SENSORS
Sensors
The Biometric Autonomous Droid (BAD-2024) wheelchair is equipped with various sensors to ensure precise navigation and user safety. Key sensors include:
- Joystick: An analog joystick mounted on the armrest allows manual control of the wheelchair. It uses Hall Effect sensors to detect directional input, which is processed by a Raspberry Pi for smooth and reliable movement.
- LiDAR Sensors: LiDAR technology provides accurate distance measurements by emitting laser beams and measuring their return times. The sensor captures a 360-degree view, helping the wheelchair detect obstacles and navigate safely. A 2D LiDAR sensor will scan the front and rear areas to avoid collisions.
- Ultrasonic Sensors: These sensors detect objects by emitting high-frequency sound waves and calculating the reflection time. They are ideal for navigating narrow spaces and sensing transparent obstacles, supplementing the LiDAR system.
- PIR Sensors: Passive infrared sensors detect infrared radiation emitted by humans or animals, helping the wheelchair identify the presence of individuals within its environment, which enhances safety in crowded areas.
- IMU (Inertial Measurement Unit): The IMU measures the wheelchair’s orientation and movement using accelerometers and gyroscopes, allowing the system to detect if it’s on a slope or if it has fallen over.
These sensors work together to enable autonomous navigation, obstacle detection, and enhanced user control.
