How sensor fusion enables AMRs to maneuver around factory floors efficiently
threshold of reflectivity of the wavelength emitted by the laser. In general, 3D LiDAR can detect low-reflectivity objects with more reliability than 2D LiDAR. The HPS-3D160 3D LiDAR sensor from Seeed Technology integrates high-power 850 nm infrared vertical- cavity surface-emitting laser (VCSEL) emitters and high-photosensitive CMOS. The embedded high- performance processor includes filtering and compensation algorithms and can support multiple simultaneous LiDAR operations. The unit has a range of up to 12 meters with centimeter accuracy. When a 2D LiDAR solution is needed, designers can turn to the TIM781S-2174104 from SICK. It features an aperture angle of 270 degrees with an angular resolution of 0.33 degrees and a scanning frequency of 15 Hz. It has a safety-related working range of 5 meters (Figure 2). Ultrasonic sensors can accurately detect transmissive objects like glass and light-absorbing materials that LiDAR can't always see. Ultrasonic sensors are also less susceptible to interference from high dust, smoke, humidity, and other conditions that can disrupt LiDAR. However, ultrasonic sensors are sensitive to interference from environmental noise, and their detection ranges can be more limited than LiDAR.
Figure 2: This 2D LiDAR sensor has an aperture angle of 270 degrees. (Image source: SICK)
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