I. Unmanned Aerial Vehicle (UAV) Obstacle Avoidance Technology
However, rapid technological advancements have been accompanied by inadequate regulation. Drones pose certain safety hazards when flying in the air, and this year there have been numerous instances of drones disrupting airport flights, drawing significant attention from relevant departments.
Currently, most commercially available aerial drones cost only around 1,000 yuan, equivalent to the price of a smartphone, making them quite easy to acquire. However, given the lack of comprehensive laws and regulations, many people may not realize they are breaking the law while "enjoying flight," and some criminals even use drones for illegal activities. Therefore, in addition to further improving relevant regulations and popularizing related knowledge, general mandatory control measures against the phenomenon of unauthorized and reckless drone flights are still essential.
Generally speaking, improving drone countermeasure systems requires better technology, which is fundamental for us. Technology is key to system improvement; without good technology, better results cannot be achieved. Therefore, technology is a crucial part of the process, and we must actively learn about it.
Truly keeping pace with the times is a crucial part of upgrading drone countermeasure systems. This means we must keep up with the times and continuously improve ourselves to achieve better results. These aspects are extremely important; otherwise, we won't reap the rewards. This is closely related to everyone's progress. A thorough understanding of all aspects will lead to a better overall process, and improvements are essential.
Why is obstacle avoidance so important for drones?
1. Obstacle avoidance systems are built into drones for three reasons. They're there to warn pilots about nearby objects, preventing novice pilots from ruining their investment and making drones safer. Even experienced pilots know to avoid obstacles when flying in densely populated areas.
2. If you plan to fly in an area with many obstacles (such as trees, buildings and other large structures), then it is a good idea to choose a drone with an integrated obstacle avoidance system as standard.
II. Why apply ultrasonic sensing to drone landing, hovering, and ground tracking?
Drone landing assistance is a feature of drones that detects the distance between the drone's bottom and the landing area, determines whether the landing point is safe, and then slowly descends to the landing area. Although GPS monitoring, barometric pressure sensing, and other sensing technologies aid in the landing process, ultrasonic sensing is the drone's primary and most accurate judgment method. Most drones also have hovering and ground tracking modes, mainly used for capturing continuous footage and land navigation, where ultrasonic sensors help maintain the drone at a constant altitude above the ground.
A common requirement for UAV ground tracking and landing is the ability to reliably detect distances up to 5 meters above the ground. Assuming proper signal conditioning and processing, ultrasonic sensors in the 40-60 kHz range can typically meet this requirement.
Ultrasonic sensing can detect surfaces that are difficult to detect with other technologies. While many sensing technologies can detect the proximity of objects, ultrasonic sensing can detect distances during drone landings, where the real-time distance to the ground must be considered during descent. Every gram of a drone's weight can affect its flight time. Maxbotix's XL-MaxSonar-WR series MB7052 ultrasonic sensor for drones features high performance, small size, low cost, ease of use, and lightweight design. We recommend a drone ultrasonic sensor weighing approximately 5.8 grams. This drone ultrasonic sensor performs well in terms of solution cost and reliability on various surfaces.
With the increasing prevalence of drone applications, what are the ways to achieve obstacle avoidance technology? Next, let's learn about the application of sensors in drone obstacle avoidance.
Obstacle avoidance technology, as a guarantee for increasing the safety of drone flight, is also developing rapidly with technological advancements. The "obstacle avoidance function" is achieved by drones using their sensors to collect information about the surrounding environment during flight, measuring distances, and then making corresponding action commands to avoid obstacles. The most direct benefit is that collisions previously caused by human negligence can now be avoided through obstacle avoidance, ensuring drone flight safety and preventing damage to surrounding people and property, further lowering the barrier to entry for drone flying. Currently, the most common obstacle avoidance technologies for drones include ultrasonic sensors, infrared sensors, laser sensors, and visual sensors.
