Laser weeders use AI-driven robotics, computer vision, and high-powered lasers to detect and destroy weeds with millimeter-level precision.
🔧 Core Components
- High-Resolution Camera Arrays
- Capture real-time images of the field, covering every inch as the robot moves.
- Often include RGB and infrared cameras for better contrast between crops and weeds.
- Computer Vision + AI/ML Models
- Pre-trained deep learning models (e.g., convolutional neural networks) identify plant species at the leaf level.
- The system distinguishes between crops and weeds with ~95%+ accuracy, even in dense planting environments.
- Precision Laser System
- Typically uses high-energy CO₂ or fiber lasers (around 150W–300W).
- Mounted on robotic gantries or articulated arms to aim at individual weeds.
- Delivers short bursts of intense heat (over 1000°C) to rupture plant cells and kill the meristem, the growing point of the weed.
- Real-Time Targeting System
- Based on GPS + inertial navigation for macro location and robotic micro-adjustments for laser targeting.
- Laser firing is triggered only when the system is confident in weed classification.
- Autonomous Navigation
- The machine moves through rows using GPS, LiDAR, or RTK guidance, operating day or night.
⚙️ How It Works
- Scan: Cameras capture continuous field imagery.
- Classify: AI model distinguishes weeds from crops using shape, color, and texture.
- Target: Onboard computing calculates weed position relative to the laser.
- Fire: The laser pulses heat energy onto the weed, destroying its tissue.
- Move: The robot advances and repeats the process, adjusting for weed density and crop spacing.
🔬 Key Technical Advantages
- No herbicides: Completely non-chemical.
- Selective: Targets only weeds, preserving soil health and crop integrity.
- Data capture: Logs every weed hit and creates real-time field maps for later analysis.
- Scalable: Works across row crops like lettuce, onions, and carrots, with some systems processing over 100,000 plants per hour.