CN110060495A - Traffic signal light condition monitors system and method - Google Patents
Traffic signal light condition monitors system and method Download PDFInfo
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- CN110060495A CN110060495A CN201910444733.7A CN201910444733A CN110060495A CN 110060495 A CN110060495 A CN 110060495A CN 201910444733 A CN201910444733 A CN 201910444733A CN 110060495 A CN110060495 A CN 110060495A
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000004891 communication Methods 0.000 claims abstract description 70
- 238000009434 installation Methods 0.000 claims abstract description 59
- 238000012544 monitoring process Methods 0.000 claims abstract description 21
- 238000011897 real-time detection Methods 0.000 claims abstract description 15
- 230000005611 electricity Effects 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 230000009466 transformation Effects 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 8
- 238000012423 maintenance Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007537 lampworking Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000011664 signaling Effects 0.000 description 2
- 206010039203 Road traffic accident Diseases 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/097—Supervising of traffic control systems, e.g. by giving an alarm if two crossing streets have green light simultaneously
Abstract
The present invention relates to Intelligent road technical field of transportation, and in particular to a kind of traffic signal light condition monitoring system and method.The traffic signal light condition monitoring system includes at least one traffic lights lamp group, at least one terminal installation, collects cell arrangement and road traffic signal controller;The terminal installation, input terminal are correspondingly connected with traffic lights lamp group, and communication terminal connects the communication terminal for collecting cell arrangement, for the actual operation parameters of real time detection signal lamp, and feeds back to and collect cell arrangement;The road traffic signal controller connects the terminals end of traffic lights lamp group and collects cell arrangement, for the light color of real-time control traffic lights lamp group, and sends the light color control signal of traffic lights lamp group in real time to collecting cell arrangement;It is described to collect cell arrangement, for summarizing the signal lamp actual operation parameters of terminal installation feedback.The characteristics of traffic signal light condition monitoring system and method are practical, significant effect, easy to spread and existing crossing equipment transformation and upgrade.
Description
Technical field
The present invention relates to Intelligent road technical field of transportation, and in particular to a kind of traffic signal light condition monitoring system and side
Method.
Background technique
With the development of urban highway traffic, whether unobstructed people are higher and higher to traffic trip requirement.Traffic signals
Lamp is in front end in road traffic control system, and whether working condition normal, will directly affect traffic let pass it is whether unobstructed,
It also will cause traffic accident when serious.Therefore most important to the Working Status Monitoring of traffic lights.
Monitoring for traffic signal light condition, import and some domestic road traffic signal controllers itself can be examined
Survey the voltage of signal lamp drive output, current status.But due to domestic signal lamp transit equipment installation and
Actual working environment is complicated, which can not normal use.Such as: drive output has multiple lamp groups in parallel, even if there is a letter
Signal lamp damage, signal machine controller can not detect.In addition in many cases, drive output has residual voltage, Huo Zheyou at crossing
Inadequate in cable aging insulation performance, output has leakage current situation.The erroneous judgement that signal will be caused to control.These situations cause
Signal controller is difficult accurately to monitor the working condition of traffic lights.
Also occur some other signal lamp state detection mode methods in the market, it is mostly relatively simple, such as in signal control
Device side processed monitors the voltage and current of each signal lamp output end, and this mode is substantially the same as the measure voltage & current of signal controller
Function is consistent, nevertheless suffers from the restriction of above situation, using above there is limitation.
Currently, reporting for repairment for traffic signal light fault, main still to solve by artificial mode.For than heavier
It wants or busy crossing, failure feedback may be relatively more timely, but for remote crossing, it may several weeks or several
Month.
Summary of the invention
In order to solve the deficiencies in the prior art, the present invention provides a kind of traffic signal light condition monitoring system and side
The characteristics of method, the traffic signal light condition monitoring system and method are practical, significant effect, easy to spread and existing crossing
Scrap build upgrading.
The technical solution provided according to the present invention provides a kind of traffic signal light condition as the first aspect of the present invention
Monitoring system, the traffic signal light condition monitoring system include at least one traffic lights lamp group, at least one terminal dress
It sets, collect cell arrangement and road traffic signal controller;
The terminal installation, input terminal are correspondingly connected with traffic lights lamp group, and communication terminal connection collects the logical of cell arrangement
End is interrogated, for the actual operation parameters of real time detection signal lamp, and feeds back to and collects cell arrangement;
The road traffic signal controller connects the terminals of traffic lights lamp group and collects cell arrangement, for real-time
The light color of traffic lights lamp group is controlled, and the light color control signal for sending traffic lights lamp group in real time is filled to unit is collected
It sets;
It is described to collect cell arrangement, for summarizing the signal lamp actual operation parameters of terminal installation feedback, believed according to road traffic
The light color control signal and actual operation parameters that number controller is sent judge signal lamp state.
Further, the terminal installation includes: the first power module, sample detecting module, the first control module and
One communication module;
First power module, for powering to terminal installation;
The sample detecting module, input terminal connect each signal lamp in traffic lights lamp group, the first control of output end connection
Module for the actual operation parameters of each signal lamp in real-time detection traffic lights lamp group, and the actual motion is joined
Number is sent to the first control module;
First communication module can establish communication connection with the cell arrangement that collects;
First control module, communication ends connect first communication module, and are joined according to the actual motion of each signal lamp
Number is compared the working condition for judging signal lamp with the default operational factor of each signal lamp, and signal lamp actual motion is joined
Several and signal lamp working condition judging result is sent to by the first communication module collects cell arrangement.
Further, the cell arrangement that collects includes second power supply module, the second control module and the second communication module;
The second power supply module, for collecting cell arrangement power supply to described;
Second communication module can establish communication link with the terminal installation and the road traffic signal controller
It connects;
Second control module, communication ends are connect with second communication module, for receiving the transmission of the second communication module
The light color of actual operation parameters information and traffic lights lamp group controls signal, and sent according to road traffic signal controller
Light color control signal and actual operation parameters judge signal lamp state.
Further, second communication module includes A communication module and B communication module;The A communication module, is used for
It establishes and communicates to connect with the terminal installation, receive the actual operation parameters of the signal lamp of the terminal installation feedback;The B is logical
Module is interrogated, for connecting with the road traffic signal controller, receives the light color control that the traffic signal control is sent
Signal.
As a second aspect of the invention, a kind of traffic signal light condition monitoring method, the traffic lights shape are provided
State monitoring method includes:
The actual operation parameters of terminal installation real time detection signal lamp, and feed back to and collect cell arrangement;
The light color of road traffic signal controller real-time control traffic lights lamp group, and traffic lights lamp group is sent in real time
Light color control signal is collected cell arrangement;
Collect the signal lamp actual operation parameters that cell arrangement summarizes terminal installation feedback;
Collect the light color that cell arrangement is sent according to road traffic signal controller and controls signal and actual operation parameters to signal
Lamp state is judged.
Further, the actual operation parameters of the step terminal installation real time detection signal lamp, and feed back to and collect list
The specific process of element apparatus includes:
It powers for taking electricity from the power supply line of traffic lights lamp group, and to terminal installation;
The actual operation parameters of each signal lamp in real-time detection traffic lights lamp group;
And judgement signal is compared with the default operational factor of each signal lamp according to the actual operation parameters of each signal lamp
The working condition of lamp;
Communication connection is established with the cell arrangement that collects;
The working condition judging result of signal lamp actual operation parameters and signal lamp is sent to collecting cell arrangement.
Further, the step: collect the light color control letter that cell arrangement is sent according to road traffic signal controller
Number and actual operation parameters detailed process that signal lamp state is judged include:
It establishes and communicates to connect with the terminal installation and the road traffic signal controller;
Obtain the actual operation parameters information that terminal installation is sent and the traffic lights that road traffic signal controller is sent
The light color of lamp group controls signal;
The light color control signal and actual operation parameters sent according to road traffic signal controller sentences signal lamp state
It is disconnected.
From the above as can be seen that traffic signal light condition provided by the invention monitors system and method, with existing skill
Art, which is compared, has following advantages: terminal installation realizes the practical electric state detection of traffic lights, collects cell arrangement completion
All terminals electrically acquire summarizing for information, while being communicated with traffic signaling equipment, and all letters of signal machine controller are obtained
The control information of signal lamp, and the control information and virtual condition of signal lamp are compared, judge whether signal lamp work is normal, and will
Detection information feeds back to traffic signal control.This mode can in time, the working condition of accurate response signal lamp, thus sharp
It is reported with the failure that existing traffic administration platform carries out traffic lights and maintenance management, realization traffic lights is intelligently managed
Reason, and there is very strong practicability.
Detailed description of the invention
Fig. 1 is the electrical connection schematic diagram of first aspect present invention.
Fig. 2 is the topological diagram of first aspect present invention.
Fig. 3 is the structural topology figure of the terminal installation in first aspect present invention.
Fig. 4 is the structural topology figure for collecting cell arrangement in first aspect present invention.
Collect cell arrangement 1. terminal installation, 2., 3. road traffic signal controllers, 4. traffic lights lamp groups,
5. the first power module, 6. sample detecting modules, 7. first control modules, 8. first communication modules, 9. second source moulds
Block, 10. second communication modules, 11. second control modules.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, and reference
Attached drawing, the present invention is described in more detail.Wherein identical components are presented with like reference characters.It needs to illustrate
It is that word "front", "rear" used in the following description, "left", "right", "up" and "down" refer to the direction in attached drawing.It uses
Word "inner" and "outside" refer respectively to the direction towards or away from geometric center of specific component.
A kind of traffic signal light condition monitoring system is provided as the first aspect of the present invention, it is described as shown in Fig. 1 ~ Fig. 4
Traffic signal light condition monitoring system includes: at least one traffic lights lamp group 4, at least one terminal installation 1, collects unit
Device 2 and road traffic signal controller 3;It include: red light, amber light and green per the signal lamp in usual traffic lights lamp group 4
Lamp;
Terminal installation 1, the input terminal of a terminal installation 1 are correspondingly connected with a traffic lights lamp group 4, the terminal dress
It sets 1 communication terminal and collects the communication terminal of cell arrangement 2;The terminal installation 1 is a self-contained unit, the terminal installation 1
Attachment is mounted in 4 lamp box of traffic lights lamp group at crossing, is respectively connected with each signal lamp of traffic lights lamp group 4,
The signal lamps such as voltage, electric current of the signal lamp state acquisition unit for real time detection signal lamp red light, amber light and green light are real
Border operating parameter, and collected signal lamp actual operation parameters are fed back to and collect cell arrangement 2.It is to be understood that eventually
End device 1 uses low power dissipation design, will not influence the normal work of traffic signal light group and road traffic signal controller 3.
Road traffic signal controller 3, the road traffic signal controller 3 and each signal of traffic lights lamp group 4
The terminals of lamp connect, and road traffic signal controller 3 is communicated to connect with cell arrangement 2 is collected, and is handed over for real-time control
The light color of ventilating signal lamp lamp group 4, and the light color control signal of traffic lights lamp group 4 is sent in real time to collecting cell arrangement 2.It needs
It to be explained, the traffic signal control controls equipment as common crossing traffic, and specific structure is not in model of the present invention
Within enclosing, do not elaborate.
Collect cell arrangement 2, the communication terminal for collecting cell arrangement 2 and connecting at least one terminal installation 1, terminal installation
1 is mounted on crossing traffic signal controller side, for summarizing the signal lamp actual operation parameters of the feedback of terminal installation 1, is used for root
The light color control signal and actual operation parameters sent according to road traffic signal controller 3 judges signal lamp state.
For the terminal installation 1 in as the first aspect of the present invention, the terminal installation 1 includes: the first power module
5, sample detecting module 6, the first control module 7 and the first communication module 8;
First power module 5, power supply collection terminal connect the power supply line of traffic lights lamp group 4, feeder ear connection first
Control module 7 and communication module are powered for taking electricity from the power supply line of traffic lights lamp group 4, and to terminal installation 1;
The sample detecting module 6, input terminal connect each signal lamp in traffic lights lamp group 4, output end connection first
Control module 7, for the actual operation parameters of each signal lamp in real-time detection traffic lights lamp group 4, and by the reality
Operating parameter is sent to the first control module 7;Preferably, the sample detecting module 6 includes voltage transformer and Current Mutual Inductance
Device, the voltage transformer and current transformer are used to acquire the voltage signal and current signal on each signal lamp driver;For
Guarantee the data accurate reliability of sampling, sample detecting module 6 is also filtered collected actual operation parameters.
First communication module 8 can establish communication connection with the cell arrangement 2 that collects;First communication module
8 using wireless communication mode (such as: zigbee), perhaps no matter wireless wired mode (such as RS485, power carrier) is or cable modem
News mode is mature electronic technology at present, specifically no longer describes.
First control module 7, communication ends connect first communication module 8, and according to the reality of each signal lamp
Operating parameter is compared the working condition for judging signal lamp with the default operational factor of each signal lamp, and signal lamp is practical
Operating parameter and the working condition judging result of signal lamp are sent to by the first communication module 8 collects cell arrangement 2;It is preferred that
Ground, first control module 7 can realize its described function using the device of model Atmega64A microprocessor.
For collecting cell arrangement 2 in as the first aspect of the present invention, the cell arrangement 2 that collects includes the second electricity
Source module 9, the second control module 11 and the second communication module 10;
The second power supply module 9, for powering to the cell arrangement 2 that collects;The preferably described second power supply module 9 passes through
Electricity is taken from the 220V AC power source in road traffic signal controller 3, is supplied to the normal work for collecting each module of cell arrangement 2
Make voltage, so that collecting the normal work of cell arrangement 2.
Second communication module 10 can be established with the terminal installation 1 and the road traffic signal controller 3
Communication connection;Preferably, second communication module 10 includes A communication module and B communication module;The A communication module, is used for
It establishes and communicates to connect with the terminal installation 1, receive the actual operation parameters for the signal lamp that the terminal installation 1 is fed back;The B
Communication module receives the light color control that the traffic signal control is sent for connecting with the road traffic signal controller 3
Signal processed.
Second control module 11, communication ends are connect with second communication module 10, for receiving the second communication
The light color of actual operation parameters information and traffic lights lamp group 4 that module 10 is sent controls signal, and is believed according to road traffic
The light color control signal and actual operation parameters that number controller 3 is sent judge signal lamp state.It is understood that institute
11 one side of the second control module is stated to summarize the signal lamp actual working state that each terminal installation 1 is sent;Another party
Face is communicated with traffic signal control, is obtained road traffic signal lamp controller in real time and is believed the control of each signal lamp group
Breath.Then by comparing processing to Signalized control signal and actual working state, judge the work of each signal lamp lamp group
Whether normal make.Traffic control signal controller is given if there is abnormal timely feedback;Preferably, second control module 11
Its described function can be realized using the device of model STM32F407ZGT6 microprocessor.
A kind of traffic signal light condition monitoring method, the traffic signal light condition are provided as a second aspect of the invention
Monitoring method the following steps are included:
S100: the actual operation parameters of 1 real time detection signal lamp of terminal installation, and feed back to and collect cell arrangement 2;
S200: the light color of 3 real-time control traffic lights lamp group 4 of road traffic signal controller, and traffic signals are sent in real time
The light color control signal of lamp lamp group 4 is collected cell arrangement 2;
S300: collect the signal lamp actual operation parameters that cell arrangement 2 summarizes the feedback of terminal installation 1;
S400: collect cell arrangement 2 according to the light color that road traffic signal controller 3 is sent and control signal and actual operation parameters
Signal lamp state is judged.
It is to be understood that the actual operation parameters of signal lamp include the electrical operations parameter such as voltage, electric current.
For the S100 step in the second aspect of the present invention, specifically include:
S110: it powers for taking electricity from the power supply line of traffic lights lamp group 4, and to terminal installation 1;
S120: the actual operation parameters of each signal lamp in real-time detection traffic lights lamp group 4;
S130: and judgement is compared with the default operational factor of each signal lamp according to the actual operation parameters of each signal lamp
The working condition of signal lamp;
S140: communication connection is established with the cell arrangement 2 that collects;
S150: the number information of current lamp group, the working condition judging result of signal lamp actual operation parameters and signal lamp are sent
To collecting cell arrangement 2.
For the S400 step in the second aspect of the present invention, specifically include:
S410: it is established and is communicated to connect by A communication module and the terminal installation 1, pass through B communication module and the road traffic
Signal controller 3 establishes communication connection;
S420: the actual operation parameters information that terminal installation 1 is sent and the friendship that road traffic signal controller 3 is sent are obtained
The light color of ventilating signal lamp lamp group 4 controls signal;
S430: light color control signal that road traffic signal controller 3 is sent and actual operation parameters to signal lamp state into
Row compares, and judges whether the operating status of traffic lights is normal;
S440: collecting cell arrangement 2 for the detection information of all traffic lights in crossing and be reported to traffic signal control, and on
It passes on traffic control center platform.
It is understood that traffic administration platform can be at once if exception occurs in some traffic lights lamp of crossing
It was found that there is abnormal signal lamp.So as to timely carry out fault alarm and maintenance.
The purpose of the present invention is overcoming the shortcomings of existing signal lamp working condition detection mode, a kind of new signal lamp detection is provided
Mode and detection system, i.e. each signal lamp group side installation electric state at crossing detect terminal installation 1, connect with signal lamp
It connects.In traffic signal control side, installation collects cell arrangement 2, connect with traffic signal control;Terminal installation 1 and collect list
Element apparatus 2 passes through wired or wireless communication.
Terminal installation 1 realizes the practical electric state detection of traffic lights, collects cell arrangement 2 and completes all terminal electricity
Gas acquisition information summarizes, while being communicated with traffic signaling equipment, and the control of all signal lamps of signal machine controller is obtained
Information, and the control information and virtual condition of signal lamp are compared, judge whether signal lamp work is normal, and it is anti-to will test information
It feeds traffic signal control.This mode can in time, the working condition of accurate response signal lamp, to utilize existing friendship
The failure that siphunculus platform carries out traffic lights reports and maintenance management, realizes traffic lights intelligent management, and have
Very strong practicability.
It should be understood by those ordinary skilled in the art that: the above is only a specific embodiment of the present invention, and
It is not used in the limitation present invention, all any modification, equivalent substitution, improvement and etc. within purport of the invention, done should all include
Within protection scope of the present invention.
Claims (7)
1. a kind of traffic signal light condition monitors system, which is characterized in that the traffic signal light condition monitoring system includes extremely
Few a traffic lights lamp group (4), at least one terminal installation (1) collect cell arrangement (2) and road traffic signal control
Device (3);
The terminal installation (1), input terminal are correspondingly connected with traffic lights lamp group (4), and communication terminal connection collects unit dress
The communication terminal for setting (2), for real time detection signal lamp actual operation parameters and feed back to and collect cell arrangement (2);
The road traffic signal controller (3) connects the terminals of traffic lights lamp group (4) and collects cell arrangement (2),
For the light color of real-time control traffic lights lamp group (4), and the light color for sending traffic lights lamp group (4) in real time controls signal
To collecting cell arrangement (2);
It is described to collect cell arrangement (2), for summarizing the signal lamp actual operation parameters of terminal installation (1) feedback, according to road
The light color control signal and actual operation parameters that traffic signal control (3) is sent judge signal lamp state.
2. traffic signal light condition as described in claim 1 monitors system, which is characterized in that the terminal installation (1) includes:
First power module (5), sample detecting module (6), the first control module (7) and the first communication module (8);
First power module (5), for powering to terminal installation (1);
The sample detecting module (6), input terminal connect each signal lamp in traffic lights lamp group (4), output end connection the
One control module (7), for the actual operation parameters of each signal lamp in real-time detection traffic lights lamp group (4), and by institute
It states actual operation parameters and is sent to the first control module (7);
First communication module (8) can establish communication connection with described collect cell arrangement (2);
First control module (7), communication ends connect first communication module (8), and according to the reality of each signal lamp
Operating parameter is compared the working condition for judging signal lamp with the default operational factor of each signal lamp, and signal lamp is practical
Operating parameter and the working condition judging result of signal lamp are sent to by the first communication module (8) collects cell arrangement (2).
3. traffic signal light condition as described in claim 1 monitors system, which is characterized in that described to collect cell arrangement (2)
Including second power supply module (9), the second control module (11) and the second communication module (10);
The second power supply module (9), for collecting cell arrangement (2) power supply to described;
Second communication module (10) can build with the terminal installation (1) and the road traffic signal controller (3)
Vertical communication connection;
Second control module (11), communication ends are connect with second communication module (10), for receiving the second communication mould
The light color of actual operation parameters information and traffic lights lamp group (4) that block (10) is sent controls signal, and according to road traffic
The light color control signal and actual operation parameters that signal controller (3) is sent judge signal lamp state.
4. traffic signal light condition as claimed in claim 3 monitors system, which is characterized in that second communication module (10)
Including A communication module and B communication module;The A communication module is communicated to connect for establishing with the terminal installation (1), is received
The actual operation parameters of the signal lamp of terminal installation (1) feedback;The B communication module, for believing with the road traffic
The connection of number controller (3) receives the light color control signal that the traffic signal control is sent.
5. a kind of traffic signal light condition monitoring method, which is characterized in that the traffic signal light condition monitoring method includes:
The actual operation parameters of terminal installation (1) real time detection signal lamp, and feed back to and collect cell arrangement (2);
The light color of road traffic signal controller (3) real-time control traffic lights lamp group (4), and traffic lights are sent in real time
The light color control signal of lamp group (4) is collected cell arrangement (2);
Collect the signal lamp actual operation parameters that cell arrangement (2) summarizes terminal installation (1) feedback;
Collect cell arrangement (2) and signal and actual operation parameters are controlled according to the light color that road traffic signal controller (3) is sent
Signal lamp state is judged.
6. traffic signal light condition monitoring method as claimed in claim 5, which is characterized in that the step terminal installation (1)
The actual operation parameters of real time detection signal lamp, and feed back to and collect the specific process of cell arrangement (2) and include:
It powers for taking electricity from the power supply line of traffic lights lamp group (4), and to terminal installation (1);
The actual operation parameters of each signal lamp in real-time detection traffic lights lamp group (4);
And judgement signal is compared with the default operational factor of each signal lamp according to the actual operation parameters of each signal lamp
The working condition of lamp;
Communication connection is established with described collect cell arrangement (2);
The working condition judging result of signal lamp actual operation parameters and signal lamp is sent to collecting cell arrangement (2).
7. traffic signal light condition monitoring method as claimed in claim 5, which is characterized in that the step: collecting unit dress
Set light color control signal that (2) are sent according to road traffic signal controller (3) and actual operation parameters to signal lamp state into
Row judgement detailed process include:
It establishes and communicates to connect with the terminal installation (1) and the road traffic signal controller (3);
Obtain the actual operation parameters information that terminal installation (1) is sent and the traffic that road traffic signal controller (3) is sent
The light color of signal lamp lamp group (4) controls signal;
The light color control signal and actual operation parameters sent according to road traffic signal controller (3) carries out signal lamp state
Judgement.
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CN110706499A (en) * | 2019-09-30 | 2020-01-17 | 潍坊畅讯交通设施工程有限公司 | Distributed traffic signal lamp fault detection device and control method |
CN112309146A (en) * | 2020-10-28 | 2021-02-02 | 平安科技(深圳)有限公司 | Intelligent control method and system of traffic signal lamp, storage medium and computing equipment |
CN113223318A (en) * | 2021-06-15 | 2021-08-06 | 浙江立为信息科技有限公司 | Monitoring method and system for signal lamp state real-time monitoring |
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CN113327449A (en) * | 2021-05-27 | 2021-08-31 | 阿波罗智联(北京)科技有限公司 | Method and device for detecting lamp state data |
CN113327449B (en) * | 2021-05-27 | 2024-01-02 | 阿波罗智联(北京)科技有限公司 | Method and device for detecting lamp state data |
CN113223318A (en) * | 2021-06-15 | 2021-08-06 | 浙江立为信息科技有限公司 | Monitoring method and system for signal lamp state real-time monitoring |
CN117518020A (en) * | 2023-12-28 | 2024-02-06 | 杭州方千科技有限公司 | Traffic signal lamp fault detection system and traffic signal device |
CN117518020B (en) * | 2023-12-28 | 2024-03-19 | 杭州方千科技有限公司 | Traffic signal lamp fault detection system and traffic signal device |
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