CN113734240B - Control method and control system of speed limit board - Google Patents
Control method and control system of speed limit board Download PDFInfo
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- CN113734240B CN113734240B CN202111073187.4A CN202111073187A CN113734240B CN 113734240 B CN113734240 B CN 113734240B CN 202111073187 A CN202111073187 A CN 202111073187A CN 113734240 B CN113734240 B CN 113734240B
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Abstract
The invention provides a control method of a speed limit board, which comprises the following steps: the speed limit display detection module acquires current first actual display speed information; the first actual display speed information includes first frame encoding information; the vehicle passing detection module detects a vehicle passing event, and when the vehicle passing event exists, vehicle passing event information corresponding to the vehicle passing event is sent to the control module; the control module determines a speed limit value according to vehicle passing event information in the vehicle passing event and preset construction plan mode information, inquires preset frame coding information corresponding to the speed limit value according to the speed limit value, and generates first direction control information according to the preset frame coding information and the first frame coding information; the first direction control information includes a first type and a second type; the first type and the second type are used to distinguish a moving direction of a curtain in a display system.
Description
Technical Field
The invention relates to the technical field of control, in particular to a control method and a control system of a speed-limiting board.
Background
When the railway business line is in construction operation, a movable speed-reducing signal board, hereinafter referred to as a speed-limiting board, is needed, and the speed-limiting board is replaced for many times in the construction process and in a period of time after the construction process according to relevant rules. The existing speed-limiting board has the following problems in the using process:
(1) The speed limit board is replaced manually, which wastes time and labor, is inconvenient to use and has low efficiency. At present, a speed-limiting plate with a fixed speed-limiting value is used in a construction operation field, a plurality of signal plates with different speed-limiting values need to be prepared, the passing condition of a line train needs to be monitored manually according to different construction operation items, construction conditions, operation modes and train releasing conditions, and different speed-limiting plates are replaced for a plurality of times according to rules or scheduling commands when the speed-limiting plate reaches a specified place within a specified time;
(2) If the speed limit board inclines or falls down when no one is in duty, the speed limit board cannot be found and corrected in time, and hidden danger can be caused to driving safety.
Therefore, a method and a system for controlling the speed-limiting sign are urgently needed to control the speed-limiting sign, so that the speed-limiting sign can automatically update the speed-limiting content, and the speed-limiting content is updated according to the vehicle passing conditions during construction.
Disclosure of Invention
The invention aims to provide a control method and a control system of a speed-limiting card aiming at the defects of the prior art, and aims to solve the problem that the display content of the speed-limiting card cannot be automatically updated in the prior art.
In a first aspect, the invention provides a control method of a speed-limiting card, which is applied to a control system of the speed-limiting card, wherein the control system comprises a speed-limiting display detection module, a process detection module and a control module, and the method comprises the following steps:
the speed limit display detection module acquires current first actual display speed information; the first actual display speed information includes first frame encoding information;
the vehicle passing detection module detects a vehicle passing event, and when the vehicle passing event exists, vehicle passing event information corresponding to the vehicle passing event is sent to the control module;
the control module determines a speed limit value according to vehicle passing event information in the vehicle passing event and preset construction plan mode information, obtains preset frame coding information corresponding to the speed limit value according to the speed limit value query, and generates first direction control information according to the preset frame coding information and the first frame coding information; the first direction control information comprises a first type and a second type; the first type and the second type are used for distinguishing the moving direction of a curtain in the display system.
In one possible implementation, the method further includes:
the speed limit display detection module acquires real-time second actual display speed information when the curtain is rolled; the second actual display speed information includes second frame encoding information;
the control module judges whether the second frame coding information is consistent with the preset frame coding information or not, generates rotation stop control information when the second frame coding information is consistent with the preset frame coding information, and sends the rotation stop control information to a motor of the display system so as to stop the motor from rotating.
In one possible implementation, the control system further includes a fail-safe device, which is specifically a clutch, and the method further includes:
when the first direction control information is of a first type or a second type, the clutch is closed;
and when the second frame coding information is inconsistent with the preset frame coding information, the clutch is disconnected.
In a possible implementation manner, the control module comprises a memory, the memory stores construction plan mode information, the construction plan mode information comprises a release mode, the release mode comprises a plurality of steps, each step has a corresponding speed limit value and a corresponding duration, and whether manual confirmation is needed when entering the next step or not and whether a vehicle passing event is needed when entering the next step or not are achieved; the vehicle passing detection module comprises an acceleration sensor, an image sensor and a radar speed measurement/distance measurement sensor; the method further comprises the following steps:
the acceleration sensor detects three-dimensional acceleration information of the speed limit board and sends the acquired three-dimensional acceleration information to the control module;
the control module judges whether to start the image sensor and the radar speed/distance measuring sensor according to the three-dimensional acceleration information, generates first starting information and second starting information when the image sensor and the radar speed/distance measuring sensor are started, sends the first starting information to the image sensor, and sends the second starting information to the radar speed/distance measuring sensor;
the image sensor is started according to the first starting information, and image information of the train in the passing process is obtained after the image sensor is started; the image information comprises first time information;
the laser radar speed/distance measurement sensor is started according to the second starting information, and speed information and distance information of the train during passing are obtained after the laser radar speed/distance measurement sensor is started; the speed information and the distance information comprise second time information;
the control module carries out fusion processing on the image information, the speed information and the distance information according to the first time information and the second time information to obtain fusion data, determines the passing position and the passing actual time according to the fusion data, compares the passing position with the position information of the speed limit board, compares the passing actual time with the steps when the passing position is consistent with the position information, determines a target step corresponding to the passing actual time and a passing count value of a passing event in the target step, and determines a speed limit value according to the count value.
In one possible implementation, the control system further includes: a position attitude detection module; the position and posture detection module comprises a positioning module and a posture detection module; the method further comprises the following steps:
the positioning module acquires the position information of the speed limit board and sends the position information to the control module;
the control module compares the position information with initial position information, generates position movement alarm information when the deviation of the position information and the initial position information exceeds a preset threshold value, and sends the position movement alarm information;
the attitude detection module acquires the orientation angle information of the speed limit board and sends the orientation angle information to the control module;
the control module compares the orientation angle information with preset orientation angle information, generates angle abnormity alarm information when the angle difference value between the orientation angle information and the preset orientation angle information exceeds a preset difference value threshold value, and sends the angle abnormity alarm information.
In a second aspect, the present invention provides a control system for a speed-limit sign, including: the system comprises a vehicle passing detection module, a control module and a speed limit display detection module;
the speed limit display detection module is used for acquiring current first actual display speed information; the first actual display speed information includes first frame encoding information;
the vehicle passing detection module is used for detecting a vehicle passing event and sending vehicle passing event information corresponding to the vehicle passing event to the control module when the vehicle passing event exists;
the control module is used for determining a speed limit value according to vehicle passing event information in the vehicle passing event and preset construction plan mode information, inquiring to obtain preset frame coding information corresponding to the speed limit value according to the speed limit value, and generating first direction control information according to the preset frame coding information and the first frame coding information; the first direction control information comprises a first type and a second type; the first type and the second type are used for distinguishing the moving direction of a curtain in the display system.
In one possible implementation, the control system further comprises a fail-safe device; the fail-safe device is specifically a clutch;
when the first direction control information is of a first type or a second type, the clutch is closed;
and when the second frame coding information is inconsistent with the preset frame coding information, the clutch is disconnected.
In one possible implementation, the control module includes a memory, the memory storing construction plan mode information; the construction plan mode information comprises a release mode, the release mode comprises a plurality of steps, each step has a corresponding speed limit value and a corresponding duration, whether manual confirmation is needed when entering the next step, and whether a vehicle passing event is needed when entering the next step;
the vehicle passing detection module comprises an acceleration sensor, an image sensor and a radar speed measurement/distance measurement sensor, wherein the acceleration sensor is used for detecting the three-dimensional acceleration information of the speed limit board and sending the obtained three-dimensional acceleration information to the control module;
the control module judges whether to start the image sensor and the radar speed/distance measuring sensor according to the three-dimensional acceleration information, generates first starting information and second starting information when the image sensor and the radar speed/distance measuring sensor are started, sends the first starting information to the image sensor, and sends the second starting information to the radar speed/distance measuring sensor;
the image sensor is started according to the first starting information, and image information of the train in the passing process is obtained after the image sensor is started; the image information comprises first time information;
the laser radar speed/distance measuring sensor is started according to the second starting information, and speed information and distance information of the train in the passing process are obtained after the laser radar speed/distance measuring sensor is started; the speed information and the distance information include second time information;
the control module performs fusion processing on the image information, the speed information and the distance information according to the first time information and the second time information to obtain fusion data, determines the position of the passing vehicle and the actual time of the passing vehicle according to the fusion data, compares the position of the passing vehicle with the position information of the speed limit board, compares the actual time of the passing vehicle with the multiple steps when the position of the passing vehicle is consistent with the position information, determines a target step corresponding to the actual time of the passing vehicle and a vehicle passing count value of the vehicle passing event in the target step, and determines the speed limit value according to the count value.
In one possible implementation, the control system further includes: the device comprises a position and posture detection module, a position and posture detection module and a posture detection module, wherein the position and posture detection module comprises a positioning module and a posture detection module;
the positioning module is used for acquiring the position information of the speed limit board and sending the position information to the control module;
the control module is used for comparing the position information with initial position information, generating position movement alarm information when the deviation between the position information and the initial position information exceeds a preset threshold value, and sending the position movement alarm information;
the attitude detection module is used for acquiring the orientation angle information of the speed limit board and sending the orientation angle information to the control module;
and the control module is used for comparing the orientation angle information with preset orientation angle information, generating angle abnormal alarm information when the angle difference value between the orientation angle information and the preset orientation angle information exceeds a preset difference value threshold value, and sending the angle abnormal alarm information.
In a possible implementation manner, the positioning module is specifically a GPS or beidou receiving module; the attitude detection module is specifically a three-dimensional angle sensor.
By applying the control method and the system of the speed-limiting plate, the vehicle passing event can be detected, the display content of the speed-limiting plate can be automatically updated according to the vehicle passing event, and the rotation is stopped when the second frame of coded information is consistent with the preset frame of coded information, so that the waste of human resources caused by manual replacement of the speed-limiting plate is avoided. Furthermore, the falling and falling of the speed limit board can be detected, and the abnormal information is informed when the speed limit board is abnormal, so that the safety problem caused by the falling and falling is solved.
Drawings
FIG. 1 is a flow chart of a method for controlling a speed-limiting sign according to an embodiment of the present invention;
FIG. 2 is a second schematic flow chart of a method for controlling a speed-limiting sign according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a control system of a speed limit board according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a display system and a control system of a speed limit sign provided by an embodiment of the invention;
FIG. 5 is one of the schematic diagrams of the display system of FIG. 4;
fig. 6 is a second schematic diagram of the display system of fig. 4.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be further noted that, for the convenience of description, only the portions related to the related invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Fig. 1 is a schematic flow chart of a control method of a speed-limiting sign according to an embodiment of the present invention, and as shown in fig. 1, the present application includes the following steps:
Therefore, the speed limit board control method can automatically control the speed limit value of the speed limit board according to the frame coding information.
Further, the control method of the speed limit board may also perform feedback control, and in an optional implementation scheme, with reference to fig. 1, as shown in fig. 2, the control method of the present application further includes:
And 150, the control module judges whether the second frame coding information is consistent with the preset frame coding information, generates rotation stop control information when the second frame coding information is consistent with the preset frame coding information, and sends the rotation stop control information to a motor of the display system so as to stop the motor from rotating.
Therefore, by applying the control method and the system of the speed-limiting plate provided by the invention, the vehicle passing event can be detected, the display content of the speed-limiting plate can be automatically updated according to the vehicle passing event, and the rotation is stopped when the second frame of coded information is consistent with the preset frame of coded information, so that the waste of human resources caused by manual replacement of the speed-limiting plate is avoided. Furthermore, the falling and falling of the speed limit board can be detected, and the abnormal information is informed when the speed limit board is abnormal, so that the safety problem caused by the falling and falling is solved.
The present application will be described in more detail below with reference to the configuration of the control system of the speed limit sign. Referring to fig. 3 to 6, the control system 1 includes a passing detection module 11, a control module 12, and a speed limit display detection module 13. The display system 2 includes a first roller 21, a motor 22, a curtain 23, a second roller 24, and an energy storage spring 25. The control system and the control method of the present application will now be described in detail.
The speed limit display detection module 13 acquires current first actual display speed information; the first actual display speed information includes first frame encoding information;
specifically, referring to fig. 6, the curtain 23 has been segmented in advance, the front side of each segment has a speed limit value, the back side of each segment has a frame code message, each frame code message corresponds to a speed limit value one by one, and the correspondence between the frame code message and the speed limit value can be stored in the memory of the control module 12 in advance. The frame coding information may be a two-dimensional code, a barcode, or a custom graphic code, which is not limited in this application. The speed limit display detection module 13 may be specifically a photoelectric sensor, so as to detect the frame coding information on the curtain 23 and determine the corresponding speed limit value according to the frame coding information.
In one example, the speed limit may include 11 kinds of speed limits including a blank as shown in fig. 6.
The front side of the speed limit board conforms to the railway specification: i.e. circular, with an outer diameter d1=400mm, the pattern is shown with the circular rings and the numerical outline dimensions specified by the specification, the window dimensions 260 × 260mm, accommodating the numerical outer contour; the surface reflecting material is in accordance with the regulations of national standard road traffic sign reflecting film (GB/T18833), and the coefficient of retroreflection is above grade II. The periphery of the window on the front side of the speed-limiting board and the curtain 23 are made of the same reflective material.
The front surface of the curtain 23 is printed with speed limit values, and each speed limit value display area is a rectangle and is called a frame. When one frame of the curtain 23 is aligned to the front window of the speed-limiting board through the rotation of the first reel 21 or the rotation of the second reel 24, the front of the speed-limiting board externally displays corresponding speed-limiting value figures, and therefore variable speed-limiting value display is achieved. In the normal operation mode, the motor 22 can drive the first scroll 21 to rotate in two directions, thereby determining whether the curtain 23 is rolled up or down; the second roller 24 provides a torque to pull the curtain 23 downward when the motor is rotated upward to tension the curtain 23, and rolls the curtain 23 downward when the motor is rotated downward.
The vehicle passing detection module 11 detects a vehicle passing event, and when the vehicle passing event exists, sends vehicle passing event information corresponding to the vehicle passing event to the control module 12. A passing event is a train passing event. The train passing event information comprises train images, passing speed information and distance information corresponding to the train passing event, wherein the distance information can be the distance from the speed limit board.
When the speed limit board is applied to a railway or a highway, the vehicle passing event can be detected through the vehicle passing detection module 11.
In one example, the passing detection module 11 determines whether there is a train passing through the current route by using monitoring data provided by more than one sensor, including but not limited to: acceleration sensor, image sensor and radar speed/range sensor.
The acceleration sensor detects the vibration of the speed limit board caused by the running of the adjacent train, and the vibration is represented as the change of the three-dimensional acceleration of the speed limit board. The acceleration sensor provides a preliminary judgment basis and the starting time of other sensors. Specifically, the acceleration sensor is used for detecting three-dimensional acceleration information of the speed limit board and sending the obtained three-dimensional acceleration information to the control module. The control module 12 judges whether to start the image sensor and the radar speed/distance measuring sensor according to the three-dimensional acceleration information, determines to start the image sensor and the radar speed/distance measuring sensor when the numerical value of the three-dimensional acceleration information exceeds a preset three-dimensional acceleration threshold value, generates first start information and second start information, sends the first start information to the image sensor, and sends a second start new message to the radar speed/distance measuring sensor.
The image sensor is started according to the first starting information, and image information of the train in the passing process is obtained after the image sensor is started; the image information comprises the front direction of the speed limit board acquired at the first time, the image of the line and the image of the line passing through the train, and whether an oncoming train appears can be judged subsequently by utilizing a target recognition algorithm.
The radar speed measurement/distance measurement sensor is started according to the second starting information, and speed information and distance information of the train in the passing process are obtained after the radar speed measurement/distance measurement sensor is started; the speed information and the distance information include second time information.
The control module 12 performs fusion processing on the image information, the speed information and the distance information according to the first time information and the second time information to obtain fusion data, determines a passing event of the train on the line according to the fusion data, eliminates interference of the train on the line and other targets, determines the position of the passing train and the actual time of the passing train after determining the process event of the train on the line, compares the position of the passing train with the position information of the speed limit board, compares the actual time of the passing train with a plurality of steps when the position of the passing train is consistent with the position information, determines a target step corresponding to the actual time of the passing train and a passing count value of the passing event in the target step, and determines the speed limit value according to the count value.
Specifically, the control module 12 may obtain the speed limit value according to a plurality of ways, and the following describes how the control module 12 obtains the speed limit value in detail. There may be three ways:
first, the control module 12 receives the speed limit value when the speed select button on the speed limit sign is pressed.
Specifically, a speed limit board is provided with a speed selection button, the speed selection button can increase or decrease the speed on the basis of the current display speed information, and an increasing and decreasing rule is preset, namely, each time the speed limit board is pressed, the increase or decrease of the display speed information is fixedly increased or decreased according to the rule. Thus, when the vehicle speed selection button is pressed, the control module 12 may receive corresponding first speed limit information, including increasing/decreasing speed, and the number of presses, to determine the speed limit value based on the actual speed information.
The second, control system 1 comprises a first communication module 14; the first communication module is in communication connection with the management server, and the management server is in communication with the first terminal and the second terminal; the first terminal is a PC terminal, and the second terminal is a handheld terminal.
The first communication module 14 may be any one of a 4G communication module, a 5G communication module, and a WIFI module.
Thirdly, the control system 1 further comprises a second communication module 15; the second communication module 15 communicates with the second terminal.
Wherein, the second communication module 15 may be a bluetooth module. The speed limit board exchanges data directly with the second terminal without accessing a remote server.
For the second and third types, taking a railway as an example, according to the safety rules of railway work, the construction plan mode information can be preset according to different construction types, and the construction plan mode information can be divided according to the construction types, for example, the construction plan mode information includes a blocking mode and a release mode, and the blocking mode is a mode for forbidding passage, for example, the blocking mode can be enabled when in maintenance. The release mode is a special mode allowing passage, for example, after the maintenance is finished, the speed limit of the vehicle when the passage is allowed can be gradually changed along with the time.
The memory can store various construction plan mode information, and one construction plan mode information is various standard speed limit plans specified by the specification. The plans are called built-in, which means that they cannot be lost along with power failure, and after the speed limit board is powered on and started each time, the controller can directly read the plans without resending the plan contents from the terminal. Only their numbers need to be selected to allow the control module to directly execute a standard speed limit plan.
Meanwhile, the memory can also store user-defined construction plan mode information. The user can make a non-standard speed limit plan according to the requirement. The details of these plans need to be sent from the terminal to the control module before their execution. The control module 12 utilizes internal memory for storage and automatically executes the stored speed limit plan after startup.
In the following, the release mode is taken as an example, and how to obtain the speed limit value in the release mode is specifically described.
Referring to table 1, the release mode includes a plurality of steps, each having a corresponding speed limit value, a corresponding duration, whether manual confirmation is required to enter the next step, and whether a vehicle passing event is required to enter the next step. For example, the target step is 1, the passing count value is 1, that is, it means that the train is the first train passing in step 1, the speed limit value can be determined to be 35 through table 1, and when the train is the second train passing in step 2, the speed limit value can be determined according to the speed limit increment rule. Wherein, the counting value refers to the number of passing vehicles of which the current passing event is the target step. For example, the currently displayed speed information is the speed information to be displayed by the speed limit sign obtained by calculation. The speed limit increasing rule is a rule for increasing the speed limit value according to the count value, and can be set according to an empirical value, and the specific numerical value is not limited in the application.
As shown in table 1, table 1 shows the speed limit values in the release mode.
TABLE 1
The control module 12 is configured to determine a speed limit value according to vehicle passing event information in the vehicle passing event and preset construction plan mode information, query the speed limit value to obtain preset frame coding information corresponding to the speed limit value, and generate first direction control information according to the preset frame coding information and the first frame coding information; the first direction control information includes a first type and a second type;
when the first direction control information is of a first type, the motor 22 drives the first scroll 21 to scroll, the first scroll 21 drives the curtain 23 to scroll in the first direction, and when the first direction control information is of a second type, the first scroll 21 drives the curtain 23 to scroll in the second direction; the first type and the second type in the first direction control information may be specific to a rotation direction of the motor 22, for example, the motor rotates upwards to be the first type, and the motor rotates downwards to be the second type, so that the motor 22 is controlled by the control module 12, and the motor 22 drives the first scroll 21 to scroll upwards or downwards.
The speed limit display detection module 13 is further configured to obtain real-time second actual display speed information when the curtain 23 is scrolled; the second actual display speed information includes second frame encoding information;
the control module 12 is further configured to determine whether the second frame coding information is consistent with the preset frame coding information, and when the second frame coding information is consistent with the preset frame coding information, generate rotation stop control information and send the rotation stop control information to the motor 22; the motor 22 stops rotating according to the rotation stop control.
Further, the control module 12 may perform feedback control, and specifically, the control system further includes a fail-safe device 17; the fail-safe means 17 is embodied as a clutch; and when the second frame coding information is inconsistent with the preset frame coding information, starting the failure safety module 17 to ensure safety.
Specifically, in a normal working mode, namely when the first direction control information is of a first type or a second type, the clutch is closed; after the clutch is closed, the motor 22 drives the first scroll 21 to roll; the energy storage spring 25 is acted by the action force generated when the first scroll 21 rolls, and the energy storage spring 25 is compressed to store energy; the first direction is upward.
And when the second frame coding information is inconsistent with the preset frame coding information and is in an abnormal working mode, the clutch is disconnected at the moment. After the clutch is disconnected, the first reel 21 is disconnected from the control of the motor 22, the energy storage spring 25 releases the stored energy to drive the curtain 23 to move towards the second direction until the frame coding information corresponding to the fault speed limit value is moved. This means that the screen 23 cannot be scrolled to the position corresponding to the preset frame code information due to a failure of the motor 22 driving, the speed limit display detection module, or other mechanical parts. The presence of such a fault results in the scheduled speed limit plan not being completed and there is a risk of an uncontrolled acceleration display. The fault limit value here may be 0.
Besides the reason that the coded information of the two frames is inconsistent, the clutch can be disconnected, and the following reasons can be also provided:
(1) The control module 12 detects the voltage and current abnormality of the control circuit built in the control module in real time, the temperature sensor detects temperature data, and the control module 12 judges whether the temperature abnormality exists.
Specifically, the speed limit board is further provided with a temperature sensor which can acquire temperature data in real time, after the control module 12 acquires the temperature data, the temperature data and a preset temperature threshold value are judged, when the temperature data exceeds the preset temperature threshold value, abnormal temperature is judged, when the temperature is abnormal, the control module 12 generates abnormal temperature information, clutch disconnection control information is generated through the abnormal temperature information, the clutch disconnection control information is disconnected through the clutch, after the clutch is disconnected, the first winding shaft 21 is disconnected from the motor 22, the energy storage spring 25 releases stored energy, and the curtain 23 is driven to move towards the second direction until the frame coding information corresponding to the fault speed limit value is moved. Meanwhile, the abnormal information of the voltage and the current of the control circuit of the control module can be obtained, and the control module 12 controls the clutch to be disconnected when the abnormal information is generated.
(2) The control module 12 finds program running abnormality and data abnormality, and has a risk of logic disorder to cause speed-up display.
Specifically, the control module 12 may determine whether there is a program running abnormality through its running monitoring hardware-watchdog, and perform abnormality determination on the acquired data, such as determining whether there is a jump in the data, whether there is a breakpoint, and when there is an abnormality, control the clutch to be disconnected, and execute subsequent operations after the clutch is disconnected.
(3) The control system 1 finds itself with an anomaly in position or attitude (by means of the position and attitude detection module) with the risk of causing a false indication of the speed of operation of the adjacent line.
Specifically, in (3), in order to detect an abnormality of the speed limit sign, the abnormality is quickly found. The control system 1 may further include: a position and orientation detection module 16, wherein the position and orientation detection module 16 comprises a positioning module and an orientation detection module.
The positioning module acquires the position information of the speed limit board and sends the position information to the control module 12; the control module 12 compares the position information with the initial position information, generates position movement alarm information when the deviation between the position information and the initial position information exceeds a preset threshold value, and sends the position movement alarm information; the attitude detection module is used for acquiring the orientation angle information of the speed limit board and sending the orientation angle information to the control module; and the control module 12 is configured to compare the orientation angle information with preset orientation angle information, generate angle abnormality alarm information when an angle difference between the orientation angle information and the preset orientation angle information exceeds a preset difference threshold, and send the angle abnormality alarm information.
The positioning module is specifically a GPS or Beidou receiving module; the attitude detection module is specifically a three-dimensional angle sensor. The initial position information may be geographic position data read by the positioning module when the positioning module is initially started after being installed, or may be geographic position data written by the first terminal or the second terminal, which is not limited in this application. The preset orientation angle information may be the orientation angle information read when the gesture detection module is initially started after being installed, or the orientation angle information written by the first terminal, the second terminal, or the management server, which is not limited in this application.
It can be understood that, after the control module 12 generates the position movement alarm information and the angle abnormality alarm information, the clutch may be controlled to be disconnected, the first winding shaft 21 is disconnected from the control of the motor 22, and the energy storage spring 25 releases the stored energy to drive the curtain 23 to move toward the second direction until the frame coding information corresponding to the fault speed limit value is moved. The fault speed limit value can be 0, namely blank, and the speed limit value at the moment is displayed as 0 and is an emergency warning content.
Meanwhile, the position movement alarm information and the angle abnormity alarm information can be sent to one or more of a management server, a PC terminal and a handheld terminal, so that alarm is realized.
By applying the control method and the control system of the speed limit board provided by the embodiment of the invention, the speed limit board can be controlled to automatically replace the speed limit value, the labor cost is saved and the construction efficiency is improved.
Those of skill would further appreciate that the various illustrative components and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the technical solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied as hardware, a software module executed by a terminal, or a combination of the two. A software module may reside in Random Access Memory (RAM), memory, read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The above embodiments are provided to further explain the objects, technical solutions and advantages of the present invention in detail, it should be understood that the above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the scope of the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A control method of a speed limit board is characterized in that the control method of the speed limit board is applied to a control system of the speed limit board, the control system comprises a speed limit display detection module, a vehicle passing detection module and a control module, and the method comprises the following steps:
the speed limit display detection module acquires current first actual display speed information; the first actual display speed information includes first frame encoding information;
the vehicle passing detection module detects a vehicle passing event, and when the vehicle passing event exists, the vehicle passing detection module sends vehicle passing event information corresponding to the vehicle passing event to the control module;
the control module determines a speed limit value according to vehicle passing event information in the vehicle passing event and preset construction plan mode information, inquires preset frame coding information corresponding to the speed limit value according to the speed limit value, and generates first direction control information according to the preset frame coding information and the first frame coding information; the first direction control information comprises a first type and a second type; the first type and the second type are used for distinguishing the moving direction of a curtain in a display system;
the control module comprises a memory, construction plan mode information is stored in the memory, the construction plan mode information comprises a release mode, the release mode comprises a plurality of steps, each step has a corresponding speed limit value and a corresponding duration, whether manual confirmation is needed when the next step is carried out, and whether a vehicle passing event is needed when the next step is carried out; the vehicle passing detection module comprises an acceleration sensor, an image sensor and a radar speed/distance measurement sensor; the method further comprises the following steps:
the acceleration sensor detects three-dimensional acceleration information of the speed limit board during vibration and sends the obtained three-dimensional acceleration information to the control module;
the control module judges whether to start the image sensor and the radar speed/distance measuring sensor according to the three-dimensional acceleration information, generates first starting information and second starting information when the image sensor and the radar speed/distance measuring sensor are started, sends the first starting information to the image sensor, and sends the second starting information to the radar speed/distance measuring sensor;
the image sensor is started according to the first starting information, and image information of the train in the passing process is obtained after the image sensor is started; the image information comprises first time information;
the radar speed measurement/distance measurement sensor is started according to the second starting information, and speed information and distance information of the train in the passing process are obtained after the radar speed measurement/distance measurement sensor is started; the speed information and the distance information include second time information;
the control module performs fusion processing on the image information, the speed information and the distance information according to the first time information and the second time information to obtain fusion data, determines the position of the passing vehicle and the actual time of the passing vehicle according to the fusion data, compares the position of the passing vehicle with the position information of the speed limit board, compares the actual time of the passing vehicle with the multiple steps when the position of the passing vehicle is consistent with the position information, determines a target step corresponding to the actual time of the passing vehicle and a vehicle passing count value of the vehicle passing event in the target step, and determines the speed limit value according to the count value.
2. The method of claim 1, further comprising:
the speed limit display detection module acquires real-time second actual display speed information when the curtain is rolled; the second actual display speed information includes second frame encoding information;
the control module judges whether the second frame coding information is consistent with the preset frame coding information or not, generates rotation stop control information when the second frame coding information is consistent with the preset frame coding information, and sends the rotation stop control information to a motor of the display system so as to stop the motor from rotating.
3. The method of claim 1, wherein the control system further comprises a fail-safe device, in particular a clutch, the method further comprising:
when the first direction control information is of a first type or a second type, the clutch is closed;
and when the second frame coding information is inconsistent with the preset frame coding information, the clutch is disconnected.
4. The method of claim 1, wherein the control system further comprises: a position and posture detection module; the position and posture detection module comprises a positioning module and a posture detection module; the method further comprises the following steps:
the positioning module acquires the position information of the speed limit board and sends the position information to the control module;
the control module compares the position information with initial position information, generates position movement alarm information when the deviation of the position information and the initial position information exceeds a preset threshold value, and sends the position movement alarm information;
the attitude detection module acquires the orientation angle information of the speed limit board and sends the orientation angle information to the control module;
the control module compares the orientation angle information with preset orientation angle information, generates angle abnormity alarm information when the angle difference value between the orientation angle information and the preset orientation angle information exceeds a preset difference value threshold value, and sends the angle abnormity alarm information.
5. A control system of a speed limit board is characterized in that the control system of the speed limit board comprises: the system comprises a vehicle passing detection module, a control module and a speed limit display detection module;
the speed limit display detection module is used for acquiring current first actual display speed information; the first actual display speed information includes first frame encoding information;
the vehicle passing detection module is used for detecting a vehicle passing event and sending vehicle passing event information corresponding to the vehicle passing event to the control module when the vehicle passing event exists;
the control module is used for determining a speed limit value according to vehicle passing event information in the vehicle passing event and preset construction plan mode information, inquiring to obtain preset frame coding information corresponding to the speed limit value according to the speed limit value, and generating first direction control information according to the preset frame coding information and the first frame coding information; the first direction control information comprises a first type and a second type; the first type and the second type are used for distinguishing the moving direction of a curtain in the display system;
the control module comprises a memory, and the memory stores construction plan mode information; the construction plan mode information comprises a release mode, the release mode comprises a plurality of steps, each step has a corresponding speed limit value and a corresponding duration, whether manual confirmation is needed when entering the next step, and whether a vehicle passing event is needed when entering the next step;
the vehicle passing detection module comprises an acceleration sensor, an image sensor and a radar speed measurement/distance measurement sensor, wherein the acceleration sensor is used for detecting three-dimensional acceleration information of the speed limit board during vibration and sending the obtained three-dimensional acceleration information to the control module;
the control module judges whether to start the image sensor and the radar speed/distance measuring sensor according to the three-dimensional acceleration information, generates first starting information and second starting information when the image sensor and the radar speed/distance measuring sensor are started, sends the first starting information to the image sensor, and sends the second starting information to the radar speed/distance measuring sensor;
the image sensor is started according to the first starting information, and image information of the train in the passing process is obtained after the image sensor is started; the image information comprises first time information;
the radar speed measurement/distance measurement sensor is started according to the second starting information, and speed information and distance information of the train in the passing process are obtained after the radar speed measurement/distance measurement sensor is started; the speed information and the distance information comprise second time information;
the control module performs fusion processing on the image information, the speed information and the distance information according to the first time information and the second time information to obtain fusion data, determines the position of the passing vehicle and the actual time of the passing vehicle according to the fusion data, compares the position of the passing vehicle with the position information of the speed limit board, compares the actual time of the passing vehicle with the multiple steps when the position of the passing vehicle is consistent with the position information, determines a target step corresponding to the actual time of the passing vehicle and a vehicle passing count value of the vehicle passing event in the target step, and determines the speed limit value according to the count value.
6. The control system of claim 5, further comprising a fail-safe device; the fail-safe device is specifically a clutch;
when the first direction control information is of a first type or a second type, the clutch is closed;
and when the second frame coding information is inconsistent with the preset frame coding information, the clutch is disconnected.
7. The control system of claim 5, further comprising: the device comprises a position and posture detection module, a position and posture detection module and a posture detection module, wherein the position and posture detection module comprises a positioning module and a posture detection module;
the positioning module is used for acquiring the position information of the speed limit board and sending the position information to the control module;
the control module is used for comparing the position information with initial position information, generating position movement alarm information when the deviation between the position information and the initial position information exceeds a preset threshold value, and sending the position movement alarm information;
the attitude detection module is used for acquiring the orientation angle information of the speed limit board and sending the orientation angle information to the control module;
and the control module is used for comparing the orientation angle information with preset orientation angle information, generating angle abnormal alarm information when the angle difference value between the orientation angle information and the preset orientation angle information exceeds a preset difference value threshold value, and sending the angle abnormal alarm information.
8. The control system of claim 7, wherein the positioning module is specifically a GPS or beidou receiving module; the attitude detection module is specifically a three-dimensional angle sensor.
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