CN110428630B - Road pedestrian detection system and networking method thereof - Google Patents
Road pedestrian detection system and networking method thereof Download PDFInfo
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- G—PHYSICS
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- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
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- G08G1/0137—Measuring and analyzing of parameters relative to traffic conditions for specific applications
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Abstract
A road pedestrian detection system comprises a pedestrian detection device, wherein an early warning prompt end of the pedestrian detection device is connected with a vehicle-mounted terminal; the pedestrian detection device is connected with the cloud end through a plurality of base stations; a networking method of a road pedestrian detection system comprises the following steps: step 1, setting parameters: setting a distance D between adjacent spikes, a maximum communication distance L of a communication unit and a maximum communication distance S of a base station; step 2, networking a plurality of spikes included in the pedestrian detection device; step 3, networking the pedestrian detection device with the vehicle-mounted terminal; step 4, networking the pedestrian detection device with a cloud through a base station; the method has the characteristics of improving the communication efficiency, reducing the communication time delay and ensuring the safety of the pedestrians during traveling.
Description
Technical Field
The invention belongs to the technical field of road pedestrian detection, and particularly relates to a road pedestrian detection system and a networking method thereof.
Background
Under the background of the era of continuous and high-speed development of economic society, automobiles become main transportation tools for people to go out, but when people go out daily, the explosive increase of the automobile holding amount brings a series of problems, such as traffic jam and traffic accidents, so that the efficiency of a transportation system is reduced, the economic and property losses are serious, and the problem of environmental pollution is aggravated. Meanwhile, with the development of the internet of things technology, advanced sensing technology, network technology, computing technology, cooperation technology and the like are continuously developed and innovated, the unmanned technology becomes a feasible solution for improving the current traffic environment, and in many countries and regions, in order to make the traffic environment safer, more intelligent, more efficient and more environment-friendly, the intelligent road construction is gradually scheduled. As a main vulnerable group in a traffic environment, pedestrians have become a main group of casualties caused by road traffic accidents in the world, and the situation is particularly serious in developing countries, so that the safety problem of pedestrians becomes a research hotspot in the construction of intelligent roads, and the construction of a pedestrian detection system is one of the most important parts in the construction of intelligent roads.
In the networking scheme of the existing road pedestrian detection system, after a pedestrian is detected by a pedestrian detection module, the pedestrian detection module is switched to a sending mode, data are sent to adjacent modules in a point-to-point wireless communication mode, the adjacent modules sequentially sense the passing of the pedestrian in a receiving mode, the pedestrian detection module frequently carries out mode switching to complete data transmission and networking, and a vehicle-mounted terminal is not involved in the networking process. This networking scheme has certain disadvantages: firstly, a point-to-point communication mode is adopted among the pedestrian detection modules, one-to-many data transmission cannot be realized, different pedestrian detection modules can only transmit data in sequence, and the networking efficiency of the system is low; secondly, the pedestrian detection modules need to frequently switch working modes to realize data receiving and sending, the communication time delay is high, and the time delay accumulation phenomenon can be caused when the number of the pedestrian detection modules is large, so that the system expandability is poor, and the networking scale is limited; thirdly, in the data transmission process, if a certain pedestrian detection module has a problem, the data transmission of the whole system is interrupted, and the system robustness is poor; fourth, vehicle-mounted terminals and the like are not considered in the networking process, networking is only carried out among the pedestrian detection modules, only pedestrian detection information transmission is carried out, and the system is single in function. The networking problem in the pedestrian detection system plays a crucial role in the safety of the system, and the networking scheme of the existing pedestrian detection system has the defects of low networking efficiency, high communication time delay, poor system robustness, single function and the like, and is difficult to effectively protect the safety of pedestrians.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a road pedestrian detection system and a networking method thereof, which have the characteristics of improving the communication efficiency, reducing the communication time delay and ensuring the safety of the pedestrians during traveling.
In order to achieve the purpose, the invention adopts the technical scheme that: a road pedestrian detection system comprises a pedestrian detection device, wherein an early warning prompt end of the pedestrian detection device is connected with a vehicle-mounted terminal; the pedestrian detection device is connected with the cloud end through a plurality of base stations;
the pedestrian detection device comprises a plurality of spikes which are equidistantly arranged on two sides of a roadway and two sides of a zebra crossing; the spike comprises a detection unit, a light-emitting unit and a communication unit, wherein the output end of the detection unit is connected with the light-emitting unit and the communication unit, and the output end of the light-emitting unit is connected with the communication unit; in order to prevent the ground from shielding data transmission, the spikes are arranged close to the ground, the spikes on two sides of the roadway and two sides of the zebra crossing are staggered with each other, the orientation of the spikes on the same side meets the condition that the detection unit and the communication unit are linearly arranged and consistent in orientation, and in order to ensure that the light-emitting unit can effectively cause the visual perception of a driver, the distance between the spikes is smaller than the maximum communication distance between the detection unit and the communication unit;
the detection unit comprises a microwave detection module, an infrared detection module and a geomagnetic detection module, wherein the microwave detection module and the infrared detection module are arranged on two sides inside the spike and used for detecting pedestrians crossing the roadway, and the geomagnetic detection module is used for detecting vehicles on the roadway;
the light-emitting unit is used for giving an early warning prompt to the vehicles running on the roadway in a light flashing mode;
the communication unit is used for realizing information interaction between the spikes, sending road early warning information to the vehicle-mounted terminal and sending road traffic information comprising pedestrian flow and/or vehicle flow to the base station;
the vehicle-mounted terminal comprises a vehicle-mounted communication module and an early warning module, wherein the vehicle-mounted communication module is used for receiving road early warning information sent by a communication unit, the early warning module comprises an LED lamp and a buzzer, and the early warning module assists a driver in avoiding risks in a lamp lighting and/or buzzing mode;
the base station is used for forwarding the road traffic information sent by the communication unit to a cloud end;
the cloud comprises a server 8, a memory 9 and a processor 10, wherein the server, the memory and the processor are sequentially connected, and the cloud comprises:
the server is used for receiving and recording the road traffic information sent by the base station;
the memory is used for storing and backing up the road traffic information received by the server;
and the processor is used for fusing the road traffic information in the memory to form road flow data and sending the road flow data to the traffic control center.
A networking method of a road pedestrian detection system comprises the following steps:
setting the distance D between adjacent spikes, the maximum communication distance L of the communication unit and the maximum communication distance S of the base station, wherein L is not less than L and not more than S, and numbering each spike as a node in the sequence as ID to ensure that the light-emitting unit can effectively cause the visual perception of a driver;
2a, setting a communication unit as a master-slave integrated working mode, wherein when the detection unit detects that the pedestrian crosses the roadway, the communication unit is in a master mode, and the spike is a master node;
2b, the master node sends networking requests including self IDs to each slave node in a one-to-many data transparent transmission mode;
2c, each slave node calculates the distance between each slave node and the master node according to the ID of the slave node, the ID of the master node sending the networking request and the distance D between adjacent spikes by the following formula (1):
Distance＝|IDm-IDs|·D (1)
the ID of the master node sending the networking request is the ID of the slave node;
2d, each slave node judges whether the distance between the slave node and the master node is smaller than the networking scale required in the actual scene, if so, the slave node responds to the networking request of the master node and executes the step 2e, otherwise, a new master node and a new slave node are determined according to the real-time detection result of the detection unit and executes the step 2b, the networking scale in the embodiment is 10 meters, namely, the master node and the adjacent 4 slave nodes are detected once to perform networking;
2e, the master node selects a networking channel, allocates network addresses for all slave nodes, and then determines a star topology structure which takes the master node as a central node and the slave nodes as sub-nodes to realize networking among the spikes;
3a, setting the spike of the pedestrian crossing the roadway as a main node, and setting the rest spikes and the vehicle-mounted terminal as slave nodes;
3b, a detection unit of the main node acquires road early warning information and sends the road early warning information to the vehicle-mounted terminal through a communication unit;
3c, after receiving the road early warning information sent by the communication unit of the main node, the vehicle-mounted terminal sends a network access request to the main node by adopting the same radio frequency as the communication unit;
3d, the main node receives the network access request of the vehicle-mounted terminal and distributes the local network address to the vehicle-mounted terminal;
3e, the vehicle-mounted terminal establishes connection with the main node through the local network address distributed by the main node until the vehicle-mounted terminal leaves the communication area covered by the communication unit, and then the vehicle-mounted terminal is disconnected from the main node, so that networking of the pedestrian detection device and the vehicle-mounted terminal is realized;
step 4, the pedestrian detection device is networked with the cloud through the base station, and the specific method comprises the following steps:
4a, clustering all the nodes, wherein the number of the nodes contained in each cluster is less than 2M,
setting a spike for detecting pedestrians in each cluster as a main node, setting the main node as a cluster head of the cluster where the main node is located, and connecting each cluster with a base station, wherein
Presentation pair
Getting the whole;
4b, the cluster head sends networking requests including self IDs to each node through the communication unit;
4c, each node determines the cluster head of the cluster according to the received ID and responds to the cluster head;
4d, after receiving the response of the nodes in the cluster, the cluster head establishes a networking link with the cluster head through a communication unit to form a star topology structure which takes the cluster head as a center and the nodes in the cluster as sub-nodes;
4e, the detection units of all nodes in the cluster acquire road traffic information, the road traffic information is sent to the cluster heads through the communication units, the cluster heads send networking requests to the base stations and receive responses of the base stations, the cluster heads establish networking links with the base stations in a LoRa point-to-point transmission mode through the communication units, and the road traffic information is sent to the base stations;
and 4f, the base station sends a networking request to the server in the cloud, and according to the response of the server, the road traffic information is uploaded to the server in the cloud through the cellular network or Wi-Fi, so that the pedestrian detection device is networked with the cloud through the base station.
Compared with the prior art, the invention has the beneficial effects that:
the invention mainly realizes real-time communication among a plurality of spikes of the road pedestrian detection device and early warning communication between the pedestrian detection device and the vehicle-mounted terminal, and uploads real-time road traffic data to the cloud end to provide data support for urban traffic management and control. Compared with other networking methods, the invention mainly has the following advantages:
1) the road pedestrian detection device comprises a plurality of spikes, one-to-many data transmission can be realized, the requirement of one-point triggering multi-point sensing is met, and compared with a point-to-point communication mode, the system networking efficiency is greatly improved;
2) time delay caused by master-slave conversion and mode switching is saved, communication sensitivity among all modules of the system is high, extremely low packet loss rate is realized, and real-time effective receiving and sending of data are really realized;
3) the early warning distance of the pedestrian detection system is increased, meanwhile, the reliability of the system is enhanced, the method is high in expandability, and the networking requirement of large-scale deployment is met;
4) the method is not influenced by temperature, humidity, noise, air flow, dust, light and the like, has strong robustness, and can ensure effective data transmission even if a single module has problems;
the module and the vehicle-mounted terminal are interconnected, danger early warning is carried out in time, real-time road traffic data are uploaded to the cloud, data support is provided for urban traffic control, and the system function is strong.
According to the networking method of the road pedestrian detection system, the real-time communication between the road pedestrian detection modules and the early warning communication between the modules and the vehicle-mounted terminal can be realized through the networking scheme, and the real-time road traffic data is uploaded to the cloud. Compared with the traditional point-to-point wireless communication, the networking mode provided by the scheme can realize one-to-many data transparent transmission, greatly saves time delay caused by master-slave conversion and mode switching, really meets the requirements of data real-time receiving and sending and one-point triggering multipoint sensing, increases the early warning distance of the system, and simultaneously enhances the reliability of the detection system. The method mainly comprises the problems of the establishment and the configuration of communication subnetworks, the realization of interconnection among subnetworks, the interconnection of modules and vehicle-mounted terminals and the like. Firstly, one-to-many communication among a plurality of devices is realized through a wireless communication mode (such as Bluetooth, LoRa, Wi-Fi, Zigbee and the like) of a module, and the part mainly completes the initialization of networking and related parameter configuration work. In addition, a plurality of transceiver modules are added to the devices at the edge of the sub-network to realize the information transceiving function between the sub-networks and realize the connectivity of the whole system. The system firstly forms communication sub-networks through networking among the devices, and then the communication requirements of the whole system are met by mutually connecting the sub-networks.
The pedestrian detection device comprises a plurality of spikes, a star topology structure is constructed by adopting a one-to-many data transparent transmission mode, so that a networking method among the spikes can be realized; the pedestrian detection device is networked with the vehicle-mounted terminal, so that road early warning information can be sent to the vehicle-mounted terminal to assist a driver in avoiding risks; the road pedestrian detection system uploads real-time road traffic data to a cloud end through a base station, and data support is provided for urban traffic control.
By adopting the method disclosed by the invention, networking is carried out among the road pedestrian detection modules, the vehicle-mounted terminal, the cloud data platform and the like, the communication time delay is low, the networking efficiency is high, the robustness of the system is strong, the real-time communication among the pedestrian detection modules and the early warning communication between the modules and the vehicle-mounted terminal can be effectively realized, the danger early warning is carried out in time, and the real-time road traffic flow data is uploaded to the cloud, so that the life and property safety of the pedestrians on the road is ensured, and the data support can be provided for the urban traffic control. The invention greatly improves the communication efficiency, reduces the communication time delay, can realize the real-time communication between the pedestrian ascending detection modules on the road and the early warning communication between the modules and the vehicle-mounted terminal through the networking scheme, ensures the safety of the pedestrians in outgoing, simultaneously uploads the real-time road traffic data to the cloud, promotes the construction of smart roads, provides data support for the management and control of smart city traffic, forms an important component of an intelligent advanced traffic mode, improves the traffic efficiency and the safety, and promotes the economic development.
Drawings
FIG. 1 is a system architecture diagram of the present invention.
Fig. 2 is a networking flow chart of the present invention.
Fig. 3 is a diagram of an application scenario of the present invention.
Fig. 4 is a diagram of an application scenario two of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Referring to fig. 1, a road pedestrian detection system comprises a pedestrian detection device 1, wherein an early warning prompt end of the pedestrian detection device is connected with a vehicle-mounted terminal 2; the pedestrian detection device is connected with the cloud end 4 through a plurality of base stations 3;
the pedestrian detection device comprises a plurality of spikes which are equidistantly arranged on two sides of a roadway and two sides of a zebra crossing; the spike comprises a detection unit 5, a light-emitting unit 6 and a communication unit 7, wherein the output end of the detection unit is connected with the light-emitting unit and the communication unit, and the output end of the light-emitting unit is connected with the communication unit; for preventing ground sheltering from data transmission, the spike is hugged closely ground and is deployed, and the spike of roadway both sides and zebra stripes both sides is crisscross each other, and homonymy spike orientation satisfies the equal linear arrangement of detecting element and communication unit and orientation unanimity, can effectively arouse driver's vision perception for guaranteeing the luminescence unit, and the distance is less than detecting element and the maximum communication distance of communication unit between the spike simultaneously, and this embodiment is got and is followed the distance between the nail and be 5 meters.
The detection unit comprises a microwave detection module, an infrared detection module and a geomagnetic detection module, wherein the microwave detection module and the infrared detection module are arranged on two sides inside the spike and used for detecting pedestrians crossing the roadway, and the geomagnetic detection module is used for detecting vehicles on the roadway;
the light-emitting unit is used for giving an early warning prompt to the vehicles running on the roadway in a light flashing mode;
the communication unit is used for realizing information interaction between the spikes, sending road early warning information to the vehicle-mounted terminal and sending road traffic information comprising pedestrian flow and/or vehicle flow to the base station;
the vehicle-mounted terminal comprises a vehicle-mounted communication module and an early warning module, wherein the vehicle-mounted communication module is used for receiving road early warning information sent by a communication unit, the early warning module comprises an LED lamp and a buzzer, and the early warning module assists a driver in avoiding risks in a lamp lighting and/or buzzing mode;
the base station is used for forwarding the road traffic information sent by the communication unit to a cloud end;
the high in the clouds, including server, memory and treater, server, memory and treater are consecutive, wherein:
the server is used for receiving and recording the road traffic information sent by the base station;
the memory is used for storing and backing up the road traffic information received by the server;
and the processor is used for fusing the road traffic information in the memory to form road flow data and sending the road flow data to the traffic control center.
Referring to fig. 2, a networking method of a road pedestrian detection system includes the following steps:
a networking method of a road pedestrian detection system comprises the following steps:
setting the distance D between adjacent spikes, the maximum communication distance L of the communication unit and the maximum communication distance S of the base station, wherein the distance D is not less than L and not more than S, in order to ensure that the light-emitting unit can effectively cause the visual perception of a driver, the distance D is 5 m, and the number of each spike serving as a node is ID according to the arrangement sequence;
2a, setting a communication unit as a master-slave integrated working mode, wherein when the detection unit detects that the pedestrian crosses the roadway, the communication unit is in a master mode, and the spike is a master node;
2b, the master node sends networking requests including self IDs to each slave node in a one-to-many data transparent transmission mode;
2c, each slave node calculates the distance between each slave node and the master node according to the ID of the slave node, the ID of the master node sending the networking request and the distance D between adjacent spikes by the following formula (1):
Distance＝|IDm-IDs|·D (1)
the ID of the master node sending the networking request is the ID of the slave node;
2d, each slave node judges whether the distance between the slave node and the master node is smaller than the networking scale required in the actual scene, if so, the slave node responds to the networking request of the master node and executes the step 2e, otherwise, a new master node and a new slave node are determined according to the real-time detection result of the detection unit and executes the step 2b, the networking scale in the embodiment is 10 meters, namely, the master node and the adjacent 4 slave nodes are detected once to perform networking;
2e, the master node selects a networking channel, allocates network addresses for all slave nodes, and then determines a star topology structure which takes the master node as a central node and the slave nodes as sub-nodes to realize networking among the spikes;
3a, setting the spike of the pedestrian crossing the roadway as a main node, and setting the rest spikes and the vehicle-mounted terminal as slave nodes;
3b, a detection unit of the main node acquires road early warning information and sends the road early warning information to the vehicle-mounted terminal through a communication unit;
3c, after receiving the road early warning information sent by the communication unit of the main node, the vehicle-mounted terminal sends a network access request to the main node by adopting the same radio frequency as that of the communication unit, wherein the value of the radio frequency is 433 MHz;
3d, the main node receives the network access request of the vehicle-mounted terminal and distributes the local network address to the vehicle-mounted terminal;
3e, the vehicle-mounted terminal establishes connection with the main node through the local network address distributed by the main node until the vehicle-mounted terminal leaves the communication area covered by the communication unit, and then the vehicle-mounted terminal is disconnected from the main node, so that networking of the pedestrian detection device and the vehicle-mounted terminal is realized;
step 4, the pedestrian detection device is networked with the cloud through the base station, and the specific method comprises the following steps:
4a, clustering all the nodes, wherein the number of the nodes contained in each cluster is less than 2M,
setting a spike for detecting pedestrians in each cluster as a main node, setting the main node as a cluster head of the cluster where the main node is located, and connecting each cluster with a base station, wherein
Presentation pair
Getting the whole;
4b, the cluster head sends networking requests including self IDs to each node through the communication unit;
4c, each node determines the cluster head of the cluster according to the received ID and responds to the cluster head;
4d, after receiving the response of the nodes in the cluster, the cluster head establishes a networking link with the cluster head through a communication unit to form a star topology structure which takes the cluster head as a center and the nodes in the cluster as sub-nodes;
4e, the detection units of all nodes in the cluster acquire road traffic information, the road traffic information is sent to the cluster heads through the communication units, the cluster heads send networking requests to the base stations and receive responses of the base stations, the cluster heads establish networking links with the base stations in a LoRa point-to-point transmission mode through the communication units, and the road traffic information is sent to the base stations;
and 4f, the base station sends a networking request to the server in the cloud, and according to the response of the server, the road traffic information is uploaded to the server in the cloud through the cellular network or Wi-Fi, so that the pedestrian detection device is networked with the cloud through the base station.
Referring to fig. 3, a plurality of spikes included in the pedestrian detection device are deployed along both sides of a roadway, the spikes of detected pedestrians are master nodes, a star-shaped topology structure that takes the master nodes as a center and slave nodes as subnodes is determined, and networking among the plurality of spikes included in the pedestrian detection device is realized; the communication unit of the main node sends the road early warning information to the vehicle-mounted terminal, and the vehicle-mounted terminal establishes connection with the main node through a local network address distributed by the main node, so that networking of the pedestrian detection device and the vehicle-mounted terminal is realized; clustering all nodes, setting a spike for detecting pedestrians in each cluster as a main node, enabling the main node to serve as a cluster head of the cluster where the main node is located, enabling each cluster to be connected with a base station, enabling the base station to manage intelligent spikes and intelligent street lamps in an intelligent traffic network, enabling locating equipment in unmanned driving, enabling each node in each cluster to send road traffic information to the cluster head, enabling the cluster head to upload the road traffic information to a server in a cloud, and enabling a pedestrian detection device to be networked with the cloud through the base station.
Referring to fig. 4, in the scene diagram of the pedestrian detection device and the cloud networking, the multiple spikes of the pedestrian detection device are all nodes, all the nodes are clustered, the spike of the pedestrian detected in the cluster is a main node, the main node is used as a cluster head of the cluster where the main node is located, and the cluster head and the nodes in the cluster form a star topology structure which takes the cluster head as a center and the nodes in the cluster as the sub nodes; the cluster head receives road traffic information sent by nodes in the cluster, a networking link is established with base stations through communication units in a LoRa point-to-point transmission mode, each base station can be connected with a plurality of clusters, and the base stations can perform parallel communication on the plurality of nodes; the base station sends a networking request to the server in the cloud, and according to the response of the server, road traffic information is uploaded to the server in the cloud through the cellular network or Wi-Fi, so that the pedestrian detection device is networked with the cloud through the base station.
Claims (1)
1. A networking method of a road pedestrian detection system is characterized by comprising the following steps:
step 1, setting parameters:
setting the distance D between adjacent spikes, the maximum communication distance L of the communication unit and the maximum communication distance S of the base station, wherein L is not less than L and not more than S, and numbering each spike as a node in the sequence as ID to ensure that the light-emitting unit can effectively cause the visual perception of a driver;
step 2, networking among a plurality of spikes of the pedestrian detection device, specifically:
2a, setting a communication unit as a master-slave integrated working mode, wherein when the detection unit detects that the pedestrian crosses the roadway, the communication unit is in a master mode, and the spike is a master node;
2b, the master node sends networking requests including self IDs to each slave node in a one-to-many data transparent transmission mode;
2c, each slave node calculates the distance between each slave node and the master node according to the ID of the slave node, the ID of the master node sending the networking request and the distance D between adjacent spikes by the following formula (1):
Distance＝|ID m -ID s |·D (1)
wherein, ID m is the ID of the main node sending the networking request, and ID s is the ID of the slave node;
2d, each slave node judges whether the distance between the slave node and the master node is smaller than the networking scale required in the actual scene, if so, the slave node responds to the networking request of the master node and executes the step 2e, otherwise, a new master node and a new slave node are determined according to the real-time detection result of the detection unit and executes the step 2b, the networking scale in the embodiment is 10 meters, namely, the master node and the adjacent 4 slave nodes are detected once to perform networking;
2e, the master node selects a networking channel, allocates network addresses for all slave nodes, and then determines a star topology structure which takes the master node as a central node and the slave nodes as sub-nodes to realize networking among the spikes;
step 3, networking the pedestrian detection device and the vehicle-mounted terminal, specifically:
3a, setting the spike of the pedestrian crossing the roadway as a main node, and setting the rest spikes and the vehicle-mounted terminal as slave nodes;
3b, a detection unit of the main node acquires road early warning information and sends the road early warning information to the vehicle-mounted terminal through a communication unit;
3c, after receiving the road early warning information sent by the communication unit of the main node, the vehicle-mounted terminal sends a network access request to the main node by adopting the same radio frequency as the communication unit;
3d, the main node receives the network access request of the vehicle-mounted terminal and distributes the local network address to the vehicle-mounted terminal;
3e, the vehicle-mounted terminal establishes connection with the main node through the local network address distributed by the main node until the vehicle-mounted terminal leaves the communication area covered by the communication unit, and then the vehicle-mounted terminal is disconnected from the main node, so that networking of the pedestrian detection device and the vehicle-mounted terminal is realized;
step 4, the pedestrian detection device is networked with the cloud through the base station, and the specific method comprises the following steps:
4a, clustering all nodes, wherein the number of the nodes contained in each cluster is less than 2M, a spike of a pedestrian detected in each cluster is set as a main node, the main node is set as a cluster head of the cluster, and each cluster is connected with a base station, wherein the rounding is represented;
4b, the cluster head sends networking requests including self IDs to each node through the communication unit;
4c, each node determines the cluster head of the cluster according to the received ID and responds to the cluster head;
4d, after receiving the response of the nodes in the cluster, the cluster head establishes a networking link with the cluster head through a communication unit to form a star topology structure which takes the cluster head as a center and the nodes in the cluster as sub-nodes;
4e, the detection units of all nodes in the cluster acquire road traffic information, the road traffic information is sent to the cluster heads through the communication units, the cluster heads send networking requests to the base stations and receive responses of the base stations, the cluster heads establish networking links with the base stations in a LoRa point-to-point transmission mode through the communication units, and the road traffic information is sent to the base stations;
and 4f, the base station sends a networking request to the server in the cloud, and according to the response of the server, the road traffic information is uploaded to the server in the cloud through the cellular network or Wi-Fi, so that the pedestrian detection device is networked with the cloud through the base station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910852853.0A CN110428630B (en) | 2019-09-10 | 2019-09-10 | Road pedestrian detection system and networking method thereof |
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