Active and passive sensors used in different applications
1. Autonomous Driving Active Sensors : LiDAR: Emits laser pulses to map surroundings in 3D (used for obstacle detection and navigation). Radar: Sends out radio waves to detect the speed and distance of moving objects (crucial for adaptive cruise control). Ultrasonic Sensors : Emit sound waves to detect nearby objects (used in parking assistance). Passive Sensors: Cameras: Capture ambient light to recognize road signs, lanes, pedestrians. Temperature Sensors: Monitor ambient and engine temperature for safe operation. 2. Home Automation / Smart Home Active Sensors: IR Proximity Sensors : Emit infrared light to detect hand gestures or presence (e.g., touchless faucets). Ultrasonic Presence Sensors: Detect motion by emitting and receiving sound waves (used in lighting systems). Passive Sensors: PIR Motion Sensors : Detect infrared radiation from body heat (used in security systems). Light Sensors (Photodiodes): M...