Anti-interference wireless traffic light control system and control method

Abstract

The invention relates to the technical field of traffic lights, in particular to an anti-interference wireless traffic light control system and control method.The anti-interference wireless traffic light control system comprises a signal control master device and a plurality of signal light slave devices, and the signal control master device and the signal light slave devices are in communication connection through at least two wireless communication modes; the signal control master device is used for simultaneously sending control instruction data to be sent through each wireless communication mode; and the signal lamp slave device is used for receiving the control instruction data sent by the signal control master device through different wireless communication modes, and performing data analysis on all the control instruction data to determine effective data. Multiple wireless communication modes are set in the signal control master device and the signal lamp slave device, communication data between the control master device and the signal lamp slave device are transmitted through multiple communication links, and the influence caused by interference is greatly reduced or reduced through distribution of the wireless communication module and data receiving, gathering and filtering.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of traffic signal lights, in particular to an anti-interference wireless traffic light control system and a control method. BACKGROUND

[0002] Due to road intersection construction or temporary power failure, the original traffic signal lights at the road intersection cannot be normally used, and temporary solar traffic signal lights need to be used; when the road intersection is large, one temporary signal light product cannot meet the demand, and multiple traffic signal light products need to be placed at multiple positions to guide traffic, and then the multiple traffic signal light products are uniformly controlled by a master signal machine; due to the limitation of the on-site environment, the communication between the devices can only use wireless communication. At present, the existing solar wireless traffic signal light system mostly uses a single wireless communication technology, such as LoRa, Zigbee or FSK / GFSK modulation mode 433MHz frequency band module. However, these systems face severe challenges in actual deployment: the city environment is full of complex electromagnetic interference, which may cause wireless communication data errors or interruptions. The specific performance is that the signal light control timing is chaotic, and even irregularly extinguished, which seriously affects the traffic order and safety, and even if different frequency wireless modules are replaced, the phenomenon of being disturbed still exists. SUMMARY

[0003] The present application provides an anti-interference wireless traffic light control system and a control method, which is used to solve the technical problem that the single wireless communication mode mentioned in the background art is easy to be disturbed.

[0004] One technical solution of the present application is as follows: an anti-interference wireless traffic light control system, comprising: a signal control master device and a plurality of signal light slave devices, the signal control master device and the signal light slave devices are connected in communication through at least two wireless communication modes; The signal control master device is used to simultaneously send the control instruction data to be sent through each wireless communication mode; The signal light slave device is used to receive the control instruction data sent by the signal control master device through different wireless communication modes, and perform data analysis on all control instruction data to determine valid data.

[0005] Further, the signal control master device comprises a master device master control unit and a multi-channel wireless communication component, the master device master control unit is in communication connection with the multi-channel wireless communication component, The master device master control unit is used to determine the control instruction data to be sent and transmit to the multi-channel wireless communication component; The multi-channel wireless communication component is configured to generate control instruction data packets corresponding to each wireless communication mode according to the control instruction data, and simultaneously transmit all control instruction data packets through the respective corresponding wireless communication mode.

[0006] Further, the signal lamp slave device comprises a slave device master control unit, a multi-channel wireless communication component, and a signal lamp driving unit, wherein the slave device master control unit is connected with the multi-channel wireless communication component and the signal lamp driving unit, and the signal lamp driving unit is connected with the signal lamp. The multi-channel wireless communication component is configured to receive the control instruction data transmitted by the signal control master device through different wireless communication modes, and perform data analysis on the data packets received through different wireless communication modes to determine valid data. The slave device master control unit controls the signal lamp through the signal lamp driving unit according to the valid data.

[0007] Further, the multi-channel wireless communication component comprises a wireless communication module and a data processing core, wherein the data processing core is connected with the wireless communication module. The wireless communication module comprises at least two of a LoRa module, a Zigbee module, and a 433MHz module.

[0008] Further, the signal lamp slave device performs the following processes: All received control instruction data packets are summarized and compared and analyzed respectively. All received control instruction data packets are subjected to repeatability detection to identify control instruction data packets received through different communication modes. Control instruction data packets with error data among all control instruction data packets are filtered. The control instruction data packet with the highest integrity and correctness among all control instruction data packets is selected as valid data.

[0009] Further, the control master device and the signal lamp slave device perform real-time communication, and when the communication interruption duration of any signal lamp slave device and the control master device exceeds a preset threshold, the signal lamp slave device enters a safety state, and the control master device records and reports the communication interruption fault of the signal lamp slave device.

[0010] Further, the signal control master device and the signal lamp slave device each comprise a solar power supply unit configured to supply power to the signal control master device and the signal lamp slave device.

[0011] Another technical solution of the present application is as follows: an anti-interference wireless traffic light control method applied to any of the anti-interference wireless traffic light control systems described above, comprising: The signal control master device is configured to simultaneously transmit the control instruction data to be transmitted through each wireless communication mode; The signal lamp slave device is configured to receive the control instruction data transmitted by the signal control master device through different wireless communication modes, and perform data analysis on all control instruction data to determine valid data.

[0012] The present application has the following advantages: by providing multiple wireless communication modes in the signal control master device and the signal lamp slave device, the communication data between the control master device and the signal lamp slave device is transmitted through multiple communication links, and the distribution of the wireless communication module, data reception, and filtering are performed, which greatly reduces or eliminates the influence of interference.

[0013] The anti-interference capability of the present application is significantly improved: multi-channel redundant communication link + intelligent data aggregation and filtering mechanism, which completely solves the problem of single wireless module affected by electromagnetic interference, and the system no longer relies on the stability of a single wireless link. The stable operation rate of the device is greatly improved. Even if one or two wireless frequency bands are interfered, as long as one link can correctly transmit data, the entire communication can remain reliable, thereby greatly reducing the probability of signal lamp out of control due to interference, and improving the robustness and user experience of the system.

[0014] The present application is accurate and precise: real-time communication between master and slave devices, multi-link synchronous transmission of control instructions, ensuring that the timing of the signal lamp is strictly consistent, and avoiding traffic conflicts.

[0015] The present application has high reliability: fault automatic protection mechanism + solar power supply guarantee, which can adapt to the use requirements of complex temporary scenes and reduce operation and maintenance costs.

[0016] The present application has strong versatility: the wireless communication module supports plug and play, and can adapt to different types of temporary traffic signal lamps, and has a wide range of applications. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall framework of the present application.

[0018] Figure 2 is a schematic diagram of the wireless communication module in the present application.

[0019] Figure 3 is a data transmission flowchart of the present application.

[0020] Figure 4 is a data reception flowchart of the present application. DETAILED DESCRIPTION

[0021] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. The described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0022] In one technical solution of the present invention, Figure 1 This is a schematic diagram illustrating the specific structure of an anti-interference wireless traffic light control system according to the present invention, as shown below. Figure 1 As shown, the present invention includes: The signal control master device 1 and several traffic light slave devices 2 are connected to each other through at least two wireless communication methods.

[0023] The signal control master device 1 is used to simultaneously transmit the control command data to be sent through various wireless communication methods.

[0024] The signal light slave device 2 is used to receive control command data sent by the signal control master device 1 through different wireless communication methods, and to perform data analysis on all control command data to determine valid data.

[0025] In one embodiment of this technical solution, the signal control master device 1 includes: a master device main control unit 11 and a multi-channel wireless communication component 3, wherein the master device main control unit 11 is communicatively connected to the multi-channel wireless communication component 3. The main control unit 11 of the main device is used to determine the control command data to be sent and transmit it to the multi-channel wireless communication component 3; The multi-channel wireless communication component 3 is used to generate control command data packets corresponding to each wireless communication mode according to the control command data, and to send all control command data packets simultaneously through their respective wireless communication modes.

[0026] Specifically, the main control unit 11 of the main equipment can be a processor module with logic processing capabilities, such as a microcontroller or MCU.

[0027] In one embodiment of this technical solution, the traffic light slave device 2 includes a slave device master control unit 21, a multi-channel wireless communication component 3, and a traffic light driving unit 22. The slave device master control unit 21 is connected to the multi-channel wireless communication component 3 and the traffic light driving unit 22, respectively, and the traffic light driving unit 22 is connected to the traffic light. The multi-channel wireless communication component 3 is used to receive control command data sent by the signal control master device 1 through different wireless communication methods, and to analyze the data packets received through different wireless communication methods to determine valid data; The slave device master control unit 21 controls the signal light through the signal light drive unit 22 based on the valid data.

[0028] Specifically, the main control unit 21 can be a processor module with logic processing capabilities, such as a microcontroller or MCU. The traffic light drive unit 22 is a device for driving traffic lights, which is a conventional technology in this field, and therefore will not be described in detail here.

[0029] In one embodiment of this technical solution, such as Figure 2 As shown, the multi-channel wireless communication component 3 includes: a wireless communication module and a data processing core 34, wherein the data processing core 34 is connected to the wireless communication module; the wireless communication module includes at least two of the following: a LoRa module 31, a Zigbee module 32, and a 433MHz module 33.

[0030] In one embodiment of this technical solution, both the signal control master device 1 and the traffic light slave device 2 include a solar power supply unit, which is used to supply power to the signal control master device 1 and the traffic light slave device 2.

[0031] In one embodiment of this technical solution, the master control device and the traffic light slave device 2 communicate in real time. When the communication interruption duration between any traffic light slave device 2 and the master control device exceeds a preset threshold, the traffic light slave device 2 enters a safe state, and the master control device records and reports the communication interruption fault of the traffic light slave device 2. The preset threshold is 2 seconds. Each of the traffic light slave devices 2 transmits status monitoring data to the signal control master device 1. When the master control device does not receive status monitoring data from the traffic light slave device 2 within 2 seconds, it marks the traffic light slave device 2 as faulty. When the traffic light slave device 2 does not receive control command data from the master control device within a preset time, it enters a safe state.

[0032] This technical solution includes a signal control master device 1 and multiple traffic light slave devices 2. Both the master and slave devices have built-in wireless communication modules, which integrate a LoRa module 31, a Zigbee module 32, and a conventional 433MHz wireless module. The system adopts a one-master-multiple-slave architecture, with the signal control master device 1 communicating wirelessly with the multiple traffic light control slave devices. All devices include wireless communication modules, supporting LoRa, Zigbee, and 433MHz wireless standards.

[0033] Each signal control master device 1 and signal light slave device 2 is equipped with a solar power supply unit to ensure normal operation in the absence of mains power.

[0034] Each traffic light is equipped with a drive unit and a traffic light from device 2 to provide traffic signal release instructions at the intersection.

[0035] The signal control master device 1 and the signal light slave device 2 transmit data through three parallel wireless links, improving communication reliability.

[0036] The core innovation of this invention lies in the working mechanism of the wireless communication module: Transmitter: When the main control unit 11 of the main device needs to send data, the wireless communication module does not select one of the modules to send, but copies the control command data and sends it out simultaneously through LoRa, Zigbee and 433MHz modules 33.

[0037] Receiver: The wireless communication module simultaneously monitors all communication modules. When it receives data, it aggregates data packets from different links, performs comparison, deduplication, and verification. For example, if three modules receive data packets with the same content, the component will discard the duplicate and submit a copy upwards. If a module receives garbled data due to interference, the component can filter it by comparing it with other correct data. Ultimately, it ensures that only unique and correct data is uploaded to the main control unit.

[0038] The multi-channel wireless communication component 3 is connected to the master / slave device control unit 21 of the device via a serial port, and the data processing core 34 is responsible for coordinating the work of multiple wireless modules. In the master device, data distribution is performed: the data to be sent is copied to each wireless communication module.

[0039] From the device, perform data aggregation: collect data received by each module; perform duplicate detection: identify identical data packets from different links; and perform data filtering: remove erroneous or duplicate data.

[0040] The three wireless communication modules operate independently, providing communication redundancy.

[0041] In this technical solution, the traffic light performs the following process from device 2: All received control command data packets are aggregated, and each control command data packet is compared and analyzed separately.

[0042] Perform duplicate detection on all received control command data packets to identify control command data packets received through different communication methods.

[0043] Filter all control command data packets containing erroneous data.

[0044] The control command data packet with the highest integrity and correctness among all control command data packets is selected as valid data.

[0045] The workflow of this invention is as follows: The main signal control device 1 is placed at the optimal command position at the intersection, and multiple traffic lights are distributed in different directions at the intersection by device 2 as needed. All devices operate via batteries charged by solar panels.

[0046] After the system is powered on, the master device and the slave device automatically establish a connection through their multi-channel wireless communication component 3. The master device's control command data, such as light color switching and timing synchronization, is simultaneously transmitted through LoRa, Zigbee, and 433MHz modules 33 within the communication component. The slave device's communication component receives these commands from multiple links, processes them internally to ensure that only the correct command is delivered to the slave device's master control unit 21, driving the indicator lights to change.

[0047] Simultaneously, the status monitoring data from the slave devices is also sent back to the master device in the same way. The master device continuously monitors the connection with each slave device. If no valid communication is received from any slave device for two consecutive seconds, it means that all wireless links may have failed. The master device then determines that the slave device's communication has been interrupted and records the fault. The corresponding slave device will also automatically turn off its lights and enter a safe state because it cannot receive a heartbeat signal from the master device.

[0048] Through the above methods, the present invention effectively ensures the stable operation of temporary traffic signal systems in complex wireless environments.

[0049] In one technical solution of the present invention, an anti-interference wireless traffic light control method is provided. This technical solution is applied to any of the above-mentioned anti-interference wireless traffic light control systems, including: The signal control master device 1 is used to simultaneously transmit the control command data to be sent through various wireless communication methods. The signal light slave device 2 is used to receive control command data sent by the signal control master device 1 through different wireless communication methods, and to perform data analysis on all control command data to determine valid data.

[0050] Specifically, such as Figure 3 and Figure 4 As shown, the complete process of data transmission, replication, distribution, reception, aggregation, comparison, filtering, and output is described in detail.

[0051] like Figure 3 As shown, the sending process is as follows: Step 1: Start sending data. The main control unit needs to send control commands.

[0052] Step 2: Receive data from the serial port. The communication component receives the raw data packets through the serial port.

[0053] Step 3: Data replication and distribution, copying the same data packet three times.

[0054] Step 4: Parallel transmission: Transmit via LoRa module 31; transmit via Zigbee module 32; transmit via 433MHz module 33.

[0055] Step 5: Sending complete. Confirm that all modules have been sent.

[0056] Step 6: End, return to waiting state.

[0057] like Figure 4 As shown, the receiving process is as follows: Step 1: Start listening for data, and each wireless module enters the receiving state.

[0058] Step 2: Each module continuously monitors the wireless signal, with LoRa, Zigbee, and 433MHz modules simultaneously monitoring the wireless signal.

[0059] Step 3: Data packet summary, collecting all data packets received by all modules.

[0060] Step 4: Data packet comparison and analysis: Compare the integrity of the content of each data packet; check the timestamp and sequence number of the data packets.

[0061] Step 5: Duplicate data detection, identifying identical data packets from different links.

[0062] Step 6: Error data filtering, removing erroneous data caused by interference.

[0063] Step 7: Extract valid data packets and retain correct and complete data packets.

[0064] Step 8: Upload data via serial port to transmit the final valid data to the main control unit.

[0065] Step 9: End, return to listening state.

[0066] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An anti-jamming wireless traffic light control system, characterized by, The application relates to a signal control master device (1) and a plurality of signal lamp slave devices (2), wherein the signal control master device (1) and the signal lamp slave devices (2) are connected through at least two wireless communication modes; the signal control master device (1) is used for simultaneously sending control instruction data to be sent through each wireless communication mode; the signal lamp slave device (2) is used for receiving the control instruction data sent by the signal control master device (1) through different wireless communication modes, and performing data analysis on all the control instruction data to determine valid data. The signal control master device (1) comprises a master control unit (11) and a multi-channel wireless communication assembly (3), the master control unit (11) is connected with the multi-channel wireless communication assembly (3), the master control unit (11) is used for determining the control instruction data to be sent and transmitting the control instruction data to the multi-channel wireless communication assembly (3), and the multi-channel wireless communication assembly (3) is used for generating control instruction data packets corresponding to each wireless communication mode according to the control instruction data, and simultaneously sending all the control instruction data packets through each corresponding wireless communication mode. The signal lamp slave device (2) comprises a slave control unit (21), a multi-channel wireless communication assembly (3) and a signal lamp driving unit (22), the slave control unit (21) is connected with the multi-channel wireless communication assembly (3) and the signal lamp driving unit (22), and the signal lamp driving unit (22) is connected with a signal lamp; the multi-channel wireless communication assembly (3) is used for receiving the control instruction data sent by the signal control master device (1) through different wireless communication modes, and performing data analysis on the data packets received through different wireless communication modes to determine valid data; and the slave control unit (21) controls the signal lamp through the signal lamp driving unit (22) according to the valid data. The multi-channel wireless communication assembly (3) comprises a wireless communication module and a data processing core (34), the data processing core (34) is connected with the wireless communication module, the wireless communication module comprises at least two of a LoRa module (31), a Zigbee module (32) and a 433MHz module (33), and the signal lamp slave device (2) performs the following processes: all the received control instruction data packets are summarized and compared and analyzed respectively, all the received control instruction data packets are detected for repetition, control instruction data packets received through different communication modes are identified, error data in all the control instruction data packets are filtered, and the control instruction data packet with the highest integrity and correctness is selected as valid data.

2. The tamper-resistant wireless traffic light control system of claim 1, wherein, ​ ​ ​ 3. The tamper-resistant wireless traffic light control system of claim 1, wherein, ​ ​ ​ 4. The tamper-resistant wireless traffic light control system of claim 2 or 3, wherein, ​ ​ 5. The tamper-resistant wireless traffic light control system of claim 1, wherein, ​ ​ ​ ​ ​ 6. The tamper-resistant wireless traffic light control system of claim 1, wherein, The control master device and the signal lamp slave device (2) carry out real-time communication, when the communication interruption duration of any signal lamp slave device (2) and the control master device exceeds a preset threshold, the signal lamp slave device (2) enters a safety state, and meanwhile the control master device records and reports the communication interruption fault of the signal lamp slave device (2).

7. The tamper-resistant wireless traffic light control system of claim 1, wherein, The signal control master device (1) and the signal lamp slave device (2) both comprise a solar power supply unit, which is used for supplying power to the signal control master device (1) and the signal lamp slave device (2).

8. An anti-jamming wireless traffic light control method, characterized by, The anti-interference wireless traffic light control system is applied to any one of claims 1-7, comprising: The signal control master device (1) is used for simultaneously sending the control instruction data to be sent through each wireless communication mode; The signal lamp slave device (2) is used for receiving the control instruction data sent by the signal control master device (1) through different wireless communication modes, and performing data analysis on all control instruction data to determine valid data.

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