Power inspection drone wireless module MESH wireless ad hoc network scheme, at present, in the daily power line inspection and maintenance work, the existing wireless transmission methods are difficult to meet the growing demand for information transmission at all levels. The specific performance is two more and two less: First, there are more narrow-band transmission means and fewer broadband transmission means. The existing wireless private network system mainly uses a single transmission content, such as voice and newspaper, such as short wave, trunking, etc., and the compatibility between each terminal is very poor. For multimedia information such as text, pictures, and images, there are relatively few wireless transmission methods. Second, there are more fixed backbone transmission means, and less mobile terminal transmission means. The fixed backbone transmission method is mainly composed of optical fibers and satellites, forming multiple routes, multiple loops, and interruption of a single route, which does not affect the backbone transmission. The transmission method of mobile terminals mainly relies on short-wave, ultra-short-wave or public networks, with narrow bandwidth, difficult control, and high requirements, which cannot meet the wireless transmission requirements of wireless modules for terminal big data under the new situation.
Due to the lack of flexibility and autonomous relay capability, the traditional communication architecture based on central nodes is difficult to meet the communication requirements of complex scenarios (such as urban complexes, basements, tunnels, etc.). In recent years, the self-organizing network technology based on the centerless MESH has gradually matured and been deeply applied. Based on its advantages of self-organization, self-recovery, multi-hop automatic relay, and no center, the self-organizing network technology greatly improves the reliability, environmental adaptability and practicability of the emergency communication system.
Centerless ad hoc networking technology (also known as Mesh networking) is a networking technology based on the principle of equality and independence. All nodes are equal and independent. There is no dependency between nodes, and networking and data transmission are carried out through negotiation. Compared with the network based on the central node, the main advantages of the non-centralized ad hoc network technology are:
1) Strong network robustness: self-organization, self-recovery, stable and reliable network;
2) Easy to deploy and install: The network topology can be randomly deployed without relying on any key nodes, and it can be used with one-click startup;
3) Flexible structure of wireless module MESH ad hoc network: automatic maintenance of network links, automatic routing calculation, etc.; no configuration is required, new network entry nodes can be accepted at any time, and off-grid nodes can be deleted at any time, with high network flexibility;
4) Co-frequency technology: co-frequency nodes can effectively save spectrum resources;
5) Load balancing technology: automatically calculate and select the appropriate end-to-end path, and avoid congested areas according to the real-time load of the network;
6) Non-line-of-sight transmission: seamless coverage in non-line-of-sight scenarios can be guaranteed by multi-hop.
demand analysis:
1) In order to solve the communication problems of group operators without public network coverage or weak public network signals, and improve the actual communication capabilities of staff in various complex environments, the group operators perform power inspection drone transmission line inspection tasks in the case of;
2) Wireless module ad hoc network function. Ensure that the network can be used within a radius of 3 kilometers, the center of the circle is the area without public network coverage, and any point is the center of the circle;
3) Point-to-point function. The members of the operation group can use the self-organized network for voice, and through the video communication, they can view the audio and video information of the surrounding teammates;
4) Multi-to-point function. Through a PAD or other platform, team leaders can view video and audio information in real-time as well as other data that each team member is exposed to.
5) The function of point to far point. First-line video and audio can be transmitted to the field through personal devices, which are then transmitted to the big screen in the command room.
The overall scheme adopts the method of wireless module MESH ad hoc network. When a certain number of ad hoc network node devices are arranged on the power towers within the specified transmission line range, according to the actual site environment, it is recommended that the height of the devices be set not less than 20 meters to meet the local wireless signal coverage in the specified area.
In practical applications, the power inspection drone can move and switch arbitrarily within the signal coverage range, and the on-site audio and video screens can be transmitted back to the command center in real time through the self-organized network link. On-site emergency maintenance vehicles can also be used as temporary command and interconnected with the command center. (The wireless network channel protocol is a standard TCP/IP network protocol. If the customer needs to realize data transmission of other special functions, he only needs to abide by the above protocol)
Micro drone wireless module mesh ad hoc network equipment is small and exquisite. It is a mobile network device specially designed for drones, unmanned vehicles, unmanned boats, robots and other mobile network devices with lightweight network requirements. This model has the function of self-organizing network communication. In actual use, it can quickly build a three-dimensional network, connect with handheld single-person systems, vehicle-mounted systems and surrounding base station network equipment, and adopts ring network design without worrying about ring network congestion. The advanced MESH design concept does not require a central gateway. Any one can realize the self-organizing network function. Any device in the team will go offline, and the corresponding device will continue to communicate within effective antenna coverage to ensure the network does not go offline.
Features:
It can be used as a terminal node, a relay node or a central node, without a central co-frequency network, all nodes have equal status, and can also quickly establish a wireless communication network.
It can support more than 30 nodes, multi-node fast and flexible networking, and the same frequency networking.
Wireless module MESH wireless ad hoc network system supports any network topology, such as point-to-multipoint, link relay, network network and hybrid network and other high data bandwidth fast movement, the peak data bandwidth of MESH wireless ad hoc network system is 300MBPS (based on 20MHz wave bandwidth)
It can effectively suppress out-of-band harmonic interference, improve the anti-interference performance and signal-to-noise ratio of the signal, and pass the external filter.
The wireless module MESH wireless ad hoc network system has strong anti-multipath capability and supports automatic wireless relay transmission. All nodes in the system support multi-hop relay (relay) communication, which can adapt to various terrains and application scenarios.
When a single node device fails, the MESH wireless ad hoc network system will not affect the use of the entire network.
Security and confidentiality, the system is encrypted by multi-lock grouping, such as operating frequency, carrier bandwidth, scrambling code (ie MESHID), communication distance and networking mode.
Wireless module MESH wireless ad hoc network system adopts all-IP design concept, currently supports undifferentiated transmission of various data, easy to interconnect with other heterogeneous communication systems, and realizes real-time interactive support for multimedia services. MESH wireless ad hoc network system supports voice , real-time transmission of images, data, and positioning information (GPS/Beidou).
Applications in different scenarios:
Power Repair
Solve the problem of interconnection between aerial workers and ground commanders. The operators load professional wireless networking terminal equipment, transmit the real-time images of aerial lines to the ground command platform, and at the same time ensure the voice communication between the tower and the tower to ensure the ground commander. According to the video picture, make the operation command in time. Real-time and effective supervision and reasonable operation of aerial workers can greatly improve the work efficiency of line maintenance and more effectively protect the personal safety of aerial workers.
police use
Emergency business functions such as emergency teams, user clusters, video calls, emergency clusters, video conferences, and electronic maps can be implemented through multi-network integrated emergency command software. Command centers have real-time visibility into the location and surroundings of frontline workers. At the same time, emergency command and dispatch can provide flexible dispatching means. Various departments and units can establish emergency dispatch teams. The commander can directly command the team members, the team members can communicate with each other, the front-end personnel can directly report to the commander as needed, and the live video can be returned to the commander in real time to achieve flat command of emergency services.
fire rescue
In the event of a fire alarm, every second is related to the safety of property and personal safety. Especially after the firefighters enter the fire scene, the commander needs to quickly establish a communication channel with the firefighters, not only to use the fastest method to relieve the fire, but also to fully protect the firefighters personal safety. Through the emergency dispatching station, the command center can quickly understand the police situation, the real-time situation on the scene, the surrounding police force deployment, and the police reinforcement situation, and quickly establish its accident handling team according to the deployment. Routes and other arrangements are optimally arranged to quickly deal with emergencies. It plays an important role in rapid rescue decision-making and protection of life and property in fire rescue.
Civil air defense emergency
Through the wireless module MESH ad hoc network emergency command system, the civil air defense emergency department can quickly understand the first-hand information on the scene, support the emergency rescue team, quickly formulate emergency plans and evacuation countermeasures, effectively reduce casualties or property losses, and maintain disasters caused by disasters. Social stability (accidents such as fire, lightning, typhoon, flood, etc.).
