CN106781579A - Interim unmanned plane traffic lights and intersection monitoring system and control method - Google Patents

Interim unmanned plane traffic lights and intersection monitoring system and control method Download PDF

Info

Publication number
CN106781579A
CN106781579A CN201710101575.6A CN201710101575A CN106781579A CN 106781579 A CN106781579 A CN 106781579A CN 201710101575 A CN201710101575 A CN 201710101575A CN 106781579 A CN106781579 A CN 106781579A
Authority
CN
China
Prior art keywords
traffic lights
unmanned plane
monitoring system
interim
module
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710101575.6A
Other languages
Chinese (zh)
Inventor
彭璐
彭婷
曹奕
彭冬庚
谭雪梅
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanjing Forestry University
Original Assignee
Nanjing Forestry University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nanjing Forestry University filed Critical Nanjing Forestry University
Priority to CN201710101575.6A priority Critical patent/CN106781579A/en
Publication of CN106781579A publication Critical patent/CN106781579A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G08SIGNALLING
    • G08GTRAFFIC CONTROL SYSTEMS
    • G08G1/00Traffic control systems for road vehicles
    • G08G1/09Arrangements for giving variable traffic instructions
    • G08G1/095Traffic lights
    • G08G1/0955Traffic lights transportable
    • GPHYSICS
    • G08SIGNALLING
    • G08GTRAFFIC CONTROL SYSTEMS
    • G08G1/00Traffic control systems for road vehicles
    • G08G1/01Detecting movement of traffic to be counted or controlled
    • GPHYSICS
    • G08SIGNALLING
    • G08GTRAFFIC CONTROL SYSTEMS
    • G08G1/00Traffic control systems for road vehicles
    • G08G1/07Controlling traffic signals
    • G08G1/08Controlling traffic signals according to detected number or speed of vehicles

Abstract

The invention discloses a kind of interim unmanned plane traffic lights and intersection monitoring system and control method, system includes unmanned plane, central control module and the point duty lamp module, camera, loudspeaker, wireless communication module, memory and the electric supply installation that are connected with central control module are provided with unmanned plane, electric supply installation be system in electronic component power, unmanned plane has four rotor arms, four rotor arms constitute cross, point duty lamp module is suspended under rotor arm, and camera is provided with each rotor arm.The present invention can flexibly and easily adjust the height of traffic lights and monitoring system using unmanned plane as carrier, and unmanned plane is raised can be avoided monitoring dead angle, and the vehicle driver that can also prevent is blocked by cart cannot see that the situation of traffic lights occurs.Additionally it is possible to the vehicle flowrate that anticipation will pass through, and the working time based on this calculating traffic lights different conditions, calculating real-time, accuracy is high, and commander's effect is good.

Description

Interim unmanned plane traffic lights and intersection monitoring system and control method
Technical field
The invention belongs to unmanned plane applied technical field, and in particular to a kind of system directed traffic based on unmanned plane.
Background technology
In urban traffic control, traffic lights and monitoring device are essential electronic products.Existing crossing traffic Lamp and monitoring device are all fixed on lamp stand, by mains-supplied, once have a power failure occur that traffic paralysis and traffic accident are extracted The phenomenon of lack of evidence occurs.It is additionally, since crossing traffic lamp highly fixed, when vehicle passes through crossing, pilot's line of vision holds The tall and big occlusion easily gone together, leads to not see traffic lights change clearly in time, easily sends out unprofessional accident.It is similar to therewith, due to The height of monitoring device is also fixed, and its shooting angle is also easily by tall and big occlusion, it is impossible to fully evidence obtaining.
The content of the invention
To solve the above problems, the invention discloses a kind of traffic lights and intersection monitoring system based on unmanned aerial vehicle design, With unmanned plane as carrier, will direct traffic lamp and monitoring camera be arranged on unmanned plane as load, for directing traffic and Monitoring crossing.
In order to achieve the above object, the present invention provides following technical scheme:
A kind of interim unmanned plane traffic lights and intersection monitoring system, including unmanned plane, are provided with central control on the unmanned plane Module and the point duty lamp module, camera, loudspeaker, wireless communication module, the memory that are connected with central control module And electric supply installation, the electric supply installation be system in electronic component power, unmanned plane have four rotor arms, four rotor arms composition Cross, point duty lamp module is suspended under rotor arm, and camera is provided with each rotor arm.
Further, point duty lamp module includes DA chips, amplifying circuit and traffic lights, and DA chips are controlled with center Module is connected, and amplifying circuit is connected with DA chips and traffic lights respectively.
Further, the traffic lights are two-sided traffic lights.
Further, the central control module is single-chip microcomputer.
Further, the loudspeaker is arranged on immediately below rotor arm center.
Present invention also offers interim unmanned plane traffic lights and the control method of intersection monitoring system, the center on unmanned plane The DA chips that point duty lamp module is sent to after controller reading traffic lights command data carry out digital-to-analogue conversion, then by amplifying Circuit amplifies, and finally transmits to traffic lights, control traffic lights work;Camera captured in real-time image scene picture, in unmanned plane Central control module according to the shooting picture of airborne camera, by pattern-recognition, dynamic judges the vehicle flowrate of all directions Situation, according to the rule of internal configuration, adds algorithm and determines that traffic lights should allow the time for passing through in all directions, and according to meter The traffic lights time in all directions for obtaining carrys out Comprehensive Control each traffic lights work.
Further, the dynamic judges that the method for vehicle flowrate is:Unmanned plane is parked in the middle of crossing, and level altitude is clapped According to, for the image captured, the road conditions according to this crossing carry out trapezoidal segmentation, day and night are drawn according to date and time, The trapezoidal interior vehicle condition in each track in picture is analyzed, how many judgements are vacated according to trapezoidal top, analyze treating for per pass The vehicle queue distance and quantity for passing through.
Further, for the image captured in the dynamic method for judging vehicle flowrate, first with several standard forms Comparative analysis, reuses pattern-recognition.
Further, the road conditions include straight trip, turn left and bend quantity of turning right.
Further, also include:Obtain all directions of camera shooting on mobile terminals by wireless communication module The real time status of vehicle flowrate, by central controller, flexibly control the time of traffic lights.
Compared with prior art, the invention has the advantages that and beneficial effect:
Use unmanned plane traffic lights and intersection monitoring system that the present invention is provided, using unmanned plane as carrier, can be flexible The height of ground regulation traffic lights and monitoring system, unmanned plane is raised can be avoided monitoring dead angle, the vehicle drive that can also prevent Member is blocked by cart cannot see that the situation of traffic lights occurs.The invention provides user's real-time control mode, user can be with root The condition of road surface captured according to camera on unmanned plane controls the working condition of traffic lights at once.Additionally, the system can also be pre- Sentence the vehicle flowrate that will pass through, and the working time based on this calculating traffic lights different conditions, calculate real-time, accuracy is high, refers to Wave effect good.It is especially applicable to promptly being used in commercial power supply open circuit or traffic lights situation occurred.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention.
Fig. 2 is electric elements connection figure of the present invention.
Fig. 3 splits picture track schematic diagram to remind.
Specific embodiment
The technical scheme that the present invention is provided is described in detail below with reference to specific embodiment, it should be understood that following specific Implementation method is only illustrative of the invention and is not intended to limit the scope of the invention.
As shown in Figure 1 and Figure 2, a kind of interim unmanned plane traffic lights and intersection monitoring system include unmanned plane 1, on unmanned plane 1 It is provided with central control module, point duty lamp module 4, camera 2, loudspeaker 3, wireless communication module, memory and power supply Device, central control module and above-mentioned each electronic component are connected to send control instruction and from these elements to them respectively Receive data, electric supply installation be system in electronic component power.Central control module can use single-chip microcomputer, and 51 for such as commonly using are Row.Communication module can be using WiFi communication module, Mobile Communication Chip, Bluetooth communication chip etc., it is also possible to be provided simultaneously with above-mentioned Several communication chips, can be applied to different network environments.Memory can use TF read modules, coordinate TF cards to load Different content.Point duty lamp module includes the DA chips, amplifying circuit and the traffic lights that are sequentially connected electrically, during DA chips are connected to Centre control module.
Unmanned plane in this example has four rotor arms 5, and four rotor arms composition cross, loudspeaker is suspended on unmanned plane rotation Immediately below Yi Bei centers, a camera is hung with each rotor arm, the rotor arm of camera distance four on each rotor arm The distance at center is identical, keeps center of gravity in unmanned plane center of gravity.Electric supply installation uses battery pack, installed in the several of unmanned plane rotor arm What center., TF read modules are onboard to be placed in the battery pack of rotor arm on pcb board.Traffic lights is also suspended on rotor Under arm, the settable multiple of traffic lights.Need to keep balance in view of unmanned plane, therefore traffic should at least such as Fig. 1 shapes, dispersion suspension Under two rotor arms relative to each other.Two traffic lights are hung with two rotor arms relative in Fig. 1.Traffic lights is preferably Two-sided unrelated traffic lights, can carry out two-way commander on a road direction.As needed, can be hung under each rotor arm Traffic lights, can command the traffic of four direction, during suspension with respect to the traffic lights on two cantilevers apart from rotor arm center distance Should be equal so that center maintains the geometric center of gravity of four rotors, to keep unmanned plane to balance as far as possible.
Central control module on unmanned plane can read the content in memory, retransmit to traffic lights module, Point duty lamp module is lighted, extinguishes and flashed according to the instruction that central control module sends.Camera can shoot multiple side To live outdoor scene and send to central control module, central control module is stored in can sending data to memory, Real scene image can also be transmitted to user by wireless communication module.
Based on wireless communication module, interim unmanned plane traffic lights and intersection monitoring system in the present invention can be moved with user Dynamic terminal device(Such as mobile phone, IPAD)Connection.Control software can be installed on mobile terminal device, software is manipulated by, User can manipulate unmanned plane and fly to fixed position, and the traffic lights that the central controller on operation unmanned plane is read in TF cards refers to Wave data.The data is activation carries out digital-to-analogue conversion to the DA chips of point duty lamp module, then is amplified by amplifying circuit, finally Transmit to traffic lights, control lighting, extinguish and flashing for traffic lights.When needing to be propagandaed directed to communicate, user is to mobile terminal The microphone of equipment carries out voice recording, and speech data is delivered to central controller of the invention, center control by WiFi communication Device processed is sent to the DA chips of loudspeaker module and be sent to after digital-to-analogue conversion after amplifying circuit is amplified and will finally be put into Signal be sent to loudspeaker.Camera shoot scene can real-time Transmission to customer mobile terminal, for user's monitor in real time. Traffic police obtains the real time status of all directions vehicle flowrate that camera under unmanned plane shoots, can be by central controller, flexibly Control the time of traffic lights.Central control module in unmanned plane can also be according to the shooting picture of airborne camera, by mould Formula recognizes that dynamic judges the vehicle flowrate situation of all directions, according to the rule of internal configuration, adds algorithm(Such as:Vehicle flowrate is divided into 5 grades, if 5 grades, the direction time of passing through is 60 seconds;4 grades, the direction time of passing through is 50 seconds, 3 grades of correspondences 40 seconds, 2 grades of correspondences 30 Second, 1 grade of correspondence 20 seconds;)Determine that traffic lights should allow the time for passing through in all directions, and according to all directions being calculated On the traffic lights time carry out the work of Comprehensive Control each traffic lights.Market traffic flow detector is usually to detect a certain place The vehicle of process, from a direction in the present invention will need by vehicle it is different, therefore using the common car of in the market Flow detector is not used in carrying out flow anticipation in the present invention.The present invention provide vehicle flowrate determination methods be:Unmanned plane stops In the middle of crossing, level altitude(Trapezoidal segmentation is conveniently carried out, and is contrasted with template), taken pictures, for capture image, such as Shown in Fig. 3, according to the road conditions at this crossing(Keep straight on, turn left and turn right bend quantity)Trapezoidal segmentation is carried out, according to date and time Day and night is drawn, the trapezoidal interior vehicle condition in each track in picture is analyzed, trapezium base is closest to the side at crossing To, how many judgements are vacated according to trapezoidal top, analyze the vehicle queue distance for waiting to pass through and substantially quantity of per pass.Specific side Method be first with several standard form comparative analyses, reuse intensity contrast pattern-recognition, the image of every 3 or 5 seconds of collection, car The different situation of stream(1 grade:Without car, two grades:There are car, three-level:Compare many cars, level Four:Many cars, Pyatyi:Car is blocked up), according to Template compares, and identical area is different, vehicle flowrate is judged according to how much of the same area, percentage how much, here Do not need accurate vehicle flowrate numeral, as long as rank substantially, as long as be divided into 5 grades (by 5 grades of areas set in advance or Percentage range value judges) just, the picture scope and time that can be recognized with the simplified mode.
Technological means disclosed in the present invention program is not limited only to the technological means disclosed in above-mentioned implementation method, also includes Constituted technical scheme is combined by above technical characteristic.It should be pointed out that for those skilled in the art For, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications are also considered as Protection scope of the present invention.

Claims (10)

1. a kind of interim unmanned plane traffic lights and intersection monitoring system, it is characterised in that:Including unmanned plane, set on the unmanned plane It is equipped with central control module and the point duty lamp module, camera, loudspeaker, the radio communication that are connected with central control module Module, memory and electric supply installation, the electric supply installation be system in electronic component power, unmanned plane have four rotor arms, Four rotor arms constitute cross, and point duty lamp module is suspended under rotor arm, and camera is provided with each rotor arm.
2. interim unmanned plane traffic lights according to claim 1 and intersection monitoring system, it is characterised in that:Traffic lights Module includes DA chips, amplifying circuit and traffic lights, and DA chips are connected with central control module, amplifying circuit respectively with DA cores Piece and traffic lights are connected.
3. interim unmanned plane traffic lights according to claim 1 and intersection monitoring system, it is characterised in that:The traffic refers to Lamp is waved for two-sided traffic lights.
4. interim unmanned plane traffic lights according to claim 1 and intersection monitoring system, it is characterised in that:The center control Molding block is single-chip microcomputer.
5. interim unmanned plane traffic lights according to claim 1 and intersection monitoring system, it is characterised in that:The loudspeaker It is arranged on immediately below rotor arm center.
6. the control method of interim unmanned plane traffic lights and intersection monitoring system, it is characterised in that comprise the following steps:Unmanned plane On central controller to read and be sent to the DA chips of point duty lamp module after traffic lights command data and carry out digital-to-analogue conversion, then Amplified by amplifying circuit, finally transmitted to traffic lights, control traffic lights work;Camera captured in real-time image scene picture, Central control module in unmanned plane, by pattern-recognition, dynamically judges all directions according to the shooting picture of airborne camera Vehicle flowrate situation, according to the rule of internal configuration, add algorithm and determine that traffic lights should allow the time for passing through in all directions, And according to the traffic lights time in all directions being calculated come Comprehensive Control each traffic lights work.
7. the control method of interim unmanned plane traffic lights according to claim 6 and intersection monitoring system, it is characterised in that The dynamic judges that the method for vehicle flowrate is:Unmanned plane is parked in the middle of crossing, and level altitude is taken pictures, for the figure captured Picture, the road conditions according to this crossing carry out trapezoidal segmentation, and day and night is drawn according to date and time, analysis in picture each Vehicle condition in track is trapezoidal, how many judgements are vacated according to trapezoidal top, analyze the vehicle queue for waiting to pass through of per pass away from From and quantity.
8. the control method of interim unmanned plane traffic lights according to claim 6 and intersection monitoring system, it is characterised in that: For the image captured in the dynamic method for judging vehicle flowrate, first with several standard form comparative analyses, mould is reused Formula is recognized.
9. the control method of interim unmanned plane traffic lights according to claim 6 and intersection monitoring system, it is characterised in that: The road conditions include straight trip, turn left and bend quantity of turning right.
10. the control method of interim unmanned plane traffic lights according to claim 6 and intersection monitoring system, its feature exists In:Also comprise the following steps:Obtain all directions vehicle flowrate of camera shooting on mobile terminals by wireless communication module Real time status, by central controller, flexible time of control traffic lights.
CN201710101575.6A 2017-02-24 2017-02-24 Interim unmanned plane traffic lights and intersection monitoring system and control method Pending CN106781579A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710101575.6A CN106781579A (en) 2017-02-24 2017-02-24 Interim unmanned plane traffic lights and intersection monitoring system and control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710101575.6A CN106781579A (en) 2017-02-24 2017-02-24 Interim unmanned plane traffic lights and intersection monitoring system and control method

Publications (1)

Publication Number Publication Date
CN106781579A true CN106781579A (en) 2017-05-31

Family

ID=58960821

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710101575.6A Pending CN106781579A (en) 2017-02-24 2017-02-24 Interim unmanned plane traffic lights and intersection monitoring system and control method

Country Status (1)

Country Link
CN (1) CN106781579A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107424420A (en) * 2017-06-23 2017-12-01 安徽超清科技股份有限公司 Intelligent transportation managing and control system based on unmanned plane
CN108205903A (en) * 2017-12-22 2018-06-26 广东容祺智能科技有限公司 A kind of unmanned plane meet an urgent need traffic guidance monitor system and its commander measure of supervision
CN108766000A (en) * 2018-07-21 2018-11-06 徐州飞梦电子科技有限公司 One kind being tethered at unmanned plane traffic light systems and its working method
CN109118767A (en) * 2018-09-05 2019-01-01 盐城骏拔汽车零部件有限公司 Intelligent transportation system based on unmanned plane
CN109523809A (en) * 2018-11-20 2019-03-26 海南大学 Aerial mobile shows comprehensive platform
CN111932906A (en) * 2020-08-07 2020-11-13 深圳市深汕特别合作区智慧城市研究院有限公司 Automatic control system of emergency traffic signal lamp linked with multifunctional intelligent rod
CN113112829A (en) * 2021-04-19 2021-07-13 重庆交通职业学院 Method and device for improving road safety by self-adaptive traffic signal lamp
CN113920742A (en) * 2021-11-29 2022-01-11 安徽庐峰交通科技有限公司 Control method for cooperative linkage of movable signal lamp and electronic police at intersection
DE102020211621A1 (en) 2020-09-16 2022-03-17 Volkswagen Aktiengesellschaft Unmanned aircraft to support traffic safety facilities, method to support a defective traffic light system to regulate traffic flows, system to support traffic safety facilities
TWI777223B (en) * 2020-08-21 2022-09-11 交通部運輸研究所 Unmanned aerial vehicle traffic survey system and method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1821246A2 (en) * 2006-02-16 2007-08-22 Saab Ab Controlling of an autonomous platform
CN102654940A (en) * 2012-05-23 2012-09-05 上海交通大学 Traffic information acquisition system based on unmanned aerial vehicle and processing method of traffic information acquisition system
CN105551280A (en) * 2016-03-09 2016-05-04 武汉博感空间科技有限公司 Unmanned aerial vehicle traffic signal indicating system
CN205665876U (en) * 2016-05-21 2016-10-26 北京博鹰通航科技有限公司 Many rotor unmanned aerial vehicle of emergent traffic guidance
CN206532423U (en) * 2017-02-24 2017-09-29 南京林业大学 Interim unmanned plane traffic lights and intersection monitoring system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1821246A2 (en) * 2006-02-16 2007-08-22 Saab Ab Controlling of an autonomous platform
CN102654940A (en) * 2012-05-23 2012-09-05 上海交通大学 Traffic information acquisition system based on unmanned aerial vehicle and processing method of traffic information acquisition system
CN105551280A (en) * 2016-03-09 2016-05-04 武汉博感空间科技有限公司 Unmanned aerial vehicle traffic signal indicating system
CN205665876U (en) * 2016-05-21 2016-10-26 北京博鹰通航科技有限公司 Many rotor unmanned aerial vehicle of emergent traffic guidance
CN206532423U (en) * 2017-02-24 2017-09-29 南京林业大学 Interim unmanned plane traffic lights and intersection monitoring system

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107424420A (en) * 2017-06-23 2017-12-01 安徽超清科技股份有限公司 Intelligent transportation managing and control system based on unmanned plane
CN108205903A (en) * 2017-12-22 2018-06-26 广东容祺智能科技有限公司 A kind of unmanned plane meet an urgent need traffic guidance monitor system and its commander measure of supervision
CN108766000A (en) * 2018-07-21 2018-11-06 徐州飞梦电子科技有限公司 One kind being tethered at unmanned plane traffic light systems and its working method
CN109118767A (en) * 2018-09-05 2019-01-01 盐城骏拔汽车零部件有限公司 Intelligent transportation system based on unmanned plane
CN109523809A (en) * 2018-11-20 2019-03-26 海南大学 Aerial mobile shows comprehensive platform
CN111932906A (en) * 2020-08-07 2020-11-13 深圳市深汕特别合作区智慧城市研究院有限公司 Automatic control system of emergency traffic signal lamp linked with multifunctional intelligent rod
CN111932906B (en) * 2020-08-07 2021-07-09 深圳市深汕特别合作区智慧城市研究院有限公司 Automatic control system of emergency traffic signal lamp linked with multifunctional intelligent rod
TWI777223B (en) * 2020-08-21 2022-09-11 交通部運輸研究所 Unmanned aerial vehicle traffic survey system and method thereof
DE102020211621A1 (en) 2020-09-16 2022-03-17 Volkswagen Aktiengesellschaft Unmanned aircraft to support traffic safety facilities, method to support a defective traffic light system to regulate traffic flows, system to support traffic safety facilities
CN113112829A (en) * 2021-04-19 2021-07-13 重庆交通职业学院 Method and device for improving road safety by self-adaptive traffic signal lamp
CN113920742A (en) * 2021-11-29 2022-01-11 安徽庐峰交通科技有限公司 Control method for cooperative linkage of movable signal lamp and electronic police at intersection
CN113920742B (en) * 2021-11-29 2023-11-28 安徽庐峰交通科技有限公司 Control method for cooperation linkage of movable signal lamp at intersection and electronic police

Similar Documents

Publication Publication Date Title
CN106781579A (en) Interim unmanned plane traffic lights and intersection monitoring system and control method
CN103500508B (en) A kind of intelligent transportation system
CN206532423U (en) Interim unmanned plane traffic lights and intersection monitoring system
CN204210361U (en) Weather monitoring command van
CN103051873B (en) Track type wireless mobile video monitoring system of electric power tunnel
CN104952260A (en) Wireless traffic monitoring device
CN102881154B (en) Vehicle scheduling equipment, vehicular terminals, vehicle scheduling system and vehicle scheduling method
CN104077913A (en) Multi-view image information-fused traffic accident monitoring method and device
CN108230481A (en) Patrol monitors system and method to a kind of cell based on wisdom lamp stand safely
CN205751184U (en) Vehicle accident alarm
CN103455898B (en) Railway goods yard information management system
CN108932858A (en) A kind of highway congestion warning system based on emphasis commerial vehicle location information
CN208054744U (en) A kind of crane hook full view monitoring device and system
CN211668520U (en) Automatic aerial photography system of transmission tower equipment based on unmanned aerial vehicle
CN107170187B (en) High-tension electricity equipment availability vehicle location early warning system and method
CN103010261A (en) Monocular-vision-based anti-collision early warning system for rail transit
CN207924912U (en) A kind of intelligent electronic license plate identification device
CN203851160U (en) Remotely-controlled automatic automobile scale weighing management system
CN111377360A (en) Tower crane unmanned system
CN204925760U (en) Hoist safety control system based on internet of things
CN109040181A (en) A kind of new car networked terminals
CN215361359U (en) Early warning device for plane shunting operation
CN201853354U (en) Bluetooth road management system
CN203870688U (en) Public transportation digital television remote monitoring system
CN208781399U (en) One kind being based on intelligent transportation pattern recognition device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20170531

RJ01 Rejection of invention patent application after publication