Tethered drones can stay in the air 24 hours a day and perform multiple tasks. This kind of drone has significant advantages in application scenarios that require long-term hovering, such as environmental monitoring, communication relay, public safety and other fields.
When tethered drones use optical fiber to transmit data and use non-GPS positioning technology to achieve anti-interference, the following strategies can be adopted:
1. Anti-interference strategy for optical fiber transmission data:
Advantages of optical fiber: Optical fiber data transmission has the characteristics of high speed, large capacity, low loss and strong anti-interference ability. Fiber optic transmission is not affected by electromagnetic interference and therefore can effectively avoid radio wave interference.
Redundant design: In order to ensure the reliability of data transmission, fiber redundancy design can be adopted, that is, multiple optical fibers are used to transmit data in parallel. When one of the optical fibers fails, other optical fibers can take over immediately to ensure that data transmission is not interrupted.
Encryption technology: Although optical fiber transmission itself has high security, data encryption technology, such as AES, RSA and other encryption algorithms, can be used to encrypt the transmitted data and improve data security.
2. Non-GPS positioning anti-interference strategy:
Visual positioning: UAVs can realize the perception and positioning of the environment by carrying visual sensors such as cameras and using image processing and computer vision technology. This method does not rely on external signals, so it can effectively avoid the problem of GPS signals being interfered or blocked.
Inertial navigation system: The inertial navigation system measures the acceleration and angular velocity of the drone and uses an integral algorithm to calculate the position, speed and attitude of the drone. The inertial navigation system has high autonomy and independence and is not affected by external signal interference.
Multi-sensor fusion positioning: Multiple positioning technologies such as visual positioning and inertial navigation can be combined to achieve accurate estimation of the drone's position through data fusion algorithms. This method can make full use of the advantages of various positioning technologies and improve the accuracy and reliability of positioning.
To sum up, tethered drones can achieve stable and reliable data transmission and positioning in complex electromagnetic environments by using optical fiber data transmission, visual positioning, inertial navigation and other non-GPS positioning technologies.
Feasibility of anti-interference technology for tethered drones:
The feasibility of anti-interference technology for tethered drones is very high. With the rapid development of drone technology, drones are increasingly used in military, civilian, commercial and other fields, and anti-interference technology, as an important guarantee for the safety and reliability of drone systems, has also received increasing attention.
In the military field, UAVs often face challenges from various enemy electronic interference means when performing combat tasks such as reconnaissance, reconnaissance, and attack. Therefore, it is of great strategic significance to study the anti-interference technology of tethered UAVs and improve the anti-interference capabilities of UAVs in complex electromagnetic environments.
In the civil and commercial fields, drone applications are becoming more and more widespread, such as drone delivery, drone inspection, drone mapping, etc. These applications require UAVs to fly stably in complex environments. Therefore, the feasibility of anti-interference technology for tethered UAVs is also very high.
Anti-interference technology based on pseudo-random code spread spectrum technology is widely used in the anti-interference field of UAVs. This technology can effectively resist a variety of interference signals and improve the anti-interference ability of the drone. In addition, there are some other anti-interference technologies, such as adaptive filtering technology, frequency domain hopping technology, etc., which can also be applied to the anti-interference field of tethered UAVs.
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