multi-sensor fusion; the multi-sensor fusion comprises the fusion of a camera sensor, a sound control sensor, a photoelectric sensor and a speed measuring radar.

6. The distributed dynamic monitoring traffic guidance screen control system according to claim 5, wherein the photoelectric sensor establishes a light intensity adaptive adjustment algorithm; the light intensity self-adaptive adjustment algorithm converts the intensity of the ambient light into the magnitude of voltage through the photoresistor by sensing the change of the ambient light; when the intensity of the ambient light is stronger, the control system outputs high voltage, and the brightness of the LED display screen is enhanced; when the intensity of the ambient light is lower in rainy and foggy days, the control system outputs low voltage, and the brightness of the LED display screen is weakened.

7. The distributed dynamic monitoring traffic guidance screen control system according to claim 4, wherein the real-time road condition updating module monitors information of moving vehicles in a road section in real time by establishing a dynamic target monitoring method.

8. The distributed dynamic monitoring traffic guidance screen control system according to claim 7, wherein the dynamic target monitoring method monitors image information of two continuous frames of dynamic vehicles through a camera sensor, and obtains corresponding moving vehicle target images through differential calculation.

9. The distributed dynamic monitoring traffic guidance screen control system according to claim 1, wherein the control system further comprises a background manual monitoring module; the background manual monitoring module updates and corrects the displayed characters of the traffic guidance screen in real time by acquiring multi-sensor fusion data.

10. The distributed dynamic monitoring traffic guidance screen control system according to claim 1, wherein the traffic guidance screen control system realizes real-time communication and update of remote information through GPRS/5G signals.

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