A control method for manual signal phase switching of traffic signal control

Abstract

The present invention provides a method for controlling manual signal phase switching for traffic signal control, comprising: obtaining key trigger information from an operating panel and determining the corresponding key type; analyzing the preset key execution content corresponding to the key type based on the current control mode of the signal, and determining the execution result of the key execution content; and switching the signal phase based on the execution result and the current state of the signal. Through embodiments of the present invention, a single-click switch can be made to the desired signal phase direction, providing fast and convenient operation and meeting the demand for rapid switching of manually controlled signals at intersections.

Description

Technical Field

[0001] The present invention relates to the field of traffic equipment control, and in particular to a control method for manual signal phase switching of traffic signal control provided by the present invention. Background Art

[0002] Traffic control, also known as traffic signal control or urban traffic control, relies on traffic police or traffic signal control systems to direct the movement of vehicles and pedestrians according to changing traffic conditions. Traffic control utilizes modern communications, signaling, sensors, monitoring equipment, and computers to accurately organize and regulate moving vehicles, ensuring safe and smooth operation. Traffic control can be categorized into static and dynamic management, with traffic control being the dynamic form of this.

[0003] In the dynamic management of traffic control, automatic control of traffic lights at intersections is usually used to meet traffic control tasks in daily situations, and manual control is used to meet traffic control tasks in special situations. In manual control, the phase structure of traffic lights is often switched in a step-by-step manner, which has low switching efficiency and makes it difficult for operators to accurately locate a signal phase that needs to be released. Summary of the Invention

[0004] The present invention provides a control method for manual signal phase switching of traffic signal control, which can directly jump to the signal phase direction that needs to be released with one click. The operation is fast and convenient, and meets the demand for rapid switching of manual control signals at intersections.

[0005] The present invention provides a method for controlling manual signal phase switching of a traffic signal, comprising:

[0006] Step S1: Obtain key trigger information of the operation panel and determine the corresponding key type;

[0007] Step S2: analyzing the preset key execution content corresponding to the key type based on the current control mode of the signal, and determining the execution result of the key execution content;

[0008] Step S3: switching the phase of the signal according to the execution result and the current state of the signal.

[0009] Preferably, a priority is assigned to each button on the operation panel in advance, and a button priority triggering rule is set.

[0010] Preferably, the analyzing the preset key execution content corresponding to the key type based on the current control mode of the signal machine to determine the execution result of the key execution content includes:

[0011] When the key execution content is control mode switching, it is determined based on the preset key priority triggering rules whether the switching from the current control mode to another control mode corresponding to the key type is allowed. If not allowed, a warning for manually exiting the current mode is issued. If allowed, it is further determined whether the switching work is an immediate switching. If so, the first type of execution result is determined. If not, the delay time required for automatically exiting the current mode is determined, and the second type of execution result is determined based on the delay time;

[0012] When the key execution content is signal control switching under the same control mode, the preset third type of execution result corresponding to the control mode is determined.

[0013] Preferably, the control mode includes a first mode, a second mode and a third mode, wherein:

[0014] In the first mode, when the key trigger information of the operation panel is obtained, the signal light group is controlled by the signal machine according to the corresponding relationship between the key types to execute the signal light off, signal light flashing yellow, signal light all red and mode switching operations respectively;

[0015] When the key trigger information of the operation panel is obtained in the second mode, the signal light group is controlled by the signal machine according to the corresponding relationship of the key type to perform signal stepping and mode switching operations;

[0016] When the key trigger information of the operation panel is obtained in the third mode, the signal guard and mode switching operations are performed by controlling the signal light group through the signal machine according to the corresponding relationship of the key type.

[0017] Preferably, when the key trigger information of the operation panel is obtained in the third mode, controlling the signal light group to perform the signal guard operation through the signal machine according to the corresponding relationship of the key types includes:

[0018] Determine the corresponding key type according to the key trigger information, and further determine whether the triggered key is a direction key;

[0019] If it is a direction button, scan the preset scheduling table, daily plan table or program table for controlling the switching of the traffic lights, and search whether it contains the traffic light phase structure corresponding to the direction button;

[0020] When the signal light phase structure corresponding to the direction button is retrieved, the guard function transition execution phase is entered, and after the guard function transition execution phase is completed, the phase is switched to the corresponding phase and execution begins.

[0021] Preferably, the following rules are followed when searching for the signal light phase structure:

[0022] If the direction button is an opposite direction button, then it is detected whether there is a signal light phase structure that includes both straight and right-turn traffic flows in the two directions passed;

[0023] If the direction button is a single direction button, it is detected whether there is a signal light phase structure including the vehicle flow direction corresponding to the single direction button.

[0024] Preferably, when a traffic light phase structure corresponding to the direction button is retrieved, and the traffic light phase structure corresponding to the direction button in the retrieved schedule, daily plan or plan table is sequentially overlapped with the currently running traffic light phase structure, after the current traffic light phase structure is executed, the guard function transition execution phase is skipped and the execution is directly switched to the corresponding phase to start execution.

[0025] Preferably, when the operator performs manual control through the operation panel, the following operations are performed:

[0026] Obtaining a traffic flow image of the current intersection through a camera at the intersection, and performing recognition analysis on the traffic flow image to determine whether there are special vehicles in the traffic flow image;

[0027] When a special vehicle exists, the special vehicle is tracked and photographed to obtain multiple continuous images, and feature locking analysis is performed on the multiple continuous images to determine whether the special vehicle is performing a mission based on the status of the warning lights of the special vehicle;

[0028] When it is determined that the special vehicle is performing a task, the lane in which the special vehicle is located is determined and the traffic flow direction of the lane is analyzed;

[0029] According to the traffic flow direction of the lane where the special vehicle is located, determining whether the signal light phase structure manually switched by the operator conflicts with the traffic flow direction of the lane where the special vehicle is located;

[0030] If there is a conflict, the operator will be prompted through the operation panel to confirm and then switch.

[0031] Preferably, when the operator performs manual control through the operation panel, the following operations are also performed:

[0032] The camera at the intersection is used to obtain the traffic flow image of the current intersection, and the traffic flow image is identified and analyzed to determine the number of vehicles in each lane;

[0033] According to the number of vehicles on each lane, the outflow time required for all vehicles on the lane to exit the lane is predicted based on a preset vehicle number-outflow time prediction table;

[0034] Determine the shortest outflow time among multiple lanes as a time base, and based on the time base, determine a ratio of the outflow time corresponding to each lane to the time base, and use the ratio as the opening weight of the lane;

[0035] Provide signal light phase structure switching suggestions to operators based on the open weight of each lane.

[0036] Preferably, providing the operator with a signal light phase structure switching suggestion based on the open weight of each lane includes:

[0037] Scan all signal light phase structures in the current schedule, daily plan or program table used to control signal light switching;

[0038] For each signal light phase structure, multiple lanes corresponding to the traffic flow under the signal light phase structure are determined, and the sum of the open weights corresponding to each lane is determined as the priority value of the signal light phase structure;

[0039] Determine the priority value of each signal light phase structure and recommend the operator to switch to the signal light phase structure with the largest priority value.

[0040] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purposes and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings.

[0041] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0043] Figure 1 This is a flowchart of a method for controlling manual signal phase switching of a traffic signal control according to an embodiment of the present invention;

[0044] Figure 2 This is a schematic structural diagram of an operation panel in an embodiment of the present invention;

[0045] Figure 3 Schematic diagram of button function priority in an embodiment of the present invention;

[0046] Figure 4 This is a workflow diagram for the light off / yellow flashing / full red buttons in an embodiment of the present invention;

[0047] Figure 5 This is a flowchart of the manual control button in an embodiment of the present invention;

[0048] Figure 6 This is a workflow diagram under the guard button in an embodiment of the present invention;

[0049] Figure 7 This is a workflow diagram for the direction buttons in an embodiment of the present invention;

[0050] Figure 8 This is a workflow diagram for searching for guard control targets in an embodiment of the present invention. DETAILED DESCRIPTION

[0051] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0052] The present invention provides a method for controlling the phase switching of a manual traffic signal control, referring to Figure 1 ,include:

[0053] Step S1: Obtain key trigger information of the operation panel and determine the corresponding key type;

[0054] Step S2: analyzing the preset key execution content corresponding to the key type based on the current control mode of the signal, and determining the execution result of the key execution content;

[0055] Step S3: switching the phase of the signal according to the execution result and the current state of the signal.

[0056] The working principle and beneficial effects of the above technical solution are as follows: by acquiring key trigger information from the operation panel and determining the corresponding key type; analyzing the preset key execution content corresponding to the key type based on the current control mode of the signal, and determining the execution result of the key execution content; and switching the signal phase based on the execution result and the current state of the signal. This method can directly jump to the signal phase direction that requires clearance with one click, which is fast and convenient operation and meets the needs of rapid switching of manually controlled signals at intersections.

[0057] In a preferred embodiment, referring to Figure 3 , pre-assign a priority to each button on the operation panel and set a button priority triggering rule.

[0058] The working principle and beneficial effects of the above technical solution are as follows: assign a priority to each button on the operation panel in advance, and set a button priority triggering rule. The button priority triggering rule is that a button function with a high priority level can interrupt a button function with a low priority level, while a button function with a low priority level cannot interrupt a button function with a high priority level. For example, the buttons on the panel are divided into first priority buttons, second priority buttons, and third priority buttons, wherein the first priority buttons include light off, yellow flash, and all red buttons, the second priority buttons include manual control and the stepping buttons under it, and the third priority buttons include guard and various direction buttons under it. When the signal control machine is in manual control mode, the light off function is allowed to be used, but the guard function is not allowed to be used. If the guard function needs to be used, it is necessary to exit the manual control mode and switch to the guard mode to use the guard function. This realizes the jump control of the button function, facilitates emergency control, and effectively prevents the operator's misoperation.

[0059] In a preferred embodiment, the analyzing of the preset key execution content corresponding to the key type based on the current control mode of the signal machine to determine the execution result of the key execution content includes:

[0060] When the key execution content is control mode switching, it is determined based on the preset key priority triggering rules whether the switching from the current control mode to another control mode corresponding to the key type is allowed. If not allowed, a warning for manually exiting the current mode is issued. If allowed, it is further determined whether the switching work is an immediate switching. If so, the first type of execution result is determined. If not, the delay time required for automatically exiting the current mode is determined, and the second type of execution result is determined based on the delay time;

[0061] When the key execution content is signal control switching under the same control mode, the preset third type of execution result corresponding to the control mode is determined.

[0062] The working principle and beneficial effects of the above technical solution are as follows: when the key execution content is a control mode switch, based on the preset key priority triggering rules, it is determined whether the switch from the current control mode to another control mode corresponding to the key type is allowed. If not, a warning is issued to manually exit the current mode. If allowed, it is further determined whether the switch is an immediate switch. If so, a first type of execution result is determined. If not, the delay time required for automatically exiting the current mode is determined. The delay time is determined based on the switching time from the current signal light state to the switching to the next signal light phase and a preset safety transition time. The second type of execution result is determined based on the delay time. The first type of execution result is an immediate switch from the current control mode to another control mode corresponding to the key type, and the second type of execution result is a delayed switch from the current control mode to another control mode corresponding to the key type. When the key execution content is a signal control switch within the same control mode, the preset third type of execution result corresponding to the control mode is determined. For example, when the signal control machine is in manual mode, pressing the step button will result in a stepping operation in the manual mode. The above technology can directly jump to the signal phase direction that needs to be released with one click. The operation is fast and convenient, and the execution process and results are clear, which can effectively avoid misoperation.

[0063] In a preferred embodiment, referring to Figure 2 、 Figures 4 to 7 , the control modes include the first mode, the second mode and the third mode, wherein:

[0064] In the first mode, when the key trigger information of the operation panel is obtained, the signal light group is controlled by the signal machine according to the corresponding relationship between the key types to execute the signal light off, signal light flashing yellow, signal light all red and mode switching operations respectively;

[0065] When the key trigger information of the operation panel is obtained in the second mode, the signal light group is controlled by the signal machine according to the corresponding relationship of the key type to perform signal stepping and mode switching operations;

[0066] When the key trigger information of the operation panel is obtained in the third mode, the signal guard and mode switching operations are performed by controlling the signal light group through the signal machine according to the corresponding relationship of the key type.

[0067] The working principle and beneficial effects of the above technical solution are as follows: When key trigger information is obtained from the operation panel in the first mode, the signal controller controls the signal light group to perform signal light off, signal light flashing yellow, signal light full red, and mode switching operations according to the corresponding relationship between key types. When the user presses the corresponding button, the button indicator light immediately lights up, and the signal controller immediately enters the corresponding control mode (transitioning from full red to full red based on the safety time) and maintains the corresponding state until the user presses the button again to end the corresponding function. In the second mode, when key trigger information is obtained from the operation panel, the signal controller controls the signal light group to perform signal stepping and mode switching operations according to the corresponding relationship between key types. When the user presses the "Manual Control" button, the signal controller immediately enters the "Manual Control" control mode according to the key priority trigger rules and remains in the current stage of the public green light state if the conditions for entering the "Manual Control" mode are met. To switch to the next stage, press the "Step" button. To exit the "Manual Control" mode, press the "Manual Control" button again. When the entry conditions are not met, such as in the yellow flashing state, the button indicator light will not light up. In the third mode, when a key trigger is received from the operation panel, the signal controller controls the signal light group to execute signal guard and mode switching operations based on the corresponding key type. In guard mode, the direction buttons on the signal controller's manual control panel are divided into two types: "single" and "double." Single buttons include four types: east, south, west, and north, while double buttons include two types: east, west, and north. To use the functions in guard mode, first press the "Guard" button. When the guard button indicator light comes on, guard mode is entered. Then, press the corresponding direction button. Once the direction button light comes on, the signal controller automatically executes the guard function and controls the corresponding signal light to maintain the corresponding release direction. To end the function, simply press the guard button again. When the guard button indicator goes off, the signal controller ends the guard function and returns to the timetable. When the signal controller is in guard mode and a direction button is already lit, pressing the current direction button again will extend the current hold time. If the user presses another direction button, the signal controller automatically controls the corresponding signal light to maintain the current direction. Through the above technical solutions, flexible switching between multiple control modes can be achieved, and simple manual control (stepping function) and complex manual control (guard function) can be realized, which meets complex signal requirements while effectively reducing the operating difficulty of staff.

[0068] In a preferred embodiment, referring to Figure 8 When the key trigger information of the operation panel is obtained in the third mode, the signal guard operation is performed by controlling the signal light group through the signal machine according to the corresponding relationship of the key type, including:

[0069] Determine the corresponding key type according to the key trigger information, and further determine whether the triggered key is a direction key;

[0070] If it is a direction button, scan the preset scheduling table, daily plan table or program table for controlling the switching of the traffic lights, and search whether it contains the traffic light phase structure corresponding to the direction button;

[0071] When the signal light phase structure corresponding to the direction button is retrieved, the guard function transition execution phase is entered, and after the guard function transition execution phase is completed, the phase is switched to the corresponding phase and execution begins.

[0072] The working principle and beneficial effects of the above technical solution are as follows: when executing a guard operation, the corresponding key type is determined based on the key trigger information, and further whether the triggered key is a directional key. If it is a directional key, the preset schedule, daily plan, or program table for controlling traffic light switching is scanned to determine whether it contains a traffic light phase structure corresponding to the directional key. When a traffic light phase structure corresponding to the directional key is found, the system enters the guard function transition execution phase, and after the guard function transition execution phase is completed, it switches to the corresponding phase and begins execution. The guard function transition execution phase is used to prevent traffic conflicts caused by jumpy switching of traffic light phase structures. By searching the phase structure, complex traffic light control methods can be integrated. The operator only needs to press the directional key corresponding to the operation purpose to switch control of multiple traffic lights, thereby effectively reducing the control difficulty of the signal controller. The system uses an automatic search algorithm to directly search and match the signal phases according to the switching function of the manual key, and jumps to switch when a match is found. This is simple and convenient to use, and does not require professional configuration.

[0073] In a preferred embodiment, the following rules are followed when searching the signal light phase structure:

[0074] If the direction button is an opposite direction button, then it is detected whether there is a signal light phase structure that includes both straight and right-turn traffic flows in the two directions passed;

[0075] If the direction button is a single direction button, it is detected whether there is a signal light phase structure including the vehicle flow direction corresponding to the single direction button.

[0076] The working principle and beneficial effects of the above technical solution are as follows: when searching the phase structure of the traffic light, if the direction button pressed is a double direction button, it is detected whether there is a traffic light phase structure that includes both the straight and right-turn vehicle flows in the two directions passed, for example: the "East-West" button only responds to phase structures that include 1AG / 2AG, 1SG / 2SG, 1AG / 2SG, 1SG / 2AG, and other flow combinations. The responded phase structure may also contain other flow directions that do not cause green conflicts. If the direction button pressed is a single direction button, it is detected whether there is a traffic light phase structure that includes the vehicle flow direction corresponding to the single button. For example, the motor vehicle flow directions that can be responded to by the "East" button include 1AG, 1LG, 1SG, and 1RG, and the search order of the single button is:

[0077] AG->LG+SG+RG->LG+SG->LG->SG->LG+RG->SG+RG->RG

[0078] There may also be other flow directions in the corresponding phase structure that do not cause green conflicts. The flow direction symbol table is as follows:

[0079] Flow direction symbol Flow direction description LG Turn left SG straight RG Turn right AG Left value right turn

[0080] The table of direction symbols is as follows:

[0081] Direction symbols direction 1 East direction 2 west direction 3 South direction 4 North direction

[0082] In a preferred embodiment, when a traffic light phase structure corresponding to the direction button is retrieved, and the traffic light phase structure corresponding to the direction button in the retrieved schedule, daily plan or plan table is sequentially overlapped with the currently running traffic light phase structure, after the current traffic light phase structure is executed, the guard function transition execution phase is skipped and the execution is directly switched to the corresponding phase to start execution.

[0083] The working principle and beneficial effects of the above technical solution are as follows: when a signal light phase structure corresponding to the direction key is retrieved, and the signal light phase structure corresponding to the direction key in the retrieved schedule, daily plan, or program table overlaps with the currently running signal light phase structure, after the current signal light phase structure is executed, the guard function transition execution stage is skipped and the execution is directly switched to the corresponding stage. For example, if the retrieved schedule, daily plan, or program table contains a loop structure of signal light phase structure 1-signal light phase structure 2-signal light phase structure 3-signal light phase structure 4-signal light phase structure 1, when the current signal light phase structure is 2 and the signal light phase structure corresponding to the direction key pressed by the operator is retrieved as signal light phase structure 3, it indicates that there is a sequence overlap. Therefore, after the current signal light phase structure 2 is executed, the guard function transition execution stage is skipped and the execution is directly switched to the corresponding stage, i.e., signal light phase structure 3, thereby avoiding redundant guard function transition execution stages.

[0084] In a preferred embodiment, when the operator performs manual control through the operation panel, the following operations are performed:

[0085] Obtaining a traffic flow image of the current intersection through a camera at the intersection, and performing recognition analysis on the traffic flow image to determine whether there are special vehicles in the traffic flow image;

[0086] When a special vehicle exists, the special vehicle is tracked and photographed to obtain multiple continuous images, and feature locking analysis is performed on the multiple continuous images to determine whether the special vehicle is performing a mission based on the status of the warning lights of the special vehicle;

[0087] When it is determined that the special vehicle is performing a task, the lane in which the special vehicle is located is determined and the traffic flow direction of the lane is analyzed;

[0088] According to the traffic flow direction of the lane where the special vehicle is located, determining whether the signal light phase structure manually switched by the operator conflicts with the traffic flow direction of the lane where the special vehicle is located;

[0089] If there is a conflict, the operator will be prompted through the operation panel to confirm and then switch.

[0090] The working principle and beneficial effects of the above technical solution are as follows: when the operator manually controls the system through the operation panel, the intersection camera captures traffic images of the current intersection, identifies and analyzes the traffic images to determine whether there are special vehicles in the traffic flow; if a special vehicle is present, the system tracks and captures multiple continuous images of the special vehicle, performs feature lock analysis on the multiple continuous images, and determines whether the special vehicle is currently performing a task based on the status of the special vehicle's warning lights; if the special vehicle is currently performing a task, the lane in which the special vehicle is located is determined and the traffic flow direction of the lane is analyzed; based on the traffic flow direction of the lane in which the special vehicle is located, it is determined whether the signal light phase structure manually switched by the operator conflicts with the traffic flow direction of the lane in which the special vehicle is located; if there is a conflict, the operator is prompted through the operation panel to confirm and then switch. This enables the identification of special vehicles and can prompt staff to manually release the lane in which the special vehicle is located, allowing the special vehicle to pass smoothly.

[0091] In a preferred embodiment, when the operator performs manual control through the operation panel, the following operations are also performed:

[0092] The camera at the intersection is used to obtain the traffic flow image of the current intersection, and the traffic flow image is identified and analyzed to determine the number of vehicles in each lane;

[0093] According to the number of vehicles on each lane, the outflow time required for all vehicles on the lane to exit the lane is predicted based on a preset vehicle number-outflow time prediction table;

[0094] Determine the shortest outflow time among multiple lanes as a time base, and based on the time base, determine a ratio of the outflow time corresponding to each lane to the time base, and use the ratio as the opening weight of the lane;

[0095] Provide signal light phase structure switching suggestions to operators based on the open weight of each lane.

[0096] The working principle and beneficial effects of the above technical solution are as follows: when the operator manually controls the intersection through the operation panel, the camera at the intersection obtains the traffic flow image of the current intersection, and the traffic flow image is identified and analyzed to determine the number of vehicles in each lane; based on the number of vehicles in each lane, the outflow time required for all vehicles in the lane to exit the lane is predicted based on the preset vehicle number-outflow time prediction table; the shortest outflow time among multiple lanes is determined as the time base, and based on the time base, the ratio of the outflow time corresponding to each lane to the time base is determined, and the ratio is used as the opening weight of the lane; based on the opening weight of each lane, the operator is provided with a signal light phase structure switching suggestion. Through the above technical solution, scientific signal light phase structure switching suggestions can be automatically provided to the operator based on the on-site traffic flow situation, allowing the operator to switch the signal light phase structure more conveniently.

[0097] In a preferred embodiment, providing a signal light phase structure switching suggestion to an operator based on the open weight of each lane includes:

[0098] Scan all signal light phase structures in the current schedule, daily plan or program table used to control signal light switching;

[0099] For each signal light phase structure, multiple lanes corresponding to the traffic flow under the signal light phase structure are determined, and the sum of the open weights corresponding to each lane is determined as the priority value of the signal light phase structure;

[0100] Determine the priority value of each signal light phase structure and recommend the operator to switch to the signal light phase structure with the largest priority value.

[0101] The working principle and beneficial effects of the above technical solution are as follows: When providing signal light phase structure switching recommendations to operators based on the open weight of each lane, the solution scans all signal light phase structures in the currently used schedule, daily plan, or plan table used to control signal light switching. For each signal light phase structure, the multiple lanes corresponding to the signal light phase structure are determined, and the sum of the open weights corresponding to each lane is determined as the priority value of the signal light phase structure. The priority value of each signal light phase structure is determined, and the operator is recommended to switch to the signal light phase structure with the highest priority value. This achieves scientific screening of signal light phase structures with high priority, improving operator work efficiency.

[0102] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A method for controlling manual signal phase switching of a traffic signal, characterized in that: include: Get the key trigger information of the operation panel and determine the corresponding key type; Analyze the preset key execution content corresponding to the key type based on the current control mode of the signal machine, and determine the execution result of the key execution content; Switching the phase of the signal according to the execution result and the current state of the signal; When the operator performs manual control through the operation panel, the following operations are performed: Obtaining a traffic flow image of the current intersection through a camera at the intersection, and performing recognition analysis on the traffic flow image to determine whether there are special vehicles in the traffic flow image; When a special vehicle exists, the special vehicle is tracked and photographed to obtain multiple continuous images, and feature locking analysis is performed on the multiple continuous images to determine whether the special vehicle is performing a mission based on the status of the warning lights of the special vehicle; When it is determined that the special vehicle is performing a task, the lane in which the special vehicle is located is determined and the traffic flow direction of the lane is analyzed; According to the traffic flow direction of the lane where the special vehicle is located, determining whether the signal light phase structure manually switched by the operator conflicts with the traffic flow direction of the lane where the special vehicle is located; If there is a conflict, the operator will be prompted through the operation panel to confirm and switch; When the operator performs manual control through the operation panel, the following operations are also performed: The camera at the intersection is used to obtain the traffic flow image of the current intersection, and the traffic flow image is identified and analyzed to determine the number of vehicles in each lane; According to the number of vehicles on each lane, the outflow time required for all vehicles on the lane to flow out of the lane is predicted based on a preset vehicle number-outflow time prediction table; Determine the shortest outflow time among multiple lanes as a time base, and based on the time base, determine a ratio of the outflow time corresponding to each lane to the time base, and use the ratio as the opening weight of the lane; Provide signal light phase structure switching suggestions to operators based on the open weight of each lane.

2. A method for controlling manual signal phase switching of traffic signal control according to claim 1, characterized in that: Priority is assigned to each button on the operation panel in advance, and button priority triggering rules are set.

3. The method for controlling manual signal phase switching of traffic signal control according to claim 1, characterized in that: The analysis of the preset key execution content corresponding to the key type based on the current control mode of the signal machine to determine the execution result of the key execution content includes: When the key execution content is control mode switching, it is determined based on the preset key priority triggering rules whether the switching from the current control mode to another control mode corresponding to the key type is allowed. If not allowed, a warning for manually exiting the current mode is issued. If allowed, it is further determined whether the switching work is an immediate switching. If so, the first type of execution result is determined. If not, the delay time required for automatically exiting the current mode is determined, and the second type of execution result is determined based on the delay time; When the key execution content is signal control switching under the same control mode, the preset third type of execution result corresponding to the control mode is determined.

4. A method for controlling manual signal phase switching of traffic signal control according to claim 3, characterized in that: The control modes include a first mode, a second mode and a third mode, wherein: In the first mode, when the key trigger information of the operation panel is obtained, the signal light group is controlled by the signal machine according to the corresponding relationship between the key types to execute the signal light off, signal light flashing yellow, signal light all red and mode switching operations respectively; When the key trigger information of the operation panel is obtained in the second mode, the signal light group is controlled by the signal machine according to the corresponding relationship of the key type to perform signal stepping and mode switching operations; When the key trigger information of the operation panel is obtained in the third mode, the signal guard and mode switching operations are performed by controlling the signal light group through the signal machine according to the corresponding relationship of the key type.

5. A method for controlling manual signal phase switching of traffic signal control according to claim 4, characterized in that: When the key trigger information of the operation panel is obtained in the third mode, the signal guard operation is performed by controlling the signal light group through the signal machine according to the corresponding relationship of the key types, including: Determine the corresponding key type according to the key trigger information, and further determine whether the triggered key is a direction key; If it is a direction button, scan the preset scheduling table, daily plan table or program table for controlling the switching of the traffic lights, and search whether it contains the traffic light phase structure corresponding to the direction button; When the signal light phase structure corresponding to the direction button is retrieved, the guard function transition execution phase is entered, and after the guard function transition execution phase is completed, the phase is switched to the corresponding phase and execution begins.

6. A method for controlling manual signal phase switching of traffic signal control according to claim 5, characterized in that: The following rules are followed when searching for a signal light phase structure: If the direction button is an opposite direction button, then it is detected whether there is a signal light phase structure that includes both straight and right-turn traffic flows in the two directions passed; If the direction button is a single direction button, it is detected whether there is a signal light phase structure including the vehicle flow direction corresponding to the single direction button.

7. The method for controlling manual signal phase switching of traffic signal control according to claim 5, characterized in that: When a traffic light phase structure corresponding to the direction button is retrieved, and the traffic light phase structure corresponding to the direction button in the retrieved schedule, daily plan or plan table is sequentially overlapped with the currently running traffic light phase structure, after the current traffic light phase structure is executed, the guard function transition execution phase is skipped and the execution is directly switched to the corresponding phase to start.

8. The method for controlling manual signal phase switching of traffic signal control according to claim 1, characterized in that: The signal light phase structure switching suggestion provided to the operator based on the open weight of each lane includes: Scan all signal light phase structures in the current schedule, daily plan or program table used to control signal light switching; For each signal light phase structure, multiple lanes corresponding to the traffic flow under the signal light phase structure are determined, and the sum of the open weights corresponding to each lane is determined as the priority value of the signal light phase structure; Determine the priority value of each signal light phase structure and recommend the operator to switch to the signal light phase structure with the largest priority value.

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