“China’s tree limbing laser” is an emerging technology primarily aimed at remote obstacle removal and precise pruning, especially around power lines. It’s often referred to as a “laser cannon,” “laser obstacle remover,” or “laser tree pruning machine.”
Primary Application
The main driving force behind the development and deployment of these laser systems in China appears to be utility maintenance, specifically clearing branches, kites, plastic bags, bird nests, and other non-metallic foreign objects that obstruct power lines or railways. This is a critical safety and efficiency issue for power grids.
Key Features and Advantages
Remote, Non-Contact Operation: This is the most significant advantage, eliminating the need for personnel to climb trees or use cranes, greatly reducing risks of electric shock and falls.
High Precision: Lasers allow for very precise cutting, targeting only the necessary parts of a tree and minimizing damage to the overall tree health.
Efficiency and Speed: These laser systems can cut a 10 cm diameter tree branch in as little as one or two minutes, a task that might take hours with traditional methods.
Safety Features: Many systems incorporate features like radar alarms to prevent people from entering the laser path, electronic fences, and automatic power cut-offs if an intrusion is detected.
Environmental Friendliness: They are a non-polluting energy source, producing no harmful gases or waste.
Versatility: While primarily for utility lines, they can also be applied in landscaping, forestry, and even for removing objects from high-voltage devices.
Portability: Some models are designed to be relatively lightweight and portable for outdoor work.
Technical Specifications
Power: Common laser power options range from 200W to 1000W. Systems with power outputs of 1500W (and even higher, up to 4000W) are being used or are available from Chinese manufacturers.
Effective Working Distance: These devices can effectively cut from distances of 10 to 300 meters.
Wavelength: Often use a wavelength around 1080±10nm (Fiber laser) or 10640±5nm (CO2 laser).
Components: Typically consist of a laser generator, transmitter, high-precision gimbal (for aiming), controller, high-definition sight, and a power supply (often battery-powered for portability).
Developers and Manufacturers
Companies like Dowell Laser and SPT Laser are prominent Chinese manufacturers developing and marketing these “laser cannon” systems. There are also mentions of Dongguan Power Supply Bureau developing fifth-generation laser obstacle removers. One company in Chengdu specifically mounting a “tree limbing laser” for commercial forestry/utility use on a robot dog.
Limitations/Considerations
Cost: These are relatively high-budget tools, not suitable for typical home use.
Thermal Damage to Trees: Laser cutting generates high temperatures, which can leave scorch marks or scars, potentially affecting the tree’s health and healing process.
Safety Training: Due to the inherent danger of Class 4 lasers, operation requires trained professionals and strict adherence to safety protocols.
