CN111489566A - Encryption and decryption type traffic signal control system and method for self health state monitoring - Google Patents
Encryption and decryption type traffic signal control system and method for self health state monitoring Download PDFInfo
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- CN111489566A CN111489566A CN202010425933.0A CN202010425933A CN111489566A CN 111489566 A CN111489566 A CN 111489566A CN 202010425933 A CN202010425933 A CN 202010425933A CN 111489566 A CN111489566 A CN 111489566A
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/07—Controlling traffic signals
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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
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- H—ELECTRICITY
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- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
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Abstract
The encryption and decryption type traffic signal control system for self health state monitoring comprises a server, a platform display screen and a plurality of traffic signal control devices, wherein the traffic signal control devices are communicated with the server, and each traffic signal control device comprises a box body, a power distribution unit, a main control board, a power supply, a plurality of lamp driving boards, a plurality of wiring rows and an independent yellow flashing device. The control method of the invention comprises the following steps: a) traffic signal control; b) data acquisition and learning; c) data encryption and transmission; d) data decryption and storage; e) self-monitoring; f) device event and regional event determination. The traffic signal control system and the method monitor the self voltage, current, power and energy consumption, acquire the environmental temperature and humidity information in real time, monitor the self health state, solve the problem that the existing traffic signal is easy to attack and crack by encrypting the traffic data, can cut off the abnormal type of the data and are beneficial to taking corresponding measures.
Description
Technical Field
The present invention relates to a traffic signal control system and method, and more particularly, to an encryption/decryption type traffic signal control system and method for self health status monitoring.
Background
The road traffic signal control system is used as a traffic infrastructure facility and plays a very important role in the field of intelligent traffic, whether the signal is normal or not is directly related to traffic safety, and the abnormal state of the traffic signal even threatens the life safety of human beings. Although the existing road traffic signal control system can detect the state of a signal lamp, the system cannot detect the health state of the system, and once the system has a problem, the signal of the whole intersection is disordered.
Although the industry of the road traffic signal control system has unified national standards, the standards only specify a communication protocol format and do not unify control instructions of the road traffic signal control system, so that the road traffic signal control systems of different manufacturers in different periods cannot be managed and controlled in a unified way, and the requirement of building a signal control unified platform to realize the comprehensive management of the road traffic signal control systems of different manufacturers is clearly proposed in the department of management of Beijing, Shenzhen, Chengdu, Hefei, Jiaxing and the like in the end of 2019. The demand of the management and control system of the road traffic signal control system is more and more strong. Once the road traffic signal control system stipulates a unified control instruction, a plaintext transmission mode used in network transmission of the road traffic signal control system is easy to crack, so that great threat is caused to signal safety, and the road traffic signal control system needs to use an encryption and decryption mode for transmission.
Disclosure of Invention
The present invention provides an encryption/decryption type traffic signal control system and method for self health status monitoring to overcome the above technical problems.
The encryption and decryption type traffic signal control system for self health state monitoring comprises a server, a platform display screen and a plurality of traffic signal control devices arranged on a road, wherein the traffic signal control devices are communicated with the server in a wired or wireless communication mode, and the platform display screen is connected with the server and used for displaying state information of the traffic signal devices; the method is characterized in that: the traffic signal control device consists of a box body, and a power distribution unit, a main control board, a power supply, a plurality of lamp driving boards, a plurality of wiring rows and an independent yellow flashing device which are arranged in the box body, wherein the main control board consists of a main processor, and a network unit, an electric energy acquisition unit, an encryption and decryption unit, a storage unit, a conventional service processing unit and a network unit which are connected with the main processor; the power distribution unit is internally provided with a main power unit and a power distribution unit, the input end of the main power unit is connected with 220V alternating current commercial power, the output end of the main power unit is connected with the input end of the power distribution unit after passing through an electric energy acquisition unit on a main control board, the output of the power distribution unit is connected with a power supply, a lamp driving board and the power supply input end of an independent yellow flasher, the output of the power supply supplies power to the main control board, the lamp driving board and the independent yellow flasher, and the output of the independent yellow flasher is connected with a wiring row;
the output control end of the main control panel is connected with the control ends of the lamp driving panels and the independent yellow flashing devices, a main processor in the main control panel collects current, voltage and energy consumption data of the whole traffic signal control device through an electric energy collecting unit, the main processor is communicated with the server through a network unit, the collected data are encrypted and then sent to the server through an encryption and decryption unit and received data are decrypted, the on-off state of the wiring ends on the independent yellow flashing devices and each lamp driving panel is controlled through a conventional business processing unit, and the collected data are stored through a storage unit.
The invention discloses an encryption and decryption type traffic signal control system for self health state monitoring, wherein a front door and a rear door are respectively arranged at the front and the rear of a box body, a front electric control door lock and a rear electric control door lock are respectively arranged on the front door and the rear door, a front door control switch and a rear door control switch for respectively detecting the opening and closing states of the front door and the rear door are arranged on the box body, a manual control box and an antenna are arranged on the side surface of the box body, the front electric control door lock, the rear electric control door lock and the antenna are all connected with the output end of a main control board, and the front door control switch, the rear door control switch and the manual control box are all connected with the input end of.
The encryption and decryption type traffic signal control system for self health state monitoring is characterized in that an air circuit breaker and an automatic electronic switching-on circuit protection device are arranged in a main power unit, an input alternating current commercial power is connected with an electric energy acquisition unit on a main control board after passing through the air circuit breaker and the automatic electronic switching-on circuit protection device, the electric energy acquisition unit adopts a chip with the model of H L W8032, and an encryption unit adopts a chip with the signal of TF32A9FD L1.
The invention discloses a control method of an encryption and decryption type traffic signal control system for self health state monitoring, which is characterized by comprising the following steps of:
a) the traffic signal control, the main control board controls the signal lamp conversion of the traffic road intersection through the lamp control board according to the set traffic signal conversion rule so as to control the orderly operation of vehicles at the intersection;
b) acquiring and learning data, wherein a main control board in each traffic signal control device acquires voltage, current and energy consumption data of the whole device, performs timing learning and data characteristic analysis to form a standard calibration data curve of the voltage, the current and the energy consumption data, and then stores the data in a storage unit;
c) data encryption and transmission, wherein a plurality of non-copyable encryption algorithms are stored in an encryption unit, each encryption algorithm has a unique algorithm code corresponding to the unique algorithm code, and the traffic signal control device transmits data to a server through the following steps:
c-1), randomly selecting an algorithm, wherein a microcontroller in the main control board randomly selects an encryption algorithm from a plurality of encryption algorithms, and judges whether the algorithm is adopted in the last communication, if so, the step c-2) is executed, and if not, the step c-3) is executed;
c-2), judging the life cycle of the algorithm, judging whether the continuous use time length of the selected encryption algorithm exceeds the set life cycle, if so, executing the step c-1), replacing a new encryption algorithm, and if not, executing the step c-3);
c-3), encrypting and sending data, encrypting the acquired standard calibration data curve of voltage, current and energy consumption by the main control board by using a selected algorithm, and sending the encrypted data and the algorithm code corresponding to the encryption algorithm to the server;
d) after receiving the data sent by the traffic signal control device, the server finds a corresponding decryption algorithm according to an encryption algorithm code in the data, and decrypts and stores the received data;
e) monitoring by the traffic signal control device, acquiring voltage, current and energy consumption data of the traffic signal control device in real time by the traffic signal control device, comparing the data with a standard calibration data curve stored in the local machine, if the data exceeds the early warning curve, indicating that the current data is abnormal, encrypting the abnormal data according to the step c), and sending the encrypted data to a server to execute the step f);
f) judging device events and regional events, decrypting abnormal data after the server receives the abnormal data, and then judging the events according to the following steps:
f-1), sending a collaborative search instruction, finding n traffic signal control devices at the front end and n traffic signal control devices at the rear end of the data abnormal device by the server, and sending the collaborative search instruction to the 2n devices;
f-2), uploading data, and uploading the voltage, current and energy consumption data collected in real time to the server after the 2n traffic signal control devices receive the investigation command sent by the server;
f-3), data comparison, namely decrypting the uploaded data after the server receives the uploaded data, comparing the current data of 2n +1 devices with the historical data of the devices and the historical data of the devices, and comparing the devices with each other, judging the devices to be regional events if two or more devices have long-time data abnormality exceeding a set time, and pushing an alarm of the regional events to a platform display screen; if the traffic signal control device in the step e) has data abnormity, judging that the device event exists, and pushing an alarm of the area event to a platform display screen.
The invention has the beneficial effects that: according to the encryption and decryption type traffic signal control system and method for self health state monitoring, each traffic signal control device is communicated with a server, a power distribution unit provides electric energy for a main control board, a lamp driving board, an independent yellow flasher and other devices, and the main control board controls normal operation of traffic intersection signal lamps through the lamp driving board and the independent yellow flasher; the traffic signal control device collects voltage, current and electric energy data of the traffic signal control device in real time, learns and stores the data and uploads the data to the server, the traffic signal control device compares the self energy consumption data collected in real time with historical data, if the data are abnormal, the traffic signal control device sends the data to the server, the server obtains the real-time energy consumption data of an abnormal device and a plurality of devices in front of and behind the abnormal device, regional events or device events are obtained by comparing the data of each device and comparing the data between the devices, and judgment results are pushed to a platform display screen to be displayed.
Therefore, the encryption and decryption type traffic signal control system and method for self health state monitoring solve the problems that the existing traffic signals are easy to attack and crack by randomly encrypting the traffic signal data, and ensure the signal safety; the event type of the data abnormity can be accurately judged through the monitoring of the control device and the judgment of the server, and corresponding measures can be taken for the data abnormity condition.
Drawings
FIG. 1 is a schematic diagram of an encryption/decryption type traffic signal control system for self health status monitoring according to the present invention;
FIG. 2 is a perspective view of the traffic signal control device of the present invention looking away from the front door;
FIG. 3 is a perspective view of the traffic signal control device of the present invention looking away from the back door;
FIG. 4 is a schematic circuit diagram of the traffic signal control apparatus of the present invention;
FIG. 5 is a schematic circuit diagram of the main control board of the present invention;
FIG. 6 is a circuit diagram of an electric energy collection unit according to the present invention;
fig. 7 is a circuit diagram of an encryption unit in the present invention.
In the figure: the system comprises a traffic signal control device 1, a server 2, a platform display screen 3, an independent yellow flashing device 4, a box 5, a power supply 6, a main control panel 7, a reserved space 8, a power distribution unit 9, lamp control panels 10 to 17, a rack 18, a front box door 19, a front electric control door lock 20, a front electric control switch 21, a rear electric control door lock 22, a rear electric control switch 23, wiring rows 24 to 31, a manual control box 32, an antenna press 33, a rear box door 34, a main processor 35, an electric energy acquisition unit 36, an encryption unit 37, a storage unit 38, a conventional business processing unit 39 and a network unit 40.
Detailed Description
The invention is further described with reference to the following figures and examples.
As shown in fig. 1, a schematic diagram of an encryption/decryption type traffic signal control system for self health status monitoring according to the present invention is provided, which is composed of a server 2, a platform display screen 3 and a plurality of traffic signal control devices 1 disposed at a traffic intersection, wherein the traffic signal control devices 1 communicate with the server 2 via a wired network or a wireless network, the network form can be a ring network, a wireless network or a private network, the server 2 and the platform display screen 3 are both disposed in a general control room, and the platform display screen 3 is in communication connection with the server 2 to display the status of the traffic signal control devices 1.
As shown in fig. 2, 3 and 4, a perspective view of the traffic signal control device 1 viewed from the front door, a perspective view of the traffic signal control device 1 viewed from the rear door and a circuit schematic diagram are respectively given, fig. 5 is a circuit schematic diagram of the main control board 7 of the present invention, the traffic signal control device 1 is composed of a box body 5, a power distribution unit 9, a power supply 6, the main control board 7, 8 lamp driving boards (10 to 17), 8 wiring rows (24 to 31) and an independent yellow flashing device 4, wherein the power distribution unit, the power supply, the main control board 7, the 8 lamp driving boards (10 to 17), the 8 wiring rows (24 to 31) and the independent yellow flashing device 4 are arranged in the box. The main control board 7 is composed of a main processor 35, an electric energy acquisition unit 36, an encryption unit 37, a storage unit 38, a conventional service processing unit 39 and a network unit 40, wherein the main processor 35 has the functions of signal acquisition, data operation and control output, the main processor 35 acquires current, voltage and energy consumption data of the whole traffic signal control device 1 through the electric energy acquisition unit 36, the main processor is communicated with a server through the network unit 40, the acquired data is encrypted and then sent to the server through the encryption and decryption unit 37 and the received data is decrypted, the on-off state of the independent yellow flasher and the wiring terminal on each lamp driving board is controlled through the conventional service processing unit 39, and the acquired data are stored through the storage unit 38.
The power distribution unit 9 is provided with a main power unit and a power distribution unit, the input end of the main power unit is connected with 220V alternating current, and the output of the main power unit is connected with the input end of the power distribution unit through an electric energy acquisition unit 36 on the main control board 7, so that the main control board 7 can detect the voltage, the current and the energy consumption of the whole traffic signal control device 1. An air circuit breaker and an automatic electronic closing circuit protection device are arranged in the main electric unit to realize electric leakage protection. The power output of the power distribution unit is connected with the input end of a power supply 6, the signal lamp power ends of lamp driving plates (10-17) and the signal lamp power end of an independent yellow flasher 4, 8 wiring bars (24-31) are respectively connected with the 8 lamp driving plates (10-17), the power line of a traffic signal lamp is connected to the wiring bars, and the power distribution unit provides power for the traffic signal lamp through the lamp driving plates and the wiring bars; when the yellow flashing occurs, the power distribution unit supplies power to the traffic signal lamp through the independent yellow flasher 4 and the wiring row. The power supply 6 converts the voltage provided by the power distribution power supply into low-voltage (such as 12V, 5V or 3.3V) direct current to provide direct current voltage for the normal work of the main control board 7, the lamp driving board and the independent yellow flasher.
The front and the back of the box body 5 are respectively provided with a front box door 19 and a back box door 34, the front box door and the back box door are respectively provided with a front electric control door lock 20 and a back electric control door lock 22, the box body 5 is provided with a front door control switch 21 and a back door control switch 23 which respectively detect the opening and closing states of the front box door 19 and the back box door 34, the side surface of the box body 5 is provided with a manual control box 32 and an antenna 33, the front electric control door lock 20, the back electric control door lock 22 and the antenna 33 are all connected with the output end of the main control board 7, the front door control switch 21, the back door control switch 23 and the manual control box 32 are all connected with the input end of the main control board, the main control board 7 can respectively control the opening of the front box door 19 and the back door lock 34 through the front electric control door lock 20 and the back electric control door lock 22, the opening and closing states of the front box door and the back box door can be respectively detected through the front door control switch 21 and the back door control switch 23, when a traffic manager needs to consider an interference traffic signal, the manual control box 32 is controlled as shown in fig. 6 and fig. 7, the electric energy collecting unit 36 and the.
The control method of the encryption and decryption type traffic signal control system for self health state monitoring is realized by the following steps:
a) the traffic signal control, the main control board controls the signal lamp conversion of the traffic road intersection through the lamp control board according to the set traffic signal conversion rule so as to control the orderly operation of vehicles at the intersection;
b) acquiring and learning data, wherein a main control board in each traffic signal control device acquires voltage, current and energy consumption data of the whole device, performs timing learning and data characteristic analysis to form a standard calibration data curve of the voltage, the current and the energy consumption data, and then stores the data in a storage unit;
c) data encryption and transmission, wherein a plurality of non-copyable encryption algorithms are stored in an encryption unit, each encryption algorithm has a unique algorithm code corresponding to the unique algorithm code, and the traffic signal control device transmits data to a server through the following steps:
c-1), randomly selecting an algorithm, wherein a microcontroller in the main control board randomly selects an encryption algorithm from a plurality of encryption algorithms, and judges whether the algorithm is adopted in the last communication, if so, the step c-2) is executed, and if not, the step c-3) is executed;
c-2), judging the life cycle of the algorithm, judging whether the continuous use time length of the selected encryption algorithm exceeds the set life cycle, if so, executing the step c-1), replacing a new encryption algorithm, and if not, executing the step c-3);
c-3), encrypting and sending data, encrypting the acquired standard calibration data curve of voltage, current and energy consumption by the main control board by using a selected algorithm, and sending the encrypted data and the algorithm code corresponding to the encryption algorithm to the server;
d) after receiving the data sent by the traffic signal control device, the server finds a corresponding decryption algorithm according to an encryption algorithm code in the data, and decrypts and stores the received data;
e) monitoring by the traffic signal control device, acquiring voltage, current and energy consumption data of the traffic signal control device in real time by the traffic signal control device, comparing the data with a standard calibration data curve stored in the local machine, if the data exceeds the early warning curve, indicating that the current data is abnormal, encrypting the abnormal data according to the step c), and sending the encrypted data to a server to execute the step f);
f) judging device events and regional events, decrypting abnormal data after the server receives the abnormal data, and then judging the events according to the following steps:
f-1), sending a collaborative search instruction, finding n traffic signal control devices at the front end and n traffic signal control devices at the rear end of the data abnormal device by the server, and sending the collaborative search instruction to the 2n devices;
f-2), uploading data, and uploading the voltage, current and energy consumption data collected in real time to the server after the 2n traffic signal control devices receive the investigation command sent by the server;
f-3), data comparison, namely decrypting the uploaded data after the server receives the uploaded data, comparing the current data of 2n +1 devices with the historical data of the devices and the historical data of the devices, and comparing the devices with each other, judging the devices to be regional events if two or more devices have long-time data abnormality exceeding a set time, and pushing an alarm of the regional events to a platform display screen; if the traffic signal control device in the step e) has data abnormity, judging that the device event exists, and pushing an alarm of the area event to a platform display screen.
In a normal state, the device collects the electric energy use condition in real time through the electric energy collection unit of the main control board 7 in fig. 5, and the conventional service processing unit of the main control board processes the conventional lamp control function. Taking device No. 15 in fig. 1 as an example, when data characteristics of the electric energy information collected by the electric energy collecting unit of the main control board 7 in fig. 5 and the electric energy information stored in the storage unit of the main control board 7 are abnormal, the device will send the abnormal electric energy characteristic information to the server through the encryption and decryption process, after the server receives the early warning information, the device No. 9, 10, 11, 14, 16, 21, 22 and 23 in FIG. 1 will be sent out the collaborating commands, after the 8 devices receive the information, the electric energy characteristic data collected in real time are sent to the server through the encryption and decryption processes, the server compares the 9 groups of data with the characteristic data of the devices and the data between the devices to determine whether the data are regional events, and if the regional electric energy data are abnormal for a long time, the regional events are pushed to the platform; if the power data of the device No. 15 in the figure 1 is abnormal for a long time, the event of the device is pushed to the platform.
Claims (4)
1. An encryption and decryption type traffic signal control system for self health state monitoring comprises a server (2), a platform display screen (3) and a plurality of traffic signal control devices (1) arranged on a road, wherein the traffic signal control devices are communicated with the server in a wired or wireless communication mode, and the platform display screen is connected with the server and used for displaying state information of the traffic signal devices; the method is characterized in that: the traffic signal control device comprises a box body (5), a power distribution unit (9), a main control board (7), a power supply (6), a plurality of lamp driving boards, a plurality of wiring rows and an independent yellow flashing device (4), wherein the power distribution unit, the main control board, the power supply and the independent yellow flashing device are arranged in the box body, and the main control board comprises a main processor (35), and a network unit (40), an electric energy acquisition unit (36), an encryption and decryption unit (37), a storage unit (38), a conventional service processing unit (39) and a network unit (40) which are connected with the main processor; the power distribution unit is internally provided with a main power unit and a power distribution unit, the input end of the main power unit is connected with 220V alternating current commercial power, the output end of the main power unit is connected with the input end of the power distribution unit after passing through an electric energy acquisition unit on a main control board, the output of the power distribution unit is connected with a power supply (6), a lamp driving board and the power supply input end of an independent yellow flasher, the output of the power supply (6) supplies power to the main control board, the lamp driving board and the independent yellow flasher, and the output of the independent yellow flasher is connected with a wiring row;
the output control end of the main control panel is connected with the control ends of the lamp driving panel and the independent yellow flashers, a main processor in the main control panel collects current, voltage and energy consumption data of the whole traffic signal control device (1) through an electric energy collecting unit (36), the main processor is communicated with a server through a network unit (40), the collected data are encrypted and then sent to the server through an encryption and decryption unit (37) and are received by decryption, the on-off state of a wiring terminal on the independent yellow flashers and each lamp driving panel is controlled through a conventional service processing unit (39), and the collected data are stored through a storage unit (38).
2. The encryption/decryption type traffic signal control system for self-health status monitoring according to claim 1, characterized in that: the front and back of the box body (5) are respectively a front box door (19) and a back box door (34), the front box door and the back box door are respectively provided with a front electric control door lock (20) and a back electric control door lock (22), the box body is provided with a front door control switch (21) and a back door control switch (23) which are respectively used for detecting the opening and closing states of the front box door and the back box door, the side face of the box body is provided with a manual control box (32) and an antenna (33), the front electric control door lock, the back electric control door lock and the antenna are all connected with the output end of a main control board (7), and the front door control switch, the back door control switch and the manual control box are all connected with the input.
3. The encryption and decryption type traffic signal control system for self health state monitoring according to claim 1 or 2, characterized in that an air circuit breaker and an automatic electronic switching-on circuit protection device are arranged in the main power unit, an input alternating current commercial power is connected with an electric energy acquisition unit (36) on the main control board (7) after passing through the air circuit breaker and the automatic electronic switching-on circuit protection device, the electric energy acquisition unit adopts a chip with a model number of H L W8032, and the encryption unit (37) adopts a chip with a signal number of TF32A9FD L1.
4. A control method of an encryption/decryption type traffic signal control system based on self health status monitoring of claim 1, characterized by comprising the steps of:
a) the traffic signal control, the main control board controls the signal lamp conversion of the traffic road intersection through the lamp control board according to the set traffic signal conversion rule so as to control the orderly operation of vehicles at the intersection;
b) acquiring and learning data, wherein a main control board in each traffic signal control device acquires voltage, current and energy consumption data of the whole device, performs timing learning and data characteristic analysis to form a standard calibration data curve of the voltage, the current and the energy consumption data, and then stores the data in a storage unit;
c) data encryption and transmission, wherein a plurality of non-copyable encryption algorithms are stored in an encryption unit, each encryption algorithm has a unique algorithm code corresponding to the unique algorithm code, and the traffic signal control device transmits data to a server through the following steps:
c-1), randomly selecting an algorithm, wherein a microcontroller in the main control board randomly selects an encryption algorithm from a plurality of encryption algorithms, and judges whether the algorithm is adopted in the last communication, if so, the step c-2) is executed, and if not, the step c-3) is executed;
c-2), judging the life cycle of the algorithm, judging whether the continuous use time length of the selected encryption algorithm exceeds the set life cycle, if so, executing the step c-1), replacing a new encryption algorithm, and if not, executing the step c-3);
c-3), encrypting and sending data, encrypting the acquired standard calibration data curve of voltage, current and energy consumption by the main control board by using a selected algorithm, and sending the encrypted data and the algorithm code corresponding to the encryption algorithm to the server;
d) after receiving the data sent by the traffic signal control device, the server finds a corresponding decryption algorithm according to an encryption algorithm code in the data, and decrypts and stores the received data;
e) monitoring by the traffic signal control device, acquiring voltage, current and energy consumption data of the traffic signal control device in real time by the traffic signal control device, comparing the data with a standard calibration data curve stored in the local machine, if the data exceeds the early warning curve, indicating that the current data is abnormal, encrypting the abnormal data according to the step c), and sending the encrypted data to a server to execute the step f);
f) judging device events and regional events, decrypting abnormal data after the server receives the abnormal data, and then judging the events according to the following steps:
f-1), sending a collaborative search instruction, finding n traffic signal control devices at the front end and n traffic signal control devices at the rear end of the data abnormal device by the server, and sending the collaborative search instruction to the 2n devices;
f-2), uploading data, and uploading the voltage, current and energy consumption data collected in real time to the server after the 2n traffic signal control devices receive the investigation command sent by the server;
f-3), data comparison, namely decrypting the uploaded data after the server receives the uploaded data, comparing the current data of 2n +1 devices with the historical data of the devices and the historical data of the devices, and comparing the devices with each other, judging the devices to be regional events if two or more devices have long-time data abnormality exceeding a set time, and pushing an alarm of the regional events to a platform display screen; if the traffic signal control device in the step e) has data abnormity, judging that the device event exists, and pushing an alarm of the area event to a platform display screen.
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| CN1889769A (en) * | 2005-06-29 | 2007-01-03 | 华为技术有限公司 | A periodical updating method for transmission encrypted symmetric keys |
| CN204537462U (en) * | 2015-03-11 | 2015-08-05 | 深圳市格林威交通科技有限公司 | Possesses the traffic signal controlling machine of extra independent signal lamp fault protection circuit |
| CN204791547U (en) * | 2015-07-28 | 2015-11-18 | 扬州市鑫通交通器材集团有限公司 | Novel intelligent transportation signal control system |
| CN106448228A (en) * | 2015-08-05 | 2017-02-22 | 厦门市成利吉智能交通科技有限公司 | Intelligent traffic signal detection method and intelligent controller thereof |
| CN109688226A (en) * | 2019-01-09 | 2019-04-26 | 北京欣智恒科技股份有限公司 | A kind of traffic route instruction system based on LoRa technology |
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