A multi-mode signal light control system

Abstract

The application discloses a multi-mode signal lamp control system, and relates to the technical field of intelligent traffic, which is mainly used for road vehicle release control, and focuses on improving the stability of signal machine operation in the hardware design and control mode, and the system comprises a signal machine and a handheld device, wherein the signal machine is provided with a socket special for the handheld device; when the handheld device is installed on the signal machine and sends a signal control takeover instruction to the signal machine, the signal machine executes a preset release scheme issued by the handheld device to control the connected signal lamp. The system guarantees the stability of the signal machine in multiple aspects, provides a quick release scheme import function, and provides a hardware guarantee for the rapid recovery of traffic order.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of intelligent transportation, in particular to a multi-mode signal lamp control system. BACKGROUND

[0002] The signal control machine is a special device for controlling the road red and green signal lamp (hereinafter referred to as signal machine). In order to ensure that the red and green lights do not completely turn off or become chaotic when the signal machine fails, a yellow flashing controller is additionally matched. When the signal machine is damaged or dead, the yellow flashing controller can take over the control right and make the red and green lights at the intersection flash yellow at the same time, which ensures the safety of traffic to a certain extent. However, this mode is not sufficient for intersections with heavy traffic, and this response measure is also very limited and cannot well solve the release problem after the control machine fails.

[0003] In addition, when part of the signal system equipment at the intersection fails or the signal system cannot make the optimal response scheme due to large traffic volume at the intersection, the intersection will generally use the traffic police on-site manual release control mode for traffic guidance. However, manual release is low in efficiency and requires personnel to be stationed, and this mode cannot meet the development requirements of the signal system. SUMMARY

[0004] The present application relates to the technical field of intelligent transportation, in particular to a multi-mode signal lamp control system.

[0005] A multi-mode signal lamp control system, comprising a signal machine and a handheld device, the signal machine is provided with a socket special for the handheld device; when the handheld device is installed on the signal machine and sends a signal control takeover instruction to the signal machine, the signal machine executes the preset release scheme issued by the handheld device to control the connected signal lamp.

[0006] Further technical solutions are that the signal machine comprises a computing unit, a control unit and a power supply unit. The computing unit is the core of the signal machine and is used for analyzing and calculating the acquired traffic data, designing and planning the release scheme, and outputting the release scheme to the control unit. The control unit realizes communication between the computing unit and each signal lamp, scheme execution and scheme recording. When the computing unit is offline or fails, the control unit is used for comprehensively analyzing the recorded release scheme to obtain an emergency release scheme and execute it, thereby realizing the takeover of the control right.

[0007] Further technical solutions are that the arrangement order of the control priority of each unit in the multi-mode signal lamp control system is: the handheld device is higher than the computing unit, and the computing unit is higher than the control unit.

[0008] The beneficial technical effect of the present application is:

[0009] By reasonably designing the priority order of the signal lamp control of the computing unit and the control unit in the handheld device and the signal machine, when any part is damaged, the signal lamp can be guaranteed to operate normally and stably, and the release scheme closest to the normal working time can be executed. Using the control system, there is no need to arrange personnel to guard at the abnormal intersection, which greatly reduces the labor cost. The signal machine adopts modular design, which can be quickly repaired, and at the same time, during the maintenance process, the signal lamp can continue to execute the preset release scheme through the handheld device, reducing the operation and maintenance difficulty and reducing the traffic accidents in the intersection equipment maintenance process. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is the principle diagram of the multi-mode signal lamp control system provided by the present application.

[0011] Figure 2 is the schematic diagram of the handheld device provided by the present application.

[0012] Figure 3 is the schematic diagram of the signal machine structure provided by the present application.

[0013] Figure 4 is the internal connection schematic diagram of the signal machine provided by the present application.

[0014] Figure 5 is the power supply unit connection schematic diagram provided by the present application.

[0015] Figure 6 is the control priority schematic diagram provided by the present application.

[0016] Figure 7 is the control unit emergency scheme decision flow chart provided by the present application.

[0017] Figure 8 is the driving control module running flow logic diagram provided by the present application. DETAILED DESCRIPTION

[0018] The specific embodiments of the present application will be further described below in combination with the drawings.

[0019] The present embodiment provides a multi-mode signal lamp control system, which can provide multiple sets of backup control modes. As shown in Figure 1As shown, the control system includes a signal machine and a handheld device, and the signal machine is also connected with each signal lamp through an RS485 bus. The signal machine is provided with a socket special for the handheld device. When the handheld device is installed on the signal machine and sends a signal control takeover instruction to the signal machine, the signal machine executes the preset release scheme issued by the handheld device to control the connected signal lamp. The design aims to enable the police or maintenance personnel to timely install the handheld device to take over when the intersection appears release abnormity, whether the abnormity belongs to vehicle flow detection part abnormity, signal system device fault abnormity, signal system function or performance defect abnormity, and the personnel do not need to be stationed at the abnormal intersection for manual control, thereby greatly reducing the labor cost.

[0020] The signal lamp is a special red and green signal lamp matched with the signal machine. The most important difference from other red and green lamps is that it is controlled through a bus using a special protocol. This part is not the focus of the application and is only used as a matched device of the signal machine, but it is an important component for realizing the function of the signal machine.

[0021] As shown in Figure 2 , the handheld device 1 includes a touch display screen, Bluetooth, GPS, type-C interface, etc., which is used to provide configuration information and import functions of the signal machine for users, maintenance and installation personnel, and operate the preset release scheme as a temporary signal machine when the signal machine fails.

[0022] As shown in Figure 3 , Figure 4 , the signal machine adopts a modular design, so that each module can be quickly repaired. At the same time, during the repair process, the signal lamp can continue to execute the preset release scheme through the handheld device, thereby reducing the operation and maintenance difficulty and reducing traffic accidents during the maintenance and repair of intersection devices. The signal machine includes a computing unit 2, a control unit 3, a display unit 4 and a power supply unit 5. Among the components of the signal machine, the computing unit 2 is the core of the signal machine, which is used to analyze and calculate the traffic data provided by the traffic flow detection device, nearby signal machines and the center platform. The unit itself has strong computing power to design and plan the release scheme and output the release scheme to the control unit 3.

[0023] Control unit 3 primarily handles communication between the computing unit and each traffic light, scheme execution, and scheme recording. Its core function is to achieve the final execution of the scheme. When computing unit 2 is offline or malfunctions, control unit 3 performs comprehensive analysis of the recorded release schemes to obtain an emergency release scheme and executes it to continue controlling the traffic lights, thus taking over control. Control unit 3 contains two completely independent drive control modules. The drive control modules adopt a dual-backup, dual-link redundancy design to maximize the stability of the traffic lights. Furthermore, due to their use of low-speed microcontrollers, the circuit design is simple, providing support for stable module operation. Additionally, control unit 3 expands the handheld device's Type-C interface via a USB hub, enabling connection between the two drive control modules and the handheld device. The two drive control modules are connected to external traffic lights via an RS485 bus. Furthermore, computing unit 2 and the two drive control modules are connected via an SPI bus.

[0024] Furthermore, the control priority of drive control module I is higher than that of drive control module II. Drive control module I and drive control module II periodically send status codes to the other drive control module via the SPI bus. During normal operation, drive control module I executes the release scheme, while drive control module II monitors the externally transmitted data (i.e., RS485 bus data) in real time, verifies the data content, and feeds it back to drive control module I, thereby ensuring the consistency between the scheme content and the execution data.

[0025] Display unit 4 is mainly used for displaying signal status and statistical information, as well as inputting and displaying configuration information. Display unit 4 is connected to computing unit 2 to realize the human-computer interaction function of computing unit 2.

[0026] Combination Figure 3 , Figure 5 As shown, power supply unit 5 includes power supply 1 51 and power supply 2 52. Power supply 1 51 supplies power to the entire signal controller, while power supply 2 52 supplies power to the two drive control modules of control unit 3 in the event of a failure of power supply 1. Since the autonomous scheme execution function of the drive control module is the last guarantee for the continuous operation of the signal controller in the event of a failure, power supply 2 52 only supplies power to the drive control module. This separate power supply ensures the stability of the module and avoids situations such as short circuits in other modules affecting the power supply and operation of the drive control module.

[0027] The working principle of the whole control system is described as follows: the signal machine computing unit 2 makes a scheme decision, and transmits the scheme to the two drive control modules of the control unit 3 through the SPI bus, the drive control modules record and execute the scheme, and send the light-on instruction to the signal light, so as to realize the light-on, flashing and switching of the traffic light. Among them, the computing unit 2 of the signal machine, the control unit 3 and the handheld device 1 can take over the bus under different conditions, and the state codes are transmitted through the bus to ensure the consistency of the decision-making among each other. As shown in Figure 6 The arrangement order of the control priority of each unit in the multi-mode signal light control system is: the handheld device 1 is higher than the computing unit 2, and the computing unit 2 is higher than the control unit 3.

[0028] The handheld device 1 is placed on the signal machine handheld device dedicated socket, when the control unit 3 detects that the handheld device 1 is online and issues a signal control takeover instruction, the control unit 3 feeds back a first state code to the computing unit 2 through the SPI bus, at this time the handheld device 1 obtains the highest control right, and no matter whether the computing unit 2 sends a release scheme, the control unit 3 will not receive the scheme, wherein the first state code is used to inform the computing unit 2 that the control unit 3 needs to execute the preset release scheme provided by the handheld device 1 at this time, and cannot execute the release scheme sent by the computing unit 2. This control mode is equivalent to allowing the traffic police and the maintenance personnel to install a backup controller through the reserved interface to the signal machine when the signal machine fails, so as to realize the rapid recovery of most functions of the signal machine. After the maintenance is completed or the temporary takeover is ended, the handheld device 1 can be directly pulled out, when the control unit 3 detects that the handheld device 1 is offline or the signal control takeover instruction is invalid, the control unit 3 feeds back a second state code to the computing unit 2 through the SPI bus, at this time the computing unit 2 recovers the highest control right, and the second state code is used to inform the computing unit 2 that the control unit 3 executes the release scheme sent by the computing unit 2 at this time.

[0029] The specific access and exit process is described as follows:

[0030] Step 1: the handheld device 1 is connected to the signal machine, and the takeover function is turned on;

[0031] Step 2: the control unit 3 stops running the release scheme sent by the computing unit 2, and executes the preset release scheme sent by the handheld device 1;

[0032] Step 3: the handheld device 1 is disconnected, or the takeover function is turned off;

[0033] Step 4: the control unit 3 re-receives and executes the release scheme sent by the computing unit 2.

[0034] When the handheld device 1 is unplugged or the signal control takeover function is turned off, the computing unit 2 has the highest priority, and the display of the signal lamp will be sent to each signal lamp in turn and executed according to the release scheme calculated by the computing unit 2 and parsed by the control unit 3; at this time, the signal machine is in a normal working state, and the related top-level functions can play a role in this case, such as regional control, green wave band control, and vehicle flow overflow control.

[0035] When the computing unit 2 is unplugged offline or fails, and the handheld device 1 is offline or does not issue a signal control takeover instruction, the control unit 3 obtains the highest control right. The control unit 3 records the release scheme of the last N (such as 10) release periods while executing the release scheme issued by the computing unit 2 or the handheld device 1, and obtains the average release time of each direction by accumulating and averaging the single-period release time of each direction, and comprehensively obtains an emergency release scheme for executing the emergency release scheme when taking over the control right. This control mode maximizes the release state of the computing unit 2 before failure, crash, or damage, but if the control unit 3 does not successfully execute the release scheme issued by the computing unit 2 or the handheld device 1, the control unit 3 will execute the imported preset emergency scheme. The decision flow of the specific emergency scheme is referred to Figure 7 .

[0036] In addition, in any control mode, the two sets of drive control modules in the control unit 3 will real-time mutual transmission of operation information. When the drive control module I fails or crashes, the drive control module II takes over the control right, and transmits the state information of the drive control module I to the computing unit 2 through the SPI bus, and informs the relevant personnel through the display unit 4 and the network. During the execution of the release scheme by the drive control module I, when the drive control module II fails or crashes, the drive control module I transmits the state information of the drive control module II to the computing unit 2 through the SPI bus, and uploads the service platform end through the network channel of the display unit 4 and the computing unit 2, and informs the maintenance and use personnel, realizes the timely reporting of the failure, ensures the timeliness of the maintenance, improves the stability of the system operation, finally guarantees the smoothness and safety of the intersection, and through this control mode, the control unit 3 does not need strong processing capability, and the optimal scheme can be obtained with minimum cost, and the running logic of the two drive control modules is referred to Figure 8 .

[0037] The above only describes the preferred embodiments of the present application, and the present application is not limited to the above embodiments. It can be understood that other improvements and changes directly derived or thought by those skilled in the art without departing from the spirit and concept of the present application should be considered to be included in the protection scope of the present application.

Claims

1. A multi-mode signal light control system, characterized by, The signal machine and the handheld device, the signal machine is provided with a socket special for the handheld device; when the handheld device is installed on the signal machine and sends a signal control takeover instruction to the signal machine, the signal machine executes the preset release scheme issued by the handheld device to control the connected signal light; The signal machine comprises a computing unit, a control unit and a power supply unit, the computing unit is the core of the signal machine, is used for analyzing and calculating the acquired traffic data, realizing the design and planning of the release scheme, and outputting the release scheme to the control unit; the control unit realizes the communication between the computing unit and each signal light, scheme execution and scheme recording, when the computing unit is offline or fails, the control unit is used for comprehensively analyzing the recorded release scheme to obtain an emergency release scheme and executes, realizing the takeover of the control right; The arrangement order of the control priority of each unit in the multi-mode signal light control system is that the handheld device is higher than the computing unit, and the computing unit is higher than the control unit; The control unit comprises two completely independent drive control modules, and the two drive control modules are connected with the handheld device and external signal light; in addition, the computing unit and the two drive control modules are connected through an SPI bus; When the control unit detects that the handheld device is online and issues the signal control takeover instruction, the control unit feeds back a first state code to the computing unit, at this time, the handheld device obtains the highest control right, and the first state code is used to inform the computing unit that the control unit temporarily needs to execute the preset release scheme provided by the handheld device and cannot execute the release scheme sent by the computing unit; When the control unit detects that the handheld device is offline or the signal control takeover instruction is invalid, the control unit feeds back a second state code to the computing unit, at this time, the computing unit recovers the highest control right, and the second state code is used to inform the computing unit that the control unit executes the release scheme sent by the computing unit; When the computing unit is offline or fails, and the handheld device is offline or does not issue the signal control takeover instruction, the control unit obtains the highest control right; the control unit records the release scheme of the last N release periods while executing the release scheme issued by the computing unit or the handheld device, and obtains the average release time of each direction through the cumulative average of the one-period release time of each direction, and comprehensively obtains an emergency release scheme, which is used to execute the emergency release scheme when the control right is taken over; If the control unit does not successfully execute the release scheme issued by the computing unit or the handheld device, the control unit will execute the imported preset emergency scheme; The control priority of the drive control module I is higher than that of the drive control module II, the drive control module I and the drive control module II send state codes to the other drive control module through the SPI bus at a fixed time, the drive control module I executes the release scheme in normal work, and the drive control module II monitors the transmission data to the outside in real time, checks the data content and feeds back to the drive control module I, so as to ensure the consistency of the scheme content and the execution data; When the drive control module I fails or crashes, the drive control module II takes over the control right and transmits the state information of the drive control module I to the computing unit through the SPI bus; when the drive control module II fails or crashes, the drive control module I transmits the state information of the drive control module II to the computing unit through the SPI bus.

2. The multi-mode signal light control system of claim 1, wherein, The power supply unit includes a No. 1 power supply and a No. 2 power supply, the No. 1 power supply is used for supplying power for the whole signal machine, and the No. 2 power supply is used for supplying power for the control unit when the No. 1 power supply fails.

3. The multi-mode signal light control system of claim 1, wherein, The signal machine further includes a display unit for displaying the state and statistical information of the signal machine and inputting and displaying the configuration information, the display unit is connected with the computing unit to realize the man-machine interaction function of the computing unit.

4. The multi-mode signal light control system of claim 1, wherein, The handheld device contains a touch display screen, Bluetooth, GPS and a type-C interface, which is used for providing the configuration information and import function of the signal machine and operating the preset release scheme as a temporary signal machine when the signal machine fails.

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