A roadside traffic signal data acquisition and processing system and method

Abstract

The application introduces a roadside traffic signal data acquisition and processing system and method, wherein the roadside traffic signal data acquisition and processing system comprises: a traffic signal controller for controlling the traffic light at the road intersection; and a signal protocol conversion device for acquiring the data of the traffic signal controller and sending the acquired data to a data center. The signal protocol conversion device comprises a voltage acquisition unit for acquiring the voltage data in the traffic signal controller and a pulse detection unit for acquiring the pulse data in the traffic signal controller, and the voltage acquisition unit and the pulse detection unit are connected with the traffic signal controller respectively. Based on the above system design, the roadside traffic signal data acquisition and processing method designed by the application has the advantages of wide voltage acquisition range, high acquisition frequency, short processing time, wide adaptability and high reliability.

Description

Technical Field

[0001] This invention relates to the fields of intelligent connected vehicle electronics and transportation technology, specifically to a roadside traffic signal data acquisition and processing system and method. Background Technology

[0002] With the rapid development of the intelligent connected vehicle industry in recent years, the application of V2X testing scenarios in connected vehicles has become increasingly in-depth and sophisticated, both in closed and open road testing areas. However, with the continuous development and in-depth application of automotive electronics, sensor, image processing chip, and artificial intelligence technologies in connected vehicles, existing roadside traffic signal protocol conversion systems and methods are gradually revealing their shortcomings due to time and generational limitations, as well as the extensive application and testing of cutting-edge technologies in connected vehicles. These shortcomings include small voltage acquisition range, long processing time, low acquisition frequency, inability to perform time synchronization, and large latency. These shortcomings are far from meeting the test data requirements of connected vehicles in terms of both functionality and performance. Therefore, a significant update and improvement of existing roadside traffic signal protocol conversion systems and methods is urgently needed.

[0003] Chinese patent CN109903568A discloses a traffic signal data transmission method and a traffic signal control system. In this method, a network arbitration module obtains the network status of the fiber optic communication line and determines its current operating status. If the fiber optic communication line is not functioning properly, the traffic signal data is transmitted to the physical layer of the central traffic signal control subsystem using the fiber optic communication line. Simultaneously, a wireless communication line is used to transmit the traffic signal data to the virtual layer of the central traffic signal control subsystem. After receiving the traffic signal data, the central traffic control subsystem extracts the time information, integrates the traffic signal data from the physical and virtual layers according to the time information, and saves it to a storage module. This method and system can prevent the loss of traffic signal data and ensure that the central traffic signal control subsystem can control the traffic signal controllers in real time. However, it does not effectively solve the problem of data acquisition time delay.

[0004] In addition, Chinese patent CN108648486B discloses a roadside traffic signal protocol conversion system and method for intelligent connected vehicles. This system includes: a traffic signal controller for controlling traffic lights at road intersections; a signal protocol conversion device for acquiring data from the traffic signal controller via hardware ports and serial ports, sending the read signal data to a data center, and converting it into an industry standard protocol or a customized protocol after protocol parsing; and DSRC and LTE-V devices for receiving data sent by the signal protocol conversion device and transmitting it wirelessly to the vehicle-mounted equipment. However, this solution cannot collect actual voltage values; it can only collect the high and low levels after voltage conversion. When the traffic light is actually in a weak state (e.g., actual voltage 120V-180V), it will be considered off, ultimately leading to a large error in the calculated timing scheme data. Furthermore, the hardware also limits the voltage collected, only collecting high and low levels, resulting in significant latency issues. Actual testing shows a latency greater than 200ms, which greatly affects the test data requirements of connected vehicles.

[0005] To address the time delay and limited voltage range issues in traffic signal data acquisition, a roadside traffic signal data acquisition and processing system and method will be designed to reduce the demand for test data on connected vehicles. Summary of the Invention

[0006] To address the issues of time delay and limited voltage range in traffic signal data acquisition, this invention presents a roadside traffic signal data acquisition and processing system and method.

[0007] A roadside traffic signal data acquisition and processing system includes: a traffic signal controller, a signal protocol conversion device, a data center, an NTP server, LTE-V equipment, and network communication equipment;

[0008] The traffic signal controller is used to control the traffic lights at road intersections;

[0009] The signal protocol conversion device is used to acquire data from the traffic signal controller and send the acquired data to the data center.

[0010] The signal protocol conversion device includes a voltage acquisition unit and a pulse detection unit;

[0011] The voltage acquisition unit and the pulse detection unit are respectively connected to the traffic signal controller;

[0012] The voltage acquisition unit is used to acquire voltage data from the traffic signal controller.

[0013] The pulse detection unit is used to collect pulse data from the traffic signal controller.

[0014] The NTP server is used to synchronize time with the signal protocol conversion device;

[0015] The LTE-V device is used to receive data sent by the signal protocol conversion device and send the data to the vehicle-mounted equipment;

[0016] The network communication device is used to receive data terminals sent by the signal protocol conversion device via 4G and / or 5G network communication.

[0017] Preferably, the signal protocol conversion device further includes a control system unit and a data input unit, a data storage unit, an NTP time synchronization unit, a Beidou / GPS module unit, a 4G / 5G network communication module, a data output unit, an LCD display unit, a communication module unit, and an OTA remote upgrade unit, all connected to the control system unit.

[0018] Preferably, the data output unit is also connected to the LTE-V device and the network communication device respectively, and the data output unit includes an LTE-V interface and a network communication interface.

[0019] Preferably, the signal protocol conversion device acquires voltage and pulse data from the traffic signal controller via a hardware interface.

[0020] Preferably, the NTP time synchronization unit also communicates with the signal protocol conversion device and the NTP server respectively, and synchronizes the time of the signal protocol conversion device and the NTP server.

[0021] Preferably, the BeiDou / GPS module unit communicates with the signal protocol conversion device and provides it with time synchronization and positioning.

[0022] Preferably, the 4G / 5G network communication module communicates with the signal protocol conversion device and completes cross-regional data transmission wirelessly via the public network.

[0023] A method for collecting and processing roadside traffic signal data includes the following steps:

[0024] S1: The control system unit obtains the location information of the signal protocol conversion device through the Beidou / GPS module unit and sets the time for the protocol conversion device;

[0025] S2: The NTP time synchronization unit communicates with the NTP server periodically to complete time synchronization;

[0026] S3: The control system unit acquires the traffic signal status of the intersection traffic signal controller through the voltage acquisition unit and pulse detection unit, and analyzes and calculates the traffic signal status to obtain traffic signal data;

[0027] S4: The control system unit filters, identifies, and stores the traffic signal data, records, displays, and converts the stored traffic signal data, and sends the converted traffic signal data to the LTE-V device through the data output unit;

[0028] S5: The LTE-V device transmits traffic signal data to the vehicle-mounted equipment via wireless transmission;

[0029] S6: The control system unit sends the converted traffic signal data to other network communication devices, including vehicle-mounted network communication devices, via the 4G / 5G network communication module.

[0030] Preferably, step S3 includes the following steps:

[0031] S31: The signal protocol conversion device and the traffic signal controller are connected via a hard-wired connection;

[0032] S32: The signal protocol conversion device determines the working status of the traffic light by collecting the voltage value information and pulse information of the traffic light group terminals;

[0033] S33: The signal protocol conversion device analyzes and calculates the timing scheme information of the current traffic signal controller based on the voltage and pulse state patterns of the lamp group terminals.

[0034] Preferably, S32 includes:

[0035] S321: Real-time reading of the actual voltage value of each signal light group, with the reading frequency set to 50Hz; Real-time detection and identification of the pulse of each signal light group, with the reading frequency set to 50Hz.

[0036] S322: Set the valid range of voltage values ​​collected by each traffic light group, and identify the valid set of traffic lights by referring to the predefined driving direction corresponding to each traffic light group.

[0037] Preferably, S33 includes:

[0038] S331: The control system unit times the power-on and power-off time of the valid signal light group terminals. Based on the regular changes in voltage at the signal light group terminals, it obtains the current operating signal cycle, the color status of the signal lights included in each valid direction, the running time, and the remaining time, and provides a countdown.

[0039] S332: The control system unit detects whether there is a pulse signal on the valid signal light terminal, and corrects the acquired running time, remaining time and cycle duration of the signal light based on the detected pulse signal;

[0040] S333: Obtain signal timing scheme information such as the duration of the next cycle, the direction of each light group, and the duration of the light color.

[0041] Preferably, step S4 includes the following steps:

[0042] S41: Identify and store the traffic signal controller data calculated in S33;

[0043] S42: Filter the stored data and extract the effective timing scheme information;

[0044] S43: Perform various protocol conversions on the extracted valid timing scheme information, including converting it into a data format for communication with the LCD display unit, displaying the timing scheme, converting it into a data format for communication with the data center, and transmitting it, and converting it into a data format for communication with LTE-V equipment, and transmitting it.

[0045] Preferably, step S43 includes the following steps:

[0046] S431: The signal protocol conversion device actively sends traffic signal data, equipment status data, fault records, and operation logs to the platform center through the communication module unit, and performs cyclic overlay and display.

[0047] S432: The big data center requests one or more of the following data from the signal protocol conversion device through the communication module unit: timing scheme, fault record, and operation log.

[0048] Compared with the prior art, the beneficial effects of the present invention are:

[0049] 1. This application achieves the technical effect of a wide range of voltage acquisition by real-time detection of traffic signal light terminal voltage and pulse. Moreover, the voltage detection range designed in this application is AC 0~275V, which is higher than the AC 220V±20% voltage value output by traffic signal light terminals specified in the standard.

[0050] 2. The roadside traffic signal data acquisition and processing system designed in this application supports frequency conversion data acquisition, with a maximum acquisition frequency of 50Hz, ensuring the real-time performance of voltage acquisition. Therefore, this application can achieve the technical effect of high-frequency roadside traffic signal data acquisition.

[0051] 3. The roadside traffic signal data acquisition and processing system designed in this application processes the acquired voltage values ​​and pulses in real time, calculates the timing scheme of the traffic signal controller at the fastest speed, and the processing time interval is as fast as 20ms / time. Therefore, this application can achieve the technical effect of short processing time.

[0052] 4. The roadside traffic signal data acquisition and processing system designed in this application adopts a high-performance processor. Based on the high acquisition frequency and short processing time, the latency of a single system is controlled within 50ms, which is much smaller than the latency of existing single systems. Therefore, this application has the technical effect of low latency.

[0053] 5. The roadside traffic signal data acquisition and processing method designed in this application obtains traffic signal timing scheme information by acquiring the terminal voltage and pulse of traffic signal lights through a high-performance processor. In principle, it is compatible with all types of signal lights with AC 220V output voltage, and has the technical effect of wide applicability and wide adaptability.

[0054] 6. The roadside traffic signal data acquisition and processing method designed in this application can set the acquisition voltage range to ensure that the acquired voltage is reliable and effective. At the same time, it adopts the NTP synchronization method to maintain strict time synchronization with interconnected equipment, so that the data arriving at each device is timely, reliable and effective. Therefore, this application has the technical effect of high reliability.

[0055] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the preferred embodiments of this application are described in detail below with reference to the accompanying drawings.

[0056] The above and other objects, advantages and features of this application will become more apparent to those skilled in the art from the following detailed description of specific embodiments in conjunction with the accompanying drawings. Attached Figure Description

[0057] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0058] Figure 1 This is a system framework diagram of a roadside traffic signal data acquisition and processing system according to the present invention;

[0059] Figure 2 This is a diagram illustrating the status acquisition method of a traffic signal controller in a roadside traffic signal data acquisition and processing system.

[0060] Figure 3A flowchart illustrating voltage acquisition and pulse detection and recognition in a roadside traffic signal data acquisition and processing method;

[0061] Figure 4 This is a flowchart illustrating the traffic signal data calculation process of a roadside traffic signal data acquisition and processing method.

[0062] Figure 5 This is a flowchart illustrating the traffic signal control protocol conversion process for a roadside traffic signal data acquisition and processing method.

[0063] Figure 6 A diagram showing the setup and data display structure of a roadside traffic signal data acquisition and processing system;

[0064] Figure 7 This is a data transmission flowchart for a roadside traffic signal data acquisition and processing system;

[0065] Reference numerals: 1. Traffic signal controller; 2. Signal protocol conversion device; 21. Control system unit; 22. Voltage acquisition unit; 23. Pulse detection unit; 24. Data input unit; 25. Data storage unit; 26. NTP time synchronization unit; 27. Beidou / GPS module unit; 28. 4G / 5G network communication module; 29. ​​Data output unit; 3. Data center; 30. LCD display unit; 31. Communication module unit; 32. OTA remote upgrade unit; 4. NTP server; 5. LTE-V equipment; 6. Network communication equipment. Detailed Implementation

[0066] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. In the following description, specific details such as specific configurations and components are provided merely to help fully understand the embodiments of this application. Therefore, those skilled in the art should understand that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. In addition, for clarity and brevity, descriptions of known functions and structures are omitted in the embodiments.

[0067] It should be understood that the phrase "an embodiment" or "this embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this application. Therefore, "an embodiment" or "this embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0068] Furthermore, reference numerals and / or letters may be repeated in different examples within this application. Such repetition is for the purpose of simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or settings discussed.

[0069] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist simultaneously. The term " / and" in this article describes another type of relationship between related objects, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the related objects before and after it are in an "or" relationship.

[0070] In this article, the term "at least one" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, "at least one of A and B" can mean: A exists alone, A and B exist simultaneously, or B exists alone.

[0071] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion.

[0072] Example 1

[0073] To address the current lack of standardized output protocols for roadside traffic signal controllers in the intelligent connected vehicle (V2X) field, and considering the increasing prevalence of new vehicle network testing technologies and in-depth research in recent years, existing roadside traffic signal protocol conversion systems and methods are far from adequate to support current V2X autonomous driving testing operations in terms of acquisition range, acquisition method, acquisition accuracy, latency, reliability, and data transmission methods. This invention provides a roadside traffic signal data acquisition and processing system and conversion method, mainly comprising:

[0074] This invention provides a roadside traffic signal data acquisition and processing system, comprising:

[0075] Traffic signal controller 1: Used to control traffic lights at road intersections;

[0076] Signal protocol conversion device 2: used to acquire data from traffic signal controller 1 and send the acquired data to data center 3;

[0077] The signal protocol conversion device 2 further includes a control system unit 21 and a voltage acquisition unit 22 and a pulse detection unit 23 connected to the control system unit 21 for acquiring voltage data and pulse data in the traffic signal controller 1, respectively. The voltage acquisition unit 22 and the pulse detection unit 23 are respectively connected to the traffic signal controller 1 through hardware ports.

[0078] The voltage acquisition unit 22 reads the actual voltage value of each signal light group in real time, and the reading frequency is set to 50Hz.

[0079] The pulse detection unit 23 detects and identifies the pulses of each signal light group in real time, and the reading frequency is set to 50Hz.

[0080] The control system unit 21 filters and analyzes the data collected in real time by the voltage acquisition unit 22 and the pulse detection unit 23 to find the regular changes, calculates the timing scheme information such as the number of phases of the signal, the current phase light color, the light countdown, and the cycle duration, and stores the timing scheme information in the data storage unit 25 according to the custom protocol format.

[0081] The control system unit 21 extracts, filters, and encapsulates the timing scheme information and then transmits it to the LTE-V device through the data output unit 29.

[0082] The signal protocol conversion device 2 further includes a control system unit 21 and a data input unit 24, a data storage unit 25, an NTP time synchronization unit 26, a Beidou / GPS module unit 27, a 4G / 5G network communication module 28, a data output unit 29, a liquid crystal display unit 30, a communication module unit 31, and an OTA remote upgrade unit 32, all of which are connected to the control system unit 21.

[0083] Furthermore, the data output unit 29 is connected to the LTE-V device 5 and the network communication device 6 respectively, and the data output unit 29 includes an LTE-V interface and a network communication interface.

[0084] Furthermore, the signal protocol conversion device 2 acquires voltage and pulse data from the traffic signal controller 1 through a hardware interface.

[0085] Furthermore, the NTP time synchronization unit 26 communicates with the signal protocol conversion device 2 and the NTP server 4 respectively, and synchronizes the time of the signal protocol conversion device 2 and the NTP server 4.

[0086] Furthermore, the BeiDou / GPS module unit 27 communicates with the signal protocol conversion device 2 and provides timing and positioning services to it.

[0087] Furthermore, the 4G / 5G network communication module 28 communicates with the signal protocol conversion device 2 and completes cross-regional data transmission wirelessly via the public network.

[0088] Furthermore, the NTP server 4 of the roadside traffic signal data acquisition and processing system is used to synchronize time with the signal protocol conversion device 2;

[0089] Network communication device 6: A terminal used to receive data transmitted by the signal protocol conversion device 2 via 4G and / or 5G network communication.

[0090] This application achieves the technical effect of a wide range of voltage acquisition by real-time detection of traffic signal light terminal voltage and pulse. Moreover, the voltage detection range designed in this application is AC 0~275V, which is higher than the AC 220V±20% voltage value output by traffic signal light terminals specified in the standard.

[0091] The roadside traffic signal data acquisition and processing system designed in this application supports frequency conversion data acquisition, with a maximum acquisition frequency of 50Hz, ensuring the real-time performance of voltage acquisition. Therefore, this application can achieve the technical effect of high-frequency roadside traffic signal data acquisition.

[0092] The roadside traffic signal data acquisition and processing system designed in this application processes the acquired voltage values ​​and pulses in real time, and calculates the timing scheme of the traffic signal controller at the fastest speed. The processing time interval is as fast as 20ms / time. Therefore, this application can achieve the technical effect of short processing time.

[0093] The roadside traffic signal data acquisition and processing system designed in this application adopts a high-performance processor. Based on high acquisition frequency and short processing time, the latency of a single system is controlled within 50ms, which is much smaller than the latency of existing single systems. Therefore, this application has the technical effect of low latency.

[0094] Example 2

[0095] A method for collecting and processing roadside traffic signal data includes the following steps:

[0096] S1: The control system unit 21 obtains the location information of the signal protocol conversion device 2 through the Beidou / GPS module unit 27, and sets the time of the protocol conversion device 2;

[0097] S2: NTP time synchronization unit 26 and NTP server communicate and interact periodically to complete the time synchronization between the signal protocol conversion device and the NTP server;

[0098] S3: The signal protocol conversion device 2 and the traffic signal controller 1 are connected by a hard acquisition line, and the voltage acquisition unit 22 and the pulse detection unit 23 acquire the light color status of the traffic lights of the intersection traffic signal controller.

[0099] Specifically, the signal protocol conversion device 2 collects the voltage and pulse information from the traffic signal light group terminals, reads the actual voltage value of each signal light group in real time, and sets the reading frequency to 50Hz; it also detects and identifies the pulses of each signal light group in real time, with the reading frequency set to 50Hz; it sets the effective range of the voltage values ​​collected from each signal light group, and identifies the effective set of signal light groups by referring to the predefined driving direction corresponding to each signal light group.

[0100] In this application, the actual voltage value is collected; the actual voltage value is the same as the voltage value collected. The effective range of voltage collection can be set, for example, AC100-250V. When the collected voltage value is less than 100V, the light is off; when the collected voltage value is greater than 250V, an overvoltage alarm is triggered; and when the voltage is between 100-250V, the light is on. Compared to existing technologies that can only collect the high and low levels after voltage conversion and cannot collect the actual voltage value, when the signal light is actually in a weak state (such as an actual voltage of 120V-180V), it will be considered to be off, ultimately leading to a large error in the calculated timing scheme data.

[0101] The control system unit 21 times the power-on and power-off time of the valid signal light group terminals. Based on the regular changes in voltage at the signal light group terminals, it obtains the current operating signal cycle, the light color status of the signal lights included in each valid direction, the running time, and the remaining time, and provides a countdown.

[0102] The control system unit 21 detects whether there is a pulse signal on the valid signal light group terminals, and corrects the acquired running time, remaining time and cycle duration of the signal light based on the detected pulse signal;

[0103] Obtain signal timing scheme information such as the duration of the next cycle, the direction of each light group, and the duration of the light color.

[0104] S4: The control system unit 21 filters, identifies, and analyzes the traffic signal data, calculates the timing scheme information of the traffic signal controller, such as countdown, cycle duration, and number of phases, and stores it. The stored data is then filtered and the effective timing scheme information is extracted. At the same time, the control system unit 21 records, displays, and converts the stored traffic signal data into a data format that can communicate with the LCD display unit. The timing scheme information of the traffic signal controller and the system log information, including fault information, operation information, and equipment operation information, are recorded and stored, and sent to the LTE-V device 5 through the data output unit for reading and display on the LCD screen.

[0105] Furthermore, the extracted effective timing scheme information undergoes multiple protocol conversions, including conversion into a data format for communication with the LCD display unit, timing scheme display, conversion into a data format for communication with the data center, and transmission, and conversion into a data format for communication with LTE-V equipment, and transmission.

[0106] Furthermore, the signal protocol conversion device 2 actively sends traffic signal data, equipment status data, fault records, and operation logs to the platform center via the communication module unit 31 for cyclic overlay and display.

[0107] Furthermore, the big data center requests one or more data from the signal protocol conversion device 2, including timing scheme, fault records, and operation logs, through the communication module unit 31.

[0108] S5: The control system unit 21 converts the calculated timing scheme information of the traffic signal controller into a data format for communication with the LTE-V equipment, and transmits the timing scheme information of the traffic signal controller to the vehicle equipment wirelessly via the LTE-V equipment.

[0109] S6: The control system unit 21 converts the timing scheme information of the traffic signal controller into a data format for communication with 4G / 5G communication equipment, and transmits the timing scheme information of the traffic signal controller to the network communication equipment, including the vehicle network communication equipment, through the 4G / 5G network communication module 28.

[0110] S7: The OTA remote upgrade unit connects to the OTA platform to enable the updating and upgrading of the signal protocol conversion device.

[0111] The roadside traffic signal data acquisition and processing method designed in this application uses a high-performance processor to acquire traffic signal terminal voltage and pulse information through hardware ports to obtain traffic signal timing scheme information. In principle, it is compatible with all types of signal controllers with AC 220V output voltage, and has wide applicability and broad adaptability.

[0112] The roadside traffic signal data acquisition and processing method designed in this application can set the acquisition voltage range to ensure that the acquired voltage is reliable and effective. At the same time, it adopts NTP synchronization mode to maintain strict time synchronization with interconnected equipment, so that the data arriving at each device is timely, reliable and effective. Therefore, this application has the technical effect of high reliability.

[0113] The above embodiments are merely illustrative of the technical concept and features of the present invention, intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and should not be construed as limiting the scope of protection of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of the present invention is defined by the appended claims rather than the foregoing description, and thus all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within the present invention.

Claims

1. A method for acquiring and processing roadside traffic signal data, characterized in that, Includes the following steps: S1: The control system unit obtains the location information of the signal protocol conversion device through the Beidou / GPS module unit and sets the time for the protocol conversion device; S2: The NTP time synchronization unit communicates with the NTP server periodically to complete time synchronization; S3: The control system unit acquires the traffic signal status of the intersection traffic signal controller through the voltage acquisition unit and pulse detection unit, and analyzes and calculates the traffic signal status to obtain traffic signal data; S4: The control system unit filters, identifies, and stores the traffic signal data, records, displays, and converts the stored traffic signal data, and sends the converted traffic signal data to the LTE-V device through the data output unit; S5: The LTE-V device transmits traffic signal data to the vehicle-mounted equipment via wireless transmission; S6: The control system unit sends the converted traffic signal data to the vehicle network communication equipment via the 4G / 5G network communication module; S3 includes the following steps: S31: The signal protocol conversion device and the traffic signal controller are connected via a hard-wired connection; S32: The signal protocol conversion device determines the working status of the traffic light by collecting the voltage value information and pulse information of the traffic light group terminals; S33: The signal protocol conversion device analyzes and calculates the timing scheme information of the current traffic signal controller based on the voltage and pulse state patterns of the lamp group terminals; S32 includes: S321: Real-time reading of the actual voltage value of each signal light group, with the reading frequency set to 50Hz; Real-time detection and identification of the pulse of each signal light group, with the reading frequency set to 50Hz. S322: Set the effective range of voltage values ​​collected by each traffic light group, and identify the effective set of traffic lights by referring to the predefined driving direction corresponding to each traffic light group; S33 includes: S331: The control system unit times the power-on and power-off time of the valid signal light group terminals. Based on the regular changes in the voltage on the signal light group terminals, it obtains the current operating signal cycle, the light color status of the signal lights included in each valid direction, the running time and the remaining time, and provides a countdown. S332: The control system unit detects whether there is a pulse signal on the valid signal light group terminal, and corrects the acquired signal light running time, remaining time and cycle duration based on the detected pulse signal; S333: Obtain signal timing scheme information for the next cycle duration, direction of each light group, and light color duration.

2. The method for acquiring and processing roadside traffic signal data according to claim 1, characterized in that, S4 includes the following steps: S41: Identify and store the traffic signal controller data calculated in S33; S42: Filter the stored data and extract the effective timing scheme information; S43: Perform various protocol conversions on the extracted valid timing scheme information, including converting it into a data format for communication with the LCD display unit, displaying the timing scheme, converting it into a data format for communication with the data center, and transmitting it, and converting it into a data format for communication with LTE-V equipment, and transmitting it.

3. The method for acquiring and processing roadside traffic signal data according to claim 2, characterized in that, S43 includes the following steps: S431: The signal protocol conversion device actively sends traffic signal data, equipment status data, fault records, and operation logs to the platform center through the communication module unit, and performs cyclic overlay and display. S432: The big data center requests one or more of the following data from the signal protocol conversion device through the communication module unit: timing scheme, fault record, and operation log.

4. A roadside traffic signal data acquisition and processing system, used to execute the method according to any one of claims 1-3, characterized in that, include: Traffic signal controllers, signal protocol conversion devices, data centers, NTP servers, LTE-V equipment, and network communication equipment; The traffic signal controller is used to control the traffic lights at road intersections; The signal protocol conversion device is used to acquire data from the traffic signal controller and send the acquired data to the data center. The signal protocol conversion device includes a voltage acquisition unit and a pulse detection unit; The voltage acquisition unit and the pulse detection unit are respectively connected to the traffic signal controller; The voltage acquisition unit is used to acquire AC voltage data of 0~275V from the traffic signal controller; The pulse detection unit is used to collect pulse data; The signal protocol conversion device further includes a control system unit, which is used to fuse the voltage data collected by the voltage acquisition unit and the pulse data collected by the pulse detection unit to calculate the traffic signal timing scheme. The NTP server is used to synchronize time with the signal protocol conversion device; The LTE-V device is used to receive data sent by the signal protocol conversion device and send the data to the vehicle-mounted equipment; The network communication device is used to receive data sent by the signal protocol conversion device through the 4G / 5G network communication module, and complete cross-regional data transmission through the public network in a wireless manner.

5. The roadside traffic signal data acquisition and processing system according to claim 4, characterized in that, The signal protocol conversion device further includes a control system unit and a data input unit, a data storage unit, an NTP time synchronization unit, a Beidou / GPS module unit, a 4G / 5G network communication module, a data output unit, an LCD display unit, a communication module unit, and an OTA remote upgrade unit, all connected to the control system unit. The data output unit is also connected to the LTE-V device and the network communication device respectively, and the data output unit includes an LTE-V interface and a network communication interface; The voltage acquisition unit and pulse detection unit in the signal protocol conversion device acquire voltage data and pulse data from the traffic signal controller through a hardware interface. The NTP time synchronization unit also communicates with the signal protocol conversion device and the NTP server respectively, and synchronizes the time of the signal protocol conversion device and the NTP server; The BeiDou / GPS module unit communicates with the signal protocol conversion device and provides it with time synchronization and positioning.

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